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 | #ifdef _RPC_THREAD_SAFE_ |
57 | #define proglst RPC_THREAD_VARIABLE(svcsimple_proglst_s) |
58 | #else |
59 | static struct proglst_ *proglst; |
60 | #endif |
61 | |
62 | |
63 | static void universal (struct svc_req *rqstp, SVCXPRT *transp_s); |
64 | #ifdef _RPC_THREAD_SAFE_ |
65 | #define transp RPC_THREAD_VARIABLE(svcsimple_transp_s) |
66 | #else |
67 | static SVCXPRT *transp; |
68 | #endif |
69 | |
70 | int |
71 | __registerrpc (u_long prognum, u_long versnum, u_long procnum, |
72 | char *(*progname) (char *), xdrproc_t inproc, xdrproc_t outproc) |
73 | { |
74 | struct proglst_ *pl; |
75 | char *buf; |
76 | |
77 | if (procnum == NULLPROC) |
78 | { |
79 | |
80 | if (__asprintf (&buf, _("can't reassign procedure number %ld\n" ), |
81 | NULLPROC) < 0) |
82 | buf = NULL; |
83 | goto err_out; |
84 | } |
85 | if (transp == 0) |
86 | { |
87 | transp = svcudp_create (RPC_ANYSOCK); |
88 | if (transp == NULL) |
89 | { |
90 | buf = strdup (_("couldn't create an rpc server\n" )); |
91 | goto err_out; |
92 | } |
93 | } |
94 | (void) pmap_unset ((u_long) prognum, (u_long) versnum); |
95 | if (!svc_register (transp, (u_long) prognum, (u_long) versnum, |
96 | universal, IPPROTO_UDP)) |
97 | { |
98 | if (__asprintf (&buf, _("couldn't register prog %ld vers %ld\n" ), |
99 | prognum, versnum) < 0) |
100 | buf = NULL; |
101 | goto err_out; |
102 | } |
103 | pl = (struct proglst_ *) malloc (sizeof (struct proglst_)); |
104 | if (pl == NULL) |
105 | { |
106 | buf = strdup (_("registerrpc: out of memory\n" )); |
107 | goto err_out; |
108 | } |
109 | pl->p_progname = progname; |
110 | pl->p_prognum = prognum; |
111 | pl->p_procnum = procnum; |
112 | pl->p_inproc = inproc; |
113 | pl->p_outproc = outproc; |
114 | pl->p_nxt = proglst; |
115 | proglst = pl; |
116 | return 0; |
117 | |
118 | err_out: |
119 | if (buf == NULL) |
120 | return -1; |
121 | (void) __fxprintf (NULL, "%s" , buf); |
122 | free (buf); |
123 | return -1; |
124 | } |
125 | |
126 | libc_sunrpc_symbol (__registerrpc, registerrpc, GLIBC_2_0) |
127 | |
128 | |
129 | static void |
130 | universal (struct svc_req *rqstp, SVCXPRT *transp_l) |
131 | { |
132 | int prog, proc; |
133 | char *outdata; |
134 | char xdrbuf[UDPMSGSIZE]; |
135 | struct proglst_ *pl; |
136 | char *buf = NULL; |
137 | |
138 | /* |
139 | * enforce "procnum 0 is echo" convention |
140 | */ |
141 | if (rqstp->rq_proc == NULLPROC) |
142 | { |
143 | if (svc_sendreply (transp_l, (xdrproc_t)xdr_void, |
144 | (char *) NULL) == FALSE) |
145 | { |
146 | __write (STDERR_FILENO, "xxx\n" , 4); |
147 | exit (1); |
148 | } |
149 | return; |
150 | } |
151 | prog = rqstp->rq_prog; |
152 | proc = rqstp->rq_proc; |
153 | for (pl = proglst; pl != NULL; pl = pl->p_nxt) |
154 | if (pl->p_prognum == prog && pl->p_procnum == proc) |
155 | { |
156 | /* decode arguments into a CLEAN buffer */ |
157 | __bzero (xdrbuf, sizeof (xdrbuf)); /* required ! */ |
158 | if (!svc_getargs (transp_l, pl->p_inproc, xdrbuf)) |
159 | { |
160 | svcerr_decode (transp_l); |
161 | return; |
162 | } |
163 | outdata = (*(pl->p_progname)) (xdrbuf); |
164 | if (outdata == NULL && pl->p_outproc != (xdrproc_t)xdr_void) |
165 | /* there was an error */ |
166 | return; |
167 | if (!svc_sendreply (transp_l, pl->p_outproc, outdata)) |
168 | { |
169 | if (__asprintf (&buf, _("trouble replying to prog %d\n" ), |
170 | pl->p_prognum) < 0) |
171 | buf = NULL; |
172 | goto err_out2; |
173 | } |
174 | /* free the decoded arguments */ |
175 | (void) svc_freeargs (transp_l, pl->p_inproc, xdrbuf); |
176 | return; |
177 | } |
178 | if (__asprintf (&buf, _("never registered prog %d\n" ), prog) < 0) |
179 | buf = NULL; |
180 | err_out2: |
181 | if (buf == NULL) |
182 | exit (1); |
183 | __fxprintf (NULL, "%s" , buf); |
184 | free (buf); |
185 | exit (1); |
186 | } |
187 | |