e4de894c854e3e752271b1a3cb6833b400ec1a2c
2 Copyright (C) 2010 by Ronnie Sahlberg <ronniesahlberg@gmail.com>
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.
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.
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/>.
30 #include <arpa/inet.h>
31 #ifdef HAVE_SYS_FILIO_H
32 #include <sys/filio.h>
34 #include <sys/ioctl.h>
35 #include <sys/types.h>
36 #include <sys/socket.h>
39 #include "libnfs-raw.h"
40 #include "libnfs-private.h"
43 static void set_nonblocking(int fd
)
46 v
= fcntl(fd
, F_GETFL
, 0);
47 fcntl(fd
, F_SETFL
, v
| O_NONBLOCK
);
50 int rpc_get_fd(struct rpc_context
*rpc
)
55 int rpc_which_events(struct rpc_context
*rpc
)
57 int events
= rpc
->is_connected
? POLLIN
: POLLOUT
;
59 if (rpc
->is_udp
!= 0) {
60 /* for udp sockets we only wait for pollin */
70 static int rpc_write_to_socket(struct rpc_context
*rpc
)
78 rpc_set_error(rpc
, "trying to write but not connected");
82 while (rpc
->outqueue
!= NULL
) {
85 total
= rpc
->outqueue
->outdata
.size
;
87 count
= write(rpc
->fd
, rpc
->outqueue
->outdata
.data
+ rpc
->outqueue
->written
, total
- rpc
->outqueue
->written
);
89 if (errno
== EAGAIN
|| errno
== EWOULDBLOCK
) {
92 rpc_set_error(rpc
, "Error when writing to socket :%s(%d)", strerror(errno
), errno
);
96 rpc
->outqueue
->written
+= count
;
97 if (rpc
->outqueue
->written
== total
) {
98 struct rpc_pdu
*pdu
= rpc
->outqueue
;
100 SLIST_REMOVE(&rpc
->outqueue
, pdu
);
101 SLIST_ADD_END(&rpc
->waitpdu
, pdu
);
107 static int rpc_read_from_socket(struct rpc_context
*rpc
)
114 if (ioctl(rpc
->fd
, FIONREAD
, &available
) != 0) {
115 rpc_set_error(rpc
, "Ioctl FIONREAD returned error : %d. Closing socket.", errno
);
118 if (available
== 0) {
119 rpc_set_error(rpc
, "Socket has been closed");
125 socklen_t socklen
= sizeof(rpc
->udp_src
);
127 buf
= malloc(available
);
129 rpc_set_error(rpc
, "Failed to malloc buffer for recvfrom");
132 count
= recvfrom(rpc
->fd
, buf
, available
, MSG_DONTWAIT
, (struct sockaddr
*)&rpc
->udp_src
, &socklen
);
134 rpc_set_error(rpc
, "Failed recvfrom: %s", strerror(errno
));
137 if (rpc_process_pdu(rpc
, buf
, count
) != 0) {
138 rpc_set_error(rpc
, "Invalid/garbage pdu received from server. Ignoring PDU");
146 /* read record marker, 4 bytes at the beginning of every pdu */
147 if (rpc
->inbuf
== NULL
) {
149 rpc
->inbuf
= malloc(rpc
->insize
);
150 if (rpc
->inbuf
== NULL
) {
151 rpc_set_error(rpc
, "Failed to allocate buffer for record marker, errno:%d. Closing socket.", errno
);
155 if (rpc
->inpos
< 4) {
156 size
= 4 - rpc
->inpos
;
158 count
= read(rpc
->fd
, rpc
->inbuf
+ rpc
->inpos
, size
);
160 if (errno
== EINTR
) {
163 rpc_set_error(rpc
, "Read from socket failed, errno:%d. Closing socket.", errno
);
170 if (available
== 0) {
174 pdu_size
= rpc_get_pdu_size(rpc
->inbuf
);
175 if (rpc
->insize
< pdu_size
) {
178 buf
= malloc(pdu_size
);
180 rpc_set_error(rpc
, "Failed to allocate buffer of %d bytes for pdu, errno:%d. Closing socket.", pdu_size
, errno
);
183 memcpy(buf
, rpc
->inbuf
, rpc
->insize
);
186 rpc
->insize
= rpc_get_pdu_size(rpc
->inbuf
);
190 if (size
> rpc
->insize
- rpc
->inpos
) {
191 size
= rpc
->insize
- rpc
->inpos
;
194 count
= read(rpc
->fd
, rpc
->inbuf
+ rpc
->inpos
, size
);
196 if (errno
== EINTR
) {
199 rpc_set_error(rpc
, "Read from socket failed, errno:%d. Closing socket.", errno
);
205 if (rpc
->inpos
== rpc
->insize
) {
206 if (rpc_process_pdu(rpc
, rpc
->inbuf
, pdu_size
) != 0) {
207 rpc_set_error(rpc
, "Invalid/garbage pdu received from server. Closing socket");
221 int rpc_service(struct rpc_context
*rpc
, int revents
)
223 if (revents
& POLLERR
) {
225 socklen_t err_size
= sizeof(err
);
227 if (getsockopt(rpc
->fd
, SOL_SOCKET
, SO_ERROR
,
228 &err
, &err_size
) != 0 || err
!= 0) {
232 rpc_set_error(rpc
, "rpc_service: socket error "
236 rpc_set_error(rpc
, "rpc_service: POLLERR, "
237 "Unknown socket error.");
239 rpc
->connect_cb(rpc
, RPC_STATUS_ERROR
, rpc
->error_string
, rpc
->connect_data
);
242 if (revents
& POLLHUP
) {
243 rpc_set_error(rpc
, "Socket failed with POLLHUP");
244 rpc
->connect_cb(rpc
, RPC_STATUS_ERROR
, rpc
->error_string
, rpc
->connect_data
);
248 if (rpc
->is_connected
== 0 && rpc
->fd
!= -1 && revents
&POLLOUT
) {
250 socklen_t err_size
= sizeof(err
);
252 if (getsockopt(rpc
->fd
, SOL_SOCKET
, SO_ERROR
,
253 &err
, &err_size
) != 0 || err
!= 0) {
257 rpc_set_error(rpc
, "rpc_service: socket error "
258 "%s(%d) while connecting.",
260 rpc
->connect_cb(rpc
, RPC_STATUS_ERROR
,
261 NULL
, rpc
->connect_data
);
265 rpc
->is_connected
= 1;
266 rpc
->connect_cb(rpc
, RPC_STATUS_SUCCESS
, NULL
, rpc
->connect_data
);
270 if (revents
& POLLOUT
&& rpc
->outqueue
!= NULL
) {
271 if (rpc_write_to_socket(rpc
) != 0) {
272 rpc_set_error(rpc
, "write to socket failed");
277 if (revents
& POLLIN
) {
278 if (rpc_read_from_socket(rpc
) != 0) {
279 rpc_disconnect(rpc
, rpc_get_error(rpc
));
288 int rpc_connect_async(struct rpc_context
*rpc
, const char *server
, int port
, rpc_cb cb
, void *private_data
)
290 struct sockaddr_storage s
;
291 struct sockaddr_in
*sin
= (struct sockaddr_in
*)&s
;
295 rpc_set_error(rpc
, "Trying to connect while already connected");
299 if (rpc
->is_udp
!= 0) {
300 rpc_set_error(rpc
, "Trying to connect on UDP socket");
304 sin
->sin_family
= AF_INET
;
305 sin
->sin_port
= htons(port
);
306 if (inet_pton(AF_INET
, server
, &sin
->sin_addr
) != 1) {
307 rpc_set_error(rpc
, "Not a valid server ip address");
311 switch (s
.ss_family
) {
313 socksize
= sizeof(struct sockaddr_in
);
314 #ifdef HAVE_SOCKADDR_LEN
315 sin
->sin_len
= socksize
;
317 rpc
->fd
= socket(AF_INET
, SOCK_STREAM
, 0);
322 rpc_set_error(rpc
, "Failed to open socket");
326 rpc
->connect_cb
= cb
;
327 rpc
->connect_data
= private_data
;
329 set_nonblocking(rpc
->fd
);
331 if (connect(rpc
->fd
, (struct sockaddr
*)&s
, socksize
) != 0 && errno
!= EINPROGRESS
) {
332 rpc_set_error(rpc
, "connect() to server failed");
339 int rpc_disconnect(struct rpc_context
*rpc
, char *error
)
346 rpc
->is_connected
= 0;
348 rpc_error_all_pdus(rpc
, error
);
354 int rpc_bind_udp(struct rpc_context
*rpc
, char *addr
, int port
)
356 struct addrinfo
*ai
= NULL
;
359 if (rpc
->is_udp
== 0) {
360 rpc_set_error(rpc
, "Cant not bind UDP. Not UDP context");
364 snprintf(service
, 6, "%d", port
);
365 if (getaddrinfo(addr
, service
, NULL
, &ai
) != 0) {
366 rpc_set_error(rpc
, "Invalid address:%s. "
367 "Can not resolv into IPv4/v6 structure.");
371 switch(ai
->ai_family
) {
373 rpc
->fd
= socket(ai
->ai_family
, SOCK_DGRAM
, 0);
375 rpc_set_error(rpc
, "Failed to create UDP socket: %s", strerror(errno
));
380 if (bind(rpc
->fd
, (struct sockaddr
*)ai
->ai_addr
, sizeof(struct sockaddr_in
)) != 0) {
381 rpc_set_error(rpc
, "Failed to bind to UDP socket: %s",strerror(errno
));
387 rpc_set_error(rpc
, "Can not handle UPD sockets of family %d yet", ai
->ai_family
);
397 int rpc_set_udp_destination(struct rpc_context
*rpc
, char *addr
, int port
, int is_broadcast
)
399 struct addrinfo
*ai
= NULL
;
402 if (rpc
->is_udp
== 0) {
403 rpc_set_error(rpc
, "Can not set destination sockaddr. Not UDP context");
407 snprintf(service
, 6, "%d", port
);
408 if (getaddrinfo(addr
, service
, NULL
, &ai
) != 0) {
409 rpc_set_error(rpc
, "Invalid address:%s. "
410 "Can not resolv into IPv4/v6 structure.");
416 rpc
->udp_dest
= NULL
;
418 rpc
->udp_dest
= malloc(ai
->ai_addrlen
);
419 if (rpc
->udp_dest
== NULL
) {
420 rpc_set_error(rpc
, "Out of memory. Failed to allocate sockaddr structure");
423 memcpy(rpc
->udp_dest
, ai
->ai_addr
, ai
->ai_addrlen
);
426 rpc
->is_broadcast
= is_broadcast
;
427 setsockopt(rpc
->fd
, SOL_SOCKET
, SO_BROADCAST
, &is_broadcast
, sizeof(is_broadcast
));
432 struct sockaddr
*rpc_get_recv_sockaddr(struct rpc_context
*rpc
)
434 return (struct sockaddr
*)&rpc
->udp_src
;