1 /*
2 * svc_simple.c
3 * Simplified front end to rpc.
4 *
5 * Copyright (c) 2010, Oracle America, Inc.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions are
9 * met:
10 *
11 * * Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * * Redistributions in binary form must reproduce the above
14 * copyright notice, this list of conditions and the following
15 * disclaimer in the documentation and/or other materials
16 * provided with the distribution.
17 * * Neither the name of the "Oracle America, Inc." nor the names of its
18 * contributors may be used to endorse or promote products derived
19 * from this software without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
22 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
23 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
24 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
25 * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
26 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
28 * GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
29 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
30 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
31 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
32 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
33 */
34
35 #include <stdio.h>
36 #include <string.h>
37 #include <libintl.h>
38 #include <unistd.h>
39 #include <rpc/rpc.h>
40 #include <rpc/pmap_clnt.h>
41 #include <sys/socket.h>
42 #include <netdb.h>
43
44 #include <wchar.h>
45 #include <libio/iolibio.h>
46 #include <shlib-compat.h>
47
48 struct proglst_
49 {
50 char *(*p_progname) (char *);
51 int p_prognum;
52 int p_procnum;
53 xdrproc_t p_inproc, p_outproc;
54 struct proglst_ *p_nxt;
55 };
56 #define proglst RPC_THREAD_VARIABLE(svcsimple_proglst_s)
57
58
59 static void universal (struct svc_req *rqstp, SVCXPRT *transp_s);
60 #define transp RPC_THREAD_VARIABLE(svcsimple_transp_s)
61
62 int
63 __registerrpc (u_long prognum, u_long versnum, u_long procnum,
64 char *(*progname) (char *), xdrproc_t inproc, xdrproc_t outproc)
65 {
66 struct proglst_ *pl;
67 char *buf;
68
69 if (procnum == NULLPROC)
70 {
71
72 if (__asprintf (&buf, _("can't reassign procedure number %ld\n"),
73 NULLPROC) < 0)
74 buf = NULL;
75 goto err_out;
76 }
77 if (transp == 0)
78 {
79 transp = svcudp_create (RPC_ANYSOCK);
80 if (transp == NULL)
81 {
82 buf = __strdup (_("couldn't create an rpc server\n"));
83 goto err_out;
84 }
85 }
86 (void) pmap_unset ((u_long) prognum, (u_long) versnum);
87 if (!svc_register (transp, (u_long) prognum, (u_long) versnum,
88 universal, IPPROTO_UDP))
89 {
90 if (__asprintf (&buf, _("couldn't register prog %ld vers %ld\n"),
91 prognum, versnum) < 0)
92 buf = NULL;
93 goto err_out;
94 }
95 pl = (struct proglst_ *) malloc (sizeof (struct proglst_));
96 if (pl == NULL)
97 {
98 buf = __strdup (_("registerrpc: out of memory\n"));
99 goto err_out;
100 }
101 pl->p_progname = progname;
102 pl->p_prognum = prognum;
103 pl->p_procnum = procnum;
104 pl->p_inproc = inproc;
105 pl->p_outproc = outproc;
106 pl->p_nxt = proglst;
107 proglst = pl;
108 return 0;
109
110 err_out:
111 if (buf == NULL)
112 return -1;
113 (void) __fxprintf (NULL, "%s", buf);
114 free (buf);
115 return -1;
116 }
117
118 libc_sunrpc_symbol (__registerrpc, registerrpc, GLIBC_2_0)
119
120
121 static void
122 universal (struct svc_req *rqstp, SVCXPRT *transp_l)
123 {
124 int prog, proc;
125 char *outdata;
126 char xdrbuf[UDPMSGSIZE];
127 struct proglst_ *pl;
128 char *buf = NULL;
129
130 /*
131 * enforce "procnum 0 is echo" convention
132 */
133 if (rqstp->rq_proc == NULLPROC)
134 {
135 if (svc_sendreply (transp_l, (xdrproc_t)xdr_void,
136 (char *) NULL) == FALSE)
137 {
138 __write (STDERR_FILENO, "xxx\n", 4);
139 exit (1);
140 }
141 return;
142 }
143 prog = rqstp->rq_prog;
144 proc = rqstp->rq_proc;
145 for (pl = proglst; pl != NULL; pl = pl->p_nxt)
146 if (pl->p_prognum == prog && pl->p_procnum == proc)
147 {
148 /* decode arguments into a CLEAN buffer */
149 memset (xdrbuf, 0, sizeof (xdrbuf)); /* required ! */
150 if (!svc_getargs (transp_l, pl->p_inproc, xdrbuf))
151 {
152 svcerr_decode (transp_l);
153 return;
154 }
155 outdata = (*(pl->p_progname)) (xdrbuf);
156 if (outdata == NULL && pl->p_outproc != (xdrproc_t)xdr_void)
157 /* there was an error */
158 return;
159 if (!svc_sendreply (transp_l, pl->p_outproc, outdata))
160 {
161 if (__asprintf (&buf, _("trouble replying to prog %d\n"),
162 pl->p_prognum) < 0)
163 buf = NULL;
164 goto err_out2;
165 }
166 /* free the decoded arguments */
167 (void) svc_freeargs (transp_l, pl->p_inproc, xdrbuf);
168 return;
169 }
170 if (__asprintf (&buf, _("never registered prog %d\n"), prog) < 0)
171 buf = NULL;
172 err_out2:
173 if (buf == NULL)
174 exit (1);
175 __fxprintf (NULL, "%s", buf);
176 free (buf);
177 exit (1);
178 }