1 /*
2 * decode_portmap.c
3 *
4 * RPC portmap.
5 *
6 * Copyright (c) 2000 Dug Song <dugsong@monkey.org>
7 *
8 * $Id: decode_portmap.c,v 1.8 2001/03/15 08:33:02 dugsong Exp $
9 */
10
11 #include "config.h"
12
13 #include <sys/types.h>
14 #include <rpc/rpc.h>
15 #include <rpc/pmap_prot.h>
16
17 #include <stdio.h>
18 #include <stdlib.h>
19 #include <libnet.h>
20 #include <nids.h>
21
22 #include "rpc.h"
23 #include "trigger.h"
24 #include "decode.h"
25
26 int
decode_portmap(u_char * buf,int len,u_char * obuf,int olen)27 decode_portmap(u_char *buf, int len, u_char *obuf, int olen)
28 {
29 XDR xdrs;
30 struct rpc_msg msg;
31 struct pmap *pm, pmap;
32 struct xid_map *xm;
33 int hdrlen;
34
35 if ((hdrlen = rpc_decode(buf, len, &msg)) == 0)
36 return (0);
37
38 if (msg.rm_direction == CALL &&
39 msg.rm_call.cb_prog == PMAPPROG &&
40 msg.rm_call.cb_proc == PMAPPROC_GETPORT) {
41 xdrmem_create(&xdrs, buf + hdrlen, len - hdrlen, XDR_DECODE);
42 if (xdr_pmap(&xdrs, &pmap)) {
43 if ((pm = malloc(sizeof(*pm))) != NULL) {
44 *pm = pmap;
45 xid_map_enter(msg.rm_xid, PMAPPROG, PMAPVERS,
46 PMAPPROC_GETPORT, (void *) pm);
47 }
48 }
49 xdr_destroy(&xdrs);
50 }
51 else if (msg.rm_direction == REPLY &&
52 (xm = xid_map_find(msg.rm_xid)) != NULL) {
53 if (msg.rm_reply.rp_stat == MSG_ACCEPTED &&
54 msg.acpted_rply.ar_stat == SUCCESS) {
55 pm = (struct pmap *)xm->data;
56 xdrmem_create(&xdrs, buf + hdrlen, len - hdrlen,
57 XDR_DECODE);
58 if (xdr_u_long(&xdrs, &pm->pm_port)) {
59 trigger_rpc(pm->pm_prog, pm->pm_prot,
60 pm->pm_port);
61 trigger_rpc(pm->pm_prog, pm->pm_prot,
62 0 - (int) pm->pm_port);
63 }
64 xdr_destroy(&xdrs);
65 }
66 free(xm->data);
67 memset(xm, 0, sizeof(*xm));
68 }
69 return (0);
70 }
71