X-Git-Url: https://tinc-vpn.org/git/browse?p=tinc;a=blobdiff_plain;f=src%2Fprotocol.c;h=da35a96fa54a14b6c9a88a6deb271ac998446bbe;hp=0e250da508ab983446c9f1062df9cf1dcff77ec7;hb=89610e3fbada1dee79769b8146a500c8357fd81d;hpb=16d581be68bb52c08569e34e8a6b87f66b87e8ee diff --git a/src/protocol.c b/src/protocol.c index 0e250da5..da35a96f 100644 --- a/src/protocol.c +++ b/src/protocol.c @@ -23,6 +23,8 @@ #include #include #include +#include +#include #include #include @@ -33,261 +35,234 @@ #include "netutl.h" #include "protocol.h" +char buffer[MAXBUFSIZE+1]; +int buflen; + int send_ack(conn_list_t *cl) { - unsigned char tmp = ACK; - +cp if(debug_lvl > 2) syslog(LOG_DEBUG, "Send ACK to %s", cl->hostname); - syslog(LOG_NOTICE, "Connection with %s activated.", cl->hostname); - if((send(cl->meta_socket, &tmp, sizeof(tmp), 0)) < 0) + buflen = snprintf(buffer, MAXBUFLEN, "%d\n", ACK); + + if((write(cl->meta_socket, buffer, buflen)) < 0) { syslog(LOG_ERR, "send failed: %d:%d: %m", __FILE__, __LINE__); return -1; } + syslog(LOG_NOTICE, "Connection with %s activated.", cl->hostname); +cp return 0; } int send_termreq(conn_list_t *cl) { - termreq_t tmp; - - tmp.type = TERMREQ; - tmp.vpn_ip = myself->vpn_ip; - +cp if(debug_lvl > 2) - syslog(LOG_DEBUG, "Send TERMREQ(" IP_ADDR_S ") to " IP_ADDR_S, IP_ADDR_V(tmp.vpn_ip), + syslog(LOG_DEBUG, "Send TERMREQ to " IP_ADDR_S, IP_ADDR_V(cl->vpn_ip)); - if((send(cl->meta_socket, &tmp, sizeof(tmp), 0)) < 0) + buflen = snprintf(buffer, MAXBUFLEN, "%d %lx\n", TERMREQ, myself->vpn_ip); + + if((write(cl->meta_socket, buffer, buflen)) < 0) { syslog(LOG_ERR, "send failed: %s:%d: %m", __FILE__, __LINE__); return -1; } - +cp return 0; } int send_timeout(conn_list_t *cl) { - termreq_t tmp; - - tmp.type = PINGTIMEOUT; - tmp.vpn_ip = myself->vpn_ip; - +cp if(debug_lvl > 2) - syslog(LOG_DEBUG, "Send TIMEOUT(" IP_ADDR_S ") to " IP_ADDR_S, IP_ADDR_V(tmp.vpn_ip), + syslog(LOG_DEBUG, "Send TIMEOUT to " IP_ADDR_S, IP_ADDR_V(cl->vpn_ip)); - if((send(cl->meta_socket, &tmp, sizeof(tmp), 0)) < 0) + buflen = snprintf(buffer, MAXBUFLEN, "%d %lx\n", PINGTIMEOUT, myself->vpn_ip); + + if((write(cl->meta_socket, buffer, buflen)) < 0) { syslog(LOG_ERR, "send failed: %s:%d: %m", __FILE__, __LINE__); return -1; } - +cp return 0; } int send_del_host(conn_list_t *cl, conn_list_t *new_host) { - del_host_t tmp; - - tmp.type = DEL_HOST; - tmp.vpn_ip = new_host->vpn_ip; - +cp if(debug_lvl > 2) - syslog(LOG_DEBUG, "Sending delete host %lx to " IP_ADDR_S, - tmp.vpn_ip, IP_ADDR_V(cl->vpn_ip)); + syslog(LOG_DEBUG, "Sending delete host " IP_ADDR_S " to " IP_ADDR_S, + IP_ADDR_V(new_host->vpn_ip), IP_ADDR_V(cl->vpn_ip)); + + buflen = snprintf(buffer, MAXBUFLEN, "%d %lx\n", DEL_HOST, new_host->vpn_ip); - if((send(cl->meta_socket, (unsigned char*)&tmp, sizeof(del_host_t), 0)) < 0) + if((write(cl->meta_socket, buffer, buflen)) < 0) { syslog(LOG_ERR, "send failed: %s:%d: %m", __FILE__, __LINE__); return -1; } - +cp return 0; } int send_ping(conn_list_t *cl) { - unsigned char tmp = PING; - +cp if(debug_lvl > 3) syslog(LOG_DEBUG, "pinging " IP_ADDR_S, IP_ADDR_V(cl->vpn_ip)); - if((send(cl->meta_socket, &tmp, sizeof(tmp), 0)) < 0) + buflen = snprintf(buffer, MAXBUFLEN, "%d\n", PING); + + if((write(cl->meta_socket, buffer, buflen)) < 0) { syslog(LOG_ERR, "send failed: %s:%d: %m", __FILE__, __LINE__); return -1; } - +cp return 0; } int send_pong(conn_list_t *cl) { - unsigned char tmp = PONG; +cp + buflen = snprintf(buffer, MAXBUFLEN, "%d\n", PONG); - if((send(cl->meta_socket, &tmp, sizeof(tmp), 0)) < 0) + if((write(cl->meta_socket, buffer, buflen)) < 0) { syslog(LOG_ERR, "send failed: %s:%d: %m", __FILE__, __LINE__); return -1; } - +cp return 0; } int send_add_host(conn_list_t *cl, conn_list_t *new_host) { - add_host_t tmp; - - tmp.type = ADD_HOST; - tmp.real_ip = new_host->real_ip; - tmp.vpn_ip = new_host->vpn_ip; - tmp.vpn_mask = new_host->vpn_mask; - tmp.portnr = new_host->port; - +cp if(debug_lvl > 2) - syslog(LOG_DEBUG, "Sending add host (%lx/%lx %lx:%hd) to " IP_ADDR_S, - tmp.vpn_ip, tmp.vpn_mask, tmp.real_ip, tmp.portnr, + syslog(LOG_DEBUG, "Sending add host to " IP_ADDR_S, IP_ADDR_V(cl->vpn_ip)); - if((send(cl->meta_socket, (unsigned char*)&tmp, sizeof(add_host_t), 0)) < 0) + buflen = snprintf(buffer, MAXBUFLEN, "%d %lx %lx/%lx:%x\n", ADD_HOST, new_host->real_ip, new_host->vpn_ip, new_host->vpn_mask, new_host->port); + + if((write(cl->meta_socket, buffer, buflen)) < 0) { syslog(LOG_ERR, "send failed: %s:%d: %m", __FILE__, __LINE__); return -1; } - +cp return 0; } int send_key_changed(conn_list_t *cl, conn_list_t *src) { - key_changed_t tmp; - - tmp.type = KEY_CHANGED; - tmp.from = src->vpn_ip; - +cp if(debug_lvl > 2) - syslog(LOG_DEBUG, "Sending KEY_CHANGED (%lx) to " IP_ADDR_S, - tmp.from, IP_ADDR_V(cl->vpn_ip)); + syslog(LOG_DEBUG, "Sending KEY_CHANGED to " IP_ADDR_S, + IP_ADDR_V(cl->vpn_ip)); - if((send(cl->meta_socket, (unsigned char*)&tmp, sizeof(key_changed_t), 0)) < 0) + buflen = snprintf(buffer, MAXBUFLEN, "%d %lx\n", KEY_CHANGED, src->vpn_ip); + + if((write(cl->meta_socket, buffer, buflen)) < 0) { syslog(LOG_ERR, "send failed: %s:%d: %m", __FILE__, __LINE__); return -1; } - +cp return 0; } void send_key_changed2(void) { conn_list_t *p; - +cp for(p = conn_list; p != NULL; p = p->next) if(p->status.meta && p->protocol_version > PROT_3) send_key_changed(p, myself); +cp } int send_basic_info(conn_list_t *cl) { - basic_info_t tmp; - - tmp.type = BASIC_INFO; - tmp.protocol = PROT_CURRENT; - - tmp.portnr = myself->port; - tmp.vpn_ip = myself->vpn_ip; - tmp.vpn_mask = myself->vpn_mask; - +cp if(debug_lvl > 2) - syslog(LOG_DEBUG, "Send BASIC_INFO(%d,%hd," IP_ADDR_S "," IP_ADDR_S ") to " IP_ADDR_S, - tmp.protocol, tmp.portnr, IP_ADDR_V(tmp.vpn_ip), IP_ADDR_V(tmp.vpn_mask), + syslog(LOG_DEBUG, "Send BASIC_INFO to " IP_ADDR_S, IP_ADDR_V(cl->real_ip)); - if((send(cl->meta_socket, &tmp, sizeof(tmp), 0)) < 0) + buflen = snprintf(buffer, MAXBUFLEN, "%d %d %lx/%lx:%x\n", BASIC_INFO, PROT_CURRENT, myself->vpn_ip, myself->vpn_mask, myself->port); + + if((write(cl->meta_socket, buffer, buflen)) < 0) { syslog(LOG_ERR, "send failed: %s:%d: %m", __FILE__, __LINE__); return -1; } - +cp return 0; } int send_passphrase(conn_list_t *cl) { passphrase_t tmp; - - tmp.type = PASSPHRASE; +cp encrypt_passphrase(&tmp); if(debug_lvl > 2) - syslog(LOG_DEBUG, "Send PASSPHRASE(%hd,...) to " IP_ADDR_S, tmp.len, - IP_ADDR_V(cl->vpn_ip)); + syslog(LOG_DEBUG, "Send PASSPHRASE %s to " IP_ADDR_S, + tmp.phrase, IP_ADDR_V(cl->vpn_ip)); - if((send(cl->meta_socket, &tmp, tmp.len+3, 0)) < 0) + buflen = snprintf(buffer, MAXBUFSIZE, "%d %s\n", PASSPHRASE, tmp.phrase); + + if((write(cl->meta_socket, buffer, buflen)) < 0) { syslog(LOG_ERR, "send failed: %s:%d: %m", __FILE__, __LINE__); return -1; } - +cp return 0; } int send_public_key(conn_list_t *cl) { - public_key_t *tmp; - - tmp = (public_key_t*)xmalloc(strlen(my_public_key_base36)+sizeof(public_key_t)); - tmp->type = PUBLIC_KEY; - tmp->len = strlen(my_public_key_base36); - strcpy(&tmp->key, my_public_key_base36); - +cp if(debug_lvl > 2) - syslog(LOG_DEBUG, "Send PUBLIC_KEY(%hd,%s) to " IP_ADDR_S, tmp->len, &tmp->key, - IP_ADDR_V(cl->vpn_ip)); + syslog(LOG_DEBUG, "Send PUBLIC_KEY %s to " IP_ADDR_S, + my_public_key_base36, IP_ADDR_V(cl->vpn_ip)); + + buflen = snprintf(buffer, MAXBUFLEN, "%d %s\n", PUBLIC_KEY, my_public_key_base36); - if((send(cl->meta_socket, tmp, tmp->len+sizeof(public_key_t), 0)) < 0) + if((write(cl->meta_socket, buffer, buflen)) < 0) { syslog(LOG_ERR, "send failed: %s:%d: %m", __FILE__, __LINE__); return -1; } - +cp return 0; } int send_calculate(conn_list_t *cl, char *k) { - calculate_t *tmp; - - tmp = xmalloc(strlen(k)+sizeof(calculate_t)); - tmp->type = CALCULATE; - tmp->len = strlen(k); - strcpy(&tmp->key, k); +cp + buflen = snprintf(buffer, MAXBUFLEN, "%d %s\n", CALCULATE, k); - if(send(cl->meta_socket, tmp, tmp->len+4, 0) < 0) + if((write(cl->meta_socket, buffer, buflen)) < 0) { syslog(LOG_ERR, "send failed: %s:%d: %m", __FILE__, __LINE__); return -1; } - +cp return 0; } int send_key_request(ip_t to) { - key_req_t *tmp; conn_list_t *fw; - - tmp = xmalloc(sizeof(key_req_t)); - tmp->type = REQ_KEY; - tmp->to = to; - tmp->from = myself->vpn_ip; - tmp->len = 0; - +cp fw = lookup_conn(to); if(!fw) { @@ -299,47 +274,45 @@ int send_key_request(ip_t to) if(debug_lvl > 2) syslog(LOG_DEBUG, "Sending out request for public key to " IP_ADDR_S, IP_ADDR_V(fw->nexthop->vpn_ip)); - if(send(fw->nexthop->meta_socket, tmp, sizeof(key_req_t), 0) < 0) + + buflen = snprintf(buffer, MAXBUFLEN, "%d %lx %lx\n", REQ_KEY, to, myself->vpn_ip); + + if((write(fw->nexthop->meta_socket, buffer, buflen)) < 0) { syslog(LOG_ERR, "send failed: %s:%d: %m", __FILE__, __LINE__); return -1; } fw->status.waitingforkey = 1; - +cp return 0; } int send_key_answer(conn_list_t *cl, ip_t to) { - key_req_t *tmp; conn_list_t *fw; - - tmp = xmalloc(sizeof(key_req_t)+strlen(my_public_key_base36)); - tmp->type = ANS_KEY; - tmp->to = to; - tmp->from = myself->vpn_ip; - tmp->expiry = my_key_expiry; - tmp->len = strlen(my_public_key_base36); - strcpy(&tmp->key, my_public_key_base36); +cp fw = lookup_conn(to); if(!fw) - { - syslog(LOG_ERR, "Attempting to send key answer to " IP_ADDR_S ", which does not exist?", - IP_ADDR_V(to)); - return -1; - } - - if(debug_lvl > 2) + { + syslog(LOG_ERR, "Attempting to send key answer to " IP_ADDR_S ", which does not exist?", + IP_ADDR_V(to)); + return -1; + } + + if(debug_lvl > 2) syslog(LOG_DEBUG, "Sending public key to " IP_ADDR_S, IP_ADDR_V(fw->nexthop->vpn_ip)); - if(send(fw->nexthop->meta_socket, tmp, sizeof(key_req_t)+tmp->len, 0) < 0) + + buflen = snprintf(buffer, MAXBUFLEN, "%d %lx %lx %d %s\n", ANS_KEY, to, myself->vpn_ip, my_key_expiry, my_public_key_base36); + + if((write(fw->nexthop->meta_socket, buffer, buflen)) < 0) { syslog(LOG_ERR, "send failed: %s:%d: %m", __FILE__, __LINE__); return -1; } - +cp return 0; } @@ -352,11 +325,11 @@ int notify_others(conn_list_t *new, conn_list_t *source, int (*function)(conn_list_t*, conn_list_t*)) { conn_list_t *p; - +cp for(p = conn_list; p != NULL; p = p->next) - if(p != new && p != source && p->status.meta && p->protocol_version > PROT_3) + if(p != new && p != source && p->status.meta) function(p, new); - +cp return 0; } @@ -367,11 +340,11 @@ int notify_others(conn_list_t *new, conn_list_t *source, int notify_one(conn_list_t *new) { conn_list_t *p; - +cp for(p = conn_list; p != NULL; p = p->next) if(p != new && p->protocol_version > PROT_3) send_add_host(new, p); - +cp return 0; } @@ -379,18 +352,18 @@ int notify_one(conn_list_t *new) The incoming request handlers */ -int basic_info_h(conn_list_t *cl, unsigned char *d, int len) +int basic_info_h(conn_list_t *cl) { - basic_info_t *tmp = (basic_info_t*)d; - - cl->protocol_version = tmp->protocol; - cl->port = tmp->portnr; - cl->vpn_ip = tmp->vpn_ip; - cl->vpn_mask = tmp->vpn_mask; +cp + if(sscanf(cl->buffer, "%*d %d %lx/%lx:%hx", &cl->protocol_version, &cl->vpn_ip, &cl->vpn_mask, &cl->port) != 4) + { + syslog(LOG_ERR, "got bad BASIC_INFO request: %s", cl->buffer); + return -1; + } - if(cl->protocol_version < PROT_CURRENT) + if(cl->protocol_version != PROT_CURRENT) { - syslog(LOG_ERR, "Peer uses protocol version %d which is too old.", + syslog(LOG_ERR, "Peer uses incompatible protocol version %d.", cl->protocol_version); return -1; } @@ -416,38 +389,44 @@ int basic_info_h(conn_list_t *cl, unsigned char *d, int len) } cl->status.active = 0; - +cp return 0; } -int passphrase_h(conn_list_t *cl, unsigned char *d, int len) +int passphrase_h(conn_list_t *cl) { - passphrase_t *tmp = (passphrase_t*)d; - - cl->pp = xmalloc(tmp->len+3); - memcpy(cl->pp, tmp, tmp->len+3); - +cp + cl->pp=xmalloc(sizeof(*(cl->pp))); + if(sscanf(cl->buffer, "%*d %as", &(cl->pp->phrase)) != 1) + { + syslog(LOG_ERR, "got bad PASSPHRASE request: %s", cl->buffer); + return -1; + } + cl->pp->len = strlen(cl->pp->phrase); + if(debug_lvl > 2) - syslog(LOG_DEBUG, "got PASSPHRASE(%hd,...)", cl->pp->len); + syslog(LOG_DEBUG, "got PASSPHRASE"); if(cl->status.outgoing) send_passphrase(cl); else send_public_key(cl); - +cp return 0; } -int public_key_h(conn_list_t *cl, unsigned char *d, int len) +int public_key_h(conn_list_t *cl) { char *g_n; - public_key_t *tmp = (public_key_t*)d; +cp + if(sscanf(cl->buffer, "%*d %as", &g_n) != 1) + { + syslog(LOG_ERR, "got bad PUBLIC_KEY request: %s", cl->buffer); + return -1; + } if(debug_lvl > 2) - syslog(LOG_DEBUG, "got PUBLIC_KEY(%hd,%s)", tmp->len, &tmp->key); - - g_n = xmalloc(tmp->len+1); - strcpy(g_n, &tmp->key); + syslog(LOG_DEBUG, "got PUBLIC_KEY %s", g_n); if(verify_passphrase(cl, g_n)) { @@ -467,70 +446,63 @@ int public_key_h(conn_list_t *cl, unsigned char *d, int len) cl->status.active = 1; notify_others(cl, NULL, send_add_host); notify_one(cl); - +cp return 0; } -int ack_h(conn_list_t *cl, unsigned char *d, int len) +int ack_h(conn_list_t *cl) { +cp if(debug_lvl > 2) syslog(LOG_DEBUG, "got ACK"); cl->status.active = 1; syslog(LOG_NOTICE, "Connection with %s activated.", cl->hostname); - - /* - Now I'm going to cheat. The meta protocol is actually - a stream of requests, that may come in in the same TCP - packet. This is the only place that it will happen, - though. - I may change it in the future, if it appears that this - is not retainable. - */ - if(len > 1) /* An ADD_HOST follows */ - { - if(request_handlers[d[1]] == NULL) - syslog(LOG_ERR, "Unknown request %d.", d[1]); - if(request_handlers[d[1]](cl, d + 1, len - 1) < 0) - return -1; - } - +cp return 0; } -int termreq_h(conn_list_t *cl, unsigned char *d, int len) +int termreq_h(conn_list_t *cl) { +cp syslog(LOG_NOTICE, IP_ADDR_S " wants to quit", IP_ADDR_V(cl->vpn_ip)); cl->status.termreq = 1; terminate_connection(cl); notify_others(cl, NULL, send_del_host); - +cp return 0; } -int timeout_h(conn_list_t *cl, unsigned char *d, int len) +int timeout_h(conn_list_t *cl) { +cp syslog(LOG_NOTICE, IP_ADDR_S " says it's gotten a timeout from us", IP_ADDR_V(cl->vpn_ip)); cl->status.termreq = 1; terminate_connection(cl); - +cp return 0; } -int del_host_h(conn_list_t *cl, unsigned char *d, int len) +int del_host_h(conn_list_t *cl) { - del_host_t *tmp = (del_host_t*)d; + ip_t vpn_ip; conn_list_t *fw; +cp + if(sscanf(cl->buffer, "%*d %lx", &vpn_ip) != 1) + { + syslog(LOG_ERR, "got bad DEL_HOST request: %s", cl->buffer); + return -1; + } if(debug_lvl > 2) syslog(LOG_DEBUG, "got DEL_HOST for " IP_ADDR_S, - IP_ADDR_V(tmp->vpn_ip)); + IP_ADDR_V(vpn_ip)); - if(!(fw = lookup_conn(tmp->vpn_ip))) + if(!(fw = lookup_conn(vpn_ip))) { syslog(LOG_ERR, "Somebody wanted to delete " IP_ADDR_S " which does not exist?", - IP_ADDR_V(tmp->vpn_ip)); + IP_ADDR_V(vpn_ip)); return 0; } @@ -538,209 +510,241 @@ int del_host_h(conn_list_t *cl, unsigned char *d, int len) fw->status.termreq = 1; terminate_connection(fw); - +cp return 0; } -int ping_h(conn_list_t *cl, unsigned char *d, int len) +int ping_h(conn_list_t *cl) { +cp if(debug_lvl > 3) syslog(LOG_DEBUG, "responding to ping from " IP_ADDR_S, IP_ADDR_V(cl->vpn_ip)); cl->status.pinged = 0; cl->status.got_pong = 1; send_pong(cl); - +cp return 0; } -int pong_h(conn_list_t *cl, unsigned char *d, int len) +int pong_h(conn_list_t *cl) { +cp if(debug_lvl > 3) syslog(LOG_DEBUG, "ok, got pong from " IP_ADDR_S, IP_ADDR_V(cl->vpn_ip)); cl->status.got_pong = 1; - +cp return 0; } -int add_host_h(conn_list_t *cl, unsigned char *d, int len) +int add_host_h(conn_list_t *cl) { - add_host_t *tmp = (add_host_t*)d; + ip_t real_ip; + ip_t vpn_ip; + ip_t vpn_mask; + unsigned short port; conn_list_t *ncn, *fw; +cp + if(sscanf(cl->buffer, "%*d %lx %lx/%lx:%hx", &real_ip, &vpn_ip, &vpn_mask, &port) != 4) + { + syslog(LOG_ERR, "got bad ADD_HOST request: %s", cl->buffer); + return -1; + } if(debug_lvl > 2) syslog(LOG_DEBUG, "Add host request from " IP_ADDR_S, IP_ADDR_V(cl->vpn_ip)); if(debug_lvl > 3) syslog(LOG_DEBUG, "got ADD_HOST(" IP_ADDR_S "," IP_ADDR_S ",%hd)", - IP_ADDR_V(tmp->vpn_ip), IP_ADDR_V(tmp->vpn_mask), tmp->portnr); + IP_ADDR_V(vpn_ip), IP_ADDR_V(vpn_mask), port); /* Suggestion of Hans Bayle */ - if((fw = lookup_conn(tmp->vpn_ip))) + if((fw = lookup_conn(vpn_ip))) { notify_others(fw, cl, send_add_host); return 0; } ncn = new_conn_list(); - ncn->real_ip = tmp->real_ip; - ncn->vpn_ip = tmp->vpn_ip; - ncn->vpn_mask = tmp->vpn_mask; - ncn->port = tmp->portnr; - ncn->hostname = hostlookup(tmp->real_ip); + ncn->real_ip = real_ip; + ncn->vpn_ip = vpn_ip; + ncn->vpn_mask = vpn_mask; + ncn->port = port; + ncn->hostname = hostlookup(real_ip); ncn->nexthop = cl; ncn->next = conn_list; conn_list = ncn; ncn->status.active = 1; notify_others(ncn, cl, send_add_host); - - /* - again, i'm cheating here. see the comment in ack_h. - Naughty zarq! Now you see what cheating will get you... [GS] - */ - if(len > sizeof(add_host_t)) /* Another ADD_HOST follows */ - { - if(request_handlers[d[sizeof(add_host_t)]] == NULL) - syslog(LOG_ERR, "Unknown request %d.", d[sizeof(add_host_t)]); - if(request_handlers[d[sizeof(add_host_t)]](cl, d + sizeof(add_host_t), len - sizeof(add_host_t)) < 0) - return -1; - } - +cp return 0; } -int req_key_h(conn_list_t *cl, unsigned char *d, int len) +int req_key_h(conn_list_t *cl) { - key_req_t *tmp = (key_req_t*)d; + ip_t to; + ip_t from; conn_list_t *fw; +cp + if(sscanf(cl->buffer, "%*d %lx %lx", &to, &from) != 2) + { + syslog(LOG_ERR, "got bad request: %s", cl->buffer); + return -1; + } if(debug_lvl > 2) syslog(LOG_DEBUG, "got REQ_KEY from " IP_ADDR_S " for " IP_ADDR_S, - IP_ADDR_V(tmp->from), IP_ADDR_V(tmp->to)); + IP_ADDR_V(from), IP_ADDR_V(to)); - if((tmp->to & myself->vpn_mask) == (myself->vpn_ip & myself->vpn_mask)) + if((to & myself->vpn_mask) == (myself->vpn_ip & myself->vpn_mask)) { /* hey! they want something from ME! :) */ - send_key_answer(cl, tmp->from); + send_key_answer(cl, from); return 0; } - fw = lookup_conn(tmp->to); + fw = lookup_conn(to); if(!fw) - { - syslog(LOG_ERR, "Attempting to forward key request to " IP_ADDR_S ", which does not exist?", - IP_ADDR_V(tmp->to)); - return -1; - } + { + syslog(LOG_ERR, "Attempting to forward key request to " IP_ADDR_S ", which does not exist?", + IP_ADDR_V(to)); + return -1; + } if(debug_lvl > 3) syslog(LOG_DEBUG, "Forwarding request for public key to " IP_ADDR_S, IP_ADDR_V(fw->nexthop->vpn_ip)); - if(send(fw->nexthop->meta_socket, tmp, sizeof(key_req_t), 0) < 0) + + cl->buffer[cl->reqlen-1] = '\n'; + + if(write(fw->nexthop->meta_socket, cl->buffer, cl->reqlen) < 0) { syslog(LOG_ERR, "send failed: %s:%d: %m", __FILE__, __LINE__); return -1; } - +cp return 0; } -void set_keys(conn_list_t *cl, key_req_t *k) +void set_keys(conn_list_t *cl, int expiry, char *key) { char *ek; - +cp if(!cl->public_key) { - cl->public_key = xmalloc(sizeof(enc_key_t)); + cl->public_key = xmalloc(sizeof(*cl->key)); cl->public_key->key = NULL; } + if(cl->public_key->key) free(cl->public_key->key); - cl->public_key->length = k->len; - cl->public_key->expiry = k->expiry; - cl->public_key->key = xmalloc(k->len + 1); - strcpy(cl->public_key->key, &(k->key)); + cl->public_key->length = strlen(key); + cl->public_key->expiry = expiry; + cl->public_key->key = xmalloc(cl->public_key->length + 1); + strcpy(cl->public_key->key, key); - ek = make_shared_key(&(k->key)); + ek = make_shared_key(key); + if(!cl->key) { - cl->key = xmalloc(sizeof(enc_key_t)); + cl->key = xmalloc(sizeof(*cl->key)); cl->key->key = NULL; } + if(cl->key->key) free(cl->key->key); + cl->key->length = strlen(ek); - cl->key->expiry = k->expiry; - cl->key->key = xmalloc(strlen(ek) + 1); + cl->key->expiry = expiry; + cl->key->key = xmalloc(cl->key->length + 1); strcpy(cl->key->key, ek); +cp } -int ans_key_h(conn_list_t *cl, unsigned char *d, int len) +int ans_key_h(conn_list_t *cl) { - key_req_t *tmp = (key_req_t*)d; + ip_t to; + ip_t from; + int expiry; + char *key; conn_list_t *fw, *gk; +cp + if(sscanf(cl->buffer, "%*d %lx %lx %d %as", &to, &from, &expiry, &key) != 4) + { + syslog(LOG_ERR, "got bad ANS_KEY request: %s", cl->buffer); + return -1; + } if(debug_lvl > 3) syslog(LOG_DEBUG, "got ANS_KEY from " IP_ADDR_S " for " IP_ADDR_S, - IP_ADDR_V(tmp->from), IP_ADDR_V(tmp->to)); + IP_ADDR_V(from), IP_ADDR_V(to)); - if(tmp->to == myself->vpn_ip) + if(to == myself->vpn_ip) { /* hey! that key's for ME! :) */ if(debug_lvl > 2) syslog(LOG_DEBUG, "Yeah! key arrived. Now do something with it."); - gk = lookup_conn(tmp->from); + gk = lookup_conn(from); if(!gk) { syslog(LOG_ERR, "Receiving key from " IP_ADDR_S ", which does not exist?", - IP_ADDR_V(tmp->from)); + IP_ADDR_V(from)); return -1; } - set_keys(gk, tmp); + set_keys(gk, expiry, key); gk->status.validkey = 1; gk->status.waitingforkey = 0; flush_queues(gk); return 0; } - fw = lookup_conn(tmp->to); + fw = lookup_conn(to); if(!fw) - { - syslog(LOG_ERR, "Attempting to forward key to " IP_ADDR_S ", which does not exist?", - IP_ADDR_V(tmp->to)); - return -1; - } + { + syslog(LOG_ERR, "Attempting to forward key to " IP_ADDR_S ", which does not exist?", + IP_ADDR_V(to)); + return -1; + } if(debug_lvl > 2) syslog(LOG_DEBUG, "Forwarding public key to " IP_ADDR_S, IP_ADDR_V(fw->nexthop->vpn_ip)); - if(send(fw->nexthop->meta_socket, tmp, sizeof(key_req_t)+tmp->len, 0) < 0) + + cl->buffer[cl->reqlen-1] = '\n'; + + if((write(fw->nexthop->meta_socket, cl->buffer, cl->reqlen)) < 0) { syslog(LOG_ERR, "send failed: %s:%d: %m", __FILE__, __LINE__); return -1; } - +cp return 0; } -int key_changed_h(conn_list_t *cl, unsigned char *d, int len) +int key_changed_h(conn_list_t *cl) { - key_changed_t *tmp = (key_changed_t*)d; + ip_t from; conn_list_t *ik; +cp + if(sscanf(cl->buffer, "%*d %lx", &from) != 1) + { + syslog(LOG_ERR, "got bad ANS_KEY request: %s", cl->buffer); + return -1; + } if(debug_lvl > 2) syslog(LOG_DEBUG, "got KEY_CHANGED from " IP_ADDR_S, - IP_ADDR_V(tmp->from)); + IP_ADDR_V(from)); - ik = lookup_conn(tmp->from); + ik = lookup_conn(from); if(!ik) { syslog(LOG_ERR, "Got changed key from " IP_ADDR_S ", which does not exist?", - IP_ADDR_V(tmp->from)); + IP_ADDR_V(from)); return -1; } @@ -751,11 +755,11 @@ int key_changed_h(conn_list_t *cl, unsigned char *d, int len) syslog(LOG_DEBUG, "Forwarding key invalidation request"); notify_others(cl, ik, send_key_changed); - +cp return 0; } -int (*request_handlers[256])(conn_list_t*, unsigned char*, int) = { +int (*request_handlers[256])(conn_list_t*) = { 0, ack_h, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, @@ -777,4 +781,3 @@ int (*request_handlers[256])(conn_list_t*, unsigned char*, int) = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }; -