rename accel-pptp to accel-ppp

1 files changed, 847 insertions, 0 deletions

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);
+}
+