* Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca>
* Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
*
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the Free
- * Software Foundation; only version 2 of the License.
+ * 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., 59 Temple
- * Place - Suite 330, Boston, MA 02111-1307, USA.
+ * 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
+#define _LGPL_SOURCE
#include <assert.h>
#include <limits.h>
#include <stdio.h>
#include <unistd.h>
#include <errno.h>
-#include <common/defaults.h>
+#include <common/common.h>
#include "sessiond-comm.h"
+/* For Unix socket */
+#include <common/unix.h>
+/* 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 },
+};
+
/*
* Human readable error message.
*/
static const char *lttcomm_readable_code[] = {
- [ LTTCOMM_ERR_INDEX(LTTCOMM_OK) ] = "Success",
- [ LTTCOMM_ERR_INDEX(LTTCOMM_ERR) ] = "Unknown error",
- [ LTTCOMM_ERR_INDEX(LTTCOMM_UND) ] = "Undefined command",
- [ LTTCOMM_ERR_INDEX(LTTCOMM_NOT_IMPLEMENTED) ] = "Not implemented",
- [ LTTCOMM_ERR_INDEX(LTTCOMM_UNKNOWN_DOMAIN) ] = "Unknown tracing domain",
- [ LTTCOMM_ERR_INDEX(LTTCOMM_NO_SESSION) ] = "No session found",
- [ LTTCOMM_ERR_INDEX(LTTCOMM_LIST_FAIL) ] = "Unable to list traceable apps",
- [ LTTCOMM_ERR_INDEX(LTTCOMM_NO_APPS) ] = "No traceable apps found",
- [ LTTCOMM_ERR_INDEX(LTTCOMM_SESS_NOT_FOUND) ] = "Session name not found",
- [ LTTCOMM_ERR_INDEX(LTTCOMM_NO_TRACE) ] = "No trace found",
- [ LTTCOMM_ERR_INDEX(LTTCOMM_FATAL) ] = "Fatal error of the session daemon",
- [ LTTCOMM_ERR_INDEX(LTTCOMM_CREATE_DIR_FAIL) ] = "Create directory failed",
- [ LTTCOMM_ERR_INDEX(LTTCOMM_START_FAIL) ] = "Start trace failed",
- [ LTTCOMM_ERR_INDEX(LTTCOMM_STOP_FAIL) ] = "Stop trace failed",
- [ LTTCOMM_ERR_INDEX(LTTCOMM_NO_TRACEABLE) ] = "App is not traceable",
- [ LTTCOMM_ERR_INDEX(LTTCOMM_SELECT_SESS) ] = "A session MUST be selected",
- [ LTTCOMM_ERR_INDEX(LTTCOMM_EXIST_SESS) ] = "Session name already exist",
- [ LTTCOMM_ERR_INDEX(LTTCOMM_CONNECT_FAIL) ] = "Unable to connect to Unix socket",
- [ LTTCOMM_ERR_INDEX(LTTCOMM_APP_NOT_FOUND) ] = "Application not found",
- [ LTTCOMM_ERR_INDEX(LTTCOMM_EPERM) ] = "Permission denied",
- [ LTTCOMM_ERR_INDEX(LTTCOMM_KERN_NA) ] = "Kernel tracer not available",
- [ LTTCOMM_ERR_INDEX(LTTCOMM_KERN_VERSION) ] = "Kernel tracer version is not compatible",
- [ LTTCOMM_ERR_INDEX(LTTCOMM_KERN_EVENT_EXIST) ] = "Kernel event already exists",
- [ LTTCOMM_ERR_INDEX(LTTCOMM_KERN_SESS_FAIL) ] = "Kernel create session failed",
- [ LTTCOMM_ERR_INDEX(LTTCOMM_KERN_CHAN_FAIL) ] = "Kernel create channel failed",
- [ LTTCOMM_ERR_INDEX(LTTCOMM_KERN_CHAN_NOT_FOUND) ] = "Kernel channel not found",
- [ LTTCOMM_ERR_INDEX(LTTCOMM_KERN_CHAN_DISABLE_FAIL) ] = "Disable kernel channel failed",
- [ LTTCOMM_ERR_INDEX(LTTCOMM_KERN_CHAN_ENABLE_FAIL) ] = "Enable kernel channel failed",
- [ LTTCOMM_ERR_INDEX(LTTCOMM_KERN_CONTEXT_FAIL) ] = "Add kernel context failed",
- [ LTTCOMM_ERR_INDEX(LTTCOMM_KERN_ENABLE_FAIL) ] = "Enable kernel event failed",
- [ LTTCOMM_ERR_INDEX(LTTCOMM_KERN_DISABLE_FAIL) ] = "Disable kernel event failed",
- [ LTTCOMM_ERR_INDEX(LTTCOMM_KERN_META_FAIL) ] = "Opening metadata failed",
- [ LTTCOMM_ERR_INDEX(LTTCOMM_KERN_START_FAIL) ] = "Starting kernel trace failed",
- [ LTTCOMM_ERR_INDEX(LTTCOMM_KERN_STOP_FAIL) ] = "Stoping kernel trace failed",
- [ LTTCOMM_ERR_INDEX(LTTCOMM_KERN_CONSUMER_FAIL) ] = "Kernel consumer start failed",
- [ LTTCOMM_ERR_INDEX(LTTCOMM_KERN_STREAM_FAIL) ] = "Kernel create stream failed",
- [ LTTCOMM_ERR_INDEX(LTTCOMM_KERN_DIR_FAIL) ] = "Kernel trace directory creation failed",
- [ LTTCOMM_ERR_INDEX(LTTCOMM_KERN_DIR_EXIST) ] = "Kernel trace directory already exist",
- [ LTTCOMM_ERR_INDEX(LTTCOMM_KERN_NO_SESSION) ] = "No kernel session found",
- [ LTTCOMM_ERR_INDEX(LTTCOMM_KERN_LIST_FAIL) ] = "Listing kernel events failed",
- [ LTTCOMM_ERR_INDEX(LTTCOMM_UST_CALIBRATE_FAIL) ] = "UST calibration failed",
- [ LTTCOMM_ERR_INDEX(LTTCOMM_UST_VERSION) ] = "UST tracer version is not compatible",
- [ LTTCOMM_ERR_INDEX(LTTCOMM_UST_SESS_FAIL) ] = "UST create session failed",
- [ LTTCOMM_ERR_INDEX(LTTCOMM_UST_CHAN_FAIL) ] = "UST create channel failed",
- [ LTTCOMM_ERR_INDEX(LTTCOMM_UST_CHAN_EXIST) ] = "UST channel already exist",
- [ LTTCOMM_ERR_INDEX(LTTCOMM_UST_CHAN_NOT_FOUND) ] = "UST channel not found",
- [ LTTCOMM_ERR_INDEX(LTTCOMM_UST_CHAN_DISABLE_FAIL) ] = "Disable UST channel failed",
- [ LTTCOMM_ERR_INDEX(LTTCOMM_UST_CHAN_ENABLE_FAIL) ] = "Enable UST channel failed",
- [ LTTCOMM_ERR_INDEX(LTTCOMM_UST_CONTEXT_FAIL) ] = "Add UST context failed",
- [ LTTCOMM_ERR_INDEX(LTTCOMM_UST_ENABLE_FAIL) ] = "Enable UST event failed",
- [ LTTCOMM_ERR_INDEX(LTTCOMM_UST_DISABLE_FAIL) ] = "Disable UST event failed",
- [ LTTCOMM_ERR_INDEX(LTTCOMM_UST_META_FAIL) ] = "Opening metadata failed",
- [ LTTCOMM_ERR_INDEX(LTTCOMM_UST_START_FAIL) ] = "Starting UST trace failed",
- [ LTTCOMM_ERR_INDEX(LTTCOMM_UST_STOP_FAIL) ] = "Stoping UST trace failed",
- [ LTTCOMM_ERR_INDEX(LTTCOMM_UST_CONSUMER64_FAIL) ] = "64-bit UST consumer start failed",
- [ LTTCOMM_ERR_INDEX(LTTCOMM_UST_CONSUMER32_FAIL) ] = "32-bit UST consumer start failed",
- [ LTTCOMM_ERR_INDEX(LTTCOMM_UST_STREAM_FAIL) ] = "UST create stream failed",
- [ LTTCOMM_ERR_INDEX(LTTCOMM_UST_DIR_FAIL) ] = "UST trace directory creation failed",
- [ LTTCOMM_ERR_INDEX(LTTCOMM_UST_DIR_EXIST) ] = "UST trace directory already exist",
- [ LTTCOMM_ERR_INDEX(LTTCOMM_UST_NO_SESSION) ] = "No UST session found",
- [ LTTCOMM_ERR_INDEX(LTTCOMM_UST_LIST_FAIL) ] = "Listing UST events failed",
- [ LTTCOMM_ERR_INDEX(LTTCOMM_UST_EVENT_EXIST) ] = "UST event already exist",
- [ LTTCOMM_ERR_INDEX(LTTCOMM_UST_EVENT_NOT_FOUND)] = "UST event not found",
- [ LTTCOMM_ERR_INDEX(LTTCOMM_UST_CONTEXT_EXIST)] = "UST context already exist",
- [ LTTCOMM_ERR_INDEX(LTTCOMM_UST_CONTEXT_INVAL)] = "UST invalid context",
- [ LTTCOMM_ERR_INDEX(CONSUMERD_COMMAND_SOCK_READY) ] = "consumerd command socket ready",
- [ LTTCOMM_ERR_INDEX(CONSUMERD_SUCCESS_RECV_FD) ] = "consumerd success on receiving fds",
- [ LTTCOMM_ERR_INDEX(CONSUMERD_ERROR_RECV_FD) ] = "consumerd error on receiving fds",
- [ LTTCOMM_ERR_INDEX(CONSUMERD_ERROR_RECV_CMD) ] = "consumerd error on receiving command",
- [ LTTCOMM_ERR_INDEX(CONSUMERD_POLL_ERROR) ] = "consumerd error in polling thread",
- [ LTTCOMM_ERR_INDEX(CONSUMERD_POLL_NVAL) ] = "consumerd polling on closed fd",
- [ LTTCOMM_ERR_INDEX(CONSUMERD_POLL_HUP) ] = "consumerd all fd hung up",
- [ LTTCOMM_ERR_INDEX(CONSUMERD_EXIT_SUCCESS) ] = "consumerd exiting normally",
- [ LTTCOMM_ERR_INDEX(CONSUMERD_EXIT_FAILURE) ] = "consumerd exiting on error",
- [ LTTCOMM_ERR_INDEX(CONSUMERD_OUTFD_ERROR) ] = "consumerd error opening the tracefile",
- [ LTTCOMM_ERR_INDEX(CONSUMERD_SPLICE_EBADF) ] = "consumerd splice EBADF",
- [ LTTCOMM_ERR_INDEX(CONSUMERD_SPLICE_EINVAL) ] = "consumerd splice EINVAL",
- [ LTTCOMM_ERR_INDEX(CONSUMERD_SPLICE_ENOMEM) ] = "consumerd splice ENOMEM",
- [ LTTCOMM_ERR_INDEX(CONSUMERD_SPLICE_ESPIPE) ] = "consumerd splice ESPIPE",
- [ LTTCOMM_ERR_INDEX(LTTCOMM_NO_EVENT) ] = "Event not found",
+ [ LTTCOMM_ERR_INDEX(LTTCOMM_CONSUMERD_COMMAND_SOCK_READY) ] = "consumerd command socket ready",
+ [ LTTCOMM_ERR_INDEX(LTTCOMM_CONSUMERD_SUCCESS_RECV_FD) ] = "consumerd success on receiving fds",
+ [ LTTCOMM_ERR_INDEX(LTTCOMM_CONSUMERD_ERROR_RECV_FD) ] = "consumerd error on receiving fds",
+ [ LTTCOMM_ERR_INDEX(LTTCOMM_CONSUMERD_ERROR_RECV_CMD) ] = "consumerd error on receiving command",
+ [ LTTCOMM_ERR_INDEX(LTTCOMM_CONSUMERD_POLL_ERROR) ] = "consumerd error in polling thread",
+ [ LTTCOMM_ERR_INDEX(LTTCOMM_CONSUMERD_POLL_NVAL) ] = "consumerd polling on closed fd",
+ [ LTTCOMM_ERR_INDEX(LTTCOMM_CONSUMERD_POLL_HUP) ] = "consumerd all fd hung up",
+ [ LTTCOMM_ERR_INDEX(LTTCOMM_CONSUMERD_EXIT_SUCCESS) ] = "consumerd exiting normally",
+ [ LTTCOMM_ERR_INDEX(LTTCOMM_CONSUMERD_EXIT_FAILURE) ] = "consumerd exiting on error",
+ [ LTTCOMM_ERR_INDEX(LTTCOMM_CONSUMERD_OUTFD_ERROR) ] = "consumerd error opening the tracefile",
+ [ LTTCOMM_ERR_INDEX(LTTCOMM_CONSUMERD_SPLICE_EBADF) ] = "consumerd splice EBADF",
+ [ LTTCOMM_ERR_INDEX(LTTCOMM_CONSUMERD_SPLICE_EINVAL) ] = "consumerd splice EINVAL",
+ [ LTTCOMM_ERR_INDEX(LTTCOMM_CONSUMERD_SPLICE_ENOMEM) ] = "consumerd splice ENOMEM",
+ [ LTTCOMM_ERR_INDEX(LTTCOMM_CONSUMERD_SPLICE_ESPIPE) ] = "consumerd splice ESPIPE",
+ [ LTTCOMM_ERR_INDEX(LTTCOMM_CONSUMERD_ENOMEM) ] = "Consumer is out of memory",
+ [ LTTCOMM_ERR_INDEX(LTTCOMM_CONSUMERD_ERROR_METADATA) ] = "Error with metadata",
+ [ LTTCOMM_ERR_INDEX(LTTCOMM_CONSUMERD_FATAL) ] = "Fatal error",
+ [ LTTCOMM_ERR_INDEX(LTTCOMM_CONSUMERD_RELAYD_FAIL) ] = "Error on remote relayd",
+
+ /* Last element */
+ [ 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.
*
* These code MUST be negative in other to treat that as an error value.
*/
+LTTNG_HIDDEN
const char *lttcomm_get_readable_code(enum lttcomm_return_code code)
{
- int tmp_code = -code;
+ code = -code;
- if (tmp_code >= LTTCOMM_OK && tmp_code < LTTCOMM_NR) {
- return lttcomm_readable_code[LTTCOMM_ERR_INDEX(tmp_code)];
+ if (code < LTTCOMM_CONSUMERD_COMMAND_SOCK_READY || code > LTTCOMM_NR) {
+ code = LTTCOMM_NR;
}
- return "Unknown error code";
+ return lttcomm_readable_code[LTTCOMM_ERR_INDEX(code)];
}
/*
- * Connect to unix socket using the path name.
+ * Create socket from an already allocated lttcomm socket structure and init
+ * sockaddr in the lttcomm sock.
*/
-int lttcomm_connect_unix_sock(const char *pathname)
+LTTNG_HIDDEN
+int lttcomm_create_sock(struct lttcomm_sock *sock)
{
- struct sockaddr_un sun;
- int fd;
- int ret;
+ int ret, _sock_type, _sock_proto, domain;
- fd = socket(PF_UNIX, SOCK_STREAM, 0);
- if (fd < 0) {
- perror("socket");
- ret = fd;
+ assert(sock);
+
+ domain = sock->sockaddr.type;
+ if (domain != LTTCOMM_INET && domain != LTTCOMM_INET6) {
+ ERR("Create socket of unknown domain %d", domain);
+ ret = -1;
goto error;
}
- memset(&sun, 0, sizeof(sun));
- sun.sun_family = AF_UNIX;
- strncpy(sun.sun_path, pathname, sizeof(sun.sun_path));
- sun.sun_path[sizeof(sun.sun_path) - 1] = '\0';
+ switch (sock->proto) {
+ case LTTCOMM_SOCK_UDP:
+ _sock_type = SOCK_DGRAM;
+ _sock_proto = IPPROTO_UDP;
+ break;
+ case LTTCOMM_SOCK_TCP:
+ _sock_type = SOCK_STREAM;
+ _sock_proto = IPPROTO_TCP;
+ break;
+ default:
+ ret = -1;
+ goto error;
+ }
- ret = connect(fd, (struct sockaddr *) &sun, sizeof(sun));
+ ret = net_families[domain].create(sock, _sock_type, _sock_proto);
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;
+ goto error;
}
- return fd;
-
-error_connect:
- close(fd);
error:
return ret;
}
/*
- * Do an accept(2) on the sock and return the new file descriptor. The socket
- * MUST be bind(2) before.
+ * Return allocated lttcomm socket structure.
*/
-int lttcomm_accept_unix_sock(int sock)
+LTTNG_HIDDEN
+struct lttcomm_sock *lttcomm_alloc_sock(enum lttcomm_sock_proto proto)
{
- int new_fd;
- struct sockaddr_un sun;
- socklen_t len = 0;
-
- /* Blocking call */
- new_fd = accept(sock, (struct sockaddr *) &sun, &len);
- if (new_fd < 0) {
- perror("accept");
+ struct lttcomm_sock *sock;
+
+ sock = zmalloc(sizeof(struct lttcomm_sock));
+ if (sock == NULL) {
+ PERROR("zmalloc create sock");
+ goto end;
}
- return new_fd;
+ sock->proto = proto;
+ sock->fd = -1;
+
+end:
+ return sock;
}
/*
- * Creates a AF_UNIX local socket using pathname bind the socket upon creation
- * and return the fd.
+ * Return an allocated lttcomm socket structure and copy src content into
+ * the newly created socket.
+ *
+ * This is mostly useful when lttcomm_sock are passed between process where the
+ * fd and ops have to be changed within the correct address space.
*/
-int lttcomm_create_unix_sock(const char *pathname)
+LTTNG_HIDDEN
+struct lttcomm_sock *lttcomm_alloc_copy_sock(struct lttcomm_sock *src)
{
- struct sockaddr_un sun;
- int fd;
- int ret = -1;
-
- /* Create server socket */
- if ((fd = socket(PF_UNIX, SOCK_STREAM, 0)) < 0) {
- perror("socket");
- goto error;
- }
+ struct lttcomm_sock *sock;
- memset(&sun, 0, sizeof(sun));
- sun.sun_family = AF_UNIX;
- strncpy(sun.sun_path, pathname, sizeof(sun.sun_path));
- sun.sun_path[sizeof(sun.sun_path) - 1] = '\0';
+ /* Safety net */
+ assert(src);
- /* Unlink the old file if present */
- (void) unlink(pathname);
- ret = bind(fd, (struct sockaddr *) &sun, sizeof(sun));
- if (ret < 0) {
- perror("bind");
- goto error;
+ sock = lttcomm_alloc_sock(src->proto);
+ if (sock == NULL) {
+ goto alloc_error;
}
- return fd;
+ lttcomm_copy_sock(sock, src);
-error:
- return ret;
+alloc_error:
+ return sock;
}
/*
- * Make the socket listen using LTTNG_SESSIOND_COMM_MAX_LISTEN.
+ * Create and copy socket from an allocated lttcomm socket structure.
+ *
+ * This is mostly useful when lttcomm_sock are passed between process where the
+ * fd and ops have to be changed within the correct address space.
*/
-int lttcomm_listen_unix_sock(int sock)
+LTTNG_HIDDEN
+void lttcomm_copy_sock(struct lttcomm_sock *dst, struct lttcomm_sock *src)
{
- int ret;
-
- ret = listen(sock, LTTNG_SESSIOND_COMM_MAX_LISTEN);
- if (ret < 0) {
- perror("listen");
- }
-
- return ret;
+ /* Safety net */
+ assert(dst);
+ assert(src);
+
+ dst->proto = src->proto;
+ dst->fd = src->fd;
+ dst->ops = src->ops;
+ /* Copy sockaddr information from original socket */
+ memcpy(&dst->sockaddr, &src->sockaddr, sizeof(dst->sockaddr));
}
/*
- * Receive data of size len in put that data into the buf param. Using recvmsg
- * API.
- *
- * Return the size of received data.
+ * Init IPv4 sockaddr structure.
*/
-ssize_t lttcomm_recv_unix_sock(int sock, void *buf, size_t len)
+LTTNG_HIDDEN
+int lttcomm_init_inet_sockaddr(struct lttcomm_sockaddr *sockaddr,
+ const char *ip, unsigned int port)
{
- struct msghdr msg;
- struct iovec iov[1];
- ssize_t ret = -1;
+ int ret;
- memset(&msg, 0, sizeof(msg));
+ assert(sockaddr);
+ assert(ip);
+ assert(port > 0 && port <= 65535);
- iov[0].iov_base = buf;
- iov[0].iov_len = len;
- msg.msg_iov = iov;
- msg.msg_iovlen = 1;
+ memset(sockaddr, 0, sizeof(struct lttcomm_sockaddr));
- ret = recvmsg(sock, &msg, MSG_WAITALL);
- if (ret < 0) {
- perror("recvmsg");
+ sockaddr->type = LTTCOMM_INET;
+ sockaddr->addr.sin.sin_family = AF_INET;
+ sockaddr->addr.sin.sin_port = htons(port);
+ ret = inet_pton(sockaddr->addr.sin.sin_family, ip,
+ &sockaddr->addr.sin.sin_addr);
+ if (ret < 1) {
+ ret = -1;
+ ERR("%s with port %d: unrecognized IPv4 address", ip, port);
+ goto error;
}
+ memset(sockaddr->addr.sin.sin_zero, 0, sizeof(sockaddr->addr.sin.sin_zero));
+error:
return ret;
}
/*
- * Send buf data of size len. Using sendmsg API.
- *
- * Return the size of sent data.
+ * Init IPv6 sockaddr structure.
*/
-ssize_t lttcomm_send_unix_sock(int sock, void *buf, size_t len)
+LTTNG_HIDDEN
+int lttcomm_init_inet6_sockaddr(struct lttcomm_sockaddr *sockaddr,
+ const char *ip, unsigned int port)
{
- struct msghdr msg;
- struct iovec iov[1];
- ssize_t ret = -1;
+ int ret;
- memset(&msg, 0, sizeof(msg));
+ assert(sockaddr);
+ assert(ip);
+ assert(port > 0 && port <= 65535);
- iov[0].iov_base = buf;
- iov[0].iov_len = len;
- msg.msg_iov = iov;
- msg.msg_iovlen = 1;
+ memset(sockaddr, 0, sizeof(struct lttcomm_sockaddr));
- ret = sendmsg(sock, &msg, 0);
- if (ret < 0) {
- perror("sendmsg");
+ sockaddr->type = LTTCOMM_INET6;
+ sockaddr->addr.sin6.sin6_family = AF_INET6;
+ sockaddr->addr.sin6.sin6_port = htons(port);
+ ret = inet_pton(sockaddr->addr.sin6.sin6_family, ip,
+ &sockaddr->addr.sin6.sin6_addr);
+ if (ret < 1) {
+ ret = -1;
+ goto error;
}
+error:
return ret;
}
/*
- * Shutdown cleanly a unix socket.
+ * Return allocated lttcomm socket structure from lttng URI.
*/
-int lttcomm_close_unix_sock(int sock)
+LTTNG_HIDDEN
+struct lttcomm_sock *lttcomm_alloc_sock_from_uri(struct lttng_uri *uri)
{
int ret;
+ int _sock_proto;
+ struct lttcomm_sock *sock = NULL;
+
+ /* Safety net */
+ assert(uri);
+
+ /* Check URI protocol */
+ if (uri->proto == LTTNG_TCP) {
+ _sock_proto = LTTCOMM_SOCK_TCP;
+ } else {
+ ERR("Relayd invalid URI proto: %d", uri->proto);
+ goto alloc_error;
+ }
- /* Shutdown receptions and transmissions */
- ret = shutdown(sock, SHUT_RDWR);
- if (ret < 0) {
- perror("shutdown");
+ sock = lttcomm_alloc_sock(_sock_proto);
+ if (sock == NULL) {
+ goto alloc_error;
}
- close(sock);
+ /* Check destination type */
+ if (uri->dtype == LTTNG_DST_IPV4) {
+ ret = lttcomm_init_inet_sockaddr(&sock->sockaddr, uri->dst.ipv4,
+ uri->port);
+ if (ret < 0) {
+ goto error;
+ }
+ } else if (uri->dtype == LTTNG_DST_IPV6) {
+ ret = lttcomm_init_inet6_sockaddr(&sock->sockaddr, uri->dst.ipv6,
+ uri->port);
+ if (ret < 0) {
+ goto error;
+ }
+ } else {
+ /* Command URI is invalid */
+ ERR("Relayd invalid URI dst type: %d", uri->dtype);
+ goto error;
+ }
- return ret;
+ return sock;
+
+error:
+ lttcomm_destroy_sock(sock);
+alloc_error:
+ return NULL;
}
/*
- * Send a message accompanied by fd(s) over a unix socket.
- *
- * Returns the size of data sent, or negative error value.
+ * Destroy and free lttcomm socket.
*/
-ssize_t lttcomm_send_fds_unix_sock(int sock, int *fds, size_t nb_fd)
+LTTNG_HIDDEN
+void lttcomm_destroy_sock(struct lttcomm_sock *sock)
{
- struct msghdr msg;
- struct cmsghdr *cmptr;
- struct iovec iov[1];
- ssize_t ret = -1;
- unsigned int sizeof_fds = nb_fd * sizeof(int);
- char tmp[CMSG_SPACE(sizeof_fds)];
- char dummy = 0;
-
- memset(&msg, 0, sizeof(msg));
-
- if (nb_fd > LTTCOMM_MAX_SEND_FDS)
- return -EINVAL;
-
- msg.msg_control = (caddr_t)tmp;
- msg.msg_controllen = CMSG_LEN(sizeof_fds);
-
- cmptr = CMSG_FIRSTHDR(&msg);
- cmptr->cmsg_level = SOL_SOCKET;
- cmptr->cmsg_type = SCM_RIGHTS;
- cmptr->cmsg_len = CMSG_LEN(sizeof_fds);
- memcpy(CMSG_DATA(cmptr), fds, sizeof_fds);
- /* Sum of the length of all control messages in the buffer: */
- msg.msg_controllen = cmptr->cmsg_len;
-
- iov[0].iov_base = &dummy;
- iov[0].iov_len = 1;
- msg.msg_iov = iov;
- msg.msg_iovlen = 1;
-
- ret = sendmsg(sock, &msg, 0);
- if (ret < 0) {
- perror("sendmsg");
- }
- return ret;
+ free(sock);
}
/*
- * Recv a message accompanied by fd(s) from a unix socket.
+ * Allocate and return a relayd socket object using a given URI to initialize
+ * it and the major/minor version of the supported protocol.
*
- * Returns the size of received data, or negative error value.
- *
- * Expect at most "nb_fd" file descriptors. Returns the number of fd
- * actually received in nb_fd.
+ * On error, NULL is returned.
*/
-ssize_t lttcomm_recv_fds_unix_sock(int sock, int *fds, size_t nb_fd)
+LTTNG_HIDDEN
+struct lttcomm_relayd_sock *lttcomm_alloc_relayd_sock(struct lttng_uri *uri,
+ uint32_t major, uint32_t minor)
{
- struct iovec iov[1];
- ssize_t ret = 0;
- struct cmsghdr *cmsg;
- size_t sizeof_fds = nb_fd * sizeof(int);
- char recv_fd[CMSG_SPACE(sizeof_fds)];
- struct msghdr msg;
- char dummy;
-
- memset(&msg, 0, sizeof(msg));
-
- /* Prepare to receive the structures */
- iov[0].iov_base = &dummy;
- iov[0].iov_len = 1;
- msg.msg_iov = iov;
- msg.msg_iovlen = 1;
- msg.msg_control = recv_fd;
- msg.msg_controllen = sizeof(recv_fd);
-
- ret = recvmsg(sock, &msg, 0);
- if (ret < 0) {
- perror("recvmsg fds");
- goto end;
- }
- if (ret != 1) {
- fprintf(stderr, "Error: Received %zd bytes, expected %d\n",
- ret, 1);
- goto end;
- }
- if (msg.msg_flags & MSG_CTRUNC) {
- fprintf(stderr, "Error: Control message truncated.\n");
- ret = -1;
- goto end;
- }
- cmsg = CMSG_FIRSTHDR(&msg);
- if (!cmsg) {
- fprintf(stderr, "Error: Invalid control message header\n");
- ret = -1;
- goto end;
+ int ret;
+ struct lttcomm_sock *tmp_sock = NULL;
+ struct lttcomm_relayd_sock *rsock = NULL;
+
+ assert(uri);
+
+ rsock = zmalloc(sizeof(*rsock));
+ if (!rsock) {
+ PERROR("zmalloc relayd sock");
+ goto error;
}
- if (cmsg->cmsg_level != SOL_SOCKET || cmsg->cmsg_type != SCM_RIGHTS) {
- fprintf(stderr, "Didn't received any fd\n");
- ret = -1;
- goto end;
+
+ /* Allocate socket object from URI */
+ tmp_sock = lttcomm_alloc_sock_from_uri(uri);
+ if (tmp_sock == NULL) {
+ goto error_free;
}
- if (cmsg->cmsg_len != CMSG_LEN(sizeof_fds)) {
- fprintf(stderr, "Error: Received %zu bytes of ancillary data, expected %zu\n",
- (size_t) cmsg->cmsg_len, (size_t) CMSG_LEN(sizeof_fds));
- ret = -1;
- goto end;
+
+ /*
+ * Create socket object which basically sets the ops according to the
+ * socket protocol.
+ */
+ lttcomm_copy_sock(&rsock->sock, tmp_sock);
+ /* Temporary socket pointer not needed anymore. */
+ lttcomm_destroy_sock(tmp_sock);
+ ret = lttcomm_create_sock(&rsock->sock);
+ if (ret < 0) {
+ goto error_free;
}
- memcpy(fds, CMSG_DATA(cmsg), sizeof_fds);
- ret = sizeof_fds;
-end:
- return ret;
+
+ rsock->major = major;
+ rsock->minor = minor;
+
+ return rsock;
+
+error_free:
+ free(rsock);
+error:
+ return NULL;
}
/*
- * Send a message with credentials over a unix socket.
- *
- * Returns the size of data sent, or negative error value.
+ * Set socket receiving timeout.
*/
-ssize_t lttcomm_send_creds_unix_sock(int sock, void *buf, size_t len)
+LTTNG_HIDDEN
+int lttcomm_setsockopt_rcv_timeout(int sock, unsigned int msec)
{
- struct msghdr msg;
- struct cmsghdr *cmptr;
- struct iovec iov[1];
- ssize_t ret = -1;
- size_t sizeof_cred = sizeof(lttng_sock_cred);
- char anc_buf[CMSG_SPACE(sizeof_cred)];
- lttng_sock_cred *creds;
-
- 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_control = (caddr_t) anc_buf;
- msg.msg_controllen = CMSG_LEN(sizeof_cred);
-
- cmptr = CMSG_FIRSTHDR(&msg);
- cmptr->cmsg_level = SOL_SOCKET;
- cmptr->cmsg_type = LTTNG_SOCK_CREDS;
- cmptr->cmsg_len = CMSG_LEN(sizeof_cred);
-
- creds = (lttng_sock_cred*) CMSG_DATA(cmptr);
+ int ret;
+ struct timeval tv;
- LTTNG_SOCK_SET_UID_CRED(creds, geteuid());
- LTTNG_SOCK_SET_GID_CRED(creds, getegid());
- LTTNG_SOCK_SET_PID_CRED(creds, getpid());
+ tv.tv_sec = msec / 1000;
+ tv.tv_usec = (msec % 1000) * 1000;
- ret = sendmsg(sock, &msg, 0);
+ ret = setsockopt(sock, SOL_SOCKET, SO_RCVTIMEO, &tv, sizeof(tv));
if (ret < 0) {
- perror("sendmsg");
+ PERROR("setsockopt SO_RCVTIMEO");
}
return ret;
}
/*
- * Recv a message accompanied with credentials from a unix socket.
- *
- * Returns the size of received data, or negative error value.
+ * Set socket sending timeout.
*/
-ssize_t lttcomm_recv_creds_unix_sock(int sock, void *buf, size_t len,
- lttng_sock_cred *creds)
+LTTNG_HIDDEN
+int lttcomm_setsockopt_snd_timeout(int sock, unsigned int msec)
{
- struct msghdr msg;
- struct cmsghdr *cmptr;
- struct iovec iov[1];
- ssize_t ret;
- size_t sizeof_cred = sizeof(lttng_sock_cred);
- char anc_buf[CMSG_SPACE(sizeof_cred)];
-
- memset(&msg, 0, sizeof(msg));
-
- /* Not allowed */
- if (creds == NULL) {
- ret = -1;
- goto end;
- }
-
- /* Prepare to receive the structures */
- iov[0].iov_base = buf;
- iov[0].iov_len = len;
- msg.msg_iov = iov;
- msg.msg_iovlen = 1;
+ int ret;
+ struct timeval tv;
- msg.msg_control = anc_buf;
- msg.msg_controllen = sizeof(anc_buf);
+ tv.tv_sec = msec / 1000;
+ tv.tv_usec = (msec % 1000) * 1000;
- ret = recvmsg(sock, &msg, 0);
+ ret = setsockopt(sock, SOL_SOCKET, SO_SNDTIMEO, &tv, sizeof(tv));
if (ret < 0) {
- perror("recvmsg fds");
- goto end;
- }
-
- if (msg.msg_flags & MSG_CTRUNC) {
- fprintf(stderr, "Error: Control message truncated.\n");
- ret = -1;
- goto end;
- }
-
- cmptr = CMSG_FIRSTHDR(&msg);
- if (cmptr == NULL) {
- fprintf(stderr, "Error: Invalid control message header\n");
- ret = -1;
- goto end;
+ PERROR("setsockopt SO_SNDTIMEO");
}
- if (cmptr->cmsg_level != SOL_SOCKET ||
- cmptr->cmsg_type != LTTNG_SOCK_CREDS) {
- fprintf(stderr, "Didn't received any credentials\n");
- ret = -1;
- goto end;
- }
-
- if (cmptr->cmsg_len != CMSG_LEN(sizeof_cred)) {
- fprintf(stderr, "Error: Received %zu bytes of ancillary data, expected %zu\n",
- (size_t) cmptr->cmsg_len, (size_t) CMSG_LEN(sizeof_cred));
- ret = -1;
- goto end;
- }
-
- memcpy(creds, CMSG_DATA(cmptr), sizeof_cred);
-
-end:
return ret;
}
-/*
- * Set socket option to use credentials passing.
- */
-int lttcomm_setsockopt_creds_unix_sock(int sock)
+LTTNG_HIDDEN
+void lttcomm_init(void)
{
- int ret, on = 1;
-
- /* Set socket for credentials retrieval */
- ret = setsockopt(sock, SOL_SOCKET, SO_PASSCRED, &on, sizeof(on));
- if (ret < 0) {
- perror("setsockopt creds unix sock");
+ 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;
+ }
+ }
}
+}
- return ret;
+LTTNG_HIDDEN
+unsigned long lttcomm_get_network_timeout(void)
+{
+ return network_timeout;
}