[deb_libnfs.git] / lib / socket.c

/*
   Copyright (C) 2010 by Ronnie Sahlberg <ronniesahlberg@gmail.com>

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU Lesser General Public License as published by
   the Free Software Foundation; either version 2.1 of the License, or
   (at your option) any later version.

   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 Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public License
   along with this program; if not, see <http://www.gnu.org/licenses/>.
*/

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
#include <poll.h>
#include <string.h>
#include <errno.h>
#include <rpc/rpc.h>
#include <rpc/xdr.h>
#include <arpa/inet.h>
#include <sys/ioctl.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netdb.h>
#include "libnfs.h"
#include "libnfs-raw.h"
#include "libnfs-private.h"
#include "slist.h"

static void set_nonblocking(int fd)
{
	unsigned v;
	v = fcntl(fd, F_GETFL, 0);
        fcntl(fd, F_SETFL, v | O_NONBLOCK);
}

int rpc_get_fd(struct rpc_context *rpc)
{
	return rpc->fd;
}

int rpc_which_events(struct rpc_context *rpc)
{
	int events = rpc->is_connected ? POLLIN : POLLOUT;

	if (rpc->is_udp != 0) {
		/* for udp sockets we only wait for pollin */
		return POLLIN;
	}

	if (rpc->outqueue) {
		events |= POLLOUT;
	}
	return events;
}

static int rpc_write_to_socket(struct rpc_context *rpc)
{
	ssize_t count;

	if (rpc == NULL) {
		return -1;
	}
	if (rpc->fd == -1) {
		rpc_set_error(rpc, "trying to write but not connected");
		return -1;
	}

	while (rpc->outqueue != NULL) {
		ssize_t total;

		total = rpc->outqueue->outdata.size;

		count = write(rpc->fd, rpc->outqueue->outdata.data + rpc->outqueue->written, total - rpc->outqueue->written);
		if (count == -1) {
			if (errno == EAGAIN || errno == EWOULDBLOCK) {
				return 0;
			}
			rpc_set_error(rpc, "Error when writing to socket :%s(%d)", strerror(errno), errno);
			return -1;
		}

		rpc->outqueue->written += count;
		if (rpc->outqueue->written == total) {
			struct rpc_pdu *pdu = rpc->outqueue;

	       	    	SLIST_REMOVE(&rpc->outqueue, pdu);
			SLIST_ADD_END(&rpc->waitpdu, pdu);
		}
	}
	return 0;
}

static int rpc_read_from_socket(struct rpc_context *rpc)
{
	int available;
	int size;
	int pdu_size;
	ssize_t count;

	if (ioctl(rpc->fd, FIONREAD, &available) != 0) {
		rpc_set_error(rpc, "Ioctl FIONREAD returned error : %d. Closing socket.", errno);
		return -1;
	}
	if (available == 0) {
		rpc_set_error(rpc, "Socket has been closed");
		return -1;
	}

	if (rpc->is_udp) {
		char *buf;
		socklen_t socklen = sizeof(rpc->udp_src);

		buf = malloc(available);
		if (buf == NULL) {
			rpc_set_error(rpc, "Failed to malloc buffer for recvfrom");
			return -1;
		}
		count = recvfrom(rpc->fd, buf, available, MSG_DONTWAIT, (struct sockaddr *)&rpc->udp_src, &socklen);
		if (count < 0) {
			rpc_set_error(rpc, "Failed recvfrom: %s", strerror(errno));
			free(buf);
		}
		if (rpc_process_pdu(rpc, buf, count) != 0) {
			rpc_set_error(rpc, "Invalid/garbage pdu received from server. Ignoring PDU");
			free(buf);
			return -1;
		}
		free(buf);
		return 0;
	}

	/* read record marker, 4 bytes at the beginning of every pdu */
	if (rpc->inbuf == NULL) {
		rpc->insize = 4;
		rpc->inbuf = malloc(rpc->insize);
		if (rpc->inbuf == NULL) {
			rpc_set_error(rpc, "Failed to allocate buffer for record marker, errno:%d. Closing socket.", errno);
			return -1;
		}
	}
	if (rpc->inpos < 4) {
		size = 4 - rpc->inpos;

		count = read(rpc->fd, rpc->inbuf + rpc->inpos, size);
		if (count == -1) {
			if (errno == EINTR) {
				return 0;
			}
			rpc_set_error(rpc, "Read from socket failed, errno:%d. Closing socket.", errno);
			return -1;
		}
		available  -= count;
		rpc->inpos += count;
	}

	if (available == 0) {
		return 0;
	}

	pdu_size = rpc_get_pdu_size(rpc->inbuf);
	if (rpc->insize < pdu_size) {
		unsigned char *buf;
		
		buf = malloc(pdu_size);
		if (buf == NULL) {
			rpc_set_error(rpc, "Failed to allocate buffer of %d bytes for pdu, errno:%d. Closing socket.", pdu_size, errno);
			return -1;
		}
		memcpy(buf, rpc->inbuf, rpc->insize);
		free(rpc->inbuf);
		rpc->inbuf  = buf;
		rpc->insize = rpc_get_pdu_size(rpc->inbuf);
	}

	size = available;
	if (size > rpc->insize - rpc->inpos) {
		size = rpc->insize - rpc->inpos;
	}

	count = read(rpc->fd, rpc->inbuf + rpc->inpos, size);
	if (count == -1) {
		if (errno == EINTR) {
			return 0;
		}
		rpc_set_error(rpc, "Read from socket failed, errno:%d. Closing socket.", errno);
		return -1;
	}
	available  -= count;
	rpc->inpos += count;

	if (rpc->inpos == rpc->insize) {
		if (rpc_process_pdu(rpc, rpc->inbuf, pdu_size) != 0) {
			rpc_set_error(rpc, "Invalid/garbage pdu received from server. Closing socket");
			return -1;
		}
		free(rpc->inbuf);
		rpc->inbuf  = NULL;
		rpc->insize = 0;
		rpc->inpos  = 0;
	}

	return 0;
}


int rpc_service(struct rpc_context *rpc, int revents)
{
	if (revents & POLLERR) {
		int err = 0;
		socklen_t err_size = sizeof(err);

		if (getsockopt(rpc->fd, SOL_SOCKET, SO_ERROR,
				&err, &err_size) != 0 || err != 0) {
			if (err == 0) {
				err = errno;
			}
			rpc_set_error(rpc, "rpc_service: socket error "
					       "%s(%d).",
					       strerror(err), err);
		} else {
			rpc_set_error(rpc, "rpc_service: POLLERR, "
						"Unknown socket error.");
		}
		rpc->connect_cb(rpc, RPC_STATUS_ERROR, rpc->error_string, rpc->connect_data);
		return -1;
	}
	if (revents & POLLHUP) {
		rpc_set_error(rpc, "Socket failed with POLLHUP");
		rpc->connect_cb(rpc, RPC_STATUS_ERROR, rpc->error_string, rpc->connect_data);
		return -1;
	}

	if (rpc->is_connected == 0 && rpc->fd != -1 && revents&POLLOUT) {
		int err = 0;
		socklen_t err_size = sizeof(err);

		if (getsockopt(rpc->fd, SOL_SOCKET, SO_ERROR,
				&err, &err_size) != 0 || err != 0) {
			if (err == 0) {
				err = errno;
			}
			rpc_set_error(rpc, "rpc_service: socket error "
				  	"%s(%d) while connecting.",
					strerror(err), err);
			rpc->connect_cb(rpc, RPC_STATUS_ERROR,
					NULL, rpc->connect_data);
			return -1;
		}

		rpc->is_connected = 1;
		rpc->connect_cb(rpc, RPC_STATUS_SUCCESS, NULL, rpc->connect_data);
		return 0;
	}

	if (revents & POLLOUT && rpc->outqueue != NULL) {
		if (rpc_write_to_socket(rpc) != 0) {
			rpc_set_error(rpc, "write to socket failed");
			return -1;
		}
	}

	if (revents & POLLIN) {
		if (rpc_read_from_socket(rpc) != 0) {
			rpc_disconnect(rpc, rpc_get_error(rpc));
			return -1;
		}
	}

	return 0;
}


int rpc_connect_async(struct rpc_context *rpc, const char *server, int port, rpc_cb cb, void *private_data)
{
	struct sockaddr_storage s;
	struct sockaddr_in *sin = (struct sockaddr_in *)&s;
	int socksize;

	if (rpc->fd != -1) {
		rpc_set_error(rpc, "Trying to connect while already connected");
		return -1;
	}

	if (rpc->is_udp != 0) {
		rpc_set_error(rpc, "Trying to connect on UDP socket");
		return -1;
	}

	sin->sin_family = AF_INET;
	sin->sin_port   = htons(port);
	if (inet_pton(AF_INET, server, &sin->sin_addr) != 1) {
		rpc_set_error(rpc, "Not a valid server ip address");
		return -1;
	}

	switch (s.ss_family) {
	case AF_INET:
		socksize = sizeof(struct sockaddr_in);
#ifdef HAVE_SOCK_SIN_LEN
		sin->sin_len = socksize;
#endif
		rpc->fd = socket(AF_INET, SOCK_STREAM, 0);
		break;
	}

	if (rpc->fd == -1) {
		rpc_set_error(rpc, "Failed to open socket");
		return -1;
	}

	rpc->connect_cb  = cb;
	rpc->connect_data = private_data;

	set_nonblocking(rpc->fd);

	if (connect(rpc->fd, (struct sockaddr *)&s, socksize) != 0 && errno != EINPROGRESS) {
		rpc_set_error(rpc, "connect() to server failed");
		return -1;
	}		

	return 0;
}	    

int rpc_disconnect(struct rpc_context *rpc, char *error)
{
	if (rpc->fd != -1) {
		close(rpc->fd);
	}
	rpc->fd  = -1;

	rpc->is_connected = 0;

	rpc_error_all_pdus(rpc, error);

	return 0;
}


int rpc_bind_udp(struct rpc_context *rpc, char *addr, int port)
{
	struct addrinfo *ai = NULL;
	char service[6];

	if (rpc->is_udp == 0) {
		rpc_set_error(rpc, "Cant not bind UDP. Not UDP context");
		return -1;
	}

	snprintf(service, 6, "%d", port);
	if (getaddrinfo(addr, service, NULL, &ai) != 0) {
		rpc_set_error(rpc, "Invalid address:%s. "
			"Can not resolv into IPv4/v6 structure.");
		return -1;
 	}

	switch(ai->ai_family) {
	case AF_INET:
		rpc->fd = socket(ai->ai_family, SOCK_DGRAM, 0);
		if (rpc->fd == -1) {
			rpc_set_error(rpc, "Failed to create UDP socket: %s", strerror(errno)); 
			freeaddrinfo(ai);
			return -1;
		}

		if (bind(rpc->fd, (struct sockaddr *)ai->ai_addr, sizeof(struct sockaddr_in)) != 0) {
			rpc_set_error(rpc, "Failed to bind to UDP socket: %s",strerror(errno)); 
			freeaddrinfo(ai);
			return -1;
		}
		break;
	default:
		rpc_set_error(rpc, "Can not handle UPD sockets of family %d yet", ai->ai_family);
		freeaddrinfo(ai);
		return -1;
	}

	freeaddrinfo(ai);

	return 0;
}
Commit	Line	Data
84004dbf RS	1	/*
	2	Copyright (C) 2010 by Ronnie Sahlberg <ronniesahlberg@gmail.com>
	3
	4	This program is free software; you can redistribute it and/or modify
	5	it under the terms of the GNU Lesser General Public License as published by
	6	the Free Software Foundation; either version 2.1 of the License, or
	7	(at your option) any later version.
	8
	9	This program is distributed in the hope that it will be useful,
	10	but WITHOUT ANY WARRANTY; without even the implied warranty of
	11	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	12	GNU Lesser General Public License for more details.
	13
	14	You should have received a copy of the GNU Lesser General Public License
	15	along with this program; if not, see <http://www.gnu.org/licenses/>.
	16	*/
	17
	18	#include <stdio.h>
98f5fee8	19	#include <stdlib.h>
84004dbf RS	20	#include <unistd.h>
	21	#include <fcntl.h>
	22	#include <poll.h>
	23	#include <string.h>
	24	#include <errno.h>
98f5fee8	25	#include <rpc/rpc.h>
84004dbf RS	26	#include <rpc/xdr.h>
	27	#include <arpa/inet.h>
	28	#include <sys/ioctl.h>
485bc9b9 RS	29	#include <sys/types.h>
	30	#include <sys/socket.h>
	31	#include <netdb.h>
84004dbf RS	32	#include "libnfs.h"
	33	#include "libnfs-raw.h"
	34	#include "libnfs-private.h"
	35	#include "slist.h"
	36
	37	static void set_nonblocking(int fd)
	38	{
	39	unsigned v;
	40	v = fcntl(fd, F_GETFL, 0);
	41	fcntl(fd, F_SETFL, v \| O_NONBLOCK);
	42	}
	43
	44	int rpc_get_fd(struct rpc_context *rpc)
	45	{
	46	return rpc->fd;
	47	}
	48
	49	int rpc_which_events(struct rpc_context *rpc)
	50	{
912f7ad5	51	int events = rpc->is_connected ? POLLIN : POLLOUT;
84004dbf	52
5911f3e8 RS	53	if (rpc->is_udp != 0) {
	54	/* for udp sockets we only wait for pollin */
	55	return POLLIN;
	56	}
	57
84004dbf RS	58	if (rpc->outqueue) {
	59	events \|= POLLOUT;
	60	}
	61	return events;
	62	}
	63
	64	static int rpc_write_to_socket(struct rpc_context *rpc)
	65	{
	66	ssize_t count;
	67
	68	if (rpc == NULL) {
84004dbf RS	69	return -1;
	70	}
	71	if (rpc->fd == -1) {
1896d37b RS	72	rpc_set_error(rpc, "trying to write but not connected");
1896d37b RS	73	return -1;
84004dbf RS	74	}
	75
	76	while (rpc->outqueue != NULL) {
	77	ssize_t total;
	78
	79	total = rpc->outqueue->outdata.size;
	80
	81	count = write(rpc->fd, rpc->outqueue->outdata.data + rpc->outqueue->written, total - rpc->outqueue->written);
	82	if (count == -1) {
	83	if (errno == EAGAIN \|\| errno == EWOULDBLOCK) {
84004dbf RS	84	return 0;
84004dbf RS	85	}
1896d37b RS	86	rpc_set_error(rpc, "Error when writing to socket :%s(%d)", strerror(errno), errno);
1896d37b RS	87	return -1;
84004dbf RS	88	}
	89
	90	rpc->outqueue->written += count;
	91	if (rpc->outqueue->written == total) {
	92	struct rpc_pdu *pdu = rpc->outqueue;
	93
	94	SLIST_REMOVE(&rpc->outqueue, pdu);
	95	SLIST_ADD_END(&rpc->waitpdu, pdu);
	96	}
	97	}
	98	return 0;
	99	}
	100
	101	static int rpc_read_from_socket(struct rpc_context *rpc)
	102	{
	103	int available;
	104	int size;
cdb19ec1	105	int pdu_size;
84004dbf RS	106	ssize_t count;
	107
	108	if (ioctl(rpc->fd, FIONREAD, &available) != 0) {
	109	rpc_set_error(rpc, "Ioctl FIONREAD returned error : %d. Closing socket.", errno);
	110	return -1;
	111	}
	112	if (available == 0) {
	113	rpc_set_error(rpc, "Socket has been closed");
1896d37b	114	return -1;
84004dbf	115	}
cdb19ec1	116
0268794f RS	117	if (rpc->is_udp) {
	118	char *buf;
	119	socklen_t socklen = sizeof(rpc->udp_src);
	120
	121	buf = malloc(available);
	122	if (buf == NULL) {
	123	rpc_set_error(rpc, "Failed to malloc buffer for recvfrom");
	124	return -1;
	125	}
	126	count = recvfrom(rpc->fd, buf, available, MSG_DONTWAIT, (struct sockaddr *)&rpc->udp_src, &socklen);
	127	if (count < 0) {
	128	rpc_set_error(rpc, "Failed recvfrom: %s", strerror(errno));
	129	free(buf);
	130	}
	131	if (rpc_process_pdu(rpc, buf, count) != 0) {
	132	rpc_set_error(rpc, "Invalid/garbage pdu received from server. Ignoring PDU");
	133	free(buf);
	134	return -1;
	135	}
	136	free(buf);
	137	return 0;
	138	}
	139
cdb19ec1 RS	140	/* read record marker, 4 bytes at the beginning of every pdu */
	141	if (rpc->inbuf == NULL) {
	142	rpc->insize = 4;
	143	rpc->inbuf = malloc(rpc->insize);
	144	if (rpc->inbuf == NULL) {
	145	rpc_set_error(rpc, "Failed to allocate buffer for record marker, errno:%d. Closing socket.", errno);
	146	return -1;
	147	}
	148	}
	149	if (rpc->inpos < 4) {
	150	size = 4 - rpc->inpos;
	151
	152	count = read(rpc->fd, rpc->inbuf + rpc->inpos, size);
	153	if (count == -1) {
	154	if (errno == EINTR) {
	155	return 0;
	156	}
	157	rpc_set_error(rpc, "Read from socket failed, errno:%d. Closing socket.", errno);
	158	return -1;
	159	}
	160	available -= count;
	161	rpc->inpos += count;
	162	}
	163
	164	if (available == 0) {
	165	return 0;
	166	}
	167
	168	pdu_size = rpc_get_pdu_size(rpc->inbuf);
	169	if (rpc->insize < pdu_size) {
	170	unsigned char *buf;
	171
	172	buf = malloc(pdu_size);
	173	if (buf == NULL) {
	174	rpc_set_error(rpc, "Failed to allocate buffer of %d bytes for pdu, errno:%d. Closing socket.", pdu_size, errno);
	175	return -1;
	176	}
	177	memcpy(buf, rpc->inbuf, rpc->insize);
	178	free(rpc->inbuf);
	179	rpc->inbuf = buf;
	180	rpc->insize = rpc_get_pdu_size(rpc->inbuf);
84004dbf	181	}
cdb19ec1 RS	182
	183	size = available;
	184	if (size > rpc->insize - rpc->inpos) {
	185	size = rpc->insize - rpc->inpos;
84004dbf RS	186	}
84004dbf RS	187
cdb19ec1	188	count = read(rpc->fd, rpc->inbuf + rpc->inpos, size);
84004dbf RS	189	if (count == -1) {
84004dbf RS	190	if (errno == EINTR) {
84004dbf RS	191	return 0;
	192	}
	193	rpc_set_error(rpc, "Read from socket failed, errno:%d. Closing socket.", errno);
1896d37b	194	return -1;
84004dbf	195	}
cdb19ec1 RS	196	available -= count;
cdb19ec1 RS	197	rpc->inpos += count;
84004dbf	198
cdb19ec1 RS	199	if (rpc->inpos == rpc->insize) {
cdb19ec1 RS	200	if (rpc_process_pdu(rpc, rpc->inbuf, pdu_size) != 0) {
84004dbf	201	rpc_set_error(rpc, "Invalid/garbage pdu received from server. Closing socket");
1896d37b	202	return -1;
84004dbf	203	}
cdb19ec1 RS	204	free(rpc->inbuf);
	205	rpc->inbuf = NULL;
	206	rpc->insize = 0;
	207	rpc->inpos = 0;
84004dbf	208	}
cdb19ec1	209
84004dbf RS	210	return 0;
	211	}
	212
	213
	214
	215	int rpc_service(struct rpc_context *rpc, int revents)
	216	{
	217	if (revents & POLLERR) {
912f7ad5 RS	218	int err = 0;
	219	socklen_t err_size = sizeof(err);
	220
	221	if (getsockopt(rpc->fd, SOL_SOCKET, SO_ERROR,
	222	&err, &err_size) != 0 \|\| err != 0) {
	223	if (err == 0) {
	224	err = errno;
	225	}
	226	rpc_set_error(rpc, "rpc_service: socket error "
	227	"%s(%d).",
	228	strerror(err), err);
84004dbf	229	} else {
912f7ad5 RS	230	rpc_set_error(rpc, "rpc_service: POLLERR, "
912f7ad5 RS	231	"Unknown socket error.");
84004dbf RS	232	}
	233	rpc->connect_cb(rpc, RPC_STATUS_ERROR, rpc->error_string, rpc->connect_data);
	234	return -1;
	235	}
	236	if (revents & POLLHUP) {
84004dbf RS	237	rpc_set_error(rpc, "Socket failed with POLLHUP");
84004dbf RS	238	rpc->connect_cb(rpc, RPC_STATUS_ERROR, rpc->error_string, rpc->connect_data);
1896d37b	239	return -1;
84004dbf RS	240	}
	241
	242	if (rpc->is_connected == 0 && rpc->fd != -1 && revents&POLLOUT) {
912f7ad5 RS	243	int err = 0;
	244	socklen_t err_size = sizeof(err);
	245
	246	if (getsockopt(rpc->fd, SOL_SOCKET, SO_ERROR,
	247	&err, &err_size) != 0 \|\| err != 0) {
	248	if (err == 0) {
	249	err = errno;
	250	}
	251	rpc_set_error(rpc, "rpc_service: socket error "
	252	"%s(%d) while connecting.",
	253	strerror(err), err);
	254	rpc->connect_cb(rpc, RPC_STATUS_ERROR,
	255	NULL, rpc->connect_data);
	256	return -1;
	257	}
	258
84004dbf RS	259	rpc->is_connected = 1;
	260	rpc->connect_cb(rpc, RPC_STATUS_SUCCESS, NULL, rpc->connect_data);
	261	return 0;
	262	}
	263
	264	if (revents & POLLOUT && rpc->outqueue != NULL) {
	265	if (rpc_write_to_socket(rpc) != 0) {
1896d37b RS	266	rpc_set_error(rpc, "write to socket failed");
1896d37b RS	267	return -1;
84004dbf RS	268	}
	269	}
	270
	271	if (revents & POLLIN) {
	272	if (rpc_read_from_socket(rpc) != 0) {
	273	rpc_disconnect(rpc, rpc_get_error(rpc));
1896d37b	274	return -1;
84004dbf RS	275	}
	276	}
	277
	278	return 0;
	279	}
	280
	281
	282	int rpc_connect_async(struct rpc_context rpc, const char server, int port, rpc_cb cb, void *private_data)
	283	{
	284	struct sockaddr_storage s;
	285	struct sockaddr_in sin = (struct sockaddr_in )&s;
	286	int socksize;
	287
	288	if (rpc->fd != -1) {
	289	rpc_set_error(rpc, "Trying to connect while already connected");
84004dbf RS	290	return -1;
	291	}
	292
070287e5 RS	293	if (rpc->is_udp != 0) {
	294	rpc_set_error(rpc, "Trying to connect on UDP socket");
	295	return -1;
	296	}
	297
84004dbf RS	298	sin->sin_family = AF_INET;
	299	sin->sin_port = htons(port);
	300	if (inet_pton(AF_INET, server, &sin->sin_addr) != 1) {
	301	rpc_set_error(rpc, "Not a valid server ip address");
1896d37b	302	return -1;
84004dbf RS	303	}
	304
	305	switch (s.ss_family) {
	306	case AF_INET:
84004dbf	307	socksize = sizeof(struct sockaddr_in);
ea214e45 RS	308	#ifdef HAVE_SOCK_SIN_LEN
	309	sin->sin_len = socksize;
	310	#endif
	311	rpc->fd = socket(AF_INET, SOCK_STREAM, 0);
84004dbf RS	312	break;
	313	}
	314
	315	if (rpc->fd == -1) {
	316	rpc_set_error(rpc, "Failed to open socket");
1896d37b	317	return -1;
84004dbf RS	318	}
	319
	320	rpc->connect_cb = cb;
	321	rpc->connect_data = private_data;
	322
	323	set_nonblocking(rpc->fd);
	324
	325	if (connect(rpc->fd, (struct sockaddr *)&s, socksize) != 0 && errno != EINPROGRESS) {
	326	rpc_set_error(rpc, "connect() to server failed");
1896d37b	327	return -1;
84004dbf RS	328	}
	329
	330	return 0;
	331	}
	332
	333	int rpc_disconnect(struct rpc_context rpc, char error)
	334	{
	335	if (rpc->fd != -1) {
	336	close(rpc->fd);
	337	}
	338	rpc->fd = -1;
	339
	340	rpc->is_connected = 0;
	341
	342	rpc_error_all_pdus(rpc, error);
	343
	344	return 0;
	345	}
485bc9b9 RS	346
	347
	348	int rpc_bind_udp(struct rpc_context rpc, char addr, int port)
	349	{
	350	struct addrinfo *ai = NULL;
	351	char service[6];
	352
	353	if (rpc->is_udp == 0) {
	354	rpc_set_error(rpc, "Cant not bind UDP. Not UDP context");
	355	return -1;
	356	}
	357
	358	snprintf(service, 6, "%d", port);
	359	if (getaddrinfo(addr, service, NULL, &ai) != 0) {
	360	rpc_set_error(rpc, "Invalid address:%s. "
	361	"Can not resolv into IPv4/v6 structure.");
	362	return -1;
	363	}
	364
	365	switch(ai->ai_family) {
	366	case AF_INET:
	367	rpc->fd = socket(ai->ai_family, SOCK_DGRAM, 0);
	368	if (rpc->fd == -1) {
	369	rpc_set_error(rpc, "Failed to create UDP socket: %s", strerror(errno));
	370	freeaddrinfo(ai);
	371	return -1;
	372	}
	373
	374	if (bind(rpc->fd, (struct sockaddr *)ai->ai_addr, sizeof(struct sockaddr_in)) != 0) {
	375	rpc_set_error(rpc, "Failed to bind to UDP socket: %s",strerror(errno));
	376	freeaddrinfo(ai);
	377	return -1;
	378	}
	379	break;
	380	default:
	381	rpc_set_error(rpc, "Can not handle UPD sockets of family %d yet", ai->ai_family);
	382	freeaddrinfo(ai);
	383	return -1;
	384	}
	385
	386	freeaddrinfo(ai);
	387
	388	return 0;
	389	}
	390