2 Copyright (C) by Ronnie Sahlberg <ronniesahlberg@gmail.com> 2010
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 3 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 General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program; if not, see <http://www.gnu.org/licenses/>.
21 #include <rpc/rpc_msg.h>
22 #include <ccan/compiler/compiler.h>
23 #include "dlinklist.h"
25 #include "libnfs-raw.h"
26 #include "libnfs-private.h"
28 struct rpc_pdu *rpc_allocate_pdu(struct rpc_context *rpc, int program, int version, int procedure, rpc_cb cb, void *private_data, xdrproc_t xdr_decode_fn, int xdr_decode_bufsize)
34 printf("trying to allocate rpc pdu on NULL context\n");
38 pdu = malloc(sizeof(struct rpc_pdu));
40 printf("Failed to allocate pdu structure\n");
43 bzero(pdu, sizeof(struct rpc_pdu));
44 pdu->xid = rpc->xid++;
46 pdu->private_data = private_data;
47 pdu->xdr_decode_fn = xdr_decode_fn;
48 pdu->xdr_decode_bufsize = xdr_decode_bufsize;
50 xdrmem_create(&pdu->xdr, rpc->encodebuf, rpc->encodebuflen, XDR_ENCODE);
51 xdr_setpos(&pdu->xdr, 4); /* skip past the record marker */
53 bzero(&msg, sizeof(struct rpc_msg));
54 msg.rm_xid = pdu->xid;
55 msg.rm_direction = CALL;
56 msg.rm_call.cb_rpcvers = RPC_MSG_VERSION;
57 msg.rm_call.cb_prog = program;
58 msg.rm_call.cb_vers = version;
59 msg.rm_call.cb_proc = procedure;
60 msg.rm_call.cb_cred = rpc->auth->ah_cred;
61 msg.rm_call.cb_verf = rpc->auth->ah_verf;
63 if (xdr_callmsg(&pdu->xdr, &msg) == 0) {
64 printf("xdr_callmsg failed\n");
65 xdr_destroy(&pdu->xdr);
73 void rpc_free_pdu(struct rpc_context *rpc UNUSED, struct rpc_pdu *pdu)
75 if (pdu->outdata.data != NULL) {
76 free(pdu->outdata.data);
77 pdu->outdata.data = NULL;
80 if (pdu->xdr_decode_buf != NULL) {
81 xdr_free(pdu->xdr_decode_fn, pdu->xdr_decode_buf);
82 free(pdu->xdr_decode_buf);
83 pdu->xdr_decode_buf = NULL;
86 xdr_destroy(&pdu->xdr);
91 int rpc_queue_pdu(struct rpc_context *rpc, struct rpc_pdu *pdu)
93 int size, recordmarker;
95 size = xdr_getpos(&pdu->xdr);
97 /* write recordmarker */
98 xdr_setpos(&pdu->xdr, 0);
99 recordmarker = (size - 4) | 0x80000000;
100 xdr_int(&pdu->xdr, &recordmarker);
102 pdu->outdata.size = size;
103 pdu->outdata.data = malloc(pdu->outdata.size);
104 if (pdu->outdata.data == NULL) {
105 rpc_set_error(rpc, "Out of memory. Failed to allocate buffer for pdu\n");
106 rpc_free_pdu(rpc, pdu);
110 memcpy(pdu->outdata.data, rpc->encodebuf, pdu->outdata.size);
111 DLIST_ADD_END(rpc->outqueue, pdu, NULL);
116 int rpc_get_pdu_size(char *buf)
120 size = ntohl(*(uint32_t *)buf);
122 if ((size & 0x80000000) == 0) {
123 printf("cant handle oncrpc fragments\n");
127 return (size & 0x7fffffff) + 4;
130 static int rpc_process_reply(struct rpc_context *rpc, struct rpc_pdu *pdu, XDR *xdr)
134 bzero(&msg, sizeof(struct rpc_msg));
135 msg.acpted_rply.ar_verf = _null_auth;
136 if (pdu->xdr_decode_bufsize > 0) {
137 pdu->xdr_decode_buf = malloc(pdu->xdr_decode_bufsize);
138 if (pdu->xdr_decode_buf == NULL) {
139 printf("xdr_replymsg failed in portmap_getport_reply\n");
140 pdu->cb(rpc, RPC_STATUS_ERROR, "Failed to allocate buffer for decoding of XDR reply", pdu->private_data);
143 bzero(pdu->xdr_decode_buf, pdu->xdr_decode_bufsize);
145 msg.acpted_rply.ar_results.where = pdu->xdr_decode_buf;
146 msg.acpted_rply.ar_results.proc = pdu->xdr_decode_fn;
148 if (xdr_replymsg(xdr, &msg) == 0) {
149 printf("xdr_replymsg failed in portmap_getport_reply\n");
150 pdu->cb(rpc, RPC_STATUS_ERROR, "Message rejected by server", pdu->private_data);
151 if (pdu->xdr_decode_buf != NULL) {
152 free(pdu->xdr_decode_buf);
153 pdu->xdr_decode_buf = NULL;
157 if (msg.rm_reply.rp_stat != MSG_ACCEPTED) {
158 pdu->cb(rpc, RPC_STATUS_ERROR, "RPC Packet not accepted by the server", pdu->private_data);
161 switch (msg.rm_reply.rp_acpt.ar_stat) {
163 pdu->cb(rpc, RPC_STATUS_SUCCESS, pdu->xdr_decode_buf, pdu->private_data);
166 pdu->cb(rpc, RPC_STATUS_ERROR, "Server responded: Program not available", pdu->private_data);
169 pdu->cb(rpc, RPC_STATUS_ERROR, "Server responded: Program version mismatch", pdu->private_data);
172 pdu->cb(rpc, RPC_STATUS_ERROR, "Server responded: Procedure not available", pdu->private_data);
175 pdu->cb(rpc, RPC_STATUS_ERROR, "Server responded: Garbage arguments", pdu->private_data);
178 pdu->cb(rpc, RPC_STATUS_ERROR, "Server responded: System Error", pdu->private_data);
181 pdu->cb(rpc, RPC_STATUS_ERROR, "Unknown rpc response from server", pdu->private_data);
188 int rpc_process_pdu(struct rpc_context *rpc, char *buf, int size)
192 int pos, recordmarker;
195 bzero(&xdr, sizeof(XDR));
197 xdrmem_create(&xdr, buf, size, XDR_DECODE);
198 if (xdr_int(&xdr, &recordmarker) == 0) {
199 printf("xdr_int reading recordmarker failed\n");
203 pos = xdr_getpos(&xdr);
204 if (xdr_int(&xdr, (int *)&xid) == 0) {
205 printf("xdr_int reading xid failed\n");
209 xdr_setpos(&xdr, pos);
211 for (pdu=rpc->waitpdu; pdu; pdu=pdu->next) {
212 if (pdu->xid != xid) {
215 DLIST_REMOVE(rpc->waitpdu, pdu);
216 if (rpc_process_reply(rpc, pdu, &xdr) != 0) {
217 printf("rpc_procdess_reply failed\n");
220 rpc_free_pdu(rpc, pdu);
223 printf("No matching pdu found for xid:%d\n", xid);