X-Git-Url: https://www.tinc-vpn.org/git/browse?p=tinc;a=blobdiff_plain;f=src%2Fprotocol.c;h=0a27692e89282f26dd9e95b2a6dc85b3e35d42cc;hp=44f012f75acc7698fd43f7eae16e2b89eed87c1c;hb=a9247e6f2c57bda9dc62ed050f41048847109e83;hpb=eb1c9814e6b2a5206be1fadf19e0dc779690a69e diff --git a/src/protocol.c b/src/protocol.c index 44f012f7..0a27692e 100644 --- a/src/protocol.c +++ b/src/protocol.c @@ -24,6 +24,7 @@ #include #include #include +#include #include #include @@ -34,36 +35,38 @@ #include "netutl.h" #include "protocol.h" +char buffer[MAXBUFSIZE]; +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((write(cl->meta_socket, &tmp, sizeof(tmp))) < 0) + buflen = sprintf(buffer, "%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; cp - memset(&tmp, 0, sizeof(tmp)); - tmp.type = TERMREQ; - tmp.vpn_ip = myself->vpn_ip; - 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((write(cl->meta_socket, &tmp, sizeof(tmp))) < 0) + buflen = sprintf(buffer, "%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; @@ -74,17 +77,14 @@ cp int send_timeout(conn_list_t *cl) { - termreq_t tmp; cp - memset(&tmp, 0, sizeof(tmp)); - tmp.type = PINGTIMEOUT; - tmp.vpn_ip = myself->vpn_ip; - 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((write(cl->meta_socket, &tmp, sizeof(tmp))) < 0) + buflen = sprintf(buffer, "%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; @@ -95,17 +95,14 @@ cp int send_del_host(conn_list_t *cl, conn_list_t *new_host) { - del_host_t tmp; cp - memset(&tmp, 0, sizeof(tmp)); - tmp.type = DEL_HOST; - tmp.vpn_ip = new_host->vpn_ip; - 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 = sprintf(buffer, "%d %lx\n", DEL_HOST, new_host->vpn_ip); - if((write(cl->meta_socket, &tmp, sizeof(tmp))) < 0) + if((write(cl->meta_socket, buffer, buflen)) < 0) { syslog(LOG_ERR, "send failed: %s:%d: %m", __FILE__, __LINE__); return -1; @@ -116,12 +113,13 @@ cp 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((write(cl->meta_socket, &tmp, sizeof(tmp))) < 0) + buflen = sprintf(buffer, "%d\n", PING); + + if((write(cl->meta_socket, buffer, buflen)) < 0) { syslog(LOG_ERR, "send failed: %s:%d: %m", __FILE__, __LINE__); return -1; @@ -132,9 +130,10 @@ cp int send_pong(conn_list_t *cl) { - unsigned char tmp = PONG; cp - if((write(cl->meta_socket, &tmp, sizeof(tmp))) < 0) + buflen = sprintf(buffer, "%d\n", PONG); + + if((write(cl->meta_socket, buffer, buflen)) < 0) { syslog(LOG_ERR, "send failed: %s:%d: %m", __FILE__, __LINE__); return -1; @@ -145,21 +144,14 @@ cp int send_add_host(conn_list_t *cl, conn_list_t *new_host) { - add_host_t tmp; cp - memset(&tmp, 0, sizeof(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; - 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((write(cl->meta_socket, &tmp, sizeof(tmp))) < 0) + buflen = sprintf(buffer, "%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; @@ -170,17 +162,14 @@ cp int send_key_changed(conn_list_t *cl, conn_list_t *src) { - key_changed_t tmp; cp - memset(&tmp, 0, sizeof(tmp)); - tmp.type = KEY_CHANGED; - tmp.from = src->vpn_ip; - 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)); + + buflen = sprintf(buffer, "%d %lx\n", KEY_CHANGED, src->vpn_ip); - if((write(cl->meta_socket, &tmp, sizeof(tmp))) < 0) + if((write(cl->meta_socket, buffer, buflen)) < 0) { syslog(LOG_ERR, "send failed: %s:%d: %m", __FILE__, __LINE__); return -1; @@ -201,22 +190,14 @@ cp int send_basic_info(conn_list_t *cl) { - basic_info_t tmp; cp - memset(&tmp, 0, sizeof(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; - 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((write(cl->meta_socket, &tmp, sizeof(tmp))) < 0) + buflen = sprintf(buffer, "%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; @@ -229,15 +210,15 @@ int send_passphrase(conn_list_t *cl) { passphrase_t tmp; cp - memset(&tmp, 0, sizeof(tmp)); - tmp.type = PASSPHRASE; 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)); + + buflen = snprintf(buffer, MAXBUFSIZE, "%d %s\n", PASSPHRASE, tmp.phrase); - if((write(cl->meta_socket, &tmp, tmp.len+3)) < 0) + if((write(cl->meta_socket, buffer, buflen)) < 0) { syslog(LOG_ERR, "send failed: %s:%d: %m", __FILE__, __LINE__); return -1; @@ -248,19 +229,14 @@ cp int send_public_key(conn_list_t *cl) { - public_key_t *tmp; cp - tmp = (public_key_t*)xmalloc(strlen(my_public_key_base36)+sizeof(*tmp)); - memset(tmp, 0, sizeof(*tmp)); - tmp->type = PUBLIC_KEY; - tmp->len = strlen(my_public_key_base36); - strcpy(&tmp->key, my_public_key_base36); - 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 = sprintf(buffer, "%d %s\n", PUBLIC_KEY, my_public_key_base36); - if((write(cl->meta_socket, tmp, tmp->len+sizeof(*tmp))) < 0) + if((write(cl->meta_socket, buffer, buflen)) < 0) { syslog(LOG_ERR, "send failed: %s:%d: %m", __FILE__, __LINE__); return -1; @@ -271,15 +247,10 @@ cp int send_calculate(conn_list_t *cl, char *k) { - calculate_t *tmp; cp - tmp = xmalloc(strlen(k)+sizeof(*tmp)); - memset(tmp, 0, sizeof(*tmp)); - tmp->type = CALCULATE; - tmp->len = strlen(k); - strcpy(&tmp->key, k); + buflen = sprintf(buffer, "%d %s\n", CALCULATE, k); - if((write(cl->meta_socket, tmp, tmp->len+sizeof(*tmp))) < 0) + if((write(cl->meta_socket, buffer, buflen)) < 0) { syslog(LOG_ERR, "send failed: %s:%d: %m", __FILE__, __LINE__); return -1; @@ -290,16 +261,8 @@ cp int send_key_request(ip_t to) { - key_req_t *tmp; conn_list_t *fw; cp - tmp = xmalloc(sizeof(*tmp)); - memset(tmp, 0, sizeof(*tmp)); - tmp->type = REQ_KEY; - tmp->to = to; - tmp->from = myself->vpn_ip; - tmp->len = 0; - fw = lookup_conn(to); if(!fw) { @@ -311,7 +274,10 @@ cp 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(write(fw->nexthop->meta_socket, tmp, sizeof(*tmp)) < 0) + + buflen = sprintf(buffer, "%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; @@ -323,39 +289,25 @@ cp int send_key_answer(conn_list_t *cl, ip_t to) { - key_req_t *tmp; conn_list_t *fw; cp - tmp = xmalloc(sizeof(*tmp)+strlen(my_public_key_base36)); - memset(tmp, 0, sizeof(*tmp)); - 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 - syslog(LOG_DEBUG, "key sent = %s", my_public_key_base36); -cp - fw = lookup_conn(to); + fw = lookup_conn(to); -cp if(!fw) { syslog(LOG_ERR, "Attempting to send key answer to " IP_ADDR_S ", which does not exist?", IP_ADDR_V(to)); return -1; } -cp - syslog(LOG_DEBUG, "key sent = %s", &(tmp->key)); -cp if(debug_lvl > 2) syslog(LOG_DEBUG, "Sending public key to " IP_ADDR_S, IP_ADDR_V(fw->nexthop->vpn_ip)); -cp - if(write(fw->nexthop->meta_socket, tmp, sizeof(*tmp)+tmp->len) < 0) + + buflen = sprintf(buffer, "%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; @@ -375,7 +327,7 @@ int notify_others(conn_list_t *new, conn_list_t *source, 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; @@ -402,22 +354,16 @@ cp int basic_info_h(conn_list_t *cl) { - basic_info_t tmp; cp - if(read(cl->meta_socket, &((char*)(&tmp))[1], sizeof(tmp)-1) <= 0) + if(sscanf(cl->buffer, "%*d %d %lx/%lx:%hx", &cl->protocol_version, &cl->vpn_ip, &cl->vpn_mask, &cl->port) != 4) { - syslog(LOG_ERR, "%d: Receive failed: %m", __LINE__); - return -1; - } - - cl->protocol_version = tmp.protocol; - cl->port = tmp.portnr; - cl->vpn_ip = tmp.vpn_ip; - cl->vpn_mask = tmp.vpn_mask; + 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; } @@ -449,32 +395,17 @@ cp int passphrase_h(conn_list_t *cl) { - char unused; - unsigned short int len; cp - if(read(cl->meta_socket, &unused, sizeof(unused)) <= 0) + cl->pp=xmalloc(sizeof(*(cl->pp))); + if(sscanf(cl->buffer, "%*d %as", &(cl->pp->phrase)) != 1) { - syslog(LOG_ERR, "%d: Receive failed: %m", __LINE__); + syslog(LOG_ERR, "got bad PASSPHRASE request: %s", cl->buffer); return -1; } - - if(read(cl->meta_socket, &len, sizeof(len)) <= 0) - { - syslog(LOG_ERR, "%d: Receive failed: %m", __LINE__); - return -1; - } - - cl->pp = xmalloc(len+4); - - cl->pp->len = len; - if(read(cl->meta_socket, &(cl->pp->phrase), len) <= 0) - { - syslog(LOG_ERR, "%d: Receive failed: %m", __LINE__); - return -1; - } - + cl->pp->len = strlen(cl->pp->phrase); + if(debug_lvl > 2) - syslog(LOG_DEBUG, "got PASSPHRASE(%hd,...)", len); + syslog(LOG_DEBUG, "got PASSPHRASE"); if(cl->status.outgoing) send_passphrase(cl); @@ -487,30 +418,15 @@ cp int public_key_h(conn_list_t *cl) { char *g_n; - unsigned short int len; - char unused; cp - if(read(cl->meta_socket, &unused, sizeof(unused)) <= 0) - { - syslog(LOG_ERR, "%d: Receive failed: %m", __LINE__); - return -1; - } - if(read(cl->meta_socket, &len, sizeof(len)) <= 0) + if(sscanf(cl->buffer, "%*d %as", &g_n) != 1) { - syslog(LOG_ERR, "%d: Receive failed: %m", __LINE__); - return -1; - } - - g_n = xmalloc(len+2); - - if(read(cl->meta_socket, g_n, len+2) <= 0) - { - syslog(LOG_ERR, "%d: Receive failed: %m", __LINE__); - return -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)", len, g_n); + syslog(LOG_DEBUG, "got PUBLIC_KEY %s", g_n); if(verify_passphrase(cl, g_n)) { @@ -570,23 +486,23 @@ cp int del_host_h(conn_list_t *cl) { - del_host_t tmp; + ip_t vpn_ip; conn_list_t *fw; cp - if(read(cl->meta_socket, &((char*)(&tmp))[1], sizeof(tmp)-1) <= 0) + if(sscanf(cl->buffer, "%*d %lx", &vpn_ip) != 1) { - syslog(LOG_ERR, "%d: Receive failed: %m", __LINE__); - return -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; } @@ -623,36 +539,39 @@ cp int add_host_h(conn_list_t *cl) { - add_host_t tmp; + ip_t real_ip; + ip_t vpn_ip; + ip_t vpn_mask; + unsigned short port; conn_list_t *ncn, *fw; cp - if(read(cl->meta_socket, &((char*)(&tmp))[1], sizeof(tmp)-1) <= 0) + if(sscanf(cl->buffer, "%*d %lx %lx/%lx:%hx", &real_ip, &vpn_ip, &vpn_mask, &port) != 4) { - syslog(LOG_ERR, "%d: Receive failed: %m", __LINE__); - return -1; - } + 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; @@ -664,31 +583,32 @@ cp int req_key_h(conn_list_t *cl) { - key_req_t tmp; + ip_t to; + ip_t from; conn_list_t *fw; cp - if(read(cl->meta_socket, &((char*)(&tmp))[1], sizeof(tmp)-1) <= 0) + if(sscanf(cl->buffer, "%*d %lx %lx", &to, &from) != 2) { - syslog(LOG_ERR, "%d: Receive failed: %m", __LINE__); - return -1; - } + 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)); + IP_ADDR_V(to)); return -1; } @@ -696,9 +616,7 @@ cp syslog(LOG_DEBUG, "Forwarding request for public key to " IP_ADDR_S, IP_ADDR_V(fw->nexthop->vpn_ip)); - tmp.type = REQ_KEY; - tmp.key = 0; - if(write(fw->nexthop->meta_socket, &tmp, sizeof(tmp)) < 0) + if(write(fw->nexthop->meta_socket, cl->buffer, strlen(cl->buffer)) < 0) { syslog(LOG_ERR, "send failed: %s:%d: %m", __FILE__, __LINE__); return -1; @@ -707,7 +625,7 @@ cp return 0; } -void set_keys(conn_list_t *cl, key_req_t *k, char *key) +void set_keys(conn_list_t *cl, int expiry, char *key) { char *ek; cp @@ -716,93 +634,84 @@ cp 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); + 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(key); + if(!cl->key) { 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) { - key_req_t tmp; - conn_list_t *fw, *gk; + ip_t to; + ip_t from; + int expiry; char *key; + conn_list_t *fw, *gk; cp - if(read(cl->meta_socket, &((char*)(&tmp))[1], sizeof(tmp)-2) <= 0) + if(sscanf(cl->buffer, "%*d %lx %lx %d %as", &to, &from, &expiry, &key) != 4) { - syslog(LOG_ERR, "%d: Receive failed: %m", __LINE__); - return -1; - } - - key = xmalloc(tmp.len); - - if(read(cl->meta_socket, key, tmp.len + 1) <= 0) - { - syslog(LOG_ERR, "%d: Receive failed: %m", __LINE__); - return -1; - } - - syslog(LOG_DEBUG, "key = %s", key); + 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, key); + 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)); + 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)); - tmp.type = ANS_KEY; - if(write(fw->nexthop->meta_socket, &tmp, sizeof(tmp) -1) < 0) - { - syslog(LOG_ERR, "send failed: %s:%d: %m", __FILE__, __LINE__); - return -1; - } - if(write(fw->nexthop->meta_socket, key, tmp.len + 1) < 0) + + if((write(fw->nexthop->meta_socket, cl->buffer, strlen(cl->buffer))) < 0) { syslog(LOG_ERR, "send failed: %s:%d: %m", __FILE__, __LINE__); return -1; @@ -813,25 +722,25 @@ cp int key_changed_h(conn_list_t *cl) { - key_changed_t tmp; + ip_t from; conn_list_t *ik; cp - if(read(cl->meta_socket, &((char*)(&tmp))[1], sizeof(tmp)-1) <= 0) + if(sscanf(cl->buffer, "%*d %lx", &from) != 1) { - syslog(LOG_ERR, "%d: Receive failed: %m", __LINE__); - return -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; }