[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/>.
*/

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#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>
#ifdef HAVE_SYS_FILIO_H
#include <sys/filio.h>
#endif
#ifdef HAVE_SYS_SOCKIO_H
#include <sys/sockio.h>
#endif
#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 int rpc_disconnect_requeue(struct rpc_context *rpc);

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 & POLLIN) {
		if (rpc_read_from_socket(rpc) != 0) {
			rpc_disconnect_requeue(rpc);
			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;
		}
	}

	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_SOCKADDR_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;
}

/* disconnect but do not error all PDUs, just move pdus in-flight back to the outqueue */
static int rpc_disconnect_requeue(struct rpc_context *rpc)
{
	struct rpc_pdu *pdu;

	if (rpc->fd != -1) {
		close(rpc->fd);
	}
	rpc->fd  = -1;

	rpc->is_connected = 0;

	/* socket is closed so we will not get any replies to any commands
	 * in flight. Move them all over from the waitpdu queue back to the out queue
	 */
	for (pdu=rpc->waitpdu; pdu; pdu=pdu->next) {
		SLIST_REMOVE(&rpc->waitpdu, pdu);
		SLIST_ADD(&rpc->outqueue, pdu);
	}

	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;
}

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

	if (rpc->is_udp == 0) {
		rpc_set_error(rpc, "Can not set destination sockaddr. 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;
 	}

	if (rpc->udp_dest) {
		free(rpc->udp_dest);
		rpc->udp_dest = NULL;
	}
	rpc->udp_dest = malloc(ai->ai_addrlen);
	if (rpc->udp_dest == NULL) {
		rpc_set_error(rpc, "Out of memory. Failed to allocate sockaddr structure");
		return -1;
	}
	memcpy(rpc->udp_dest, ai->ai_addr, ai->ai_addrlen);
	freeaddrinfo(ai);

	rpc->is_broadcast = is_broadcast;
	setsockopt(rpc->fd, SOL_SOCKET, SO_BROADCAST, &is_broadcast, sizeof(is_broadcast));

	return 0;
}

struct sockaddr *rpc_get_recv_sockaddr(struct rpc_context *rpc)
{
	return (struct sockaddr *)&rpc->udp_src;
}
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
fc01d2a9 TN	18	#ifdef HAVE_CONFIG_H
	19	#include "config.h"
	20	#endif
84004dbf	21	#include <stdio.h>
98f5fee8	22	#include <stdlib.h>
84004dbf RS	23	#include <unistd.h>
	24	#include <fcntl.h>
	25	#include <poll.h>
	26	#include <string.h>
	27	#include <errno.h>
98f5fee8	28	#include <rpc/rpc.h>
84004dbf RS	29	#include <rpc/xdr.h>
84004dbf RS	30	#include <arpa/inet.h>
fc01d2a9 TN	31	#ifdef HAVE_SYS_FILIO_H
	32	#include <sys/filio.h>
	33	#endif
647d2ea1 RS	34	#ifdef HAVE_SYS_SOCKIO_H
	35	#include <sys/sockio.h>
	36	#endif
84004dbf	37	#include <sys/ioctl.h>
485bc9b9 RS	38	#include <sys/types.h>
	39	#include <sys/socket.h>
	40	#include <netdb.h>
84004dbf RS	41	#include "libnfs.h"
	42	#include "libnfs-raw.h"
	43	#include "libnfs-private.h"
	44	#include "slist.h"
	45
b077fdeb RS	46	static int rpc_disconnect_requeue(struct rpc_context *rpc);
b077fdeb RS	47
84004dbf RS	48	static void set_nonblocking(int fd)
	49	{
	50	unsigned v;
	51	v = fcntl(fd, F_GETFL, 0);
	52	fcntl(fd, F_SETFL, v \| O_NONBLOCK);
	53	}
	54
	55	int rpc_get_fd(struct rpc_context *rpc)
	56	{
	57	return rpc->fd;
	58	}
	59
	60	int rpc_which_events(struct rpc_context *rpc)
	61	{
912f7ad5	62	int events = rpc->is_connected ? POLLIN : POLLOUT;
84004dbf	63
5911f3e8 RS	64	if (rpc->is_udp != 0) {
	65	/* for udp sockets we only wait for pollin */
	66	return POLLIN;
	67	}
	68
84004dbf RS	69	if (rpc->outqueue) {
	70	events \|= POLLOUT;
	71	}
	72	return events;
	73	}
	74
	75	static int rpc_write_to_socket(struct rpc_context *rpc)
	76	{
	77	ssize_t count;
	78
	79	if (rpc == NULL) {
84004dbf RS	80	return -1;
	81	}
	82	if (rpc->fd == -1) {
1896d37b RS	83	rpc_set_error(rpc, "trying to write but not connected");
1896d37b RS	84	return -1;
84004dbf RS	85	}
	86
	87	while (rpc->outqueue != NULL) {
	88	ssize_t total;
	89
	90	total = rpc->outqueue->outdata.size;
	91
	92	count = write(rpc->fd, rpc->outqueue->outdata.data + rpc->outqueue->written, total - rpc->outqueue->written);
	93	if (count == -1) {
	94	if (errno == EAGAIN \|\| errno == EWOULDBLOCK) {
84004dbf RS	95	return 0;
84004dbf RS	96	}
1896d37b RS	97	rpc_set_error(rpc, "Error when writing to socket :%s(%d)", strerror(errno), errno);
1896d37b RS	98	return -1;
84004dbf RS	99	}
	100
	101	rpc->outqueue->written += count;
	102	if (rpc->outqueue->written == total) {
	103	struct rpc_pdu *pdu = rpc->outqueue;
	104
	105	SLIST_REMOVE(&rpc->outqueue, pdu);
	106	SLIST_ADD_END(&rpc->waitpdu, pdu);
	107	}
	108	}
	109	return 0;
	110	}
	111
	112	static int rpc_read_from_socket(struct rpc_context *rpc)
	113	{
	114	int available;
	115	int size;
cdb19ec1	116	int pdu_size;
84004dbf RS	117	ssize_t count;
	118
	119	if (ioctl(rpc->fd, FIONREAD, &available) != 0) {
	120	rpc_set_error(rpc, "Ioctl FIONREAD returned error : %d. Closing socket.", errno);
	121	return -1;
	122	}
	123	if (available == 0) {
	124	rpc_set_error(rpc, "Socket has been closed");
1896d37b	125	return -1;
84004dbf	126	}
cdb19ec1	127
0268794f RS	128	if (rpc->is_udp) {
	129	char *buf;
	130	socklen_t socklen = sizeof(rpc->udp_src);
	131
	132	buf = malloc(available);
	133	if (buf == NULL) {
	134	rpc_set_error(rpc, "Failed to malloc buffer for recvfrom");
	135	return -1;
	136	}
	137	count = recvfrom(rpc->fd, buf, available, MSG_DONTWAIT, (struct sockaddr *)&rpc->udp_src, &socklen);
	138	if (count < 0) {
	139	rpc_set_error(rpc, "Failed recvfrom: %s", strerror(errno));
	140	free(buf);
	141	}
	142	if (rpc_process_pdu(rpc, buf, count) != 0) {
	143	rpc_set_error(rpc, "Invalid/garbage pdu received from server. Ignoring PDU");
	144	free(buf);
	145	return -1;
	146	}
	147	free(buf);
	148	return 0;
	149	}
	150
cdb19ec1 RS	151	/* read record marker, 4 bytes at the beginning of every pdu */
	152	if (rpc->inbuf == NULL) {
	153	rpc->insize = 4;
	154	rpc->inbuf = malloc(rpc->insize);
	155	if (rpc->inbuf == NULL) {
	156	rpc_set_error(rpc, "Failed to allocate buffer for record marker, errno:%d. Closing socket.", errno);
	157	return -1;
	158	}
	159	}
	160	if (rpc->inpos < 4) {
	161	size = 4 - rpc->inpos;
	162
	163	count = read(rpc->fd, rpc->inbuf + rpc->inpos, size);
	164	if (count == -1) {
	165	if (errno == EINTR) {
	166	return 0;
	167	}
	168	rpc_set_error(rpc, "Read from socket failed, errno:%d. Closing socket.", errno);
	169	return -1;
	170	}
	171	available -= count;
	172	rpc->inpos += count;
	173	}
	174
	175	if (available == 0) {
	176	return 0;
	177	}
	178
	179	pdu_size = rpc_get_pdu_size(rpc->inbuf);
	180	if (rpc->insize < pdu_size) {
	181	unsigned char *buf;
	182
	183	buf = malloc(pdu_size);
	184	if (buf == NULL) {
	185	rpc_set_error(rpc, "Failed to allocate buffer of %d bytes for pdu, errno:%d. Closing socket.", pdu_size, errno);
	186	return -1;
	187	}
	188	memcpy(buf, rpc->inbuf, rpc->insize);
	189	free(rpc->inbuf);
	190	rpc->inbuf = buf;
	191	rpc->insize = rpc_get_pdu_size(rpc->inbuf);
84004dbf	192	}
cdb19ec1 RS	193
	194	size = available;
	195	if (size > rpc->insize - rpc->inpos) {
	196	size = rpc->insize - rpc->inpos;
84004dbf RS	197	}
84004dbf RS	198
cdb19ec1	199	count = read(rpc->fd, rpc->inbuf + rpc->inpos, size);
84004dbf RS	200	if (count == -1) {
84004dbf RS	201	if (errno == EINTR) {
84004dbf RS	202	return 0;
	203	}
	204	rpc_set_error(rpc, "Read from socket failed, errno:%d. Closing socket.", errno);
1896d37b	205	return -1;
84004dbf	206	}
cdb19ec1 RS	207	available -= count;
cdb19ec1 RS	208	rpc->inpos += count;
84004dbf	209
cdb19ec1 RS	210	if (rpc->inpos == rpc->insize) {
cdb19ec1 RS	211	if (rpc_process_pdu(rpc, rpc->inbuf, pdu_size) != 0) {
84004dbf	212	rpc_set_error(rpc, "Invalid/garbage pdu received from server. Closing socket");
1896d37b	213	return -1;
84004dbf	214	}
cdb19ec1 RS	215	free(rpc->inbuf);
	216	rpc->inbuf = NULL;
	217	rpc->insize = 0;
	218	rpc->inpos = 0;
84004dbf	219	}
cdb19ec1	220
84004dbf RS	221	return 0;
	222	}
	223
	224
	225
	226	int rpc_service(struct rpc_context *rpc, int revents)
	227	{
	228	if (revents & POLLERR) {
912f7ad5 RS	229	int err = 0;
	230	socklen_t err_size = sizeof(err);
	231
	232	if (getsockopt(rpc->fd, SOL_SOCKET, SO_ERROR,
	233	&err, &err_size) != 0 \|\| err != 0) {
	234	if (err == 0) {
	235	err = errno;
	236	}
	237	rpc_set_error(rpc, "rpc_service: socket error "
	238	"%s(%d).",
	239	strerror(err), err);
84004dbf	240	} else {
912f7ad5 RS	241	rpc_set_error(rpc, "rpc_service: POLLERR, "
912f7ad5 RS	242	"Unknown socket error.");
84004dbf RS	243	}
	244	rpc->connect_cb(rpc, RPC_STATUS_ERROR, rpc->error_string, rpc->connect_data);
	245	return -1;
	246	}
	247	if (revents & POLLHUP) {
84004dbf RS	248	rpc_set_error(rpc, "Socket failed with POLLHUP");
84004dbf RS	249	rpc->connect_cb(rpc, RPC_STATUS_ERROR, rpc->error_string, rpc->connect_data);
1896d37b	250	return -1;
84004dbf RS	251	}
	252
	253	if (rpc->is_connected == 0 && rpc->fd != -1 && revents&POLLOUT) {
912f7ad5 RS	254	int err = 0;
	255	socklen_t err_size = sizeof(err);
	256
	257	if (getsockopt(rpc->fd, SOL_SOCKET, SO_ERROR,
	258	&err, &err_size) != 0 \|\| err != 0) {
	259	if (err == 0) {
	260	err = errno;
	261	}
	262	rpc_set_error(rpc, "rpc_service: socket error "
	263	"%s(%d) while connecting.",
	264	strerror(err), err);
	265	rpc->connect_cb(rpc, RPC_STATUS_ERROR,
	266	NULL, rpc->connect_data);
	267	return -1;
	268	}
	269
84004dbf RS	270	rpc->is_connected = 1;
	271	rpc->connect_cb(rpc, RPC_STATUS_SUCCESS, NULL, rpc->connect_data);
	272	return 0;
	273	}
	274
b077fdeb RS	275	if (revents & POLLIN) {
	276	if (rpc_read_from_socket(rpc) != 0) {
	277	rpc_disconnect_requeue(rpc);
	278	return 0;
84004dbf RS	279	}
	280	}
	281
b077fdeb RS	282	if (revents & POLLOUT && rpc->outqueue != NULL) {
	283	if (rpc_write_to_socket(rpc) != 0) {
	284	rpc_set_error(rpc, "write to socket failed");
1896d37b	285	return -1;
84004dbf RS	286	}
	287	}
	288
	289	return 0;
	290	}
	291
	292
	293	int rpc_connect_async(struct rpc_context rpc, const char server, int port, rpc_cb cb, void *private_data)
	294	{
	295	struct sockaddr_storage s;
	296	struct sockaddr_in sin = (struct sockaddr_in )&s;
	297	int socksize;
	298
	299	if (rpc->fd != -1) {
	300	rpc_set_error(rpc, "Trying to connect while already connected");
84004dbf RS	301	return -1;
	302	}
	303
070287e5 RS	304	if (rpc->is_udp != 0) {
	305	rpc_set_error(rpc, "Trying to connect on UDP socket");
	306	return -1;
	307	}
	308
84004dbf RS	309	sin->sin_family = AF_INET;
	310	sin->sin_port = htons(port);
	311	if (inet_pton(AF_INET, server, &sin->sin_addr) != 1) {
	312	rpc_set_error(rpc, "Not a valid server ip address");
1896d37b	313	return -1;
84004dbf RS	314	}
	315
	316	switch (s.ss_family) {
	317	case AF_INET:
84004dbf	318	socksize = sizeof(struct sockaddr_in);
f7f931c7	319	#ifdef HAVE_SOCKADDR_LEN
ea214e45 RS	320	sin->sin_len = socksize;
	321	#endif
	322	rpc->fd = socket(AF_INET, SOCK_STREAM, 0);
84004dbf RS	323	break;
	324	}
	325
	326	if (rpc->fd == -1) {
	327	rpc_set_error(rpc, "Failed to open socket");
1896d37b	328	return -1;
84004dbf RS	329	}
	330
	331	rpc->connect_cb = cb;
	332	rpc->connect_data = private_data;
	333
	334	set_nonblocking(rpc->fd);
	335
	336	if (connect(rpc->fd, (struct sockaddr *)&s, socksize) != 0 && errno != EINPROGRESS) {
	337	rpc_set_error(rpc, "connect() to server failed");
1896d37b	338	return -1;
84004dbf RS	339	}
	340
	341	return 0;
	342	}
	343
	344	int rpc_disconnect(struct rpc_context rpc, char error)
	345	{
	346	if (rpc->fd != -1) {
	347	close(rpc->fd);
	348	}
	349	rpc->fd = -1;
	350
	351	rpc->is_connected = 0;
	352
	353	rpc_error_all_pdus(rpc, error);
	354
	355	return 0;
	356	}
485bc9b9	357
b077fdeb RS	358	/* disconnect but do not error all PDUs, just move pdus in-flight back to the outqueue */
	359	static int rpc_disconnect_requeue(struct rpc_context *rpc)
	360	{
	361	struct rpc_pdu *pdu;
	362
	363	if (rpc->fd != -1) {
	364	close(rpc->fd);
	365	}
	366	rpc->fd = -1;
	367
	368	rpc->is_connected = 0;
	369
	370	/* socket is closed so we will not get any replies to any commands
	371	* in flight. Move them all over from the waitpdu queue back to the out queue
	372	*/
	373	for (pdu=rpc->waitpdu; pdu; pdu=pdu->next) {
	374	SLIST_REMOVE(&rpc->waitpdu, pdu);
	375	SLIST_ADD(&rpc->outqueue, pdu);
	376	}
	377
	378	return 0;
	379	}
	380
485bc9b9 RS	381
	382	int rpc_bind_udp(struct rpc_context rpc, char addr, int port)
	383	{
	384	struct addrinfo *ai = NULL;
	385	char service[6];
	386
	387	if (rpc->is_udp == 0) {
	388	rpc_set_error(rpc, "Cant not bind UDP. Not UDP context");
	389	return -1;
	390	}
	391
	392	snprintf(service, 6, "%d", port);
	393	if (getaddrinfo(addr, service, NULL, &ai) != 0) {
	394	rpc_set_error(rpc, "Invalid address:%s. "
	395	"Can not resolv into IPv4/v6 structure.");
	396	return -1;
	397	}
	398
	399	switch(ai->ai_family) {
	400	case AF_INET:
	401	rpc->fd = socket(ai->ai_family, SOCK_DGRAM, 0);
	402	if (rpc->fd == -1) {
	403	rpc_set_error(rpc, "Failed to create UDP socket: %s", strerror(errno));
	404	freeaddrinfo(ai);
	405	return -1;
	406	}
	407
	408	if (bind(rpc->fd, (struct sockaddr *)ai->ai_addr, sizeof(struct sockaddr_in)) != 0) {
	409	rpc_set_error(rpc, "Failed to bind to UDP socket: %s",strerror(errno));
	410	freeaddrinfo(ai);
	411	return -1;
	412	}
	413	break;
	414	default:
	415	rpc_set_error(rpc, "Can not handle UPD sockets of family %d yet", ai->ai_family);
	416	freeaddrinfo(ai);
	417	return -1;
	418	}
	419
	420	freeaddrinfo(ai);
	421
	422	return 0;
	423	}
	424
5bf60dc6 RS	425	int rpc_set_udp_destination(struct rpc_context rpc, char addr, int port, int is_broadcast)
	426	{
	427	struct addrinfo *ai = NULL;
	428	char service[6];
	429
	430	if (rpc->is_udp == 0) {
	431	rpc_set_error(rpc, "Can not set destination sockaddr. Not UDP context");
	432	return -1;
	433	}
	434
	435	snprintf(service, 6, "%d", port);
	436	if (getaddrinfo(addr, service, NULL, &ai) != 0) {
	437	rpc_set_error(rpc, "Invalid address:%s. "
	438	"Can not resolv into IPv4/v6 structure.");
	439	return -1;
	440	}
	441
	442	if (rpc->udp_dest) {
	443	free(rpc->udp_dest);
	444	rpc->udp_dest = NULL;
	445	}
	446	rpc->udp_dest = malloc(ai->ai_addrlen);
	447	if (rpc->udp_dest == NULL) {
	448	rpc_set_error(rpc, "Out of memory. Failed to allocate sockaddr structure");
	449	return -1;
	450	}
	451	memcpy(rpc->udp_dest, ai->ai_addr, ai->ai_addrlen);
	452	freeaddrinfo(ai);
	453
	454	rpc->is_broadcast = is_broadcast;
	455	setsockopt(rpc->fd, SOL_SOCKET, SO_BROADCAST, &is_broadcast, sizeof(is_broadcast));
	456
	457	return 0;
	458	}
c481da67 RS	459
	460	struct sockaddr rpc_get_recv_sockaddr(struct rpc_context rpc)
	461	{
	462	return (struct sockaddr *)&rpc->udp_src;
	463	}