X-Git-Url: https://www.tinc-vpn.org/git/browse?p=tinc;a=blobdiff_plain;f=src%2Fnet.c;h=5e8cfaffaa8a103c819516a664fc4dda80469940;hp=bc32b7cc7763e0e14eb27e23d1a2a64da042fba0;hb=cf49b2c0647554613874cce495e4a7937a9f7863;hpb=f95cc86d0c14ca4c47e5459af4bb6d1170baa9f5 diff --git a/src/net.c b/src/net.c index bc32b7cc..5e8cfaff 100644 --- a/src/net.c +++ b/src/net.c @@ -17,31 +17,47 @@ along with this program; if not, write to the Free Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. - $Id: net.c,v 1.35.4.68 2000/11/07 21:43:28 guus Exp $ + $Id: net.c,v 1.35.4.81 2000/11/24 23:13:02 guus Exp $ */ #include "config.h" -#include #include #include -#include -#include #include #include #include #include #include #include -#include #include #include #include #include #include -#include -#include -#include +/* SunOS really wants sys/socket.h BEFORE net/if.h, + and FreeBSD wants these lines below the rest. */ +#include +#include +#include + +#ifdef HAVE_OPENSSL_RAND_H +# include +#else +# include +#endif + +#ifdef HAVE_OPENSSL_EVP_H +# include +#else +# include +#endif + +#ifdef HAVE_OPENSSL_ERR_H +# include +#else +# include +#endif #ifdef HAVE_TUNTAP #include LINUX_IF_TUN_H @@ -51,10 +67,12 @@ #include #include "conf.h" -#include "connlist.h" +#include "connection.h" +#include "list.h" #include "meta.h" #include "net.h" #include "netutl.h" +#include "process.h" #include "protocol.h" #include "subnet.h" @@ -77,56 +95,7 @@ char *unknown = NULL; subnet_t mymac; -/* - Execute the given script. - This function doesn't really belong here. -*/ -int execute_script(const char *name) -{ - char *scriptname; - pid_t pid; - char *s; - - if((pid = fork()) < 0) - { - syslog(LOG_ERR, _("System call `%s' failed: %m"), - "fork"); - return -1; - } - - if(pid) - { - return 0; - } - - /* Child here */ - - if(netname) - { - asprintf(&s, "NETNAME=%s", netname); - putenv(s); /* Don't free s! see man 3 putenv */ - } - else - { - unsetenv("NETNAME"); - } - - chdir(confbase); /* This cannot fail since we already read config files from this directory. */ - - asprintf(&scriptname, "%s/%s", confbase, name); - execl(scriptname, NULL); - - /* No return on success */ - - if(errno != ENOENT) /* Ignore if the file does not exist */ - syslog(LOG_WARNING, _("Error executing `%s': %m"), scriptname); - - /* No need to free things */ - - exit(0); -} - -int xsend(conn_list_t *cl, vpn_packet_t *inpkt) +int xsend(connection_t *cl, vpn_packet_t *inpkt) { vpn_packet_t outpkt; int outlen, outpad; @@ -162,7 +131,7 @@ cp return 0; } -int xrecv(conn_list_t *cl, vpn_packet_t *inpkt) +int xrecv(connection_t *cl, vpn_packet_t *inpkt) { vpn_packet_t outpkt; int outlen, outpad; @@ -285,8 +254,8 @@ cp each packet, and removing it when that returned a zero exit code */ -void flush_queue(conn_list_t *cl, packet_queue_t **pq, - int (*function)(conn_list_t*,vpn_packet_t*)) +void flush_queue(connection_t *cl, packet_queue_t **pq, + int (*function)(connection_t*,vpn_packet_t*)) { queue_element_t *p, *next = NULL; cp @@ -310,7 +279,7 @@ cp void because nothing goes wrong here, packets remain in the queue if something goes wrong */ -void flush_queues(conn_list_t *cl) +void flush_queues(connection_t *cl) { cp if(cl->sq) @@ -336,7 +305,7 @@ cp */ int send_packet(ip_t to, vpn_packet_t *packet) { - conn_list_t *cl; + connection_t *cl; subnet_t *subnet; cp if((subnet = lookup_subnet_ipv4(to)) == NULL) @@ -415,7 +384,9 @@ int setup_tap_fd(void) int nfd; const char *tapfname; config_t const *cfg; +#ifdef HAVE_TUNTAP struct ifreq ifr; +#endif cp if((cfg = get_config_val(config, config_tapdevice))) @@ -483,6 +454,7 @@ cp if(setsockopt(nfd, SOL_SOCKET, SO_REUSEADDR, &one, sizeof(one))) { + close(nfd); syslog(LOG_ERR, _("System call `%s' failed: %m"), "setsockopt"); return -1; @@ -490,6 +462,7 @@ cp if(setsockopt(nfd, SOL_SOCKET, SO_KEEPALIVE, &one, sizeof(one))) { + close(nfd); syslog(LOG_ERR, _("System call `%s' failed: %m"), "setsockopt"); return -1; @@ -498,6 +471,7 @@ cp flags = fcntl(nfd, F_GETFL); if(fcntl(nfd, F_SETFL, flags | O_NONBLOCK) < 0) { + close(nfd); syslog(LOG_ERR, _("System call `%s' failed: %m"), "fcntl"); return -1; @@ -507,6 +481,7 @@ cp { if(setsockopt(nfd, SOL_SOCKET, SO_KEEPALIVE, cfg->data.ptr, strlen(cfg->data.ptr))) { + close(nfd); syslog(LOG_ERR, _("Unable to bind listen socket to interface %s: %m"), cfg->data.ptr); return -1; } @@ -523,12 +498,14 @@ cp if(bind(nfd, (struct sockaddr *)&a, sizeof(struct sockaddr))) { + close(nfd); syslog(LOG_ERR, _("Can't bind to port %hd/tcp: %m"), port); return -1; } if(listen(nfd, 3)) { + close(nfd); syslog(LOG_ERR, _("System call `%s' failed: %m"), "listen"); return -1; @@ -549,12 +526,14 @@ int setup_vpn_in_socket(int port) cp if((nfd = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP)) < 0) { + close(nfd); syslog(LOG_ERR, _("Creating socket failed: %m")); return -1; } if(setsockopt(nfd, SOL_SOCKET, SO_REUSEADDR, &one, sizeof(one))) { + close(nfd); syslog(LOG_ERR, _("System call `%s' failed: %m"), "setsockopt"); return -1; @@ -563,6 +542,7 @@ cp flags = fcntl(nfd, F_GETFL); if(fcntl(nfd, F_SETFL, flags | O_NONBLOCK) < 0) { + close(nfd); syslog(LOG_ERR, _("System call `%s' failed: %m"), "fcntl"); return -1; @@ -575,6 +555,7 @@ cp if(bind(nfd, (struct sockaddr *)&a, sizeof(struct sockaddr))) { + close(nfd); syslog(LOG_ERR, _("Can't bind to port %hd/udp: %m"), port); return -1; } @@ -585,7 +566,7 @@ cp /* setup an outgoing meta (tcp) socket */ -int setup_outgoing_meta_socket(conn_list_t *cl) +int setup_outgoing_meta_socket(connection_t *cl) { int flags; struct sockaddr_in a; @@ -613,6 +594,7 @@ cp if(connect(cl->meta_socket, (struct sockaddr *)&a, sizeof(a)) == -1) { + close(cl->meta_socket); syslog(LOG_ERR, _("%s port %hd: %m"), cl->hostname, cl->port); return -1; } @@ -620,6 +602,7 @@ cp flags = fcntl(cl->meta_socket, F_GETFL); if(fcntl(cl->meta_socket, F_SETFL, flags | O_NONBLOCK) < 0) { + close(cl->meta_socket); syslog(LOG_ERR, _("fcntl for %s port %d: %m"), cl->hostname, cl->port); return -1; @@ -643,7 +626,7 @@ cp */ int setup_outgoing_connection(char *name) { - conn_list_t *ncn; + connection_t *ncn; struct hostent *h; config_t const *cfg; cp @@ -653,27 +636,27 @@ cp return -1; } - ncn = new_conn_list(); + ncn = new_connection(); asprintf(&ncn->name, "%s", name); if(read_host_config(ncn)) { syslog(LOG_ERR, _("Error reading host configuration file for %s")); - free_conn_list(ncn); + free_connection(ncn); return -1; } if(!(cfg = get_config_val(ncn->config, config_address))) { syslog(LOG_ERR, _("No address specified for %s")); - free_conn_list(ncn); + free_connection(ncn); return -1; } if(!(h = gethostbyname(cfg->data.ptr))) { syslog(LOG_ERR, _("Error looking up `%s': %m"), cfg->data.ptr); - free_conn_list(ncn); + free_connection(ncn); return -1; } @@ -684,7 +667,7 @@ cp { syslog(LOG_ERR, _("Could not set up a meta connection to %s"), ncn->hostname); - free_conn_list(ncn); + free_connection(ncn); return -1; } @@ -693,7 +676,7 @@ cp ncn->buflen = 0; ncn->last_ping_time = time(NULL); - conn_list_add(ncn); + connection_add(ncn); send_id(ncn); cp @@ -701,7 +684,7 @@ cp } /* - Configure conn_list_t myself and set up the local sockets (listen only) + Configure connection_t myself and set up the local sockets (listen only) */ int setup_myself(void) { @@ -709,7 +692,7 @@ int setup_myself(void) config_t *next; subnet_t *net; cp - myself = new_conn_list(); + myself = new_connection(); asprintf(&myself->hostname, "MYSELF"); /* FIXME? Do hostlookup on ourselves? */ myself->flags = 0; @@ -867,6 +850,9 @@ int setup_network_connections(void) { config_t const *cfg; cp + init_connections(); + init_subnets(); + if((cfg = get_config_val(config, config_pingtimeout)) == NULL) timeout = 60; else @@ -881,12 +867,12 @@ cp if(setup_tap_fd() < 0) return -1; - if(setup_myself() < 0) - return -1; - /* Run tinc-up script to further initialize the tap interface */ execute_script("tinc-up"); + if(setup_myself() < 0) + return -1; + if(!(cfg = get_config_val(config, config_connectto))) /* No upstream IP given, we're listen only. */ return 0; @@ -913,10 +899,12 @@ cp */ void close_network_connections(void) { - conn_list_t *p; + rbl_t *rbl; + connection_t *p; cp - for(p = conn_list; p != NULL; p = p->next) + RBL_FOREACH(connection_tree, rbl) { + p = (connection_t *)rbl->data; p->status.active = 0; terminate_connection(p); } @@ -925,7 +913,7 @@ cp if(myself->status.active) { close(myself->meta_socket); - free_conn_list(myself); + free_connection(myself); myself = NULL; } @@ -934,9 +922,7 @@ cp /* Execute tinc-down script right after shutting down the interface */ execute_script("tinc-down"); - destroy_conn_list(); - - syslog(LOG_NOTICE, _("Terminating")); + destroy_connection_tree(); cp return; } @@ -944,7 +930,7 @@ cp /* create a data (udp) socket */ -int setup_vpn_connection(conn_list_t *cl) +int setup_vpn_connection(connection_t *cl) { int nfd, flags; struct sockaddr_in a; @@ -962,6 +948,7 @@ cp if(setsockopt(nfd, SOL_SOCKET, SO_REUSEADDR, &one, sizeof(one))) { + close(nfd); syslog(LOG_ERR, _("System call `%s' failed: %m"), "setsockopt"); return -1; @@ -970,6 +957,7 @@ cp flags = fcntl(nfd, F_GETFL); if(fcntl(nfd, F_SETFL, flags | O_NONBLOCK) < 0) { + close(nfd); syslog(LOG_ERR, _("System call `%s' failed: %m"), "fcntl"); return -1; @@ -982,6 +970,7 @@ cp if(bind(nfd, (struct sockaddr *)&a, sizeof(struct sockaddr))) { + close(nfd); syslog(LOG_ERR, _("Can't bind to port %hd/udp: %m"), myself->port); return -1; } @@ -992,6 +981,7 @@ cp if(connect(nfd, (struct sockaddr *)&a, sizeof(a)) == -1) { + close(nfd); syslog(LOG_ERR, _("Connecting to %s port %d failed: %m"), cl->hostname, cl->port); return -1; @@ -1000,6 +990,7 @@ cp flags = fcntl(nfd, F_GETFL); if(fcntl(nfd, F_SETFL, flags | O_NONBLOCK) < 0) { + close(nfd); syslog(LOG_ERR, _("This is a bug: %s:%d: %d:%m %s (%s)"), __FILE__, __LINE__, nfd, cl->name, cl->hostname); return -1; @@ -1015,15 +1006,15 @@ cp handle an incoming tcp connect call and open a connection to it. */ -conn_list_t *create_new_connection(int sfd) +connection_t *create_new_connection(int sfd) { - conn_list_t *p; + connection_t *p; struct sockaddr_in ci; int len = sizeof(ci); cp - p = new_conn_list(); + p = new_connection(); - if(getpeername(sfd, &ci, &len) < 0) + if(getpeername(sfd, (struct sockaddr *) &ci, (socklen_t *) &len) < 0) { syslog(LOG_ERR, _("System call `%s' failed: %m"), "getpeername"); @@ -1053,16 +1044,18 @@ cp */ void build_fdset(fd_set *fs) { - conn_list_t *p; + rbl_t *rbl; + connection_t *p; cp FD_ZERO(fs); - for(p = conn_list; p != NULL; p = p->next) + RBL_FOREACH(connection_tree, rbl) { + p = (connection_t *)rbl->data; if(p->status.meta) - FD_SET(p->meta_socket, fs); + FD_SET(p->meta_socket, fs); if(p->status.dataopen) - FD_SET(p->socket, fs); + FD_SET(p->socket, fs); } FD_SET(myself->meta_socket, fs); @@ -1075,7 +1068,7 @@ cp udp socket and write it to the ethertap device after being decrypted */ -int handle_incoming_vpn_data(conn_list_t *cl) +int handle_incoming_vpn_data(connection_t *cl) { vpn_packet_t pkt; int x, l = sizeof(x); @@ -1113,10 +1106,11 @@ cp terminate a connection and notify the other end before closing the sockets */ -void terminate_connection(conn_list_t *cl) +void terminate_connection(connection_t *cl) { - conn_list_t *p; - subnet_t *s; + connection_t *p; + subnet_t *subnet; + rbl_t *rbl; cp if(cl->status.remove) return; @@ -1132,26 +1126,34 @@ cp if(cl->status.meta) close(cl->meta_socket); -cp /* Find all connections that were lost because they were behind cl (the connection that was dropped). */ if(cl->status.meta) - for(p = conn_list; p != NULL; p = p->next) - if((p->nexthop == cl) && (p != cl)) - terminate_connection(p); /* Sounds like recursion, but p does not have a meta connection :) */ + RBL_FOREACH(connection_tree, rbl) + { + p = (connection_t *)rbl->data; + if(p->nexthop == cl && p != cl) + terminate_connection(p); + } /* Inform others of termination if it was still active */ if(cl->status.active) - for(p = conn_list; p != NULL; p = p->next) - if(p->status.meta && p->status.active && p!=cl) - send_del_host(p, cl); + RBL_FOREACH(connection_tree, rbl) + { + p = (connection_t *)rbl->data; + if(p->status.meta && p->status.active && p!=cl) + send_del_host(p, cl); /* Sounds like recursion, but p does not have a meta connection :) */ + } /* Remove the associated subnets */ - for(s = cl->subnets; s; s = s->next) - subnet_del(s); + RBL_FOREACH(cl->subnet_tree, rbl) + { + subnet = (subnet_t *)rbl->data; + subnet_del(subnet); + } /* Check if this was our outgoing connection */ @@ -1177,35 +1179,37 @@ cp end does not reply in time, we consider them dead and close the connection. */ -int check_dead_connections(void) +void check_dead_connections(void) { - conn_list_t *p; time_t now; + rbl_t *rbl; + connection_t *cl; cp now = time(NULL); - for(p = conn_list; p != NULL; p = p->next) + + RBL_FOREACH(connection_tree, rbl) { - if(p->status.active && p->status.meta) - { - if(p->last_ping_time + timeout < now) + cl = (connection_t *)rbl->data; + if(cl->status.active && cl->status.meta) + { + if(cl->last_ping_time + timeout < now) { - if(p->status.pinged) + if(cl->status.pinged) { if(debug_lvl >= DEBUG_PROTOCOL) syslog(LOG_INFO, _("%s (%s) didn't respond to PING"), - p->name, p->hostname); - p->status.timeout = 1; - terminate_connection(p); + cl->name, cl->hostname); + cl->status.timeout = 1; + terminate_connection(cl); } else { - send_ping(p); + send_ping(cl); } } - } + } } cp - return 0; } /* @@ -1214,7 +1218,7 @@ cp */ int handle_new_meta_connection() { - conn_list_t *ncn; + connection_t *ncn; struct sockaddr client; int nfd, len = sizeof(client); cp @@ -1232,7 +1236,7 @@ cp return 0; } - conn_list_add(ncn); + connection_add(ncn); cp return 0; } @@ -1243,12 +1247,15 @@ cp */ void check_network_activity(fd_set *f) { - conn_list_t *p; + connection_t *p; + rbl_t *rbl; cp - for(p = conn_list; p != NULL; p = p->next) + RBL_FOREACH(connection_tree, rbl) { + p = (connection_t *)rbl->data; + if(p->status.remove) - continue; + return; if(p->status.dataopen) if(FD_ISSET(p->socket, f)) @@ -1273,7 +1280,7 @@ cp return; } } - + if(FD_ISSET(myself->meta_socket, f)) handle_new_meta_connection(); cp @@ -1343,7 +1350,7 @@ cp tv.tv_sec = timeout; tv.tv_usec = 0; - prune_conn_list(); + prune_connection_tree(); build_fdset(&fset); if((r = select(FD_SETSIZE, &fset, NULL, NULL, &tv)) < 0)