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"
20 #define MSG_DONTWAIT 0
29 #include <sys/socket.h>
30 #include <netinet/in.h>
33 #include "libnfs-zdr.h"
35 #include "libnfs-raw.h"
36 #include "libnfs-private.h"
38 struct rpc_pdu
*rpc_allocate_pdu(struct rpc_context
*rpc
, int program
, int version
, int procedure
, rpc_cb cb
, void *private_data
, zdrproc_t zdr_decode_fn
, int zdr_decode_bufsize
)
47 pdu
= malloc(sizeof(struct rpc_pdu
));
49 rpc_set_error(rpc
, "Out of memory: Failed to allocate pdu structure");
52 memset(pdu
, 0, sizeof(struct rpc_pdu
));
53 pdu
->xid
= rpc
->xid
++;
55 pdu
->private_data
= private_data
;
56 pdu
->zdr_decode_fn
= zdr_decode_fn
;
57 pdu
->zdr_decode_bufsize
= zdr_decode_bufsize
;
59 zdrmem_create(&pdu
->zdr
, rpc
->encodebuf
, rpc
->encodebuflen
, ZDR_ENCODE
);
60 if (rpc
->is_udp
== 0) {
61 zdr_setpos(&pdu
->zdr
, 4); /* skip past the record marker */
64 memset(&msg
, 0, sizeof(struct rpc_msg
));
65 msg
.rm_xid
= pdu
->xid
;
66 msg
.rm_direction
= CALL
;
67 msg
.rm_call
.cb_rpcvers
= RPC_MSG_VERSION
;
68 msg
.rm_call
.cb_prog
= program
;
69 msg
.rm_call
.cb_vers
= version
;
70 msg
.rm_call
.cb_proc
= procedure
;
71 msg
.rm_call
.cb_cred
= rpc
->auth
->ah_cred
;
72 msg
.rm_call
.cb_verf
= rpc
->auth
->ah_verf
;
74 if (zdr_callmsg(&pdu
->zdr
, &msg
) == 0) {
75 rpc_set_error(rpc
, "zdr_callmsg failed");
76 zdr_destroy(&pdu
->zdr
);
84 void rpc_free_pdu(struct rpc_context
*rpc _U_
, struct rpc_pdu
*pdu
)
86 if (pdu
->outdata
.data
!= NULL
) {
87 free(pdu
->outdata
.data
);
88 pdu
->outdata
.data
= NULL
;
91 if (pdu
->zdr_decode_buf
!= NULL
) {
92 zdr_free(pdu
->zdr_decode_fn
, pdu
->zdr_decode_buf
);
93 free(pdu
->zdr_decode_buf
);
94 pdu
->zdr_decode_buf
= NULL
;
97 zdr_destroy(&pdu
->zdr
);
103 int rpc_queue_pdu(struct rpc_context
*rpc
, struct rpc_pdu
*pdu
)
105 int size
, recordmarker
;
107 size
= zdr_getpos(&pdu
->zdr
);
109 /* for udp we dont queue, we just send it straight away */
110 if (rpc
->is_udp
!= 0) {
111 // XXX add a rpc->udp_dest_sock_size and get rid of sys/socket.h and netinet/in.h
112 if (sendto(rpc
->fd
, rpc
->encodebuf
, size
, MSG_DONTWAIT
, rpc
->udp_dest
, sizeof(struct sockaddr_in
)) < 0) {
113 rpc_set_error(rpc
, "Sendto failed with errno %s", strerror(errno
));
114 rpc_free_pdu(rpc
, pdu
);
117 SLIST_ADD_END(&rpc
->waitpdu
, pdu
);
121 /* write recordmarker */
122 zdr_setpos(&pdu
->zdr
, 0);
123 recordmarker
= (size
- 4) | 0x80000000;
124 zdr_int(&pdu
->zdr
, &recordmarker
);
126 pdu
->outdata
.size
= size
;
127 pdu
->outdata
.data
= malloc(pdu
->outdata
.size
);
128 if (pdu
->outdata
.data
== NULL
) {
129 rpc_set_error(rpc
, "Out of memory. Failed to allocate buffer for pdu\n");
130 rpc_free_pdu(rpc
, pdu
);
134 memcpy(pdu
->outdata
.data
, rpc
->encodebuf
, pdu
->outdata
.size
);
135 SLIST_ADD_END(&rpc
->outqueue
, pdu
);
140 int rpc_get_pdu_size(char *buf
)
144 size
= ntohl(*(uint32_t *)buf
);
146 return (size
& 0x7fffffff) + 4;
149 static int rpc_process_reply(struct rpc_context
*rpc
, struct rpc_pdu
*pdu
, ZDR
*zdr
)
153 memset(&msg
, 0, sizeof(struct rpc_msg
));
154 msg
.acpted_rply
.ar_verf
= _null_auth
;
155 if (pdu
->zdr_decode_bufsize
> 0) {
156 if (pdu
->zdr_decode_buf
!= NULL
) {
157 free(pdu
->zdr_decode_buf
);
159 pdu
->zdr_decode_buf
= malloc(pdu
->zdr_decode_bufsize
);
160 if (pdu
->zdr_decode_buf
== NULL
) {
161 rpc_set_error(rpc
, "zdr_replymsg failed in portmap_getport_reply");
162 pdu
->cb(rpc
, RPC_STATUS_ERROR
, "Failed to allocate buffer for decoding of ZDR reply", pdu
->private_data
);
165 memset(pdu
->zdr_decode_buf
, 0, pdu
->zdr_decode_bufsize
);
167 msg
.acpted_rply
.ar_results
.where
= pdu
->zdr_decode_buf
;
168 msg
.acpted_rply
.ar_results
.proc
= pdu
->zdr_decode_fn
;
170 if (zdr_replymsg(zdr
, &msg
) == 0) {
171 rpc_set_error(rpc
, "zdr_replymsg failed in portmap_getport_reply");
172 pdu
->cb(rpc
, RPC_STATUS_ERROR
, "Message rejected by server", pdu
->private_data
);
173 if (pdu
->zdr_decode_buf
!= NULL
) {
174 free(pdu
->zdr_decode_buf
);
175 pdu
->zdr_decode_buf
= NULL
;
179 if (msg
.rm_reply
.rp_stat
!= MSG_ACCEPTED
) {
180 pdu
->cb(rpc
, RPC_STATUS_ERROR
, "RPC Packet not accepted by the server", pdu
->private_data
);
183 switch (msg
.rm_reply
.rp_acpt
.ar_stat
) {
185 pdu
->cb(rpc
, RPC_STATUS_SUCCESS
, pdu
->zdr_decode_buf
, pdu
->private_data
);
188 pdu
->cb(rpc
, RPC_STATUS_ERROR
, "Server responded: Program not available", pdu
->private_data
);
191 pdu
->cb(rpc
, RPC_STATUS_ERROR
, "Server responded: Program version mismatch", pdu
->private_data
);
194 pdu
->cb(rpc
, RPC_STATUS_ERROR
, "Server responded: Procedure not available", pdu
->private_data
);
197 pdu
->cb(rpc
, RPC_STATUS_ERROR
, "Server responded: Garbage arguments", pdu
->private_data
);
200 pdu
->cb(rpc
, RPC_STATUS_ERROR
, "Server responded: System Error", pdu
->private_data
);
203 pdu
->cb(rpc
, RPC_STATUS_ERROR
, "Unknown rpc response from server", pdu
->private_data
);
210 int rpc_process_pdu(struct rpc_context
*rpc
, char *buf
, int size
)
214 int pos
, recordmarker
= 0;
216 char *reasbuf
= NULL
;
218 memset(&zdr
, 0, sizeof(ZDR
));
220 zdrmem_create(&zdr
, buf
, size
, ZDR_DECODE
);
221 if (rpc
->is_udp
== 0) {
222 if (zdr_int(&zdr
, &recordmarker
) == 0) {
223 rpc_set_error(rpc
, "zdr_int reading recordmarker failed");
227 if (!(recordmarker
&0x80000000)) {
229 if (rpc_add_fragment(rpc
, buf
+4, size
-4) != 0) {
230 rpc_set_error(rpc
, "Failed to queue fragment for reassembly.");
238 if (recordmarker
!= 0 && rpc
->fragments
!= NULL
) {
239 struct rpc_fragment
*fragment
;
240 uint32_t total
= size
- 4;
244 for (fragment
= rpc
->fragments
; fragment
; fragment
= fragment
->next
) {
245 total
+= fragment
->size
;
248 reasbuf
= malloc(total
);
249 if (reasbuf
== NULL
) {
250 rpc_set_error(rpc
, "Failed to reassemble PDU");
251 rpc_free_all_fragments(rpc
);
255 for (fragment
= rpc
->fragments
; fragment
; fragment
= fragment
->next
) {
256 memcpy(ptr
, fragment
->data
, fragment
->size
);
257 ptr
+= fragment
->size
;
259 memcpy(ptr
, buf
+ 4, size
- 4);
260 zdrmem_create(&zdr
, reasbuf
, total
, ZDR_DECODE
);
261 rpc_free_all_fragments(rpc
);
264 pos
= zdr_getpos(&zdr
);
265 if (zdr_int(&zdr
, (int *)&xid
) == 0) {
266 rpc_set_error(rpc
, "zdr_int reading xid failed");
268 if (reasbuf
!= NULL
) {
273 zdr_setpos(&zdr
, pos
);
275 for (pdu
=rpc
->waitpdu
; pdu
; pdu
=pdu
->next
) {
276 if (pdu
->xid
!= xid
) {
279 if (rpc
->is_udp
== 0 || rpc
->is_broadcast
== 0) {
280 SLIST_REMOVE(&rpc
->waitpdu
, pdu
);
282 if (rpc_process_reply(rpc
, pdu
, &zdr
) != 0) {
283 rpc_set_error(rpc
, "rpc_procdess_reply failed");
286 if (rpc
->is_udp
== 0 || rpc
->is_broadcast
== 0) {
287 rpc_free_pdu(rpc
, pdu
);
289 if (reasbuf
!= NULL
) {
294 rpc_set_error(rpc
, "No matching pdu found for xid:%d", xid
);
296 if (reasbuf
!= NULL
) {