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