[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/>.
*/

#if defined(WIN32)
#include <winsock2.h>
#include <ws2tcpip.h>
#include <basetsd.h>
#define ssize_t SSIZE_T
#define MSG_DONTWAIT 0
#else
#include <unistd.h>
#include <poll.h>
#include <arpa/inet.h>
#include <sys/ioctl.h>
#include <sys/socket.h>
#include <netdb.h>
#endif

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <stdio.h>
#include <stdlib.h>
#include <fcntl.h>
#include <string.h>
#include <errno.h>
#include <rpc/rpc.h>
#include <rpc/xdr.h>
#ifdef HAVE_SYS_FILIO_H
#include <sys/filio.h>
#endif
#include <sys/types.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)
{
#if defined(WIN32)
#else
	unsigned v;
	v = fcntl(fd, F_GETFL, 0);
        fcntl(fd, F_SETFL, v | O_NONBLOCK);
#endif
}

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;

#if defined(WIN32)
		count = send(rpc->fd, rpc->outqueue->outdata.data + rpc->outqueue->written, total - rpc->outqueue->written, 0);
#else
		count = write(rpc->fd, rpc->outqueue->outdata.data + rpc->outqueue->written, total - rpc->outqueue->written);
#endif
		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 defined(WIN32)
	if (ioctlsocket(rpc->fd, FIONREAD, &available) != 0) {
#else
	if (ioctl(rpc->fd, FIONREAD, &available) != 0) {
#endif
		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;

#if defined(WIN32)
		count = recv(rpc->fd, rpc->inbuf + rpc->inpos, size, 0);
#else
		count = read(rpc->fd, rpc->inbuf + rpc->inpos, size);
#endif
		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;
	}

#if defined(WIN32)
	count = recv(rpc->fd, rpc->inbuf + rpc->inpos, size, 0);
#else
	count = read(rpc->fd, rpc->inbuf + rpc->inpos, size);
#endif
	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, IPPROTO_TCP);
		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) {
#if defined(WIN32)
		closesocket(rpc->fd);
#else
		close(rpc->fd);
#endif
	}
	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) {
#if defined(WIN32)
		closesocket(rpc->fd);
#else
		close(rpc->fd);
#endif
	}
	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;
	}

	sprintf(service, "%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;
	}

	sprintf(service, "%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
6874f61e RS	18	#if defined(WIN32)
	19	#include <winsock2.h>
	20	#include <ws2tcpip.h>
	21	#include <basetsd.h>
	22	#define ssize_t SSIZE_T
	23	#define MSG_DONTWAIT 0
	24	#else
	25	#include <unistd.h>
	26	#include <poll.h>
	27	#include <arpa/inet.h>
	28	#include <sys/ioctl.h>
	29	#include <sys/socket.h>
	30	#include <netdb.h>
	31	#endif
	32
fc01d2a9 TN	33	#ifdef HAVE_CONFIG_H
	34	#include "config.h"
	35	#endif
84004dbf	36	#include <stdio.h>
98f5fee8	37	#include <stdlib.h>
84004dbf	38	#include <fcntl.h>
84004dbf RS	39	#include <string.h>
84004dbf RS	40	#include <errno.h>
98f5fee8	41	#include <rpc/rpc.h>
84004dbf	42	#include <rpc/xdr.h>
fc01d2a9 TN	43	#ifdef HAVE_SYS_FILIO_H
	44	#include <sys/filio.h>
	45	#endif
485bc9b9	46	#include <sys/types.h>
84004dbf RS	47	#include "libnfs.h"
	48	#include "libnfs-raw.h"
	49	#include "libnfs-private.h"
	50	#include "slist.h"
	51
b077fdeb RS	52	static int rpc_disconnect_requeue(struct rpc_context *rpc);
b077fdeb RS	53
84004dbf RS	54	static void set_nonblocking(int fd)
84004dbf RS	55	{
6874f61e RS	56	#if defined(WIN32)
6874f61e RS	57	#else
84004dbf RS	58	unsigned v;
	59	v = fcntl(fd, F_GETFL, 0);
	60	fcntl(fd, F_SETFL, v \| O_NONBLOCK);
6874f61e	61	#endif
84004dbf RS	62	}
	63
	64	int rpc_get_fd(struct rpc_context *rpc)
	65	{
	66	return rpc->fd;
	67	}
	68
	69	int rpc_which_events(struct rpc_context *rpc)
	70	{
912f7ad5	71	int events = rpc->is_connected ? POLLIN : POLLOUT;
84004dbf	72
5911f3e8 RS	73	if (rpc->is_udp != 0) {
	74	/* for udp sockets we only wait for pollin */
	75	return POLLIN;
	76	}
	77
84004dbf RS	78	if (rpc->outqueue) {
	79	events \|= POLLOUT;
	80	}
	81	return events;
	82	}
	83
	84	static int rpc_write_to_socket(struct rpc_context *rpc)
	85	{
	86	ssize_t count;
	87
	88	if (rpc == NULL) {
84004dbf RS	89	return -1;
	90	}
	91	if (rpc->fd == -1) {
1896d37b RS	92	rpc_set_error(rpc, "trying to write but not connected");
1896d37b RS	93	return -1;
84004dbf RS	94	}
	95
	96	while (rpc->outqueue != NULL) {
	97	ssize_t total;
	98
	99	total = rpc->outqueue->outdata.size;
	100
6874f61e RS	101	#if defined(WIN32)
	102	count = send(rpc->fd, rpc->outqueue->outdata.data + rpc->outqueue->written, total - rpc->outqueue->written, 0);
	103	#else
84004dbf	104	count = write(rpc->fd, rpc->outqueue->outdata.data + rpc->outqueue->written, total - rpc->outqueue->written);
6874f61e	105	#endif
84004dbf RS	106	if (count == -1) {
84004dbf RS	107	if (errno == EAGAIN \|\| errno == EWOULDBLOCK) {
84004dbf RS	108	return 0;
84004dbf RS	109	}
1896d37b RS	110	rpc_set_error(rpc, "Error when writing to socket :%s(%d)", strerror(errno), errno);
1896d37b RS	111	return -1;
84004dbf RS	112	}
	113
	114	rpc->outqueue->written += count;
	115	if (rpc->outqueue->written == total) {
	116	struct rpc_pdu *pdu = rpc->outqueue;
	117
	118	SLIST_REMOVE(&rpc->outqueue, pdu);
	119	SLIST_ADD_END(&rpc->waitpdu, pdu);
	120	}
	121	}
	122	return 0;
	123	}
	124
	125	static int rpc_read_from_socket(struct rpc_context *rpc)
	126	{
	127	int available;
	128	int size;
cdb19ec1	129	int pdu_size;
84004dbf RS	130	ssize_t count;
84004dbf RS	131
6874f61e RS	132	#if defined(WIN32)
	133	if (ioctlsocket(rpc->fd, FIONREAD, &available) != 0) {
	134	#else
84004dbf	135	if (ioctl(rpc->fd, FIONREAD, &available) != 0) {
6874f61e	136	#endif
84004dbf RS	137	rpc_set_error(rpc, "Ioctl FIONREAD returned error : %d. Closing socket.", errno);
	138	return -1;
	139	}
	140	if (available == 0) {
	141	rpc_set_error(rpc, "Socket has been closed");
1896d37b	142	return -1;
84004dbf	143	}
cdb19ec1	144
0268794f RS	145	if (rpc->is_udp) {
	146	char *buf;
	147	socklen_t socklen = sizeof(rpc->udp_src);
	148
	149	buf = malloc(available);
	150	if (buf == NULL) {
	151	rpc_set_error(rpc, "Failed to malloc buffer for recvfrom");
	152	return -1;
	153	}
	154	count = recvfrom(rpc->fd, buf, available, MSG_DONTWAIT, (struct sockaddr *)&rpc->udp_src, &socklen);
	155	if (count < 0) {
	156	rpc_set_error(rpc, "Failed recvfrom: %s", strerror(errno));
	157	free(buf);
	158	}
	159	if (rpc_process_pdu(rpc, buf, count) != 0) {
	160	rpc_set_error(rpc, "Invalid/garbage pdu received from server. Ignoring PDU");
	161	free(buf);
	162	return -1;
	163	}
	164	free(buf);
	165	return 0;
	166	}
	167
cdb19ec1 RS	168	/* read record marker, 4 bytes at the beginning of every pdu */
	169	if (rpc->inbuf == NULL) {
	170	rpc->insize = 4;
	171	rpc->inbuf = malloc(rpc->insize);
	172	if (rpc->inbuf == NULL) {
	173	rpc_set_error(rpc, "Failed to allocate buffer for record marker, errno:%d. Closing socket.", errno);
	174	return -1;
	175	}
	176	}
	177	if (rpc->inpos < 4) {
	178	size = 4 - rpc->inpos;
	179
6874f61e RS	180	#if defined(WIN32)
	181	count = recv(rpc->fd, rpc->inbuf + rpc->inpos, size, 0);
	182	#else
cdb19ec1	183	count = read(rpc->fd, rpc->inbuf + rpc->inpos, size);
6874f61e	184	#endif
cdb19ec1 RS	185	if (count == -1) {
	186	if (errno == EINTR) {
	187	return 0;
	188	}
	189	rpc_set_error(rpc, "Read from socket failed, errno:%d. Closing socket.", errno);
	190	return -1;
	191	}
	192	available -= count;
	193	rpc->inpos += count;
	194	}
	195
	196	if (available == 0) {
	197	return 0;
	198	}
	199
	200	pdu_size = rpc_get_pdu_size(rpc->inbuf);
	201	if (rpc->insize < pdu_size) {
	202	unsigned char *buf;
	203
	204	buf = malloc(pdu_size);
	205	if (buf == NULL) {
	206	rpc_set_error(rpc, "Failed to allocate buffer of %d bytes for pdu, errno:%d. Closing socket.", pdu_size, errno);
	207	return -1;
	208	}
	209	memcpy(buf, rpc->inbuf, rpc->insize);
	210	free(rpc->inbuf);
	211	rpc->inbuf = buf;
	212	rpc->insize = rpc_get_pdu_size(rpc->inbuf);
84004dbf	213	}
cdb19ec1 RS	214
	215	size = available;
	216	if (size > rpc->insize - rpc->inpos) {
	217	size = rpc->insize - rpc->inpos;
84004dbf RS	218	}
84004dbf RS	219
6874f61e RS	220	#if defined(WIN32)
	221	count = recv(rpc->fd, rpc->inbuf + rpc->inpos, size, 0);
	222	#else
cdb19ec1	223	count = read(rpc->fd, rpc->inbuf + rpc->inpos, size);
6874f61e	224	#endif
84004dbf RS	225	if (count == -1) {
84004dbf RS	226	if (errno == EINTR) {
84004dbf RS	227	return 0;
	228	}
	229	rpc_set_error(rpc, "Read from socket failed, errno:%d. Closing socket.", errno);
1896d37b	230	return -1;
84004dbf	231	}
cdb19ec1 RS	232	available -= count;
cdb19ec1 RS	233	rpc->inpos += count;
84004dbf	234
cdb19ec1 RS	235	if (rpc->inpos == rpc->insize) {
cdb19ec1 RS	236	if (rpc_process_pdu(rpc, rpc->inbuf, pdu_size) != 0) {
84004dbf	237	rpc_set_error(rpc, "Invalid/garbage pdu received from server. Closing socket");
1896d37b	238	return -1;
84004dbf	239	}
cdb19ec1 RS	240	free(rpc->inbuf);
	241	rpc->inbuf = NULL;
	242	rpc->insize = 0;
	243	rpc->inpos = 0;
84004dbf	244	}
cdb19ec1	245
84004dbf RS	246	return 0;
	247	}
	248
	249
	250
	251	int rpc_service(struct rpc_context *rpc, int revents)
	252	{
	253	if (revents & POLLERR) {
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).",
	264	strerror(err), err);
84004dbf	265	} else {
912f7ad5 RS	266	rpc_set_error(rpc, "rpc_service: POLLERR, "
912f7ad5 RS	267	"Unknown socket error.");
84004dbf RS	268	}
	269	rpc->connect_cb(rpc, RPC_STATUS_ERROR, rpc->error_string, rpc->connect_data);
	270	return -1;
	271	}
	272	if (revents & POLLHUP) {
84004dbf RS	273	rpc_set_error(rpc, "Socket failed with POLLHUP");
84004dbf RS	274	rpc->connect_cb(rpc, RPC_STATUS_ERROR, rpc->error_string, rpc->connect_data);
1896d37b	275	return -1;
84004dbf RS	276	}
	277
	278	if (rpc->is_connected == 0 && rpc->fd != -1 && revents&POLLOUT) {
912f7ad5 RS	279	int err = 0;
	280	socklen_t err_size = sizeof(err);
	281
	282	if (getsockopt(rpc->fd, SOL_SOCKET, SO_ERROR,
	283	&err, &err_size) != 0 \|\| err != 0) {
	284	if (err == 0) {
	285	err = errno;
	286	}
	287	rpc_set_error(rpc, "rpc_service: socket error "
	288	"%s(%d) while connecting.",
	289	strerror(err), err);
	290	rpc->connect_cb(rpc, RPC_STATUS_ERROR,
	291	NULL, rpc->connect_data);
	292	return -1;
	293	}
	294
84004dbf RS	295	rpc->is_connected = 1;
	296	rpc->connect_cb(rpc, RPC_STATUS_SUCCESS, NULL, rpc->connect_data);
	297	return 0;
	298	}
	299
b077fdeb RS	300	if (revents & POLLIN) {
	301	if (rpc_read_from_socket(rpc) != 0) {
	302	rpc_disconnect_requeue(rpc);
	303	return 0;
84004dbf RS	304	}
	305	}
	306
b077fdeb RS	307	if (revents & POLLOUT && rpc->outqueue != NULL) {
	308	if (rpc_write_to_socket(rpc) != 0) {
	309	rpc_set_error(rpc, "write to socket failed");
1896d37b	310	return -1;
84004dbf RS	311	}
	312	}
	313
	314	return 0;
	315	}
	316
	317
	318	int rpc_connect_async(struct rpc_context rpc, const char server, int port, rpc_cb cb, void *private_data)
	319	{
	320	struct sockaddr_storage s;
	321	struct sockaddr_in sin = (struct sockaddr_in )&s;
	322	int socksize;
	323
	324	if (rpc->fd != -1) {
	325	rpc_set_error(rpc, "Trying to connect while already connected");
84004dbf RS	326	return -1;
	327	}
	328
070287e5 RS	329	if (rpc->is_udp != 0) {
	330	rpc_set_error(rpc, "Trying to connect on UDP socket");
	331	return -1;
	332	}
	333
84004dbf RS	334	sin->sin_family = AF_INET;
	335	sin->sin_port = htons(port);
	336	if (inet_pton(AF_INET, server, &sin->sin_addr) != 1) {
	337	rpc_set_error(rpc, "Not a valid server ip address");
1896d37b	338	return -1;
84004dbf RS	339	}
	340
	341	switch (s.ss_family) {
	342	case AF_INET:
84004dbf	343	socksize = sizeof(struct sockaddr_in);
f7f931c7	344	#ifdef HAVE_SOCKADDR_LEN
ea214e45 RS	345	sin->sin_len = socksize;
ea214e45 RS	346	#endif
6874f61e	347	rpc->fd = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
84004dbf RS	348	break;
	349	}
	350
	351	if (rpc->fd == -1) {
	352	rpc_set_error(rpc, "Failed to open socket");
1896d37b	353	return -1;
84004dbf RS	354	}
	355
	356	rpc->connect_cb = cb;
	357	rpc->connect_data = private_data;
	358
	359	set_nonblocking(rpc->fd);
	360
	361	if (connect(rpc->fd, (struct sockaddr *)&s, socksize) != 0 && errno != EINPROGRESS) {
	362	rpc_set_error(rpc, "connect() to server failed");
1896d37b	363	return -1;
84004dbf RS	364	}
	365
	366	return 0;
	367	}
	368
	369	int rpc_disconnect(struct rpc_context rpc, char error)
	370	{
	371	if (rpc->fd != -1) {
6874f61e RS	372	#if defined(WIN32)
	373	closesocket(rpc->fd);
	374	#else
84004dbf	375	close(rpc->fd);
6874f61e	376	#endif
84004dbf RS	377	}
	378	rpc->fd = -1;
	379
	380	rpc->is_connected = 0;
	381
	382	rpc_error_all_pdus(rpc, error);
	383
	384	return 0;
	385	}
485bc9b9	386
b077fdeb RS	387	/* disconnect but do not error all PDUs, just move pdus in-flight back to the outqueue */
	388	static int rpc_disconnect_requeue(struct rpc_context *rpc)
	389	{
	390	struct rpc_pdu *pdu;
	391
	392	if (rpc->fd != -1) {
6874f61e RS	393	#if defined(WIN32)
	394	closesocket(rpc->fd);
	395	#else
b077fdeb	396	close(rpc->fd);
6874f61e	397	#endif
b077fdeb RS	398	}
	399	rpc->fd = -1;
	400
	401	rpc->is_connected = 0;
	402
	403	/* socket is closed so we will not get any replies to any commands
	404	* in flight. Move them all over from the waitpdu queue back to the out queue
	405	*/
	406	for (pdu=rpc->waitpdu; pdu; pdu=pdu->next) {
	407	SLIST_REMOVE(&rpc->waitpdu, pdu);
	408	SLIST_ADD(&rpc->outqueue, pdu);
	409	}
	410
	411	return 0;
	412	}
	413
485bc9b9 RS	414
	415	int rpc_bind_udp(struct rpc_context rpc, char addr, int port)
	416	{
	417	struct addrinfo *ai = NULL;
	418	char service[6];
	419
	420	if (rpc->is_udp == 0) {
	421	rpc_set_error(rpc, "Cant not bind UDP. Not UDP context");
	422	return -1;
	423	}
	424
6874f61e	425	sprintf(service, "%d", port);
485bc9b9 RS	426	if (getaddrinfo(addr, service, NULL, &ai) != 0) {
	427	rpc_set_error(rpc, "Invalid address:%s. "
	428	"Can not resolv into IPv4/v6 structure.");
	429	return -1;
	430	}
	431
	432	switch(ai->ai_family) {
	433	case AF_INET:
	434	rpc->fd = socket(ai->ai_family, SOCK_DGRAM, 0);
	435	if (rpc->fd == -1) {
	436	rpc_set_error(rpc, "Failed to create UDP socket: %s", strerror(errno));
	437	freeaddrinfo(ai);
	438	return -1;
	439	}
	440
	441	if (bind(rpc->fd, (struct sockaddr *)ai->ai_addr, sizeof(struct sockaddr_in)) != 0) {
	442	rpc_set_error(rpc, "Failed to bind to UDP socket: %s",strerror(errno));
	443	freeaddrinfo(ai);
	444	return -1;
	445	}
	446	break;
	447	default:
	448	rpc_set_error(rpc, "Can not handle UPD sockets of family %d yet", ai->ai_family);
	449	freeaddrinfo(ai);
	450	return -1;
	451	}
	452
	453	freeaddrinfo(ai);
	454
	455	return 0;
	456	}
	457
5bf60dc6 RS	458	int rpc_set_udp_destination(struct rpc_context rpc, char addr, int port, int is_broadcast)
	459	{
	460	struct addrinfo *ai = NULL;
	461	char service[6];
	462
	463	if (rpc->is_udp == 0) {
	464	rpc_set_error(rpc, "Can not set destination sockaddr. Not UDP context");
	465	return -1;
	466	}
	467
6874f61e	468	sprintf(service, "%d", port);
5bf60dc6 RS	469	if (getaddrinfo(addr, service, NULL, &ai) != 0) {
	470	rpc_set_error(rpc, "Invalid address:%s. "
	471	"Can not resolv into IPv4/v6 structure.");
	472	return -1;
	473	}
	474
	475	if (rpc->udp_dest) {
	476	free(rpc->udp_dest);
	477	rpc->udp_dest = NULL;
	478	}
	479	rpc->udp_dest = malloc(ai->ai_addrlen);
	480	if (rpc->udp_dest == NULL) {
	481	rpc_set_error(rpc, "Out of memory. Failed to allocate sockaddr structure");
	482	return -1;
	483	}
	484	memcpy(rpc->udp_dest, ai->ai_addr, ai->ai_addrlen);
	485	freeaddrinfo(ai);
	486
	487	rpc->is_broadcast = is_broadcast;
	488	setsockopt(rpc->fd, SOL_SOCKET, SO_BROADCAST, &is_broadcast, sizeof(is_broadcast));
	489
	490	return 0;
	491	}
c481da67 RS	492
	493	struct sockaddr rpc_get_recv_sockaddr(struct rpc_context rpc)
	494	{
	495	return (struct sockaddr *)&rpc->udp_src;
	496	}