[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 WIN32
#include "win32_compat.h"
#else
#include <unistd.h>
#include <poll.h>
#include <arpa/inet.h>
#include <sys/ioctl.h>
#include <sys/socket.h>
#include <netdb.h>
#endif/*WIN32*/

#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
#ifdef HAVE_SYS_SOCKIO_H
#include <sys/sockio.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 //FIXME
}

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) {
		char err = 0;
		socklen_t err_size = sizeof(err);

		if (getsockopt(rpc->fd, SOL_SOCKET, SO_ERROR,
				(char *)&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,
				(char *)&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, (char *)&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	*/
a8a1b858 M	17	#ifdef WIN32
	18	#include "win32_compat.h"
	19	#else
	20	#include <unistd.h>
	21	#include <poll.h>
	22	#include <arpa/inet.h>
	23	#include <sys/ioctl.h>
	24	#include <sys/socket.h>
	25	#include <netdb.h>
	26	#endif/WIN32/
84004dbf	27
6874f61e RS	28	#if defined(WIN32)
	29	#include <winsock2.h>
	30	#include <ws2tcpip.h>
	31	#include <basetsd.h>
	32	#define ssize_t SSIZE_T
	33	#define MSG_DONTWAIT 0
	34	#else
	35	#include <unistd.h>
	36	#include <poll.h>
	37	#include <arpa/inet.h>
	38	#include <sys/ioctl.h>
	39	#include <sys/socket.h>
	40	#include <netdb.h>
	41	#endif
	42
fc01d2a9 TN	43	#ifdef HAVE_CONFIG_H
	44	#include "config.h"
	45	#endif
84004dbf	46	#include <stdio.h>
98f5fee8	47	#include <stdlib.h>
84004dbf	48	#include <fcntl.h>
84004dbf RS	49	#include <string.h>
84004dbf RS	50	#include <errno.h>
98f5fee8	51	#include <rpc/rpc.h>
84004dbf	52	#include <rpc/xdr.h>
fc01d2a9 TN	53	#ifdef HAVE_SYS_FILIO_H
	54	#include <sys/filio.h>
	55	#endif
647d2ea1 RS	56	#ifdef HAVE_SYS_SOCKIO_H
	57	#include <sys/sockio.h>
	58	#endif
485bc9b9	59	#include <sys/types.h>
84004dbf RS	60	#include "libnfs.h"
	61	#include "libnfs-raw.h"
	62	#include "libnfs-private.h"
	63	#include "slist.h"
	64
b077fdeb RS	65	static int rpc_disconnect_requeue(struct rpc_context *rpc);
b077fdeb RS	66
84004dbf RS	67	static void set_nonblocking(int fd)
84004dbf RS	68	{
6874f61e RS	69	#if defined(WIN32)
6874f61e RS	70	#else
84004dbf RS	71	unsigned v;
	72	v = fcntl(fd, F_GETFL, 0);
	73	fcntl(fd, F_SETFL, v \| O_NONBLOCK);
a8a1b858	74	#endif //FIXME
84004dbf RS	75	}
	76
	77	int rpc_get_fd(struct rpc_context *rpc)
	78	{
	79	return rpc->fd;
	80	}
	81
	82	int rpc_which_events(struct rpc_context *rpc)
	83	{
912f7ad5	84	int events = rpc->is_connected ? POLLIN : POLLOUT;
84004dbf	85
5911f3e8 RS	86	if (rpc->is_udp != 0) {
	87	/* for udp sockets we only wait for pollin */
	88	return POLLIN;
	89	}
	90
84004dbf RS	91	if (rpc->outqueue) {
	92	events \|= POLLOUT;
	93	}
	94	return events;
	95	}
	96
	97	static int rpc_write_to_socket(struct rpc_context *rpc)
	98	{
	99	ssize_t count;
	100
	101	if (rpc == NULL) {
84004dbf RS	102	return -1;
	103	}
	104	if (rpc->fd == -1) {
1896d37b RS	105	rpc_set_error(rpc, "trying to write but not connected");
1896d37b RS	106	return -1;
84004dbf RS	107	}
	108
	109	while (rpc->outqueue != NULL) {
	110	ssize_t total;
	111
	112	total = rpc->outqueue->outdata.size;
	113
6874f61e RS	114	#if defined(WIN32)
	115	count = send(rpc->fd, rpc->outqueue->outdata.data + rpc->outqueue->written, total - rpc->outqueue->written, 0);
	116	#else
84004dbf	117	count = write(rpc->fd, rpc->outqueue->outdata.data + rpc->outqueue->written, total - rpc->outqueue->written);
6874f61e	118	#endif
84004dbf RS	119	if (count == -1) {
84004dbf RS	120	if (errno == EAGAIN \|\| errno == EWOULDBLOCK) {
84004dbf RS	121	return 0;
84004dbf RS	122	}
1896d37b RS	123	rpc_set_error(rpc, "Error when writing to socket :%s(%d)", strerror(errno), errno);
1896d37b RS	124	return -1;
84004dbf RS	125	}
	126
	127	rpc->outqueue->written += count;
	128	if (rpc->outqueue->written == total) {
	129	struct rpc_pdu *pdu = rpc->outqueue;
	130
	131	SLIST_REMOVE(&rpc->outqueue, pdu);
	132	SLIST_ADD_END(&rpc->waitpdu, pdu);
	133	}
	134	}
	135	return 0;
	136	}
	137
	138	static int rpc_read_from_socket(struct rpc_context *rpc)
	139	{
	140	int available;
	141	int size;
cdb19ec1	142	int pdu_size;
84004dbf RS	143	ssize_t count;
84004dbf RS	144
6874f61e RS	145	#if defined(WIN32)
	146	if (ioctlsocket(rpc->fd, FIONREAD, &available) != 0) {
	147	#else
84004dbf	148	if (ioctl(rpc->fd, FIONREAD, &available) != 0) {
6874f61e	149	#endif
84004dbf RS	150	rpc_set_error(rpc, "Ioctl FIONREAD returned error : %d. Closing socket.", errno);
	151	return -1;
	152	}
a8a1b858	153
84004dbf RS	154	if (available == 0) {
84004dbf RS	155	rpc_set_error(rpc, "Socket has been closed");
1896d37b	156	return -1;
84004dbf	157	}
cdb19ec1	158
0268794f RS	159	if (rpc->is_udp) {
	160	char *buf;
	161	socklen_t socklen = sizeof(rpc->udp_src);
	162
	163	buf = malloc(available);
	164	if (buf == NULL) {
	165	rpc_set_error(rpc, "Failed to malloc buffer for recvfrom");
	166	return -1;
	167	}
	168	count = recvfrom(rpc->fd, buf, available, MSG_DONTWAIT, (struct sockaddr *)&rpc->udp_src, &socklen);
	169	if (count < 0) {
	170	rpc_set_error(rpc, "Failed recvfrom: %s", strerror(errno));
	171	free(buf);
	172	}
	173	if (rpc_process_pdu(rpc, buf, count) != 0) {
	174	rpc_set_error(rpc, "Invalid/garbage pdu received from server. Ignoring PDU");
	175	free(buf);
	176	return -1;
	177	}
	178	free(buf);
	179	return 0;
	180	}
	181
cdb19ec1 RS	182	/* read record marker, 4 bytes at the beginning of every pdu */
	183	if (rpc->inbuf == NULL) {
	184	rpc->insize = 4;
	185	rpc->inbuf = malloc(rpc->insize);
	186	if (rpc->inbuf == NULL) {
	187	rpc_set_error(rpc, "Failed to allocate buffer for record marker, errno:%d. Closing socket.", errno);
	188	return -1;
	189	}
	190	}
	191	if (rpc->inpos < 4) {
	192	size = 4 - rpc->inpos;
	193
6874f61e RS	194	#if defined(WIN32)
	195	count = recv(rpc->fd, rpc->inbuf + rpc->inpos, size, 0);
	196	#else
cdb19ec1	197	count = read(rpc->fd, rpc->inbuf + rpc->inpos, size);
6874f61e	198	#endif
cdb19ec1 RS	199	if (count == -1) {
	200	if (errno == EINTR) {
	201	return 0;
	202	}
	203	rpc_set_error(rpc, "Read from socket failed, errno:%d. Closing socket.", errno);
	204	return -1;
	205	}
	206	available -= count;
	207	rpc->inpos += count;
	208	}
	209
	210	if (available == 0) {
	211	return 0;
	212	}
	213
	214	pdu_size = rpc_get_pdu_size(rpc->inbuf);
	215	if (rpc->insize < pdu_size) {
	216	unsigned char *buf;
	217
	218	buf = malloc(pdu_size);
	219	if (buf == NULL) {
	220	rpc_set_error(rpc, "Failed to allocate buffer of %d bytes for pdu, errno:%d. Closing socket.", pdu_size, errno);
	221	return -1;
	222	}
	223	memcpy(buf, rpc->inbuf, rpc->insize);
	224	free(rpc->inbuf);
	225	rpc->inbuf = buf;
	226	rpc->insize = rpc_get_pdu_size(rpc->inbuf);
84004dbf	227	}
cdb19ec1 RS	228
	229	size = available;
	230	if (size > rpc->insize - rpc->inpos) {
	231	size = rpc->insize - rpc->inpos;
84004dbf RS	232	}
84004dbf RS	233
6874f61e RS	234	#if defined(WIN32)
	235	count = recv(rpc->fd, rpc->inbuf + rpc->inpos, size, 0);
	236	#else
cdb19ec1	237	count = read(rpc->fd, rpc->inbuf + rpc->inpos, size);
6874f61e	238	#endif
84004dbf RS	239	if (count == -1) {
84004dbf RS	240	if (errno == EINTR) {
84004dbf RS	241	return 0;
	242	}
	243	rpc_set_error(rpc, "Read from socket failed, errno:%d. Closing socket.", errno);
1896d37b	244	return -1;
84004dbf	245	}
cdb19ec1 RS	246	available -= count;
cdb19ec1 RS	247	rpc->inpos += count;
84004dbf	248
cdb19ec1 RS	249	if (rpc->inpos == rpc->insize) {
cdb19ec1 RS	250	if (rpc_process_pdu(rpc, rpc->inbuf, pdu_size) != 0) {
84004dbf	251	rpc_set_error(rpc, "Invalid/garbage pdu received from server. Closing socket");
1896d37b	252	return -1;
84004dbf	253	}
cdb19ec1 RS	254	free(rpc->inbuf);
	255	rpc->inbuf = NULL;
	256	rpc->insize = 0;
	257	rpc->inpos = 0;
84004dbf	258	}
cdb19ec1	259
84004dbf RS	260	return 0;
	261	}
	262
	263
	264
	265	int rpc_service(struct rpc_context *rpc, int revents)
	266	{
	267	if (revents & POLLERR) {
a8a1b858	268	char err = 0;
912f7ad5 RS	269	socklen_t err_size = sizeof(err);
	270
	271	if (getsockopt(rpc->fd, SOL_SOCKET, SO_ERROR,
bb4e9ed6	272	(char *)&err, &err_size) != 0 \|\| err != 0) {
912f7ad5 RS	273	if (err == 0) {
	274	err = errno;
	275	}
	276	rpc_set_error(rpc, "rpc_service: socket error "
	277	"%s(%d).",
	278	strerror(err), err);
84004dbf	279	} else {
912f7ad5 RS	280	rpc_set_error(rpc, "rpc_service: POLLERR, "
912f7ad5 RS	281	"Unknown socket error.");
84004dbf RS	282	}
	283	rpc->connect_cb(rpc, RPC_STATUS_ERROR, rpc->error_string, rpc->connect_data);
	284	return -1;
	285	}
	286	if (revents & POLLHUP) {
84004dbf RS	287	rpc_set_error(rpc, "Socket failed with POLLHUP");
84004dbf RS	288	rpc->connect_cb(rpc, RPC_STATUS_ERROR, rpc->error_string, rpc->connect_data);
1896d37b	289	return -1;
84004dbf RS	290	}
	291
	292	if (rpc->is_connected == 0 && rpc->fd != -1 && revents&POLLOUT) {
912f7ad5 RS	293	int err = 0;
	294	socklen_t err_size = sizeof(err);
	295
	296	if (getsockopt(rpc->fd, SOL_SOCKET, SO_ERROR,
bb4e9ed6	297	(char *)&err, &err_size) != 0 \|\| err != 0) {
912f7ad5 RS	298	if (err == 0) {
	299	err = errno;
	300	}
	301	rpc_set_error(rpc, "rpc_service: socket error "
	302	"%s(%d) while connecting.",
	303	strerror(err), err);
	304	rpc->connect_cb(rpc, RPC_STATUS_ERROR,
	305	NULL, rpc->connect_data);
	306	return -1;
	307	}
	308
84004dbf RS	309	rpc->is_connected = 1;
	310	rpc->connect_cb(rpc, RPC_STATUS_SUCCESS, NULL, rpc->connect_data);
	311	return 0;
	312	}
	313
b077fdeb RS	314	if (revents & POLLIN) {
	315	if (rpc_read_from_socket(rpc) != 0) {
	316	rpc_disconnect_requeue(rpc);
	317	return 0;
84004dbf RS	318	}
	319	}
	320
b077fdeb RS	321	if (revents & POLLOUT && rpc->outqueue != NULL) {
	322	if (rpc_write_to_socket(rpc) != 0) {
	323	rpc_set_error(rpc, "write to socket failed");
1896d37b	324	return -1;
84004dbf RS	325	}
	326	}
	327
	328	return 0;
	329	}
	330
	331
	332	int rpc_connect_async(struct rpc_context rpc, const char server, int port, rpc_cb cb, void *private_data)
	333	{
	334	struct sockaddr_storage s;
	335	struct sockaddr_in sin = (struct sockaddr_in )&s;
	336	int socksize;
	337
	338	if (rpc->fd != -1) {
	339	rpc_set_error(rpc, "Trying to connect while already connected");
84004dbf RS	340	return -1;
	341	}
	342
070287e5 RS	343	if (rpc->is_udp != 0) {
	344	rpc_set_error(rpc, "Trying to connect on UDP socket");
	345	return -1;
	346	}
	347
84004dbf RS	348	sin->sin_family = AF_INET;
	349	sin->sin_port = htons(port);
	350	if (inet_pton(AF_INET, server, &sin->sin_addr) != 1) {
	351	rpc_set_error(rpc, "Not a valid server ip address");
1896d37b	352	return -1;
84004dbf RS	353	}
	354
	355	switch (s.ss_family) {
	356	case AF_INET:
84004dbf	357	socksize = sizeof(struct sockaddr_in);
f7f931c7	358	#ifdef HAVE_SOCKADDR_LEN
ea214e45 RS	359	sin->sin_len = socksize;
ea214e45 RS	360	#endif
6874f61e	361	rpc->fd = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);
84004dbf RS	362	break;
	363	}
	364
	365	if (rpc->fd == -1) {
	366	rpc_set_error(rpc, "Failed to open socket");
1896d37b	367	return -1;
84004dbf RS	368	}
	369
	370	rpc->connect_cb = cb;
	371	rpc->connect_data = private_data;
	372
	373	set_nonblocking(rpc->fd);
	374
	375	if (connect(rpc->fd, (struct sockaddr *)&s, socksize) != 0 && errno != EINPROGRESS) {
	376	rpc_set_error(rpc, "connect() to server failed");
1896d37b	377	return -1;
84004dbf RS	378	}
	379
	380	return 0;
	381	}
	382
	383	int rpc_disconnect(struct rpc_context rpc, char error)
	384	{
	385	if (rpc->fd != -1) {
6874f61e RS	386	#if defined(WIN32)
	387	closesocket(rpc->fd);
	388	#else
84004dbf	389	close(rpc->fd);
6874f61e	390	#endif
84004dbf RS	391	}
	392	rpc->fd = -1;
	393
	394	rpc->is_connected = 0;
	395
	396	rpc_error_all_pdus(rpc, error);
	397
	398	return 0;
	399	}
485bc9b9	400
b077fdeb RS	401	/* disconnect but do not error all PDUs, just move pdus in-flight back to the outqueue */
	402	static int rpc_disconnect_requeue(struct rpc_context *rpc)
	403	{
	404	struct rpc_pdu *pdu;
	405
	406	if (rpc->fd != -1) {
6874f61e RS	407	#if defined(WIN32)
	408	closesocket(rpc->fd);
	409	#else
b077fdeb	410	close(rpc->fd);
6874f61e	411	#endif
b077fdeb RS	412	}
	413	rpc->fd = -1;
	414
	415	rpc->is_connected = 0;
	416
	417	/* socket is closed so we will not get any replies to any commands
	418	* in flight. Move them all over from the waitpdu queue back to the out queue
	419	*/
	420	for (pdu=rpc->waitpdu; pdu; pdu=pdu->next) {
	421	SLIST_REMOVE(&rpc->waitpdu, pdu);
	422	SLIST_ADD(&rpc->outqueue, pdu);
	423	}
	424
	425	return 0;
	426	}
	427
485bc9b9 RS	428
	429	int rpc_bind_udp(struct rpc_context rpc, char addr, int port)
	430	{
	431	struct addrinfo *ai = NULL;
	432	char service[6];
	433
	434	if (rpc->is_udp == 0) {
	435	rpc_set_error(rpc, "Cant not bind UDP. Not UDP context");
	436	return -1;
	437	}
	438
6874f61e	439	sprintf(service, "%d", port);
485bc9b9 RS	440	if (getaddrinfo(addr, service, NULL, &ai) != 0) {
	441	rpc_set_error(rpc, "Invalid address:%s. "
	442	"Can not resolv into IPv4/v6 structure.");
	443	return -1;
	444	}
	445
	446	switch(ai->ai_family) {
	447	case AF_INET:
	448	rpc->fd = socket(ai->ai_family, SOCK_DGRAM, 0);
	449	if (rpc->fd == -1) {
	450	rpc_set_error(rpc, "Failed to create UDP socket: %s", strerror(errno));
	451	freeaddrinfo(ai);
	452	return -1;
	453	}
	454
	455	if (bind(rpc->fd, (struct sockaddr *)ai->ai_addr, sizeof(struct sockaddr_in)) != 0) {
	456	rpc_set_error(rpc, "Failed to bind to UDP socket: %s",strerror(errno));
	457	freeaddrinfo(ai);
	458	return -1;
	459	}
	460	break;
	461	default:
	462	rpc_set_error(rpc, "Can not handle UPD sockets of family %d yet", ai->ai_family);
	463	freeaddrinfo(ai);
	464	return -1;
	465	}
	466
	467	freeaddrinfo(ai);
	468
	469	return 0;
	470	}
	471
5bf60dc6 RS	472	int rpc_set_udp_destination(struct rpc_context rpc, char addr, int port, int is_broadcast)
	473	{
	474	struct addrinfo *ai = NULL;
	475	char service[6];
	476
	477	if (rpc->is_udp == 0) {
	478	rpc_set_error(rpc, "Can not set destination sockaddr. Not UDP context");
	479	return -1;
	480	}
	481
6874f61e	482	sprintf(service, "%d", port);
5bf60dc6 RS	483	if (getaddrinfo(addr, service, NULL, &ai) != 0) {
	484	rpc_set_error(rpc, "Invalid address:%s. "
	485	"Can not resolv into IPv4/v6 structure.");
	486	return -1;
	487	}
	488
	489	if (rpc->udp_dest) {
	490	free(rpc->udp_dest);
	491	rpc->udp_dest = NULL;
	492	}
	493	rpc->udp_dest = malloc(ai->ai_addrlen);
	494	if (rpc->udp_dest == NULL) {
	495	rpc_set_error(rpc, "Out of memory. Failed to allocate sockaddr structure");
	496	return -1;
	497	}
	498	memcpy(rpc->udp_dest, ai->ai_addr, ai->ai_addrlen);
	499	freeaddrinfo(ai);
	500
	501	rpc->is_broadcast = is_broadcast;
bb4e9ed6	502	setsockopt(rpc->fd, SOL_SOCKET, SO_BROADCAST, (char *)&is_broadcast, sizeof(is_broadcast));
5bf60dc6 RS	503
	504	return 0;
	505	}
c481da67 RS	506
	507	struct sockaddr rpc_get_recv_sockaddr(struct rpc_context rpc)
	508	{
	509	return (struct sockaddr *)&rpc->udp_src;
	510	}