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

/*
 * Copyright (C) 2011 David Goulet <david.goulet@polymtl.ca>
 * Copyright (C) 2011 Mathieu Desnoyers <mathieu.desnoyers@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 <errno.h>
#include <inttypes.h>

#include <common/common.h>

#include "sessiond-comm.h"

/* For Unix socket */
#include <common/unix.h>
/* For Inet socket */
#include "inet.h"
/* For Inet6 socket */
#include "inet6.h"

#define NETWORK_TIMEOUT_ENV	"LTTNG_NETWORK_SOCKET_TIMEOUT"

static struct lttcomm_net_family net_families[] = {
	{ LTTCOMM_INET, lttcomm_create_inet_sock },
	{ LTTCOMM_INET6, lttcomm_create_inet6_sock },
};

/*
 * Human readable error message.
 */
static const char *lttcomm_readable_code[] = {
	[ LTTCOMM_ERR_INDEX(LTTCOMM_CONSUMERD_COMMAND_SOCK_READY) ] = "consumerd command socket ready",
	[ LTTCOMM_ERR_INDEX(LTTCOMM_CONSUMERD_SUCCESS_RECV_FD) ] = "consumerd success on receiving fds",
	[ LTTCOMM_ERR_INDEX(LTTCOMM_CONSUMERD_ERROR_RECV_FD) ] = "consumerd error on receiving fds",
	[ LTTCOMM_ERR_INDEX(LTTCOMM_CONSUMERD_ERROR_RECV_CMD) ] = "consumerd error on receiving command",
	[ LTTCOMM_ERR_INDEX(LTTCOMM_CONSUMERD_POLL_ERROR) ] = "consumerd error in polling thread",
	[ LTTCOMM_ERR_INDEX(LTTCOMM_CONSUMERD_POLL_NVAL) ] = "consumerd polling on closed fd",
	[ LTTCOMM_ERR_INDEX(LTTCOMM_CONSUMERD_POLL_HUP) ] = "consumerd all fd hung up",
	[ LTTCOMM_ERR_INDEX(LTTCOMM_CONSUMERD_EXIT_SUCCESS) ] = "consumerd exiting normally",
	[ LTTCOMM_ERR_INDEX(LTTCOMM_CONSUMERD_EXIT_FAILURE) ] = "consumerd exiting on error",
	[ LTTCOMM_ERR_INDEX(LTTCOMM_CONSUMERD_OUTFD_ERROR) ] = "consumerd error opening the tracefile",
	[ LTTCOMM_ERR_INDEX(LTTCOMM_CONSUMERD_SPLICE_EBADF) ] = "consumerd splice EBADF",
	[ LTTCOMM_ERR_INDEX(LTTCOMM_CONSUMERD_SPLICE_EINVAL) ] = "consumerd splice EINVAL",
	[ LTTCOMM_ERR_INDEX(LTTCOMM_CONSUMERD_SPLICE_ENOMEM) ] = "consumerd splice ENOMEM",
	[ LTTCOMM_ERR_INDEX(LTTCOMM_CONSUMERD_SPLICE_ESPIPE) ] = "consumerd splice ESPIPE",
	[ LTTCOMM_ERR_INDEX(LTTCOMM_CONSUMERD_ENOMEM) ] = "Consumer is out of memory",
	[ LTTCOMM_ERR_INDEX(LTTCOMM_CONSUMERD_ERROR_METADATA) ] = "Error with metadata",
	[ LTTCOMM_ERR_INDEX(LTTCOMM_CONSUMERD_FATAL) ] = "Fatal error",
	[ LTTCOMM_ERR_INDEX(LTTCOMM_CONSUMERD_RELAYD_FAIL) ] = "Error on remote relayd",

	/* Last element */
	[ LTTCOMM_ERR_INDEX(LTTCOMM_NR) ] = "Unknown error code"
};

static unsigned long network_timeout;

/*
 * Return ptr to string representing a human readable error code from the
 * lttcomm_return_code enum.
 *
 * These code MUST be negative in other to treat that as an error value.
 */
LTTNG_HIDDEN
const char *lttcomm_get_readable_code(enum lttcomm_return_code code)
{
	code = -code;

	if (code < LTTCOMM_CONSUMERD_COMMAND_SOCK_READY || code > LTTCOMM_NR) {
		code = LTTCOMM_NR;
	}

	return lttcomm_readable_code[LTTCOMM_ERR_INDEX(code)];
}

/*
 * Create socket from an already allocated lttcomm socket structure and init
 * sockaddr in the lttcomm sock.
 */
LTTNG_HIDDEN
int lttcomm_create_sock(struct lttcomm_sock *sock)
{
	int ret, _sock_type, _sock_proto, domain;

	assert(sock);

	domain = sock->sockaddr.type;
	if (domain != LTTCOMM_INET && domain != LTTCOMM_INET6) {
		ERR("Create socket of unknown domain %d", domain);
		ret = -1;
		goto error;
	}

	switch (sock->proto) {
	case LTTCOMM_SOCK_UDP:
		_sock_type = SOCK_DGRAM;
		_sock_proto = IPPROTO_UDP;
		break;
	case LTTCOMM_SOCK_TCP:
		_sock_type = SOCK_STREAM;
		_sock_proto = IPPROTO_TCP;
		break;
	default:
		ret = -1;
		goto error;
	}

	ret = net_families[domain].create(sock, _sock_type, _sock_proto);
	if (ret < 0) {
		goto error;
	}

error:
	return ret;
}

/*
 * Return allocated lttcomm socket structure.
 */
LTTNG_HIDDEN
struct lttcomm_sock *lttcomm_alloc_sock(enum lttcomm_sock_proto proto)
{
	struct lttcomm_sock *sock;

	sock = zmalloc(sizeof(struct lttcomm_sock));
	if (sock == NULL) {
		PERROR("zmalloc create sock");
		goto end;
	}

	sock->proto = proto;
	sock->fd = -1;

end:
	return sock;
}

/*
 * Return an allocated lttcomm socket structure and copy src content into
 * the newly created socket.
 *
 * This is mostly useful when lttcomm_sock are passed between process where the
 * fd and ops have to be changed within the correct address space.
 */
LTTNG_HIDDEN
struct lttcomm_sock *lttcomm_alloc_copy_sock(struct lttcomm_sock *src)
{
	struct lttcomm_sock *sock;

	/* Safety net */
	assert(src);

	sock = lttcomm_alloc_sock(src->proto);
	if (sock == NULL) {
		goto alloc_error;
	}

	lttcomm_copy_sock(sock, src);

alloc_error:
	return sock;
}

/*
 * Create and copy socket from an allocated lttcomm socket structure.
 *
 * This is mostly useful when lttcomm_sock are passed between process where the
 * fd and ops have to be changed within the correct address space.
 */
LTTNG_HIDDEN
void lttcomm_copy_sock(struct lttcomm_sock *dst, struct lttcomm_sock *src)
{
	/* Safety net */
	assert(dst);
	assert(src);

	dst->proto = src->proto;
	dst->fd = src->fd;
	dst->ops = src->ops;
	/* Copy sockaddr information from original socket */
	memcpy(&dst->sockaddr, &src->sockaddr, sizeof(dst->sockaddr));
}

/*
 * Init IPv4 sockaddr structure.
 */
LTTNG_HIDDEN
int lttcomm_init_inet_sockaddr(struct lttcomm_sockaddr *sockaddr,
		const char *ip, unsigned int port)
{
	int ret;

	assert(sockaddr);
	assert(ip);
	assert(port > 0 && port <= 65535);

	memset(sockaddr, 0, sizeof(struct lttcomm_sockaddr));

	sockaddr->type = LTTCOMM_INET;
	sockaddr->addr.sin.sin_family = AF_INET;
	sockaddr->addr.sin.sin_port = htons(port);
	ret = inet_pton(sockaddr->addr.sin.sin_family, ip,
			&sockaddr->addr.sin.sin_addr);
	if (ret < 1) {
		ret = -1;
		ERR("%s with port %d: unrecognized IPv4 address", ip, port);
		goto error;
	}
	memset(sockaddr->addr.sin.sin_zero, 0, sizeof(sockaddr->addr.sin.sin_zero));

error:
	return ret;
}

/*
 * Init IPv6 sockaddr structure.
 */
LTTNG_HIDDEN
int lttcomm_init_inet6_sockaddr(struct lttcomm_sockaddr *sockaddr,
		const char *ip, unsigned int port)
{
	int ret;

	assert(sockaddr);
	assert(ip);
	assert(port > 0 && port <= 65535);

	memset(sockaddr, 0, sizeof(struct lttcomm_sockaddr));

	sockaddr->type = LTTCOMM_INET6;
	sockaddr->addr.sin6.sin6_family = AF_INET6;
	sockaddr->addr.sin6.sin6_port = htons(port);
	ret = inet_pton(sockaddr->addr.sin6.sin6_family, ip,
			&sockaddr->addr.sin6.sin6_addr);
	if (ret < 1) {
		ret = -1;
		goto error;
	}

error:
	return ret;
}

/*
 * Return allocated lttcomm socket structure from lttng URI.
 */
LTTNG_HIDDEN
struct lttcomm_sock *lttcomm_alloc_sock_from_uri(struct lttng_uri *uri)
{
	int ret;
	int _sock_proto;
	struct lttcomm_sock *sock = NULL;

	/* Safety net */
	assert(uri);

	/* Check URI protocol */
	if (uri->proto == LTTNG_TCP) {
		_sock_proto = LTTCOMM_SOCK_TCP;
	} else {
		ERR("Relayd invalid URI proto: %d", uri->proto);
		goto alloc_error;
	}

	sock = lttcomm_alloc_sock(_sock_proto);
	if (sock == NULL) {
		goto alloc_error;
	}

	/* Check destination type */
	if (uri->dtype == LTTNG_DST_IPV4) {
		ret = lttcomm_init_inet_sockaddr(&sock->sockaddr, uri->dst.ipv4,
				uri->port);
		if (ret < 0) {
			goto error;
		}
	} else if (uri->dtype == LTTNG_DST_IPV6) {
		ret = lttcomm_init_inet6_sockaddr(&sock->sockaddr, uri->dst.ipv6,
				uri->port);
		if (ret < 0) {
			goto error;
		}
	} else {
		/* Command URI is invalid */
		ERR("Relayd invalid URI dst type: %d", uri->dtype);
		goto error;
	}

	return sock;

error:
	lttcomm_destroy_sock(sock);
alloc_error:
	return NULL;
}

/*
 * Destroy and free lttcomm socket.
 */
LTTNG_HIDDEN
void lttcomm_destroy_sock(struct lttcomm_sock *sock)
{
	free(sock);
}

/*
 * Allocate and return a relayd socket object using a given URI to initialize
 * it and the major/minor version of the supported protocol.
 *
 * On error, NULL is returned.
 */
LTTNG_HIDDEN
struct lttcomm_relayd_sock *lttcomm_alloc_relayd_sock(struct lttng_uri *uri,
		uint32_t major, uint32_t minor)
{
	int ret;
	struct lttcomm_sock *tmp_sock = NULL;
	struct lttcomm_relayd_sock *rsock = NULL;

	assert(uri);

	rsock = zmalloc(sizeof(*rsock));
	if (!rsock) {
		PERROR("zmalloc relayd sock");
		goto error;
	}

	/* Allocate socket object from URI */
	tmp_sock = lttcomm_alloc_sock_from_uri(uri);
	if (tmp_sock == NULL) {
		goto error_free;
	}

	/*
	 * Create socket object which basically sets the ops according to the
	 * socket protocol.
	 */
	lttcomm_copy_sock(&rsock->sock, tmp_sock);
	/* Temporary socket pointer not needed anymore. */
	lttcomm_destroy_sock(tmp_sock);
	ret = lttcomm_create_sock(&rsock->sock);
	if (ret < 0) {
		goto error_free;
	}

	rsock->major = major;
	rsock->minor = minor;

	return rsock;

error_free:
	free(rsock);
error:
	return NULL;
}

/*
 * Set socket receiving timeout.
 */
LTTNG_HIDDEN
int lttcomm_setsockopt_rcv_timeout(int sock, unsigned int msec)
{
	int ret;
	struct timeval tv;

	tv.tv_sec = msec / 1000;
	tv.tv_usec = (msec % 1000) * 1000;

	ret = setsockopt(sock, SOL_SOCKET, SO_RCVTIMEO, &tv, sizeof(tv));
	if (ret < 0) {
		PERROR("setsockopt SO_RCVTIMEO");
	}

	return ret;
}

/*
 * Set socket sending timeout.
 */
LTTNG_HIDDEN
int lttcomm_setsockopt_snd_timeout(int sock, unsigned int msec)
{
	int ret;
	struct timeval tv;

	tv.tv_sec = msec / 1000;
	tv.tv_usec = (msec % 1000) * 1000;

	ret = setsockopt(sock, SOL_SOCKET, SO_SNDTIMEO, &tv, sizeof(tv));
	if (ret < 0) {
		PERROR("setsockopt SO_SNDTIMEO");
	}

	return ret;
}

LTTNG_HIDDEN
int lttcomm_sock_get_port(const struct lttcomm_sock *sock, uint16_t *port)
{
	assert(sock);
	assert(port);
	assert(sock->sockaddr.type == LTTCOMM_INET ||
			sock->sockaddr.type == LTTCOMM_INET6);
	assert(sock->proto == LTTCOMM_SOCK_TCP ||
			sock->proto == LTTCOMM_SOCK_UDP);

	switch (sock->sockaddr.type) {
	case LTTCOMM_INET:
		*port = ntohs(sock->sockaddr.addr.sin.sin_port);
		break;
	case LTTCOMM_INET6:
		*port = ntohs(sock->sockaddr.addr.sin6.sin6_port);
		break;
	default:
		abort();
	}

	return 0;
}

LTTNG_HIDDEN
int lttcomm_sock_set_port(struct lttcomm_sock *sock, uint16_t port)
{
	assert(sock);
	assert(sock->sockaddr.type == LTTCOMM_INET ||
			sock->sockaddr.type == LTTCOMM_INET6);
	assert(sock->proto == LTTCOMM_SOCK_TCP ||
			sock->proto == LTTCOMM_SOCK_UDP);

	switch (sock->sockaddr.type) {
	case LTTCOMM_INET:
		sock->sockaddr.addr.sin.sin_port = htons(port);
		break;
	case LTTCOMM_INET6:
		sock->sockaddr.addr.sin6.sin6_port = htons(port);
		break;
	default:
		abort();
	}

	return 0;
}

LTTNG_HIDDEN
void lttcomm_init(void)
{
	const char *env;

	env = getenv(NETWORK_TIMEOUT_ENV);
	if (env) {
		long timeout;

		errno = 0;
		timeout = strtol(env, NULL, 0);
		if (errno != 0 || timeout < -1L) {
			PERROR("Network timeout");
		} else {
			if (timeout > 0) {
				network_timeout = timeout;
			}
		}
	}
}

LTTNG_HIDDEN
unsigned long lttcomm_get_network_timeout(void)
{
	return network_timeout;
}
Commit	Line	Data
826d496d	1	/*
ab5be9fa MJ	2	* Copyright (C) 2011 David Goulet <david.goulet@polymtl.ca>
	3	* Copyright (C) 2011 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
	4	*
	5	* SPDX-License-Identifier: GPL-2.0-only
fac6795d	6	*
fac6795d DG	7	*/
fac6795d DG	8
6c1c0768	9	#define _LGPL_SOURCE
1e307fab	10	#include <assert.h>
fac6795d DG	11	#include <limits.h>
	12	#include <stdio.h>
	13	#include <stdlib.h>
	14	#include <string.h>
fac6795d DG	15	#include <sys/stat.h>
fac6795d DG	16	#include <sys/types.h>
fac6795d	17	#include <unistd.h>
3bd1e081	18	#include <errno.h>
2288467f	19	#include <inttypes.h>
fac6795d	20
90e535ef	21	#include <common/common.h>
990570ed	22
10a8a223	23	#include "sessiond-comm.h"
fac6795d	24
6364a07a	25	/* For Unix socket */
2038dd6c	26	#include <common/unix.h>
6364a07a DG	27	/* For Inet socket */
	28	#include "inet.h"
	29	/* For Inet6 socket */
	30	#include "inet6.h"
	31
554831e7 MD	32	#define NETWORK_TIMEOUT_ENV "LTTNG_NETWORK_SOCKET_TIMEOUT"
554831e7 MD	33
32dd26fb	34	static struct lttcomm_net_family net_families[] = {
6364a07a DG	35	{ LTTCOMM_INET, lttcomm_create_inet_sock },
	36	{ LTTCOMM_INET6, lttcomm_create_inet6_sock },
	37	};
	38
fac6795d DG	39	/*
	40	* Human readable error message.
	41	*/
	42	static const char *lttcomm_readable_code[] = {
f73fabfd DG	43	[ LTTCOMM_ERR_INDEX(LTTCOMM_CONSUMERD_COMMAND_SOCK_READY) ] = "consumerd command socket ready",
	44	[ LTTCOMM_ERR_INDEX(LTTCOMM_CONSUMERD_SUCCESS_RECV_FD) ] = "consumerd success on receiving fds",
	45	[ LTTCOMM_ERR_INDEX(LTTCOMM_CONSUMERD_ERROR_RECV_FD) ] = "consumerd error on receiving fds",
	46	[ LTTCOMM_ERR_INDEX(LTTCOMM_CONSUMERD_ERROR_RECV_CMD) ] = "consumerd error on receiving command",
	47	[ LTTCOMM_ERR_INDEX(LTTCOMM_CONSUMERD_POLL_ERROR) ] = "consumerd error in polling thread",
	48	[ LTTCOMM_ERR_INDEX(LTTCOMM_CONSUMERD_POLL_NVAL) ] = "consumerd polling on closed fd",
	49	[ LTTCOMM_ERR_INDEX(LTTCOMM_CONSUMERD_POLL_HUP) ] = "consumerd all fd hung up",
	50	[ LTTCOMM_ERR_INDEX(LTTCOMM_CONSUMERD_EXIT_SUCCESS) ] = "consumerd exiting normally",
	51	[ LTTCOMM_ERR_INDEX(LTTCOMM_CONSUMERD_EXIT_FAILURE) ] = "consumerd exiting on error",
	52	[ LTTCOMM_ERR_INDEX(LTTCOMM_CONSUMERD_OUTFD_ERROR) ] = "consumerd error opening the tracefile",
	53	[ LTTCOMM_ERR_INDEX(LTTCOMM_CONSUMERD_SPLICE_EBADF) ] = "consumerd splice EBADF",
	54	[ LTTCOMM_ERR_INDEX(LTTCOMM_CONSUMERD_SPLICE_EINVAL) ] = "consumerd splice EINVAL",
	55	[ LTTCOMM_ERR_INDEX(LTTCOMM_CONSUMERD_SPLICE_ENOMEM) ] = "consumerd splice ENOMEM",
	56	[ LTTCOMM_ERR_INDEX(LTTCOMM_CONSUMERD_SPLICE_ESPIPE) ] = "consumerd splice ESPIPE",
40727660 MD	57	[ LTTCOMM_ERR_INDEX(LTTCOMM_CONSUMERD_ENOMEM) ] = "Consumer is out of memory",
	58	[ LTTCOMM_ERR_INDEX(LTTCOMM_CONSUMERD_ERROR_METADATA) ] = "Error with metadata",
	59	[ LTTCOMM_ERR_INDEX(LTTCOMM_CONSUMERD_FATAL) ] = "Fatal error",
618a6a28	60	[ LTTCOMM_ERR_INDEX(LTTCOMM_CONSUMERD_RELAYD_FAIL) ] = "Error on remote relayd",
80e327fa	61
f73fabfd DG	62	/* Last element */
f73fabfd DG	63	[ LTTCOMM_ERR_INDEX(LTTCOMM_NR) ] = "Unknown error code"
fac6795d DG	64	};
fac6795d DG	65
554831e7 MD	66	static unsigned long network_timeout;
554831e7 MD	67
fac6795d	68	/*
917216f6 DG	69	* Return ptr to string representing a human readable error code from the
917216f6 DG	70	* lttcomm_return_code enum.
fac6795d	71	*
917216f6	72	* These code MUST be negative in other to treat that as an error value.
fac6795d	73	*/
90e535ef	74	LTTNG_HIDDEN
fac6795d DG	75	const char *lttcomm_get_readable_code(enum lttcomm_return_code code)
fac6795d DG	76	{
f73fabfd	77	code = -code;
fac6795d	78
c617c0c6	79	if (code < LTTCOMM_CONSUMERD_COMMAND_SOCK_READY \|\| code > LTTCOMM_NR) {
f73fabfd	80	code = LTTCOMM_NR;
fac6795d DG	81	}
fac6795d DG	82
f73fabfd	83	return lttcomm_readable_code[LTTCOMM_ERR_INDEX(code)];
fac6795d	84	}
6364a07a DG	85
6364a07a DG	86	/*
de5e9086 DG	87	* Create socket from an already allocated lttcomm socket structure and init
de5e9086 DG	88	* sockaddr in the lttcomm sock.
6364a07a	89	*/
90e535ef	90	LTTNG_HIDDEN
de5e9086	91	int lttcomm_create_sock(struct lttcomm_sock *sock)
6364a07a	92	{
de5e9086	93	int ret, _sock_type, _sock_proto, domain;
6364a07a	94
de5e9086 DG	95	assert(sock);
	96
	97	domain = sock->sockaddr.type;
	98	if (domain != LTTCOMM_INET && domain != LTTCOMM_INET6) {
	99	ERR("Create socket of unknown domain %d", domain);
	100	ret = -1;
	101	goto error;
6364a07a DG	102	}
6364a07a DG	103
de5e9086 DG	104	switch (sock->proto) {
	105	case LTTCOMM_SOCK_UDP:
	106	_sock_type = SOCK_DGRAM;
	107	_sock_proto = IPPROTO_UDP;
	108	break;
	109	case LTTCOMM_SOCK_TCP:
	110	_sock_type = SOCK_STREAM;
	111	_sock_proto = IPPROTO_TCP;
	112	break;
	113	default:
	114	ret = -1;
	115	goto error;
	116	}
6364a07a	117
de5e9086 DG	118	ret = net_families[domain].create(sock, _sock_type, _sock_proto);
	119	if (ret < 0) {
	120	goto error;
	121	}
	122
	123	error:
	124	return ret;
6364a07a DG	125	}
	126
	127	/*
de5e9086	128	* Return allocated lttcomm socket structure.
6364a07a	129	*/
90e535ef	130	LTTNG_HIDDEN
de5e9086	131	struct lttcomm_sock *lttcomm_alloc_sock(enum lttcomm_sock_proto proto)
6364a07a	132	{
de5e9086	133	struct lttcomm_sock *sock;
6364a07a	134
de5e9086 DG	135	sock = zmalloc(sizeof(struct lttcomm_sock));
	136	if (sock == NULL) {
	137	PERROR("zmalloc create sock");
	138	goto end;
6364a07a DG	139	}
	140
	141	sock->proto = proto;
de5e9086	142	sock->fd = -1;
6364a07a	143
de5e9086 DG	144	end:
de5e9086 DG	145	return sock;
6364a07a DG	146	}
	147
	148	/*
de5e9086 DG	149	* Return an allocated lttcomm socket structure and copy src content into
	150	* the newly created socket.
	151	*
	152	* This is mostly useful when lttcomm_sock are passed between process where the
	153	* fd and ops have to be changed within the correct address space.
6364a07a	154	*/
90e535ef	155	LTTNG_HIDDEN
de5e9086	156	struct lttcomm_sock lttcomm_alloc_copy_sock(struct lttcomm_sock src)
6364a07a	157	{
6364a07a DG	158	struct lttcomm_sock *sock;
6364a07a DG	159
de5e9086 DG	160	/* Safety net */
	161	assert(src);
	162
	163	sock = lttcomm_alloc_sock(src->proto);
6364a07a DG	164	if (sock == NULL) {
	165	goto alloc_error;
	166	}
	167
de5e9086	168	lttcomm_copy_sock(sock, src);
6364a07a	169
de5e9086	170	alloc_error:
6364a07a	171	return sock;
de5e9086	172	}
6364a07a	173
de5e9086 DG	174	/*
	175	* Create and copy socket from an allocated lttcomm socket structure.
	176	*
	177	* This is mostly useful when lttcomm_sock are passed between process where the
	178	* fd and ops have to be changed within the correct address space.
	179	*/
90e535ef	180	LTTNG_HIDDEN
de5e9086 DG	181	void lttcomm_copy_sock(struct lttcomm_sock dst, struct lttcomm_sock src)
	182	{
	183	/* Safety net */
	184	assert(dst);
	185	assert(src);
	186
	187	dst->proto = src->proto;
	188	dst->fd = src->fd;
	189	dst->ops = src->ops;
	190	/* Copy sockaddr information from original socket */
	191	memcpy(&dst->sockaddr, &src->sockaddr, sizeof(dst->sockaddr));
6364a07a DG	192	}
	193
	194	/*
	195	* Init IPv4 sockaddr structure.
	196	*/
90e535ef	197	LTTNG_HIDDEN
6364a07a DG	198	int lttcomm_init_inet_sockaddr(struct lttcomm_sockaddr *sockaddr,
	199	const char *ip, unsigned int port)
	200	{
	201	int ret;
	202
	203	assert(sockaddr);
	204	assert(ip);
	205	assert(port > 0 && port <= 65535);
	206
	207	memset(sockaddr, 0, sizeof(struct lttcomm_sockaddr));
	208
	209	sockaddr->type = LTTCOMM_INET;
	210	sockaddr->addr.sin.sin_family = AF_INET;
	211	sockaddr->addr.sin.sin_port = htons(port);
	212	ret = inet_pton(sockaddr->addr.sin.sin_family, ip,
	213	&sockaddr->addr.sin.sin_addr);
	214	if (ret < 1) {
	215	ret = -1;
de5e9086	216	ERR("%s with port %d: unrecognized IPv4 address", ip, port);
6364a07a DG	217	goto error;
	218	}
	219	memset(sockaddr->addr.sin.sin_zero, 0, sizeof(sockaddr->addr.sin.sin_zero));
	220
	221	error:
	222	return ret;
	223	}
	224
	225	/*
	226	* Init IPv6 sockaddr structure.
	227	*/
90e535ef	228	LTTNG_HIDDEN
6364a07a DG	229	int lttcomm_init_inet6_sockaddr(struct lttcomm_sockaddr *sockaddr,
	230	const char *ip, unsigned int port)
	231	{
	232	int ret;
	233
	234	assert(sockaddr);
	235	assert(ip);
	236	assert(port > 0 && port <= 65535);
	237
	238	memset(sockaddr, 0, sizeof(struct lttcomm_sockaddr));
	239
	240	sockaddr->type = LTTCOMM_INET6;
	241	sockaddr->addr.sin6.sin6_family = AF_INET6;
	242	sockaddr->addr.sin6.sin6_port = htons(port);
	243	ret = inet_pton(sockaddr->addr.sin6.sin6_family, ip,
	244	&sockaddr->addr.sin6.sin6_addr);
	245	if (ret < 1) {
	246	ret = -1;
	247	goto error;
	248	}
	249
	250	error:
	251	return ret;
	252	}
de5e9086 DG	253
	254	/*
	255	* Return allocated lttcomm socket structure from lttng URI.
	256	*/
90e535ef	257	LTTNG_HIDDEN
de5e9086 DG	258	struct lttcomm_sock lttcomm_alloc_sock_from_uri(struct lttng_uri uri)
	259	{
	260	int ret;
	261	int _sock_proto;
	262	struct lttcomm_sock *sock = NULL;
	263
	264	/* Safety net */
	265	assert(uri);
	266
	267	/* Check URI protocol */
	268	if (uri->proto == LTTNG_TCP) {
	269	_sock_proto = LTTCOMM_SOCK_TCP;
	270	} else {
	271	ERR("Relayd invalid URI proto: %d", uri->proto);
	272	goto alloc_error;
	273	}
	274
	275	sock = lttcomm_alloc_sock(_sock_proto);
	276	if (sock == NULL) {
	277	goto alloc_error;
	278	}
	279
	280	/* Check destination type */
	281	if (uri->dtype == LTTNG_DST_IPV4) {
	282	ret = lttcomm_init_inet_sockaddr(&sock->sockaddr, uri->dst.ipv4,
	283	uri->port);
	284	if (ret < 0) {
	285	goto error;
	286	}
	287	} else if (uri->dtype == LTTNG_DST_IPV6) {
	288	ret = lttcomm_init_inet6_sockaddr(&sock->sockaddr, uri->dst.ipv6,
	289	uri->port);
	290	if (ret < 0) {
	291	goto error;
	292	}
	293	} else {
	294	/* Command URI is invalid */
	295	ERR("Relayd invalid URI dst type: %d", uri->dtype);
	296	goto error;
	297	}
	298
	299	return sock;
	300
	301	error:
	302	lttcomm_destroy_sock(sock);
	303	alloc_error:
	304	return NULL;
	305	}
	306
	307	/*
	308	* Destroy and free lttcomm socket.
	309	*/
90e535ef	310	LTTNG_HIDDEN
de5e9086 DG	311	void lttcomm_destroy_sock(struct lttcomm_sock *sock)
de5e9086 DG	312	{
0e428499	313	free(sock);
de5e9086	314	}
6151a90f JD	315
	316	/*
	317	* Allocate and return a relayd socket object using a given URI to initialize
	318	* it and the major/minor version of the supported protocol.
	319	*
	320	* On error, NULL is returned.
	321	*/
bc182241	322	LTTNG_HIDDEN
6151a90f JD	323	struct lttcomm_relayd_sock lttcomm_alloc_relayd_sock(struct lttng_uri uri,
	324	uint32_t major, uint32_t minor)
	325	{
	326	int ret;
	327	struct lttcomm_sock *tmp_sock = NULL;
	328	struct lttcomm_relayd_sock *rsock = NULL;
	329
	330	assert(uri);
	331
	332	rsock = zmalloc(sizeof(*rsock));
	333	if (!rsock) {
	334	PERROR("zmalloc relayd sock");
	335	goto error;
	336	}
	337
	338	/* Allocate socket object from URI */
	339	tmp_sock = lttcomm_alloc_sock_from_uri(uri);
	340	if (tmp_sock == NULL) {
	341	goto error_free;
	342	}
	343
	344	/*
	345	* Create socket object which basically sets the ops according to the
	346	* socket protocol.
	347	*/
	348	lttcomm_copy_sock(&rsock->sock, tmp_sock);
	349	/* Temporary socket pointer not needed anymore. */
	350	lttcomm_destroy_sock(tmp_sock);
	351	ret = lttcomm_create_sock(&rsock->sock);
	352	if (ret < 0) {
	353	goto error_free;
	354	}
	355
	356	rsock->major = major;
	357	rsock->minor = minor;
	358
	359	return rsock;
	360
	361	error_free:
	362	free(rsock);
	363	error:
	364	return NULL;
	365	}
554831e7	366
783a3b9a MD	367	/*
	368	* Set socket receiving timeout.
	369	*/
	370	LTTNG_HIDDEN
	371	int lttcomm_setsockopt_rcv_timeout(int sock, unsigned int msec)
	372	{
	373	int ret;
	374	struct timeval tv;
	375
	376	tv.tv_sec = msec / 1000;
	377	tv.tv_usec = (msec % 1000) * 1000;
	378
	379	ret = setsockopt(sock, SOL_SOCKET, SO_RCVTIMEO, &tv, sizeof(tv));
	380	if (ret < 0) {
	381	PERROR("setsockopt SO_RCVTIMEO");
	382	}
	383
	384	return ret;
	385	}
	386
	387	/*
	388	* Set socket sending timeout.
	389	*/
	390	LTTNG_HIDDEN
	391	int lttcomm_setsockopt_snd_timeout(int sock, unsigned int msec)
	392	{
	393	int ret;
	394	struct timeval tv;
	395
	396	tv.tv_sec = msec / 1000;
	397	tv.tv_usec = (msec % 1000) * 1000;
	398
	399	ret = setsockopt(sock, SOL_SOCKET, SO_SNDTIMEO, &tv, sizeof(tv));
	400	if (ret < 0) {
	401	PERROR("setsockopt SO_SNDTIMEO");
	402	}
	403
	404	return ret;
	405	}
	406
2288467f JG	407	LTTNG_HIDDEN
	408	int lttcomm_sock_get_port(const struct lttcomm_sock sock, uint16_t port)
	409	{
	410	assert(sock);
	411	assert(port);
	412	assert(sock->sockaddr.type == LTTCOMM_INET \|\|
	413	sock->sockaddr.type == LTTCOMM_INET6);
	414	assert(sock->proto == LTTCOMM_SOCK_TCP \|\|
	415	sock->proto == LTTCOMM_SOCK_UDP);
	416
	417	switch (sock->sockaddr.type) {
	418	case LTTCOMM_INET:
	419	*port = ntohs(sock->sockaddr.addr.sin.sin_port);
	420	break;
	421	case LTTCOMM_INET6:
	422	*port = ntohs(sock->sockaddr.addr.sin6.sin6_port);
	423	break;
	424	default:
	425	abort();
	426	}
	427
	428	return 0;
	429	}
	430
	431	LTTNG_HIDDEN
	432	int lttcomm_sock_set_port(struct lttcomm_sock *sock, uint16_t port)
	433	{
	434	assert(sock);
	435	assert(sock->sockaddr.type == LTTCOMM_INET \|\|
	436	sock->sockaddr.type == LTTCOMM_INET6);
	437	assert(sock->proto == LTTCOMM_SOCK_TCP \|\|
	438	sock->proto == LTTCOMM_SOCK_UDP);
	439
	440	switch (sock->sockaddr.type) {
	441	case LTTCOMM_INET:
	442	sock->sockaddr.addr.sin.sin_port = htons(port);
	443	break;
	444	case LTTCOMM_INET6:
	445	sock->sockaddr.addr.sin6.sin6_port = htons(port);
	446	break;
	447	default:
	448	abort();
	449	}
	450
	451	return 0;
	452	}
	453
554831e7 MD	454	LTTNG_HIDDEN
	455	void lttcomm_init(void)
	456	{
	457	const char *env;
	458
	459	env = getenv(NETWORK_TIMEOUT_ENV);
	460	if (env) {
	461	long timeout;
	462
	463	errno = 0;
	464	timeout = strtol(env, NULL, 0);
	465	if (errno != 0 \|\| timeout < -1L) {
	466	PERROR("Network timeout");
	467	} else {
	468	if (timeout > 0) {
	469	network_timeout = timeout;
	470	}
	471	}
	472	}
	473	}
	474
	475	LTTNG_HIDDEN
	476	unsigned long lttcomm_get_network_timeout(void)
	477	{
	478	return network_timeout;
	479	}