Commit | Line | Data |
---|---|---|
84004dbf RS |
1 | /* |
2 | Copyright (C) 2010 by Ronnie Sahlberg <ronniesahlberg@gmail.com> | |
3 | ||
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. | |
8 | ||
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. | |
13 | ||
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/>. | |
16 | */ | |
72897005 RS |
17 | #ifdef HAVE_CONFIG_H |
18 | #include "config.h" | |
19 | #endif | |
20 | ||
108c622a RS |
21 | #ifdef AROS |
22 | #include "aros_compat.h" | |
23 | #endif | |
24 | ||
a8a1b858 M |
25 | #ifdef WIN32 |
26 | #include "win32_compat.h" | |
bff8fe46 | 27 | #endif |
6874f61e | 28 | |
72897005 RS |
29 | #ifdef HAVE_NETINET_IN_H |
30 | #include <netinet/in.h> | |
31 | #endif | |
32 | ||
7057e733 RS |
33 | #ifdef HAVE_SYS_SOCKET_H |
34 | #include <sys/socket.h> | |
35 | #endif | |
36 | ||
bff8fe46 RS |
37 | #ifdef HAVE_STRINGS_H |
38 | #include <strings.h> | |
39 | #endif | |
40 | ||
6874f61e | 41 | #include <stdio.h> |
98f5fee8 | 42 | #include <stdlib.h> |
763cd6e3 | 43 | #include <string.h> |
f3a75078 | 44 | #include <assert.h> |
a669857d | 45 | #include <errno.h> |
84004dbf | 46 | #include "slist.h" |
763cd6e3 | 47 | #include "libnfs-zdr.h" |
84004dbf RS |
48 | #include "libnfs.h" |
49 | #include "libnfs-raw.h" | |
50 | #include "libnfs-private.h" | |
51 | ||
763cd6e3 | 52 | 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) |
84004dbf RS |
53 | { |
54 | struct rpc_pdu *pdu; | |
55 | struct rpc_msg msg; | |
56 | ||
f3a75078 | 57 | assert(rpc->magic == RPC_CONTEXT_MAGIC); |
84004dbf RS |
58 | |
59 | pdu = malloc(sizeof(struct rpc_pdu)); | |
60 | if (pdu == NULL) { | |
1896d37b | 61 | rpc_set_error(rpc, "Out of memory: Failed to allocate pdu structure"); |
84004dbf RS |
62 | return NULL; |
63 | } | |
ea98629a | 64 | memset(pdu, 0, sizeof(struct rpc_pdu)); |
84004dbf RS |
65 | pdu->xid = rpc->xid++; |
66 | pdu->cb = cb; | |
67 | pdu->private_data = private_data; | |
763cd6e3 RS |
68 | pdu->zdr_decode_fn = zdr_decode_fn; |
69 | pdu->zdr_decode_bufsize = zdr_decode_bufsize; | |
84004dbf | 70 | |
763cd6e3 | 71 | zdrmem_create(&pdu->zdr, rpc->encodebuf, rpc->encodebuflen, ZDR_ENCODE); |
a1992412 | 72 | if (rpc->is_udp == 0) { |
763cd6e3 | 73 | zdr_setpos(&pdu->zdr, 4); /* skip past the record marker */ |
a1992412 | 74 | } |
84004dbf | 75 | |
ea98629a | 76 | memset(&msg, 0, sizeof(struct rpc_msg)); |
aab6538b RS |
77 | msg.xid = pdu->xid; |
78 | msg.direction = CALL; | |
79 | msg.body.cbody.rpcvers = RPC_MSG_VERSION; | |
80 | msg.body.cbody.prog = program; | |
81 | msg.body.cbody.vers = version; | |
82 | msg.body.cbody.proc = procedure; | |
83 | msg.body.cbody.cred = rpc->auth->ah_cred; | |
84 | msg.body.cbody.verf = rpc->auth->ah_verf; | |
84004dbf | 85 | |
f0cb8042 RS |
86 | if (zdr_callmsg(rpc, &pdu->zdr, &msg) == 0) { |
87 | rpc_set_error(rpc, "zdr_callmsg failed with %s", | |
88 | rpc_get_error(rpc)); | |
763cd6e3 | 89 | zdr_destroy(&pdu->zdr); |
84004dbf RS |
90 | free(pdu); |
91 | return NULL; | |
92 | } | |
93 | ||
94 | return pdu; | |
95 | } | |
96 | ||
f3a75078 | 97 | void rpc_free_pdu(struct rpc_context *rpc, struct rpc_pdu *pdu) |
84004dbf | 98 | { |
f3a75078 RS |
99 | assert(rpc->magic == RPC_CONTEXT_MAGIC); |
100 | ||
84004dbf RS |
101 | if (pdu->outdata.data != NULL) { |
102 | free(pdu->outdata.data); | |
103 | pdu->outdata.data = NULL; | |
104 | } | |
105 | ||
763cd6e3 RS |
106 | if (pdu->zdr_decode_buf != NULL) { |
107 | zdr_free(pdu->zdr_decode_fn, pdu->zdr_decode_buf); | |
108 | free(pdu->zdr_decode_buf); | |
109 | pdu->zdr_decode_buf = NULL; | |
84004dbf RS |
110 | } |
111 | ||
763cd6e3 | 112 | zdr_destroy(&pdu->zdr); |
df5af25f | 113 | |
84004dbf RS |
114 | free(pdu); |
115 | } | |
116 | ||
3b943d2f RS |
117 | void rpc_set_next_xid(struct rpc_context *rpc, uint32_t xid) |
118 | { | |
119 | rpc->xid = xid; | |
120 | } | |
84004dbf RS |
121 | |
122 | int rpc_queue_pdu(struct rpc_context *rpc, struct rpc_pdu *pdu) | |
123 | { | |
124 | int size, recordmarker; | |
125 | ||
f3a75078 RS |
126 | assert(rpc->magic == RPC_CONTEXT_MAGIC); |
127 | ||
763cd6e3 | 128 | size = zdr_getpos(&pdu->zdr); |
84004dbf | 129 | |
a669857d RS |
130 | /* for udp we dont queue, we just send it straight away */ |
131 | if (rpc->is_udp != 0) { | |
763cd6e3 | 132 | // XXX add a rpc->udp_dest_sock_size and get rid of sys/socket.h and netinet/in.h |
a669857d RS |
133 | if (sendto(rpc->fd, rpc->encodebuf, size, MSG_DONTWAIT, rpc->udp_dest, sizeof(struct sockaddr_in)) < 0) { |
134 | rpc_set_error(rpc, "Sendto failed with errno %s", strerror(errno)); | |
135 | rpc_free_pdu(rpc, pdu); | |
136 | return -1; | |
137 | } | |
138 | SLIST_ADD_END(&rpc->waitpdu, pdu); | |
139 | return 0; | |
140 | } | |
141 | ||
84004dbf | 142 | /* write recordmarker */ |
763cd6e3 | 143 | zdr_setpos(&pdu->zdr, 0); |
84004dbf | 144 | recordmarker = (size - 4) | 0x80000000; |
763cd6e3 | 145 | zdr_int(&pdu->zdr, &recordmarker); |
84004dbf RS |
146 | |
147 | pdu->outdata.size = size; | |
148 | pdu->outdata.data = malloc(pdu->outdata.size); | |
149 | if (pdu->outdata.data == NULL) { | |
150 | rpc_set_error(rpc, "Out of memory. Failed to allocate buffer for pdu\n"); | |
151 | rpc_free_pdu(rpc, pdu); | |
152 | return -1; | |
153 | } | |
154 | ||
155 | memcpy(pdu->outdata.data, rpc->encodebuf, pdu->outdata.size); | |
156 | SLIST_ADD_END(&rpc->outqueue, pdu); | |
157 | ||
158 | return 0; | |
159 | } | |
160 | ||
161 | int rpc_get_pdu_size(char *buf) | |
162 | { | |
163 | uint32_t size; | |
164 | ||
165 | size = ntohl(*(uint32_t *)buf); | |
166 | ||
84004dbf RS |
167 | return (size & 0x7fffffff) + 4; |
168 | } | |
169 | ||
763cd6e3 | 170 | static int rpc_process_reply(struct rpc_context *rpc, struct rpc_pdu *pdu, ZDR *zdr) |
84004dbf RS |
171 | { |
172 | struct rpc_msg msg; | |
173 | ||
f3a75078 RS |
174 | assert(rpc->magic == RPC_CONTEXT_MAGIC); |
175 | ||
ea98629a | 176 | memset(&msg, 0, sizeof(struct rpc_msg)); |
aab6538b | 177 | msg.body.rbody.reply.areply.verf = _null_auth; |
763cd6e3 RS |
178 | if (pdu->zdr_decode_bufsize > 0) { |
179 | if (pdu->zdr_decode_buf != NULL) { | |
180 | free(pdu->zdr_decode_buf); | |
1b9917b8 | 181 | } |
763cd6e3 RS |
182 | pdu->zdr_decode_buf = malloc(pdu->zdr_decode_bufsize); |
183 | if (pdu->zdr_decode_buf == NULL) { | |
f0cb8042 RS |
184 | rpc_set_error(rpc, "Failed to allocate memory for " |
185 | "zdr_encode_buf in rpc_process_reply"); | |
186 | pdu->cb(rpc, RPC_STATUS_ERROR, "Failed to allocate " | |
187 | "buffer for decoding of ZDR reply", | |
188 | pdu->private_data); | |
84004dbf RS |
189 | return 0; |
190 | } | |
763cd6e3 | 191 | memset(pdu->zdr_decode_buf, 0, pdu->zdr_decode_bufsize); |
84004dbf | 192 | } |
aab6538b RS |
193 | msg.body.rbody.reply.areply.reply_data.results.where = pdu->zdr_decode_buf; |
194 | msg.body.rbody.reply.areply.reply_data.results.proc = pdu->zdr_decode_fn; | |
84004dbf | 195 | |
f0cb8042 RS |
196 | if (zdr_replymsg(rpc, zdr, &msg) == 0) { |
197 | rpc_set_error(rpc, "zdr_replymsg failed in rpc_process_reply: " | |
198 | "%s", rpc_get_error(rpc)); | |
199 | pdu->cb(rpc, RPC_STATUS_ERROR, "Message rejected by server", | |
200 | pdu->private_data); | |
763cd6e3 RS |
201 | if (pdu->zdr_decode_buf != NULL) { |
202 | free(pdu->zdr_decode_buf); | |
203 | pdu->zdr_decode_buf = NULL; | |
84004dbf RS |
204 | } |
205 | return 0; | |
206 | } | |
aab6538b | 207 | if (msg.body.rbody.stat != MSG_ACCEPTED) { |
84004dbf RS |
208 | pdu->cb(rpc, RPC_STATUS_ERROR, "RPC Packet not accepted by the server", pdu->private_data); |
209 | return 0; | |
210 | } | |
aab6538b | 211 | switch (msg.body.rbody.reply.areply.stat) { |
84004dbf | 212 | case SUCCESS: |
763cd6e3 | 213 | pdu->cb(rpc, RPC_STATUS_SUCCESS, pdu->zdr_decode_buf, pdu->private_data); |
84004dbf RS |
214 | break; |
215 | case PROG_UNAVAIL: | |
216 | pdu->cb(rpc, RPC_STATUS_ERROR, "Server responded: Program not available", pdu->private_data); | |
217 | break; | |
218 | case PROG_MISMATCH: | |
219 | pdu->cb(rpc, RPC_STATUS_ERROR, "Server responded: Program version mismatch", pdu->private_data); | |
220 | break; | |
221 | case PROC_UNAVAIL: | |
222 | pdu->cb(rpc, RPC_STATUS_ERROR, "Server responded: Procedure not available", pdu->private_data); | |
223 | break; | |
224 | case GARBAGE_ARGS: | |
225 | pdu->cb(rpc, RPC_STATUS_ERROR, "Server responded: Garbage arguments", pdu->private_data); | |
226 | break; | |
227 | case SYSTEM_ERR: | |
228 | pdu->cb(rpc, RPC_STATUS_ERROR, "Server responded: System Error", pdu->private_data); | |
229 | break; | |
230 | default: | |
231 | pdu->cb(rpc, RPC_STATUS_ERROR, "Unknown rpc response from server", pdu->private_data); | |
232 | break; | |
233 | } | |
234 | ||
235 | return 0; | |
236 | } | |
237 | ||
238 | int rpc_process_pdu(struct rpc_context *rpc, char *buf, int size) | |
239 | { | |
240 | struct rpc_pdu *pdu; | |
763cd6e3 | 241 | ZDR zdr; |
d678b73e | 242 | int pos, recordmarker = 0; |
b93082da | 243 | uint32_t xid; |
d678b73e | 244 | char *reasbuf = NULL; |
84004dbf | 245 | |
f3a75078 RS |
246 | assert(rpc->magic == RPC_CONTEXT_MAGIC); |
247 | ||
763cd6e3 | 248 | memset(&zdr, 0, sizeof(ZDR)); |
84004dbf | 249 | |
763cd6e3 | 250 | zdrmem_create(&zdr, buf, size, ZDR_DECODE); |
a669857d | 251 | if (rpc->is_udp == 0) { |
763cd6e3 RS |
252 | if (zdr_int(&zdr, &recordmarker) == 0) { |
253 | rpc_set_error(rpc, "zdr_int reading recordmarker failed"); | |
254 | zdr_destroy(&zdr); | |
a669857d RS |
255 | return -1; |
256 | } | |
d678b73e | 257 | if (!(recordmarker&0x80000000)) { |
763cd6e3 | 258 | zdr_destroy(&zdr); |
d678b73e RS |
259 | if (rpc_add_fragment(rpc, buf+4, size-4) != 0) { |
260 | rpc_set_error(rpc, "Failed to queue fragment for reassembly."); | |
261 | return -1; | |
262 | } | |
263 | return 0; | |
264 | } | |
84004dbf | 265 | } |
d678b73e RS |
266 | |
267 | /* reassembly */ | |
268 | if (recordmarker != 0 && rpc->fragments != NULL) { | |
269 | struct rpc_fragment *fragment; | |
574095b9 | 270 | uint32_t total = size - 4; |
d678b73e RS |
271 | char *ptr; |
272 | ||
763cd6e3 | 273 | zdr_destroy(&zdr); |
d678b73e RS |
274 | for (fragment = rpc->fragments; fragment; fragment = fragment->next) { |
275 | total += fragment->size; | |
276 | } | |
277 | ||
278 | reasbuf = malloc(total); | |
279 | if (reasbuf == NULL) { | |
280 | rpc_set_error(rpc, "Failed to reassemble PDU"); | |
281 | rpc_free_all_fragments(rpc); | |
282 | return -1; | |
283 | } | |
284 | ptr = reasbuf; | |
285 | for (fragment = rpc->fragments; fragment; fragment = fragment->next) { | |
286 | memcpy(ptr, fragment->data, fragment->size); | |
287 | ptr += fragment->size; | |
288 | } | |
289 | memcpy(ptr, buf + 4, size - 4); | |
763cd6e3 | 290 | zdrmem_create(&zdr, reasbuf, total, ZDR_DECODE); |
d678b73e RS |
291 | rpc_free_all_fragments(rpc); |
292 | } | |
293 | ||
763cd6e3 RS |
294 | pos = zdr_getpos(&zdr); |
295 | if (zdr_int(&zdr, (int *)&xid) == 0) { | |
296 | rpc_set_error(rpc, "zdr_int reading xid failed"); | |
297 | zdr_destroy(&zdr); | |
d678b73e RS |
298 | if (reasbuf != NULL) { |
299 | free(reasbuf); | |
300 | } | |
84004dbf RS |
301 | return -1; |
302 | } | |
763cd6e3 | 303 | zdr_setpos(&zdr, pos); |
84004dbf RS |
304 | |
305 | for (pdu=rpc->waitpdu; pdu; pdu=pdu->next) { | |
306 | if (pdu->xid != xid) { | |
307 | continue; | |
308 | } | |
a669857d RS |
309 | if (rpc->is_udp == 0 || rpc->is_broadcast == 0) { |
310 | SLIST_REMOVE(&rpc->waitpdu, pdu); | |
311 | } | |
763cd6e3 | 312 | if (rpc_process_reply(rpc, pdu, &zdr) != 0) { |
1896d37b | 313 | rpc_set_error(rpc, "rpc_procdess_reply failed"); |
84004dbf | 314 | } |
763cd6e3 | 315 | zdr_destroy(&zdr); |
a669857d RS |
316 | if (rpc->is_udp == 0 || rpc->is_broadcast == 0) { |
317 | rpc_free_pdu(rpc, pdu); | |
318 | } | |
d678b73e RS |
319 | if (reasbuf != NULL) { |
320 | free(reasbuf); | |
321 | } | |
84004dbf RS |
322 | return 0; |
323 | } | |
1896d37b | 324 | rpc_set_error(rpc, "No matching pdu found for xid:%d", xid); |
763cd6e3 | 325 | zdr_destroy(&zdr); |
d678b73e RS |
326 | if (reasbuf != NULL) { |
327 | free(reasbuf); | |
328 | } | |
84004dbf RS |
329 | return -1; |
330 | } | |
331 |