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

/*
 * 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 _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 <errno.h>
#include <fcntl.h>
#include <common/compat/time.h>
#include <poll.h>

#include <common/common.h>
#include <common/time.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 *) &sock->sockaddr.addr.sin6,
			sizeof(sock->sockaddr.addr.sin6));
}

static
int connect_no_timeout(struct lttcomm_sock *sock)
{
	return connect(sock->fd, (struct sockaddr *) &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,
		(struct sockaddr *) &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;

	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_sock->sockaddr.addr.sin6);

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

	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;

	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.sin6;
	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:
		msg.msg_name = (struct sockaddr *) &sock->sockaddr.addr.sin6;
		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 DG	1	/*
	2	* Copyright (C) 2012 - David Goulet <dgoulet@efficios.com>
	3	*
	4	* This program is free software; you can redistribute it and/or modify it
	5	* under the terms of the GNU General Public License, version 2 only, as
	6	* published by the Free Software Foundation.
	7	*
	8	* This program is distributed in the hope that it will be useful, but WITHOUT
	9	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
	10	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
	11	* more details.
	12	*
	13	* You should have received a copy of the GNU General Public License along with
	14	* this program; if not, write to the Free Software Foundation, Inc., 51
	15	* Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
	16	*/
	17
6c1c0768	18	#define _LGPL_SOURCE
6364a07a DG	19	#include <assert.h>
	20	#include <limits.h>
	21	#include <stdio.h>
	22	#include <stdlib.h>
	23	#include <string.h>
	24	#include <sys/stat.h>
	25	#include <sys/types.h>
	26	#include <unistd.h>
	27	#include <errno.h>
a655f4cf	28	#include <fcntl.h>
389fbf04	29	#include <common/compat/time.h>
a655f4cf	30	#include <poll.h>
6364a07a	31
90e535ef	32	#include <common/common.h>
395d6b02	33	#include <common/time.h>
6364a07a DG	34
	35	#include "inet6.h"
	36
a655f4cf MD	37	#define RECONNECT_DELAY 200 /* ms */
a655f4cf MD	38
6364a07a DG	39	/*
	40	* INET protocol operations.
	41	*/
	42	static const struct lttcomm_proto_ops inet6_ops = {
	43	.bind = lttcomm_bind_inet6_sock,
	44	.close = lttcomm_close_inet6_sock,
	45	.connect = lttcomm_connect_inet6_sock,
	46	.accept = lttcomm_accept_inet6_sock,
	47	.listen = lttcomm_listen_inet6_sock,
	48	.recvmsg = lttcomm_recvmsg_inet6_sock,
	49	.sendmsg = lttcomm_sendmsg_inet6_sock,
	50	};
	51
	52	/*
	53	* Creates an PF_INET socket.
	54	*/
90e535ef	55	LTTNG_HIDDEN
6364a07a DG	56	int lttcomm_create_inet6_sock(struct lttcomm_sock *sock, int type, int proto)
6364a07a DG	57	{
de5e9086	58	int val = 1, ret;
783a3b9a	59	unsigned long timeout;
6364a07a DG	60
6364a07a DG	61	/* Create server socket */
7b43086d	62	if ((sock->fd = socket(PF_INET6, type, proto)) < 0) {
6364a07a DG	63	PERROR("socket inet6");
	64	goto error;
	65	}
	66
	67	sock->ops = &inet6_ops;
	68
	69	/*
	70	* Set socket option to reuse the address.
	71	*/
	72	ret = setsockopt(sock->fd, SOL_SOCKET, SO_REUSEADDR, &val, sizeof(int));
	73	if (ret < 0) {
	74	PERROR("setsockopt inet6");
	75	goto error;
	76	}
783a3b9a MD	77	timeout = lttcomm_get_network_timeout();
	78	if (timeout) {
	79	ret = lttcomm_setsockopt_rcv_timeout(sock->fd, timeout);
	80	if (ret) {
	81	goto error;
	82	}
	83	ret = lttcomm_setsockopt_snd_timeout(sock->fd, timeout);
	84	if (ret) {
	85	goto error;
	86	}
	87	}
6364a07a DG	88
	89	return 0;
	90
	91	error:
	92	return -1;
	93	}
	94
	95	/*
	96	* Bind socket and return.
	97	*/
90e535ef	98	LTTNG_HIDDEN
6364a07a DG	99	int lttcomm_bind_inet6_sock(struct lttcomm_sock *sock)
6364a07a DG	100	{
2288467f JG	101	return bind(sock->fd,
2288467f JG	102	(const struct sockaddr *) &sock->sockaddr.addr.sin6,
6364a07a	103	sizeof(sock->sockaddr.addr.sin6));
6364a07a DG	104	}
6364a07a DG	105
a655f4cf MD	106	static
	107	int connect_no_timeout(struct lttcomm_sock *sock)
	108	{
	109	return connect(sock->fd, (struct sockaddr *) &sock->sockaddr.addr.sin6,
	110	sizeof(sock->sockaddr.addr.sin6));
	111	}
	112
a655f4cf MD	113	static
	114	int connect_with_timeout(struct lttcomm_sock *sock)
	115	{
	116	unsigned long timeout = lttcomm_get_network_timeout();
	117	int ret, flags, connect_ret;
	118	struct timespec orig_time, cur_time;
2daf6502	119	unsigned long diff_ms;
a655f4cf MD	120
	121	ret = fcntl(sock->fd, F_GETFL, 0);
	122	if (ret == -1) {
	123	PERROR("fcntl");
	124	return -1;
	125	}
	126	flags = ret;
	127
	128	/* Set socket to nonblock */
	129	ret = fcntl(sock->fd, F_SETFL, flags \| O_NONBLOCK);
	130	if (ret == -1) {
	131	PERROR("fcntl");
	132	return -1;
	133	}
	134
389fbf04	135	ret = lttng_clock_gettime(CLOCK_MONOTONIC, &orig_time);
a655f4cf MD	136	if (ret == -1) {
	137	PERROR("clock_gettime");
	138	return -1;
	139	}
	140
	141	connect_ret = connect(sock->fd,
	142	(struct sockaddr *) &sock->sockaddr.addr.sin6,
	143	sizeof(sock->sockaddr.addr.sin6));
	144	if (connect_ret == -1 && errno != EAGAIN
	145	&& errno != EWOULDBLOCK
	146	&& errno != EINPROGRESS) {
	147	goto error;
	148	} else if (!connect_ret) {
	149	/* Connect succeeded */
	150	goto success;
	151	}
	152
48ac9596 JR	153	DBG("Asynchronous connect for sock %d, performing polling with"
	154	" timeout: %lums", sock->fd, timeout);
	155
a655f4cf MD	156	/*
	157	* Perform poll loop following EINPROGRESS recommendation from
	158	* connect(2) man page.
	159	*/
	160	do {
	161	struct pollfd fds;
	162
	163	fds.fd = sock->fd;
	164	fds.events = POLLOUT;
	165	fds.revents = 0;
	166	ret = poll(&fds, 1, RECONNECT_DELAY);
	167	if (ret < 0) {
	168	goto error;
	169	} else if (ret > 0) {
	170	int optval;
	171	socklen_t optval_len = sizeof(optval);
	172
	173	if (!(fds.revents & POLLOUT)) {
	174	/* Either hup or error */
	175	errno = EPIPE;
	176	goto error;
	177	}
	178	/* got something */
	179	ret = getsockopt(sock->fd, SOL_SOCKET,
	180	SO_ERROR, &optval, &optval_len);
	181	if (ret) {
48ac9596	182	PERROR("getsockopt");
a655f4cf MD	183	goto error;
	184	}
	185	if (!optval) {
	186	connect_ret = 0;
	187	goto success;
	188	} else {
48ac9596 JR	189	/* Get actual connect() errno from opt_val */
48ac9596 JR	190	errno = optval;
a655f4cf MD	191	goto error;
	192	}
	193	}
	194	/* ret == 0: timeout */
389fbf04	195	ret = lttng_clock_gettime(CLOCK_MONOTONIC, &cur_time);
a655f4cf MD	196	if (ret == -1) {
	197	PERROR("clock_gettime");
	198	connect_ret = ret;
	199	goto error;
	200	}
2daf6502 MD	201	if (timespec_to_ms(timespec_abs_diff(cur_time, orig_time), &diff_ms) < 0) {
	202	ERR("timespec_to_ms input overflows milliseconds output");
	203	connect_ret = -1;
	204	goto error;
	205	}
	206	} while (diff_ms < timeout);
a655f4cf MD	207
	208	/* Timeout */
	209	errno = ETIMEDOUT;
	210	connect_ret = -1;
	211
	212	success:
	213	/* Restore initial flags */
	214	ret = fcntl(sock->fd, F_SETFL, flags);
	215	if (ret == -1) {
	216	PERROR("fcntl");
	217	/* Continue anyway */
	218	}
	219	error:
	220	return connect_ret;
	221	}
	222
6364a07a DG	223	/*
	224	* Connect PF_INET socket.
	225	*/
90e535ef	226	LTTNG_HIDDEN
6364a07a DG	227	int lttcomm_connect_inet6_sock(struct lttcomm_sock *sock)
	228	{
	229	int ret, closeret;
	230
a655f4cf MD	231	if (lttcomm_get_network_timeout()) {
	232	ret = connect_with_timeout(sock);
	233	} else {
	234	ret = connect_no_timeout(sock);
	235	}
6364a07a	236	if (ret < 0) {
82c05d47	237	PERROR("connect inet6");
6364a07a DG	238	goto error_connect;
	239	}
	240
	241	return ret;
	242
	243	error_connect:
	244	closeret = close(sock->fd);
	245	if (closeret) {
	246	PERROR("close inet6");
	247	}
	248
	249	return ret;
	250	}
	251
	252	/*
	253	* Do an accept(2) on the sock and return the new lttcomm socket. The socket
	254	* MUST be bind(2) before.
	255	*/
90e535ef	256	LTTNG_HIDDEN
6364a07a DG	257	struct lttcomm_sock lttcomm_accept_inet6_sock(struct lttcomm_sock sock)
	258	{
	259	int new_fd;
88a5db70	260	socklen_t len;
6364a07a DG	261	struct lttcomm_sock *new_sock;
	262
	263	if (sock->proto == LTTCOMM_SOCK_UDP) {
	264	/*
	265	* accept(2) does not exist for UDP so simply return the passed socket.
	266	*/
	267	new_sock = sock;
	268	goto end;
	269	}
	270
de5e9086	271	new_sock = lttcomm_alloc_sock(sock->proto);
6364a07a DG	272	if (new_sock == NULL) {
	273	goto error;
	274	}
	275
88a5db70 DG	276	len = sizeof(new_sock->sockaddr.addr.sin6);
88a5db70 DG	277
6364a07a DG	278	/* Blocking call */
	279	new_fd = accept(sock->fd,
	280	(struct sockaddr *) &new_sock->sockaddr.addr.sin6, &len);
	281	if (new_fd < 0) {
	282	PERROR("accept inet6");
	283	goto error;
	284	}
	285
	286	new_sock->fd = new_fd;
de5e9086	287	new_sock->ops = &inet6_ops;
6364a07a DG	288
	289	end:
	290	return new_sock;
	291
	292	error:
	293	free(new_sock);
	294	return NULL;
	295	}
	296
	297	/*
	298	* Make the socket listen using LTTNG_SESSIOND_COMM_MAX_LISTEN.
	299	*/
90e535ef	300	LTTNG_HIDDEN
6364a07a DG	301	int lttcomm_listen_inet6_sock(struct lttcomm_sock *sock, int backlog)
	302	{
	303	int ret;
	304
	305	if (sock->proto == LTTCOMM_SOCK_UDP) {
	306	/* listen(2) does not exist for UDP so simply return success. */
	307	ret = 0;
	308	goto end;
	309	}
	310
	311	/* Default listen backlog */
	312	if (backlog <= 0) {
	313	backlog = LTTNG_SESSIOND_COMM_MAX_LISTEN;
	314	}
	315
	316	ret = listen(sock->fd, backlog);
	317	if (ret < 0) {
	318	PERROR("listen inet6");
	319	}
	320
	321	end:
	322	return ret;
	323	}
	324
	325	/*
	326	* Receive data of size len in put that data into the buf param. Using recvmsg
	327	* API.
	328	*
	329	* Return the size of received data.
	330	*/
90e535ef	331	LTTNG_HIDDEN
6364a07a DG	332	ssize_t lttcomm_recvmsg_inet6_sock(struct lttcomm_sock sock, void buf,
	333	size_t len, int flags)
	334	{
	335	struct msghdr msg;
	336	struct iovec iov[1];
	337	ssize_t ret = -1;
7c5aef62	338	size_t len_last;
6364a07a DG	339
	340	memset(&msg, 0, sizeof(msg));
	341
	342	iov[0].iov_base = buf;
	343	iov[0].iov_len = len;
	344	msg.msg_iov = iov;
	345	msg.msg_iovlen = 1;
	346
	347	msg.msg_name = (struct sockaddr *) &sock->sockaddr.addr.sin6;
	348	msg.msg_namelen = sizeof(sock->sockaddr.addr.sin6);
	349
6364a07a	350	do {
7c5aef62	351	len_last = iov[0].iov_len;
6364a07a	352	ret = recvmsg(sock->fd, &msg, flags);
7c5aef62	353	if (ret > 0) {
5312a3ed JG	354	if (flags & MSG_DONTWAIT) {
	355	goto end;
	356	}
7c5aef62 DG	357	iov[0].iov_base += ret;
	358	iov[0].iov_len -= ret;
	359	assert(ret <= len_last);
	360	}
	361	} while ((ret > 0 && ret < len_last) \|\| (ret < 0 && errno == EINTR));
6364a07a	362	if (ret < 0) {
7c5aef62 DG	363	PERROR("recvmsg inet");
	364	} else if (ret > 0) {
	365	ret = len;
6364a07a	366	}
7c5aef62	367	/* Else ret = 0 meaning an orderly shutdown. */
5312a3ed	368	end:
6364a07a DG	369	return ret;
	370	}
	371
	372	/*
	373	* Send buf data of size len. Using sendmsg API.
	374	*
	375	* Return the size of sent data.
	376	*/
90e535ef	377	LTTNG_HIDDEN
c2d69327	378	ssize_t lttcomm_sendmsg_inet6_sock(struct lttcomm_sock sock, const void buf,
6364a07a DG	379	size_t len, int flags)
	380	{
	381	struct msghdr msg;
	382	struct iovec iov[1];
	383	ssize_t ret = -1;
	384
	385	memset(&msg, 0, sizeof(msg));
	386
c2d69327	387	iov[0].iov_base = (void *) buf;
6364a07a DG	388	iov[0].iov_len = len;
	389	msg.msg_iov = iov;
	390	msg.msg_iovlen = 1;
	391
	392	switch (sock->proto) {
	393	case LTTCOMM_SOCK_UDP:
	394	msg.msg_name = (struct sockaddr *) &sock->sockaddr.addr.sin6;
	395	msg.msg_namelen = sizeof(sock->sockaddr.addr.sin6);
	396	break;
	397	default:
	398	break;
	399	}
	400
	401	do {
	402	ret = sendmsg(sock->fd, &msg, flags);
	403	} while (ret < 0 && errno == EINTR);
	404	if (ret < 0) {
	405	/*
	406	* Only warn about EPIPE when quiet mode is deactivated.
	407	* We consider EPIPE as expected.
	408	*/
	409	if (errno != EPIPE \|\| !lttng_opt_quiet) {
	410	PERROR("sendmsg inet6");
	411	}
	412	}
	413
	414	return ret;
	415	}
	416
	417	/*
	418	* Shutdown cleanly and close.
	419	*/
90e535ef	420	LTTNG_HIDDEN
6364a07a DG	421	int lttcomm_close_inet6_sock(struct lttcomm_sock *sock)
6364a07a DG	422	{
6e742359	423	int ret;
6364a07a	424
de5e9086	425	/* Don't try to close an invalid marked socket */
6364a07a DG	426	if (sock->fd == -1) {
	427	return 0;
	428	}
	429
6e742359 DG	430	ret = close(sock->fd);
6e742359 DG	431	if (ret) {
6364a07a DG	432	PERROR("close inet6");
	433	}
	434
	435	/* Mark socket */
	436	sock->fd = -1;
	437
	438	return ret;
	439	}