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/>.
22 #include "aros_compat.h"
26 #include "win32_compat.h"
28 #include <arpa/inet.h>
39 #ifdef HAVE_SYS_IOCTL_H
40 #include <sys/ioctl.h>
43 #ifdef HAVE_SYS_SOCKET_H
44 #include <sys/socket.h>
51 #ifdef HAVE_SYS_FILIO_H
52 #include <sys/filio.h>
55 #ifdef HAVE_SYS_SOCKIO_H
56 #include <sys/sockio.h>
65 #include <sys/types.h>
66 #include "libnfs-zdr.h"
68 #include "libnfs-raw.h"
69 #include "libnfs-private.h"
73 //has to be included after stdlib!!
74 #include "win32_errnowrapper.h"
78 static int rpc_reconnect_requeue(struct rpc_context
*rpc
);
79 static int rpc_connect_sockaddr_async(struct rpc_context
*rpc
, struct sockaddr_storage
*s
);
81 static void set_nonblocking(int fd
)
86 v
= ioctl(fd
, FIONBIO
, &nonblocking
);
88 v
= fcntl(fd
, F_GETFL
, 0);
89 fcntl(fd
, F_SETFL
, v
| O_NONBLOCK
);
93 int rpc_get_fd(struct rpc_context
*rpc
)
95 assert(rpc
->magic
== RPC_CONTEXT_MAGIC
);
100 int rpc_which_events(struct rpc_context
*rpc
)
104 assert(rpc
->magic
== RPC_CONTEXT_MAGIC
);
106 events
= rpc
->is_connected
? POLLIN
: POLLOUT
;
108 if (rpc
->is_udp
!= 0) {
109 /* for udp sockets we only wait for pollin */
119 static int rpc_write_to_socket(struct rpc_context
*rpc
)
123 assert(rpc
->magic
== RPC_CONTEXT_MAGIC
);
126 rpc_set_error(rpc
, "trying to write but not connected");
130 while (rpc
->outqueue
!= NULL
) {
133 total
= rpc
->outqueue
->outdata
.size
;
135 count
= send(rpc
->fd
, rpc
->outqueue
->outdata
.data
+ rpc
->outqueue
->written
, total
- rpc
->outqueue
->written
, 0);
137 if (errno
== EAGAIN
|| errno
== EWOULDBLOCK
) {
140 rpc_set_error(rpc
, "Error when writing to socket :%s(%d)", strerror(errno
), errno
);
144 rpc
->outqueue
->written
+= count
;
145 if (rpc
->outqueue
->written
== total
) {
146 struct rpc_pdu
*pdu
= rpc
->outqueue
;
148 SLIST_REMOVE(&rpc
->outqueue
, pdu
);
149 SLIST_ADD_END(&rpc
->waitpdu
, pdu
);
155 static int rpc_read_from_socket(struct rpc_context
*rpc
)
162 assert(rpc
->magic
== RPC_CONTEXT_MAGIC
);
164 assert(rpc
->magic
== RPC_CONTEXT_MAGIC
);
166 if (ioctl(rpc
->fd
, FIONREAD
, &available
) != 0) {
167 rpc_set_error(rpc
, "Ioctl FIONREAD returned error : %d. Closing socket.", errno
);
171 if (available
== 0) {
172 rpc_set_error(rpc
, "Socket has been closed");
178 socklen_t socklen
= sizeof(rpc
->udp_src
);
180 buf
= malloc(available
);
182 rpc_set_error(rpc
, "Failed to malloc buffer for recvfrom");
185 count
= recvfrom(rpc
->fd
, buf
, available
, MSG_DONTWAIT
, (struct sockaddr
*)&rpc
->udp_src
, &socklen
);
187 rpc_set_error(rpc
, "Failed recvfrom: %s", strerror(errno
));
190 if (rpc_process_pdu(rpc
, buf
, count
) != 0) {
191 rpc_set_error(rpc
, "Invalid/garbage pdu received from server. Ignoring PDU");
199 /* read record marker, 4 bytes at the beginning of every pdu */
200 if (rpc
->inbuf
== NULL
) {
202 rpc
->inbuf
= malloc(rpc
->insize
);
203 if (rpc
->inbuf
== NULL
) {
204 rpc_set_error(rpc
, "Failed to allocate buffer for record marker, errno:%d. Closing socket.", errno
);
208 if (rpc
->inpos
< 4) {
209 size
= 4 - rpc
->inpos
;
211 count
= recv(rpc
->fd
, rpc
->inbuf
+ rpc
->inpos
, size
, 0);
213 if (errno
== EINTR
) {
216 rpc_set_error(rpc
, "Read from socket failed, errno:%d. Closing socket.", errno
);
223 if (available
== 0) {
227 pdu_size
= rpc_get_pdu_size(rpc
->inbuf
);
228 if (rpc
->insize
< pdu_size
) {
231 buf
= malloc(pdu_size
);
233 rpc_set_error(rpc
, "Failed to allocate buffer of %d bytes for pdu, errno:%d. Closing socket.", pdu_size
, errno
);
236 memcpy(buf
, rpc
->inbuf
, rpc
->insize
);
239 rpc
->insize
= rpc_get_pdu_size(rpc
->inbuf
);
243 if (size
> rpc
->insize
- rpc
->inpos
) {
244 size
= rpc
->insize
- rpc
->inpos
;
247 count
= recv(rpc
->fd
, rpc
->inbuf
+ rpc
->inpos
, size
, 0);
249 if (errno
== EINTR
) {
252 rpc_set_error(rpc
, "Read from socket failed, errno:%d. Closing socket.", errno
);
258 if (rpc
->inpos
== rpc
->insize
) {
259 if (rpc_process_pdu(rpc
, rpc
->inbuf
, pdu_size
) != 0) {
260 rpc_set_error(rpc
, "Invalid/garbage pdu received from server. Closing socket");
274 int rpc_service(struct rpc_context
*rpc
, int revents
)
276 assert(rpc
->magic
== RPC_CONTEXT_MAGIC
);
278 if (revents
& POLLERR
) {
284 socklen_t err_size
= sizeof(err
);
286 if (getsockopt(rpc
->fd
, SOL_SOCKET
, SO_ERROR
,
287 (char *)&err
, &err_size
) != 0 || err
!= 0) {
291 rpc_set_error(rpc
, "rpc_service: socket error "
295 rpc_set_error(rpc
, "rpc_service: POLLERR, "
296 "Unknown socket error.");
298 if (rpc
->connect_cb
!= NULL
) {
299 rpc
->connect_cb(rpc
, RPC_STATUS_ERROR
, rpc
->error_string
, rpc
->connect_data
);
303 if (revents
& POLLHUP
) {
304 rpc_set_error(rpc
, "Socket failed with POLLHUP");
305 if (rpc
->connect_cb
!= NULL
) {
306 rpc
->connect_cb(rpc
, RPC_STATUS_ERROR
, rpc
->error_string
, rpc
->connect_data
);
311 if (rpc
->is_connected
== 0 && rpc
->fd
!= -1 && revents
&POLLOUT
) {
313 socklen_t err_size
= sizeof(err
);
315 if (getsockopt(rpc
->fd
, SOL_SOCKET
, SO_ERROR
,
316 (char *)&err
, &err_size
) != 0 || err
!= 0) {
320 rpc_set_error(rpc
, "rpc_service: socket error "
321 "%s(%d) while connecting.",
323 if (rpc
->connect_cb
!= NULL
) {
324 rpc
->connect_cb(rpc
, RPC_STATUS_ERROR
,
325 NULL
, rpc
->connect_data
);
330 rpc
->is_connected
= 1;
331 if (rpc
->connect_cb
!= NULL
) {
332 rpc
->connect_cb(rpc
, RPC_STATUS_SUCCESS
, NULL
, rpc
->connect_data
);
337 if (revents
& POLLIN
) {
338 if (rpc_read_from_socket(rpc
) != 0) {
339 rpc_reconnect_requeue(rpc
);
344 if (revents
& POLLOUT
&& rpc
->outqueue
!= NULL
) {
345 if (rpc_write_to_socket(rpc
) != 0) {
346 rpc_set_error(rpc
, "write to socket failed");
354 void rpc_set_autoreconnect(struct rpc_context
*rpc
)
356 assert(rpc
->magic
== RPC_CONTEXT_MAGIC
);
358 rpc
->auto_reconnect
= 1;
361 void rpc_unset_autoreconnect(struct rpc_context
*rpc
)
363 assert(rpc
->magic
== RPC_CONTEXT_MAGIC
);
365 rpc
->auto_reconnect
= 0;
368 static int rpc_connect_sockaddr_async(struct rpc_context
*rpc
, struct sockaddr_storage
*s
)
372 assert(rpc
->magic
== RPC_CONTEXT_MAGIC
);
374 switch (s
->ss_family
) {
376 socksize
= sizeof(struct sockaddr_in
);
377 rpc
->fd
= socket(AF_INET
, SOCK_STREAM
, IPPROTO_TCP
);
380 rpc_set_error(rpc
, "Can not handle AF_FAMILY:%d", s
->ss_family
);
385 rpc_set_error(rpc
, "Failed to open socket");
389 /* Some systems allow you to set capabilities on an executable
390 * to allow the file to be executed with privilege to bind to
391 * privileged system ports, even if the user is not root.
393 * Opportunistically try to bind the socket to a low numbered
394 * system port in the hope that the user is either root or the
395 * executable has the CAP_NET_BIND_SERVICE.
397 * As soon as we fail the bind() with EACCES we know we will never
398 * be able to bind to a system port so we terminate the loop.
401 * sudo setcap 'cap_net_bind_service=+ep' /path/executable
402 * to make the executable able to bind to a system port.
404 * On Windows, there is no concept of privileged ports. Thus
405 * binding will usually succeed.
408 struct sockaddr_in sin
;
409 static int portOfs
= 0;
410 const int firstPort
= 512; /* >= 512 according to Sun docs */
411 const int portCount
= IPPORT_RESERVED
- firstPort
;
412 int startOfs
, port
, rc
;
415 portOfs
= time(NULL
) % 400;
420 port
= htons(firstPort
+ portOfs
);
421 portOfs
= (portOfs
+ 1) % portCount
;
423 /* skip well-known ports */
424 if (!getservbyport(port
, "tcp")) {
425 memset(&sin
, 0, sizeof(sin
));
427 sin
.sin_family
= AF_INET
;
428 sin
.sin_addr
.s_addr
= 0;
430 rc
= bind(rpc
->fd
, (struct sockaddr
*)&sin
, sizeof(struct sockaddr_in
));
432 /* we got EACCES, so don't try again */
433 if (rc
!= 0 && errno
== EACCES
)
437 } while (rc
!= 0 && portOfs
!= startOfs
);
440 set_nonblocking(rpc
->fd
);
442 if (connect(rpc
->fd
, (struct sockaddr
*)s
, socksize
) != 0 && errno
!= EINPROGRESS
) {
443 rpc_set_error(rpc
, "connect() to server failed. %s(%d)", strerror(errno
), errno
);
450 int rpc_connect_async(struct rpc_context
*rpc
, const char *server
, int port
, rpc_cb cb
, void *private_data
)
452 struct sockaddr_in
*sin
= (struct sockaddr_in
*)&rpc
->s
;
454 assert(rpc
->magic
== RPC_CONTEXT_MAGIC
);
457 rpc_set_error(rpc
, "Trying to connect while already connected");
461 if (rpc
->is_udp
!= 0) {
462 rpc_set_error(rpc
, "Trying to connect on UDP socket");
466 rpc
->auto_reconnect
= 0;
468 sin
->sin_family
= AF_INET
;
469 sin
->sin_port
= htons(port
);
470 if (inet_pton(AF_INET
, server
, &sin
->sin_addr
) != 1) {
471 rpc_set_error(rpc
, "Not a valid server ip address");
476 switch (rpc
->s
.ss_family
) {
478 #ifdef HAVE_SOCKADDR_LEN
479 sin
->sin_len
= sizeof(struct sockaddr_in
);
484 rpc
->connect_cb
= cb
;
485 rpc
->connect_data
= private_data
;
487 if (rpc_connect_sockaddr_async(rpc
, &rpc
->s
) != 0) {
494 int rpc_disconnect(struct rpc_context
*rpc
, char *error
)
496 assert(rpc
->magic
== RPC_CONTEXT_MAGIC
);
498 rpc_unset_autoreconnect(rpc
);
505 rpc
->is_connected
= 0;
507 rpc_error_all_pdus(rpc
, error
);
512 static void reconnect_cb(struct rpc_context
*rpc
, int status
, void *data _U_
, void *private_data
)
514 assert(rpc
->magic
== RPC_CONTEXT_MAGIC
);
516 if (status
!= RPC_STATUS_SUCCESS
) {
517 rpc_error_all_pdus(rpc
, "RPC ERROR: Failed to reconnect async");
521 rpc
->is_connected
= 1;
522 rpc
->connect_cb
= NULL
;
525 /* disconnect but do not error all PDUs, just move pdus in-flight back to the outqueue and reconnect */
526 static int rpc_reconnect_requeue(struct rpc_context
*rpc
)
530 assert(rpc
->magic
== RPC_CONTEXT_MAGIC
);
537 rpc
->is_connected
= 0;
539 /* socket is closed so we will not get any replies to any commands
540 * in flight. Move them all over from the waitpdu queue back to the out queue
542 for (pdu
=rpc
->waitpdu
; pdu
; pdu
=pdu
->next
) {
543 SLIST_REMOVE(&rpc
->waitpdu
, pdu
);
544 SLIST_ADD(&rpc
->outqueue
, pdu
);
545 /* we have to re-send the whole pdu again */
549 if (rpc
->auto_reconnect
!= 0) {
550 rpc
->connect_cb
= reconnect_cb
;
552 if (rpc_connect_sockaddr_async(rpc
, &rpc
->s
) != 0) {
553 rpc_error_all_pdus(rpc
, "RPC ERROR: Failed to reconnect async");
562 int rpc_bind_udp(struct rpc_context
*rpc
, char *addr
, int port
)
564 struct addrinfo
*ai
= NULL
;
567 assert(rpc
->magic
== RPC_CONTEXT_MAGIC
);
569 if (rpc
->is_udp
== 0) {
570 rpc_set_error(rpc
, "Cant not bind UDP. Not UDP context");
574 sprintf(service
, "%d", port
);
575 if (getaddrinfo(addr
, service
, NULL
, &ai
) != 0) {
576 rpc_set_error(rpc
, "Invalid address:%s. "
577 "Can not resolv into IPv4/v6 structure.");
581 switch(ai
->ai_family
) {
583 rpc
->fd
= socket(ai
->ai_family
, SOCK_DGRAM
, 0);
585 rpc_set_error(rpc
, "Failed to create UDP socket: %s", strerror(errno
));
590 if (bind(rpc
->fd
, (struct sockaddr
*)ai
->ai_addr
, sizeof(struct sockaddr_in
)) != 0) {
591 rpc_set_error(rpc
, "Failed to bind to UDP socket: %s",strerror(errno
));
597 rpc_set_error(rpc
, "Can not handle UPD sockets of family %d yet", ai
->ai_family
);
607 int rpc_set_udp_destination(struct rpc_context
*rpc
, char *addr
, int port
, int is_broadcast
)
609 struct addrinfo
*ai
= NULL
;
612 assert(rpc
->magic
== RPC_CONTEXT_MAGIC
);
614 if (rpc
->is_udp
== 0) {
615 rpc_set_error(rpc
, "Can not set destination sockaddr. Not UDP context");
619 sprintf(service
, "%d", port
);
620 if (getaddrinfo(addr
, service
, NULL
, &ai
) != 0) {
621 rpc_set_error(rpc
, "Invalid address:%s. "
622 "Can not resolv into IPv4/v6 structure.");
628 rpc
->udp_dest
= NULL
;
630 rpc
->udp_dest
= malloc(ai
->ai_addrlen
);
631 if (rpc
->udp_dest
== NULL
) {
632 rpc_set_error(rpc
, "Out of memory. Failed to allocate sockaddr structure");
636 memcpy(rpc
->udp_dest
, ai
->ai_addr
, ai
->ai_addrlen
);
639 rpc
->is_broadcast
= is_broadcast
;
640 setsockopt(rpc
->fd
, SOL_SOCKET
, SO_BROADCAST
, (char *)&is_broadcast
, sizeof(is_broadcast
));
645 struct sockaddr
*rpc_get_recv_sockaddr(struct rpc_context
*rpc
)
647 assert(rpc
->magic
== RPC_CONTEXT_MAGIC
);
649 return (struct sockaddr
*)&rpc
->udp_src
;
652 int rpc_queue_length(struct rpc_context
*rpc
)
657 assert(rpc
->magic
== RPC_CONTEXT_MAGIC
);
659 for(pdu
= rpc
->outqueue
; pdu
; pdu
= pdu
->next
) {
662 for(pdu
= rpc
->waitpdu
; pdu
; pdu
= pdu
->next
) {