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/>.
18 #include "win32_compat.h"
22 #include <arpa/inet.h>
23 #include <sys/ioctl.h>
24 #include <sys/socket.h>
32 #define ssize_t SSIZE_T
33 #define MSG_DONTWAIT 0
37 #include <arpa/inet.h>
38 #include <sys/ioctl.h>
39 #include <sys/socket.h>
53 #ifdef HAVE_SYS_FILIO_H
54 #include <sys/filio.h>
56 #ifdef HAVE_SYS_SOCKIO_H
57 #include <sys/sockio.h>
59 #include <sys/types.h>
61 #include "libnfs-raw.h"
62 #include "libnfs-private.h"
65 static int rpc_disconnect_requeue(struct rpc_context
*rpc
);
67 static void set_nonblocking(int fd
)
72 v
= ioctlsocket(fd
, FIONBIO
,&nonblocking
);
74 v
= fcntl(fd
, F_GETFL
, 0);
75 fcntl(fd
, F_SETFL
, v
| O_NONBLOCK
);
79 int rpc_get_fd(struct rpc_context
*rpc
)
84 int rpc_which_events(struct rpc_context
*rpc
)
86 int events
= rpc
->is_connected
? POLLIN
: POLLOUT
;
88 if (rpc
->is_udp
!= 0) {
89 /* for udp sockets we only wait for pollin */
99 static int rpc_write_to_socket(struct rpc_context
*rpc
)
107 rpc_set_error(rpc
, "trying to write but not connected");
111 while (rpc
->outqueue
!= NULL
) {
114 total
= rpc
->outqueue
->outdata
.size
;
117 count
= send(rpc
->fd
, rpc
->outqueue
->outdata
.data
+ rpc
->outqueue
->written
, total
- rpc
->outqueue
->written
, 0);
119 count
= write(rpc
->fd
, rpc
->outqueue
->outdata
.data
+ rpc
->outqueue
->written
, total
- rpc
->outqueue
->written
);
122 if (errno
== EAGAIN
|| errno
== EWOULDBLOCK
) {
125 rpc_set_error(rpc
, "Error when writing to socket :%s(%d)", strerror(errno
), errno
);
129 rpc
->outqueue
->written
+= count
;
130 if (rpc
->outqueue
->written
== total
) {
131 struct rpc_pdu
*pdu
= rpc
->outqueue
;
133 SLIST_REMOVE(&rpc
->outqueue
, pdu
);
134 SLIST_ADD_END(&rpc
->waitpdu
, pdu
);
140 static int rpc_read_from_socket(struct rpc_context
*rpc
)
148 if (ioctlsocket(rpc
->fd
, FIONREAD
, &available
) != 0) {
150 if (ioctl(rpc
->fd
, FIONREAD
, &available
) != 0) {
152 rpc_set_error(rpc
, "Ioctl FIONREAD returned error : %d. Closing socket.", errno
);
156 if (available
== 0) {
157 rpc_set_error(rpc
, "Socket has been closed");
163 socklen_t socklen
= sizeof(rpc
->udp_src
);
165 buf
= malloc(available
);
167 rpc_set_error(rpc
, "Failed to malloc buffer for recvfrom");
170 count
= recvfrom(rpc
->fd
, buf
, available
, MSG_DONTWAIT
, (struct sockaddr
*)&rpc
->udp_src
, &socklen
);
172 rpc_set_error(rpc
, "Failed recvfrom: %s", strerror(errno
));
175 if (rpc_process_pdu(rpc
, buf
, count
) != 0) {
176 rpc_set_error(rpc
, "Invalid/garbage pdu received from server. Ignoring PDU");
184 /* read record marker, 4 bytes at the beginning of every pdu */
185 if (rpc
->inbuf
== NULL
) {
187 rpc
->inbuf
= malloc(rpc
->insize
);
188 if (rpc
->inbuf
== NULL
) {
189 rpc_set_error(rpc
, "Failed to allocate buffer for record marker, errno:%d. Closing socket.", errno
);
193 if (rpc
->inpos
< 4) {
194 size
= 4 - rpc
->inpos
;
197 count
= recv(rpc
->fd
, rpc
->inbuf
+ rpc
->inpos
, size
, 0);
199 count
= read(rpc
->fd
, rpc
->inbuf
+ rpc
->inpos
, size
);
202 if (errno
== EINTR
) {
205 rpc_set_error(rpc
, "Read from socket failed, errno:%d. Closing socket.", errno
);
212 if (available
== 0) {
216 pdu_size
= rpc_get_pdu_size(rpc
->inbuf
);
217 if (rpc
->insize
< pdu_size
) {
220 buf
= malloc(pdu_size
);
222 rpc_set_error(rpc
, "Failed to allocate buffer of %d bytes for pdu, errno:%d. Closing socket.", pdu_size
, errno
);
225 memcpy(buf
, rpc
->inbuf
, rpc
->insize
);
228 rpc
->insize
= rpc_get_pdu_size(rpc
->inbuf
);
232 if (size
> rpc
->insize
- rpc
->inpos
) {
233 size
= rpc
->insize
- rpc
->inpos
;
237 count
= recv(rpc
->fd
, rpc
->inbuf
+ rpc
->inpos
, size
, 0);
239 count
= read(rpc
->fd
, rpc
->inbuf
+ rpc
->inpos
, size
);
242 if (errno
== EINTR
) {
245 rpc_set_error(rpc
, "Read from socket failed, errno:%d. Closing socket.", errno
);
251 if (rpc
->inpos
== rpc
->insize
) {
252 if (rpc_process_pdu(rpc
, rpc
->inbuf
, pdu_size
) != 0) {
253 rpc_set_error(rpc
, "Invalid/garbage pdu received from server. Closing socket");
267 int rpc_service(struct rpc_context
*rpc
, int revents
)
269 if (revents
& POLLERR
) {
271 socklen_t err_size
= sizeof(err
);
273 if (getsockopt(rpc
->fd
, SOL_SOCKET
, SO_ERROR
,
274 (char *)&err
, &err_size
) != 0 || err
!= 0) {
278 rpc_set_error(rpc
, "rpc_service: socket error "
282 rpc_set_error(rpc
, "rpc_service: POLLERR, "
283 "Unknown socket error.");
285 rpc
->connect_cb(rpc
, RPC_STATUS_ERROR
, rpc
->error_string
, rpc
->connect_data
);
288 if (revents
& POLLHUP
) {
289 rpc_set_error(rpc
, "Socket failed with POLLHUP");
290 rpc
->connect_cb(rpc
, RPC_STATUS_ERROR
, rpc
->error_string
, rpc
->connect_data
);
294 if (rpc
->is_connected
== 0 && rpc
->fd
!= -1 && revents
&POLLOUT
) {
296 socklen_t err_size
= sizeof(err
);
298 if (getsockopt(rpc
->fd
, SOL_SOCKET
, SO_ERROR
,
299 (char *)&err
, &err_size
) != 0 || err
!= 0) {
303 rpc_set_error(rpc
, "rpc_service: socket error "
304 "%s(%d) while connecting.",
306 rpc
->connect_cb(rpc
, RPC_STATUS_ERROR
,
307 NULL
, rpc
->connect_data
);
311 rpc
->is_connected
= 1;
312 rpc
->connect_cb(rpc
, RPC_STATUS_SUCCESS
, NULL
, rpc
->connect_data
);
316 if (revents
& POLLIN
) {
317 if (rpc_read_from_socket(rpc
) != 0) {
318 rpc_disconnect_requeue(rpc
);
323 if (revents
& POLLOUT
&& rpc
->outqueue
!= NULL
) {
324 if (rpc_write_to_socket(rpc
) != 0) {
325 rpc_set_error(rpc
, "write to socket failed");
334 int rpc_connect_async(struct rpc_context
*rpc
, const char *server
, int port
, rpc_cb cb
, void *private_data
)
336 struct sockaddr_storage s
;
337 struct sockaddr_in
*sin
= (struct sockaddr_in
*)&s
;
341 rpc_set_error(rpc
, "Trying to connect while already connected");
345 if (rpc
->is_udp
!= 0) {
346 rpc_set_error(rpc
, "Trying to connect on UDP socket");
350 sin
->sin_family
= AF_INET
;
351 sin
->sin_port
= htons(port
);
352 if (inet_pton(AF_INET
, server
, &sin
->sin_addr
) != 1) {
353 rpc_set_error(rpc
, "Not a valid server ip address");
357 switch (s
.ss_family
) {
359 socksize
= sizeof(struct sockaddr_in
);
360 #ifdef HAVE_SOCKADDR_LEN
361 sin
->sin_len
= socksize
;
363 rpc
->fd
= socket(AF_INET
, SOCK_STREAM
, IPPROTO_TCP
);
368 rpc_set_error(rpc
, "Failed to open socket");
372 rpc
->connect_cb
= cb
;
373 rpc
->connect_data
= private_data
;
375 set_nonblocking(rpc
->fd
);
377 if (connect(rpc
->fd
, (struct sockaddr
*)&s
, socksize
) != 0 && errno
!= EINPROGRESS
) {
378 rpc_set_error(rpc
, "connect() to server failed");
385 int rpc_disconnect(struct rpc_context
*rpc
, char *error
)
389 closesocket(rpc
->fd
);
396 rpc
->is_connected
= 0;
398 rpc_error_all_pdus(rpc
, error
);
403 /* disconnect but do not error all PDUs, just move pdus in-flight back to the outqueue */
404 static int rpc_disconnect_requeue(struct rpc_context
*rpc
)
410 closesocket(rpc
->fd
);
417 rpc
->is_connected
= 0;
419 /* socket is closed so we will not get any replies to any commands
420 * in flight. Move them all over from the waitpdu queue back to the out queue
422 for (pdu
=rpc
->waitpdu
; pdu
; pdu
=pdu
->next
) {
423 SLIST_REMOVE(&rpc
->waitpdu
, pdu
);
424 SLIST_ADD(&rpc
->outqueue
, pdu
);
431 int rpc_bind_udp(struct rpc_context
*rpc
, char *addr
, int port
)
433 struct addrinfo
*ai
= NULL
;
436 if (rpc
->is_udp
== 0) {
437 rpc_set_error(rpc
, "Cant not bind UDP. Not UDP context");
441 sprintf(service
, "%d", port
);
442 if (getaddrinfo(addr
, service
, NULL
, &ai
) != 0) {
443 rpc_set_error(rpc
, "Invalid address:%s. "
444 "Can not resolv into IPv4/v6 structure.");
448 switch(ai
->ai_family
) {
450 rpc
->fd
= socket(ai
->ai_family
, SOCK_DGRAM
, 0);
452 rpc_set_error(rpc
, "Failed to create UDP socket: %s", strerror(errno
));
457 if (bind(rpc
->fd
, (struct sockaddr
*)ai
->ai_addr
, sizeof(struct sockaddr_in
)) != 0) {
458 rpc_set_error(rpc
, "Failed to bind to UDP socket: %s",strerror(errno
));
464 rpc_set_error(rpc
, "Can not handle UPD sockets of family %d yet", ai
->ai_family
);
474 int rpc_set_udp_destination(struct rpc_context
*rpc
, char *addr
, int port
, int is_broadcast
)
476 struct addrinfo
*ai
= NULL
;
479 if (rpc
->is_udp
== 0) {
480 rpc_set_error(rpc
, "Can not set destination sockaddr. Not UDP context");
484 sprintf(service
, "%d", port
);
485 if (getaddrinfo(addr
, service
, NULL
, &ai
) != 0) {
486 rpc_set_error(rpc
, "Invalid address:%s. "
487 "Can not resolv into IPv4/v6 structure.");
493 rpc
->udp_dest
= NULL
;
495 rpc
->udp_dest
= malloc(ai
->ai_addrlen
);
496 if (rpc
->udp_dest
== NULL
) {
497 rpc_set_error(rpc
, "Out of memory. Failed to allocate sockaddr structure");
500 memcpy(rpc
->udp_dest
, ai
->ai_addr
, ai
->ai_addrlen
);
503 rpc
->is_broadcast
= is_broadcast
;
504 setsockopt(rpc
->fd
, SOL_SOCKET
, SO_BROADCAST
, (char *)&is_broadcast
, sizeof(is_broadcast
));
509 struct sockaddr
*rpc_get_recv_sockaddr(struct rpc_context
*rpc
)
511 return (struct sockaddr
*)&rpc
->udp_src
;