22 files changed, 5694 insertions, 0 deletions

diff --git a/accel-pppd/ppp/CMakeLists.txt b/accel-pppd/ppp/CMakeLists.txt
new file mode 100644
index 0000000..f4c0f04
--- /dev/null
+++ b/accel-pppd/ppp/CMakeLists.txt
@@ -0,0 +1,19 @@
+SET(target ppp)
+SET(sources_c 
+	ppp.c
+	ppp_fsm.c
+	ppp_lcp.c
+	lcp_opt_mru.c
+	lcp_opt_magic.c
+	lcp_opt_pcomp.c
+	lcp_opt_accomp.c
+	ppp_auth.c
+	ppp_ipcp.c
+	ipcp_opt_ipaddr.c
+	ipcp_opt_dns.c
+	ppp_ccp.c	
+)
+INCLUDE_DIRECTORIES(${CMAKE_CURRENT_SOURCE_DIR})
+
+ADD_LIBRARY(${target} SHARED ${sources_c})
+
diff --git a/accel-pppd/ppp/ccp_mppe.c b/accel-pppd/ppp/ccp_mppe.c
new file mode 100644
index 0000000..0952aa0
--- /dev/null
+++ b/accel-pppd/ppp/ccp_mppe.c
@@ -0,0 +1,259 @@
+#include <stdlib.h>
+#include <string.h>
+#include <errno.h>
+#include <sys/socket.h>
+#include <sys/ioctl.h>
+#include "linux_ppp.h"
+
+#include "ppp.h"
+#include "ppp_ccp.h"
+#include "log.h"
+#include "events.h"
+
+#include "memdebug.h"
+
+#define MPPE_H (1 << 24)
+#define MPPE_M (1 << 7)
+#define MPPE_S (1 << 6)
+#define MPPE_L (1 << 5)
+#define MPPE_D (1 << 4)
+#define MPPE_C (1 << 0)
+
+#define MPPE_PAD 4
+
+static struct ccp_option_t *mppe_init(struct ppp_ccp_t *ccp);
+static void mppe_free(struct ppp_ccp_t *ccp, struct ccp_option_t *opt);
+static int mppe_send_conf_req(struct ppp_ccp_t *ccp, struct ccp_option_t *opt, uint8_t *ptr);
+static int mppe_recv_conf_req(struct ppp_ccp_t *ccp, struct ccp_option_t *opt, uint8_t *ptr);
+static int mppe_recv_conf_nak(struct ppp_ccp_t *ccp, struct ccp_option_t *opt, uint8_t *ptr);
+static int mppe_recv_conf_rej(struct ppp_ccp_t *ccp, struct ccp_option_t *opt, uint8_t *ptr);
+static void mppe_print(void (*print)(const char *fmt,...),struct ccp_option_t*, uint8_t *ptr);
+
+struct mppe_option_t
+{
+	struct ccp_option_t opt;
+	int mppe;
+	uint8_t recv_key[16];
+	uint8_t send_key[16];
+	int policy; // 1 - allowed, 2 - required
+};
+
+static struct ccp_option_handler_t mppe_opt_hnd = {
+	.init = mppe_init,
+	.send_conf_req = mppe_send_conf_req,
+	.send_conf_nak = mppe_send_conf_req,
+	.recv_conf_req = mppe_recv_conf_req,
+	.recv_conf_nak = mppe_recv_conf_nak,
+	.recv_conf_rej = mppe_recv_conf_rej,
+	.free = mppe_free,
+	.print = mppe_print,
+};
+
+static struct ccp_option_t *mppe_init(struct ppp_ccp_t *ccp)
+{
+	struct mppe_option_t *mppe_opt = _malloc(sizeof(*mppe_opt));
+	memset(mppe_opt, 0, sizeof(*mppe_opt));
+	mppe_opt->mppe = -1;
+	mppe_opt->opt.id = CI_MPPE;
+	mppe_opt->opt.len = 6;
+
+	return &mppe_opt->opt;
+}
+
+static void mppe_free(struct ppp_ccp_t *ccp, struct ccp_option_t *opt)
+{
+	struct mppe_option_t *mppe_opt = container_of(opt, typeof(*mppe_opt), opt);
+
+	_free(mppe_opt);
+}
+
+static int setup_mppe_key(int fd, int transmit, uint8_t *key)
+{
+	struct ppp_option_data data;
+	uint8_t buf[6 + 16];
+
+	memset(buf, 0, sizeof(buf));
+	buf[0] = CI_MPPE;
+	buf[1] = 6;
+	*(uint32_t*)(buf + 2) = htonl(MPPE_S | MPPE_H);
+	if (key)
+		memcpy(buf + 6, key, 16);
+
+	memset(&data, 0, sizeof(data));
+	data.ptr = buf;
+	data.length = sizeof(buf);
+	data.transmit = transmit;
+
+	if (ioctl(fd, PPPIOCSCOMPRESS, &data)) {
+		log_ppp_warn("mppe: MPPE requested but not supported by kernel\n");
+		return -1;
+	}
+
+	return 0;
+}
+
+static int decrease_mtu(struct ppp_t *ppp)
+{
+	struct ifreq ifr;
+
+	strcpy(ifr.ifr_name, ppp->ifname);
+
+	if (ioctl(sock_fd, SIOCGIFMTU, &ifr)) {
+		log_ppp_error("mppe: failed to get MTU: %s\n", strerror(errno));
+		return -1;
+	}
+
+	ifr.ifr_mtu -= MPPE_PAD;
+
+	if (ioctl(sock_fd, SIOCSIFMTU, &ifr)) {
+		log_ppp_error("mppe: failed to set MTU: %s\n", strerror(errno));
+		return -1;
+	}
+
+	return 0;
+}
+
+static int mppe_send_conf_req(struct ppp_ccp_t *ccp, struct ccp_option_t *opt, uint8_t *ptr)
+{
+	struct mppe_option_t *mppe_opt = container_of(opt,typeof(*mppe_opt),opt);
+	struct ccp_opt32_t *opt32 = (struct ccp_opt32_t*)ptr;
+
+	if (mppe_opt->mppe != -1)	{
+		opt32->hdr.id = CI_MPPE;
+		opt32->hdr.len = 6;
+		opt32->val = mppe_opt->mppe ? htonl(MPPE_S | MPPE_H) : 0;
+		
+		if (mppe_opt->mppe && setup_mppe_key(ccp->ppp->unit_fd, 0, mppe_opt->recv_key))
+			return 0;
+
+		return 6;
+	}
+	return 0;
+}
+
+static int mppe_recv_conf_req(struct ppp_ccp_t *ccp, struct ccp_option_t *opt, uint8_t *ptr)
+{
+	struct mppe_option_t *mppe_opt = container_of(opt, typeof(*mppe_opt), opt);
+	struct ccp_opt32_t *opt32 = (struct ccp_opt32_t *)ptr;
+
+	/*if (!ptr) {
+		if (mppe_opt->policy == 2)
+			return CCP_OPT_NAK;
+		return CCP_OPT_ACK;
+	}*/
+	
+	if (opt32->hdr.len != 6)
+		return CCP_OPT_REJ;
+
+	if (mppe_opt->policy == 2) {
+		if (ntohl(opt32->val) != (MPPE_S | MPPE_H))
+			return CCP_OPT_NAK;
+	} else if (mppe_opt->policy == 1) {
+		if (ntohl(opt32->val)  == (MPPE_S | MPPE_H))
+			mppe_opt->mppe = 1;
+		else if ((ntohl(opt32->val) & (MPPE_S | MPPE_H)) == (MPPE_S | MPPE_H)) {
+			mppe_opt->mppe = 1;
+			return CCP_OPT_NAK;
+		} else if (opt32->val) {
+			mppe_opt->mppe = 0;
+			return CCP_OPT_NAK;
+		} else
+			mppe_opt->mppe = 0;
+	} else
+		return CCP_OPT_REJ;
+	
+	if (mppe_opt->mppe) {
+		if (setup_mppe_key(ccp->ppp->unit_fd, 1, mppe_opt->send_key))
+			return CCP_OPT_REJ;
+
+		decrease_mtu(ccp->ppp);
+
+		log_ppp_debug(" (mppe enabled)");
+	}
+
+	return CCP_OPT_ACK;
+}
+
+static int mppe_recv_conf_rej(struct ppp_ccp_t *ccp, struct ccp_option_t *opt, uint8_t *ptr)
+{
+	struct mppe_option_t *mppe_opt = container_of(opt, typeof(*mppe_opt), opt);
+
+	if (mppe_opt->mppe != 2) {
+		mppe_opt->mppe = -1;
+		return 0;
+	}
+
+	return -1;
+}
+
+static int mppe_recv_conf_nak(struct ppp_ccp_t *ccp, struct ccp_option_t *opt, uint8_t *ptr)
+{
+	struct mppe_option_t *mppe_opt = container_of(opt, typeof(*mppe_opt), opt);
+	struct ccp_opt32_t *opt32 = (struct ccp_opt32_t *)ptr;
+
+	if (opt32->hdr.len != 6)
+		return -1;
+
+	if (mppe_opt->policy == 2) {
+		if (ntohl(opt32->val) == (MPPE_S | MPPE_H))
+			return -1;
+	} else if (mppe_opt->policy == 1) {
+		if ((ntohl(opt32->val) & (MPPE_S | MPPE_H)) == (MPPE_S | MPPE_H))
+			mppe_opt->mppe = 0;
+		else
+			mppe_opt->mppe = 1;
+	} else {
+		if (opt32->val == 0)
+			return -1;
+	}
+
+	return 0;
+}
+
+static void mppe_print(void (*print)(const char *fmt,...),struct ccp_option_t *opt, uint8_t *ptr)
+{
+	struct mppe_option_t *mppe_opt = container_of(opt, typeof(*mppe_opt), opt);
+	struct ccp_opt32_t *opt32 = (struct ccp_opt32_t *)ptr;
+	uint32_t bits;
+
+	if (ptr)
+		bits = ntohl(opt32->val);
+	else
+		if (mppe_opt->mppe)
+			bits = MPPE_S | MPPE_H;
+		else
+			bits = 0;
+
+	print("<mppe %sH %sM %sS %sL %sD %sC>",
+		bits & MPPE_H ? "+" : "-",
+		bits & MPPE_M ? "+" : "-",
+		bits & MPPE_S ? "+" : "-",
+		bits & MPPE_L ? "+" : "-",
+		bits & MPPE_D ? "+" : "-",
+		bits & MPPE_C ? "+" : "-" 
+	);
+}
+
+static void ev_mppe_keys(struct ev_mppe_keys_t *ev)
+{
+	struct mppe_option_t *mppe_opt = container_of(ccp_find_option(ev->ppp, &mppe_opt_hnd), typeof(*mppe_opt), opt);
+
+	if ((ev->type & 0x04) == 0) {
+		log_ppp_warn("mppe: 128-bit session keys not allowed, disabling mppe ...\n");
+		return;
+	}
+	
+	memcpy(mppe_opt->recv_key, ev->recv_key, 16);
+	memcpy(mppe_opt->send_key, ev->send_key, 16);
+	mppe_opt->policy = ev->policy;
+
+	if (ev->policy == 2)
+		mppe_opt->mppe = 1;
+}
+
+static void __init mppe_opt_init()
+{
+	ccp_option_register(&mppe_opt_hnd);
+	triton_event_register_handler(EV_MPPE_KEYS, (triton_event_func)ev_mppe_keys);
+}
+
diff --git a/accel-pppd/ppp/ipcp_opt_dns.c b/accel-pppd/ppp/ipcp_opt_dns.c
new file mode 100644
index 0000000..c177092
--- /dev/null
+++ b/accel-pppd/ppp/ipcp_opt_dns.c
@@ -0,0 +1,155 @@
+#include <stdlib.h>
+#include <string.h>
+#include <arpa/inet.h>
+
+#include "ppp.h"
+#include "ppp_ipcp.h"
+#include "log.h"
+#include "ipdb.h"
+
+#include "memdebug.h"
+
+static in_addr_t conf_dns1;
+static in_addr_t conf_dns2;
+
+static struct ipcp_option_t *dns1_init(struct ppp_ipcp_t *ipcp);
+static struct ipcp_option_t *dns2_init(struct ppp_ipcp_t *ipcp);
+static void dns_free(struct ppp_ipcp_t *ipcp, struct ipcp_option_t *opt);
+static int dns_send_conf_req(struct ppp_ipcp_t *ipcp, struct ipcp_option_t *opt, uint8_t *ptr);
+static int dns_send_conf_nak(struct ppp_ipcp_t *ipcp, struct ipcp_option_t *opt, uint8_t *ptr);
+static int dns_recv_conf_req(struct ppp_ipcp_t *ipcp, struct ipcp_option_t *opt, uint8_t *ptr);
+static void dns1_print(void (*print)(const char *fmt,...),struct ipcp_option_t*, uint8_t *ptr);
+static void dns2_print(void (*print)(const char *fmt,...),struct ipcp_option_t*, uint8_t *ptr);
+
+struct dns_option_t
+{
+	struct ipcp_option_t opt;
+	in_addr_t addr;
+};
+
+static struct ipcp_option_handler_t dns1_opt_hnd=
+{
+	.init=dns1_init,
+	.send_conf_req=dns_send_conf_req,
+	.send_conf_nak=dns_send_conf_nak,
+	.recv_conf_req=dns_recv_conf_req,
+	.free=dns_free,
+	.print=dns1_print,
+};
+static struct ipcp_option_handler_t dns2_opt_hnd=
+{
+	.init=dns2_init,
+	.send_conf_req=dns_send_conf_req,
+	.send_conf_nak=dns_send_conf_nak,
+	.recv_conf_req=dns_recv_conf_req,
+	.free=dns_free,
+	.print=dns2_print,
+};
+
+static struct ipcp_option_t *dns1_init(struct ppp_ipcp_t *ipcp)
+{
+	struct dns_option_t *dns_opt=_malloc(sizeof(*dns_opt));
+	memset(dns_opt,0,sizeof(*dns_opt));
+	dns_opt->opt.id=CI_DNS1;
+	dns_opt->opt.len=6;
+
+	return &dns_opt->opt;
+}
+
+static struct ipcp_option_t *dns2_init(struct ppp_ipcp_t *ipcp)
+{
+	struct dns_option_t *dns_opt=_malloc(sizeof(*dns_opt));
+	memset(dns_opt,0,sizeof(*dns_opt));
+	dns_opt->opt.id=CI_DNS2;
+	dns_opt->opt.len=6;
+
+	return &dns_opt->opt;
+}
+
+static void dns_free(struct ppp_ipcp_t *ipcp, struct ipcp_option_t *opt)
+{
+	struct dns_option_t *dns_opt=container_of(opt,typeof(*dns_opt),opt);
+
+	_free(dns_opt);
+}
+
+static int dns_send_conf_req(struct ppp_ipcp_t *ipcp, struct ipcp_option_t *opt, uint8_t *ptr)
+{
+	return 0;
+}
+
+static int dns_send_conf_nak(struct ppp_ipcp_t *ipcp, struct ipcp_option_t *opt, uint8_t *ptr)
+{
+	struct dns_option_t *dns_opt=container_of(opt,typeof(*dns_opt),opt);
+	struct ipcp_opt32_t *opt32=(struct ipcp_opt32_t*)ptr;
+	opt32->hdr.id=dns_opt->opt.id;
+	opt32->hdr.len=6;
+	opt32->val=dns_opt->addr;
+	return 6;
+}
+
+static int dns_recv_conf_req(struct ppp_ipcp_t *ipcp, struct ipcp_option_t *opt, uint8_t *ptr)
+{
+	struct dns_option_t *dns_opt=container_of(opt,typeof(*dns_opt),opt);
+	struct ipcp_opt32_t *opt32=(struct ipcp_opt32_t*)ptr;
+
+	if (opt32->hdr.len != 6)
+		return IPCP_OPT_REJ;
+
+	if (!dns_opt->addr)
+	{
+		if (dns_opt->opt.id == CI_DNS1 && conf_dns1) dns_opt->addr=conf_dns1;
+		else if (dns_opt->opt.id == CI_DNS2 && conf_dns2) dns_opt->addr=conf_dns2;
+		
+		if (!dns_opt->addr)
+		{
+			dns_opt->addr=opt32->val;
+			return IPCP_OPT_ACK;
+		}
+	}
+
+	if (dns_opt->addr==opt32->val)
+		return IPCP_OPT_ACK;
+		
+	return IPCP_OPT_NAK;
+}
+
+static void dns1_print(void (*print)(const char *fmt,...),struct ipcp_option_t *opt, uint8_t *ptr)
+{
+	struct dns_option_t *dns_opt=container_of(opt,typeof(*dns_opt),opt);
+	struct ipcp_opt32_t *opt32=(struct ipcp_opt32_t*)ptr;
+	struct in_addr in;
+
+	if (ptr) in.s_addr=opt32->val;
+	else in.s_addr=dns_opt->addr;
+	
+	print("<dns1 %s>",inet_ntoa(in));
+}
+
+static void dns2_print(void (*print)(const char *fmt,...),struct ipcp_option_t *opt, uint8_t *ptr)
+{
+	struct dns_option_t *dns_opt=container_of(opt,typeof(*dns_opt),opt);
+	struct ipcp_opt32_t *opt32=(struct ipcp_opt32_t*)ptr;
+	struct in_addr in;
+
+	if (ptr) in.s_addr=opt32->val;
+	else in.s_addr=dns_opt->addr;
+	
+	print("<dns2 %s>",inet_ntoa(in));
+}
+
+static void __init dns_opt_init()
+{
+	char *opt;
+	
+	opt = conf_get_opt("dns", "dns1");
+	if (opt)
+		conf_dns1 = inet_addr(opt);
+	
+	opt = conf_get_opt("dns", "dns2");
+	if (opt)
+		conf_dns2 = inet_addr(opt);
+	
+	ipcp_option_register(&dns1_opt_hnd);
+	ipcp_option_register(&dns2_opt_hnd);
+}
diff --git a/accel-pppd/ppp/ipcp_opt_ipaddr.c b/accel-pppd/ppp/ipcp_opt_ipaddr.c
new file mode 100644
index 0000000..334f425
--- /dev/null
+++ b/accel-pppd/ppp/ipcp_opt_ipaddr.c
@@ -0,0 +1,227 @@
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <errno.h>
+#include <arpa/inet.h>
+#include <sys/socket.h>
+#include <sys/ioctl.h>
+#include "linux_ppp.h"
+
+#include "ppp.h"
+#include "ppp_ipcp.h"
+#include "log.h"
+#include "ipdb.h"
+#include "iprange.h"
+#include "events.h"
+
+#include "memdebug.h"
+
+static int conf_check_exists;
+
+static struct ipcp_option_t *ipaddr_init(struct ppp_ipcp_t *ipcp);
+static void ipaddr_free(struct ppp_ipcp_t *ipcp, struct ipcp_option_t *opt);
+static int ipaddr_send_conf_req(struct ppp_ipcp_t *ipcp, struct ipcp_option_t *opt, uint8_t *ptr);
+static int ipaddr_send_conf_nak(struct ppp_ipcp_t *ipcp, struct ipcp_option_t *opt, uint8_t *ptr);
+static int ipaddr_recv_conf_req(struct ppp_ipcp_t *ipcp, struct ipcp_option_t *opt, uint8_t *ptr);
+//static int ipaddr_recv_conf_ack(struct ppp_ipcp_t *ipcp, struct ipcp_option_t *opt, uint8_t *ptr);
+static void ipaddr_print(void (*print)(const char *fmt,...),struct ipcp_option_t*, uint8_t *ptr);
+
+struct ipaddr_option_t
+{
+	struct ipcp_option_t opt;
+	struct ipdb_item_t *ip;
+	int started:1;
+};
+
+static struct ipcp_option_handler_t ipaddr_opt_hnd=
+{
+	.init=ipaddr_init,
+	.send_conf_req=ipaddr_send_conf_req,
+	.send_conf_nak=ipaddr_send_conf_nak,
+	.recv_conf_req=ipaddr_recv_conf_req,
+	.free=ipaddr_free,
+	.print=ipaddr_print,
+};
+
+static struct ipcp_option_t *ipaddr_init(struct ppp_ipcp_t *ipcp)
+{
+	struct ipaddr_option_t *ipaddr_opt=_malloc(sizeof(*ipaddr_opt));
+	memset(ipaddr_opt,0,sizeof(*ipaddr_opt));
+	ipaddr_opt->opt.id=CI_ADDR;
+	ipaddr_opt->opt.len=6;
+
+	return &ipaddr_opt->opt;
+}
+
+static void ipaddr_free(struct ppp_ipcp_t *ipcp, struct ipcp_option_t *opt)
+{
+	struct ipaddr_option_t *ipaddr_opt=container_of(opt,typeof(*ipaddr_opt),opt);
+
+	if (ipaddr_opt->ip)
+		ipdb_put(ipcp->ppp, ipaddr_opt->ip);
+
+	_free(ipaddr_opt);
+}
+
+static int check_exists(struct ppp_t *self_ppp, in_addr_t addr)
+{
+	struct ppp_t *ppp;
+	int r = 0;
+
+	pthread_rwlock_rdlock(&ppp_lock);
+	list_for_each_entry(ppp, &ppp_list, entry) {
+		if (!ppp->terminating && ppp->peer_ipaddr == addr && ppp != self_ppp) {
+			log_ppp_warn("ppp:ipcp: requested IP already assigned to %s\n", ppp->ifname);
+			r = 1;
+			break;
+		}
+	}
+	pthread_rwlock_unlock(&ppp_lock);
+
+	return r;
+}
+
+static int ipaddr_send_conf_req(struct ppp_ipcp_t *ipcp, struct ipcp_option_t *opt, uint8_t *ptr)
+{
+	struct ipaddr_option_t *ipaddr_opt=container_of(opt,typeof(*ipaddr_opt),opt);
+	struct ipcp_opt32_t *opt32=(struct ipcp_opt32_t*)ptr;
+	
+	if (!ipaddr_opt->ip) {
+		ipaddr_opt->ip = ipdb_get(ipcp->ppp);
+		if (!ipaddr_opt->ip) {
+			log_ppp_warn("ppp:ipcp: no free IP address\n");
+			return -1;
+		}
+	}
+	
+	if (iprange_tunnel_check(ipaddr_opt->ip->peer_addr)) {
+		log_ppp_warn("ppp:ipcp: to avoid kernel soft lockup requested IP cannot be assigned (%i.%i.%i.%i)\n",
+			ipaddr_opt->ip->peer_addr&0xff, 
+			(ipaddr_opt->ip->peer_addr >> 8)&0xff, 
+			(ipaddr_opt->ip->peer_addr >> 16)&0xff, 
+			(ipaddr_opt->ip->peer_addr >> 24)&0xff);
+		return -1;
+	}
+	
+	if (conf_check_exists && check_exists(ipcp->ppp, ipaddr_opt->ip->peer_addr))
+		return -1;
+	
+	opt32->hdr.id=CI_ADDR;
+	opt32->hdr.len=6;
+	opt32->val=ipaddr_opt->ip->addr;
+	return 6;
+}
+
+static int ipaddr_send_conf_nak(struct ppp_ipcp_t *ipcp, struct ipcp_option_t *opt, uint8_t *ptr)
+{
+	struct ipaddr_option_t *ipaddr_opt=container_of(opt,typeof(*ipaddr_opt),opt);
+	struct ipcp_opt32_t *opt32=(struct ipcp_opt32_t*)ptr;
+	opt32->hdr.id=CI_ADDR;
+	opt32->hdr.len=6;
+	opt32->val=ipaddr_opt->ip->peer_addr;
+	return 6;
+}
+
+static int ipaddr_recv_conf_req(struct ppp_ipcp_t *ipcp, struct ipcp_option_t *opt, uint8_t *ptr)
+{
+	struct ipaddr_option_t *ipaddr_opt = container_of(opt,typeof(*ipaddr_opt), opt);
+	struct ipcp_opt32_t *opt32 = (struct ipcp_opt32_t*)ptr;
+	struct ifreq ifr;
+	struct sockaddr_in addr;
+	struct npioctl np;
+
+	if (opt32->hdr.len != 6)
+		return IPCP_OPT_REJ;
+
+	if (ipaddr_opt->ip->peer_addr == opt32->val)
+		goto ack;
+		
+	/*if (!ipaddr_opt->peer_addr) {
+		ipaddr_opt->peer_addr = opt32->val;
+		goto ack;
+	}*/
+	
+	return IPCP_OPT_NAK;
+
+ack:
+	if (ipaddr_opt->started)
+		return IPCP_OPT_ACK;
+	
+	ipaddr_opt->started = 1;
+
+	ipcp->ppp->ipaddr = ipaddr_opt->ip->addr;
+	ipcp->ppp->peer_ipaddr = ipaddr_opt->ip->peer_addr;
+
+	triton_event_fire(EV_PPP_ACCT_START, ipcp->ppp);
+	if (ipcp->ppp->stop_time)
+		return IPCP_OPT_ACK;
+
+	triton_event_fire(EV_PPP_PRE_UP, ipcp->ppp);
+	if (ipcp->ppp->stop_time)
+		return IPCP_OPT_ACK;
+
+	memset(&ifr, 0, sizeof(ifr));
+	memset(&addr, 0, sizeof(addr));
+
+	strcpy(ifr.ifr_name, ipcp->ppp->ifname);
+
+	addr.sin_family = AF_INET;
+  addr.sin_addr.s_addr = ipaddr_opt->ip->addr;
+	memcpy(&ifr.ifr_addr,&addr,sizeof(addr));
+
+	if (ioctl(sock_fd, SIOCSIFADDR, &ifr))
+		log_ppp_error("ipcp: failed to set PA address: %s\n", strerror(errno));
+	
+  addr.sin_addr.s_addr = ipaddr_opt->ip->peer_addr;
+	memcpy(&ifr.ifr_dstaddr,&addr,sizeof(addr));
+	
+	if (ioctl(sock_fd, SIOCSIFDSTADDR, &ifr))
+		log_ppp_error("ipcp: failed to set remote PA address: %s\n", strerror(errno));
+
+	if (ioctl(sock_fd, SIOCGIFFLAGS, &ifr))
+		log_ppp_error("ipcp: failed to get interface flags: %s\n", strerror(errno));
+
+	ifr.ifr_flags |= IFF_UP | IFF_POINTOPOINT;
+
+	if (ioctl(sock_fd, SIOCSIFFLAGS, &ifr))
+		log_ppp_error("ipcp: failed to set interface flags: %s\n", strerror(errno));
+
+	np.protocol = PPP_IP;
+	np.mode = NPMODE_PASS;
+
+	if (ioctl(ipcp->ppp->unit_fd, PPPIOCSNPMODE, &np))
+		log_ppp_error("ipcp: failed to set NP mode: %s\n", strerror(errno));
+
+	return IPCP_OPT_ACK;
+}
+
+static void ipaddr_print(void (*print)(const char *fmt,...),struct ipcp_option_t *opt, uint8_t *ptr)
+{
+	struct ipaddr_option_t *ipaddr_opt=container_of(opt,typeof(*ipaddr_opt),opt);
+	struct ipcp_opt32_t *opt32=(struct ipcp_opt32_t*)ptr;
+	struct in_addr in = { .s_addr = 0, };
+
+	if (ptr)
+		in.s_addr = opt32->val;
+	else if (ipaddr_opt->ip)
+		in.s_addr = ipaddr_opt->ip->addr;
+	
+	print("<addr %s>",inet_ntoa(in));
+}
+
+static void load_config(void)
+{
+	const char *opt;
+
+	opt = conf_get_opt("ppp", "check-ip");
+	if (opt && atoi(opt) > 0)
+		conf_check_exists = 1;
+}
+
+static void __init ipaddr_opt_init()
+{
+	ipcp_option_register(&ipaddr_opt_hnd);
+	load_config();
+	triton_event_register_handler(EV_CONFIG_RELOAD, (triton_event_func)load_config);
+}
+
diff --git a/accel-pppd/ppp/lcp_opt_accomp.c b/accel-pppd/ppp/lcp_opt_accomp.c
new file mode 100644
index 0000000..241b0e0
--- /dev/null
+++ b/accel-pppd/ppp/lcp_opt_accomp.c
@@ -0,0 +1,106 @@
+#include <stdlib.h>
+#include <string.h>
+#include <arpa/inet.h>
+
+#include "ppp.h"
+#include "ppp_lcp.h"
+#include "log.h"
+
+#include "memdebug.h"
+
+static struct lcp_option_t *accomp_init(struct ppp_lcp_t *lcp);
+static void accomp_free(struct ppp_lcp_t *lcp, struct lcp_option_t *opt);
+static int accomp_send_conf_req(struct ppp_lcp_t *lcp, struct lcp_option_t *opt, uint8_t *ptr);
+static int accomp_send_conf_nak(struct ppp_lcp_t *lcp, struct lcp_option_t *opt, uint8_t *ptr);
+static int accomp_recv_conf_req(struct ppp_lcp_t *lcp, struct lcp_option_t *opt, uint8_t *ptr);
+static void accomp_print(void (*print)(const char *fmt,...),struct lcp_option_t*, uint8_t *ptr);
+
+struct accomp_option_t
+{
+	struct lcp_option_t opt;
+	int accomp; // 0 - disabled, 1 - enabled, 2 - allow,disabled, 3 - allow,enabled
+	int require;
+};
+
+static struct lcp_option_handler_t accomp_opt_hnd=
+{
+	.init=accomp_init,
+	.send_conf_req=accomp_send_conf_req,
+	.send_conf_nak=accomp_send_conf_nak,
+	.recv_conf_req=accomp_recv_conf_req,
+	.free=accomp_free,
+	.print=accomp_print,
+};
+
+static struct lcp_option_t *accomp_init(struct ppp_lcp_t *lcp)
+{
+	struct accomp_option_t *accomp_opt=_malloc(sizeof(*accomp_opt));
+	memset(accomp_opt,0,sizeof(*accomp_opt));
+	accomp_opt->accomp=0;
+	accomp_opt->opt.id=CI_ACCOMP;
+	accomp_opt->opt.len=2;
+
+	return &accomp_opt->opt;
+}
+
+static void accomp_free(struct ppp_lcp_t *lcp, struct lcp_option_t *opt)
+{
+	struct accomp_option_t *accomp_opt=container_of(opt,typeof(*accomp_opt),opt);
+
+	_free(accomp_opt);
+}
+
+static int accomp_send_conf_req(struct ppp_lcp_t *lcp, struct lcp_option_t *opt, uint8_t *ptr)
+{
+	struct accomp_option_t *accomp_opt=container_of(opt,typeof(*accomp_opt),opt);
+	struct lcp_opt_hdr_t *opt0=(struct lcp_opt_hdr_t*)ptr;
+	if (accomp_opt->accomp==1 || accomp_opt->accomp==3)
+	{
+		opt0->id=CI_ACCOMP;
+		opt0->len=2;
+		return 2;
+	}
+	return 0;
+}
+
+static int accomp_send_conf_nak(struct ppp_lcp_t *lcp, struct lcp_option_t *opt, uint8_t *ptr)
+{
+	struct accomp_option_t *accomp_opt=container_of(opt,typeof(*accomp_opt),opt);
+	struct lcp_opt_hdr_t *opt0=(struct lcp_opt_hdr_t*)ptr;
+	opt0->id=CI_ACCOMP;
+	opt0->len=2;
+	return 2;
+}
+
+static int accomp_recv_conf_req(struct ppp_lcp_t *lcp, struct lcp_option_t *opt, uint8_t *ptr)
+{
+	struct accomp_option_t *accomp_opt=container_of(opt,typeof(*accomp_opt),opt);
+	struct lcp_opt_hdr_t *opt0=(struct lcp_opt_hdr_t*)ptr;
+
+	/*if (!ptr) {
+		if (accomp_opt->require)
+			return LCP_OPT_NAK;
+		accomp_opt->accomp=0;
+		return LCP_OPT_ACK;
+	}*/
+
+	if (opt0->len != 2)
+		return LCP_OPT_REJ;
+
+	if (accomp_opt->accomp>0)
+	{
+		accomp_opt->accomp=1;
+		return LCP_OPT_ACK;
+	}else return LCP_OPT_REJ;
+}
+
+static void accomp_print(void (*print)(const char *fmt,...),struct lcp_option_t *opt, uint8_t *ptr)
+{
+	print("<accomp>");
+}
+
+static void __init accomp_opt_init()
+{
+	lcp_option_register(&accomp_opt_hnd);
+}
+
diff --git a/accel-pppd/ppp/lcp_opt_magic.c b/accel-pppd/ppp/lcp_opt_magic.c
new file mode 100644
index 0000000..4a61ef9
--- /dev/null
+++ b/accel-pppd/ppp/lcp_opt_magic.c
@@ -0,0 +1,91 @@
+#include <stdlib.h>
+#include <string.h>
+#include <arpa/inet.h>
+
+#include "ppp.h"
+#include "ppp_lcp.h"
+#include "log.h"
+
+#include "memdebug.h"
+
+static struct lcp_option_t *magic_init(struct ppp_lcp_t *lcp);
+static void magic_free(struct ppp_lcp_t *lcp, struct lcp_option_t *opt);
+static int magic_send_conf_req(struct ppp_lcp_t *lcp, struct lcp_option_t *opt, uint8_t *ptr);
+static int magic_recv_conf_req(struct ppp_lcp_t *lcp, struct lcp_option_t *opt, uint8_t *ptr);
+static void magic_print(void (*print)(const char *fmt,...),struct lcp_option_t*, uint8_t *ptr);
+
+struct magic_option_t
+{
+	struct lcp_option_t opt;
+	int magic;
+};
+
+static struct lcp_option_handler_t magic_opt_hnd=
+{
+	.init=magic_init,
+	.send_conf_req=magic_send_conf_req,
+	.recv_conf_req=magic_recv_conf_req,
+	.free=magic_free,
+	.print=magic_print,
+};
+
+static struct lcp_option_t *magic_init(struct ppp_lcp_t *lcp)
+{
+	struct magic_option_t *magic_opt=_malloc(sizeof(*magic_opt));
+	memset(magic_opt,0,sizeof(*magic_opt));
+	magic_opt->magic=random();
+	magic_opt->opt.id=CI_MAGIC;
+	magic_opt->opt.len=6;
+
+	lcp->magic = magic_opt->magic;
+
+	return &magic_opt->opt;
+}
+
+static void magic_free(struct ppp_lcp_t *lcp, struct lcp_option_t *opt)
+{
+	struct magic_option_t *magic_opt=container_of(opt,typeof(*magic_opt),opt);
+
+	_free(magic_opt);
+}
+
+static int magic_send_conf_req(struct ppp_lcp_t *lcp, struct lcp_option_t *opt, uint8_t *ptr)
+{
+	struct magic_option_t *magic_opt=container_of(opt,typeof(*magic_opt),opt);
+	struct lcp_opt32_t *opt32=(struct lcp_opt32_t*)ptr;
+	opt32->hdr.id=CI_MAGIC;
+	opt32->hdr.len=6;
+	opt32->val=htonl(magic_opt->magic);
+	return 6;
+}
+
+static int magic_recv_conf_req(struct ppp_lcp_t *lcp, struct lcp_option_t *opt, uint8_t *ptr)
+{
+	struct magic_option_t *magic_opt=container_of(opt,typeof(*magic_opt),opt);
+	struct lcp_opt32_t *opt32=(struct lcp_opt32_t*)ptr;
+
+	/*if (!ptr)
+		return LCP_OPT_NAK;*/
+	
+	if (opt32->hdr.len != 6)
+		return LCP_OPT_REJ;
+
+	if (magic_opt->magic==ntohl(opt32->val))
+	{
+		log_ppp_error("loop detected");
+		return -1;
+	}
+	return LCP_OPT_ACK;
+}
+
+static void magic_print(void (*print)(const char *fmt,...),struct lcp_option_t *opt, uint8_t *ptr)
+{
+	struct magic_option_t *magic_opt=container_of(opt,typeof(*magic_opt),opt);
+
+	print("<magic %04x>",magic_opt->magic);
+}
+
+static void __init magic_opt_init()
+{
+	lcp_option_register(&magic_opt_hnd);
+}
diff --git a/accel-pppd/ppp/lcp_opt_mru.c b/accel-pppd/ppp/lcp_opt_mru.c
new file mode 100644
index 0000000..78e06b5
--- /dev/null
+++ b/accel-pppd/ppp/lcp_opt_mru.c
@@ -0,0 +1,195 @@
+#include <stdlib.h>
+#include <string.h>
+#include <errno.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <sys/socket.h>
+#include <arpa/inet.h>
+#include <sys/ioctl.h>
+#include "linux_ppp.h"
+
+#include "ppp.h"
+#include "ppp_lcp.h"
+#include "log.h"
+#include "events.h"
+
+#include "memdebug.h"
+
+static int conf_mtu;
+static int conf_mru;
+static int conf_min_mtu = 100;
+static int conf_max_mtu = 1500;
+
+static struct lcp_option_t *mru_init(struct ppp_lcp_t *lcp);
+static void mru_free(struct ppp_lcp_t *lcp, struct lcp_option_t *opt);
+static int mru_send_conf_req(struct ppp_lcp_t *lcp, struct lcp_option_t *opt, uint8_t *ptr);
+static int mru_send_conf_nak(struct ppp_lcp_t *lcp, struct lcp_option_t *opt, uint8_t *ptr);
+static int mru_recv_conf_req(struct ppp_lcp_t *lcp, struct lcp_option_t *opt, uint8_t *ptr);
+static int mru_recv_conf_ack(struct ppp_lcp_t *lcp, struct lcp_option_t *opt, uint8_t *ptr);
+static int mru_recv_conf_nak(struct ppp_lcp_t *lcp, struct lcp_option_t *opt, uint8_t *ptr);
+static void mru_print(void (*print)(const char *fmt,...),struct lcp_option_t*, uint8_t *ptr);
+
+struct mru_option_t
+{
+	struct lcp_option_t opt;
+	int mru;
+	int mtu;
+	int naked:1;
+};
+
+static struct lcp_option_handler_t mru_opt_hnd=
+{
+	.init=mru_init,
+	.send_conf_req=mru_send_conf_req,
+	.send_conf_nak=mru_send_conf_nak,
+	.recv_conf_req=mru_recv_conf_req,
+	.recv_conf_ack=mru_recv_conf_ack,
+	.recv_conf_nak=mru_recv_conf_nak,
+	.free=mru_free,
+	.print=mru_print,
+};
+
+static struct lcp_option_t *mru_init(struct ppp_lcp_t *lcp)
+{
+	struct mru_option_t *mru_opt=_malloc(sizeof(*mru_opt));
+	memset(mru_opt, 0, sizeof(*mru_opt));
+	mru_opt->mru = (conf_mru && conf_mru <= lcp->ppp->ctrl->max_mtu) ? conf_mru : lcp->ppp->ctrl->max_mtu;
+	if (mru_opt->mru > conf_max_mtu)
+		mru_opt->mru = conf_max_mtu;
+	mru_opt->mtu = (conf_mtu && conf_mtu <= lcp->ppp->ctrl->max_mtu) ? conf_mtu : lcp->ppp->ctrl->max_mtu;
+	if (mru_opt->mtu > conf_max_mtu)
+		mru_opt->mtu = conf_max_mtu;
+	mru_opt->opt.id = CI_MRU;
+	mru_opt->opt.len = 4;
+
+	return &mru_opt->opt;
+}
+
+static void mru_free(struct ppp_lcp_t *lcp, struct lcp_option_t *opt)
+{
+	struct mru_option_t *mru_opt = container_of(opt, typeof(*mru_opt), opt);
+
+	_free(mru_opt);
+}
+
+static int mru_send_conf_req(struct ppp_lcp_t *lcp, struct lcp_option_t *opt, uint8_t *ptr)
+{
+	struct mru_option_t *mru_opt = container_of(opt,typeof(*mru_opt),opt);
+	struct lcp_opt16_t *opt16 = (struct lcp_opt16_t*)ptr;
+
+	if (mru_opt->naked)
+		return 0;
+
+	opt16->hdr.id = CI_MRU;
+	opt16->hdr.len = 4;
+	opt16->val = htons(mru_opt->mru);
+	return 4;
+}
+
+static int mru_send_conf_nak(struct ppp_lcp_t *lcp, struct lcp_option_t *opt, uint8_t *ptr)
+{
+	struct mru_option_t *mru_opt = container_of(opt,typeof(*mru_opt),opt);
+	struct lcp_opt16_t *opt16 = (struct lcp_opt16_t*)ptr;
+	opt16->hdr.id = CI_MRU;
+	opt16->hdr.len = 4;
+	opt16->val = htons(mru_opt->mtu);
+	return 4;
+}
+
+static int mru_recv_conf_req(struct ppp_lcp_t *lcp, struct lcp_option_t *opt, uint8_t *ptr)
+{
+	struct mru_option_t *mru_opt = container_of(opt,typeof(*mru_opt),opt);
+	struct lcp_opt16_t *opt16 = (struct lcp_opt16_t*)ptr;
+
+	/*if (!ptr)
+		return LCP_OPT_NAK;*/
+	
+	if (opt16->hdr.len != 4)
+		return LCP_OPT_REJ;
+
+	if (ntohs(opt16->val) < conf_min_mtu || ntohs(opt16->val) > lcp->ppp->ctrl->max_mtu || ntohs(opt16->val) > conf_max_mtu)
+		return LCP_OPT_NAK;
+
+	mru_opt->mtu = ntohs(opt16->val);
+	return LCP_OPT_ACK;
+}
+
+static int mru_recv_conf_ack(struct ppp_lcp_t *lcp, struct lcp_option_t *opt, uint8_t *ptr)
+{
+	struct mru_option_t *mru_opt = container_of(opt,typeof(*mru_opt), opt);
+	struct ifreq ifr = {
+		.ifr_mtu = mru_opt->mtu,
+	};
+
+	strcpy(ifr.ifr_name, lcp->ppp->ifname);
+
+	if (ioctl(lcp->ppp->unit_fd, PPPIOCSMRU, &mru_opt->mru))
+		log_ppp_error("lcp:mru: failed to set MRU: %s\n", strerror(errno));
+
+	if (ioctl(sock_fd, SIOCSIFMTU, &ifr))
+		log_ppp_error("lcp:mru: failed to set MTU: %s\n", strerror(errno));
+	
+	return 0;
+}
+
+static int mru_recv_conf_nak(struct ppp_lcp_t *lcp, struct lcp_option_t *opt, uint8_t *ptr)
+{
+	struct mru_option_t *mru_opt = container_of(opt,typeof(*mru_opt), opt);
+	mru_opt->naked = 1;
+	return 0;
+}
+
+static void mru_print(void (*print)(const char *fmt,...), struct lcp_option_t *opt, uint8_t *ptr)
+{
+	struct mru_option_t *mru_opt = container_of(opt, typeof(*mru_opt), opt);
+	struct lcp_opt16_t *opt16 = (struct lcp_opt16_t*)ptr;
+
+	if (ptr)
+		print("<mru %i>",ntohs(opt16->val));
+	else
+		print("<mru %i>",mru_opt->mru);
+}
+
+static void load_config(void)
+{
+	char *opt;
+
+	opt = conf_get_opt("ppp", "mtu");
+	if (opt && atoi(opt) > 0)
+		conf_mtu = atoi(opt);
+
+	opt = conf_get_opt("ppp", "mru");
+	if (opt && atoi(opt) > 0)
+		conf_mru = atoi(opt);
+
+	opt = conf_get_opt("ppp", "min-mtu");
+	if (opt && atoi(opt) > 0)
+		conf_min_mtu = atoi(opt);
+	
+	opt = conf_get_opt("ppp", "max-mtu");
+	if (opt && atoi(opt) > 0)
+		conf_max_mtu = atoi(opt);
+	
+	if (conf_min_mtu > conf_mru) {
+		log_emerg("min-mtu cann't be greater then mtu/mru\n");
+		conf_min_mtu = conf_mru;
+	}
+
+	if (conf_min_mtu > 1500) {
+		log_emerg("min-mtu cann't be greater then 1500\n");
+		conf_min_mtu = 1500;
+	}
+
+	if (conf_mru > 1500 || conf_mtu > 1500) {
+		log_emerg("mtu/mru cann't be greater then 1500\n");
+		conf_mru = 1500;
+	}
+}
+
+static void __init mru_opt_init()
+{
+	load_config();
+	lcp_option_register(&mru_opt_hnd);
+	triton_event_register_handler(EV_CONFIG_RELOAD, (triton_event_func)load_config);
+}
+
diff --git a/accel-pppd/ppp/lcp_opt_pcomp.c b/accel-pppd/ppp/lcp_opt_pcomp.c
new file mode 100644
index 0000000..1f8532b
--- /dev/null
+++ b/accel-pppd/ppp/lcp_opt_pcomp.c
@@ -0,0 +1,106 @@
+#include <stdlib.h>
+#include <string.h>
+#include <arpa/inet.h>
+
+#include "ppp.h"
+#include "ppp_lcp.h"
+#include "log.h"
+
+#include "memdebug.h"
+
+static struct lcp_option_t *pcomp_init(struct ppp_lcp_t *lcp);
+static void pcomp_free(struct ppp_lcp_t *lcp, struct lcp_option_t *opt);
+static int pcomp_send_conf_req(struct ppp_lcp_t *lcp, struct lcp_option_t *opt, uint8_t *ptr);
+static int pcomp_send_conf_nak(struct ppp_lcp_t *lcp, struct lcp_option_t *opt, uint8_t *ptr);
+static int pcomp_recv_conf_req(struct ppp_lcp_t *lcp, struct lcp_option_t *opt, uint8_t *ptr);
+static void pcomp_print(void (*print)(const char *fmt,...),struct lcp_option_t*, uint8_t *ptr);
+
+struct pcomp_option_t
+{
+	struct lcp_option_t opt;
+	int pcomp; // 0 - disabled, 1 - enabled, 2 - allow,disabled, 3 - allow,enabled
+	int require;
+};
+
+static struct lcp_option_handler_t pcomp_opt_hnd=
+{
+	.init=pcomp_init,
+	.send_conf_req=pcomp_send_conf_req,
+	.send_conf_nak=pcomp_send_conf_nak,
+	.recv_conf_req=pcomp_recv_conf_req,
+	.free=pcomp_free,
+	.print=pcomp_print,
+};
+
+static struct lcp_option_t *pcomp_init(struct ppp_lcp_t *lcp)
+{
+	struct pcomp_option_t *pcomp_opt=_malloc(sizeof(*pcomp_opt));
+	memset(pcomp_opt,0,sizeof(*pcomp_opt));
+	pcomp_opt->pcomp=0;
+	pcomp_opt->opt.id=CI_PCOMP;
+	pcomp_opt->opt.len=2;
+
+	return &pcomp_opt->opt;
+}
+
+static void pcomp_free(struct ppp_lcp_t *lcp, struct lcp_option_t *opt)
+{
+	struct pcomp_option_t *pcomp_opt=container_of(opt,typeof(*pcomp_opt),opt);
+
+	_free(pcomp_opt);
+}
+
+static int pcomp_send_conf_req(struct ppp_lcp_t *lcp, struct lcp_option_t *opt, uint8_t *ptr)
+{
+	struct pcomp_option_t *pcomp_opt=container_of(opt,typeof(*pcomp_opt),opt);
+	struct lcp_opt_hdr_t *opt0=(struct lcp_opt_hdr_t*)ptr;
+	if (pcomp_opt->pcomp==1 || pcomp_opt->pcomp==3)
+	{
+		opt0->id=CI_PCOMP;
+		opt0->len=2;
+		return 2;
+	}
+	return 0;
+}
+
+static int pcomp_send_conf_nak(struct ppp_lcp_t *lcp, struct lcp_option_t *opt, uint8_t *ptr)
+{
+	struct pcomp_option_t *pcomp_opt=container_of(opt,typeof(*pcomp_opt),opt);
+	struct lcp_opt_hdr_t *opt0=(struct lcp_opt_hdr_t*)ptr;
+	opt0->id=CI_PCOMP;
+	opt0->len=2;
+	return 2;
+}
+
+static int pcomp_recv_conf_req(struct ppp_lcp_t *lcp, struct lcp_option_t *opt, uint8_t *ptr)
+{
+	struct pcomp_option_t *pcomp_opt=container_of(opt,typeof(*pcomp_opt),opt);
+	struct lcp_opt_hdr_t *opt0=(struct lcp_opt_hdr_t*)ptr;
+
+	/*if (!ptr) {
+		if (pcomp_opt->require)
+			return LCP_OPT_NAK;
+		pcomp_opt->pcomp=0;
+		return LCP_OPT_ACK;
+	}*/
+	
+	if (opt0->len != 2)
+		return LCP_OPT_REJ;
+
+	if (pcomp_opt->pcomp>0)
+	{
+		pcomp_opt->pcomp=1;
+		return LCP_OPT_ACK;
+	}else return LCP_OPT_REJ;
+}
+
+static void pcomp_print(void (*print)(const char *fmt,...),struct lcp_option_t *opt, uint8_t *ptr)
+{
+	print("<pcomp>");
+}
+
+static void __init pcomp_opt_init()
+{
+	lcp_option_register(&pcomp_opt_hnd);
+}
+
diff --git a/accel-pppd/ppp/ppp.c b/accel-pppd/ppp/ppp.c
new file mode 100644
index 0000000..f578e8e
--- /dev/null
+++ b/accel-pppd/ppp/ppp.c
@@ -0,0 +1,681 @@
+#include <stdio.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <stdint.h>
+#include <string.h>
+#include <errno.h>
+#include <sys/ioctl.h>
+#include <arpa/inet.h>
+#include <features.h>
+#include <signal.h>
+#include "linux_ppp.h"
+
+#include <openssl/md5.h>
+
+#include "triton.h"
+
+#include "events.h"
+#include "ppp.h"
+#include "ppp_fsm.h"
+#include "log.h"
+#include "spinlock.h"
+
+#include "memdebug.h"
+
+int __export conf_ppp_verbose;
+static int conf_sid_ucase;
+
+pthread_rwlock_t __export ppp_lock = PTHREAD_RWLOCK_INITIALIZER;
+__export LIST_HEAD(ppp_list);
+
+static LIST_HEAD(layers);
+int __export sock_fd;
+
+int __export ppp_shutdown;
+
+static unsigned long long seq;
+#if __WORDSIZE == 32
+static spinlock_t seq_lock;
+#endif
+
+
+struct ppp_stat_t ppp_stat;
+
+struct layer_node_t
+{
+	struct list_head entry;
+	int order;
+	struct list_head items;
+};
+
+static int ppp_chan_read(struct triton_md_handler_t*);
+static int ppp_unit_read(struct triton_md_handler_t*);
+static void init_layers(struct ppp_t *);
+static void _free_layers(struct ppp_t *);
+static void start_first_layer(struct ppp_t *);
+
+void __export ppp_init(struct ppp_t *ppp)
+{
+	memset(ppp,0,sizeof(*ppp));
+	INIT_LIST_HEAD(&ppp->layers);
+	INIT_LIST_HEAD(&ppp->chan_handlers);
+	INIT_LIST_HEAD(&ppp->unit_handlers);
+	INIT_LIST_HEAD(&ppp->pd_list);
+}
+
+static void _free_ppp(struct ppp_t *ppp)
+{
+	if (ppp->chan_buf)
+		free(ppp->chan_buf);
+	if (ppp->unit_buf)
+		_free(ppp->unit_buf);
+	if (ppp->username)
+		_free(ppp->username);
+}
+
+static void generate_sessionid(struct ppp_t *ppp)
+{
+	unsigned long long sid;
+
+#if __WORDSIZE == 32
+	spin_lock(&seq_lock);
+	sid = ++seq;
+	spin_unlock(&seq_lock);
+#else
+	sid = __sync_add_and_fetch(&seq, 1);
+#endif
+
+	if (conf_sid_ucase)
+		sprintf(ppp->sessionid, "%016llX", sid);
+	else
+		sprintf(ppp->sessionid, "%016llx", sid);
+}
+
+int __export establish_ppp(struct ppp_t *ppp)
+{
+	/* Open an instance of /dev/ppp and connect the channel to it */
+	if (ioctl(ppp->fd, PPPIOCGCHAN, &ppp->chan_idx) == -1) {
+		log_ppp_error("ioctl(PPPIOCGCHAN): %s\n", strerror(errno));
+		return -1;
+	}
+
+	ppp->chan_fd = open("/dev/ppp", O_RDWR);
+	if (ppp->chan_fd < 0) {
+		log_ppp_error("open(chan) /dev/ppp: %s\n", strerror(errno));
+		return -1;
+	}
+
+	if (ioctl(ppp->chan_fd, PPPIOCATTCHAN, &ppp->chan_idx) < 0) {
+		log_ppp_error("ioctl(PPPIOCATTCHAN): %s\n", strerror(errno));
+		goto exit_close_chan;
+	}
+
+	ppp->unit_fd = open("/dev/ppp", O_RDWR);
+	if (ppp->unit_fd < 0) {
+		log_ppp_error("open(unit) /dev/ppp: %s\n", strerror(errno));
+		goto exit_close_chan;
+	}
+
+	ppp->unit_idx = -1;
+	if (ioctl(ppp->unit_fd, PPPIOCNEWUNIT, &ppp->unit_idx) < 0) {
+		log_ppp_error("ioctl(PPPIOCNEWUNIT): %s\n", strerror(errno));
+		goto exit_close_unit;
+	}
+
+  if (ioctl(ppp->chan_fd, PPPIOCCONNECT, &ppp->unit_idx) < 0) {
+		log_ppp_error("ioctl(PPPIOCCONNECT): %s\n", strerror(errno));
+		goto exit_close_unit;
+	}
+
+	if (fcntl(ppp->chan_fd, F_SETFL, O_NONBLOCK)) {
+		log_ppp_error("ppp: cann't to set nonblocking mode: %s\n", strerror(errno));
+		goto exit_close_unit;
+	}
+	
+	if (fcntl(ppp->unit_fd, F_SETFL, O_NONBLOCK)) {
+		log_ppp_error("ppp: cann't to set nonblocking mode: %s\n", strerror(errno));
+		goto exit_close_unit;
+	}
+
+	ppp->start_time = time(NULL);
+	generate_sessionid(ppp);
+	sprintf(ppp->ifname, "ppp%i", ppp->unit_idx);
+
+	log_ppp_info1("connect: %s <--> %s(%s)\n", ppp->ifname, ppp->ctrl->name, ppp->chan_name);
+	
+	init_layers(ppp);
+
+	if (list_empty(&ppp->layers)) {
+		log_ppp_error("no layers to start\n");
+		goto exit_close_unit;
+	}
+
+	ppp->chan_buf = _malloc(PPP_MRU);
+	ppp->unit_buf = _malloc(PPP_MRU);
+
+	ppp->chan_hnd.fd = ppp->chan_fd;
+	ppp->chan_hnd.read = ppp_chan_read;
+	ppp->unit_hnd.fd = ppp->unit_fd;
+	ppp->unit_hnd.read = ppp_unit_read;
+	triton_md_register_handler(ppp->ctrl->ctx, &ppp->chan_hnd);
+	triton_md_register_handler(ppp->ctrl->ctx, &ppp->unit_hnd);
+	
+	triton_md_enable_handler(&ppp->chan_hnd, MD_MODE_READ);
+	triton_md_enable_handler(&ppp->unit_hnd, MD_MODE_READ);
+
+	ppp->state = PPP_STATE_STARTING;
+	__sync_add_and_fetch(&ppp_stat.starting, 1);
+
+	pthread_rwlock_wrlock(&ppp_lock);
+	list_add_tail(&ppp->entry, &ppp_list);
+	pthread_rwlock_unlock(&ppp_lock);
+
+	log_ppp_debug("ppp established\n");
+
+	triton_event_fire(EV_PPP_STARTING, ppp);
+	
+	start_first_layer(ppp);
+
+	return 0;
+
+exit_close_unit:
+	close(ppp->unit_fd);
+exit_close_chan:
+	close(ppp->chan_fd);
+
+	_free_ppp(ppp);
+
+	return -1;
+}
+
+static void destablish_ppp(struct ppp_t *ppp)
+{
+	pthread_rwlock_wrlock(&ppp_lock);
+	list_del(&ppp->entry);
+	pthread_rwlock_unlock(&ppp_lock);
+
+	switch (ppp->state) {
+		case PPP_STATE_ACTIVE:
+			__sync_sub_and_fetch(&ppp_stat.active, 1);
+			break;
+		case PPP_STATE_STARTING:
+			__sync_sub_and_fetch(&ppp_stat.starting, 1);
+			break;
+		case PPP_STATE_FINISHING:
+			__sync_sub_and_fetch(&ppp_stat.finishing, 1);
+			break;
+	}
+
+	triton_md_unregister_handler(&ppp->chan_hnd);
+	triton_md_unregister_handler(&ppp->unit_hnd);
+	
+	close(ppp->unit_fd);
+	close(ppp->chan_fd);
+	close(ppp->fd);
+
+	ppp->unit_fd = -1;
+	ppp->chan_fd = -1;
+	ppp->fd = -1;
+
+	_free(ppp->unit_buf);
+	_free(ppp->chan_buf);
+
+	_free_layers(ppp);
+	
+	ppp->terminated = 1;
+	
+	log_ppp_debug("ppp destablished\n");
+
+	triton_event_fire(EV_PPP_FINISHED, ppp);
+	ppp->ctrl->finished(ppp);
+
+	if (ppp->username) {
+		_free(ppp->username);
+		ppp->username = NULL;
+	}
+	
+	if (ppp_shutdown && !ppp_stat.starting && !ppp_stat.active && !ppp_stat.finishing)
+		kill(getpid(), SIGTERM);
+}
+
+/*void print_buf(uint8_t *buf, int size)
+{
+	int i;
+	for(i=0;i<size;i++)
+		printf("%x ",buf[i]);
+	printf("\n");
+}*/
+
+int __export ppp_chan_send(struct ppp_t *ppp, void *data, int size)
+{
+	int n;
+
+	//printf("ppp_chan_send: ");
+	//print_buf((uint8_t*)data,size);
+	
+	n = write(ppp->chan_fd,data,size);
+	if (n < size)
+		log_ppp_error("ppp_chan_send: short write %i, excpected %i\n", n, size);
+	return n;
+}
+
+int __export ppp_unit_send(struct ppp_t *ppp, void *data, int size)
+{
+	int n;
+
+	//printf("ppp_unit_send: ");
+	//print_buf((uint8_t*)data,size);
+	
+	n=write(ppp->unit_fd, data, size);
+	if (n < size)
+		log_ppp_error("ppp_unit_send: short write %i, excpected %i\n",n,size);
+	return n;
+}
+
+static int ppp_chan_read(struct triton_md_handler_t *h)
+{
+	struct ppp_t *ppp = container_of(h, typeof(*ppp), chan_hnd);
+	struct ppp_handler_t *ppp_h;
+	uint16_t proto;
+
+	while(1) {
+cont:
+		ppp->chan_buf_size = read(h->fd, ppp->chan_buf, PPP_MRU);
+		if (ppp->chan_buf_size < 0) {
+			if (errno == EAGAIN)
+				return 0;
+			log_ppp_error("ppp_chan_read: %s\n", strerror(errno));
+			return 0;
+		}
+
+		//printf("ppp_chan_read: ");
+		//print_buf(ppp->chan_buf,ppp->chan_buf_size);
+		if (ppp->chan_buf_size == 0) {
+			ppp_terminate(ppp, 1, TERM_NAS_ERROR);
+			return 1;
+		}
+
+		if (ppp->chan_buf_size < 2) {
+			log_ppp_error("ppp_chan_read: short read %i\n", ppp->chan_buf_size);
+			continue;
+		}
+
+		proto = ntohs(*(uint16_t*)ppp->chan_buf);
+		list_for_each_entry(ppp_h, &ppp->chan_handlers, entry) {
+			if (ppp_h->proto == proto) {
+				ppp_h->recv(ppp_h);
+				if (ppp->chan_fd == -1) {
+					ppp->ctrl->finished(ppp);
+					return 1;
+				}
+				goto cont;
+			}
+		}
+
+		lcp_send_proto_rej(ppp, proto);
+		//log_ppp_warn("ppp_chan_read: discarding unknown packet %x\n", proto);
+	}
+}
+
+static int ppp_unit_read(struct triton_md_handler_t *h)
+{
+	struct ppp_t *ppp = container_of(h, typeof(*ppp), unit_hnd);
+	struct ppp_handler_t *ppp_h;
+	uint16_t proto;
+
+	while (1) {
+cont:
+		ppp->unit_buf_size = read(h->fd, ppp->unit_buf, PPP_MRU);
+		if (ppp->unit_buf_size < 0) {
+			if (errno == EAGAIN)
+				return 0;
+			log_ppp_error("ppp_unit_read: %s\n",strerror(errno));
+			return 0;
+		}
+
+		md_check(ppp->unit_buf);
+		//printf("ppp_unit_read: ");
+		//print_buf(ppp->unit_buf,ppp->unit_buf_size);
+
+		if (ppp->unit_buf_size == 0) {
+			ppp_terminate(ppp, 1, TERM_NAS_ERROR);
+			return 1;
+		}
+
+		if (ppp->unit_buf_size < 2) {
+			log_ppp_error("ppp_unit_read: short read %i\n", ppp->unit_buf_size);
+			continue;
+		}
+
+		proto=ntohs(*(uint16_t*)ppp->unit_buf);
+		list_for_each_entry(ppp_h, &ppp->unit_handlers, entry) {
+			if (ppp_h->proto == proto) {
+				ppp_h->recv(ppp_h);
+				if (ppp->unit_fd == -1) {
+					ppp->ctrl->finished(ppp);
+					return 1;
+				}
+				goto cont;
+			}
+		}
+		lcp_send_proto_rej(ppp, proto);
+		//log_ppp_warn("ppp_unit_read: discarding unknown packet %x\n", proto);
+	}
+}
+
+void ppp_recv_proto_rej(struct ppp_t *ppp, uint16_t proto)
+{
+	struct ppp_handler_t *ppp_h;
+
+	list_for_each_entry(ppp_h, &ppp->chan_handlers, entry) {
+		if (ppp_h->proto == proto) {
+			if (ppp_h->recv_proto_rej)
+				ppp_h->recv_proto_rej(ppp_h);
+			return;
+		}
+	}
+	
+	list_for_each_entry(ppp_h, &ppp->unit_handlers, entry) {
+		if (ppp_h->proto == proto) {
+			if (ppp_h->recv_proto_rej)
+				ppp_h->recv_proto_rej(ppp_h);
+			return;
+		}
+	}
+}
+
+void __export ppp_layer_started(struct ppp_t *ppp, struct ppp_layer_data_t *d)
+{
+	struct layer_node_t *n = d->node;
+
+	if (d->started)
+		return;
+
+	d->started = 1;
+
+	list_for_each_entry(d, &n->items, entry)
+		if (!d->started) return;
+
+	if (n->entry.next == &ppp->layers) {
+		ppp->state = PPP_STATE_ACTIVE;
+		__sync_sub_and_fetch(&ppp_stat.starting, 1);
+		__sync_add_and_fetch(&ppp_stat.active, 1);
+		ppp->ctrl->started(ppp);
+		triton_event_fire(EV_PPP_STARTED, ppp);
+	} else {
+		n = list_entry(n->entry.next, typeof(*n), entry);
+		list_for_each_entry(d, &n->items, entry) {
+			d->starting = 1;
+			if (d->layer->start(d)) {
+				ppp_terminate(ppp, TERM_NAS_ERROR, 0);
+				return;
+			}
+		}
+	}
+}
+
+void __export ppp_layer_finished(struct ppp_t *ppp, struct ppp_layer_data_t *d)
+{
+	struct layer_node_t *n = d->node;
+
+	d->finished = 1;
+	d->starting = 0;
+
+	list_for_each_entry(n, &ppp->layers, entry) {
+		list_for_each_entry(d, &n->items, entry) {
+			if (d->starting && !d->finished)
+				return;
+		}
+	}
+
+	destablish_ppp(ppp);
+}
+
+void __export ppp_terminate(struct ppp_t *ppp, int cause, int hard)
+{
+	struct layer_node_t *n;
+	struct ppp_layer_data_t *d;
+	int s = 0;
+
+	if (ppp->terminated)
+		return;
+
+	if (!ppp->stop_time)
+		time(&ppp->stop_time);
+
+	if (!ppp->terminate_cause)
+		ppp->terminate_cause = cause;
+
+	if (ppp->terminating) {
+		if (hard)
+			destablish_ppp(ppp);
+		return;
+	}
+	
+	ppp->terminating = 1;
+	if (ppp->state == PPP_STATE_ACTIVE)
+		__sync_sub_and_fetch(&ppp_stat.active, 1);
+	else
+		__sync_sub_and_fetch(&ppp_stat.starting, 1);
+	__sync_add_and_fetch(&ppp_stat.finishing, 1);
+	ppp->state = PPP_STATE_FINISHING;
+
+	log_ppp_debug("ppp_terminate\n");
+
+	triton_event_fire(EV_PPP_FINISHING, ppp);
+
+	if (hard) {
+		destablish_ppp(ppp);
+		return;
+	}
+	
+	list_for_each_entry(n,&ppp->layers,entry) {
+		list_for_each_entry(d,&n->items,entry) {
+			if (d->starting) {
+				s = 1;
+				d->layer->finish(d);
+			}
+		}
+	}
+	if (s)
+		return;
+	destablish_ppp(ppp);
+}
+
+void __export ppp_register_chan_handler(struct ppp_t *ppp,struct ppp_handler_t *h)
+{
+	list_add_tail(&h->entry,&ppp->chan_handlers);
+}
+void __export ppp_register_unit_handler(struct ppp_t *ppp,struct ppp_handler_t *h)
+{
+	list_add_tail(&h->entry,&ppp->unit_handlers);
+}
+void __export ppp_unregister_handler(struct ppp_t *ppp,struct ppp_handler_t *h)
+{
+	list_del(&h->entry);
+}
+
+static int get_layer_order(const char *name)
+{
+	if (!strcmp(name,"lcp")) return 0;
+	if (!strcmp(name,"auth")) return 1;
+	if (!strcmp(name,"ccp")) return 2;
+	if (!strcmp(name,"ipcp")) return 2;
+	return -1;
+}
+
+int __export ppp_register_layer(const char *name, struct ppp_layer_t *layer)
+{
+	int order;
+	struct layer_node_t *n,*n1;
+
+	order = get_layer_order(name);
+
+	if (order < 0)
+		return order;
+
+	list_for_each_entry(n, &layers, entry) {
+		if (order > n->order)
+			continue;
+		if (order < n->order) {
+			n1 = _malloc(sizeof(*n1));
+			memset(n1, 0, sizeof(*n1));
+			n1->order = order;
+			INIT_LIST_HEAD(&n1->items);
+			list_add_tail(&n1->entry, &n->entry);
+			n = n1;
+		}
+		goto insert;
+	}
+	n1 = _malloc(sizeof(*n1));
+	memset(n1, 0, sizeof(*n1));
+	n1->order = order;
+	INIT_LIST_HEAD(&n1->items);
+	list_add_tail(&n1->entry, &layers);
+	n = n1;
+insert:
+	list_add_tail(&layer->entry, &n->items);
+
+	return 0;
+}
+void __export ppp_unregister_layer(struct ppp_layer_t *layer)
+{
+	list_del(&layer->entry);
+}
+
+static void init_layers(struct ppp_t *ppp)
+{
+	struct layer_node_t *n, *n1;
+	struct ppp_layer_t *l;
+	struct ppp_layer_data_t *d;
+
+	list_for_each_entry(n,&layers,entry) {
+		n1 = _malloc(sizeof(*n1));
+		memset(n1, 0, sizeof(*n1));
+		INIT_LIST_HEAD(&n1->items);
+		list_add_tail(&n1->entry, &ppp->layers);
+		list_for_each_entry(l, &n->items, entry) {
+			d = l->init(ppp);
+			d->layer = l;
+			d->started = 0;
+			d->node = n1;
+			list_add_tail(&d->entry, &n1->items);
+		}
+	}
+}
+
+static void _free_layers(struct ppp_t *ppp)
+{
+	struct layer_node_t *n;
+	struct ppp_layer_data_t *d;
+	
+	while (!list_empty(&ppp->layers)) {
+		n = list_entry(ppp->layers.next, typeof(*n), entry);
+		while (!list_empty(&n->items)) {
+			d = list_entry(n->items.next, typeof(*d), entry);
+			list_del(&d->entry);
+			d->layer->free(d);
+		}
+		list_del(&n->entry);
+		_free(n);
+	}
+}
+
+static void start_first_layer(struct ppp_t *ppp)
+{
+	struct layer_node_t *n;
+	struct ppp_layer_data_t *d;
+
+	n = list_entry(ppp->layers.next, typeof(*n), entry);
+	list_for_each_entry(d, &n->items, entry) {
+		d->starting = 1;
+		if (d->layer->start(d)) {
+			ppp_terminate(ppp, TERM_NAS_ERROR, 0);
+			return;
+		}
+	}
+}
+
+struct ppp_layer_data_t *ppp_find_layer_data(struct ppp_t *ppp, struct ppp_layer_t *layer)
+{
+	struct layer_node_t *n;
+	struct ppp_layer_data_t *d;
+
+	list_for_each_entry(n,&ppp->layers,entry) {
+		list_for_each_entry(d,&n->items,entry) {
+			if (d->layer == layer)
+				return d;
+		}
+	}
+	
+	return NULL;
+}
+
+void ppp_shutdown_soft(void)
+{
+	ppp_shutdown = 1;
+
+	if (!ppp_stat.starting && !ppp_stat.active && !ppp_stat.finishing)
+		kill(getpid(), SIGTERM);
+}
+
+static void save_seq(void)
+{
+	FILE *f;
+	char *opt = conf_get_opt("ppp", "seq-file");
+	if (!opt)
+		opt = "/var/run/accel-ppp/seq";
+
+	f = fopen(opt, "w");
+	if (f) {
+		fprintf(f, "%llu", seq);
+		fclose(f);
+	}
+}
+
+static void load_config(void)
+{
+	char *opt;
+
+	opt = conf_get_opt("ppp", "verbose");
+	if (opt && atoi(opt) > 0)
+		conf_ppp_verbose = 1;
+
+	opt = conf_get_opt("ppp", "sid-case");
+	if (opt) {
+		if (!strcmp(opt, "upper"))
+			conf_sid_ucase = 1;
+		else if (strcmp(opt, "lower"))
+			log_emerg("ppp: sid-case: invalid format\n");
+	}
+}
+
+static void __init init(void)
+{
+	char *opt;
+	FILE *f;
+
+	sock_fd = socket(AF_INET, SOCK_DGRAM, 0);
+	if (sock_fd < 0) {
+		perror("socket");
+		_exit(EXIT_FAILURE);
+	}
+
+	opt = conf_get_opt("ppp", "seq-file");
+	if (!opt)
+		opt = "/var/run/accel-ppp/seq";
+	
+	f = fopen(opt, "r");
+	if (f) {
+		fscanf(f, "%llu", &seq);
+		fclose(f);
+	} else
+		seq = (unsigned long long)random() * (unsigned long long)random();
+
+	load_config();
+	triton_event_register_handler(EV_CONFIG_RELOAD, (triton_event_func)load_config);
+
+	atexit(save_seq);
+}
+
diff --git a/accel-pppd/ppp/ppp.h b/accel-pppd/ppp/ppp.h
new file mode 100644
index 0000000..c633135
--- /dev/null
+++ b/accel-pppd/ppp/ppp.h
@@ -0,0 +1,189 @@
+#ifndef PPP_H
+#define PPP_H
+
+#include <sys/types.h>
+#include <time.h>
+#include <netinet/in.h>
+#include <pthread.h>
+
+#include "triton.h"
+#include "list.h"
+
+/*
+ * Packet header = Code, id, length.
+ */
+#define PPP_HEADERLEN	4
+#define PPP_MTU 1500
+
+
+/*
+ * Protocol field values.
+ */
+#define PPP_IP		0x21	/* Internet Protocol */
+#define PPP_AT		0x29	/* AppleTalk Protocol */
+#define PPP_IPX		0x2b	/* IPX protocol */
+#define	PPP_VJC_COMP	0x2d	/* VJ compressed TCP */
+#define	PPP_VJC_UNCOMP	0x2f	/* VJ uncompressed TCP */
+#define PPP_IPV6	0x57	/* Internet Protocol Version 6 */
+#define PPP_COMP	0xfd	/* compressed packet */
+#define PPP_IPCP	0x8021	/* IP Control Protocol */
+#define PPP_ATCP	0x8029	/* AppleTalk Control Protocol */
+#define PPP_IPXCP	0x802b	/* IPX Control Protocol */
+#define PPP_IPV6CP	0x8057	/* IPv6 Control Protocol */
+#define PPP_CCP		0x80fd	/* Compression Control Protocol */
+#define PPP_ECP		0x8053	/* Encryption Control Protocol */
+#define PPP_LCP		0xc021	/* Link Control Protocol */
+#define PPP_PAP		0xc023	/* Password Authentication Protocol */
+#define PPP_LQR		0xc025	/* Link Quality Report protocol */
+#define PPP_CHAP	0xc223	/* Cryptographic Handshake Auth. Protocol */
+#define PPP_CBCP	0xc029	/* Callback Control Protocol */
+#define PPP_EAP		0xc227	/* Extensible Authentication Protocol */
+
+#define PPP_SESSIONID_LEN 16
+#define PPP_IFNAME_LEN 10
+
+#define PPP_STATE_STARTING  1
+#define PPP_STATE_ACTIVE    2
+#define PPP_STATE_FINISHING 3
+
+#define TERM_USER_REQUEST 1
+#define TERM_SESSION_TIMEOUT 2
+#define TERM_ADMIN_RESET 3
+#define TERM_USER_ERROR 4
+#define TERM_NAS_ERROR 5
+#define TERM_NAS_REQUEST 6
+#define TERM_NAS_REBOOT 7
+#define TERM_AUTH_ERROR 8
+
+
+struct ppp_t;
+
+struct ppp_ctrl_t
+{
+	struct triton_context_t *ctx;
+	const char *name;
+	int max_mtu;
+	char *calling_station_id;
+	char *called_station_id;
+	void (*started)(struct ppp_t*);
+	void (*finished)(struct ppp_t*);
+};
+
+struct ppp_pd_t
+{
+	struct list_head entry;
+	void *key;
+};
+
+struct ppp_t
+{
+	struct list_head entry;
+	struct triton_md_handler_t chan_hnd;
+	struct triton_md_handler_t unit_hnd;
+	int fd;
+	int chan_fd;
+	int unit_fd;
+
+	int chan_idx;
+	int unit_idx;
+
+	int state;
+	char *chan_name;
+	char ifname[PPP_IFNAME_LEN];
+	char sessionid[PPP_SESSIONID_LEN+1];
+	time_t start_time;
+	time_t stop_time;
+	char *username;
+	in_addr_t ipaddr;
+	in_addr_t peer_ipaddr;
+
+	struct ppp_ctrl_t *ctrl;
+
+	int terminating:1;
+	int terminated:1;
+	int terminate_cause;
+
+	void *chan_buf;
+	int chan_buf_size;
+	void *unit_buf;
+	int unit_buf_size;
+
+	struct list_head chan_handlers;
+	struct list_head unit_handlers;
+
+	struct list_head layers;
+	
+	struct ppp_lcp_t *lcp;
+
+	struct list_head pd_list;
+};
+
+struct ppp_layer_t;
+struct layer_node_t;
+struct ppp_layer_data_t
+{
+	struct list_head entry;
+	struct ppp_layer_t *layer;
+	struct layer_node_t *node;
+	int starting:1;
+	int started:1;
+	int finished:1;
+};
+
+struct ppp_layer_t
+{
+	struct list_head entry;
+	struct ppp_layer_data_t *(*init)(struct ppp_t *);
+	int (*start)(struct ppp_layer_data_t*);
+	void (*finish)(struct ppp_layer_data_t*);
+	void (*free)(struct ppp_layer_data_t *);
+};
+
+struct ppp_handler_t
+{
+	struct list_head entry;
+	int proto;
+	void (*recv)(struct ppp_handler_t*);
+	void (*recv_proto_rej)(struct ppp_handler_t *h);
+};
+
+struct ppp_stat_t
+{
+	unsigned int active;
+	unsigned int starting;
+	unsigned int finishing;
+};
+
+struct ppp_t *alloc_ppp(void);
+void ppp_init(struct ppp_t *ppp);
+int establish_ppp(struct ppp_t *ppp);
+int ppp_chan_send(struct ppp_t *ppp, void *data, int size);
+int ppp_unit_send(struct ppp_t *ppp, void *data, int size);
+void lcp_send_proto_rej(struct ppp_t *ppp, uint16_t proto);
+void ppp_recv_proto_rej(struct ppp_t *ppp, uint16_t proto);
+
+struct ppp_fsm_t* ppp_lcp_init(struct ppp_t *ppp);
+void ppp_layer_started(struct ppp_t *ppp,struct ppp_layer_data_t*);
+void ppp_layer_finished(struct ppp_t *ppp,struct ppp_layer_data_t*);
+void ppp_terminate(struct ppp_t *ppp, int hard, int cause);
+
+void ppp_register_chan_handler(struct ppp_t *, struct ppp_handler_t *);
+void ppp_register_unit_handler(struct ppp_t * ,struct ppp_handler_t *);
+void ppp_unregister_handler(struct ppp_t *, struct ppp_handler_t *);
+
+int ppp_register_layer(const char *name, struct ppp_layer_t *);
+void ppp_unregister_layer(struct ppp_layer_t *);
+struct ppp_layer_data_t *ppp_find_layer_data(struct ppp_t *, struct ppp_layer_t *);
+
+extern int ppp_shutdown;
+void ppp_shutdown_soft(void);
+
+extern int conf_ppp_verbose;
+
+extern pthread_rwlock_t ppp_lock;
+extern struct list_head ppp_list;
+
+extern struct ppp_stat_t ppp_stat;
+
+extern int sock_fd; // internet socket for ioctls
+#endif
diff --git a/accel-pppd/ppp/ppp_auth.c b/accel-pppd/ppp/ppp_auth.c
new file mode 100644
index 0000000..32413c6
--- /dev/null
+++ b/accel-pppd/ppp/ppp_auth.c
@@ -0,0 +1,346 @@
+#include <stdlib.h>
+#include <string.h>
+#include <arpa/inet.h>
+
+#include "ppp.h"
+#include "events.h"
+#include "ppp_lcp.h"
+#include "log.h"
+
+#include "ppp_auth.h"
+
+#include "memdebug.h"
+
+static LIST_HEAD(auth_handlers);
+static int extra_opt_len = 0;
+
+static struct lcp_option_t *auth_init(struct ppp_lcp_t *lcp);
+static void auth_free(struct ppp_lcp_t *lcp, struct lcp_option_t *opt);
+static int auth_send_conf_req(struct ppp_lcp_t *lcp, struct lcp_option_t *opt, uint8_t *ptr);
+static int auth_recv_conf_req(struct ppp_lcp_t *lcp, struct lcp_option_t *opt, uint8_t *ptr);
+static int auth_recv_conf_nak(struct ppp_lcp_t *lcp, struct lcp_option_t *opt, uint8_t *ptr);
+static int auth_recv_conf_rej(struct ppp_lcp_t *lcp, struct lcp_option_t *opt, uint8_t *ptr);
+static int auth_recv_conf_ack(struct ppp_lcp_t *lcp, struct lcp_option_t *opt, uint8_t *ptr);
+static void auth_print(void (*print)(const char *fmt,...), struct lcp_option_t*, uint8_t *ptr);
+
+static struct ppp_layer_data_t *auth_layer_init(struct ppp_t*);
+static int auth_layer_start(struct ppp_layer_data_t *);
+static void auth_layer_finish(struct ppp_layer_data_t *);
+static void auth_layer_free(struct ppp_layer_data_t *);
+
+struct auth_option_t
+{
+	struct lcp_option_t opt;
+	struct list_head auth_list;
+	struct auth_data_t *auth;
+	struct auth_data_t *peer_auth;
+	int started:1;
+};
+
+struct auth_layer_data_t
+{
+	struct ppp_layer_data_t ld;
+	struct auth_option_t auth_opt;
+	struct ppp_t *ppp;
+};
+
+static struct lcp_option_handler_t auth_opt_hnd = 
+{
+	.init = auth_init,
+	.send_conf_req = auth_send_conf_req,
+	.send_conf_nak = auth_send_conf_req,
+	.recv_conf_req = auth_recv_conf_req,
+	.recv_conf_nak = auth_recv_conf_nak,
+	.recv_conf_rej = auth_recv_conf_rej,
+	.recv_conf_ack = auth_recv_conf_ack,
+	.free = auth_free,
+	.print = auth_print,
+};
+
+static struct ppp_layer_t auth_layer = 
+{
+	.init = auth_layer_init,
+	.start = auth_layer_start,
+	.finish = auth_layer_finish,
+	.free = auth_layer_free,
+};
+
+static struct lcp_option_t *auth_init(struct ppp_lcp_t *lcp)
+{
+	struct ppp_auth_handler_t *h;
+	struct auth_data_t *d;
+	struct auth_layer_data_t *ad;
+
+	ad = container_of(ppp_find_layer_data(lcp->ppp, &auth_layer), typeof(*ad), ld);
+
+	ad->auth_opt.opt.id = CI_AUTH;
+	ad->auth_opt.opt.len = 4 + extra_opt_len;
+
+	INIT_LIST_HEAD(&ad->auth_opt.auth_list);
+
+	list_for_each_entry(h, &auth_handlers, entry) {
+		d = h->init(lcp->ppp);
+		d->h = h;
+		list_add_tail(&d->entry, &ad->auth_opt.auth_list);
+	}
+
+	return &ad->auth_opt.opt;
+}
+
+static void auth_free(struct ppp_lcp_t *lcp, struct lcp_option_t *opt)
+{
+	struct auth_option_t *auth_opt = container_of(opt, typeof(*auth_opt), opt);
+	struct auth_data_t *d;
+
+	if (auth_opt->started && auth_opt->auth) {
+		auth_opt->auth->h->finish(lcp->ppp, auth_opt->auth);
+		auth_opt->started = 0;
+	}
+
+	while(!list_empty(&auth_opt->auth_list)) {
+		d = list_entry(auth_opt->auth_list.next, typeof(*d), entry);
+		list_del(&d->entry);
+		d->h->free(lcp->ppp, d);
+	}
+}
+
+static int auth_send_conf_req(struct ppp_lcp_t *lcp, struct lcp_option_t *opt, uint8_t *ptr)
+{
+	struct auth_option_t *auth_opt = container_of(opt, typeof(*auth_opt), opt);
+	struct lcp_opt16_t *opt16 = (struct lcp_opt16_t*)ptr;
+	struct auth_data_t *d;
+	int n;
+
+	if (list_empty(&auth_opt->auth_list))
+		return 0;
+
+	if (!auth_opt->auth || auth_opt->auth->state == LCP_OPT_NAK) {
+		list_for_each_entry(d, &auth_opt->auth_list, entry) {
+			if (d->state == LCP_OPT_NAK || d->state == LCP_OPT_REJ)
+				continue;
+			auth_opt->auth = d;
+			break;
+		}
+	}
+
+	opt16->hdr.id = CI_AUTH;
+	opt16->val = htons(auth_opt->auth->proto);
+	n = auth_opt->auth->h->send_conf_req(lcp->ppp, auth_opt->auth, (uint8_t*)(opt16 + 1));
+	opt16->hdr.len = 4 + n;
+
+	return 4 + n;
+}
+
+static int auth_recv_conf_req(struct ppp_lcp_t *lcp, struct lcp_option_t *opt, uint8_t *ptr)
+{
+	struct auth_option_t *auth_opt = container_of(opt,typeof(*auth_opt),opt);
+	struct lcp_opt16_t *opt16 = (struct lcp_opt16_t*)ptr;
+	struct auth_data_t *d;
+	int r;
+
+	if (list_empty(&auth_opt->auth_list))
+		return LCP_OPT_REJ;
+		
+	if (!ptr)
+		return LCP_OPT_ACK;
+
+
+	list_for_each_entry(d, &auth_opt->auth_list, entry) {
+		if (d->proto == ntohs(opt16->val)) {
+			r = d->h->recv_conf_req(lcp->ppp, d, (uint8_t*)(opt16 + 1));
+			if (r == LCP_OPT_FAIL)
+				return LCP_OPT_FAIL;
+			if (r == LCP_OPT_REJ)
+				break;
+			auth_opt->peer_auth = d;
+			return r;
+		}
+	}
+		
+	list_for_each_entry(d, &auth_opt->auth_list, entry) {
+		if (d->state != LCP_OPT_NAK) {
+			auth_opt->peer_auth = d;
+			return LCP_OPT_NAK;
+		}
+	}
+
+	log_ppp_error("cann't negotiate authentication type\n");
+	return LCP_OPT_FAIL;
+}
+
+static int auth_recv_conf_ack(struct ppp_lcp_t *lcp, struct lcp_option_t *opt, uint8_t *ptr)
+{
+	struct auth_option_t *auth_opt = container_of(opt, typeof(*auth_opt), opt);
+
+	auth_opt->peer_auth = NULL;
+
+	return 0;
+}
+
+static int auth_recv_conf_nak(struct ppp_lcp_t *lcp, struct lcp_option_t *opt, uint8_t *ptr)
+{
+	struct auth_option_t *auth_opt = container_of(opt, typeof(*auth_opt), opt);
+	struct auth_data_t *d;
+
+	if (!auth_opt->auth) {
+		log_ppp_error("auth: unexcepcted configure-nak\n");
+		return -1;
+	}
+	auth_opt->auth->state = LCP_OPT_NAK;
+	if (auth_opt->peer_auth)
+		auth_opt->auth = auth_opt->peer_auth;
+	
+	list_for_each_entry(d, &auth_opt->auth_list, entry) {
+		if (d->state != LCP_OPT_NAK)
+			return 0;
+	}
+
+	log_ppp_error("cann't negotiate authentication type\n");
+	return -1;
+}
+
+static int auth_recv_conf_rej(struct ppp_lcp_t *lcp, struct lcp_option_t *opt, uint8_t *ptr)
+{
+	struct auth_option_t *auth_opt = container_of(opt, typeof(*auth_opt), opt);
+	struct auth_data_t *d;
+
+	if (!auth_opt->auth) {
+		log_ppp_error("auth: unexcepcted configure-reject\n");
+		return -1;
+	}
+	
+	auth_opt->auth->state = LCP_OPT_NAK;
+	if (auth_opt->peer_auth)
+		auth_opt->auth = auth_opt->peer_auth;
+	
+	list_for_each_entry(d, &auth_opt->auth_list, entry) {
+		if (d->state != LCP_OPT_NAK)
+			return 0;
+	}
+
+	log_ppp_error("cann't negotiate authentication type\n");
+	return -1;
+}
+
+static void auth_print(void (*print)(const char *fmt,...), struct lcp_option_t *opt, uint8_t *ptr)
+{
+	struct auth_option_t *auth_opt = container_of(opt, typeof(*auth_opt), opt);
+	struct lcp_opt16_t *opt16 = (struct lcp_opt16_t*)ptr;
+	struct auth_data_t *d;
+
+	if (ptr) {
+		list_for_each_entry(d, &auth_opt->auth_list, entry) {
+			if (d->proto == ntohs(opt16->val) && (!d->h->check || d->h->check((uint8_t *)(opt16 + 1))))
+				goto print_d;
+		}
+
+		print("<auth %02x>", ntohs(opt16->val));
+		return;
+	} else if (auth_opt->auth)
+		d = auth_opt->auth;
+	else
+		return;
+
+print_d:
+	print("<auth %s>", d->h->name);
+}
+
+static struct ppp_layer_data_t *auth_layer_init(struct ppp_t *ppp)
+{
+	struct auth_layer_data_t *ad = _malloc(sizeof(*ad));
+
+	log_ppp_debug("auth_layer_init\n");
+	
+	memset(ad, 0, sizeof(*ad));
+
+	ad->ppp = ppp;
+
+	return &ad->ld;
+}
+
+static int auth_layer_start(struct ppp_layer_data_t *ld)
+{
+	struct auth_layer_data_t *ad = container_of(ld,typeof(*ad),ld);
+	
+	log_ppp_debug("auth_layer_start\n");
+		
+	if (ad->auth_opt.auth) {
+		ad->auth_opt.started = 1;
+		ad->auth_opt.auth->h->start(ad->ppp, ad->auth_opt.auth);
+	} else {
+		log_ppp_debug("auth_layer_started\n");
+		ppp_layer_started(ad->ppp, ld);
+	}
+	
+	return 0;
+}
+
+static void auth_layer_finish(struct ppp_layer_data_t *ld)
+{
+	struct auth_layer_data_t *ad = container_of(ld, typeof(*ad), ld);
+	
+	log_ppp_debug("auth_layer_finish\n");
+	
+	if (ad->auth_opt.auth)
+		ad->auth_opt.auth->h->finish(ad->ppp, ad->auth_opt.auth);
+	
+	ad->auth_opt.started = 0;
+
+	log_ppp_debug("auth_layer_finished\n");
+	ppp_layer_finished(ad->ppp, ld);
+}
+
+static void auth_layer_free(struct ppp_layer_data_t *ld)
+{
+	struct auth_layer_data_t *ad = container_of(ld, typeof(*ad), ld);
+
+	log_ppp_debug("auth_layer_free\n");
+
+	_free(ad);
+}
+
+void __export ppp_auth_successed(struct ppp_t *ppp, char *username)
+{
+	struct auth_layer_data_t *ad = container_of(ppp_find_layer_data(ppp, &auth_layer), typeof(*ad), ld);
+	log_ppp_debug("auth_layer_started\n");
+	ppp->username = username;
+	ppp_layer_started(ppp, &ad->ld);
+	log_ppp_info1("%s: authentication successed\n", username);
+	triton_event_fire(EV_PPP_AUTHORIZED, ppp);
+}
+
+void __export ppp_auth_failed(struct ppp_t *ppp, const char *username)
+{
+	if (username)
+		log_ppp_info1("%s: authentication failed\n", username);
+	else
+		log_ppp_info1("authentication failed\n");
+	ppp_terminate(ppp, TERM_AUTH_ERROR, 0);
+}
+
+int __export ppp_auth_register_handler(struct ppp_auth_handler_t *h)
+{
+	list_add_tail(&h->entry, &auth_handlers);
+	return 0;
+}
+
+int __export ppp_auth_restart(struct ppp_t *ppp)
+{
+	struct auth_layer_data_t *ad = container_of(ppp_find_layer_data(ppp, &auth_layer), typeof(*ad), ld);
+	log_ppp_debug("ppp_auth_restart\n");
+
+	if (!ad->auth_opt.auth->h->restart)
+		return -1;
+	
+	if (ad->auth_opt.auth->h->restart(ppp, ad->auth_opt.auth))
+		return -1;
+	
+	return 0;
+}
+
+static void __init ppp_auth_init()
+{
+	ppp_register_layer("auth", &auth_layer);
+	lcp_option_register(&auth_opt_hnd);
+}
+
diff --git a/accel-pppd/ppp/ppp_auth.h b/accel-pppd/ppp/ppp_auth.h
new file mode 100644
index 0000000..87cc742
--- /dev/null
+++ b/accel-pppd/ppp/ppp_auth.h
@@ -0,0 +1,37 @@
+#ifndef PPP_AUTH_H
+#define PPP_AUTH_H
+
+#include "list.h"
+
+struct ppp_auth_handler_t;
+
+struct auth_data_t
+{
+	struct list_head entry;
+	int proto;
+	int state; 
+	struct ppp_auth_handler_t *h;
+};
+
+struct ppp_auth_handler_t
+{
+	struct list_head entry;
+	const char *name;
+	struct auth_data_t* (*init)(struct ppp_t*);
+	int (*send_conf_req)(struct ppp_t*, struct auth_data_t*, uint8_t*);
+	int (*recv_conf_req)(struct ppp_t*, struct auth_data_t*, uint8_t*);
+	int (*start)(struct ppp_t*, struct auth_data_t*);
+	int (*finish)(struct ppp_t*, struct auth_data_t*);
+	void (*free)(struct ppp_t*,struct auth_data_t*);
+	int (*check)(uint8_t *);
+	int (*restart)(struct ppp_t*,struct auth_data_t*);
+};
+
+int ppp_auth_register_handler(struct ppp_auth_handler_t*);
+
+void ppp_auth_successed(struct ppp_t *ppp, char *username);
+void ppp_auth_failed(struct ppp_t *ppp, const char *username);
+int  ppp_auth_restart(struct ppp_t *ppp);
+
+#endif
+
diff --git a/accel-pppd/ppp/ppp_ccp.c b/accel-pppd/ppp/ppp_ccp.c
new file mode 100644
index 0000000..721dd9b
--- /dev/null
+++ b/accel-pppd/ppp/ppp_ccp.c
@@ -0,0 +1,759 @@
+#include <stdlib.h>
+#include <string.h>
+#include <errno.h>
+#include <sys/socket.h>
+#include <sys/ioctl.h>
+#include "linux_ppp.h"
+
+#include "triton.h"
+
+#include "log.h"
+#include "events.h"
+
+#include "ppp.h"
+#include "ppp_ccp.h"
+
+#include "memdebug.h"
+
+struct recv_opt_t
+{
+	struct list_head entry;
+	struct ccp_opt_hdr_t *hdr;
+	int len;
+	int state;
+	struct ccp_option_t *lopt;
+};
+
+static int conf_ccp = 1;
+
+static struct ppp_layer_t ccp_layer;
+static LIST_HEAD(option_handlers);
+
+static void ccp_layer_up(struct ppp_fsm_t*);
+static void ccp_layer_down(struct ppp_fsm_t*);
+static int send_conf_req(struct ppp_fsm_t*);
+static void send_conf_ack(struct ppp_fsm_t*);
+static void send_conf_nak(struct ppp_fsm_t*);
+static void send_conf_rej(struct ppp_fsm_t*);
+static void send_term_req(struct ppp_fsm_t *fsm);
+static void send_term_ack(struct ppp_fsm_t *fsm);
+static void ccp_recv(struct ppp_handler_t*);
+static void ccp_recv_proto_rej(struct ppp_handler_t*);
+
+static void ccp_options_init(struct ppp_ccp_t *ccp)
+{
+	struct ccp_option_t *lopt;
+	struct ccp_option_handler_t *h;
+
+	ccp->conf_req_len = sizeof(struct ccp_hdr_t);
+
+	list_for_each_entry(h, &option_handlers, entry) {
+		lopt = h->init(ccp);
+		if (lopt) {
+			lopt->h = h;
+			list_add_tail(&lopt->entry, &ccp->options);
+			ccp->conf_req_len += lopt->len;
+		}
+	}
+}
+
+static void ccp_options_free(struct ppp_ccp_t *ccp)
+{
+	struct ccp_option_t *lopt;
+
+	while (!list_empty(&ccp->options)) {
+		lopt = list_entry(ccp->options.next, typeof(*lopt), entry);
+		list_del(&lopt->entry);
+		lopt->h->free(ccp, lopt);
+	}
+}
+
+static int ccp_set_flags(int fd, int isopen, int isup)
+{
+	int flags;
+
+	if (ioctl(fd, PPPIOCGFLAGS, &flags)) {
+		log_ppp_error("ccp: failed to get flags: %s\n", strerror(errno));
+		return -1;
+	}
+	
+	flags &= ~(SC_CCP_OPEN | SC_CCP_UP);
+	flags |= (isopen ? SC_CCP_OPEN : 0) | (isup ? SC_CCP_UP : 0);
+
+	if (ioctl(fd, PPPIOCSFLAGS, &flags)) {
+		log_ppp_error("ccp: failed to set flags: %s\n", strerror(errno));
+		return -1;
+	}
+	
+	return 0;
+}
+
+static struct ppp_layer_data_t *ccp_layer_init(struct ppp_t *ppp)
+{
+	struct ppp_ccp_t *ccp = _malloc(sizeof(*ccp));
+	memset(ccp, 0, sizeof(*ccp));
+	
+	log_ppp_debug("ccp_layer_init\n");
+
+	ccp->ppp = ppp;
+	ccp->fsm.ppp = ppp;
+	
+	ccp->hnd.proto = PPP_CCP;
+	ccp->hnd.recv = ccp_recv;
+	ccp->hnd.recv_proto_rej = ccp_recv_proto_rej;
+	
+	ppp_register_unit_handler(ppp, &ccp->hnd);
+	
+	INIT_LIST_HEAD(&ccp->options);
+	ccp_options_init(ccp);
+
+	ccp->passive = 0;
+	
+	ccp->fsm.proto = PPP_CCP;
+	ppp_fsm_init(&ccp->fsm);
+
+	ccp->fsm.layer_up = ccp_layer_up;
+	ccp->fsm.layer_finished = ccp_layer_down;
+	ccp->fsm.send_conf_req = send_conf_req;
+	ccp->fsm.send_conf_ack = send_conf_ack;
+	ccp->fsm.send_conf_nak = send_conf_nak;
+	ccp->fsm.send_conf_rej = send_conf_rej;
+	ccp->fsm.send_term_req = send_term_req;
+	ccp->fsm.send_term_ack = send_term_ack;
+
+	INIT_LIST_HEAD(&ccp->ropt_list);
+
+	return &ccp->ld;
+}
+
+int ccp_layer_start(struct ppp_layer_data_t *ld)
+{
+	struct ppp_ccp_t *ccp = container_of(ld, typeof(*ccp), ld);
+	
+	log_ppp_debug("ccp_layer_start\n");
+
+	if (list_empty(&ccp->options) || !conf_ccp) {
+		ppp_layer_started(ccp->ppp, &ccp->ld);
+		return 0;
+	}
+	
+	ppp_fsm_lower_up(&ccp->fsm);
+	if (ppp_fsm_open(&ccp->fsm))
+		return -1;
+	
+	if (ccp_set_flags(ccp->ppp->unit_fd, 1, 0)) {
+		ppp_fsm_close(&ccp->fsm);
+		return -1;
+	}
+	
+	return 0;
+}
+
+void ccp_layer_finish(struct ppp_layer_data_t *ld)
+{
+	struct ppp_ccp_t *ccp = container_of(ld, typeof(*ccp), ld);
+	
+	log_ppp_debug("ccp_layer_finish\n");
+	
+	ccp_set_flags(ccp->ppp->unit_fd, 0, 0);
+
+	ccp->fsm.fsm_state = FSM_Closed;
+	
+	log_ppp_debug("ccp_layer_finished\n");
+	ppp_layer_finished(ccp->ppp, &ccp->ld);
+}
+
+void ccp_layer_free(struct ppp_layer_data_t *ld)
+{
+	struct ppp_ccp_t *ccp = container_of(ld, typeof(*ccp), ld);
+	
+	log_ppp_debug("ccp_layer_free\n");
+		
+	ppp_unregister_handler(ccp->ppp, &ccp->hnd);
+	ccp_options_free(ccp);
+	ppp_fsm_free(&ccp->fsm);
+
+	_free(ccp);
+}
+
+static void ccp_layer_up(struct ppp_fsm_t *fsm)
+{
+	struct ppp_ccp_t *ccp = container_of(fsm, typeof(*ccp), fsm);
+
+	log_ppp_debug("ccp_layer_started\n");
+
+	if (!ccp->started) {
+		ccp->started = 1;
+		if (ccp_set_flags(ccp->ppp->unit_fd, 1, 1)) {
+			ppp_terminate(ccp->ppp, TERM_NAS_ERROR, 0);
+			return;
+		}
+		ppp_layer_started(ccp->ppp, &ccp->ld);
+	}
+}
+
+static void ccp_layer_down(struct ppp_fsm_t *fsm)
+{
+	struct ppp_ccp_t *ccp = container_of(fsm, typeof(*ccp), fsm);
+
+	log_ppp_debug("ccp_layer_finished\n");
+
+	if (!ccp->started)
+		ppp_layer_started(ccp->ppp, &ccp->ld);
+	ccp->started = 0;
+	ppp_layer_finished(ccp->ppp, &ccp->ld);
+}
+
+static void print_ropt(struct recv_opt_t *ropt)
+{
+	int i;
+	uint8_t *ptr = (uint8_t*)ropt->hdr;
+
+	log_ppp_info2("<");
+	for (i = 0; i < ropt->len; i++) {
+		log_ppp_info2(" %x", ptr[i]);
+	}
+	log_ppp_info2(" >");
+}
+
+static int send_conf_req(struct ppp_fsm_t *fsm)
+{
+	struct ppp_ccp_t *ccp = container_of(fsm, typeof(*ccp), fsm);
+	uint8_t *buf, *ptr;
+	struct ccp_hdr_t *ccp_hdr;
+	struct ccp_option_t *lopt;
+	int n;
+
+	ccp->need_req = 0;
+
+	if (ccp->passive) {
+		ccp->passive--;
+		return 0;
+	}
+
+	buf = _malloc(ccp->conf_req_len);
+	ccp_hdr = (struct ccp_hdr_t*)buf;
+
+	ccp_hdr->proto = htons(PPP_CCP);
+	ccp_hdr->code = CONFREQ;
+	ccp_hdr->id = ++ccp->fsm.id;
+	ccp_hdr->len = 0;
+	
+	ptr = (uint8_t*)(ccp_hdr + 1);
+
+	if (conf_ppp_verbose)
+		log_ppp_info2("send [CCP ConfReq id=%x", ccp_hdr->id);
+	
+	list_for_each_entry(lopt, &ccp->options, entry) {
+		n = lopt->h->send_conf_req(ccp, lopt, ptr);
+		if (n < 0)
+			return -1;
+		if (n) {
+			if (conf_ppp_verbose) {
+				log_ppp_info2(" ");
+				lopt->h->print(log_ppp_info2, lopt, NULL);
+			}
+		}
+		ptr += n;
+	}
+	
+	if (conf_ppp_verbose)
+		log_ppp_info2("]\n");
+	
+	ccp_hdr->len = htons(ptr - buf - 2);
+	ppp_unit_send(ccp->ppp, ccp_hdr, ptr - buf);
+
+	_free(buf);
+
+	return 0;
+}
+
+static void send_conf_ack(struct ppp_fsm_t *fsm)
+{
+	struct ppp_ccp_t *ccp = container_of(fsm, typeof(*ccp), fsm);
+	struct ccp_hdr_t *hdr = (struct ccp_hdr_t*)ccp->ppp->unit_buf;
+
+	hdr->code = CONFACK;
+
+	if (conf_ppp_verbose)
+		log_ppp_info2("send [CCP ConfAck id=%x]\n", ccp->fsm.recv_id);
+
+	ppp_unit_send(ccp->ppp,hdr,ntohs(hdr->len)+2);
+}
+
+static void send_conf_nak(struct ppp_fsm_t *fsm)
+{
+	struct ppp_ccp_t *ccp = container_of(fsm, typeof(*ccp), fsm);
+	uint8_t *buf = _malloc(ccp->conf_req_len), *ptr = buf;
+	struct ccp_hdr_t *ccp_hdr = (struct ccp_hdr_t*)ptr;
+	struct recv_opt_t *ropt;
+
+	if (conf_ppp_verbose)
+		log_ppp_info2("send [CCP ConfNak id=%x", ccp->fsm.recv_id);
+
+	ccp_hdr->proto = htons(PPP_CCP);
+	ccp_hdr->code = CONFNAK;
+	ccp_hdr->id = ccp->fsm.recv_id;
+	ccp_hdr->len = 0;
+	
+	ptr += sizeof(*ccp_hdr);
+
+	list_for_each_entry(ropt, &ccp->ropt_list, entry) {
+		if (ropt->state == CCP_OPT_NAK) {
+			if (conf_ppp_verbose) {
+				log_ppp_info2(" ");
+				ropt->lopt->h->print(log_ppp_info2, ropt->lopt, NULL);
+			}
+			ptr += ropt->lopt->h->send_conf_nak(ccp, ropt->lopt, ptr);
+		}
+	}
+	
+	if (conf_ppp_verbose)
+		log_ppp_info2("]\n");
+
+	ccp_hdr->len = htons(ptr - buf - 2);
+	ppp_unit_send(ccp->ppp, ccp_hdr, ptr - buf);
+
+	_free(buf);
+}
+
+static void send_conf_rej(struct ppp_fsm_t *fsm)
+{
+	struct ppp_ccp_t *ccp = container_of(fsm, typeof(*ccp), fsm);
+	uint8_t *buf = _malloc(ccp->ropt_len + sizeof(struct ccp_hdr_t)), *ptr = buf;
+	struct ccp_hdr_t *ccp_hdr = (struct ccp_hdr_t*)ptr;
+	struct recv_opt_t *ropt;
+
+	if (conf_ppp_verbose)
+		log_ppp_info2("send [CCP ConfRej id=%x", ccp->fsm.recv_id);
+
+	ccp_hdr->proto = htons(PPP_CCP);
+	ccp_hdr->code = CONFREJ;
+	ccp_hdr->id = ccp->fsm.recv_id;
+	ccp_hdr->len = 0;
+
+	ptr += sizeof(*ccp_hdr);
+
+	list_for_each_entry(ropt, &ccp->ropt_list, entry) {
+		if (ropt->state == CCP_OPT_REJ) {
+			if (conf_ppp_verbose) {
+				log_ppp_info2(" ");
+				if (ropt->lopt)
+					ropt->lopt->h->print(log_ppp_info2, ropt->lopt, (uint8_t*)ropt->hdr);
+				else
+					print_ropt(ropt);
+			}
+			memcpy(ptr, ropt->hdr, ropt->len);
+			ptr += ropt->len;
+		}
+	}
+
+	if (conf_ppp_verbose)
+		log_ppp_info2("]\n");
+
+	ccp_hdr->len = htons(ptr - buf - 2);
+	ppp_unit_send(ccp->ppp, ccp_hdr, ptr-buf);
+
+	_free(buf);
+}
+
+static int ccp_recv_conf_req(struct ppp_ccp_t *ccp, uint8_t *data, int size)
+{
+	struct ccp_opt_hdr_t *hdr;
+	struct recv_opt_t *ropt;
+	struct ccp_option_t *lopt;
+	int r, ret = 1, ack = 0;
+
+	ccp->need_req = 0;
+	ccp->ropt_len = size;
+
+	while (size > 0) {
+		hdr = (struct ccp_opt_hdr_t *)data;
+
+		ropt = _malloc(sizeof(*ropt));
+		memset(ropt, 0, sizeof(*ropt));
+
+		if (hdr->len > size)
+			ropt->len = size;
+		else
+			ropt->len = hdr->len;
+			
+		ropt->hdr = hdr;
+		ropt->state = CCP_OPT_NONE;
+		list_add_tail(&ropt->entry, &ccp->ropt_list);
+
+		data += ropt->len;
+		size -= ropt->len;
+	}
+	
+	if (conf_ppp_verbose)
+		log_ppp_info2("recv [CCP ConfReq id=%x", ccp->fsm.recv_id);
+
+	list_for_each_entry(ropt, &ccp->ropt_list, entry) {
+		list_for_each_entry(lopt, &ccp->options, entry) {
+			if (lopt->id == ropt->hdr->id) {
+				if (conf_ppp_verbose) {
+					log_ppp_info2(" ");
+					lopt->h->print(log_ppp_info2, lopt, (uint8_t*)ropt->hdr);
+				}
+				r = lopt->h->recv_conf_req(ccp, lopt, (uint8_t*)ropt->hdr);
+				if (ack) {
+					lopt->state = CCP_OPT_REJ;
+					ropt->state = CCP_OPT_REJ;
+				} else	{
+					/*if (lopt->state == CCP_OPT_NAK && r == CCP_OPT_ACK)
+						ccp->need_req = 1;*/
+					lopt->state = r;
+					ropt->state = r;
+				}
+				ropt->lopt = lopt;
+				if (r < ret)
+					ret = r;
+				break;
+			}
+		}
+		if (ropt->state == CCP_OPT_ACK || ropt->state == CCP_OPT_NAK)
+			ack = 1;
+		else if (!ropt->lopt) {
+			if (conf_ppp_verbose) {
+				log_ppp_info2(" ");
+				print_ropt(ropt);
+			}
+			ropt->state = CCP_OPT_REJ;
+			ret = CCP_OPT_REJ;
+		}
+	}
+
+	if (conf_ppp_verbose)
+		log_ppp_info2("]\n");
+
+	/*list_for_each_entry(lopt,&ccp->options,entry)
+	{
+		if (lopt->state==CCP_OPT_NONE)
+		{
+			r=lopt->h->recv_conf_req(ccp,lopt,NULL);
+			lopt->state=r;
+			if (r<ret) ret=r;
+		}
+	}*/
+
+	return ret;
+}
+
+static void ccp_free_conf_req(struct ppp_ccp_t *ccp)
+{
+	struct recv_opt_t *ropt;
+
+	while (!list_empty(&ccp->ropt_list)) {
+		ropt = list_entry(ccp->ropt_list.next, typeof(*ropt), entry);
+		list_del(&ropt->entry);
+		_free(ropt);
+	}
+}
+
+static int ccp_recv_conf_rej(struct ppp_ccp_t *ccp, uint8_t *data, int size)
+{
+	struct ccp_opt_hdr_t *hdr;
+	struct ccp_option_t *lopt;
+	int res = 0;
+
+	if (conf_ppp_verbose)
+		log_ppp_info2("recv [CCP ConfRej id=%x", ccp->fsm.recv_id);
+
+	if (ccp->fsm.recv_id != ccp->fsm.id) {
+		if (conf_ppp_verbose)
+			log_ppp_info2(": id mismatch ]\n");
+		return 0;
+	}
+
+	while (size > 0) {
+		hdr = (struct ccp_opt_hdr_t *)data;
+		
+		list_for_each_entry(lopt, &ccp->options, entry) {
+			if (lopt->id == hdr->id) {
+				if (!lopt->h->recv_conf_rej)
+					res = -1;
+				else if (lopt->h->recv_conf_rej(ccp, lopt, data))
+					res = -1;
+				break;
+			}
+		}
+
+		data += hdr->len;
+		size -= hdr->len;
+	}
+
+	if (conf_ppp_verbose)
+		log_ppp_info2("]\n");
+
+	return res;
+}
+
+static int ccp_recv_conf_nak(struct ppp_ccp_t *ccp, uint8_t *data, int size)
+{
+	struct ccp_opt_hdr_t *hdr;
+	struct ccp_option_t *lopt;
+	int res = 0;
+
+	if (conf_ppp_verbose)
+		log_ppp_info2("recv [CCP ConfNak id=%x", ccp->fsm.recv_id);
+
+	if (ccp->fsm.recv_id != ccp->fsm.id) {
+		if (conf_ppp_verbose)
+			log_ppp_info2(": id mismatch ]\n");
+		return 0;
+	}
+
+	while (size > 0) {
+		hdr = (struct ccp_opt_hdr_t *)data;
+		
+		list_for_each_entry(lopt, &ccp->options, entry) {
+			if (lopt->id == hdr->id) {
+				if (conf_ppp_verbose) {
+					log_ppp_info2(" ");
+					lopt->h->print(log_ppp_info2, lopt, data);
+				}
+				if (lopt->h->recv_conf_nak && lopt->h->recv_conf_nak(ccp, lopt, data))
+					res = -1;
+				//lopt->state = CCP_OPT_NAK;
+				//ccp->need_req = 1;
+				break;
+			}
+		}
+
+		data += hdr->len;
+		size -= hdr->len;
+	}
+
+	if (conf_ppp_verbose)
+		log_ppp_info2("]\n");
+
+	return res;
+}
+
+static int ccp_recv_conf_ack(struct ppp_ccp_t *ccp, uint8_t *data, int size)
+{
+	struct ccp_opt_hdr_t *hdr;
+	struct ccp_option_t *lopt;
+	int res = 0;
+
+	if (conf_ppp_verbose)
+		log_ppp_info2("recv [CCP ConfAck id=%x", ccp->fsm.recv_id);
+
+	if (ccp->fsm.recv_id != ccp->fsm.id) {
+		if (conf_ppp_verbose)
+			log_ppp_info2(": id mismatch ]\n");
+		return 0;
+	}
+
+	while (size > 0) {
+		hdr = (struct ccp_opt_hdr_t *)data;
+		
+		list_for_each_entry(lopt, &ccp->options, entry) {
+			if (lopt->id == hdr->id) {
+				if (conf_ppp_verbose) {
+					log_ppp_info2(" ");
+					lopt->h->print(log_ppp_info2,lopt,data);
+				}
+				if (!lopt->h->recv_conf_ack)
+					break;
+				if (lopt->h->recv_conf_ack(ccp, lopt, data))
+					res = -1;
+				break;
+			}
+		}
+
+		data += hdr->len;
+		size -= hdr->len;
+	}
+
+	if (conf_ppp_verbose)
+		log_ppp_info2("]\n");
+
+	return res;
+}
+
+static void send_term_req(struct ppp_fsm_t *fsm)
+{
+	struct ppp_ccp_t *ccp = container_of(fsm, typeof(*ccp), fsm);
+	struct ccp_hdr_t hdr = {
+		.proto = htons(PPP_CCP),
+		.code = TERMREQ,
+		.id = ++ccp->fsm.id,
+		.len = htons(4),
+	};
+
+	if (conf_ppp_verbose)
+		log_ppp_info2("send [CCP TermReq id=%i]\n", hdr.id);
+
+	ppp_chan_send(ccp->ppp, &hdr, 6);
+}
+
+static void send_term_ack(struct ppp_fsm_t *fsm)
+{
+	struct ppp_ccp_t *ccp = container_of(fsm, typeof(*ccp), fsm);
+	struct ccp_hdr_t hdr = {
+		.proto = htons(PPP_CCP),
+		.code = TERMACK,
+		.id = ccp->fsm.recv_id,
+		.len = htons(4),
+	};
+
+	if (conf_ppp_verbose)
+		log_ppp_info2("send [CCP TermAck id=%i]\n", hdr.id);
+	
+	ppp_chan_send(ccp->ppp, &hdr, 6);
+}
+
+static void ccp_recv(struct ppp_handler_t*h)
+{
+	struct ccp_hdr_t *hdr;
+	struct ppp_ccp_t *ccp = container_of(h, typeof(*ccp), hnd);
+	int r;
+
+	if (ccp->fsm.fsm_state == FSM_Initial || ccp->fsm.fsm_state == FSM_Closed || ccp->ppp->terminating) {
+		if (conf_ppp_verbose)
+			log_ppp_warn("CCP: discarding packet\n");
+		if (ccp->fsm.fsm_state == FSM_Closed || !conf_ccp)
+			lcp_send_proto_rej(ccp->ppp, PPP_CCP);
+		return;
+	}
+
+	if (ccp->ppp->unit_buf_size < PPP_HEADERLEN + 2) {
+		log_ppp_warn("CCP: short packet received\n");
+		return;
+	}
+
+	hdr = (struct ccp_hdr_t *)ccp->ppp->unit_buf;
+	if (ntohs(hdr->len) < PPP_HEADERLEN) {
+		log_ppp_warn("CCP: short packet received\n");
+		return;
+	}
+
+	ccp->fsm.recv_id = hdr->id;
+	switch(hdr->code) {
+		case CONFREQ:
+			r = ccp_recv_conf_req(ccp, (uint8_t*)(hdr + 1), ntohs(hdr->len) - PPP_HDRLEN);
+			switch(r) {
+				case CCP_OPT_ACK:
+					ppp_fsm_recv_conf_req_ack(&ccp->fsm);
+					break;
+				case CCP_OPT_NAK:
+					ppp_fsm_recv_conf_req_nak(&ccp->fsm);
+					break;
+				case CCP_OPT_REJ:
+					ppp_fsm_recv_conf_req_rej(&ccp->fsm);
+					break;
+			}
+			ccp_free_conf_req(ccp);
+			
+			if (r == CCP_OPT_ACK && ccp->passive) {
+				ccp->passive = 0;
+				send_conf_req(&ccp->fsm);
+			}
+			if (r == CCP_OPT_FAIL)
+				ppp_terminate(ccp->ppp, TERM_USER_ERROR, 0);
+			break;
+		case CONFACK:
+			if (ccp_recv_conf_ack(ccp, (uint8_t*)(hdr + 1), ntohs(hdr->len) - PPP_HDRLEN))
+				ppp_terminate(ccp->ppp, TERM_USER_ERROR, 0);
+			else {
+				ppp_fsm_recv_conf_ack(&ccp->fsm);
+				if (ccp->need_req)
+					send_conf_req(&ccp->fsm);
+			}
+			break;
+		case CONFNAK:
+			ccp_recv_conf_nak(ccp, (uint8_t*)(hdr + 1), ntohs(hdr->len) - PPP_HDRLEN);
+			ppp_fsm_recv_conf_rej(&ccp->fsm);
+			break;
+		case CONFREJ:
+			if (ccp_recv_conf_rej(ccp, (uint8_t*)(hdr + 1),ntohs(hdr->len) - PPP_HDRLEN))
+				ppp_terminate(ccp->ppp, TERM_USER_ERROR, 0);
+			else
+				ppp_fsm_recv_conf_rej(&ccp->fsm);
+			break;
+		case TERMREQ:
+			if (conf_ppp_verbose)
+				log_ppp_info2("recv [CCP TermReq id=%x]\n", hdr->id);
+			ppp_fsm_recv_term_req(&ccp->fsm);
+			ppp_fsm_close(&ccp->fsm);
+			break;
+		case TERMACK:
+			if (conf_ppp_verbose)
+				log_ppp_info2("recv [CCP TermAck id=%x]\n", hdr->id);
+			ppp_fsm_recv_term_ack(&ccp->fsm);
+			break;
+		case CODEREJ:
+			if (conf_ppp_verbose)
+				log_ppp_info2("recv [CCP CodeRej id=%x]\n", hdr->id);
+			ppp_fsm_recv_code_rej_bad(&ccp->fsm);
+			break;
+		default:
+			ppp_fsm_recv_unk(&ccp->fsm);
+			break;
+	}
+}
+
+static void ccp_recv_proto_rej(struct ppp_handler_t *h)
+{
+	struct ppp_ccp_t *ccp = container_of(h, typeof(*ccp), hnd);
+
+	if (ccp->fsm.fsm_state == FSM_Initial || ccp->fsm.fsm_state == FSM_Closed)
+		return;
+	
+	ppp_fsm_lower_down(&ccp->fsm);
+	ppp_fsm_close(&ccp->fsm);
+}
+
+int ccp_option_register(struct ccp_option_handler_t *h)
+{
+	/*struct ccp_option_drv_t *p;
+
+	list_for_each_entry(p,option_drv_list,entry)
+		if (p->id==h->id) 
+			return -1;*/
+	
+	list_add_tail(&h->entry,&option_handlers);
+
+	return 0;
+}
+
+struct ccp_option_t *ccp_find_option(struct ppp_t *ppp, struct ccp_option_handler_t *h)
+{
+	struct ppp_ccp_t *ccp = container_of(ppp_find_layer_data(ppp, &ccp_layer), typeof(*ccp), ld);
+	struct ccp_option_t *opt;
+	
+	list_for_each_entry(opt, &ccp->options, entry)
+		if (opt->h == h)
+			return opt;
+	
+	log_emerg("ccp: BUG: option not found\n");
+	abort();
+}
+
+static struct ppp_layer_t ccp_layer=
+{
+	.init   = ccp_layer_init,
+	.start  = ccp_layer_start,
+	.finish = ccp_layer_finish,
+	.free   = ccp_layer_free,
+};
+
+static void load_config(void)
+{
+	const char *opt;
+
+	opt = conf_get_opt("ppp", "ccp");
+	if (opt && atoi(opt) >= 0)
+		conf_ccp = atoi(opt);
+}
+
+static void __init ccp_init(void)
+{
+	ppp_register_layer("ccp", &ccp_layer);
+
+	load_config();
+	triton_event_register_handler(EV_CONFIG_RELOAD, (triton_event_func)load_config);
+}
+
diff --git a/accel-pppd/ppp/ppp_ccp.h b/accel-pppd/ppp/ppp_ccp.h
new file mode 100644
index 0000000..2c2dc6d
--- /dev/null
+++ b/accel-pppd/ppp/ppp_ccp.h
@@ -0,0 +1,96 @@
+#ifndef PPP_CCP_H
+#define PPP_CCP_H
+
+#include <stdint.h>
+
+#include "triton.h"
+#include "ppp_fsm.h"
+/*
+ * Options.
+ */
+
+#define CI_MPPE	18	  /* MPPE */
+
+struct ccp_hdr_t
+{
+	uint16_t proto;
+	uint8_t code;
+	uint8_t id;
+	uint16_t len;
+} __attribute__((packed));
+struct ccp_opt_hdr_t
+{
+	uint8_t id;
+	uint8_t len;
+} __attribute__((packed));
+struct ccp_opt8_t
+{
+	struct ccp_opt_hdr_t hdr;
+	uint8_t val;
+} __attribute__((packed));
+struct ccp_opt16_t
+{
+	struct ccp_opt_hdr_t hdr;
+	uint16_t val;
+} __attribute__((packed));
+struct ccp_opt32_t
+{
+	struct ccp_opt_hdr_t hdr;
+	uint32_t val;
+} __attribute__((packed));
+
+#define CCP_OPT_NONE  0
+#define CCP_OPT_ACK   1
+#define CCP_OPT_NAK  -1
+#define CCP_OPT_REJ  -2
+#define CCP_OPT_FAIL -3
+
+struct ppp_ccp_t;
+struct ccp_option_handler_t;
+
+struct ccp_option_t
+{
+	struct list_head entry;
+	int id;
+	int len;
+	int state;
+	struct ccp_option_handler_t *h;
+};
+
+struct ccp_option_handler_t
+{
+	struct list_head entry;
+	struct ccp_option_t* (*init)(struct ppp_ccp_t*);
+	int (*send_conf_req)(struct ppp_ccp_t*,struct ccp_option_t*,uint8_t*);
+	int (*send_conf_rej)(struct ppp_ccp_t*,struct ccp_option_t*,uint8_t*);
+	int (*send_conf_nak)(struct ppp_ccp_t*,struct ccp_option_t*,uint8_t*);
+	int (*recv_conf_req)(struct ppp_ccp_t*,struct ccp_option_t*,uint8_t*);
+	int (*recv_conf_rej)(struct ppp_ccp_t*,struct ccp_option_t*,uint8_t*);
+	int (*recv_conf_nak)(struct ppp_ccp_t*,struct ccp_option_t*,uint8_t*);
+	int (*recv_conf_ack)(struct ppp_ccp_t*,struct ccp_option_t*,uint8_t*);
+	void (*free)(struct ppp_ccp_t*,struct ccp_option_t*);
+	void (*print)(void (*print)(const char *fmt,...), struct ccp_option_t*,uint8_t*);
+};
+
+struct ppp_ccp_t
+{
+	struct ppp_layer_data_t ld;
+	struct ppp_handler_t hnd;
+	struct ppp_fsm_t fsm;
+	struct ppp_t *ppp;
+	struct list_head options;
+
+	struct list_head ropt_list; // last received ConfReq
+	int ropt_len;
+	
+	int conf_req_len;
+	int passive;
+	int started:1;
+	int need_req:1;
+};
+
+int ccp_option_register(struct ccp_option_handler_t *h);
+struct ccp_option_t *ccp_find_option(struct ppp_t *ppp, struct ccp_option_handler_t *h);
+
+#endif
+
diff --git a/accel-pppd/ppp/ppp_fsm.c b/accel-pppd/ppp/ppp_fsm.c
new file mode 100644
index 0000000..c6bc430
--- /dev/null
+++ b/accel-pppd/ppp/ppp_fsm.c
@@ -0,0 +1,544 @@
+#include <arpa/inet.h>
+#include <stdlib.h>
+
+#include "triton.h"
+
+#include "ppp.h"
+#include "ppp_fsm.h"
+#include "ppp_lcp.h"
+#include "log.h"
+#include "events.h"
+
+#include "memdebug.h"
+
+static int conf_max_terminate = 2;
+static int conf_max_configure = 10;
+static int conf_max_failure = 10;
+static int conf_timeout = 5;
+
+void send_term_req(struct ppp_fsm_t *layer);
+void send_term_ack(struct ppp_fsm_t *layer);
+void send_echo_reply(struct ppp_fsm_t *layer);
+
+static void init_req_counter(struct ppp_fsm_t *layer,int timeout);
+static void zero_req_counter(struct ppp_fsm_t *layer);
+static void restart_timer_func(struct triton_timer_t *t);
+static void stop_timer(struct ppp_fsm_t *fsm);
+
+void ppp_fsm_init(struct ppp_fsm_t *layer)
+{
+	layer->fsm_state = FSM_Initial;
+	layer->restart_timer.expire = restart_timer_func;
+	layer->restart_timer.period = conf_timeout * 1000;
+	layer->restart_counter = 0;
+
+	layer->max_terminate = conf_max_terminate;
+	layer->max_configure = conf_max_configure;
+	layer->max_failure = conf_max_failure;
+	layer->timeout = conf_timeout;
+}
+void ppp_fsm_free(struct ppp_fsm_t *layer)
+{
+	stop_timer(layer);
+}
+
+int ppp_fsm_lower_up(struct ppp_fsm_t *layer)
+{
+	switch(layer->fsm_state)
+	{
+		case FSM_Initial:
+			layer->fsm_state=FSM_Closed;
+			break;
+		case FSM_Starting:
+			//if (layer->init_req_cnt) layer->init_req_cnt(layer);
+			init_req_counter(layer,layer->max_configure);
+			--layer->restart_counter;
+			if (layer->send_conf_req) 
+				if (layer->send_conf_req(layer))
+					return -1;
+			layer->fsm_state=FSM_Req_Sent;
+			break;
+		default:
+			break;
+	}
+	return 0;
+}
+
+void ppp_fsm_lower_down(struct ppp_fsm_t *layer)
+{
+	switch(layer->fsm_state)
+	{
+		case FSM_Closed:
+		case FSM_Closing:
+			layer->fsm_state=FSM_Initial;
+			break;
+		case FSM_Stopped:
+			if (layer->layer_started) layer->layer_started(layer);
+			layer->fsm_state=FSM_Starting;
+			break;
+		case FSM_Stopping:
+		case FSM_Req_Sent:
+		case FSM_Ack_Rcvd:
+		case FSM_Ack_Sent:
+			layer->fsm_state=FSM_Starting;
+			break;
+		case FSM_Opened:
+			if (layer->layer_down) layer->layer_down(layer);
+			layer->fsm_state=FSM_Starting;
+			break;
+		default:
+			break;
+	}
+}
+
+int ppp_fsm_open(struct ppp_fsm_t *layer)
+{
+	switch(layer->fsm_state)
+	{
+		case FSM_Initial:
+			if (layer->layer_started) layer->layer_started(layer);
+			layer->fsm_state=FSM_Starting;
+			break;
+		case FSM_Starting:
+			break;
+		case FSM_Closed:
+			//if (layer->init_req_cnt) layer->init_req_cnt(layer);
+			init_req_counter(layer,layer->max_configure);
+			--layer->restart_counter;
+			if (layer->send_conf_req)
+				if (layer->send_conf_req(layer))
+					return -1;
+			layer->fsm_state=FSM_Req_Sent;
+			break;
+		case FSM_Closing:
+		case FSM_Stopping:
+		case FSM_Stopped:
+		case FSM_Opened:
+			ppp_fsm_lower_down(layer);
+			ppp_fsm_lower_up(layer);
+			break;
+		default:
+			break;
+	}
+	return 0;
+}
+
+void ppp_fsm_close(struct ppp_fsm_t *layer)
+{
+	switch(layer->fsm_state)
+	{
+		case FSM_Starting:
+			stop_timer(layer);
+			layer->fsm_state=FSM_Initial;
+			if (layer->layer_finished) layer->layer_finished(layer);
+			break;
+		case FSM_Stopped:
+			layer->fsm_state=FSM_Closed;
+			stop_timer(layer);
+			break;
+		case FSM_Stopping:
+			layer->fsm_state=FSM_Closing;
+			break;
+		case FSM_Opened:
+			if (layer->layer_down) layer->layer_down(layer);
+		case FSM_Req_Sent:
+		case FSM_Ack_Rcvd:
+		case FSM_Ack_Sent:
+			//if (layer->init_req_cnt) layer->init_req_cnt(layer);
+			init_req_counter(layer,layer->max_terminate);
+			layer->send_term_req(layer);
+			layer->fsm_state=FSM_Closing;
+			break;
+		default:
+			break;
+	}
+}
+
+void ppp_fsm_timeout0(struct ppp_fsm_t *layer)
+{
+	switch(layer->fsm_state)
+	{
+		case FSM_Closing:
+		case FSM_Stopping:
+			--layer->restart_counter;
+			layer->send_term_req(layer);
+			break;
+		case FSM_Ack_Rcvd:
+			layer->fsm_state=FSM_Req_Sent;
+		case FSM_Req_Sent:
+		case FSM_Ack_Sent:
+			--layer->restart_counter;
+			--layer->id;
+			if (layer->send_conf_req) layer->send_conf_req(layer);
+			break;
+		default:
+			break;
+	}
+}
+
+void ppp_fsm_timeout1(struct ppp_fsm_t *layer)
+{
+	switch(layer->fsm_state)
+	{
+		case FSM_Closing:
+			stop_timer(layer);
+			layer->fsm_state=FSM_Closed;
+			if (layer->layer_finished) layer->layer_finished(layer);
+			break;
+		case FSM_Stopping:
+			stop_timer(layer);
+			layer->fsm_state=FSM_Stopped;
+			if (layer->layer_finished) layer->layer_finished(layer);
+			break;
+		case FSM_Ack_Rcvd:
+		case FSM_Req_Sent:
+		case FSM_Ack_Sent:
+			stop_timer(layer);
+			layer->fsm_state=FSM_Stopped;
+			if (layer->layer_finished) layer->layer_finished(layer);
+			break;
+		default:
+			break;
+	}
+}
+
+void ppp_fsm_recv_conf_req_ack(struct ppp_fsm_t *layer)
+{
+	switch(layer->fsm_state)
+	{
+		case FSM_Closed:
+			layer->send_term_ack(layer);
+			break;
+		case FSM_Stopped:
+			//if (layer->init_req_cnt) layer->init_req_cnt(layer);
+			init_req_counter(layer,layer->max_configure);
+			--layer->restart_counter;
+			if (layer->send_conf_req) layer->send_conf_req(layer);
+		case FSM_Req_Sent:
+		case FSM_Ack_Sent:
+			if (layer->send_conf_ack) layer->send_conf_ack(layer);
+			layer->fsm_state=FSM_Ack_Sent;
+			break;
+		case FSM_Ack_Rcvd:
+			if (layer->send_conf_ack) layer->send_conf_ack(layer);
+			stop_timer(layer);
+			if (layer->layer_up) layer->layer_up(layer);
+			layer->fsm_state=FSM_Opened;
+			break;
+		case FSM_Opened:
+			if (layer->layer_down) layer->layer_down(layer);
+			--layer->restart_counter;
+			if (layer->send_conf_req) layer->send_conf_req(layer);
+			if (layer->send_conf_ack) layer->send_conf_ack(layer);
+			layer->fsm_state=FSM_Ack_Sent;
+			break;
+		default:
+			break;
+	}
+}
+
+void ppp_fsm_recv_conf_req_nak(struct ppp_fsm_t *layer)
+{
+	switch(layer->fsm_state)
+	{
+		case FSM_Closed:
+			layer->send_term_ack(layer);
+			break;
+		case FSM_Stopped:
+			//if (layer->init_req_cnt) layer->init_req_cnt(layer);
+			init_req_counter(layer,layer->max_configure);
+			--layer->restart_counter;
+			if (layer->send_conf_req) layer->send_conf_req(layer);
+		case FSM_Ack_Sent:
+			if (layer->send_conf_nak) layer->send_conf_nak(layer);
+			layer->fsm_state=FSM_Req_Sent;
+			break;
+		case FSM_Req_Sent:
+		case FSM_Ack_Rcvd:
+			if (++layer->conf_failure == layer->max_failure) {
+				if (layer->layer_finished) layer->layer_finished(layer);
+				return;
+			}
+			if (layer->send_conf_nak) layer->send_conf_nak(layer);
+			break;
+		case FSM_Opened:
+			if (layer->layer_down) layer->layer_down(layer);
+			--layer->restart_counter;
+			if (layer->send_conf_req) layer->send_conf_req(layer);
+			if (layer->send_conf_nak) layer->send_conf_nak(layer);
+			layer->fsm_state=FSM_Req_Sent;
+			break;
+		default:
+			break;
+	}
+}
+
+void ppp_fsm_recv_conf_req_rej(struct ppp_fsm_t *layer)
+{
+	switch(layer->fsm_state)
+	{
+		case FSM_Closed:
+			layer->send_term_ack(layer);
+			break;
+		case FSM_Stopped:
+			//if (layer->init_req_cnt) layer->init_req_cnt(layer);
+			init_req_counter(layer,layer->max_configure);
+			--layer->restart_counter;
+			if (layer->send_conf_req) layer->send_conf_req(layer);
+		case FSM_Ack_Sent:
+			if (++layer->conf_failure == layer->max_failure) {
+				if (layer->layer_down) layer->layer_down(layer);
+				return;
+			}
+			if (layer->send_conf_rej) layer->send_conf_rej(layer);
+			layer->fsm_state=FSM_Req_Sent;
+			break;
+		case FSM_Req_Sent:
+		case FSM_Ack_Rcvd:
+			if (++layer->conf_failure == layer->max_failure) {
+				if (layer->layer_finished) layer->layer_finished(layer);
+				return;
+			}
+			if (layer->send_conf_rej) layer->send_conf_rej(layer);
+			break;
+		case FSM_Opened:
+			if (layer->layer_down) layer->layer_down(layer);
+			--layer->restart_counter;
+			if (layer->send_conf_req) layer->send_conf_req(layer);
+			if (layer->send_conf_rej) layer->send_conf_rej(layer);
+			layer->fsm_state=FSM_Req_Sent;
+			break;
+		default:
+			break;
+	}
+}
+
+void ppp_fsm_recv_conf_ack(struct ppp_fsm_t *layer)
+{
+	switch(layer->fsm_state)
+	{
+		case FSM_Closed:
+		case FSM_Stopped:
+			layer->send_term_ack(layer);
+			break;
+		case FSM_Req_Sent:
+			//if (layer->init_req_cnt) layer->init_req_cnt(layer);
+			init_req_counter(layer,layer->max_configure);
+			layer->fsm_state=FSM_Ack_Rcvd;
+			break;
+		case FSM_Ack_Rcvd:
+			--layer->restart_counter;
+			if (layer->send_conf_req) layer->send_conf_req(layer);
+			layer->fsm_state=FSM_Req_Sent;
+			break;
+		case FSM_Ack_Sent:
+			//if (layer->init_req_cnt) layer->init_req_cnt(layer);
+			//init_req_counter(layer,layer->max_configure);
+			//tlu
+			stop_timer(layer);
+			if (layer->layer_up) layer->layer_up(layer);
+			layer->fsm_state=FSM_Opened;
+			break;
+		case FSM_Opened:
+			if (layer->layer_down) layer->layer_down(layer);
+			--layer->restart_counter;
+			if (layer->send_conf_req) layer->send_conf_req(layer);
+			layer->fsm_state=FSM_Req_Sent;
+		default:
+			break;
+	}
+}
+
+void ppp_fsm_recv_conf_rej(struct ppp_fsm_t *layer)
+{
+	switch(layer->fsm_state)
+	{
+		case FSM_Closed:
+		case FSM_Stopped:
+			layer->send_term_ack(layer);
+			break;
+		case FSM_Req_Sent:
+			if (++layer->conf_failure == layer->max_failure) {
+				if (layer->layer_down) layer->layer_down(layer);
+				return;
+			}
+			//if (layer->init_req_cnt) layer->init_req_cnt(layer);
+			init_req_counter(layer,layer->max_failure);
+			--layer->restart_counter;
+			if (layer->send_conf_req) layer->send_conf_req(layer);
+			break;
+		case FSM_Ack_Rcvd:
+			--layer->restart_counter;
+			if (layer->send_conf_req) layer->send_conf_req(layer);
+			layer->fsm_state=FSM_Req_Sent;
+			break;
+		case FSM_Ack_Sent:
+			//if (layer->init_req_cnt) layer->init_req_cnt(layer);
+			init_req_counter(layer,layer->max_configure);
+			--layer->restart_counter;
+			if (layer->send_conf_req) layer->send_conf_req(layer);
+			break;
+		case FSM_Opened:
+			if (layer->layer_down) layer->layer_down(layer);
+			--layer->restart_counter;
+			if (layer->send_conf_req) layer->send_conf_req(layer);
+			layer->fsm_state=FSM_Req_Sent;
+			break;
+		default:
+			break;
+	}
+}
+
+void ppp_fsm_recv_term_req(struct ppp_fsm_t *layer)
+{
+	switch(layer->fsm_state)
+	{
+		case FSM_Opened:
+			if (layer->layer_down) layer->layer_down(layer);
+			//send_term_req(layer);
+			layer->send_term_ack(layer);
+			//if (layer->zero_req_cnt) layer->zero_req_cnt(layer);
+			zero_req_counter(layer);
+			layer->fsm_state=FSM_Stopping;
+			break;
+		case FSM_Req_Sent:
+		case FSM_Ack_Rcvd:
+		case FSM_Ack_Sent:
+			layer->send_term_ack(layer);
+			layer->fsm_state=FSM_Req_Sent;
+			break;
+		default:
+			layer->send_term_ack(layer);
+			break;
+	}
+}
+
+void ppp_fsm_recv_term_ack(struct ppp_fsm_t *layer)
+{
+	stop_timer(layer);
+	switch(layer->fsm_state)
+	{
+		case FSM_Closing:
+			layer->fsm_state=FSM_Closed;
+			if (layer->layer_finished) layer->layer_finished(layer);
+			break;
+		case FSM_Stopping:
+			layer->fsm_state=FSM_Stopped;
+			if (layer->layer_finished) layer->layer_finished(layer);
+			break;
+		case FSM_Ack_Rcvd:
+			layer->fsm_state=FSM_Req_Sent;
+			break;
+		case FSM_Opened:
+			if (layer->layer_down) layer->layer_down(layer);
+			--layer->restart_counter;
+			if (layer->send_conf_req) layer->send_conf_req(layer);
+			layer->fsm_state=FSM_Req_Sent;
+			break;
+		default:
+			break;
+	}
+}
+
+void ppp_fsm_recv_unk(struct ppp_fsm_t *layer)
+{
+	if (layer->send_code_rej) layer->send_code_rej(layer);
+}
+
+void ppp_fsm_recv_code_rej_perm(struct ppp_fsm_t *layer)
+{
+	switch(layer->fsm_state)
+	{
+		case FSM_Ack_Rcvd:
+			layer->fsm_state=FSM_Req_Sent;
+			break;
+		default:
+			break;
+	}
+}
+
+void ppp_fsm_recv_code_rej_bad(struct ppp_fsm_t *layer)
+{
+	switch(layer->fsm_state)
+	{
+		case FSM_Opened:
+			if (layer->layer_down) layer->layer_down(layer);
+			--layer->restart_counter;
+			layer->send_term_req(layer);
+			layer->fsm_state=FSM_Stopping;
+			break;
+		case FSM_Closing:
+			layer->fsm_state=FSM_Closed;
+			if (layer->layer_finished) layer->layer_finished(layer);
+			break;
+		case FSM_Stopping:
+		case FSM_Req_Sent:
+		case FSM_Ack_Rcvd:
+		case FSM_Ack_Sent:
+			layer->fsm_state=FSM_Stopped;
+			if (layer->layer_finished) layer->layer_finished(layer);
+			break;
+		default:
+			break;
+	}
+}
+
+static void stop_timer(struct ppp_fsm_t *fsm)
+{
+	if (fsm->restart_timer.tpd)
+		triton_timer_del(&fsm->restart_timer);
+}
+static void init_req_counter(struct ppp_fsm_t *layer,int timeout)
+{
+	layer->restart_counter = timeout;
+
+	if (!layer->restart_timer.tpd)
+		triton_timer_add(layer->ppp->ctrl->ctx, &layer->restart_timer, 0);
+}
+static void zero_req_counter(struct ppp_fsm_t *layer)
+{
+	layer->restart_counter=0;
+	
+	if (!layer->restart_timer.tpd)
+		triton_timer_add(layer->ppp->ctrl->ctx, &layer->restart_timer, 0);
+}
+
+static void restart_timer_func(struct triton_timer_t *t)
+{
+	struct ppp_fsm_t *layer = container_of(t, typeof(*layer), restart_timer);
+
+	log_ppp_debug("fsm timeout\n");
+
+	if (layer->restart_counter>0)
+		ppp_fsm_timeout0(layer);
+	else
+		ppp_fsm_timeout1(layer);
+}
+
+static void load_config(void)
+{
+	char *opt;
+
+	opt = conf_get_opt("ppp", "max-terminate");
+	if (opt && atoi(opt) > 0)
+		conf_max_terminate = atoi(opt);
+
+	opt = conf_get_opt("ppp", "max-configure");
+	if (opt && atoi(opt) > 0)
+		conf_max_configure = atoi(opt);
+
+	opt = conf_get_opt("ppp", "max-failure");
+	if (opt && atoi(opt) > 0)
+		conf_max_failure = atoi(opt);
+
+	opt = conf_get_opt("ppp", "timeout");
+	if (opt && atoi(opt) > 0)
+		conf_timeout = atoi(opt);
+}
+
+void __init fsm_init(void)
+{
+	load_config();
+	triton_event_register_handler(EV_CONFIG_RELOAD, (triton_event_func)load_config);
+}
+
diff --git a/accel-pppd/ppp/ppp_fsm.h b/accel-pppd/ppp/ppp_fsm.h
new file mode 100644
index 0000000..6010240
--- /dev/null
+++ b/accel-pppd/ppp/ppp_fsm.h
@@ -0,0 +1,72 @@
+#ifndef PPP_FSM_H
+#define PPP_FSM_H
+
+typedef enum {FSM_Initial=0,FSM_Starting,FSM_Closed,FSM_Stopped,FSM_Closing,FSM_Stopping,FSM_Req_Sent,FSM_Ack_Rcvd,FSM_Ack_Sent,FSM_Opened} FSM_STATE;
+/*
+ *  CP (LCP, IPCP, etc.) codes.
+ */
+#define CONFREQ		1	/* Configuration Request */
+#define CONFACK		2	/* Configuration Ack */
+#define CONFNAK		3	/* Configuration Nak */
+#define CONFREJ		4	/* Configuration Reject */
+#define TERMREQ		5	/* Termination Request */
+#define TERMACK		6	/* Termination Ack */
+#define CODEREJ		7	/* Code Reject */
+#define PROTOREJ	8	/* Code Reject */
+#define ECHOREQ		9	/* Echo Request */
+#define ECHOREP		10	/* Echo Reply */
+#define	IDENT		  12	/* Identification */
+
+struct ppp_t;
+
+struct ppp_fsm_t
+{
+	struct ppp_t *ppp;
+	FSM_STATE fsm_state;
+	uint16_t proto;
+	
+	struct triton_timer_t restart_timer;
+	int restart_counter;
+	int max_terminate;
+	int max_configure;
+	int max_failure;
+	int timeout;
+	int conf_failure;
+
+	int id;
+	int recv_id;
+
+	//fsm handling
+	void (*layer_up)(struct ppp_fsm_t*);
+	void (*layer_down)(struct ppp_fsm_t*);
+	void (*layer_started)(struct ppp_fsm_t*);
+	void (*layer_finished)(struct ppp_fsm_t*);
+	int (*send_conf_req)(struct ppp_fsm_t*);
+	void (*send_conf_ack)(struct ppp_fsm_t*);
+	void (*send_conf_nak)(struct ppp_fsm_t*);
+	void (*send_conf_rej)(struct ppp_fsm_t*);
+	void (*send_code_rej)(struct ppp_fsm_t*);
+	void (*send_term_req)(struct ppp_fsm_t*);
+	void (*send_term_ack)(struct ppp_fsm_t*);
+};
+
+void ppp_fsm_init(struct ppp_fsm_t*);
+void ppp_fsm_free(struct ppp_fsm_t*);
+
+int ppp_fsm_lower_up(struct ppp_fsm_t*);
+void ppp_fsm_lower_down(struct ppp_fsm_t*);
+int ppp_fsm_open(struct ppp_fsm_t*);
+void ppp_fsm_close(struct ppp_fsm_t*);
+void ppp_fsm_timeout0(struct ppp_fsm_t *layer);
+void ppp_fsm_timeout1(struct ppp_fsm_t *layer);
+void ppp_fsm_recv_conf_req_ack(struct ppp_fsm_t *layer);
+void ppp_fsm_recv_conf_req_nak(struct ppp_fsm_t *layer);
+void ppp_fsm_recv_conf_req_rej(struct ppp_fsm_t *layer);
+void ppp_fsm_recv_conf_ack(struct ppp_fsm_t *layer);
+void ppp_fsm_recv_conf_rej(struct ppp_fsm_t *layer);
+void ppp_fsm_recv_term_req(struct ppp_fsm_t *layer);
+void ppp_fsm_recv_term_ack(struct ppp_fsm_t *layer);
+void ppp_fsm_recv_unk(struct ppp_fsm_t *layer);
+void ppp_fsm_recv_code_rej_bad(struct ppp_fsm_t *layer);
+
+#endif
diff --git a/accel-pppd/ppp/ppp_ipcp.c b/accel-pppd/ppp/ppp_ipcp.c
new file mode 100644
index 0000000..7cdcdbc
--- /dev/null
+++ b/accel-pppd/ppp/ppp_ipcp.c
@@ -0,0 +1,665 @@
+#include <stdlib.h>
+#include <string.h>
+#include <sys/socket.h>
+#include <arpa/inet.h>
+#include "linux_ppp.h"
+
+#include "triton.h"
+
+#include "log.h"
+
+#include "ppp.h"
+#include "ppp_ipcp.h"
+
+#include "memdebug.h"
+
+struct recv_opt_t
+{
+	struct list_head entry;
+	struct ipcp_opt_hdr_t *hdr;
+	int len;
+	int state;
+	struct ipcp_option_t *lopt;
+};
+
+static LIST_HEAD(option_handlers);
+
+static void ipcp_layer_up(struct ppp_fsm_t*);
+static void ipcp_layer_down(struct ppp_fsm_t*);
+static int send_conf_req(struct ppp_fsm_t*);
+static void send_conf_ack(struct ppp_fsm_t*);
+static void send_conf_nak(struct ppp_fsm_t*);
+static void send_conf_rej(struct ppp_fsm_t*);
+static void ipcp_recv(struct ppp_handler_t*);
+static void send_term_req(struct ppp_fsm_t *fsm);
+static void send_term_ack(struct ppp_fsm_t *fsm);
+
+static void ipcp_options_init(struct ppp_ipcp_t *ipcp)
+{
+	struct ipcp_option_t *lopt;
+	struct ipcp_option_handler_t *h;
+
+	ipcp->conf_req_len = sizeof(struct ipcp_hdr_t);
+	
+	list_for_each_entry(h,&option_handlers,entry) {
+		lopt = h->init(ipcp);
+		if (lopt) {
+			lopt->h = h;
+			list_add_tail(&lopt->entry, &ipcp->options);
+			ipcp->conf_req_len += lopt->len;
+		}
+	}
+}
+
+static void ipcp_options_free(struct ppp_ipcp_t *ipcp)
+{
+	struct ipcp_option_t *lopt;
+
+	while (!list_empty(&ipcp->options)) {
+		lopt = list_entry(ipcp->options.next, typeof(*lopt), entry);
+		list_del(&lopt->entry);
+		lopt->h->free(ipcp, lopt);
+	}
+}
+
+static struct ppp_layer_data_t *ipcp_layer_init(struct ppp_t *ppp)
+{
+	struct ppp_ipcp_t *ipcp = _malloc(sizeof(*ipcp));
+	memset(ipcp, 0, sizeof(*ipcp));
+	
+	log_ppp_debug("ipcp_layer_init\n");
+
+	ipcp->ppp = ppp;
+	ipcp->fsm.ppp = ppp;
+	
+	ipcp->hnd.proto = PPP_IPCP;
+	ipcp->hnd.recv = ipcp_recv;
+	
+	ppp_register_unit_handler(ppp, &ipcp->hnd);
+
+	ipcp->fsm.proto = PPP_IPCP;
+	ppp_fsm_init(&ipcp->fsm);
+
+	ipcp->fsm.layer_up = ipcp_layer_up;
+	ipcp->fsm.layer_finished = ipcp_layer_down;
+	ipcp->fsm.send_conf_req = send_conf_req;
+	ipcp->fsm.send_conf_ack = send_conf_ack;
+	ipcp->fsm.send_conf_nak = send_conf_nak;
+	ipcp->fsm.send_conf_rej = send_conf_rej;
+	ipcp->fsm.send_term_req = send_term_req;
+	ipcp->fsm.send_term_ack = send_term_ack;
+
+	INIT_LIST_HEAD(&ipcp->options);
+	INIT_LIST_HEAD(&ipcp->ropt_list);
+
+	return &ipcp->ld;
+}
+
+int ipcp_layer_start(struct ppp_layer_data_t *ld)
+{
+	struct ppp_ipcp_t *ipcp = container_of(ld, typeof(*ipcp), ld);
+	
+	log_ppp_debug("ipcp_layer_start\n");
+
+	ipcp_options_init(ipcp);
+	ppp_fsm_lower_up(&ipcp->fsm);
+	if (ppp_fsm_open(&ipcp->fsm))
+		return -1;
+	
+	return 0;
+}
+
+void ipcp_layer_finish(struct ppp_layer_data_t *ld)
+{
+	struct ppp_ipcp_t *ipcp = container_of(ld, typeof(*ipcp), ld);
+	
+	log_ppp_debug("ipcp_layer_finish\n");
+
+	ipcp->fsm.fsm_state = FSM_Closed;
+	
+	log_ppp_debug("ipcp_layer_finished\n");
+	ppp_layer_finished(ipcp->ppp, &ipcp->ld);
+}
+
+void ipcp_layer_free(struct ppp_layer_data_t *ld)
+{
+	struct ppp_ipcp_t *ipcp = container_of(ld, typeof(*ipcp), ld);
+	
+	log_ppp_debug("ipcp_layer_free\n");
+		
+	ppp_unregister_handler(ipcp->ppp, &ipcp->hnd);
+	ipcp_options_free(ipcp);
+	ppp_fsm_free(&ipcp->fsm);
+
+	_free(ipcp);
+}
+
+static void ipcp_layer_up(struct ppp_fsm_t *fsm)
+{
+	struct ppp_ipcp_t *ipcp = container_of(fsm, typeof(*ipcp), fsm);
+
+	log_ppp_debug("ipcp_layer_started\n");
+
+	if (!ipcp->started) {
+		ipcp->started = 1;
+		ppp_layer_started(ipcp->ppp, &ipcp->ld);
+	}
+}
+
+static void ipcp_layer_down(struct ppp_fsm_t *fsm)
+{
+	struct ppp_ipcp_t *ipcp = container_of(fsm, typeof(*ipcp), fsm);
+
+	log_ppp_debug("ipcp_layer_finished\n");
+
+	if (ipcp->started) {
+		ipcp->started = 0;
+	  ppp_layer_finished(ipcp->ppp, &ipcp->ld);
+	} else
+		ppp_terminate(ipcp->ppp, TERM_NAS_ERROR, 0);
+}
+
+static void print_ropt(struct recv_opt_t *ropt)
+{
+	int i;
+	uint8_t *ptr = (uint8_t*)ropt->hdr;
+
+	log_ppp_info2("<");
+	for (i = 0; i < ropt->len; i++) {
+		log_ppp_info2(" %x", ptr[i]);
+	}
+	log_ppp_info2(" >");
+}
+
+static int send_conf_req(struct ppp_fsm_t *fsm)
+{
+	struct ppp_ipcp_t *ipcp = container_of(fsm, typeof(*ipcp), fsm);
+	uint8_t *buf = _malloc(ipcp->conf_req_len), *ptr = buf;
+	struct ipcp_hdr_t *ipcp_hdr = (struct ipcp_hdr_t*)ptr;
+	struct ipcp_option_t *lopt;
+	int n;
+
+	ipcp_hdr->proto = htons(PPP_IPCP);
+	ipcp_hdr->code = CONFREQ;
+	ipcp_hdr->id = ++ipcp->fsm.id;
+	ipcp_hdr->len = 0;
+	
+	ptr += sizeof(*ipcp_hdr);
+
+	list_for_each_entry(lopt, &ipcp->options, entry) {
+		n = lopt->h->send_conf_req(ipcp, lopt, ptr);
+		if (n < 0)
+			return -1;
+		if (n) {
+			ptr += n;
+			lopt->print = 1;
+		} else
+			lopt->print = 0;
+	}
+
+	if (conf_ppp_verbose) {
+		log_ppp_info2("send [IPCP ConfReq id=%x", ipcp_hdr->id);
+		list_for_each_entry(lopt,&ipcp->options,entry) {
+			if (lopt->print) {
+				log_ppp_info2(" ");
+				lopt->h->print(log_ppp_info2, lopt, NULL);
+			}
+		}
+		log_ppp_info2("]\n");
+	}
+
+	ipcp_hdr->len = htons(ptr - buf - 2);
+	ppp_unit_send(ipcp->ppp, ipcp_hdr, ptr - buf);
+
+	_free(buf);
+
+	return 0;
+}
+
+static void send_conf_ack(struct ppp_fsm_t *fsm)
+{
+	struct ppp_ipcp_t *ipcp = container_of(fsm, typeof(*ipcp), fsm);
+	struct ipcp_hdr_t *hdr = (struct ipcp_hdr_t*)ipcp->ppp->unit_buf;
+
+	hdr->code = CONFACK;
+
+	if (conf_ppp_verbose)
+		log_ppp_info2("send [IPCP ConfAck id=%x]\n", ipcp->fsm.recv_id);
+
+	ppp_unit_send(ipcp->ppp, hdr, ntohs(hdr->len) + 2);
+}
+
+static void send_conf_nak(struct ppp_fsm_t *fsm)
+{
+	struct ppp_ipcp_t *ipcp = container_of(fsm, typeof(*ipcp), fsm);
+	uint8_t *buf = _malloc(ipcp->conf_req_len), *ptr = buf;
+	struct ipcp_hdr_t *ipcp_hdr = (struct ipcp_hdr_t*)ptr;
+	struct recv_opt_t *ropt;
+
+	if (conf_ppp_verbose)
+		log_ppp_info2("send [IPCP ConfNak id=%x", ipcp->fsm.recv_id);
+
+	ipcp_hdr->proto = htons(PPP_IPCP);
+	ipcp_hdr->code = CONFNAK;
+	ipcp_hdr->id = ipcp->fsm.recv_id;
+	ipcp_hdr->len = 0;
+	
+	ptr += sizeof(*ipcp_hdr);
+
+	list_for_each_entry(ropt, &ipcp->ropt_list, entry) {
+		if (ropt->state == IPCP_OPT_NAK) {
+			if (conf_ppp_verbose) {
+				log_ppp_info2(" ");
+				ropt->lopt->h->print(log_ppp_info2, ropt->lopt, NULL);
+			}
+			ptr += ropt->lopt->h->send_conf_nak(ipcp, ropt->lopt, ptr);
+		}
+	}
+	
+	if (conf_ppp_verbose)
+		log_ppp_info2("]\n");
+
+	ipcp_hdr->len = htons(ptr-buf-2);
+	ppp_unit_send(ipcp->ppp, ipcp_hdr, ptr - buf);
+
+	_free(buf);
+}
+
+static void send_conf_rej(struct ppp_fsm_t *fsm)
+{
+	struct ppp_ipcp_t *ipcp = container_of(fsm, typeof(*ipcp), fsm);
+	uint8_t *buf = _malloc(ipcp->ropt_len + sizeof(struct ipcp_hdr_t)), *ptr = buf;
+	struct ipcp_hdr_t *ipcp_hdr = (struct ipcp_hdr_t*)ptr;
+	struct recv_opt_t *ropt;
+
+	if (conf_ppp_verbose)
+		log_ppp_info2("send [IPCP ConfRej id=%x", ipcp->fsm.recv_id);
+
+	ipcp_hdr->proto = htons(PPP_IPCP);
+	ipcp_hdr->code = CONFREJ;
+	ipcp_hdr->id = ipcp->fsm.recv_id;
+	ipcp_hdr->len = 0;
+
+	ptr += sizeof(*ipcp_hdr);
+
+	list_for_each_entry(ropt, &ipcp->ropt_list, entry) {
+		if (ropt->state == IPCP_OPT_REJ) {
+			if (conf_ppp_verbose) {
+				log_ppp_info2(" ");
+				if (ropt->lopt)
+					ropt->lopt->h->print(log_ppp_info2, ropt->lopt, (uint8_t*)ropt->hdr);
+				else
+					print_ropt(ropt);
+			}
+			memcpy(ptr, ropt->hdr, ropt->len);
+			ptr += ropt->len;
+		}
+	}
+
+	if (conf_ppp_verbose)
+		log_ppp_info2("]\n");
+
+	ipcp_hdr->len = htons(ptr - buf - 2);
+	ppp_unit_send(ipcp->ppp, ipcp_hdr, ptr-buf);
+
+	_free(buf);
+}
+
+static int ipcp_recv_conf_req(struct ppp_ipcp_t *ipcp, uint8_t *data, int size)
+{
+	struct ipcp_opt_hdr_t *hdr;
+	struct recv_opt_t *ropt;
+	struct ipcp_option_t *lopt;
+	int r,ret = 1;
+
+	ipcp->ropt_len = size;
+
+	while (size > 0) {
+		hdr = (struct ipcp_opt_hdr_t *)data;
+
+		ropt = _malloc(sizeof(*ropt));
+		memset(ropt, 0, sizeof(*ropt));
+
+		if (hdr->len > size)
+			ropt->len = size;
+		else
+			ropt->len = hdr->len;
+		ropt->hdr = hdr;
+		ropt->state = IPCP_OPT_NONE;
+		list_add_tail(&ropt->entry, &ipcp->ropt_list);
+
+		data += ropt->len;
+		size -= ropt->len;
+	}
+	
+	list_for_each_entry(lopt, &ipcp->options, entry)
+		lopt->state=IPCP_OPT_NONE;
+
+	if (conf_ppp_verbose) {
+		log_ppp_info2("recv [IPCP ConfReq id=%x", ipcp->fsm.recv_id);
+
+		list_for_each_entry(ropt, &ipcp->ropt_list, entry) {
+			list_for_each_entry(lopt, &ipcp->options, entry) {
+				if (lopt->id == ropt->hdr->id) {
+					ropt->lopt = lopt;
+					log_ppp_info2(" ");
+					lopt->h->print(log_ppp_info2, lopt, (uint8_t*)ropt->hdr);
+					break;
+				}
+			}
+			if (!ropt->lopt) {
+				log_ppp_info2(" ");
+				print_ropt(ropt);
+			}
+		}
+		log_ppp_info2("]\n");
+	}
+
+	list_for_each_entry(ropt, &ipcp->ropt_list, entry) {
+		list_for_each_entry(lopt, &ipcp->options, entry) {
+			if (lopt->id == ropt->hdr->id) {
+				r = lopt->h->recv_conf_req(ipcp, lopt, (uint8_t*)ropt->hdr);
+				if (ipcp->ppp->stop_time)
+					return -1;
+				lopt->state = r;
+				ropt->state = r;
+				ropt->lopt = lopt;
+				if (r < ret)
+					ret = r;
+				break;
+			}	
+		}
+		if (!ropt->lopt) {
+			ropt->state = IPCP_OPT_REJ;
+			ret = IPCP_OPT_REJ;
+		}
+	}
+
+
+	/*list_for_each_entry(lopt,&ipcp->options,entry)
+	{
+		if (lopt->state==IPCP_OPT_NONE)
+		{
+			r=lopt->h->recv_conf_req(ipcp,lopt,NULL);
+			lopt->state=r;
+			if (r<ret) ret=r;
+		}
+	}*/
+
+	return ret;
+}
+
+static void ipcp_free_conf_req(struct ppp_ipcp_t *ipcp)
+{
+	struct recv_opt_t *ropt;
+
+	while (!list_empty(&ipcp->ropt_list)) {
+		ropt = list_entry(ipcp->ropt_list.next, typeof(*ropt), entry);
+		list_del(&ropt->entry);
+		_free(ropt);
+	}
+}
+
+static int ipcp_recv_conf_rej(struct ppp_ipcp_t *ipcp, uint8_t *data, int size)
+{
+	struct ipcp_opt_hdr_t *hdr;
+	struct ipcp_option_t *lopt;
+	int res = 0;
+
+	if (conf_ppp_verbose)
+		log_ppp_info2("recv [IPCP ConfRej id=%x", ipcp->fsm.recv_id);
+
+	if (ipcp->fsm.recv_id != ipcp->fsm.id) {
+		if (conf_ppp_verbose)
+			log_ppp_info2(": id mismatch ]\n");
+		return 0;
+	}
+
+	while (size > 0) {
+		hdr = (struct ipcp_opt_hdr_t *)data;
+		
+		list_for_each_entry(lopt, &ipcp->options, entry) {
+			if (lopt->id == hdr->id) {
+				if (!lopt->h->recv_conf_rej)
+					res = -1;
+				else if (lopt->h->recv_conf_rej(ipcp, lopt, data))
+					res = -1;
+				break;
+			}
+		}
+
+		data += hdr->len;
+		size -= hdr->len;
+	}
+
+	if (conf_ppp_verbose)
+		log_ppp_info2("]\n");
+
+	return res;
+}
+
+static int ipcp_recv_conf_nak(struct ppp_ipcp_t *ipcp, uint8_t *data, int size)
+{
+	struct ipcp_opt_hdr_t *hdr;
+	struct ipcp_option_t *lopt;
+	int res = 0;
+
+	if (conf_ppp_verbose)
+		log_ppp_info2("recv [IPCP ConfNak id=%x", ipcp->fsm.recv_id);
+
+	if (ipcp->fsm.recv_id != ipcp->fsm.id) {
+		if (conf_ppp_verbose)
+			log_ppp_info2(": id mismatch ]\n");
+		return 0;
+	}
+
+	while (size > 0) {
+		hdr = (struct ipcp_opt_hdr_t *)data;
+		
+		list_for_each_entry(lopt, &ipcp->options, entry) {
+			if (lopt->id == hdr->id) {
+				if (conf_ppp_verbose) {
+					log_ppp_info2(" ");
+					lopt->h->print(log_ppp_info2,lopt,data);
+				}
+				if (lopt->h->recv_conf_nak && lopt->h->recv_conf_nak(ipcp, lopt, data))
+					res =- 1;
+				break;
+			}
+		}
+
+		data += hdr->len;
+		size -= hdr->len;
+	}
+
+	if (conf_ppp_verbose)
+		log_ppp_info2("]\n");
+
+	return res;
+}
+
+static int ipcp_recv_conf_ack(struct ppp_ipcp_t *ipcp, uint8_t *data, int size)
+{
+	struct ipcp_opt_hdr_t *hdr;
+	struct ipcp_option_t *lopt;
+	int res = 0;
+
+	if (conf_ppp_verbose)
+		log_ppp_info2("recv [IPCP ConfAck id=%x", ipcp->fsm.recv_id);
+
+	if (ipcp->fsm.recv_id != ipcp->fsm.id) {
+		if (conf_ppp_verbose)
+			log_ppp_info2(": id mismatch ]\n");
+		return 0;
+	}
+
+	while (size > 0) {
+		hdr = (struct ipcp_opt_hdr_t *)data;
+		
+		list_for_each_entry(lopt, &ipcp->options, entry) {
+			if (lopt->id == hdr->id) {
+				if (conf_ppp_verbose) {
+					log_ppp_info2(" ");
+					lopt->h->print(log_ppp_info2, lopt, data);
+				}
+				if (!lopt->h->recv_conf_ack)
+					break;
+				if (lopt->h->recv_conf_ack(ipcp, lopt, data))
+					res = -1;
+				break;
+			}
+		}
+
+		data += hdr->len;
+		size -= hdr->len;
+	}
+
+	if (conf_ppp_verbose)
+		log_ppp_info2("]\n");
+
+	return res;
+}
+
+static void send_term_req(struct ppp_fsm_t *fsm)
+{
+	struct ppp_ipcp_t *ipcp = container_of(fsm, typeof(*ipcp), fsm);
+	struct ipcp_hdr_t hdr = {
+		.proto = htons(PPP_IPCP),
+		.code = TERMREQ,
+		.id = ++ipcp->fsm.id,
+		.len = htons(4),
+	};
+
+	if (conf_ppp_verbose)
+		log_ppp_info2("send [IPCP TermReq id=%i]\n", hdr.id);
+
+	ppp_unit_send(ipcp->ppp, &hdr, 6);
+}
+
+static void send_term_ack(struct ppp_fsm_t *fsm)
+{
+	struct ppp_ipcp_t *ipcp = container_of(fsm, typeof(*ipcp), fsm);
+	struct ipcp_hdr_t hdr = {
+		.proto = htons(PPP_IPCP),
+		.code = TERMACK,
+		.id = ipcp->fsm.recv_id,
+		.len = htons(4),
+	};
+
+	if (conf_ppp_verbose)
+		log_ppp_info2("send [IPCP TermAck id=%i]\n", hdr.id);
+	
+	ppp_unit_send(ipcp->ppp, &hdr, 6);
+}
+
+static void ipcp_recv(struct ppp_handler_t*h)
+{
+	struct ipcp_hdr_t *hdr;
+	struct ppp_ipcp_t *ipcp = container_of(h, typeof(*ipcp), hnd);
+	int r;
+
+	if (ipcp->fsm.fsm_state == FSM_Initial || ipcp->fsm.fsm_state == FSM_Closed || ipcp->ppp->terminating) {
+		if (conf_ppp_verbose)
+			log_ppp_warn("IPCP: discarding packet\n");
+		return;
+	}
+
+	if (ipcp->ppp->unit_buf_size < PPP_HEADERLEN + 2) {
+		log_ppp_warn("IPCP: short packet received\n");
+		return;
+	}
+
+	hdr = (struct ipcp_hdr_t *)ipcp->ppp->unit_buf;
+	if (ntohs(hdr->len) < PPP_HEADERLEN) {
+		log_ppp_warn("IPCP: short packet received\n");
+		return;
+	}
+
+	ipcp->fsm.recv_id = hdr->id;
+	switch(hdr->code) {
+		case CONFREQ:
+			r = ipcp_recv_conf_req(ipcp,(uint8_t*)(hdr + 1), ntohs(hdr->len) - PPP_HDRLEN);
+			if (ipcp->ppp->stop_time) {
+				ipcp_free_conf_req(ipcp);
+				return;
+			}
+			switch(r) {
+				case IPCP_OPT_ACK:
+					ppp_fsm_recv_conf_req_ack(&ipcp->fsm);
+					break;
+				case IPCP_OPT_NAK:
+					ppp_fsm_recv_conf_req_nak(&ipcp->fsm);
+					break;
+				case IPCP_OPT_REJ:
+					ppp_fsm_recv_conf_req_rej(&ipcp->fsm);
+					break;
+			}
+			ipcp_free_conf_req(ipcp);
+			if (r == IPCP_OPT_FAIL)
+				ppp_terminate(ipcp->ppp, TERM_USER_ERROR, 0);
+			break;
+		case CONFACK:
+			if (ipcp_recv_conf_ack(ipcp,(uint8_t*)(hdr + 1), ntohs(hdr->len) - PPP_HDRLEN))
+				ppp_terminate(ipcp->ppp, TERM_USER_ERROR, 0);
+			else
+				ppp_fsm_recv_conf_ack(&ipcp->fsm);
+			break;
+		case CONFNAK:
+			ipcp_recv_conf_nak(ipcp,(uint8_t*)(hdr + 1), ntohs(hdr->len) - PPP_HDRLEN);
+			ppp_fsm_recv_conf_rej(&ipcp->fsm);
+			break;
+		case CONFREJ:
+			if (ipcp_recv_conf_rej(ipcp, (uint8_t*)(hdr + 1), ntohs(hdr->len) - PPP_HDRLEN))
+				ppp_terminate(ipcp->ppp, TERM_USER_ERROR, 0);
+			else
+				ppp_fsm_recv_conf_rej(&ipcp->fsm);
+			break;
+		case TERMREQ:
+			if (conf_ppp_verbose)
+				log_ppp_info2("recv [IPCP TermReq id=%x]\n", hdr->id);
+			ppp_fsm_recv_term_req(&ipcp->fsm);
+			ppp_terminate(ipcp->ppp, TERM_USER_REQUEST, 0);
+			break;
+		case TERMACK:
+			if (conf_ppp_verbose)
+				log_ppp_info2("recv [IPCP TermAck id=%x]\n", hdr->id);
+			//ppp_fsm_recv_term_ack(&ipcp->fsm);
+			//ppp_terminate(ipcp->ppp, 0);
+			break;
+		case CODEREJ:
+			if (conf_ppp_verbose)
+				log_ppp_info2("recv [IPCP CodeRej id=%x]\n", hdr->id);
+			ppp_fsm_recv_code_rej_bad(&ipcp->fsm);
+			break;
+		default:
+			ppp_fsm_recv_unk(&ipcp->fsm);
+			break;
+	}
+}
+
+int ipcp_option_register(struct ipcp_option_handler_t *h)
+{
+	/*struct ipcp_option_drv_t *p;
+
+	list_for_each_entry(p,option_drv_list,entry)
+		if (p->id==h->id) 
+			return -1;*/
+	
+	list_add_tail(&h->entry, &option_handlers);
+
+	return 0;
+}
+
+static struct ppp_layer_t ipcp_layer =
+{
+	.init   = ipcp_layer_init,
+	.start  = ipcp_layer_start,
+	.finish = ipcp_layer_finish,
+	.free   = ipcp_layer_free,
+};
+
+static void __init ipcp_init(void)
+{
+	ppp_register_layer("ipcp", &ipcp_layer);
+}
+
diff --git a/accel-pppd/ppp/ppp_ipcp.h b/accel-pppd/ppp/ppp_ipcp.h
new file mode 100644
index 0000000..c955987
--- /dev/null
+++ b/accel-pppd/ppp/ppp_ipcp.h
@@ -0,0 +1,96 @@
+#ifndef PPP_IPCP_H
+#define PPP_IPCP_H
+
+#include <stdint.h>
+
+#include "triton.h"
+#include "ppp_fsm.h"
+/*
+ * Options.
+ */
+#define CI_COMP	2	  /* IP-Compress-Protocol */
+#define CI_ADDR 3   /* IP-Address */
+#define CI_DNS1 129 /* Primary-DNS-Address */
+#define CI_DNS2 131 /* Secondary-DNS-Address */
+
+struct ipcp_hdr_t
+{
+	uint16_t proto;
+	uint8_t code;
+	uint8_t id;
+	uint16_t len;
+} __attribute__((packed));
+struct ipcp_opt_hdr_t
+{
+	uint8_t id;
+	uint8_t len;
+} __attribute__((packed));
+struct ipcp_opt8_t
+{
+	struct ipcp_opt_hdr_t hdr;
+	uint8_t val;
+} __attribute__((packed));
+struct ipcp_opt16_t
+{
+	struct ipcp_opt_hdr_t hdr;
+	uint16_t val;
+} __attribute__((packed));
+struct ipcp_opt32_t
+{
+	struct ipcp_opt_hdr_t hdr;
+	uint32_t val;
+} __attribute__((packed));
+
+#define IPCP_OPT_NONE  0
+#define IPCP_OPT_ACK   1
+#define IPCP_OPT_NAK  -1
+#define IPCP_OPT_REJ  -2
+#define IPCP_OPT_FAIL -3
+
+struct ppp_ipcp_t;
+struct ipcp_option_handler_t;
+
+struct ipcp_option_t
+{
+	struct list_head entry;
+	int id;
+	int len;
+	int state;
+	int print:1;
+	struct ipcp_option_handler_t *h;
+};
+
+struct ipcp_option_handler_t
+{
+	struct list_head entry;
+	struct ipcp_option_t* (*init)(struct ppp_ipcp_t*);
+	int (*send_conf_req)(struct ppp_ipcp_t*,struct ipcp_option_t*,uint8_t*);
+	int (*send_conf_rej)(struct ppp_ipcp_t*,struct ipcp_option_t*,uint8_t*);
+	int (*send_conf_nak)(struct ppp_ipcp_t*,struct ipcp_option_t*,uint8_t*);
+	int (*recv_conf_req)(struct ppp_ipcp_t*,struct ipcp_option_t*,uint8_t*);
+	int (*recv_conf_rej)(struct ppp_ipcp_t*,struct ipcp_option_t*,uint8_t*);
+	int (*recv_conf_nak)(struct ppp_ipcp_t*,struct ipcp_option_t*,uint8_t*);
+	int (*recv_conf_ack)(struct ppp_ipcp_t*,struct ipcp_option_t*,uint8_t*);
+	void (*free)(struct ppp_ipcp_t*,struct ipcp_option_t*);
+	void (*print)(void (*print)(const char *fmt,...), struct ipcp_option_t*,uint8_t*);
+};
+
+struct ppp_ipcp_t
+{
+	struct ppp_layer_data_t ld;
+	struct ppp_handler_t hnd;
+	struct ppp_fsm_t fsm;
+	struct ppp_t *ppp;
+	struct list_head options;
+
+	struct list_head ropt_list; // last received ConfReq
+	int ropt_len;
+	
+	int conf_req_len;
+	int started:1;
+};
+
+int ipcp_option_register(struct ipcp_option_handler_t *h);
+
+#endif
+
diff --git a/accel-pppd/ppp/ppp_lcp.c b/accel-pppd/ppp/ppp_lcp.c
new file mode 100644
index 0000000..e40e321
--- /dev/null
+++ b/accel-pppd/ppp/ppp_lcp.c
@@ -0,0 +1,847 @@
+#include <stdlib.h>
+#include <string.h>
+#include <sys/socket.h>
+#include <arpa/inet.h>
+#include "linux_ppp.h"
+
+#include "triton.h"
+
+#include "log.h"
+
+#include "ppp.h"
+#include "ppp_lcp.h"
+#include "events.h"
+
+#include "memdebug.h"
+
+struct recv_opt_t
+{
+	struct list_head entry;
+	struct lcp_opt_hdr_t *hdr;
+	int len;
+	int state;
+	struct lcp_option_t *lopt;
+};
+
+static int conf_echo_interval = 0;
+static int conf_echo_failure = 3;
+
+static LIST_HEAD(option_handlers);
+static struct ppp_layer_t lcp_layer;
+
+static void lcp_layer_up(struct ppp_fsm_t*);
+static void lcp_layer_down(struct ppp_fsm_t*);
+static void lcp_layer_finished(struct ppp_fsm_t*);
+static int send_conf_req(struct ppp_fsm_t*);
+static void send_conf_ack(struct ppp_fsm_t*);
+static void send_conf_nak(struct ppp_fsm_t*);
+static void send_conf_rej(struct ppp_fsm_t*);
+static void send_code_rej(struct ppp_fsm_t*);
+static void start_echo(struct ppp_lcp_t *lcp);
+static void stop_echo(struct ppp_lcp_t *lcp);
+static void send_term_req(struct ppp_fsm_t *fsm);
+static void send_term_ack(struct ppp_fsm_t *fsm);
+static void lcp_recv(struct ppp_handler_t*);
+
+static void lcp_options_init(struct ppp_lcp_t *lcp)
+{
+	struct lcp_option_t *lopt;
+	struct lcp_option_handler_t *h;
+
+	INIT_LIST_HEAD(&lcp->options);
+
+	lcp->conf_req_len = sizeof(struct lcp_hdr_t);
+
+	list_for_each_entry(h, &option_handlers, entry) {
+		lopt = h->init(lcp);
+		if (lopt) {
+			lopt->h = h;
+			list_add_tail(&lopt->entry, &lcp->options);
+			lcp->conf_req_len += lopt->len;
+		}
+	}
+}
+
+static void lcp_options_free(struct ppp_lcp_t *lcp)
+{
+	struct lcp_option_t *lopt;
+
+	while (!list_empty(&lcp->options)) {
+		lopt = list_entry(lcp->options.next, typeof(*lopt), entry);
+		list_del(&lopt->entry);
+		lopt->h->free(lcp, lopt);
+	}
+}
+
+static struct ppp_layer_data_t *lcp_layer_init(struct ppp_t *ppp)
+{
+	struct ppp_lcp_t *lcp = _malloc(sizeof(*lcp));
+	memset(lcp, 0, sizeof(*lcp));
+	
+	log_ppp_debug("lcp_layer_init\n");
+
+	lcp->ppp = ppp;
+	lcp->fsm.ppp = ppp;
+	
+	lcp->hnd.proto = PPP_LCP;
+	lcp->hnd.recv = lcp_recv;
+	
+	ppp_register_chan_handler(ppp, &lcp->hnd);
+
+	lcp->fsm.proto = PPP_LCP;
+	ppp_fsm_init(&lcp->fsm);
+
+	lcp->fsm.layer_up = lcp_layer_up;
+	lcp->fsm.layer_down = lcp_layer_down;
+	lcp->fsm.layer_finished = lcp_layer_finished;
+	lcp->fsm.send_conf_req = send_conf_req;
+	lcp->fsm.send_conf_ack = send_conf_ack;
+	lcp->fsm.send_conf_nak = send_conf_nak;
+	lcp->fsm.send_conf_rej = send_conf_rej;
+	lcp->fsm.send_code_rej = send_code_rej;
+	lcp->fsm.send_term_req = send_term_req;
+	lcp->fsm.send_term_ack = send_term_ack;
+
+	INIT_LIST_HEAD(&lcp->ropt_list);
+
+	return &lcp->ld;
+}
+
+int lcp_layer_start(struct ppp_layer_data_t *ld)
+{
+	struct ppp_lcp_t *lcp = container_of(ld, typeof(*lcp), ld);
+	
+	log_ppp_debug("lcp_layer_start\n");
+
+	lcp_options_init(lcp);
+	ppp_fsm_lower_up(&lcp->fsm);
+	if (ppp_fsm_open(&lcp->fsm))
+		return -1;
+	
+	return 0;
+}
+
+static void _lcp_layer_finished(struct ppp_lcp_t *lcp)
+{
+	ppp_layer_finished(lcp->ppp, &lcp->ld);
+}
+
+void lcp_layer_finish(struct ppp_layer_data_t *ld)
+{
+	struct ppp_lcp_t *lcp = container_of(ld,typeof(*lcp),ld);
+	
+	log_ppp_debug("lcp_layer_finish\n");
+
+	if (lcp->started) {
+		stop_echo(lcp);
+		ppp_fsm_close(&lcp->fsm);
+	} else
+		triton_context_call(lcp->ppp->ctrl->ctx, (triton_event_func)_lcp_layer_finished, lcp);
+}
+
+void lcp_layer_free(struct ppp_layer_data_t *ld)
+{
+	struct ppp_lcp_t *lcp = container_of(ld, typeof(*lcp), ld);
+	
+	log_ppp_debug("lcp_layer_free\n");
+
+	stop_echo(lcp);
+	ppp_unregister_handler(lcp->ppp, &lcp->hnd);
+	lcp_options_free(lcp);
+	ppp_fsm_free(&lcp->fsm);
+	triton_cancel_call(lcp->ppp->ctrl->ctx, (triton_event_func)_lcp_layer_finished);
+	
+	_free(lcp);
+}
+
+static void lcp_layer_up(struct ppp_fsm_t *fsm)
+{
+	struct ppp_lcp_t *lcp = container_of(fsm, typeof(*lcp), fsm);
+
+	log_ppp_debug("lcp_layer_started\n");
+
+	if (!lcp->started) {
+		lcp->started = 1;
+		ppp_layer_started(lcp->ppp, &lcp->ld);
+	}
+	start_echo(lcp);
+}
+
+static void lcp_layer_down(struct ppp_fsm_t *fsm)
+{
+	struct ppp_lcp_t *lcp = container_of(fsm, typeof(*lcp), fsm);
+	//ppp_fsm_close(&lcp->fsm);
+	stop_echo(lcp);
+	//ppp_layer_finished(lcp->ppp,&lcp->ld);
+}
+
+static void lcp_layer_finished(struct ppp_fsm_t *fsm)
+{
+	struct ppp_lcp_t *lcp = container_of(fsm, typeof(*lcp), fsm);
+
+	log_ppp_debug("lcp_layer_finished\n");
+
+	stop_echo(lcp);
+	if (lcp->started) {
+		lcp->started = 0;
+		if (lcp->ppp->terminating)
+			ppp_layer_finished(lcp->ppp, &lcp->ld);
+		else
+			ppp_terminate(lcp->ppp, TERM_NAS_ERROR, 0);
+	} else
+		ppp_terminate(lcp->ppp, TERM_NAS_ERROR, 0);
+}
+
+static void print_ropt(struct recv_opt_t *ropt)
+{
+	int i;
+	uint8_t *ptr = (uint8_t*)ropt->hdr;
+
+	log_ppp_info2("<");
+	for (i = 0; i < ropt->len; i++) {
+		log_ppp_info2(" %x", ptr[i]);
+	}
+	log_ppp_info2(" >");
+}
+
+static int send_conf_req(struct ppp_fsm_t *fsm)
+{
+	struct ppp_lcp_t *lcp = container_of(fsm, typeof(*lcp), fsm);
+	uint8_t *buf = _malloc(lcp->conf_req_len), *ptr = buf;
+	struct lcp_hdr_t *lcp_hdr = (struct lcp_hdr_t*)ptr;
+	struct lcp_option_t *lopt;
+	int n;
+
+	lcp_hdr->proto = htons(PPP_LCP);
+	lcp_hdr->code = CONFREQ;
+	lcp_hdr->id = ++lcp->fsm.id;
+	lcp_hdr->len = 0;
+	
+	ptr += sizeof(*lcp_hdr);
+
+	list_for_each_entry(lopt, &lcp->options, entry) {
+		n = lopt->h->send_conf_req(lcp, lopt, ptr);
+		if (n < 0)
+			return -1;
+		if (n) {
+			ptr += n;
+			lopt->print = 1;
+		} else
+			lopt->print = 0;
+	}
+	
+	if (conf_ppp_verbose) {
+		log_ppp_info2("send [LCP ConfReq id=%x", lcp_hdr->id);
+		list_for_each_entry(lopt,&lcp->options,entry) {
+			if (lopt->print) {
+				log_ppp_info2(" ");
+				lopt->h->print(log_ppp_info2, lopt, NULL);
+			}
+		}
+		log_ppp_info2("]\n");
+	}
+
+	lcp_hdr->len = htons(ptr - buf - 2);
+	ppp_chan_send(lcp->ppp, lcp_hdr, ptr-buf);
+
+	_free(buf);
+
+	return 0;
+}
+
+static void send_conf_ack(struct ppp_fsm_t *fsm)
+{
+	struct ppp_lcp_t *lcp = container_of(fsm, typeof(*lcp), fsm);
+	struct lcp_hdr_t *hdr = (struct lcp_hdr_t*)lcp->ppp->chan_buf;
+
+	hdr->code = CONFACK;
+
+	if (conf_ppp_verbose)
+		log_ppp_info2("send [LCP ConfAck id=%x ]\n", lcp->fsm.recv_id);
+
+	ppp_chan_send(lcp->ppp, hdr, ntohs(hdr->len) + 2);
+}
+
+static void send_code_rej(struct ppp_fsm_t *fsm)
+{
+	struct ppp_lcp_t *lcp = container_of(fsm, typeof(*lcp), fsm);
+	struct lcp_hdr_t *hdr = (struct lcp_hdr_t*)lcp->ppp->chan_buf;
+
+	hdr->code = CONFACK;
+
+	if (conf_ppp_verbose)
+		log_ppp_info2("send [LCP CodeRej %x id=%x ]\n",hdr->code, lcp->fsm.recv_id);
+
+	ppp_chan_send(lcp->ppp, hdr, ntohs(hdr->len) + 2);
+}
+
+static void send_conf_nak(struct ppp_fsm_t *fsm)
+{
+	struct ppp_lcp_t *lcp = container_of(fsm, typeof(*lcp), fsm);
+	uint8_t *buf = _malloc(lcp->conf_req_len), *ptr = buf;
+	struct lcp_hdr_t *lcp_hdr = (struct lcp_hdr_t*)ptr;
+	struct lcp_option_t *lopt;
+
+	if (conf_ppp_verbose)
+		log_ppp_info2("send [LCP ConfNak id=%x", lcp->fsm.recv_id);
+
+	lcp_hdr->proto = htons(PPP_LCP);
+	lcp_hdr->code = CONFNAK;
+	lcp_hdr->id = lcp->fsm.recv_id;
+	lcp_hdr->len = 0;
+	
+	ptr += sizeof(*lcp_hdr);
+
+	list_for_each_entry(lopt, &lcp->options, entry) {
+		if (lopt->state == LCP_OPT_NAK) {
+			ptr+=lopt->h->send_conf_nak(lcp,lopt,ptr);
+			
+			if (conf_ppp_verbose) {
+				log_ppp_info2(" ");
+				lopt->h->print(log_ppp_info2, lopt, NULL);
+			}
+		}
+	}
+	
+	if (conf_ppp_verbose)
+		log_ppp_info2("]\n");
+
+	lcp_hdr->len = htons(ptr - buf - 2);
+	ppp_chan_send(lcp->ppp, lcp_hdr,ptr - buf);
+
+	_free(buf);
+}
+
+static void send_conf_rej(struct ppp_fsm_t *fsm)
+{
+	struct ppp_lcp_t *lcp = container_of(fsm, typeof(*lcp), fsm);
+	uint8_t *buf = _malloc(lcp->ropt_len + sizeof(struct lcp_hdr_t)), *ptr = buf;
+	struct lcp_hdr_t *lcp_hdr = (struct lcp_hdr_t*)ptr;
+	struct recv_opt_t *ropt;
+
+	if (conf_ppp_verbose)
+		log_ppp_info2("send [LCP ConfRej id=%x ", lcp->fsm.recv_id);
+
+	lcp_hdr->proto = htons(PPP_LCP);
+	lcp_hdr->code = CONFREJ;
+	lcp_hdr->id = lcp->fsm.recv_id;
+	lcp_hdr->len = 0;
+
+	ptr += sizeof(*lcp_hdr);
+
+	list_for_each_entry(ropt, &lcp->ropt_list, entry) {
+		if (ropt->state == LCP_OPT_REJ) {
+			memcpy(ptr, ropt->hdr, ropt->len);
+			ptr += ropt->len;
+
+			if (conf_ppp_verbose) {
+				log_ppp_info2(" ");
+				if (ropt->lopt)
+					ropt->lopt->h->print(log_ppp_info2, ropt->lopt, (uint8_t*)ropt->hdr);
+				else
+					print_ropt(ropt);
+			}
+		}
+	}
+
+	if (conf_ppp_verbose)
+		log_ppp_info2("]\n");
+
+	lcp_hdr->len = htons(ptr - buf - 2);
+	ppp_chan_send(lcp->ppp, lcp_hdr, ptr - buf);
+
+	_free(buf);
+}
+
+static int lcp_recv_conf_req(struct ppp_lcp_t *lcp, uint8_t *data, int size)
+{
+	struct lcp_opt_hdr_t *hdr;
+	struct recv_opt_t *ropt;
+	struct lcp_option_t *lopt;
+	int r, ret = 1;
+
+	lcp->ropt_len = size;
+
+	while (size > 0) {
+		hdr = (struct lcp_opt_hdr_t *)data;
+
+		ropt = _malloc(sizeof(*ropt));
+		memset(ropt, 0, sizeof(*ropt));
+
+		if (hdr->len > size)
+			ropt->len = size;
+		else
+			ropt->len = hdr->len;
+
+		ropt->hdr = hdr;
+		ropt->state = LCP_OPT_NONE;
+		list_add_tail(&ropt->entry, &lcp->ropt_list);
+
+		data += ropt->len;
+		size -= ropt->len;
+	}
+	
+	list_for_each_entry(lopt, &lcp->options, entry)
+		lopt->state = LCP_OPT_NONE;
+
+	if (conf_ppp_verbose)
+		log_ppp_info2("recv [LCP ConfReq id=%x", lcp->fsm.recv_id);
+
+	list_for_each_entry(ropt, &lcp->ropt_list, entry) {
+		list_for_each_entry(lopt, &lcp->options, entry) {
+			if (lopt->id == ropt->hdr->id) {
+				if (conf_ppp_verbose) {
+					log_ppp_info2(" ");
+					lopt->h->print(log_ppp_info2, lopt, (uint8_t*)ropt->hdr);
+				}
+				r = lopt->h->recv_conf_req(lcp, lopt, (uint8_t*)ropt->hdr);
+				lopt->state = r;
+				ropt->state = r;
+				ropt->lopt = lopt;
+				if (r<ret)
+					ret = r;
+				break;
+			}
+		}
+		if (!ropt->lopt) {
+			if (conf_ppp_verbose) {
+				log_ppp_info2(" ");
+				print_ropt(ropt);
+			}
+			ropt->state=LCP_OPT_REJ;
+			ret=LCP_OPT_REJ;
+		}
+	}
+
+	if (conf_ppp_verbose)
+		log_ppp_info2("]\n");
+
+	/*list_for_each_entry(lopt,&lcp->options,entry)
+	{
+		if (lopt->state==LCP_OPT_NONE)
+		{
+			r=lopt->h->recv_conf_req(lcp,lopt,NULL);
+			lopt->state=r;
+			if (r<ret) ret=r;
+		}
+	}*/
+
+	return ret;
+}
+
+static void lcp_free_conf_req(struct ppp_lcp_t *lcp)
+{
+	struct recv_opt_t *ropt;
+
+	while (!list_empty(&lcp->ropt_list)) {
+		ropt = list_entry(lcp->ropt_list.next, typeof(*ropt), entry);
+		list_del(&ropt->entry);
+		_free(ropt);
+	}
+}
+
+static int lcp_recv_conf_rej(struct ppp_lcp_t *lcp, uint8_t *data, int size)
+{
+	struct lcp_opt_hdr_t *hdr;
+	struct lcp_option_t *lopt;
+	int res = 0;
+
+	if (conf_ppp_verbose)
+		log_ppp_info2("recv [LCP ConfRej id=%x", lcp->fsm.recv_id);
+
+	if (lcp->fsm.recv_id != lcp->fsm.id) {
+		if (conf_ppp_verbose)
+			log_ppp_info2(": id mismatch ]\n");
+		return 0;
+	}
+
+	while (size > 0) {
+		hdr = (struct lcp_opt_hdr_t *)data;
+		
+		list_for_each_entry(lopt, &lcp->options, entry) {
+			if (lopt->id == hdr->id) {
+				if (conf_ppp_verbose) {
+					log_ppp_info2(" ");
+					lopt->h->print(log_ppp_info2, lopt, (uint8_t*)hdr);
+				}
+				if (!lopt->h->recv_conf_rej)
+					res = -1;
+				else if (lopt->h->recv_conf_rej(lcp, lopt, data))
+					res = -1;
+				break;
+			}
+		}
+
+		data += hdr->len;
+		size -= hdr->len;
+	}
+
+	if (conf_ppp_verbose)
+		log_ppp_info2("]\n");
+
+	return res;
+}
+
+static int lcp_recv_conf_nak(struct ppp_lcp_t *lcp, uint8_t *data, int size)
+{
+	struct lcp_opt_hdr_t *hdr;
+	struct lcp_option_t *lopt;
+	int res = 0;
+
+	if (conf_ppp_verbose)
+		log_ppp_info2("recv [LCP ConfNak id=%x", lcp->fsm.recv_id);
+
+	if (lcp->fsm.recv_id != lcp->fsm.id) {
+		if (conf_ppp_verbose)
+			log_ppp_info2(": id mismatch ]\n");
+		return 0;
+	}
+
+	while (size > 0) {
+		hdr = (struct lcp_opt_hdr_t *)data;
+		
+		list_for_each_entry(lopt,&lcp->options,entry) {
+			if (lopt->id == hdr->id) {
+				if (conf_ppp_verbose) {
+					log_ppp_info2(" ");
+					lopt->h->print(log_ppp_info2, lopt, data);
+				}
+				if (lopt->h->recv_conf_nak && lopt->h->recv_conf_nak(lcp, lopt, data))
+					res = -1;
+				break;
+			}
+		}
+
+		data += hdr->len;
+		size -= hdr->len;
+	}
+
+	if (conf_ppp_verbose)
+		log_ppp_info2("]\n");
+
+	return res;
+}
+
+static int lcp_recv_conf_ack(struct ppp_lcp_t *lcp, uint8_t *data, int size)
+{
+	struct lcp_opt_hdr_t *hdr;
+	struct lcp_option_t *lopt;
+	int res=0;
+
+	if (conf_ppp_verbose)
+		log_ppp_info2("recv [LCP ConfAck id=%x", lcp->fsm.recv_id);
+
+	if (lcp->fsm.recv_id != lcp->fsm.id) {
+		if (conf_ppp_verbose)
+			log_ppp_info2(": id mismatch ]\n");
+		return 0;
+	}
+
+	while (size > 0) {
+		hdr = (struct lcp_opt_hdr_t *)data;
+		
+		list_for_each_entry(lopt, &lcp->options, entry) {
+			if (lopt->id == hdr->id) {
+				if (conf_ppp_verbose) {
+					log_ppp_info2(" ");
+					lopt->h->print(log_ppp_info2, lopt, data);
+				}
+				if (!lopt->h->recv_conf_ack)
+					break;
+				if (lopt->h->recv_conf_ack(lcp, lopt, data))
+					res = -1;
+				break;
+			}
+		}
+
+		data += hdr->len;
+		size -= hdr->len;
+	}
+
+	if (conf_ppp_verbose)
+		log_ppp_info2("]\n");
+
+	return res;
+}
+
+static void lcp_recv_echo_repl(struct ppp_lcp_t *lcp, uint8_t *data, int size)
+{
+	uint32_t magic = *(uint32_t *)data;
+
+	if (size != 4) {
+		log_ppp_error("lcp:echo: magic number size mismatch\n");
+		ppp_terminate(lcp->ppp, TERM_USER_ERROR, 0);
+	}
+
+	if (conf_ppp_verbose)
+		log_ppp_debug("recv [LCP EchoRep id=%x <magic %x>]\n", lcp->fsm.recv_id, magic);
+
+	if (magic == lcp->magic) {
+		log_ppp_error("lcp: echo: loop-back detected\n");
+		ppp_terminate(lcp->ppp, TERM_NAS_ERROR, 0);
+	}
+
+	lcp->echo_sent = 0;
+}
+
+static void send_echo_reply(struct ppp_lcp_t *lcp)
+{
+	struct lcp_hdr_t *hdr = (struct lcp_hdr_t*)lcp->ppp->chan_buf;
+	uint32_t magic = *(uint32_t *)(hdr + 1);
+
+	hdr->code = ECHOREP;
+	*(uint32_t *)(hdr + 1) = lcp->magic;
+
+	if (conf_ppp_verbose)
+		log_ppp_debug("send [LCP EchoRep id=%x <magic %x>]\n", hdr->id, magic);
+
+	ppp_chan_send(lcp->ppp, hdr, ntohs(hdr->len) + 2);
+}
+
+static void send_echo_request(struct triton_timer_t *t)
+{
+	struct ppp_lcp_t *lcp = container_of(t, typeof(*lcp), echo_timer);
+	struct lcp_echo_req_t
+	{
+		struct lcp_hdr_t hdr;
+		uint32_t magic;
+	} __attribute__((packed)) msg = {
+		.hdr.proto = htons(PPP_LCP),
+		.hdr.code = ECHOREQ,
+		.hdr.id = ++lcp->fsm.id,
+		.hdr.len = htons(8),
+		.magic = lcp->magic,
+	};
+
+	if (++lcp->echo_sent > lcp->echo_failure) {
+		log_ppp_warn("lcp: no echo reply\n");
+		ppp_terminate(lcp->ppp, TERM_USER_ERROR, 1);
+	} else {
+		if (conf_ppp_verbose)
+			log_ppp_debug("send [LCP EchoReq id=%x <magic %x>]\n", msg.hdr.id, msg.magic);
+		ppp_chan_send(lcp->ppp,&msg,ntohs(msg.hdr.len)+2);
+	}
+}
+
+static void start_echo(struct ppp_lcp_t *lcp)
+{
+	lcp->echo_interval = conf_echo_interval;
+	lcp->echo_failure = conf_echo_failure;
+
+	lcp->echo_timer.period = lcp->echo_interval * 1000;
+	lcp->echo_timer.expire = send_echo_request;
+	if (lcp->echo_timer.period && !lcp->echo_timer.tpd)
+		triton_timer_add(lcp->ppp->ctrl->ctx, &lcp->echo_timer, 0);
+}
+static void stop_echo(struct ppp_lcp_t *lcp)
+{
+	if (lcp->echo_timer.tpd)
+		triton_timer_del(&lcp->echo_timer);
+}
+
+static void send_term_req(struct ppp_fsm_t *fsm)
+{
+	struct ppp_lcp_t *lcp=container_of(fsm,typeof(*lcp),fsm);
+	struct lcp_hdr_t hdr = {
+		.proto = htons(PPP_LCP),
+		.code = TERMREQ,
+		.id = ++lcp->fsm.id,
+		.len = htons(4),
+	};
+
+	if (conf_ppp_verbose)
+		log_ppp_info2("send [LCP TermReq id=%i]\n", hdr.id);
+
+	ppp_chan_send(lcp->ppp, &hdr, 6);
+}
+
+static void send_term_ack(struct ppp_fsm_t *fsm)
+{
+	struct ppp_lcp_t *lcp = container_of(fsm, typeof(*lcp), fsm);
+	struct lcp_hdr_t hdr = {
+		.proto = htons(PPP_LCP),
+		.code = TERMACK,
+		.id = lcp->fsm.recv_id,
+		.len = htons(4),
+	};
+
+	if (conf_ppp_verbose)
+		log_ppp_info2("send [LCP TermAck id=%i]\n", hdr.id);
+	
+	ppp_chan_send(lcp->ppp, &hdr, 6);
+}
+
+void lcp_send_proto_rej(struct ppp_t *ppp, uint16_t proto)
+{
+	struct ppp_lcp_t *lcp = container_of(ppp_find_layer_data(ppp, &lcp_layer), typeof(*lcp), ld);
+	struct rej_msg_t
+	{
+		struct lcp_hdr_t hdr;
+		uint16_t proto;
+	} __attribute__((packed)) msg = {
+		.hdr.proto = htons(PPP_LCP),
+		.hdr.code = PROTOREJ,
+		.hdr.id = ++lcp->fsm.id,
+		.hdr.len = htons(6),
+		.proto = ntohs(proto),
+	};
+
+	if (conf_ppp_verbose)
+		log_ppp_info2("send [LCP ProtoRej id=%i <%04x>]\n", msg.hdr.id, proto);
+
+	ppp_chan_send(lcp->ppp, &msg, sizeof(msg));
+}
+
+static void lcp_recv(struct ppp_handler_t*h)
+{
+	struct lcp_hdr_t *hdr;
+	struct ppp_lcp_t *lcp = container_of(h, typeof(*lcp), hnd);
+	int r;
+	char *term_msg;
+	
+	if (lcp->fsm.fsm_state == FSM_Initial || lcp->fsm.fsm_state == FSM_Closed || lcp->ppp->terminating) {
+		/*if (conf_ppp_verbose)
+			log_ppp_warn("LCP: discaring packet\n");
+		lcp_send_proto_rej(ccp->ppp, htons(PPP_CCP));*/
+		return;
+	}
+
+	if (lcp->ppp->chan_buf_size < PPP_HEADERLEN + 2) {
+		log_ppp_warn("LCP: short packet received\n");
+		return;
+	}
+
+	hdr = (struct lcp_hdr_t *)lcp->ppp->chan_buf;
+	if (ntohs(hdr->len) < PPP_HEADERLEN) {
+		log_ppp_warn("LCP: short packet received\n");
+		return;
+	}
+
+	lcp->fsm.recv_id = hdr->id;
+	switch(hdr->code) {
+		case CONFREQ:
+			r = lcp_recv_conf_req(lcp, (uint8_t*)(hdr + 1), ntohs(hdr->len) - PPP_HDRLEN);
+			switch(r) {
+				case LCP_OPT_ACK:
+					ppp_fsm_recv_conf_req_ack(&lcp->fsm);
+					break;
+				case LCP_OPT_NAK:
+					ppp_fsm_recv_conf_req_nak(&lcp->fsm);
+					break;
+				case LCP_OPT_REJ:
+					ppp_fsm_recv_conf_req_rej(&lcp->fsm);
+					break;
+			}
+			lcp_free_conf_req(lcp);
+			if (r == LCP_OPT_FAIL)
+				ppp_terminate(lcp->ppp, TERM_USER_ERROR, 0);
+			break;
+		case CONFACK:
+			if (lcp_recv_conf_ack(lcp,(uint8_t*)(hdr + 1), ntohs(hdr->len) - PPP_HDRLEN))
+				ppp_terminate(lcp->ppp, TERM_USER_ERROR, 0);
+			else
+				if (lcp->fsm.recv_id != lcp->fsm.id)
+					break;
+				ppp_fsm_recv_conf_ack(&lcp->fsm);
+			break;
+		case CONFNAK:
+			lcp_recv_conf_nak(lcp, (uint8_t*)(hdr + 1), ntohs(hdr->len) - PPP_HDRLEN);
+			if (lcp->fsm.recv_id != lcp->fsm.id)
+				break;
+			ppp_fsm_recv_conf_rej(&lcp->fsm);
+			break;
+		case CONFREJ:
+			if (lcp_recv_conf_rej(lcp,(uint8_t*)(hdr + 1), ntohs(hdr->len) - PPP_HDRLEN))
+				ppp_terminate(lcp->ppp, TERM_USER_ERROR, 0);
+			else
+				if (lcp->fsm.recv_id != lcp->fsm.id)
+					break;
+				ppp_fsm_recv_conf_rej(&lcp->fsm);
+			break;
+		case TERMREQ:
+			if (conf_ppp_verbose)
+				log_ppp_info2("recv [LCP TermReq id=%x]\n", hdr->id);
+			ppp_fsm_recv_term_req(&lcp->fsm);
+			ppp_terminate(lcp->ppp, TERM_USER_REQUEST, 0);
+			break;
+		case TERMACK:
+			if (conf_ppp_verbose)
+				log_ppp_info2("recv [LCP TermAck id=%x]\n", hdr->id);
+			ppp_fsm_recv_term_ack(&lcp->fsm);
+			break;
+		case CODEREJ:
+			if (conf_ppp_verbose)
+				log_ppp_info2("recv [LCP CodeRej id=%x]\n", hdr->id);
+			ppp_fsm_recv_code_rej_bad(&lcp->fsm);
+			break;
+		case ECHOREQ:
+			if (conf_ppp_verbose)
+				log_ppp_debug("recv [LCP EchoReq id=%x <magic %x>]\n", hdr->id, *(uint32_t*)(hdr + 1));
+			send_echo_reply(lcp);
+			break;
+		case ECHOREP:
+			lcp_recv_echo_repl(lcp, (uint8_t*)(hdr + 1), ntohs(hdr->len) - PPP_HDRLEN);
+			break;
+		case PROTOREJ:
+			if (conf_ppp_verbose)
+				log_ppp_info2("recv [LCP ProtoRej id=%x <%04x>]\n", hdr->code, hdr->id, ntohs(*(uint16_t*)(hdr + 1)));
+			ppp_recv_proto_rej(lcp->ppp, ntohs(*(uint16_t *)(hdr + 1)));
+			break;
+		case IDENT:
+			if (conf_ppp_verbose) {
+				term_msg = _strndup((char*)(hdr + 1) + 4, ntohs(hdr->len) - 4 - 4);
+				log_ppp_info2("recv [LCP Ident id=%x <%s>]\n", hdr->id, term_msg);
+				_free(term_msg);
+			}
+			break;
+		default:
+			if (conf_ppp_verbose)
+				log_ppp_info2("recv [LCP Unknown %x]\n", hdr->code);
+			ppp_fsm_recv_unk(&lcp->fsm);
+			break;
+	}
+}
+
+int lcp_option_register(struct lcp_option_handler_t *h)
+{
+	/*struct lcp_option_drv_t *p;
+
+	list_for_each_entry(p,option_drv_list,entry)
+		if (p->id==h->id) 
+			return -1;*/
+	
+	list_add_tail(&h->entry, &option_handlers);
+
+	return 0;
+}
+
+static struct ppp_layer_t lcp_layer=
+{
+	.init   = lcp_layer_init,
+	.start  = lcp_layer_start,
+	.finish = lcp_layer_finish,
+	.free   = lcp_layer_free,
+};
+
+static void load_config(void)
+{
+	char *opt;
+
+	opt = conf_get_opt("lcp", "echo-interval");
+	if (opt && atoi(opt) > 0)
+		conf_echo_interval = atoi(opt);
+
+	opt = conf_get_opt("lcp", "echo-failure");
+	if (opt && atoi(opt) > 0)
+		conf_echo_failure = atoi(opt);
+}
+
+static void __init lcp_init(void)
+{
+	load_config();
+
+	ppp_register_layer("lcp", &lcp_layer);
+
+	triton_event_register_handler(EV_CONFIG_RELOAD, (triton_event_func)load_config);
+}
+
diff --git a/accel-pppd/ppp/ppp_lcp.h b/accel-pppd/ppp/ppp_lcp.h
new file mode 100644
index 0000000..6d67b69
--- /dev/null
+++ b/accel-pppd/ppp/ppp_lcp.h
@@ -0,0 +1,136 @@
+#ifndef PPP_LCP_H
+#define PPP_LCP_H
+
+#include <stdint.h>
+
+#include "triton.h"
+#include "ppp_fsm.h"
+/*
+ * Options.
+ */
+#define CI_VENDOR	0	/* Vendor Specific */
+#define CI_MRU		1	/* Maximum Receive Unit */
+#define CI_ASYNCMAP	2	/* Async Control Character Map */
+#define CI_AUTH    3	/* Authentication Type */
+#define CI_QUALITY	4	/* Quality Protocol */
+#define CI_MAGIC	5	/* Magic Number */
+#define CI_PCOMP	7	/* Protocol Field Compression */
+#define CI_ACCOMP 8	/* Address/Control Field Compression */
+#define CI_FCSALTERN	9	/* FCS-Alternatives */
+#define CI_SDP		10	/* Self-Describing-Pad */
+#define CI_NUMBERED	11	/* Numbered-Mode */
+#define CI_CALLBACK	13	/* callback */
+#define CI_MRRU		17	/* max reconstructed receive unit; multilink */
+#define CI_SSNHF	18	/* short sequence numbers for multilink */
+#define CI_EPDISC	19	/* endpoint discriminator */
+#define CI_MPPLUS	22	/* Multi-Link-Plus-Procedure */
+#define CI_LDISC	23	/* Link-Discriminator */
+#define CI_LCPAUTH	24	/* LCP Authentication */
+#define CI_COBS		25	/* Consistent Overhead Byte Stuffing */
+#define CI_PREFELIS	26	/* Prefix Elision */
+#define CI_MPHDRFMT	27	/* MP Header Format */
+#define CI_I18N		28	/* Internationalization */
+#define CI_SDL		29	/* Simple Data Link */
+
+struct lcp_hdr_t
+{
+	uint16_t proto;
+	uint8_t code;
+	uint8_t id;
+	uint16_t len;
+} __attribute__((packed));
+struct lcp_opt_hdr_t
+{
+	uint8_t id;
+	uint8_t len;
+} __attribute__((packed));
+struct lcp_opt8_t
+{
+	struct lcp_opt_hdr_t hdr;
+	uint8_t val;
+} __attribute__((packed));
+struct lcp_opt16_t
+{
+	struct lcp_opt_hdr_t hdr;
+	uint16_t val;
+} __attribute__((packed));
+struct lcp_opt32_t
+{
+	struct lcp_opt_hdr_t hdr;
+	uint32_t val;
+} __attribute__((packed));
+
+/*struct lcp_options_t
+{
+	int magic;
+	int mtu;
+	int mru;
+	int accomp; // 0 - disabled, 1 - enable, 2 - allow, disabled, 3 - allow,enabled
+	int pcomp;  // 0 - disabled, 1 - enable, 2 - allow, disabled, 3 - allow,enabled
+	// negotiated options;
+	int neg_mru;
+	int neg_mtu;
+	int neg_accomp; // -1 - rejected
+	int neg_pcomp;
+	int neg_auth[AUTH_MAX];
+};*/
+
+#define LCP_OPT_NONE  0
+#define LCP_OPT_ACK   1
+#define LCP_OPT_NAK  -1
+#define LCP_OPT_REJ  -2
+#define LCP_OPT_FAIL -3
+
+struct ppp_lcp_t;
+struct lcp_option_handler_t;
+
+struct lcp_option_t
+{
+	struct list_head entry;
+	int id;
+	int len;
+	int state;
+	int print:1;
+	struct lcp_option_handler_t *h;
+};
+
+struct lcp_option_handler_t
+{
+	struct list_head entry;
+	struct lcp_option_t* (*init)(struct ppp_lcp_t*);
+	int (*send_conf_req)(struct ppp_lcp_t*,struct lcp_option_t*,uint8_t*);
+	int (*send_conf_rej)(struct ppp_lcp_t*,struct lcp_option_t*,uint8_t*);
+	int (*send_conf_nak)(struct ppp_lcp_t*,struct lcp_option_t*,uint8_t*);
+	int (*recv_conf_req)(struct ppp_lcp_t*,struct lcp_option_t*,uint8_t*);
+	int (*recv_conf_rej)(struct ppp_lcp_t*,struct lcp_option_t*,uint8_t*);
+	int (*recv_conf_nak)(struct ppp_lcp_t*,struct lcp_option_t*,uint8_t*);
+	int (*recv_conf_ack)(struct ppp_lcp_t*,struct lcp_option_t*,uint8_t*);
+	void (*free)(struct ppp_lcp_t*,struct lcp_option_t*);
+	void (*print)(void (*print)(const char *fmt,...), struct lcp_option_t*,uint8_t*);
+};
+
+struct ppp_lcp_t
+{
+	struct ppp_layer_data_t ld;
+	struct ppp_handler_t hnd;
+	struct ppp_fsm_t fsm;
+	struct ppp_t *ppp;
+	struct list_head options;
+
+	struct triton_timer_t echo_timer;
+	int echo_interval;
+	int echo_failure;
+	int echo_sent;
+	int magic;
+
+	struct list_head ropt_list; // last received ConfReq
+	int ropt_len;
+	
+	int conf_req_len;
+	int started:1;
+};
+
+int lcp_option_register(struct lcp_option_handler_t *h);
+
+#endif
+
diff --git a/accel-pppd/ppp/ppp_notify.c b/accel-pppd/ppp/ppp_notify.c
new file mode 100644
index 0000000..ad9fd1f
--- /dev/null
+++ b/accel-pppd/ppp/ppp_notify.c
@@ -0,0 +1,54 @@
+#include "ppp.h"
+
+static LIST_HEAD(notified_list);
+
+void __export ppp_register_notified(struct ppp_notified_t *n)
+{
+	list_add_tail(&n->entry, &notified_list);
+}
+
+void __export ppp_unregister_notified(struct ppp_notified_t *n)
+{
+	list_del(&n->entry);
+}
+
+void ppp_notify_starting(struct ppp_t *ppp)
+{
+	struct ppp_notified_t *n;
+
+	list_for_each_entry(n, &notified_list, entry) {
+		if (n->starting)
+			n->starting(n, ppp);
+	}
+}
+
+void ppp_notify_started(struct ppp_t *ppp)
+{
+	struct ppp_notified_t *n;
+
+	list_for_each_entry(n, &notified_list, entry) {
+		if (n->started)
+			n->started(n, ppp);
+	}
+}
+
+void ppp_notify_finished(struct ppp_t *ppp)
+{
+	struct ppp_notified_t *n;
+
+	list_for_each_entry(n, &notified_list, entry) {
+		if (n->finished)
+			n->finished(n, ppp);
+	}
+}
+
+void ppp_notify_finishing(struct ppp_t *ppp)
+{
+	struct ppp_notified_t *n;
+
+	list_for_each_entry(n, &notified_list, entry) {
+		if (n->finishing)
+			n->finishing(n, ppp);
+	}
+}
+
diff --git a/accel-pppd/ppp/ppp_pd.c b/accel-pppd/ppp/ppp_pd.c
new file mode 100644
index 0000000..f770208
--- /dev/null
+++ b/accel-pppd/ppp/ppp_pd.c
@@ -0,0 +1,14 @@
+#include "ppp.h"
+
+#include "memdebug.h"
+
+int ppp_store_pd(struct ppp_t *ppp, pd_key_t key, void *data)
+{
+	struct ppp_pd_t *pd;
+
+	list_for_each_entry(pd, &ppp->pd_list, entry)
+		if (pd->key == key)
+			return -1;
+	
+
+}