X-Git-Url: https://git.liburcu.org/?a=blobdiff_plain;f=src%2Fcommon%2Fsessiond-comm%2Fsessiond-comm.c;h=d64374ea9e30bd330c73763b80260b0359bb89cf;hb=fe7bf56464d7747362e1bde77c2769a62c81ac4c;hp=9a13f41488a9ef6deb61323cf403f7ed8688da1a;hpb=618a6a28c0956fc6829c165a39ffec97f239096c;p=lttng-tools.git diff --git a/src/common/sessiond-comm/sessiond-comm.c b/src/common/sessiond-comm/sessiond-comm.c index 9a13f4148..d64374ea9 100644 --- a/src/common/sessiond-comm/sessiond-comm.c +++ b/src/common/sessiond-comm/sessiond-comm.c @@ -1,22 +1,13 @@ /* - * Copyright (C) 2011 - David Goulet - * Mathieu Desnoyers + * Copyright (C) 2011 EfficiOS Inc. + * Copyright (C) 2011 Mathieu Desnoyers + * + * SPDX-License-Identifier: GPL-2.0-only * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License, version 2 only, - * as published by the Free Software Foundation. - * - * This program is distributed in the hope that it will be useful, but WITHOUT - * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or - * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for - * more details. - * - * You should have received a copy of the GNU General Public License along - * with this program; if not, write to the Free Software Foundation, Inc., - * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. */ -#define _GNU_SOURCE +#include +#define _LGPL_SOURCE #include #include #include @@ -25,19 +16,22 @@ #include #include #include -#include +#include #include +#include #include "sessiond-comm.h" /* For Unix socket */ -#include "unix.h" +#include /* For Inet socket */ #include "inet.h" /* For Inet6 socket */ #include "inet6.h" +#define NETWORK_TIMEOUT_ENV "LTTNG_NETWORK_SOCKET_TIMEOUT" + static struct lttcomm_net_family net_families[] = { { LTTCOMM_INET, lttcomm_create_inet_sock }, { LTTCOMM_INET6, lttcomm_create_inet6_sock }, @@ -70,6 +64,8 @@ static const char *lttcomm_readable_code[] = { [ LTTCOMM_ERR_INDEX(LTTCOMM_NR) ] = "Unknown error code" }; +static unsigned long network_timeout; + /* * Return ptr to string representing a human readable error code from the * lttcomm_return_code enum. @@ -368,3 +364,186 @@ error_free: error: return NULL; } + +/* + * Set socket receiving timeout. + */ +LTTNG_HIDDEN +int lttcomm_setsockopt_rcv_timeout(int sock, unsigned int msec) +{ + int ret; + struct timeval tv; + + tv.tv_sec = msec / 1000; + tv.tv_usec = (msec % 1000) * 1000; + + ret = setsockopt(sock, SOL_SOCKET, SO_RCVTIMEO, &tv, sizeof(tv)); + if (ret < 0) { + PERROR("setsockopt SO_RCVTIMEO"); + } + + return ret; +} + +/* + * Set socket sending timeout. + */ +LTTNG_HIDDEN +int lttcomm_setsockopt_snd_timeout(int sock, unsigned int msec) +{ + int ret; + struct timeval tv; + + tv.tv_sec = msec / 1000; + tv.tv_usec = (msec % 1000) * 1000; + + ret = setsockopt(sock, SOL_SOCKET, SO_SNDTIMEO, &tv, sizeof(tv)); + if (ret < 0) { + PERROR("setsockopt SO_SNDTIMEO"); + } + + return ret; +} + +LTTNG_HIDDEN +int lttcomm_sock_get_port(const struct lttcomm_sock *sock, uint16_t *port) +{ + assert(sock); + assert(port); + assert(sock->sockaddr.type == LTTCOMM_INET || + sock->sockaddr.type == LTTCOMM_INET6); + assert(sock->proto == LTTCOMM_SOCK_TCP || + sock->proto == LTTCOMM_SOCK_UDP); + + switch (sock->sockaddr.type) { + case LTTCOMM_INET: + *port = ntohs(sock->sockaddr.addr.sin.sin_port); + break; + case LTTCOMM_INET6: + *port = ntohs(sock->sockaddr.addr.sin6.sin6_port); + break; + default: + abort(); + } + + return 0; +} + +LTTNG_HIDDEN +int lttcomm_sock_set_port(struct lttcomm_sock *sock, uint16_t port) +{ + assert(sock); + assert(sock->sockaddr.type == LTTCOMM_INET || + sock->sockaddr.type == LTTCOMM_INET6); + assert(sock->proto == LTTCOMM_SOCK_TCP || + sock->proto == LTTCOMM_SOCK_UDP); + + switch (sock->sockaddr.type) { + case LTTCOMM_INET: + sock->sockaddr.addr.sin.sin_port = htons(port); + break; + case LTTCOMM_INET6: + sock->sockaddr.addr.sin6.sin6_port = htons(port); + break; + default: + abort(); + } + + return 0; +} + +LTTNG_HIDDEN +void lttcomm_init(void) +{ + const char *env; + + env = getenv(NETWORK_TIMEOUT_ENV); + if (env) { + long timeout; + + errno = 0; + timeout = strtol(env, NULL, 0); + if (errno != 0 || timeout < -1L) { + PERROR("Network timeout"); + } else { + if (timeout > 0) { + network_timeout = timeout; + } + } + } +} + +LTTNG_HIDDEN +unsigned long lttcomm_get_network_timeout(void) +{ + return network_timeout; +} + +/* + * Only valid for an ipv4 and ipv6 bound socket that is already connected to its + * peer. + */ +int lttcomm_populate_sock_from_open_socket( + struct lttcomm_sock *sock, + int fd, + enum lttcomm_sock_proto protocol) +{ + int ret = 0; + socklen_t storage_len; + struct sockaddr_storage storage = { 0 }; + + assert(sock); + assert(fd >= 0); + + sock->proto = protocol; + + storage_len = sizeof(storage); + ret = getpeername(fd, (struct sockaddr *) &storage, + &storage_len); + if (ret) { + ERR("Failed to get peer info for socket %d (errno: %d)", fd, + errno); + ret = -1; + goto end; + } + + if (storage_len > sizeof(storage)) { + ERR("Failed to get peer info for socket %d: storage size is too small", fd); + ret = -1; + goto end; + } + + switch (storage.ss_family) { + case AF_INET: + sock->sockaddr.type = LTTCOMM_INET; + memcpy(&sock->sockaddr.addr, &storage, + sizeof(struct sockaddr_in)); + break; + case AF_INET6: + sock->sockaddr.type = LTTCOMM_INET6; + memcpy(&sock->sockaddr.addr, &storage, + sizeof(struct sockaddr_in6)); + break; + default: + abort(); + break; + } + + /* Create a valid socket object with a temporary fd. */ + ret = lttcomm_create_sock(sock); + if (ret < 0) { + ERR("Failed to create temporary socket object"); + ret = -1; + goto end; + } + + /* Substitute the fd. */ + if (sock->ops->close(sock)) { + ret = -1; + goto end; + } + sock->fd = fd; + +end: + return ret; +}