X-Git-Url: https://tinc-vpn.org/git/browse?a=blobdiff_plain;f=src%2Fnet_socket.c;h=282066976b271c23e827e7f7149daa2486bf3917;hb=f5dc136cfd7a3a195b75f7174722734e25f30fd9;hp=44d7f77159c5d586ceb8fdb62438e5f6c5593538;hpb=a22041922f160667573e9a5ae3f4195e1668906a;p=tinc diff --git a/src/net_socket.c b/src/net_socket.c index 44d7f771..28206697 100644 --- a/src/net_socket.c +++ b/src/net_socket.c @@ -1,7 +1,7 @@ /* net_socket.c -- Handle various kinds of sockets. Copyright (C) 1998-2005 Ivo Timmermans, - 2000-2010 Guus Sliepen + 2000-2012 Guus Sliepen 2006 Scott Lamb 2009 Florian Forster @@ -33,8 +33,6 @@ #include "utils.h" #include "xalloc.h" -#include - /* Needed on Mac OS/X */ #ifndef SOL_TCP #define SOL_TCP IPPROTO_TCP @@ -43,6 +41,8 @@ int addressfamily = AF_UNSPEC; int maxtimeout = 900; int seconds_till_retry = 5; +int udp_rcvbuf = 0; +int udp_sndbuf = 0; listen_socket_t listen_socket[MAXSOCKETS]; int listen_sockets; @@ -107,63 +107,6 @@ static bool bind_to_interface(int sd) { return true; } -static bool bind_to_address(connection_t *c) { - char *node; - struct addrinfo *ai_list; - struct addrinfo *ai_ptr; - struct addrinfo ai_hints; - int status; - - assert(c != NULL); - assert(c->socket >= 0); - - node = NULL; - if(!get_config_string(lookup_config(config_tree, "BindToAddress"), - &node)) - return true; - - assert(node != NULL); - - memset(&ai_hints, 0, sizeof(ai_hints)); - ai_hints.ai_family = c->address.sa.sa_family; - /* We're called from `do_outgoing_connection' only. */ - ai_hints.ai_socktype = SOCK_STREAM; - ai_hints.ai_protocol = IPPROTO_TCP; - - ai_list = NULL; - - status = getaddrinfo(node, /* service = */ NULL, - &ai_hints, &ai_list); - if(status) { - free(node); - logger(LOG_WARNING, "Error looking up %s port %s: %s", - node, "any", gai_strerror(status)); - return false; - } - assert(ai_list != NULL); - - status = -1; - for(ai_ptr = ai_list; ai_ptr != NULL; ai_ptr = ai_ptr->ai_next) { - status = bind(c->socket, - ai_list->ai_addr, ai_list->ai_addrlen); - if(!status) - break; - } - - - if(status) { - logger(LOG_ERR, "Can't bind to %s/tcp: %s", node, sockstrerror(sockerrno)); - } else ifdebug(CONNECTIONS) { - logger(LOG_DEBUG, "Successfully bound outgoing " - "TCP socket to %s", node); - } - - free(node); - freeaddrinfo(ai_list); - - return status ? false : true; -} - int setup_listen_socket(const sockaddr_t *sa) { int nfd; char *addrstr; @@ -177,6 +120,10 @@ int setup_listen_socket(const sockaddr_t *sa) { return -1; } +#ifdef FD_CLOEXEC + fcntl(nfd, F_SETFD, FD_CLOEXEC); +#endif + /* Optimize TCP settings */ option = 1; @@ -235,6 +182,10 @@ int setup_vpn_in_socket(const sockaddr_t *sa) { return -1; } +#ifdef FD_CLOEXEC + fcntl(nfd, F_SETFD, FD_CLOEXEC); +#endif + #ifdef O_NONBLOCK { int flags = fcntl(nfd, F_GETFL); @@ -259,6 +210,13 @@ int setup_vpn_in_socket(const sockaddr_t *sa) { option = 1; setsockopt(nfd, SOL_SOCKET, SO_REUSEADDR, (void *)&option, sizeof option); + setsockopt(nfd, SOL_SOCKET, SO_BROADCAST, (void *)&option, sizeof option); + + if(udp_rcvbuf && setsockopt(nfd, SOL_SOCKET, SO_RCVBUF, (void *)&udp_rcvbuf, sizeof(udp_rcvbuf))) + logger(LOG_WARNING, "Can't set UDP SO_RCVBUF to %i: %s", udp_rcvbuf, strerror(errno)); + + if(udp_sndbuf && setsockopt(nfd, SOL_SOCKET, SO_SNDBUF, (void *)&udp_sndbuf, sizeof(udp_sndbuf))) + logger(LOG_WARNING, "Can't set UDP SO_SNDBUF to %i: %s", udp_sndbuf, strerror(errno)); #if defined(IPPROTO_IPV6) && defined(IPV6_V6ONLY) if(sa->sa.sa_family == AF_INET6) @@ -342,7 +300,7 @@ void finish_connecting(connection_t *c) { send_id(c); } -void do_outgoing_connection(connection_t *c) { +bool do_outgoing_connection(connection_t *c) { char *address, *port, *space; int result; @@ -359,7 +317,7 @@ begin: retry_outgoing(c->outgoing); c->outgoing = NULL; connection_del(c); - return; + return false; } get_config_string(c->outgoing->cfg, &address); @@ -401,6 +359,10 @@ begin: c->socket = socket(c->address.sa.sa_family, SOCK_STREAM, IPPROTO_TCP); +#ifdef FD_CLOEXEC + fcntl(c->socket, F_SETFD, FD_CLOEXEC); +#endif + if(c->socket == -1) { ifdebug(CONNECTIONS) logger(LOG_ERR, "Creating socket for %s failed: %s", c->hostname, sockstrerror(sockerrno)); goto begin; @@ -413,7 +375,6 @@ begin: #endif bind_to_interface(c->socket); - bind_to_address(c); /* Optimize TCP settings */ @@ -426,7 +387,7 @@ begin: if(result == -1) { if(sockinprogress(sockerrno)) { c->status.connecting = true; - return; + return true; } closesocket(c->socket); @@ -438,29 +399,32 @@ begin: finish_connecting(c); - return; -} - -void handle_meta_read(struct bufferevent *event, void *data) { - logger(LOG_ERR, "handle_meta_read() called"); - abort(); + return true; } -void handle_meta_write(struct bufferevent *event, void *data) { +static void handle_meta_write(int sock, short events, void *data) { ifdebug(META) logger(LOG_DEBUG, "handle_meta_write() called"); -} -void handle_meta_connection_error(struct bufferevent *event, short what, void *data) { connection_t *c = data; - logger(LOG_ERR, "handle_meta_connection_error() called: %d: %s", what, strerror(errno)); - terminate_connection(c, c->status.active); + + ssize_t outlen = send(c->socket, c->outbuf.data + c->outbuf.offset, c->outbuf.len - c->outbuf.offset, 0); + if(outlen <= 0) { + logger(LOG_ERR, "Onoes, outlen = %d (%s)", (int)outlen, strerror(errno)); + terminate_connection(c, c->status.active); + return; + } + + buffer_read(&c->outbuf, outlen); + if(!c->outbuf.len && event_initialized(&c->outevent)) + event_del(&c->outevent); } void setup_outgoing_connection(outgoing_t *outgoing) { connection_t *c; node_t *n; - event_del(&outgoing->ev); + if(event_initialized(&outgoing->ev)) + event_del(&outgoing->ev); n = lookup_node(outgoing->name); @@ -495,16 +459,11 @@ void setup_outgoing_connection(outgoing_t *outgoing) { connection_add(c); - do_outgoing_connection(c); - - event_set(&c->inevent, c->socket, EV_READ | EV_PERSIST, handle_meta_connection_data, c); - event_add(&c->inevent, NULL); - c->buffer = bufferevent_new(c->socket, handle_meta_read, handle_meta_write, handle_meta_connection_error, c); - if(!c->buffer) { - logger(LOG_ERR, "bufferevent_new() failed: %s", strerror(errno)); - abort(); + if (do_outgoing_connection(c)) { + event_set(&c->inevent, c->socket, EV_READ | EV_PERSIST, handle_meta_connection_data, c); + event_set(&c->outevent, c->socket, EV_WRITE | EV_PERSIST, handle_meta_write, c); + event_add(&c->inevent, NULL); } - bufferevent_disable(c->buffer, EV_READ); } /* @@ -541,13 +500,8 @@ void handle_new_meta_connection(int sock, short events, void *data) { ifdebug(CONNECTIONS) logger(LOG_NOTICE, "Connection from %s", c->hostname); event_set(&c->inevent, c->socket, EV_READ | EV_PERSIST, handle_meta_connection_data, c); + event_set(&c->outevent, c->socket, EV_WRITE | EV_PERSIST, handle_meta_write, c); event_add(&c->inevent, NULL); - c->buffer = bufferevent_new(c->socket, NULL, handle_meta_write, handle_meta_connection_error, c); - if(!c->buffer) { - logger(LOG_ERR, "bufferevent_new() failed: %s", strerror(errno)); - abort(); - } - bufferevent_disable(c->buffer, EV_READ); configure_tcp(c); @@ -557,7 +511,7 @@ void handle_new_meta_connection(int sock, short events, void *data) { send_id(c); } -void free_outgoing(outgoing_t *outgoing) { +static void free_outgoing(outgoing_t *outgoing) { if(outgoing->ai) freeaddrinfo(outgoing->ai);