+++ /dev/null
-/*
- * Copyright (C) 2012 - David Goulet <dgoulet@efficios.com>
- *
- * 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 <assert.h>
-#include <limits.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <sys/stat.h>
-#include <sys/types.h>
-#include <unistd.h>
-#include <errno.h>
-
-#include <common/defaults.h>
-#include <common/error.h>
-
-#include "inet.h"
-
-/*
- * INET protocol operations.
- */
-static const struct lttcomm_proto_ops inet_ops = {
- .bind = lttcomm_bind_inet_sock,
- .close = lttcomm_close_inet_sock,
- .connect = lttcomm_connect_inet_sock,
- .accept = lttcomm_accept_inet_sock,
- .listen = lttcomm_listen_inet_sock,
- .recvmsg = lttcomm_recvmsg_inet_sock,
- .sendmsg = lttcomm_sendmsg_inet_sock,
-};
-
-/*
- * Creates an PF_INET socket.
- */
-__attribute__((visibility("hidden")))
-int lttcomm_create_inet_sock(struct lttcomm_sock *sock, int type, int proto)
-{
- int val = 1, ret;
-
- /* Create server socket */
- if ((sock->fd = socket(PF_INET, type, proto)) < 0) {
- PERROR("socket inet");
- goto error;
- }
-
- sock->ops = &inet_ops;
-
- /*
- * Set socket option to reuse the address.
- */
- ret = setsockopt(sock->fd, SOL_SOCKET, SO_REUSEADDR, &val, sizeof(int));
- if (ret < 0) {
- PERROR("setsockopt inet");
- goto error;
- }
-
- return 0;
-
-error:
- return -1;
-}
-
-/*
- * Bind socket and return.
- */
-__attribute__((visibility("hidden")))
-int lttcomm_bind_inet_sock(struct lttcomm_sock *sock)
-{
- int ret;
-
- ret = bind(sock->fd, &sock->sockaddr.addr.sin,
- sizeof(sock->sockaddr.addr.sin));
- if (ret < 0) {
- PERROR("bind inet");
- }
-
- return ret;
-}
-
-/*
- * Connect PF_INET socket.
- */
-__attribute__((visibility("hidden")))
-int lttcomm_connect_inet_sock(struct lttcomm_sock *sock)
-{
- int ret, closeret;
-
- ret = connect(sock->fd, (struct sockaddr *) &sock->sockaddr.addr.sin,
- sizeof(sock->sockaddr.addr.sin));
- if (ret < 0) {
- /*
- * Don't print message on connect error, because connect is used in
- * normal execution to detect if sessiond is alive.
- */
- goto error_connect;
- }
-
- return ret;
-
-error_connect:
- closeret = close(sock->fd);
- if (closeret) {
- PERROR("close inet");
- }
-
- return ret;
-}
-
-/*
- * Do an accept(2) on the sock and return the new lttcomm socket. The socket
- * MUST be bind(2) before.
- */
-__attribute__((visibility("hidden")))
-struct lttcomm_sock *lttcomm_accept_inet_sock(struct lttcomm_sock *sock)
-{
- int new_fd;
- socklen_t len = 0;
- struct lttcomm_sock *new_sock;
-
- if (sock->proto == LTTCOMM_SOCK_UDP) {
- /*
- * accept(2) does not exist for UDP so simply return the passed socket.
- */
- new_sock = sock;
- goto end;
- }
-
- new_sock = lttcomm_alloc_sock(sock->proto);
- if (new_sock == NULL) {
- goto error;
- }
-
- /* Blocking call */
- new_fd = accept(sock->fd, (struct sockaddr *) &new_sock->sockaddr.addr.sin,
- &len);
- if (new_fd < 0) {
- PERROR("accept inet");
- goto error;
- }
-
- new_sock->fd = new_fd;
- new_sock->ops = &inet_ops;
-
-end:
- return new_sock;
-
-error:
- free(new_sock);
- return NULL;
-}
-
-/*
- * Make the socket listen using LTTNG_SESSIOND_COMM_MAX_LISTEN.
- */
-__attribute__((visibility("hidden")))
-int lttcomm_listen_inet_sock(struct lttcomm_sock *sock, int backlog)
-{
- int ret;
-
- if (sock->proto == LTTCOMM_SOCK_UDP) {
- /* listen(2) does not exist for UDP so simply return success. */
- ret = 0;
- goto end;
- }
-
- /* Default listen backlog */
- if (backlog <= 0) {
- backlog = LTTNG_SESSIOND_COMM_MAX_LISTEN;
- }
-
- ret = listen(sock->fd, backlog);
- if (ret < 0) {
- PERROR("listen inet");
- }
-
-end:
- return ret;
-}
-
-/*
- * Receive data of size len in put that data into the buf param. Using recvmsg
- * API.
- *
- * Return the size of received data.
- */
-__attribute__((visibility("hidden")))
-ssize_t lttcomm_recvmsg_inet_sock(struct lttcomm_sock *sock, void *buf,
- size_t len, int flags)
-{
- struct msghdr msg;
- struct iovec iov[1];
- ssize_t ret = -1;
-
- memset(&msg, 0, sizeof(msg));
-
- iov[0].iov_base = buf;
- iov[0].iov_len = len;
- msg.msg_iov = iov;
- msg.msg_iovlen = 1;
-
- msg.msg_name = (struct sockaddr *) &sock->sockaddr.addr.sin;
- msg.msg_namelen = sizeof(sock->sockaddr.addr.sin);
-
- if (flags == 0) {
- flags = MSG_WAITALL;
- }
-
- do {
- ret = recvmsg(sock->fd, &msg, flags);
- } while (ret < 0 && errno == EINTR);
- if (ret < 0) {
- PERROR("recvmsg inet");
- }
-
- return ret;
-}
-
-/*
- * Send buf data of size len. Using sendmsg API.
- *
- * Return the size of sent data.
- */
-__attribute__((visibility("hidden")))
-ssize_t lttcomm_sendmsg_inet_sock(struct lttcomm_sock *sock, void *buf,
- size_t len, int flags)
-{
- struct msghdr msg;
- struct iovec iov[1];
- ssize_t ret = -1;
-
- memset(&msg, 0, sizeof(msg));
-
- iov[0].iov_base = buf;
- iov[0].iov_len = len;
- msg.msg_iov = iov;
- msg.msg_iovlen = 1;
-
- switch (sock->proto) {
- case LTTCOMM_SOCK_UDP:
- msg.msg_name = (struct sockaddr *) &sock->sockaddr.addr.sin;
- msg.msg_namelen = sizeof(sock->sockaddr.addr.sin);
- break;
- default:
- break;
- }
-
- do {
- ret = sendmsg(sock->fd, &msg, flags);
- } while (ret < 0 && errno == EINTR);
- if (ret < 0) {
- /*
- * Only warn about EPIPE when quiet mode is deactivated.
- * We consider EPIPE as expected.
- */
- if (errno != EPIPE || !lttng_opt_quiet) {
- PERROR("sendmsg inet");
- }
- }
-
- return ret;
-}
-
-/*
- * Shutdown cleanly and close.
- */
-__attribute__((visibility("hidden")))
-int lttcomm_close_inet_sock(struct lttcomm_sock *sock)
-{
- int ret;
-
- /* Don't try to close an invalid marked socket */
- if (sock->fd == -1) {
- return 0;
- }
-
- ret = close(sock->fd);
- if (ret) {
- PERROR("close inet");
- }
-
- /* Mark socket */
- sock->fd = -1;
-
- return ret;
-}
projects / lttng-tools.git / blobdiff