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