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"
29 #ifdef HAVE_ARPA_INET_H
30 #include <arpa/inet.h>
41 #ifdef HAVE_SYS_IOCTL_H
42 #include <sys/ioctl.h>
45 #ifdef HAVE_SYS_SOCKET_H
46 #include <sys/socket.h>
49 #ifdef HAVE_NETINET_TCP_H
50 #include <netinet/tcp.h>
57 #ifdef HAVE_SYS_FILIO_H
58 #include <sys/filio.h>
61 #ifdef HAVE_SYS_SOCKIO_H
62 #include <sys/sockio.h>
71 #include <sys/types.h>
72 #include "libnfs-zdr.h"
74 #include "libnfs-raw.h"
75 #include "libnfs-private.h"
79 //has to be included after stdlib!!
80 #include "win32_errnowrapper.h"
84 static int rpc_reconnect_requeue(struct rpc_context
*rpc
);
85 static int rpc_connect_sockaddr_async(struct rpc_context
*rpc
, struct sockaddr_storage
*s
);
87 static void set_nonblocking(int fd
)
92 v
= ioctl(fd
, FIONBIO
, &nonblocking
);
94 v
= fcntl(fd
, F_GETFL
, 0);
95 fcntl(fd
, F_SETFL
, v
| O_NONBLOCK
);
99 #ifdef HAVE_NETINET_TCP_H
100 int set_tcp_sockopt(int sockfd
, int optname
, int value
)
104 #if defined(__FreeBSD__) || defined(__sun) || (defined(__APPLE__) && defined(__MACH__))
105 struct protoent
*buf
;
107 if ((buf
= getprotobyname("tcp")) != NULL
)
108 level
= buf
->p_proto
;
115 return setsockopt(sockfd
, level
, optname
, (char *)&value
, sizeof(value
));
119 int rpc_get_fd(struct rpc_context
*rpc
)
121 assert(rpc
->magic
== RPC_CONTEXT_MAGIC
);
126 int rpc_which_events(struct rpc_context
*rpc
)
130 assert(rpc
->magic
== RPC_CONTEXT_MAGIC
);
132 events
= rpc
->is_connected
? POLLIN
: POLLOUT
;
134 if (rpc
->is_udp
!= 0) {
135 /* for udp sockets we only wait for pollin */
145 static int rpc_write_to_socket(struct rpc_context
*rpc
)
149 assert(rpc
->magic
== RPC_CONTEXT_MAGIC
);
152 rpc_set_error(rpc
, "trying to write but not connected");
156 while (rpc
->outqueue
!= NULL
) {
159 total
= rpc
->outqueue
->outdata
.size
;
161 count
= send(rpc
->fd
, rpc
->outqueue
->outdata
.data
+ rpc
->outqueue
->written
, total
- rpc
->outqueue
->written
, 0);
163 if (errno
== EAGAIN
|| errno
== EWOULDBLOCK
) {
166 rpc_set_error(rpc
, "Error when writing to socket :%s(%d)", strerror(errno
), errno
);
170 rpc
->outqueue
->written
+= count
;
171 if (rpc
->outqueue
->written
== total
) {
172 struct rpc_pdu
*pdu
= rpc
->outqueue
;
174 SLIST_REMOVE(&rpc
->outqueue
, pdu
);
175 SLIST_ADD_END(&rpc
->waitpdu
, pdu
);
181 static int rpc_read_from_socket(struct rpc_context
*rpc
)
188 assert(rpc
->magic
== RPC_CONTEXT_MAGIC
);
190 if (ioctl(rpc
->fd
, FIONREAD
, &available
) != 0) {
191 rpc_set_error(rpc
, "Ioctl FIONREAD returned error : %d. Closing socket.", errno
);
195 if (available
== 0) {
196 rpc_set_error(rpc
, "Socket has been closed");
202 socklen_t socklen
= sizeof(rpc
->udp_src
);
204 buf
= malloc(available
);
206 rpc_set_error(rpc
, "Failed to malloc buffer for recvfrom");
209 count
= recvfrom(rpc
->fd
, buf
, available
, MSG_DONTWAIT
, (struct sockaddr
*)&rpc
->udp_src
, &socklen
);
211 rpc_set_error(rpc
, "Failed recvfrom: %s", strerror(errno
));
214 if (rpc_process_pdu(rpc
, buf
, count
) != 0) {
215 rpc_set_error(rpc
, "Invalid/garbage pdu received from server. Ignoring PDU");
223 /* read record marker, 4 bytes at the beginning of every pdu */
224 if (rpc
->inbuf
== NULL
) {
226 rpc
->inbuf
= malloc(rpc
->insize
);
227 if (rpc
->inbuf
== NULL
) {
228 rpc_set_error(rpc
, "Failed to allocate buffer for record marker, errno:%d. Closing socket.", errno
);
232 if (rpc
->inpos
< 4) {
233 size
= 4 - rpc
->inpos
;
235 count
= recv(rpc
->fd
, rpc
->inbuf
+ rpc
->inpos
, size
, 0);
237 if (errno
== EINTR
) {
240 rpc_set_error(rpc
, "Read from socket failed, errno:%d. Closing socket.", errno
);
247 if (available
== 0) {
251 pdu_size
= rpc_get_pdu_size(rpc
->inbuf
);
252 if (rpc
->insize
< pdu_size
) {
255 buf
= malloc(pdu_size
);
257 rpc_set_error(rpc
, "Failed to allocate buffer of %d bytes for pdu, errno:%d. Closing socket.", pdu_size
, errno
);
260 memcpy(buf
, rpc
->inbuf
, rpc
->insize
);
263 rpc
->insize
= rpc_get_pdu_size(rpc
->inbuf
);
267 if (size
> rpc
->insize
- rpc
->inpos
) {
268 size
= rpc
->insize
- rpc
->inpos
;
271 count
= recv(rpc
->fd
, rpc
->inbuf
+ rpc
->inpos
, size
, 0);
273 if (errno
== EINTR
) {
276 rpc_set_error(rpc
, "Read from socket failed, errno:%d. Closing socket.", errno
);
282 if (rpc
->inpos
== rpc
->insize
) {
283 char *buf
= rpc
->inbuf
;
289 if (rpc_process_pdu(rpc
, buf
, pdu_size
) != 0) {
290 rpc_set_error(rpc
, "Invalid/garbage pdu received from server. Closing socket");
301 int rpc_service(struct rpc_context
*rpc
, int revents
)
303 assert(rpc
->magic
== RPC_CONTEXT_MAGIC
);
305 if (revents
& POLLERR
) {
311 socklen_t err_size
= sizeof(err
);
313 if (getsockopt(rpc
->fd
, SOL_SOCKET
, SO_ERROR
,
314 (char *)&err
, &err_size
) != 0 || err
!= 0) {
318 rpc_set_error(rpc
, "rpc_service: socket error "
322 rpc_set_error(rpc
, "rpc_service: POLLERR, "
323 "Unknown socket error.");
325 if (rpc
->connect_cb
!= NULL
) {
326 rpc
->connect_cb(rpc
, RPC_STATUS_ERROR
, rpc
->error_string
, rpc
->connect_data
);
330 if (revents
& POLLHUP
) {
331 rpc_set_error(rpc
, "Socket failed with POLLHUP");
332 if (rpc
->connect_cb
!= NULL
) {
333 rpc
->connect_cb(rpc
, RPC_STATUS_ERROR
, rpc
->error_string
, rpc
->connect_data
);
338 if (rpc
->is_connected
== 0 && rpc
->fd
!= -1 && revents
&POLLOUT
) {
340 socklen_t err_size
= sizeof(err
);
342 if (getsockopt(rpc
->fd
, SOL_SOCKET
, SO_ERROR
,
343 (char *)&err
, &err_size
) != 0 || err
!= 0) {
347 rpc_set_error(rpc
, "rpc_service: socket error "
348 "%s(%d) while connecting.",
350 if (rpc
->connect_cb
!= NULL
) {
351 rpc
->connect_cb(rpc
, RPC_STATUS_ERROR
,
352 NULL
, rpc
->connect_data
);
357 rpc
->is_connected
= 1;
358 if (rpc
->connect_cb
!= NULL
) {
359 rpc
->connect_cb(rpc
, RPC_STATUS_SUCCESS
, NULL
, rpc
->connect_data
);
364 if (revents
& POLLIN
) {
365 if (rpc_read_from_socket(rpc
) != 0) {
366 rpc_reconnect_requeue(rpc
);
371 if (revents
& POLLOUT
&& rpc
->outqueue
!= NULL
) {
372 if (rpc_write_to_socket(rpc
) != 0) {
373 rpc_set_error(rpc
, "write to socket failed");
381 void rpc_set_autoreconnect(struct rpc_context
*rpc
)
383 assert(rpc
->magic
== RPC_CONTEXT_MAGIC
);
385 rpc
->auto_reconnect
= 1;
388 void rpc_unset_autoreconnect(struct rpc_context
*rpc
)
390 assert(rpc
->magic
== RPC_CONTEXT_MAGIC
);
392 rpc
->auto_reconnect
= 0;
395 void rpc_set_tcp_syncnt(struct rpc_context
*rpc
, int v
)
397 assert(rpc
->magic
== RPC_CONTEXT_MAGIC
);
406 static int rpc_connect_sockaddr_async(struct rpc_context
*rpc
, struct sockaddr_storage
*s
)
410 assert(rpc
->magic
== RPC_CONTEXT_MAGIC
);
412 switch (s
->ss_family
) {
414 socksize
= sizeof(struct sockaddr_in
);
415 rpc
->fd
= socket(AF_INET
, SOCK_STREAM
, IPPROTO_TCP
);
416 #ifdef HAVE_NETINET_TCP_H
417 if (rpc
->tcp_syncnt
!= RPC_PARAM_UNDEFINED
) {
418 set_tcp_sockopt(rpc
->fd
, TCP_SYNCNT
, rpc
->tcp_syncnt
);
423 rpc_set_error(rpc
, "Can not handle AF_FAMILY:%d", s
->ss_family
);
428 rpc_set_error(rpc
, "Failed to open socket");
432 /* Some systems allow you to set capabilities on an executable
433 * to allow the file to be executed with privilege to bind to
434 * privileged system ports, even if the user is not root.
436 * Opportunistically try to bind the socket to a low numbered
437 * system port in the hope that the user is either root or the
438 * executable has the CAP_NET_BIND_SERVICE.
440 * As soon as we fail the bind() with EACCES we know we will never
441 * be able to bind to a system port so we terminate the loop.
444 * sudo setcap 'cap_net_bind_service=+ep' /path/executable
445 * to make the executable able to bind to a system port.
447 * On Windows, there is no concept of privileged ports. Thus
448 * binding will usually succeed.
451 struct sockaddr_in sin
;
452 static int portOfs
= 0;
453 const int firstPort
= 512; /* >= 512 according to Sun docs */
454 const int portCount
= IPPORT_RESERVED
- firstPort
;
455 int startOfs
, port
, rc
;
458 portOfs
= time(NULL
) % 400;
463 port
= htons(firstPort
+ portOfs
);
464 portOfs
= (portOfs
+ 1) % portCount
;
466 /* skip well-known ports */
467 if (!getservbyport(port
, "tcp")) {
468 memset(&sin
, 0, sizeof(sin
));
470 sin
.sin_family
= AF_INET
;
471 sin
.sin_addr
.s_addr
= 0;
473 rc
= bind(rpc
->fd
, (struct sockaddr
*)&sin
, sizeof(struct sockaddr_in
));
475 /* we got EACCES, so don't try again */
476 if (rc
!= 0 && errno
== EACCES
)
480 } while (rc
!= 0 && portOfs
!= startOfs
);
483 set_nonblocking(rpc
->fd
);
485 if (connect(rpc
->fd
, (struct sockaddr
*)s
, socksize
) != 0 && errno
!= EINPROGRESS
) {
486 rpc_set_error(rpc
, "connect() to server failed. %s(%d)", strerror(errno
), errno
);
493 int rpc_connect_async(struct rpc_context
*rpc
, const char *server
, int port
, rpc_cb cb
, void *private_data
)
495 struct sockaddr_in
*sin
= (struct sockaddr_in
*)&rpc
->s
;
497 assert(rpc
->magic
== RPC_CONTEXT_MAGIC
);
500 rpc_set_error(rpc
, "Trying to connect while already connected");
504 if (rpc
->is_udp
!= 0) {
505 rpc_set_error(rpc
, "Trying to connect on UDP socket");
509 rpc
->auto_reconnect
= 0;
511 sin
->sin_family
= AF_INET
;
512 sin
->sin_port
= htons(port
);
513 if (inet_pton(AF_INET
, server
, &sin
->sin_addr
) != 1) {
514 rpc_set_error(rpc
, "Not a valid server ip address");
519 switch (rpc
->s
.ss_family
) {
521 #ifdef HAVE_SOCKADDR_LEN
522 sin
->sin_len
= sizeof(struct sockaddr_in
);
527 rpc
->connect_cb
= cb
;
528 rpc
->connect_data
= private_data
;
530 if (rpc_connect_sockaddr_async(rpc
, &rpc
->s
) != 0) {
537 int rpc_disconnect(struct rpc_context
*rpc
, char *error
)
539 assert(rpc
->magic
== RPC_CONTEXT_MAGIC
);
541 rpc_unset_autoreconnect(rpc
);
548 rpc
->is_connected
= 0;
550 rpc_error_all_pdus(rpc
, error
);
555 static void reconnect_cb(struct rpc_context
*rpc
, int status
, void *data _U_
, void *private_data
)
557 assert(rpc
->magic
== RPC_CONTEXT_MAGIC
);
559 if (status
!= RPC_STATUS_SUCCESS
) {
560 rpc_error_all_pdus(rpc
, "RPC ERROR: Failed to reconnect async");
564 rpc
->is_connected
= 1;
565 rpc
->connect_cb
= NULL
;
568 /* disconnect but do not error all PDUs, just move pdus in-flight back to the outqueue and reconnect */
569 static int rpc_reconnect_requeue(struct rpc_context
*rpc
)
573 assert(rpc
->magic
== RPC_CONTEXT_MAGIC
);
580 rpc
->is_connected
= 0;
582 /* socket is closed so we will not get any replies to any commands
583 * in flight. Move them all over from the waitpdu queue back to the out queue
585 for (pdu
=rpc
->waitpdu
; pdu
; pdu
=pdu
->next
) {
586 SLIST_REMOVE(&rpc
->waitpdu
, pdu
);
587 SLIST_ADD(&rpc
->outqueue
, pdu
);
588 /* we have to re-send the whole pdu again */
592 if (rpc
->auto_reconnect
!= 0) {
593 rpc
->connect_cb
= reconnect_cb
;
595 if (rpc_connect_sockaddr_async(rpc
, &rpc
->s
) != 0) {
596 rpc_error_all_pdus(rpc
, "RPC ERROR: Failed to reconnect async");
605 int rpc_bind_udp(struct rpc_context
*rpc
, char *addr
, int port
)
607 struct addrinfo
*ai
= NULL
;
610 assert(rpc
->magic
== RPC_CONTEXT_MAGIC
);
612 if (rpc
->is_udp
== 0) {
613 rpc_set_error(rpc
, "Cant not bind UDP. Not UDP context");
617 sprintf(service
, "%d", port
);
618 if (getaddrinfo(addr
, service
, NULL
, &ai
) != 0) {
619 rpc_set_error(rpc
, "Invalid address:%s. "
620 "Can not resolv into IPv4/v6 structure.");
624 switch(ai
->ai_family
) {
626 rpc
->fd
= socket(ai
->ai_family
, SOCK_DGRAM
, 0);
628 rpc_set_error(rpc
, "Failed to create UDP socket: %s", strerror(errno
));
633 if (bind(rpc
->fd
, (struct sockaddr
*)ai
->ai_addr
, sizeof(struct sockaddr_in
)) != 0) {
634 rpc_set_error(rpc
, "Failed to bind to UDP socket: %s",strerror(errno
));
640 rpc_set_error(rpc
, "Can not handle UPD sockets of family %d yet", ai
->ai_family
);
650 int rpc_set_udp_destination(struct rpc_context
*rpc
, char *addr
, int port
, int is_broadcast
)
652 struct addrinfo
*ai
= NULL
;
655 assert(rpc
->magic
== RPC_CONTEXT_MAGIC
);
657 if (rpc
->is_udp
== 0) {
658 rpc_set_error(rpc
, "Can not set destination sockaddr. Not UDP context");
662 sprintf(service
, "%d", port
);
663 if (getaddrinfo(addr
, service
, NULL
, &ai
) != 0) {
664 rpc_set_error(rpc
, "Invalid address:%s. "
665 "Can not resolv into IPv4/v6 structure.");
671 rpc
->udp_dest
= NULL
;
673 rpc
->udp_dest
= malloc(ai
->ai_addrlen
);
674 if (rpc
->udp_dest
== NULL
) {
675 rpc_set_error(rpc
, "Out of memory. Failed to allocate sockaddr structure");
679 memcpy(rpc
->udp_dest
, ai
->ai_addr
, ai
->ai_addrlen
);
682 rpc
->is_broadcast
= is_broadcast
;
683 setsockopt(rpc
->fd
, SOL_SOCKET
, SO_BROADCAST
, (char *)&is_broadcast
, sizeof(is_broadcast
));
688 struct sockaddr
*rpc_get_recv_sockaddr(struct rpc_context
*rpc
)
690 assert(rpc
->magic
== RPC_CONTEXT_MAGIC
);
692 return (struct sockaddr
*)&rpc
->udp_src
;
695 int rpc_queue_length(struct rpc_context
*rpc
)
700 assert(rpc
->magic
== RPC_CONTEXT_MAGIC
);
702 for(pdu
= rpc
->outqueue
; pdu
; pdu
= pdu
->next
) {
705 for(pdu
= rpc
->waitpdu
; pdu
; pdu
= pdu
->next
) {
711 void rpc_set_fd(struct rpc_context
*rpc
, int fd
)
713 assert(rpc
->magic
== RPC_CONTEXT_MAGIC
);