X-Git-Url: http://git.meshlink.io/?a=blobdiff_plain;f=src%2Fnet_socket.c;h=730cf6b8e56f5f00ffce0fa12ec34e6a7334aedd;hb=3fba80174dbe29bcfe0d121a2a1d2e61be5ee57b;hp=2e6b068552d3838cbeb175c32f97637cf7d83fcc;hpb=a9445e38f25bd24eca289768fc46e44e36b842ac;p=meshlink diff --git a/src/net_socket.c b/src/net_socket.c index 2e6b0685..730cf6b8 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 @@ -22,10 +22,9 @@ #include "system.h" -#include "avl_tree.h" +#include "splay_tree.h" #include "conf.h" #include "connection.h" -#include "event.h" #include "logger.h" #include "meta.h" #include "net.h" @@ -34,8 +33,6 @@ #include "utils.h" #include "xalloc.h" -#include - /* Needed on Mac OS/X */ #ifndef SOL_TCP #define SOL_TCP IPPROTO_TCP @@ -72,12 +69,12 @@ static void configure_tcp(connection_t *c) { #if defined(SOL_TCP) && defined(TCP_NODELAY) option = 1; - setsockopt(c->socket, SOL_TCP, TCP_NODELAY, (void *)&option, sizeof(option)); + setsockopt(c->socket, SOL_TCP, TCP_NODELAY, (void *)&option, sizeof option); #endif #if defined(SOL_IP) && defined(IP_TOS) && defined(IPTOS_LOWDELAY) option = IPTOS_LOWDELAY; - setsockopt(c->socket, SOL_IP, IP_TOS, (void *)&option, sizeof(option)); + setsockopt(c->socket, SOL_IP, IP_TOS, (void *)&option, sizeof option); #endif } @@ -110,63 +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; @@ -180,10 +120,14 @@ 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; - setsockopt(nfd, SOL_SOCKET, SO_REUSEADDR, (void *)&option, sizeof(option)); + setsockopt(nfd, SOL_SOCKET, SO_REUSEADDR, (void *)&option, sizeof option); #if defined(SOL_IPV6) && defined(IPV6_V6ONLY) if(sa->sa.sa_family == AF_INET6) @@ -195,10 +139,10 @@ int setup_listen_socket(const sockaddr_t *sa) { #if defined(SOL_SOCKET) && defined(SO_BINDTODEVICE) struct ifreq ifr; - memset(&ifr, 0, sizeof(ifr)); + memset(&ifr, 0, sizeof ifr); strncpy(ifr.ifr_ifrn.ifrn_name, iface, IFNAMSIZ); - if(setsockopt(nfd, SOL_SOCKET, SO_BINDTODEVICE, (void *)&ifr, sizeof(ifr))) { + if(setsockopt(nfd, SOL_SOCKET, SO_BINDTODEVICE, (void *)&ifr, sizeof ifr)) { closesocket(nfd); logger(LOG_ERR, "Can't bind to interface %s: %s", iface, strerror(sockerrno)); @@ -238,6 +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); @@ -261,7 +209,7 @@ int setup_vpn_in_socket(const sockaddr_t *sa) { #endif option = 1; - setsockopt(nfd, SOL_SOCKET, SO_REUSEADDR, (void *)&option, sizeof(option)); + setsockopt(nfd, SOL_SOCKET, SO_REUSEADDR, (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)); @@ -322,19 +270,18 @@ int setup_vpn_in_socket(const sockaddr_t *sa) { return nfd; } /* int setup_vpn_in_socket */ +static void retry_outgoing_handler(int fd, short events, void *data) { + setup_outgoing_connection(data); +} + void retry_outgoing(outgoing_t *outgoing) { outgoing->timeout += 5; if(outgoing->timeout > maxtimeout) outgoing->timeout = maxtimeout; - if(outgoing->event) - event_del(outgoing->event); - outgoing->event = new_event(); - outgoing->event->handler = (event_handler_t) setup_outgoing_connection; - outgoing->event->time = now + outgoing->timeout; - outgoing->event->data = outgoing; - event_add(outgoing->event); + timeout_set(&outgoing->ev, retry_outgoing_handler, outgoing); + event_add(&outgoing->ev, &(struct timeval){outgoing->timeout, 0}); ifdebug(CONNECTIONS) logger(LOG_NOTICE, "Trying to re-establish outgoing connection in %d seconds", @@ -346,12 +293,13 @@ void finish_connecting(connection_t *c) { configure_tcp(c); - c->last_ping_time = now; + c->last_ping_time = time(NULL); + c->status.connecting = false; send_id(c); } -void do_outgoing_connection(connection_t *c) { +bool do_outgoing_connection(connection_t *c) { char *address, *port, *space; int result; @@ -365,10 +313,10 @@ begin: if(!c->outgoing->cfg) { ifdebug(CONNECTIONS) logger(LOG_ERR, "Could not set up a meta connection to %s", c->name); - c->status.remove = true; retry_outgoing(c->outgoing); c->outgoing = NULL; - return; + connection_del(c); + return false; } get_config_string(c->outgoing->cfg, &address); @@ -410,6 +358,10 @@ 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; @@ -422,7 +374,6 @@ begin: #endif bind_to_interface(c->socket); - bind_to_address(c); /* Optimize TCP settings */ @@ -435,7 +386,7 @@ begin: if(result == -1) { if(sockinprogress(sockerrno)) { c->status.connecting = true; - return; + return true; } closesocket(c->socket); @@ -447,14 +398,32 @@ begin: finish_connecting(c); - return; + return true; +} + +static void handle_meta_write(int sock, short events, void *data) { + ifdebug(META) logger(LOG_DEBUG, "handle_meta_write() called"); + + connection_t *c = data; + + 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; - outgoing->event = NULL; + if(event_initialized(&outgoing->ev)) + event_del(&outgoing->ev); n = lookup_node(outgoing->name); @@ -485,28 +454,32 @@ void setup_outgoing_connection(outgoing_t *outgoing) { } c->outgoing = outgoing; - c->last_ping_time = now; + c->last_ping_time = time(NULL); connection_add(c); - do_outgoing_connection(c); + 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); + } } /* accept a new tcp connect and create a new connection */ -bool handle_new_meta_connection(int sock) { +void handle_new_meta_connection(int sock, short events, void *data) { connection_t *c; sockaddr_t sa; int fd; - socklen_t len = sizeof(sa); + socklen_t len = sizeof sa; fd = accept(sock, &sa.sa, &len); if(fd < 0) { logger(LOG_ERR, "Accepting a new connection failed: %s", sockstrerror(sockerrno)); - return false; + return; } sockaddrunmap(&sa); @@ -521,21 +494,23 @@ bool handle_new_meta_connection(int sock) { c->address = sa; c->hostname = sockaddr2hostname(&sa); c->socket = fd; - c->last_ping_time = now; + c->last_ping_time = time(NULL); 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); + configure_tcp(c); connection_add(c); c->allow_request = ID; send_id(c); - - return true; } -void free_outgoing(outgoing_t *outgoing) { +static void free_outgoing(outgoing_t *outgoing) { if(outgoing->ai) freeaddrinfo(outgoing->ai); @@ -563,7 +538,7 @@ void try_outgoing_connections(void) { continue; } - outgoing = xmalloc_and_zero(sizeof(*outgoing)); + outgoing = xmalloc_and_zero(sizeof *outgoing); outgoing->name = name; list_insert_tail(outgoing_list, outgoing); setup_outgoing_connection(outgoing);