[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)
{
	int ret;

	ret = bind(sock->fd, (const struct sockaddr *) ALIGNED_CONST_PTR(
			sock->sockaddr.addr.sin6),
			sizeof(sock->sockaddr.addr.sin6));
	if (ret < 0) {
		PERROR("bind inet6");
	}

	return ret;
}

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) {
			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:
	{
		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 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)
	100	{
	101	int ret;
	102
e909777b JG	103	ret = bind(sock->fd, (const struct sockaddr *) ALIGNED_CONST_PTR(
e909777b JG	104	sock->sockaddr.addr.sin6),
6364a07a DG	105	sizeof(sock->sockaddr.addr.sin6));
	106	if (ret < 0) {
	107	PERROR("bind inet6");
	108	}
	109
	110	return ret;
	111	}
	112
a655f4cf MD	113	static
	114	int connect_no_timeout(struct lttcomm_sock *sock)
	115	{
e909777b JG	116	return connect(sock->fd,
	117	(const struct sockaddr *) ALIGNED_CONST_PTR(
	118	sock->sockaddr.addr.sin6),
a655f4cf MD	119	sizeof(sock->sockaddr.addr.sin6));
	120	}
	121
a655f4cf MD	122	static
	123	int connect_with_timeout(struct lttcomm_sock *sock)
	124	{
	125	unsigned long timeout = lttcomm_get_network_timeout();
	126	int ret, flags, connect_ret;
	127	struct timespec orig_time, cur_time;
f6739b01	128	unsigned long diff_ms;
a655f4cf MD	129
	130	ret = fcntl(sock->fd, F_GETFL, 0);
	131	if (ret == -1) {
	132	PERROR("fcntl");
	133	return -1;
	134	}
	135	flags = ret;
	136
	137	/* Set socket to nonblock */
	138	ret = fcntl(sock->fd, F_SETFL, flags \| O_NONBLOCK);
	139	if (ret == -1) {
	140	PERROR("fcntl");
	141	return -1;
	142	}
	143
389fbf04	144	ret = lttng_clock_gettime(CLOCK_MONOTONIC, &orig_time);
a655f4cf MD	145	if (ret == -1) {
	146	PERROR("clock_gettime");
	147	return -1;
	148	}
	149
	150	connect_ret = connect(sock->fd,
e909777b JG	151	(const struct sockaddr *) ALIGNED_CONST_PTR(
	152	sock->sockaddr.addr.sin6),
	153	sizeof(sock->sockaddr.addr.sin6));
	154	if (connect_ret == -1 && errno != EAGAIN && errno != EWOULDBLOCK &&
	155	errno != EINPROGRESS) {
a655f4cf MD	156	goto error;
	157	} else if (!connect_ret) {
	158	/* Connect succeeded */
	159	goto success;
	160	}
	161
40bb1b2a JR	162	DBG("Asynchronous connect for sock %d, performing polling with"
	163	" timeout: %lums", sock->fd, timeout);
	164
a655f4cf MD	165	/*
	166	* Perform poll loop following EINPROGRESS recommendation from
	167	* connect(2) man page.
	168	*/
	169	do {
	170	struct pollfd fds;
	171
	172	fds.fd = sock->fd;
	173	fds.events = POLLOUT;
	174	fds.revents = 0;
	175	ret = poll(&fds, 1, RECONNECT_DELAY);
	176	if (ret < 0) {
	177	goto error;
	178	} else if (ret > 0) {
	179	int optval;
	180	socklen_t optval_len = sizeof(optval);
	181
	182	if (!(fds.revents & POLLOUT)) {
	183	/* Either hup or error */
	184	errno = EPIPE;
	185	goto error;
	186	}
	187	/* got something */
	188	ret = getsockopt(sock->fd, SOL_SOCKET,
	189	SO_ERROR, &optval, &optval_len);
	190	if (ret) {
40bb1b2a	191	PERROR("getsockopt");
a655f4cf MD	192	goto error;
	193	}
	194	if (!optval) {
	195	connect_ret = 0;
	196	goto success;
	197	} else {
40bb1b2a JR	198	/* Get actual connect() errno from opt_val */
40bb1b2a JR	199	errno = optval;
a655f4cf MD	200	goto error;
	201	}
	202	}
	203	/* ret == 0: timeout */
389fbf04	204	ret = lttng_clock_gettime(CLOCK_MONOTONIC, &cur_time);
a655f4cf MD	205	if (ret == -1) {
	206	PERROR("clock_gettime");
	207	connect_ret = ret;
	208	goto error;
	209	}
f6739b01 MD	210	if (timespec_to_ms(timespec_abs_diff(cur_time, orig_time), &diff_ms) < 0) {
	211	ERR("timespec_to_ms input overflows milliseconds output");
	212	connect_ret = -1;
	213	goto error;
	214	}
	215	} while (diff_ms < timeout);
a655f4cf MD	216
	217	/* Timeout */
	218	errno = ETIMEDOUT;
	219	connect_ret = -1;
	220
	221	success:
	222	/* Restore initial flags */
	223	ret = fcntl(sock->fd, F_SETFL, flags);
	224	if (ret == -1) {
	225	PERROR("fcntl");
	226	/* Continue anyway */
	227	}
	228	error:
	229	return connect_ret;
	230	}
	231
6364a07a DG	232	/*
	233	* Connect PF_INET socket.
	234	*/
90e535ef	235	LTTNG_HIDDEN
6364a07a DG	236	int lttcomm_connect_inet6_sock(struct lttcomm_sock *sock)
	237	{
	238	int ret, closeret;
	239
a655f4cf MD	240	if (lttcomm_get_network_timeout()) {
	241	ret = connect_with_timeout(sock);
	242	} else {
	243	ret = connect_no_timeout(sock);
	244	}
6364a07a	245	if (ret < 0) {
82c05d47	246	PERROR("connect inet6");
6364a07a DG	247	goto error_connect;
	248	}
	249
	250	return ret;
	251
	252	error_connect:
	253	closeret = close(sock->fd);
	254	if (closeret) {
	255	PERROR("close inet6");
	256	}
	257
	258	return ret;
	259	}
	260
	261	/*
	262	* Do an accept(2) on the sock and return the new lttcomm socket. The socket
	263	* MUST be bind(2) before.
	264	*/
90e535ef	265	LTTNG_HIDDEN
6364a07a DG	266	struct lttcomm_sock lttcomm_accept_inet6_sock(struct lttcomm_sock sock)
	267	{
	268	int new_fd;
88a5db70	269	socklen_t len;
6364a07a	270	struct lttcomm_sock *new_sock;
e909777b	271	struct sockaddr_in6 new_addr = {};
6364a07a DG	272
	273	if (sock->proto == LTTCOMM_SOCK_UDP) {
	274	/*
	275	* accept(2) does not exist for UDP so simply return the passed socket.
	276	*/
	277	new_sock = sock;
	278	goto end;
	279	}
	280
de5e9086	281	new_sock = lttcomm_alloc_sock(sock->proto);
6364a07a DG	282	if (new_sock == NULL) {
	283	goto error;
	284	}
	285
e909777b	286	len = sizeof(new_addr);
88a5db70	287
6364a07a	288	/* Blocking call */
e909777b	289	new_fd = accept(sock->fd, (struct sockaddr *) &new_addr, &len);
6364a07a DG	290	if (new_fd < 0) {
	291	PERROR("accept inet6");
	292	goto error;
	293	}
e909777b	294	new_sock->sockaddr.addr.sin6 = new_addr;
6364a07a	295	new_sock->fd = new_fd;
de5e9086	296	new_sock->ops = &inet6_ops;
6364a07a DG	297
	298	end:
	299	return new_sock;
	300
	301	error:
	302	free(new_sock);
	303	return NULL;
	304	}
	305
	306	/*
	307	* Make the socket listen using LTTNG_SESSIOND_COMM_MAX_LISTEN.
	308	*/
90e535ef	309	LTTNG_HIDDEN
6364a07a DG	310	int lttcomm_listen_inet6_sock(struct lttcomm_sock *sock, int backlog)
	311	{
	312	int ret;
	313
	314	if (sock->proto == LTTCOMM_SOCK_UDP) {
	315	/* listen(2) does not exist for UDP so simply return success. */
	316	ret = 0;
	317	goto end;
	318	}
	319
	320	/* Default listen backlog */
	321	if (backlog <= 0) {
	322	backlog = LTTNG_SESSIOND_COMM_MAX_LISTEN;
	323	}
	324
	325	ret = listen(sock->fd, backlog);
	326	if (ret < 0) {
	327	PERROR("listen inet6");
	328	}
	329
	330	end:
	331	return ret;
	332	}
	333
	334	/*
	335	* Receive data of size len in put that data into the buf param. Using recvmsg
	336	* API.
	337	*
	338	* Return the size of received data.
	339	*/
90e535ef	340	LTTNG_HIDDEN
6364a07a DG	341	ssize_t lttcomm_recvmsg_inet6_sock(struct lttcomm_sock sock, void buf,
	342	size_t len, int flags)
	343	{
	344	struct msghdr msg;
	345	struct iovec iov[1];
	346	ssize_t ret = -1;
7c5aef62	347	size_t len_last;
e909777b	348	struct sockaddr_in6 addr = sock->sockaddr.addr.sin6;
6364a07a DG	349
	350	memset(&msg, 0, sizeof(msg));
	351
	352	iov[0].iov_base = buf;
	353	iov[0].iov_len = len;
	354	msg.msg_iov = iov;
	355	msg.msg_iovlen = 1;
	356
e909777b	357	msg.msg_name = (struct sockaddr *) &addr;
6364a07a DG	358	msg.msg_namelen = sizeof(sock->sockaddr.addr.sin6);
6364a07a DG	359
6364a07a	360	do {
7c5aef62	361	len_last = iov[0].iov_len;
6364a07a	362	ret = recvmsg(sock->fd, &msg, flags);
7c5aef62 DG	363	if (ret > 0) {
	364	iov[0].iov_base += ret;
	365	iov[0].iov_len -= ret;
	366	assert(ret <= len_last);
	367	}
	368	} while ((ret > 0 && ret < len_last) \|\| (ret < 0 && errno == EINTR));
6364a07a	369	if (ret < 0) {
7c5aef62 DG	370	PERROR("recvmsg inet");
	371	} else if (ret > 0) {
	372	ret = len;
6364a07a	373	}
7c5aef62	374	/* Else ret = 0 meaning an orderly shutdown. */
6364a07a DG	375
	376	return ret;
	377	}
	378
	379	/*
	380	* Send buf data of size len. Using sendmsg API.
	381	*
	382	* Return the size of sent data.
	383	*/
90e535ef	384	LTTNG_HIDDEN
c2d69327	385	ssize_t lttcomm_sendmsg_inet6_sock(struct lttcomm_sock sock, const void buf,
6364a07a DG	386	size_t len, int flags)
	387	{
	388	struct msghdr msg;
	389	struct iovec iov[1];
	390	ssize_t ret = -1;
	391
	392	memset(&msg, 0, sizeof(msg));
	393
c2d69327	394	iov[0].iov_base = (void *) buf;
6364a07a DG	395	iov[0].iov_len = len;
	396	msg.msg_iov = iov;
	397	msg.msg_iovlen = 1;
	398
	399	switch (sock->proto) {
	400	case LTTCOMM_SOCK_UDP:
e909777b JG	401	{
	402	struct sockaddr_in6 addr = sock->sockaddr.addr.sin6;
	403
	404	msg.msg_name = (struct sockaddr *) &addr;
6364a07a DG	405	msg.msg_namelen = sizeof(sock->sockaddr.addr.sin6);
6364a07a DG	406	break;
e909777b	407	}
6364a07a DG	408	default:
	409	break;
	410	}
	411
	412	do {
	413	ret = sendmsg(sock->fd, &msg, flags);
	414	} while (ret < 0 && errno == EINTR);
	415	if (ret < 0) {
	416	/*
	417	* Only warn about EPIPE when quiet mode is deactivated.
	418	* We consider EPIPE as expected.
	419	*/
	420	if (errno != EPIPE \|\| !lttng_opt_quiet) {
	421	PERROR("sendmsg inet6");
	422	}
	423	}
	424
	425	return ret;
	426	}
	427
	428	/*
	429	* Shutdown cleanly and close.
	430	*/
90e535ef	431	LTTNG_HIDDEN
6364a07a DG	432	int lttcomm_close_inet6_sock(struct lttcomm_sock *sock)
6364a07a DG	433	{
6e742359	434	int ret;
6364a07a	435
de5e9086	436	/* Don't try to close an invalid marked socket */
6364a07a DG	437	if (sock->fd == -1) {
	438	return 0;
	439	}
	440
6e742359 DG	441	ret = close(sock->fd);
6e742359 DG	442	if (ret) {
6364a07a DG	443	PERROR("close inet6");
	444	}
	445
	446	/* Mark socket */
	447	sock->fd = -1;
	448
	449	return ret;
	450	}