[lttng-tools.git] / src / common / sessiond-comm / inet6.c

/*
 * Copyright (C) 2012 David Goulet <dgoulet@efficios.com>
 *
 * SPDX-License-Identifier: GPL-2.0-only
 *
 */

#define _LGPL_SOURCE
#include <limits.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <unistd.h>
#include <fcntl.h>
#include <common/compat/time.h>
#include <poll.h>

#include <common/common.h>
#include <common/time.h>
#include <common/compat/errno.h>

#include "inet6.h"

#define RECONNECT_DELAY	200	/* ms */

/*
 * INET protocol operations.
 */
static const struct lttcomm_proto_ops inet6_ops = {
	.bind = lttcomm_bind_inet6_sock,
	.close = lttcomm_close_inet6_sock,
	.connect = lttcomm_connect_inet6_sock,
	.accept = lttcomm_accept_inet6_sock,
	.listen = lttcomm_listen_inet6_sock,
	.recvmsg = lttcomm_recvmsg_inet6_sock,
	.sendmsg = lttcomm_sendmsg_inet6_sock,
};

/*
 * Creates an PF_INET socket.
 */
int lttcomm_create_inet6_sock(struct lttcomm_sock *sock, int type, int proto)
{
	int val = 1, ret;
	unsigned long timeout;

	/* Create server socket */
	if ((sock->fd = socket(PF_INET6, type, proto)) < 0) {
		PERROR("socket inet6");
		goto error;
	}

	sock->ops = &inet6_ops;

	/*
	 * Set socket option to reuse the address.
	 */
	ret = setsockopt(sock->fd, SOL_SOCKET, SO_REUSEADDR, &val, sizeof(int));
	if (ret < 0) {
		PERROR("setsockopt inet6");
		goto error;
	}
	timeout = lttcomm_get_network_timeout();
	if (timeout) {
		ret = lttcomm_setsockopt_rcv_timeout(sock->fd, timeout);
		if (ret) {
			goto error;
		}
		ret = lttcomm_setsockopt_snd_timeout(sock->fd, timeout);
		if (ret) {
			goto error;
		}
	}

	return 0;

error:
	return -1;
}

/*
 * Bind socket and return.
 */
int lttcomm_bind_inet6_sock(struct lttcomm_sock *sock)
{
	return bind(sock->fd,
			(const struct sockaddr *) ALIGNED_CONST_PTR(
					sock->sockaddr.addr.sin6),
			sizeof(sock->sockaddr.addr.sin6));
}

static
int connect_no_timeout(struct lttcomm_sock *sock)
{
	return connect(sock->fd,
			(const struct sockaddr *) ALIGNED_CONST_PTR(
					sock->sockaddr.addr.sin6),
			sizeof(sock->sockaddr.addr.sin6));
}

static
int connect_with_timeout(struct lttcomm_sock *sock)
{
	unsigned long timeout = lttcomm_get_network_timeout();
	int ret, flags, connect_ret;
	struct timespec orig_time, cur_time;
	unsigned long diff_ms;

	ret = fcntl(sock->fd, F_GETFL, 0);
	if (ret == -1) {
		PERROR("fcntl");
		return -1;
	}
	flags = ret;

	/* Set socket to nonblock */
	ret = fcntl(sock->fd, F_SETFL, flags | O_NONBLOCK);
	if (ret == -1) {
		PERROR("fcntl");
		return -1;
	}

	ret = lttng_clock_gettime(CLOCK_MONOTONIC, &orig_time);
	if (ret == -1) {
		PERROR("clock_gettime");
		return -1;
	}

	connect_ret = connect(sock->fd,
			(const struct sockaddr *) ALIGNED_CONST_PTR(
					sock->sockaddr.addr.sin6),
			sizeof(sock->sockaddr.addr.sin6));
	if (connect_ret == -1 && errno != EAGAIN && errno != EWOULDBLOCK &&
			errno != EINPROGRESS) {
		goto error;
	} else if (!connect_ret) {
		/* Connect succeeded */
		goto success;
	}

	DBG("Asynchronous connect for sock %d, performing polling with"
			" timeout: %lums", sock->fd, timeout);

	/*
	 * Perform poll loop following EINPROGRESS recommendation from
	 * connect(2) man page.
	 */
	do {
		struct pollfd fds;

		fds.fd = sock->fd;
		fds.events = POLLOUT;
		fds.revents = 0;
		ret = poll(&fds, 1, RECONNECT_DELAY);
		if (ret < 0) {
			goto error;
		} else if (ret > 0) {
			int optval;
			socklen_t optval_len = sizeof(optval);

			if (!(fds.revents & POLLOUT)) {
				/* Either hup or error */
				errno = EPIPE;
				goto error;
			}
			/* got something */
			ret = getsockopt(sock->fd, SOL_SOCKET,
				SO_ERROR, &optval, &optval_len);
			if (ret) {
				PERROR("getsockopt");
				goto error;
			}
			if (!optval) {
				connect_ret = 0;
				goto success;
			} else {
				/* Get actual connect() errno from opt_val */
				errno = optval;
				goto error;
			}
		}
		/* ret == 0: timeout */
		ret = lttng_clock_gettime(CLOCK_MONOTONIC, &cur_time);
		if (ret == -1) {
			PERROR("clock_gettime");
			connect_ret = ret;
			goto error;
		}
		if (timespec_to_ms(timespec_abs_diff(cur_time, orig_time), &diff_ms) < 0) {
			ERR("timespec_to_ms input overflows milliseconds output");
			connect_ret = -1;
			goto error;
		}
	} while (diff_ms < timeout);

	/* Timeout */
	errno = ETIMEDOUT;
	connect_ret = -1;

success:
	/* Restore initial flags */
	ret = fcntl(sock->fd, F_SETFL, flags);
	if (ret == -1) {
		PERROR("fcntl");
		/* Continue anyway */
	}
error:
	return connect_ret;
}

/*
 * Connect PF_INET socket.
 */
int lttcomm_connect_inet6_sock(struct lttcomm_sock *sock)
{
	int ret, closeret;

	if (lttcomm_get_network_timeout()) {
		ret = connect_with_timeout(sock);
	} else {
		ret = connect_no_timeout(sock);
	}
	if (ret < 0) {
		PERROR("connect inet6");
		goto error_connect;
	}

	return ret;

error_connect:
	closeret = close(sock->fd);
	if (closeret) {
		PERROR("close inet6");
	}

	return ret;
}

/*
 * Do an accept(2) on the sock and return the new lttcomm socket. The socket
 * MUST be bind(2) before.
 */
struct lttcomm_sock *lttcomm_accept_inet6_sock(struct lttcomm_sock *sock)
{
	int new_fd;
	socklen_t len;
	struct lttcomm_sock *new_sock;
	struct sockaddr_in6 new_addr = {};

	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;
	}

	len = sizeof(new_addr);

	/* Blocking call */
	new_fd = accept(sock->fd, (struct sockaddr *) &new_addr, &len);
	if (new_fd < 0) {
		PERROR("accept inet6");
		goto error;
	}
	new_sock->sockaddr.addr.sin6 = new_addr;
	new_sock->fd = new_fd;
	new_sock->ops = &inet6_ops;

end:
	return new_sock;

error:
	free(new_sock);
	return NULL;
}

/*
 * Make the socket listen using LTTNG_SESSIOND_COMM_MAX_LISTEN.
 */
int lttcomm_listen_inet6_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 inet6");
	}

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.
 */
ssize_t lttcomm_recvmsg_inet6_sock(struct lttcomm_sock *sock, void *buf,
		size_t len, int flags)
{
	struct msghdr msg;
	struct iovec iov[1];
	ssize_t ret = -1;
	size_t len_last;
	struct sockaddr_in6 addr = sock->sockaddr.addr.sin6;

	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 *) &addr;
	msg.msg_namelen = sizeof(sock->sockaddr.addr.sin6);

	do {
		len_last = iov[0].iov_len;
		ret = recvmsg(sock->fd, &msg, flags);
		if (ret > 0) {
			if (flags & MSG_DONTWAIT) {
				goto end;
			}
			iov[0].iov_base += ret;
			iov[0].iov_len -= ret;
			LTTNG_ASSERT(ret <= len_last);
		}
	} while ((ret > 0 && ret < len_last) || (ret < 0 && errno == EINTR));
	if (ret < 0) {
		PERROR("recvmsg inet");
	} else if (ret > 0) {
		ret = len;
	}
	/* Else ret = 0 meaning an orderly shutdown. */
end:
	return ret;
}

/*
 * Send buf data of size len. Using sendmsg API.
 *
 * Return the size of sent data.
 */
ssize_t lttcomm_sendmsg_inet6_sock(struct lttcomm_sock *sock, const 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 = (void *) buf;
	iov[0].iov_len = len;
	msg.msg_iov = iov;
	msg.msg_iovlen = 1;

	switch (sock->proto) {
	case LTTCOMM_SOCK_UDP:
	{
		struct sockaddr_in6 addr = sock->sockaddr.addr.sin6;

		msg.msg_name = (struct sockaddr *) &addr;
		msg.msg_namelen = sizeof(sock->sockaddr.addr.sin6);
		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 inet6");
		}
	}

	return ret;
}

/*
 * Shutdown cleanly and close.
 */
int lttcomm_close_inet6_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 inet6");
	}

	/* Mark socket */
	sock->fd = -1;

	return ret;
}
Commit	Line	Data
6364a07a	1	/*
ab5be9fa	2	* Copyright (C) 2012 David Goulet <dgoulet@efficios.com>
6364a07a	3	*
ab5be9fa	4	* SPDX-License-Identifier: GPL-2.0-only
6364a07a	5	*
6364a07a DG	6	*/
6364a07a DG	7
6c1c0768	8	#define _LGPL_SOURCE
6364a07a DG	9	#include <limits.h>
	10	#include <stdio.h>
	11	#include <stdlib.h>
	12	#include <string.h>
	13	#include <sys/stat.h>
	14	#include <sys/types.h>
	15	#include <unistd.h>
a655f4cf	16	#include <fcntl.h>
389fbf04	17	#include <common/compat/time.h>
a655f4cf	18	#include <poll.h>
6364a07a	19
90e535ef	20	#include <common/common.h>
395d6b02	21	#include <common/time.h>
edf4b93e	22	#include <common/compat/errno.h>
6364a07a DG	23
	24	#include "inet6.h"
	25
a655f4cf MD	26	#define RECONNECT_DELAY 200 /* ms */
a655f4cf MD	27
6364a07a DG	28	/*
	29	* INET protocol operations.
	30	*/
	31	static const struct lttcomm_proto_ops inet6_ops = {
	32	.bind = lttcomm_bind_inet6_sock,
	33	.close = lttcomm_close_inet6_sock,
	34	.connect = lttcomm_connect_inet6_sock,
	35	.accept = lttcomm_accept_inet6_sock,
	36	.listen = lttcomm_listen_inet6_sock,
	37	.recvmsg = lttcomm_recvmsg_inet6_sock,
	38	.sendmsg = lttcomm_sendmsg_inet6_sock,
	39	};
	40
	41	/*
	42	* Creates an PF_INET socket.
	43	*/
	44	int lttcomm_create_inet6_sock(struct lttcomm_sock *sock, int type, int proto)
	45	{
de5e9086	46	int val = 1, ret;
783a3b9a	47	unsigned long timeout;
6364a07a DG	48
6364a07a DG	49	/* Create server socket */
7b43086d	50	if ((sock->fd = socket(PF_INET6, type, proto)) < 0) {
6364a07a DG	51	PERROR("socket inet6");
	52	goto error;
	53	}
	54
	55	sock->ops = &inet6_ops;
	56
	57	/*
	58	* Set socket option to reuse the address.
	59	*/
	60	ret = setsockopt(sock->fd, SOL_SOCKET, SO_REUSEADDR, &val, sizeof(int));
	61	if (ret < 0) {
	62	PERROR("setsockopt inet6");
	63	goto error;
	64	}
783a3b9a MD	65	timeout = lttcomm_get_network_timeout();
	66	if (timeout) {
	67	ret = lttcomm_setsockopt_rcv_timeout(sock->fd, timeout);
	68	if (ret) {
	69	goto error;
	70	}
	71	ret = lttcomm_setsockopt_snd_timeout(sock->fd, timeout);
	72	if (ret) {
	73	goto error;
	74	}
	75	}
6364a07a DG	76
	77	return 0;
	78
	79	error:
	80	return -1;
	81	}
	82
	83	/*
	84	* Bind socket and return.
	85	*/
	86	int lttcomm_bind_inet6_sock(struct lttcomm_sock *sock)
	87	{
2288467f	88	return bind(sock->fd,
1a65bbb8 JG	89	(const struct sockaddr *) ALIGNED_CONST_PTR(
1a65bbb8 JG	90	sock->sockaddr.addr.sin6),
6364a07a	91	sizeof(sock->sockaddr.addr.sin6));
6364a07a DG	92	}
6364a07a DG	93
a655f4cf MD	94	static
	95	int connect_no_timeout(struct lttcomm_sock *sock)
	96	{
1a65bbb8 JG	97	return connect(sock->fd,
	98	(const struct sockaddr *) ALIGNED_CONST_PTR(
	99	sock->sockaddr.addr.sin6),
a655f4cf MD	100	sizeof(sock->sockaddr.addr.sin6));
	101	}
	102
a655f4cf MD	103	static
	104	int connect_with_timeout(struct lttcomm_sock *sock)
	105	{
	106	unsigned long timeout = lttcomm_get_network_timeout();
	107	int ret, flags, connect_ret;
	108	struct timespec orig_time, cur_time;
2daf6502	109	unsigned long diff_ms;
a655f4cf MD	110
	111	ret = fcntl(sock->fd, F_GETFL, 0);
	112	if (ret == -1) {
	113	PERROR("fcntl");
	114	return -1;
	115	}
	116	flags = ret;
	117
	118	/* Set socket to nonblock */
	119	ret = fcntl(sock->fd, F_SETFL, flags \| O_NONBLOCK);
	120	if (ret == -1) {
	121	PERROR("fcntl");
	122	return -1;
	123	}
	124
389fbf04	125	ret = lttng_clock_gettime(CLOCK_MONOTONIC, &orig_time);
a655f4cf MD	126	if (ret == -1) {
	127	PERROR("clock_gettime");
	128	return -1;
	129	}
	130
	131	connect_ret = connect(sock->fd,
1a65bbb8 JG	132	(const struct sockaddr *) ALIGNED_CONST_PTR(
	133	sock->sockaddr.addr.sin6),
	134	sizeof(sock->sockaddr.addr.sin6));
	135	if (connect_ret == -1 && errno != EAGAIN && errno != EWOULDBLOCK &&
	136	errno != EINPROGRESS) {
a655f4cf MD	137	goto error;
	138	} else if (!connect_ret) {
	139	/* Connect succeeded */
	140	goto success;
	141	}
	142
48ac9596 JR	143	DBG("Asynchronous connect for sock %d, performing polling with"
	144	" timeout: %lums", sock->fd, timeout);
	145
a655f4cf MD	146	/*
	147	* Perform poll loop following EINPROGRESS recommendation from
	148	* connect(2) man page.
	149	*/
	150	do {
	151	struct pollfd fds;
	152
	153	fds.fd = sock->fd;
	154	fds.events = POLLOUT;
	155	fds.revents = 0;
	156	ret = poll(&fds, 1, RECONNECT_DELAY);
	157	if (ret < 0) {
	158	goto error;
	159	} else if (ret > 0) {
	160	int optval;
	161	socklen_t optval_len = sizeof(optval);
	162
	163	if (!(fds.revents & POLLOUT)) {
	164	/* Either hup or error */
	165	errno = EPIPE;
	166	goto error;
	167	}
	168	/* got something */
	169	ret = getsockopt(sock->fd, SOL_SOCKET,
	170	SO_ERROR, &optval, &optval_len);
	171	if (ret) {
48ac9596	172	PERROR("getsockopt");
a655f4cf MD	173	goto error;
	174	}
	175	if (!optval) {
	176	connect_ret = 0;
	177	goto success;
	178	} else {
48ac9596 JR	179	/* Get actual connect() errno from opt_val */
48ac9596 JR	180	errno = optval;
a655f4cf MD	181	goto error;
	182	}
	183	}
	184	/* ret == 0: timeout */
389fbf04	185	ret = lttng_clock_gettime(CLOCK_MONOTONIC, &cur_time);
a655f4cf MD	186	if (ret == -1) {
	187	PERROR("clock_gettime");
	188	connect_ret = ret;
	189	goto error;
	190	}
2daf6502 MD	191	if (timespec_to_ms(timespec_abs_diff(cur_time, orig_time), &diff_ms) < 0) {
	192	ERR("timespec_to_ms input overflows milliseconds output");
	193	connect_ret = -1;
	194	goto error;
	195	}
	196	} while (diff_ms < timeout);
a655f4cf MD	197
	198	/* Timeout */
	199	errno = ETIMEDOUT;
	200	connect_ret = -1;
	201
	202	success:
	203	/* Restore initial flags */
	204	ret = fcntl(sock->fd, F_SETFL, flags);
	205	if (ret == -1) {
	206	PERROR("fcntl");
	207	/* Continue anyway */
	208	}
	209	error:
	210	return connect_ret;
	211	}
	212
6364a07a DG	213	/*
	214	* Connect PF_INET socket.
	215	*/
	216	int lttcomm_connect_inet6_sock(struct lttcomm_sock *sock)
	217	{
	218	int ret, closeret;
	219
a655f4cf MD	220	if (lttcomm_get_network_timeout()) {
	221	ret = connect_with_timeout(sock);
	222	} else {
	223	ret = connect_no_timeout(sock);
	224	}
6364a07a	225	if (ret < 0) {
82c05d47	226	PERROR("connect inet6");
6364a07a DG	227	goto error_connect;
	228	}
	229
	230	return ret;
	231
	232	error_connect:
	233	closeret = close(sock->fd);
	234	if (closeret) {
	235	PERROR("close inet6");
	236	}
	237
	238	return ret;
	239	}
	240
	241	/*
	242	* Do an accept(2) on the sock and return the new lttcomm socket. The socket
	243	* MUST be bind(2) before.
	244	*/
	245	struct lttcomm_sock lttcomm_accept_inet6_sock(struct lttcomm_sock sock)
	246	{
	247	int new_fd;
88a5db70	248	socklen_t len;
6364a07a	249	struct lttcomm_sock *new_sock;
1a65bbb8	250	struct sockaddr_in6 new_addr = {};
6364a07a DG	251
	252	if (sock->proto == LTTCOMM_SOCK_UDP) {
	253	/*
	254	* accept(2) does not exist for UDP so simply return the passed socket.
	255	*/
	256	new_sock = sock;
	257	goto end;
	258	}
	259
de5e9086	260	new_sock = lttcomm_alloc_sock(sock->proto);
6364a07a DG	261	if (new_sock == NULL) {
	262	goto error;
	263	}
	264
1a65bbb8	265	len = sizeof(new_addr);
88a5db70	266
6364a07a	267	/* Blocking call */
1a65bbb8	268	new_fd = accept(sock->fd, (struct sockaddr *) &new_addr, &len);
6364a07a DG	269	if (new_fd < 0) {
	270	PERROR("accept inet6");
	271	goto error;
	272	}
1a65bbb8	273	new_sock->sockaddr.addr.sin6 = new_addr;
6364a07a	274	new_sock->fd = new_fd;
de5e9086	275	new_sock->ops = &inet6_ops;
6364a07a DG	276
	277	end:
	278	return new_sock;
	279
	280	error:
	281	free(new_sock);
	282	return NULL;
	283	}
	284
	285	/*
	286	* Make the socket listen using LTTNG_SESSIOND_COMM_MAX_LISTEN.
	287	*/
	288	int lttcomm_listen_inet6_sock(struct lttcomm_sock *sock, int backlog)
	289	{
	290	int ret;
	291
	292	if (sock->proto == LTTCOMM_SOCK_UDP) {
	293	/* listen(2) does not exist for UDP so simply return success. */
	294	ret = 0;
	295	goto end;
	296	}
	297
	298	/* Default listen backlog */
	299	if (backlog <= 0) {
	300	backlog = LTTNG_SESSIOND_COMM_MAX_LISTEN;
	301	}
	302
	303	ret = listen(sock->fd, backlog);
	304	if (ret < 0) {
	305	PERROR("listen inet6");
	306	}
	307
	308	end:
	309	return ret;
	310	}
	311
	312	/*
	313	* Receive data of size len in put that data into the buf param. Using recvmsg
	314	* API.
	315	*
	316	* Return the size of received data.
	317	*/
	318	ssize_t lttcomm_recvmsg_inet6_sock(struct lttcomm_sock sock, void buf,
	319	size_t len, int flags)
	320	{
	321	struct msghdr msg;
	322	struct iovec iov[1];
	323	ssize_t ret = -1;
7c5aef62	324	size_t len_last;
1a65bbb8	325	struct sockaddr_in6 addr = sock->sockaddr.addr.sin6;
6364a07a DG	326
	327	memset(&msg, 0, sizeof(msg));
	328
	329	iov[0].iov_base = buf;
	330	iov[0].iov_len = len;
	331	msg.msg_iov = iov;
	332	msg.msg_iovlen = 1;
	333
1a65bbb8	334	msg.msg_name = (struct sockaddr *) &addr;
6364a07a DG	335	msg.msg_namelen = sizeof(sock->sockaddr.addr.sin6);
6364a07a DG	336
6364a07a	337	do {
7c5aef62	338	len_last = iov[0].iov_len;
6364a07a	339	ret = recvmsg(sock->fd, &msg, flags);
7c5aef62	340	if (ret > 0) {
5312a3ed JG	341	if (flags & MSG_DONTWAIT) {
	342	goto end;
	343	}
7c5aef62 DG	344	iov[0].iov_base += ret;
7c5aef62 DG	345	iov[0].iov_len -= ret;
a0377dfe	346	LTTNG_ASSERT(ret <= len_last);
7c5aef62 DG	347	}
7c5aef62 DG	348	} while ((ret > 0 && ret < len_last) \|\| (ret < 0 && errno == EINTR));
6364a07a	349	if (ret < 0) {
7c5aef62 DG	350	PERROR("recvmsg inet");
	351	} else if (ret > 0) {
	352	ret = len;
6364a07a	353	}
7c5aef62	354	/* Else ret = 0 meaning an orderly shutdown. */
5312a3ed	355	end:
6364a07a DG	356	return ret;
	357	}
	358
	359	/*
	360	* Send buf data of size len. Using sendmsg API.
	361	*
	362	* Return the size of sent data.
	363	*/
c2d69327	364	ssize_t lttcomm_sendmsg_inet6_sock(struct lttcomm_sock sock, const void buf,
6364a07a DG	365	size_t len, int flags)
	366	{
	367	struct msghdr msg;
	368	struct iovec iov[1];
	369	ssize_t ret = -1;
	370
	371	memset(&msg, 0, sizeof(msg));
	372
c2d69327	373	iov[0].iov_base = (void *) buf;
6364a07a DG	374	iov[0].iov_len = len;
	375	msg.msg_iov = iov;
	376	msg.msg_iovlen = 1;
	377
	378	switch (sock->proto) {
	379	case LTTCOMM_SOCK_UDP:
1a65bbb8 JG	380	{
	381	struct sockaddr_in6 addr = sock->sockaddr.addr.sin6;
	382
	383	msg.msg_name = (struct sockaddr *) &addr;
6364a07a DG	384	msg.msg_namelen = sizeof(sock->sockaddr.addr.sin6);
6364a07a DG	385	break;
1a65bbb8	386	}
6364a07a DG	387	default:
	388	break;
	389	}
	390
	391	do {
	392	ret = sendmsg(sock->fd, &msg, flags);
	393	} while (ret < 0 && errno == EINTR);
	394	if (ret < 0) {
	395	/*
	396	* Only warn about EPIPE when quiet mode is deactivated.
	397	* We consider EPIPE as expected.
	398	*/
	399	if (errno != EPIPE \|\| !lttng_opt_quiet) {
	400	PERROR("sendmsg inet6");
	401	}
	402	}
	403
	404	return ret;
	405	}
	406
	407	/*
	408	* Shutdown cleanly and close.
	409	*/
	410	int lttcomm_close_inet6_sock(struct lttcomm_sock *sock)
	411	{
6e742359	412	int ret;
6364a07a	413
de5e9086	414	/* Don't try to close an invalid marked socket */
6364a07a DG	415	if (sock->fd == -1) {
	416	return 0;
	417	}
	418
6e742359 DG	419	ret = close(sock->fd);
6e742359 DG	420	if (ret) {
6364a07a DG	421	PERROR("close inet6");
	422	}
	423
	424	/* Mark socket */
	425	sock->fd = -1;
	426
	427	return ret;
	428	}