lh | 9ed821d | 2023-04-07 01:36:19 -0700 | [diff] [blame^] | 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 | } |