[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));
}

/*
 * Return time_a - time_b  in milliseconds.
 */
static
unsigned long time_diff_ms(struct timespec *time_a,
		struct timespec *time_b)
{
	time_t sec_diff;
	long nsec_diff;
	unsigned long result_ms;

	sec_diff = time_a->tv_sec - time_b->tv_sec;
	nsec_diff = time_a->tv_nsec - time_b->tv_nsec;

	result_ms = sec_diff * MSEC_PER_SEC;
	result_ms += nsec_diff / NSEC_PER_MSEC;
	return result_ms;
}

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;

	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;
		}
	} while (time_diff_ms(&cur_time, &orig_time) < 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) {
			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. */

	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
	113	/*
	114	* Return time_a - time_b in milliseconds.
	115	*/
	116	static
	117	unsigned long time_diff_ms(struct timespec *time_a,
	118	struct timespec *time_b)
	119	{
	120	time_t sec_diff;
	121	long nsec_diff;
	122	unsigned long result_ms;
	123
	124	sec_diff = time_a->tv_sec - time_b->tv_sec;
	125	nsec_diff = time_a->tv_nsec - time_b->tv_nsec;
	126
	127	result_ms = sec_diff * MSEC_PER_SEC;
	128	result_ms += nsec_diff / NSEC_PER_MSEC;
	129	return result_ms;
	130	}
	131
	132	static
	133	int connect_with_timeout(struct lttcomm_sock *sock)
	134	{
	135	unsigned long timeout = lttcomm_get_network_timeout();
	136	int ret, flags, connect_ret;
	137	struct timespec orig_time, cur_time;
	138
	139	ret = fcntl(sock->fd, F_GETFL, 0);
	140	if (ret == -1) {
	141	PERROR("fcntl");
	142	return -1;
	143	}
	144	flags = ret;
	145
	146	/* Set socket to nonblock */
	147	ret = fcntl(sock->fd, F_SETFL, flags \| O_NONBLOCK);
	148	if (ret == -1) {
	149	PERROR("fcntl");
	150	return -1;
	151	}
	152
389fbf04	153	ret = lttng_clock_gettime(CLOCK_MONOTONIC, &orig_time);
a655f4cf MD	154	if (ret == -1) {
	155	PERROR("clock_gettime");
	156	return -1;
	157	}
	158
	159	connect_ret = connect(sock->fd,
	160	(struct sockaddr *) &sock->sockaddr.addr.sin6,
	161	sizeof(sock->sockaddr.addr.sin6));
	162	if (connect_ret == -1 && errno != EAGAIN
	163	&& errno != EWOULDBLOCK
	164	&& errno != EINPROGRESS) {
	165	goto error;
	166	} else if (!connect_ret) {
	167	/* Connect succeeded */
	168	goto success;
	169	}
	170
48ac9596 JR	171	DBG("Asynchronous connect for sock %d, performing polling with"
	172	" timeout: %lums", sock->fd, timeout);
	173
a655f4cf MD	174	/*
	175	* Perform poll loop following EINPROGRESS recommendation from
	176	* connect(2) man page.
	177	*/
	178	do {
	179	struct pollfd fds;
	180
	181	fds.fd = sock->fd;
	182	fds.events = POLLOUT;
	183	fds.revents = 0;
	184	ret = poll(&fds, 1, RECONNECT_DELAY);
	185	if (ret < 0) {
	186	goto error;
	187	} else if (ret > 0) {
	188	int optval;
	189	socklen_t optval_len = sizeof(optval);
	190
	191	if (!(fds.revents & POLLOUT)) {
	192	/* Either hup or error */
	193	errno = EPIPE;
	194	goto error;
	195	}
	196	/* got something */
	197	ret = getsockopt(sock->fd, SOL_SOCKET,
	198	SO_ERROR, &optval, &optval_len);
	199	if (ret) {
48ac9596	200	PERROR("getsockopt");
a655f4cf MD	201	goto error;
	202	}
	203	if (!optval) {
	204	connect_ret = 0;
	205	goto success;
	206	} else {
48ac9596 JR	207	/* Get actual connect() errno from opt_val */
48ac9596 JR	208	errno = optval;
a655f4cf MD	209	goto error;
	210	}
	211	}
	212	/* ret == 0: timeout */
389fbf04	213	ret = lttng_clock_gettime(CLOCK_MONOTONIC, &cur_time);
a655f4cf MD	214	if (ret == -1) {
	215	PERROR("clock_gettime");
	216	connect_ret = ret;
	217	goto error;
	218	}
	219	} while (time_diff_ms(&cur_time, &orig_time) < timeout);
	220
	221	/* Timeout */
	222	errno = ETIMEDOUT;
	223	connect_ret = -1;
	224
	225	success:
	226	/* Restore initial flags */
	227	ret = fcntl(sock->fd, F_SETFL, flags);
	228	if (ret == -1) {
	229	PERROR("fcntl");
	230	/* Continue anyway */
	231	}
	232	error:
	233	return connect_ret;
	234	}
	235
6364a07a DG	236	/*
	237	* Connect PF_INET socket.
	238	*/
90e535ef	239	LTTNG_HIDDEN
6364a07a DG	240	int lttcomm_connect_inet6_sock(struct lttcomm_sock *sock)
	241	{
	242	int ret, closeret;
	243
a655f4cf MD	244	if (lttcomm_get_network_timeout()) {
	245	ret = connect_with_timeout(sock);
	246	} else {
	247	ret = connect_no_timeout(sock);
	248	}
6364a07a	249	if (ret < 0) {
82c05d47	250	PERROR("connect inet6");
6364a07a DG	251	goto error_connect;
	252	}
	253
	254	return ret;
	255
	256	error_connect:
	257	closeret = close(sock->fd);
	258	if (closeret) {
	259	PERROR("close inet6");
	260	}
	261
	262	return ret;
	263	}
	264
	265	/*
	266	* Do an accept(2) on the sock and return the new lttcomm socket. The socket
	267	* MUST be bind(2) before.
	268	*/
90e535ef	269	LTTNG_HIDDEN
6364a07a DG	270	struct lttcomm_sock lttcomm_accept_inet6_sock(struct lttcomm_sock sock)
	271	{
	272	int new_fd;
88a5db70	273	socklen_t len;
6364a07a DG	274	struct lttcomm_sock *new_sock;
	275
	276	if (sock->proto == LTTCOMM_SOCK_UDP) {
	277	/*
	278	* accept(2) does not exist for UDP so simply return the passed socket.
	279	*/
	280	new_sock = sock;
	281	goto end;
	282	}
	283
de5e9086	284	new_sock = lttcomm_alloc_sock(sock->proto);
6364a07a DG	285	if (new_sock == NULL) {
	286	goto error;
	287	}
	288
88a5db70 DG	289	len = sizeof(new_sock->sockaddr.addr.sin6);
88a5db70 DG	290
6364a07a DG	291	/* Blocking call */
	292	new_fd = accept(sock->fd,
	293	(struct sockaddr *) &new_sock->sockaddr.addr.sin6, &len);
	294	if (new_fd < 0) {
	295	PERROR("accept inet6");
	296	goto error;
	297	}
	298
	299	new_sock->fd = new_fd;
de5e9086	300	new_sock->ops = &inet6_ops;
6364a07a DG	301
	302	end:
	303	return new_sock;
	304
	305	error:
	306	free(new_sock);
	307	return NULL;
	308	}
	309
	310	/*
	311	* Make the socket listen using LTTNG_SESSIOND_COMM_MAX_LISTEN.
	312	*/
90e535ef	313	LTTNG_HIDDEN
6364a07a DG	314	int lttcomm_listen_inet6_sock(struct lttcomm_sock *sock, int backlog)
	315	{
	316	int ret;
	317
	318	if (sock->proto == LTTCOMM_SOCK_UDP) {
	319	/* listen(2) does not exist for UDP so simply return success. */
	320	ret = 0;
	321	goto end;
	322	}
	323
	324	/* Default listen backlog */
	325	if (backlog <= 0) {
	326	backlog = LTTNG_SESSIOND_COMM_MAX_LISTEN;
	327	}
	328
	329	ret = listen(sock->fd, backlog);
	330	if (ret < 0) {
	331	PERROR("listen inet6");
	332	}
	333
	334	end:
	335	return ret;
	336	}
	337
	338	/*
	339	* Receive data of size len in put that data into the buf param. Using recvmsg
	340	* API.
	341	*
	342	* Return the size of received data.
	343	*/
90e535ef	344	LTTNG_HIDDEN
6364a07a DG	345	ssize_t lttcomm_recvmsg_inet6_sock(struct lttcomm_sock sock, void buf,
	346	size_t len, int flags)
	347	{
	348	struct msghdr msg;
	349	struct iovec iov[1];
	350	ssize_t ret = -1;
7c5aef62	351	size_t len_last;
6364a07a DG	352
	353	memset(&msg, 0, sizeof(msg));
	354
	355	iov[0].iov_base = buf;
	356	iov[0].iov_len = len;
	357	msg.msg_iov = iov;
	358	msg.msg_iovlen = 1;
	359
	360	msg.msg_name = (struct sockaddr *) &sock->sockaddr.addr.sin6;
	361	msg.msg_namelen = sizeof(sock->sockaddr.addr.sin6);
	362
6364a07a	363	do {
7c5aef62	364	len_last = iov[0].iov_len;
6364a07a	365	ret = recvmsg(sock->fd, &msg, flags);
7c5aef62 DG	366	if (ret > 0) {
	367	iov[0].iov_base += ret;
	368	iov[0].iov_len -= ret;
	369	assert(ret <= len_last);
	370	}
	371	} while ((ret > 0 && ret < len_last) \|\| (ret < 0 && errno == EINTR));
6364a07a	372	if (ret < 0) {
7c5aef62 DG	373	PERROR("recvmsg inet");
	374	} else if (ret > 0) {
	375	ret = len;
6364a07a	376	}
7c5aef62	377	/* Else ret = 0 meaning an orderly shutdown. */
6364a07a DG	378
	379	return ret;
	380	}
	381
	382	/*
	383	* Send buf data of size len. Using sendmsg API.
	384	*
	385	* Return the size of sent data.
	386	*/
90e535ef	387	LTTNG_HIDDEN
c2d69327	388	ssize_t lttcomm_sendmsg_inet6_sock(struct lttcomm_sock sock, const void buf,
6364a07a DG	389	size_t len, int flags)
	390	{
	391	struct msghdr msg;
	392	struct iovec iov[1];
	393	ssize_t ret = -1;
	394
	395	memset(&msg, 0, sizeof(msg));
	396
c2d69327	397	iov[0].iov_base = (void *) buf;
6364a07a DG	398	iov[0].iov_len = len;
	399	msg.msg_iov = iov;
	400	msg.msg_iovlen = 1;
	401
	402	switch (sock->proto) {
	403	case LTTCOMM_SOCK_UDP:
	404	msg.msg_name = (struct sockaddr *) &sock->sockaddr.addr.sin6;
	405	msg.msg_namelen = sizeof(sock->sockaddr.addr.sin6);
	406	break;
	407	default:
	408	break;
	409	}
	410
	411	do {
	412	ret = sendmsg(sock->fd, &msg, flags);
	413	} while (ret < 0 && errno == EINTR);
	414	if (ret < 0) {
	415	/*
	416	* Only warn about EPIPE when quiet mode is deactivated.
	417	* We consider EPIPE as expected.
	418	*/
	419	if (errno != EPIPE \|\| !lttng_opt_quiet) {
	420	PERROR("sendmsg inet6");
	421	}
	422	}
	423
	424	return ret;
	425	}
	426
	427	/*
	428	* Shutdown cleanly and close.
	429	*/
90e535ef	430	LTTNG_HIDDEN
6364a07a DG	431	int lttcomm_close_inet6_sock(struct lttcomm_sock *sock)
6364a07a DG	432	{
6e742359	433	int ret;
6364a07a	434
de5e9086	435	/* Don't try to close an invalid marked socket */
6364a07a DG	436	if (sock->fd == -1) {
	437	return 0;
	438	}
	439
6e742359 DG	440	ret = close(sock->fd);
6e742359 DG	441	if (ret) {
6364a07a DG	442	PERROR("close inet6");
	443	}
	444
	445	/* Mark socket */
	446	sock->fd = -1;
	447
	448	return ret;
	449	}