/*
- * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca>
+ * 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 as published by the Free
+ * Software Foundation; only version 2 of the License.
*
- * 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.
+ * 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., 59 Temple
+ * Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#define _GNU_SOURCE
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
-#include <sys/socket.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <sys/un.h>
#include <unistd.h>
+#include <errno.h>
#include <lttng-sessiond-comm.h>
[ 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_EVENT_EXIST) ] = "Kernel event already exists",
[ LTTCOMM_ERR_INDEX(LTTCOMM_KERN_SESS_FAIL) ] = "Kernel create session failed",
[ 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_SESS_FAIL) ] = "UST create session failed",
- [ LTTCOMM_ERR_INDEX(KCONSUMERD_COMMAND_SOCK_READY) ] = "Kconsumerd command socket ready",
- [ LTTCOMM_ERR_INDEX(KCONSUMERD_SUCCESS_RECV_FD) ] = "Kconsumerd success on receiving fds",
- [ LTTCOMM_ERR_INDEX(KCONSUMERD_ERROR_RECV_FD) ] = "Kconsumerd error on receiving fds",
- [ LTTCOMM_ERR_INDEX(KCONSUMERD_POLL_ERROR) ] = "Kconsumerd error in polling thread",
- [ LTTCOMM_ERR_INDEX(KCONSUMERD_POLL_NVAL) ] = "Kconsumerd polling on closed fd",
- [ LTTCOMM_ERR_INDEX(KCONSUMERD_POLL_HUP) ] = "Kconsumerd all fd hung up",
- [ LTTCOMM_ERR_INDEX(KCONSUMERD_EXIT_SUCCESS) ] = "Kconsumerd exiting normally",
- [ LTTCOMM_ERR_INDEX(KCONSUMERD_EXIT_FAILURE) ] = "Kconsumerd exiting on error",
- [ LTTCOMM_ERR_INDEX(KCONSUMERD_OUTFD_ERROR) ] = "Kconsumerd error opening the tracefile",
- [ LTTCOMM_ERR_INDEX(KCONSUMERD_SPLICE_EBADF) ] = "Kconsumerd splice EBADF",
- [ LTTCOMM_ERR_INDEX(KCONSUMERD_SPLICE_EINVAL) ] = "Kconsumerd splice EINVAL",
- [ LTTCOMM_ERR_INDEX(KCONSUMERD_SPLICE_ENOMEM) ] = "Kconsumerd splice ENOMEM",
- [ LTTCOMM_ERR_INDEX(KCONSUMERD_SPLICE_ESPIPE) ] = "Kconsumerd splice ESPIPE",
+ [ 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(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",
};
/*
- * lttcom_get_readable_code
+ * Return ptr to string representing a human readable error code from the
+ * lttcomm_return_code enum.
*
- * 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.
+ * These code MUST be negative in other to treat that as an error value.
*/
const char *lttcomm_get_readable_code(enum lttcomm_return_code code)
{
}
/*
- * lttcomm_connect_unix_sock
- *
- * Connect to unix socket using the path name.
+ * Connect to unix socket using the path name.
*/
int lttcomm_connect_unix_sock(const char *pathname)
{
ret = connect(fd, (struct sockaddr *) &sun, sizeof(sun));
if (ret < 0) {
/*
- * Don't print message on connect error, because connect
- * is used in normal execution to detect if sessiond is
- * alive.
+ * Don't print message on connect error, because connect is used in
+ * normal execution to detect if sessiond is alive.
*/
goto error_connect;
}
}
/*
- * lttcomm_accept_unix_sock
- *
- * Do an accept(2) on the sock and return the
- * new file descriptor. The socket MUST be bind(2) before.
+ * Do an accept(2) on the sock and return the new file descriptor. The socket
+ * MUST be bind(2) before.
*/
int lttcomm_accept_unix_sock(int sock)
{
new_fd = accept(sock, (struct sockaddr *) &sun, &len);
if (new_fd < 0) {
perror("accept");
- goto error;
}
return new_fd;
-
-error:
- return -1;
}
/*
- * lttcomm_create_unix_sock
- *
- * Creates a AF_UNIX local socket using pathname
- * bind the socket upon creation and return the fd.
+ * Creates a AF_UNIX local socket using pathname bind the socket upon creation
+ * and return the fd.
*/
int lttcomm_create_unix_sock(const char *pathname)
{
}
/*
- * lttcomm_listen_unix_sock
- *
- * Make the socket listen using MAX_LISTEN.
+ * Make the socket listen using LTTNG_SESSIOND_COMM_MAX_LISTEN.
*/
int lttcomm_listen_unix_sock(int sock)
{
int ret;
- ret = listen(sock, MAX_LISTEN);
+ ret = listen(sock, LTTNG_SESSIOND_COMM_MAX_LISTEN);
if (ret < 0) {
perror("listen");
}
}
/*
- * lttcomm_recv_unix_sock
+ * Receive data of size len in put that data into the buf param. Using recvmsg
+ * API.
*
- * Receive data of size len in put that data into
- * the buf param. Using recvmsg API.
- * Return the size of received data.
+ * Return the size of received data.
*/
ssize_t lttcomm_recv_unix_sock(int sock, void *buf, size_t len)
{
}
/*
- * lttcomm_send_unix_sock
+ * Send buf data of size len. Using sendmsg API.
*
- * Send buf data of size len. Using sendmsg API.
- * Return the size of sent data.
+ * Return the size of sent data.
*/
ssize_t lttcomm_send_unix_sock(int sock, void *buf, size_t len)
{
}
/*
- * lttcomm_close_unix_sock
- *
- * Shutdown cleanly a unix socket.
+ * Shutdown cleanly a unix socket.
*/
int lttcomm_close_unix_sock(int sock)
{
}
/*
- * lttcomm_send_fds_unix_sock
+ * Send a message accompanied by fd(s) over a unix socket.
*
- * Send multiple fds on a unix socket.
+ * Returns the size of data sent, or negative error value.
*/
-ssize_t lttcomm_send_fds_unix_sock(int sock, void *buf, int *fds, size_t nb_fd, size_t len)
+ssize_t lttcomm_send_fds_unix_sock(int sock, int *fds, size_t nb_fd)
{
struct msghdr msg = { 0 };
struct cmsghdr *cmptr;
ssize_t ret = -1;
unsigned int sizeof_fds = nb_fd * sizeof(int);
char tmp[CMSG_SPACE(sizeof_fds)];
+ char dummy = 0;
- /*
- * Note: the consumerd receiver only supports receiving one FD per
- * message.
- */
- assert(nb_fd == 1);
+ if (nb_fd > LTTCOMM_MAX_SEND_FDS)
+ return -EINVAL;
msg.msg_control = (caddr_t)tmp;
msg.msg_controllen = CMSG_LEN(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;
+}
+
+/*
+ * Recv a message accompanied by fd(s) from a unix socket.
+ *
+ * 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.
+ */
+ssize_t lttcomm_recv_fds_unix_sock(int sock, int *fds, size_t nb_fd)
+{
+ 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 = { 0 };
+ char dummy;
+
+ /* 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;
+ }
+ if (cmsg->cmsg_level != SOL_SOCKET || cmsg->cmsg_type != SCM_RIGHTS) {
+ fprintf(stderr, "Didn't received any fd\n");
+ ret = -1;
+ goto end;
+ }
+ if (cmsg->cmsg_len != CMSG_LEN(sizeof_fds)) {
+ fprintf(stderr, "Error: Received %zu bytes of ancillary data, expected %zu\n",
+ cmsg->cmsg_len, CMSG_LEN(sizeof_fds));
+ ret = -1;
+ goto end;
+ }
+ memcpy(fds, CMSG_DATA(cmsg), sizeof_fds);
+ ret = sizeof_fds;
+end:
+ return ret;
+}
+
+/*
+ * Send a message with credentials over a unix socket.
+ *
+ * Returns the size of data sent, or negative error value.
+ */
+ssize_t lttcomm_send_creds_unix_sock(int sock, void *buf, size_t len)
+{
+ struct msghdr msg = { 0 };
+ struct cmsghdr *cmptr;
+ struct iovec iov[1];
+ ssize_t ret = -1;
+ struct ucred *creds;
+ size_t sizeof_cred = sizeof(struct ucred);
+ char anc_buf[CMSG_SPACE(sizeof_cred)];
+
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 = SCM_CREDENTIALS;
+ cmptr->cmsg_len = CMSG_LEN(sizeof_cred);
+
+ creds = (struct ucred *) CMSG_DATA(cmptr);
+
+ creds->uid = geteuid();
+ creds->gid = getegid();
+ creds->pid = getpid();
+
ret = sendmsg(sock, &msg, 0);
if (ret < 0) {
perror("sendmsg");
return ret;
}
+
+/*
+ * Recv a message accompanied with credentials from a unix socket.
+ *
+ * Returns the size of received data, or negative error value.
+ */
+ssize_t lttcomm_recv_creds_unix_sock(int sock, void *buf, size_t len,
+ struct ucred *creds)
+{
+ struct msghdr msg = { 0 };
+ struct cmsghdr *cmptr;
+ struct iovec iov[1];
+ ssize_t ret;
+ size_t sizeof_cred = sizeof(struct ucred);
+ char anc_buf[CMSG_SPACE(sizeof_cred)];
+
+ /* 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;
+
+ msg.msg_control = anc_buf;
+ msg.msg_controllen = sizeof(anc_buf);
+
+ ret = recvmsg(sock, &msg, 0);
+ 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;
+ }
+
+ if (cmptr->cmsg_level != SOL_SOCKET ||
+ cmptr->cmsg_type != SCM_CREDENTIALS) {
+ 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",
+ cmptr->cmsg_len, 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)
+{
+ 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");
+ }
+
+ return ret;
+}
projects / lttng-tools.git / blobdiff