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-rw-r--r--accel-pppd/ppp/ppp_lcp.c847
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);
+}
+
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-10 17:17:23 +0000