[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 <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 <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.
 */
LTTNG_HIDDEN
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.
 */
LTTNG_HIDDEN
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.
 */
LTTNG_HIDDEN
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.
 */
LTTNG_HIDDEN
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.
 */
LTTNG_HIDDEN
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.
 */
LTTNG_HIDDEN
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;
			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.
 */
LTTNG_HIDDEN
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.
 */
LTTNG_HIDDEN
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 <assert.h>
	10	#include <limits.h>
	11	#include <stdio.h>
	12	#include <stdlib.h>
	13	#include <string.h>
	14	#include <sys/stat.h>
	15	#include <sys/types.h>
	16	#include <unistd.h>
a655f4cf	17	#include <fcntl.h>
389fbf04	18	#include <common/compat/time.h>
a655f4cf	19	#include <poll.h>
6364a07a	20
90e535ef	21	#include <common/common.h>
395d6b02	22	#include <common/time.h>
edf4b93e	23	#include <common/compat/errno.h>
6364a07a DG	24
	25	#include "inet6.h"
	26
a655f4cf MD	27	#define RECONNECT_DELAY 200 /* ms */
a655f4cf MD	28
6364a07a DG	29	/*
	30	* INET protocol operations.
	31	*/
	32	static const struct lttcomm_proto_ops inet6_ops = {
	33	.bind = lttcomm_bind_inet6_sock,
	34	.close = lttcomm_close_inet6_sock,
	35	.connect = lttcomm_connect_inet6_sock,
	36	.accept = lttcomm_accept_inet6_sock,
	37	.listen = lttcomm_listen_inet6_sock,
	38	.recvmsg = lttcomm_recvmsg_inet6_sock,
	39	.sendmsg = lttcomm_sendmsg_inet6_sock,
	40	};
	41
	42	/*
	43	* Creates an PF_INET socket.
	44	*/
90e535ef	45	LTTNG_HIDDEN
6364a07a DG	46	int lttcomm_create_inet6_sock(struct lttcomm_sock *sock, int type, int proto)
6364a07a DG	47	{
de5e9086	48	int val = 1, ret;
783a3b9a	49	unsigned long timeout;
6364a07a DG	50
6364a07a DG	51	/* Create server socket */
7b43086d	52	if ((sock->fd = socket(PF_INET6, type, proto)) < 0) {
6364a07a DG	53	PERROR("socket inet6");
	54	goto error;
	55	}
	56
	57	sock->ops = &inet6_ops;
	58
	59	/*
	60	* Set socket option to reuse the address.
	61	*/
	62	ret = setsockopt(sock->fd, SOL_SOCKET, SO_REUSEADDR, &val, sizeof(int));
	63	if (ret < 0) {
	64	PERROR("setsockopt inet6");
	65	goto error;
	66	}
783a3b9a MD	67	timeout = lttcomm_get_network_timeout();
	68	if (timeout) {
	69	ret = lttcomm_setsockopt_rcv_timeout(sock->fd, timeout);
	70	if (ret) {
	71	goto error;
	72	}
	73	ret = lttcomm_setsockopt_snd_timeout(sock->fd, timeout);
	74	if (ret) {
	75	goto error;
	76	}
	77	}
6364a07a DG	78
	79	return 0;
	80
	81	error:
	82	return -1;
	83	}
	84
	85	/*
	86	* Bind socket and return.
	87	*/
90e535ef	88	LTTNG_HIDDEN
6364a07a DG	89	int lttcomm_bind_inet6_sock(struct lttcomm_sock *sock)
6364a07a DG	90	{
2288467f	91	return bind(sock->fd,
1a65bbb8 JG	92	(const struct sockaddr *) ALIGNED_CONST_PTR(
1a65bbb8 JG	93	sock->sockaddr.addr.sin6),
6364a07a	94	sizeof(sock->sockaddr.addr.sin6));
6364a07a DG	95	}
6364a07a DG	96
a655f4cf MD	97	static
	98	int connect_no_timeout(struct lttcomm_sock *sock)
	99	{
1a65bbb8 JG	100	return connect(sock->fd,
	101	(const struct sockaddr *) ALIGNED_CONST_PTR(
	102	sock->sockaddr.addr.sin6),
a655f4cf MD	103	sizeof(sock->sockaddr.addr.sin6));
	104	}
	105
a655f4cf MD	106	static
	107	int connect_with_timeout(struct lttcomm_sock *sock)
	108	{
	109	unsigned long timeout = lttcomm_get_network_timeout();
	110	int ret, flags, connect_ret;
	111	struct timespec orig_time, cur_time;
2daf6502	112	unsigned long diff_ms;
a655f4cf MD	113
	114	ret = fcntl(sock->fd, F_GETFL, 0);
	115	if (ret == -1) {
	116	PERROR("fcntl");
	117	return -1;
	118	}
	119	flags = ret;
	120
	121	/* Set socket to nonblock */
	122	ret = fcntl(sock->fd, F_SETFL, flags \| O_NONBLOCK);
	123	if (ret == -1) {
	124	PERROR("fcntl");
	125	return -1;
	126	}
	127
389fbf04	128	ret = lttng_clock_gettime(CLOCK_MONOTONIC, &orig_time);
a655f4cf MD	129	if (ret == -1) {
	130	PERROR("clock_gettime");
	131	return -1;
	132	}
	133
	134	connect_ret = connect(sock->fd,
1a65bbb8 JG	135	(const struct sockaddr *) ALIGNED_CONST_PTR(
	136	sock->sockaddr.addr.sin6),
	137	sizeof(sock->sockaddr.addr.sin6));
	138	if (connect_ret == -1 && errno != EAGAIN && errno != EWOULDBLOCK &&
	139	errno != EINPROGRESS) {
a655f4cf MD	140	goto error;
	141	} else if (!connect_ret) {
	142	/* Connect succeeded */
	143	goto success;
	144	}
	145
48ac9596 JR	146	DBG("Asynchronous connect for sock %d, performing polling with"
	147	" timeout: %lums", sock->fd, timeout);
	148
a655f4cf MD	149	/*
	150	* Perform poll loop following EINPROGRESS recommendation from
	151	* connect(2) man page.
	152	*/
	153	do {
	154	struct pollfd fds;
	155
	156	fds.fd = sock->fd;
	157	fds.events = POLLOUT;
	158	fds.revents = 0;
	159	ret = poll(&fds, 1, RECONNECT_DELAY);
	160	if (ret < 0) {
	161	goto error;
	162	} else if (ret > 0) {
	163	int optval;
	164	socklen_t optval_len = sizeof(optval);
	165
	166	if (!(fds.revents & POLLOUT)) {
	167	/* Either hup or error */
	168	errno = EPIPE;
	169	goto error;
	170	}
	171	/* got something */
	172	ret = getsockopt(sock->fd, SOL_SOCKET,
	173	SO_ERROR, &optval, &optval_len);
	174	if (ret) {
48ac9596	175	PERROR("getsockopt");
a655f4cf MD	176	goto error;
	177	}
	178	if (!optval) {
	179	connect_ret = 0;
	180	goto success;
	181	} else {
48ac9596 JR	182	/* Get actual connect() errno from opt_val */
48ac9596 JR	183	errno = optval;
a655f4cf MD	184	goto error;
	185	}
	186	}
	187	/* ret == 0: timeout */
389fbf04	188	ret = lttng_clock_gettime(CLOCK_MONOTONIC, &cur_time);
a655f4cf MD	189	if (ret == -1) {
	190	PERROR("clock_gettime");
	191	connect_ret = ret;
	192	goto error;
	193	}
2daf6502 MD	194	if (timespec_to_ms(timespec_abs_diff(cur_time, orig_time), &diff_ms) < 0) {
	195	ERR("timespec_to_ms input overflows milliseconds output");
	196	connect_ret = -1;
	197	goto error;
	198	}
	199	} while (diff_ms < timeout);
a655f4cf MD	200
	201	/* Timeout */
	202	errno = ETIMEDOUT;
	203	connect_ret = -1;
	204
	205	success:
	206	/* Restore initial flags */
	207	ret = fcntl(sock->fd, F_SETFL, flags);
	208	if (ret == -1) {
	209	PERROR("fcntl");
	210	/* Continue anyway */
	211	}
	212	error:
	213	return connect_ret;
	214	}
	215
6364a07a DG	216	/*
	217	* Connect PF_INET socket.
	218	*/
90e535ef	219	LTTNG_HIDDEN
6364a07a DG	220	int lttcomm_connect_inet6_sock(struct lttcomm_sock *sock)
	221	{
	222	int ret, closeret;
	223
a655f4cf MD	224	if (lttcomm_get_network_timeout()) {
	225	ret = connect_with_timeout(sock);
	226	} else {
	227	ret = connect_no_timeout(sock);
	228	}
6364a07a	229	if (ret < 0) {
82c05d47	230	PERROR("connect inet6");
6364a07a DG	231	goto error_connect;
	232	}
	233
	234	return ret;
	235
	236	error_connect:
	237	closeret = close(sock->fd);
	238	if (closeret) {
	239	PERROR("close inet6");
	240	}
	241
	242	return ret;
	243	}
	244
	245	/*
	246	* Do an accept(2) on the sock and return the new lttcomm socket. The socket
	247	* MUST be bind(2) before.
	248	*/
90e535ef	249	LTTNG_HIDDEN
6364a07a DG	250	struct lttcomm_sock lttcomm_accept_inet6_sock(struct lttcomm_sock sock)
	251	{
	252	int new_fd;
88a5db70	253	socklen_t len;
6364a07a	254	struct lttcomm_sock *new_sock;
1a65bbb8	255	struct sockaddr_in6 new_addr = {};
6364a07a DG	256
	257	if (sock->proto == LTTCOMM_SOCK_UDP) {
	258	/*
	259	* accept(2) does not exist for UDP so simply return the passed socket.
	260	*/
	261	new_sock = sock;
	262	goto end;
	263	}
	264
de5e9086	265	new_sock = lttcomm_alloc_sock(sock->proto);
6364a07a DG	266	if (new_sock == NULL) {
	267	goto error;
	268	}
	269
1a65bbb8	270	len = sizeof(new_addr);
88a5db70	271
6364a07a	272	/* Blocking call */
1a65bbb8	273	new_fd = accept(sock->fd, (struct sockaddr *) &new_addr, &len);
6364a07a DG	274	if (new_fd < 0) {
	275	PERROR("accept inet6");
	276	goto error;
	277	}
1a65bbb8	278	new_sock->sockaddr.addr.sin6 = new_addr;
6364a07a	279	new_sock->fd = new_fd;
de5e9086	280	new_sock->ops = &inet6_ops;
6364a07a DG	281
	282	end:
	283	return new_sock;
	284
	285	error:
	286	free(new_sock);
	287	return NULL;
	288	}
	289
	290	/*
	291	* Make the socket listen using LTTNG_SESSIOND_COMM_MAX_LISTEN.
	292	*/
90e535ef	293	LTTNG_HIDDEN
6364a07a DG	294	int lttcomm_listen_inet6_sock(struct lttcomm_sock *sock, int backlog)
	295	{
	296	int ret;
	297
	298	if (sock->proto == LTTCOMM_SOCK_UDP) {
	299	/* listen(2) does not exist for UDP so simply return success. */
	300	ret = 0;
	301	goto end;
	302	}
	303
	304	/* Default listen backlog */
	305	if (backlog <= 0) {
	306	backlog = LTTNG_SESSIOND_COMM_MAX_LISTEN;
	307	}
	308
	309	ret = listen(sock->fd, backlog);
	310	if (ret < 0) {
	311	PERROR("listen inet6");
	312	}
	313
	314	end:
	315	return ret;
	316	}
	317
	318	/*
	319	* Receive data of size len in put that data into the buf param. Using recvmsg
	320	* API.
	321	*
	322	* Return the size of received data.
	323	*/
90e535ef	324	LTTNG_HIDDEN
6364a07a DG	325	ssize_t lttcomm_recvmsg_inet6_sock(struct lttcomm_sock sock, void buf,
	326	size_t len, int flags)
	327	{
	328	struct msghdr msg;
	329	struct iovec iov[1];
	330	ssize_t ret = -1;
7c5aef62	331	size_t len_last;
1a65bbb8	332	struct sockaddr_in6 addr = sock->sockaddr.addr.sin6;
6364a07a DG	333
	334	memset(&msg, 0, sizeof(msg));
	335
	336	iov[0].iov_base = buf;
	337	iov[0].iov_len = len;
	338	msg.msg_iov = iov;
	339	msg.msg_iovlen = 1;
	340
1a65bbb8	341	msg.msg_name = (struct sockaddr *) &addr;
6364a07a DG	342	msg.msg_namelen = sizeof(sock->sockaddr.addr.sin6);
6364a07a DG	343
6364a07a	344	do {
7c5aef62	345	len_last = iov[0].iov_len;
6364a07a	346	ret = recvmsg(sock->fd, &msg, flags);
7c5aef62	347	if (ret > 0) {
5312a3ed JG	348	if (flags & MSG_DONTWAIT) {
	349	goto end;
	350	}
7c5aef62 DG	351	iov[0].iov_base += ret;
	352	iov[0].iov_len -= ret;
	353	assert(ret <= len_last);
	354	}
	355	} while ((ret > 0 && ret < len_last) \|\| (ret < 0 && errno == EINTR));
6364a07a	356	if (ret < 0) {
7c5aef62 DG	357	PERROR("recvmsg inet");
	358	} else if (ret > 0) {
	359	ret = len;
6364a07a	360	}
7c5aef62	361	/* Else ret = 0 meaning an orderly shutdown. */
5312a3ed	362	end:
6364a07a DG	363	return ret;
	364	}
	365
	366	/*
	367	* Send buf data of size len. Using sendmsg API.
	368	*
	369	* Return the size of sent data.
	370	*/
90e535ef	371	LTTNG_HIDDEN
c2d69327	372	ssize_t lttcomm_sendmsg_inet6_sock(struct lttcomm_sock sock, const void buf,
6364a07a DG	373	size_t len, int flags)
	374	{
	375	struct msghdr msg;
	376	struct iovec iov[1];
	377	ssize_t ret = -1;
	378
	379	memset(&msg, 0, sizeof(msg));
	380
c2d69327	381	iov[0].iov_base = (void *) buf;
6364a07a DG	382	iov[0].iov_len = len;
	383	msg.msg_iov = iov;
	384	msg.msg_iovlen = 1;
	385
	386	switch (sock->proto) {
	387	case LTTCOMM_SOCK_UDP:
1a65bbb8 JG	388	{
	389	struct sockaddr_in6 addr = sock->sockaddr.addr.sin6;
	390
	391	msg.msg_name = (struct sockaddr *) &addr;
6364a07a DG	392	msg.msg_namelen = sizeof(sock->sockaddr.addr.sin6);
6364a07a DG	393	break;
1a65bbb8	394	}
6364a07a DG	395	default:
	396	break;
	397	}
	398
	399	do {
	400	ret = sendmsg(sock->fd, &msg, flags);
	401	} while (ret < 0 && errno == EINTR);
	402	if (ret < 0) {
	403	/*
	404	* Only warn about EPIPE when quiet mode is deactivated.
	405	* We consider EPIPE as expected.
	406	*/
	407	if (errno != EPIPE \|\| !lttng_opt_quiet) {
	408	PERROR("sendmsg inet6");
	409	}
	410	}
	411
	412	return ret;
	413	}
	414
	415	/*
	416	* Shutdown cleanly and close.
	417	*/
90e535ef	418	LTTNG_HIDDEN
6364a07a DG	419	int lttcomm_close_inet6_sock(struct lttcomm_sock *sock)
6364a07a DG	420	{
6e742359	421	int ret;
6364a07a	422
de5e9086	423	/* Don't try to close an invalid marked socket */
6364a07a DG	424	if (sock->fd == -1) {
	425	return 0;
	426	}
	427
6e742359 DG	428	ret = close(sock->fd);
6e742359 DG	429	if (ret) {
6364a07a DG	430	PERROR("close inet6");
	431	}
	432
	433	/* Mark socket */
	434	sock->fd = -1;
	435
	436	return ret;
	437	}