Patrick Schaaf | 2dd59ef | 2012-02-27 22:27:31 +0100 | [diff] [blame] | 1 | /* @(#)pmap_rmt.c 2.2 88/08/01 4.0 RPCSRC */ |
| 2 | /* |
| 3 | * Sun RPC is a product of Sun Microsystems, Inc. and is provided for |
| 4 | * unrestricted use provided that this legend is included on all tape |
| 5 | * media and as a part of the software program in whole or part. Users |
| 6 | * may copy or modify Sun RPC without charge, but are not authorized |
| 7 | * to license or distribute it to anyone else except as part of a product or |
| 8 | * program developed by the user. |
| 9 | * |
| 10 | * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE |
| 11 | * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR |
| 12 | * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE. |
| 13 | * |
| 14 | * Sun RPC is provided with no support and without any obligation on the |
| 15 | * part of Sun Microsystems, Inc. to assist in its use, correction, |
| 16 | * modification or enhancement. |
| 17 | * |
| 18 | * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE |
| 19 | * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC |
| 20 | * OR ANY PART THEREOF. |
| 21 | * |
| 22 | * In no event will Sun Microsystems, Inc. be liable for any lost revenue |
| 23 | * or profits or other special, indirect and consequential damages, even if |
| 24 | * Sun has been advised of the possibility of such damages. |
| 25 | * |
| 26 | * Sun Microsystems, Inc. |
| 27 | * 2550 Garcia Avenue |
| 28 | * Mountain View, California 94043 |
| 29 | */ |
| 30 | #if 0 |
| 31 | static char sccsid[] = "@(#)pmap_rmt.c 1.21 87/08/27 Copyr 1984 Sun Micro"; |
| 32 | #endif |
| 33 | |
| 34 | /* |
| 35 | * pmap_rmt.c |
| 36 | * Client interface to pmap rpc service. |
| 37 | * remote call and broadcast service |
| 38 | * |
| 39 | * Copyright (C) 1984, Sun Microsystems, Inc. |
| 40 | */ |
| 41 | |
| 42 | #define __FORCE_GLIBC |
| 43 | #include <features.h> |
| 44 | |
| 45 | #include <unistd.h> |
| 46 | #include <string.h> |
| 47 | #include <rpc/rpc.h> |
| 48 | #include <rpc/pmap_prot.h> |
| 49 | #include <rpc/pmap_clnt.h> |
| 50 | #include <rpc/pmap_rmt.h> |
| 51 | #include <sys/poll.h> |
| 52 | #include <sys/socket.h> |
| 53 | #include <stdio.h> |
| 54 | #include <errno.h> |
| 55 | #undef _POSIX_SOURCE /* Ultrix <sys/param.h> needs --roland@gnu */ |
| 56 | #include <sys/param.h> /* Ultrix needs before net/if --roland@gnu */ |
| 57 | #include <net/if.h> |
| 58 | #include <sys/ioctl.h> |
| 59 | #include <arpa/inet.h> |
| 60 | #define MAX_BROADCAST_SIZE 1400 |
| 61 | |
maxwen | 27116ba | 2015-08-14 21:41:28 +0200 | [diff] [blame] | 62 | #if defined(ANDROID) && !defined(BIONIC_L) |
| 63 | static struct in_addr inet_makeaddr(in_addr_t net, in_addr_t host) |
Patrick Schaaf | 2dd59ef | 2012-02-27 22:27:31 +0100 | [diff] [blame] | 64 | { |
| 65 | struct in_addr a; |
| 66 | |
| 67 | if (net <= 0x000000ff) |
| 68 | a.s_addr = (net << 24) | (host & 0x000000ff); |
| 69 | else if (net <= 0x0000ffff) |
| 70 | a.s_addr = (net << 16) | (host & 0x0000ffff); |
| 71 | else if (net <= 0x00ffffff) |
| 72 | a.s_addr = (net << 8) | (host & 0x00ffffff); |
| 73 | else |
| 74 | a.s_addr = net | host; |
| 75 | a.s_addr = htonl(a.s_addr); |
| 76 | return a; |
| 77 | } |
maxwen | 27116ba | 2015-08-14 21:41:28 +0200 | [diff] [blame] | 78 | static in_addr_t inet_netof(struct in_addr in) |
Patrick Schaaf | 2dd59ef | 2012-02-27 22:27:31 +0100 | [diff] [blame] | 79 | { |
| 80 | in_addr_t i = ntohl(in.s_addr); |
| 81 | |
| 82 | if (i < 0x80000000) |
| 83 | return i >> 24; |
| 84 | if (i < 0xc0000000) |
| 85 | return i >> 16; |
| 86 | return i >> 8; |
| 87 | } |
| 88 | |
| 89 | #endif |
| 90 | |
| 91 | |
| 92 | extern u_long _create_xid (void) attribute_hidden; |
| 93 | |
| 94 | static const struct timeval timeout = {3, 0}; |
| 95 | |
| 96 | /* |
| 97 | * pmapper remote-call-service interface. |
| 98 | * This routine is used to call the pmapper remote call service |
| 99 | * which will look up a service program in the port maps, and then |
| 100 | * remotely call that routine with the given parameters. This allows |
| 101 | * programs to do a lookup and call in one step. |
| 102 | */ |
| 103 | enum clnt_stat |
| 104 | pmap_rmtcall (struct sockaddr_in *addr, u_long prog, u_long vers, u_long proc, |
| 105 | xdrproc_t xdrargs, caddr_t argsp, xdrproc_t xdrres, caddr_t resp, |
| 106 | struct timeval tout, u_long *port_ptr) |
| 107 | { |
| 108 | int _socket = -1; |
| 109 | CLIENT *client; |
| 110 | struct rmtcallargs a; |
| 111 | struct rmtcallres r; |
| 112 | enum clnt_stat stat; |
| 113 | |
| 114 | addr->sin_port = htons (PMAPPORT); |
| 115 | client = clntudp_create (addr, PMAPPROG, PMAPVERS, timeout, &_socket); |
| 116 | if (client != (CLIENT *) NULL) |
| 117 | { |
| 118 | a.prog = prog; |
| 119 | a.vers = vers; |
| 120 | a.proc = proc; |
| 121 | a.args_ptr = argsp; |
| 122 | a.xdr_args = xdrargs; |
| 123 | r.port_ptr = port_ptr; |
| 124 | r.results_ptr = resp; |
| 125 | r.xdr_results = xdrres; |
| 126 | stat = CLNT_CALL (client, PMAPPROC_CALLIT, (xdrproc_t)xdr_rmtcall_args, |
| 127 | (caddr_t)&a, (xdrproc_t)xdr_rmtcallres, |
| 128 | (caddr_t)&r, tout); |
| 129 | CLNT_DESTROY (client); |
| 130 | } |
| 131 | else |
| 132 | { |
| 133 | stat = RPC_FAILED; |
| 134 | } |
| 135 | /* (void)close(_socket); CLNT_DESTROY already closed it */ |
| 136 | addr->sin_port = 0; |
| 137 | return stat; |
| 138 | } |
| 139 | |
| 140 | |
| 141 | /* |
| 142 | * XDR remote call arguments |
| 143 | * written for XDR_ENCODE direction only |
| 144 | */ |
| 145 | bool_t |
| 146 | xdr_rmtcall_args (XDR *xdrs, struct rmtcallargs *cap) |
| 147 | { |
| 148 | u_int lenposition, argposition, position; |
| 149 | |
| 150 | if (xdr_u_long (xdrs, &(cap->prog)) && |
| 151 | xdr_u_long (xdrs, &(cap->vers)) && |
| 152 | xdr_u_long (xdrs, &(cap->proc))) |
| 153 | { |
| 154 | u_long dummy_arglen = 0; |
| 155 | lenposition = XDR_GETPOS (xdrs); |
| 156 | if (!xdr_u_long (xdrs, &dummy_arglen)) |
| 157 | return FALSE; |
| 158 | argposition = XDR_GETPOS (xdrs); |
| 159 | if (!(*(cap->xdr_args)) (xdrs, cap->args_ptr)) |
| 160 | return FALSE; |
| 161 | position = XDR_GETPOS (xdrs); |
| 162 | cap->arglen = (u_long) position - (u_long) argposition; |
| 163 | XDR_SETPOS (xdrs, lenposition); |
| 164 | if (!xdr_u_long (xdrs, &(cap->arglen))) |
| 165 | return FALSE; |
| 166 | XDR_SETPOS (xdrs, position); |
| 167 | return TRUE; |
| 168 | } |
| 169 | return FALSE; |
| 170 | } |
| 171 | libc_hidden_def(xdr_rmtcall_args) |
| 172 | |
| 173 | /* |
| 174 | * XDR remote call results |
| 175 | * written for XDR_DECODE direction only |
| 176 | */ |
| 177 | bool_t |
| 178 | xdr_rmtcallres (XDR *xdrs, struct rmtcallres *crp) |
| 179 | { |
| 180 | caddr_t port_ptr; |
| 181 | |
| 182 | port_ptr = (caddr_t) crp->port_ptr; |
| 183 | if (xdr_reference (xdrs, &port_ptr, sizeof (u_long), (xdrproc_t) xdr_u_long) |
| 184 | && xdr_u_long (xdrs, &crp->resultslen)) |
| 185 | { |
| 186 | crp->port_ptr = (u_long *) port_ptr; |
| 187 | return (*(crp->xdr_results)) (xdrs, crp->results_ptr); |
| 188 | } |
| 189 | return FALSE; |
| 190 | } |
| 191 | libc_hidden_def(xdr_rmtcallres) |
| 192 | |
| 193 | |
| 194 | /* |
| 195 | * The following is kludged-up support for simple rpc broadcasts. |
| 196 | * Someday a large, complicated system will replace these trivial |
| 197 | * routines which only support udp/ip . |
| 198 | */ |
| 199 | |
| 200 | static int |
| 201 | internal_function |
| 202 | getbroadcastnets (struct in_addr *addrs, int sock, char *buf) |
| 203 | /* int sock: any valid socket will do */ |
| 204 | /* char *buf: why allocate more when we can use existing... */ |
| 205 | { |
| 206 | struct ifconf ifc; |
| 207 | struct ifreq ifreq, *ifr; |
| 208 | struct sockaddr_in *sin; |
| 209 | int n, i; |
| 210 | |
| 211 | ifc.ifc_len = UDPMSGSIZE; |
| 212 | ifc.ifc_buf = buf; |
| 213 | if (ioctl (sock, SIOCGIFCONF, (char *) &ifc) < 0) |
| 214 | { |
| 215 | perror (_("broadcast: ioctl (get interface configuration)")); |
| 216 | return (0); |
| 217 | } |
| 218 | ifr = ifc.ifc_req; |
| 219 | for (i = 0, n = ifc.ifc_len / sizeof (struct ifreq); n > 0; n--, ifr++) |
| 220 | { |
| 221 | ifreq = *ifr; |
| 222 | if (ioctl (sock, SIOCGIFFLAGS, (char *) &ifreq) < 0) |
| 223 | { |
| 224 | perror (_("broadcast: ioctl (get interface flags)")); |
| 225 | continue; |
| 226 | } |
| 227 | if ((ifreq.ifr_flags & IFF_BROADCAST) && |
| 228 | (ifreq.ifr_flags & IFF_UP) && |
| 229 | ifr->ifr_addr.sa_family == AF_INET) |
| 230 | { |
| 231 | sin = (struct sockaddr_in *) &ifr->ifr_addr; |
| 232 | #ifdef SIOCGIFBRDADDR /* 4.3BSD */ |
| 233 | if (ioctl (sock, SIOCGIFBRDADDR, (char *) &ifreq) < 0) |
| 234 | { |
| 235 | addrs[i++] = inet_makeaddr (inet_netof |
| 236 | /* Changed to pass struct instead of s_addr member |
| 237 | by roland@gnu. */ |
| 238 | (sin->sin_addr), INADDR_ANY); |
| 239 | } |
| 240 | else |
| 241 | { |
| 242 | addrs[i++] = ((struct sockaddr_in *) |
| 243 | &ifreq.ifr_addr)->sin_addr; |
| 244 | } |
| 245 | #else /* 4.2 BSD */ |
| 246 | addrs[i++] = inet_makeaddr (inet_netof |
| 247 | (sin->sin_addr.s_addr), INADDR_ANY); |
| 248 | #endif |
| 249 | } |
| 250 | } |
| 251 | return i; |
| 252 | } |
| 253 | |
| 254 | |
| 255 | enum clnt_stat |
| 256 | clnt_broadcast ( |
| 257 | u_long prog, /* program number */ |
| 258 | u_long vers, /* version number */ |
| 259 | u_long proc, /* procedure number */ |
| 260 | xdrproc_t xargs, /* xdr routine for args */ |
| 261 | caddr_t argsp, /* pointer to args */ |
| 262 | xdrproc_t xresults, /* xdr routine for results */ |
| 263 | caddr_t resultsp, /* pointer to results */ |
| 264 | resultproc_t eachresult /* call with each result obtained */) |
| 265 | { |
| 266 | enum clnt_stat stat = RPC_FAILED; |
| 267 | AUTH *unix_auth = authunix_create_default (); |
| 268 | XDR xdr_stream; |
| 269 | XDR *xdrs = &xdr_stream; |
| 270 | struct timeval t; |
| 271 | int outlen, inlen, nets; |
| 272 | socklen_t fromlen; |
| 273 | int sock; |
| 274 | int on = 1; |
| 275 | struct pollfd fd; |
| 276 | int milliseconds; |
| 277 | int i; |
| 278 | bool_t done = FALSE; |
| 279 | u_long xid; |
| 280 | u_long port; |
| 281 | struct in_addr addrs[20]; |
| 282 | struct sockaddr_in baddr, raddr; /* broadcast and response addresses */ |
| 283 | struct rmtcallargs a; |
| 284 | struct rmtcallres r; |
| 285 | struct rpc_msg msg; |
| 286 | char outbuf[MAX_BROADCAST_SIZE], inbuf[UDPMSGSIZE]; |
| 287 | |
| 288 | /* |
| 289 | * initialization: create a socket, a broadcast address, and |
| 290 | * preserialize the arguments into a send buffer. |
| 291 | */ |
| 292 | if ((sock = socket (AF_INET, SOCK_DGRAM, IPPROTO_UDP)) < 0) |
| 293 | { |
| 294 | perror (_("Cannot create socket for broadcast rpc")); |
| 295 | stat = RPC_CANTSEND; |
| 296 | goto done_broad; |
| 297 | } |
| 298 | #ifdef SO_BROADCAST |
| 299 | if (setsockopt (sock, SOL_SOCKET, SO_BROADCAST, &on, sizeof (on)) < 0) |
| 300 | { |
| 301 | perror (_("Cannot set socket option SO_BROADCAST")); |
| 302 | stat = RPC_CANTSEND; |
| 303 | goto done_broad; |
| 304 | } |
| 305 | #endif /* def SO_BROADCAST */ |
| 306 | fd.fd = sock; |
| 307 | fd.events = POLLIN; |
| 308 | nets = getbroadcastnets (addrs, sock, inbuf); |
| 309 | memset ((char *) &baddr, 0, sizeof (baddr)); |
| 310 | baddr.sin_family = AF_INET; |
| 311 | baddr.sin_port = htons (PMAPPORT); |
| 312 | baddr.sin_addr.s_addr = htonl (INADDR_ANY); |
| 313 | /* baddr.sin_addr.S_un.S_addr = htonl(INADDR_ANY); */ |
| 314 | msg.rm_xid = xid = _create_xid (); |
| 315 | t.tv_usec = 0; |
| 316 | msg.rm_direction = CALL; |
| 317 | msg.rm_call.cb_rpcvers = RPC_MSG_VERSION; |
| 318 | msg.rm_call.cb_prog = PMAPPROG; |
| 319 | msg.rm_call.cb_vers = PMAPVERS; |
| 320 | msg.rm_call.cb_proc = PMAPPROC_CALLIT; |
| 321 | msg.rm_call.cb_cred = unix_auth->ah_cred; |
| 322 | msg.rm_call.cb_verf = unix_auth->ah_verf; |
| 323 | a.prog = prog; |
| 324 | a.vers = vers; |
| 325 | a.proc = proc; |
| 326 | a.xdr_args = xargs; |
| 327 | a.args_ptr = argsp; |
| 328 | r.port_ptr = &port; |
| 329 | r.xdr_results = xresults; |
| 330 | r.results_ptr = resultsp; |
| 331 | xdrmem_create (xdrs, outbuf, MAX_BROADCAST_SIZE, XDR_ENCODE); |
| 332 | if ((!xdr_callmsg (xdrs, &msg)) || (!xdr_rmtcall_args (xdrs, &a))) |
| 333 | { |
| 334 | stat = RPC_CANTENCODEARGS; |
| 335 | goto done_broad; |
| 336 | } |
| 337 | outlen = (int) xdr_getpos (xdrs); |
| 338 | xdr_destroy (xdrs); |
| 339 | /* |
| 340 | * Basic loop: broadcast a packet and wait a while for response(s). |
| 341 | * The response timeout grows larger per iteration. |
| 342 | */ |
| 343 | for (t.tv_sec = 4; t.tv_sec <= 14; t.tv_sec += 2) |
| 344 | { |
| 345 | for (i = 0; i < nets; i++) |
| 346 | { |
| 347 | baddr.sin_addr = addrs[i]; |
| 348 | if (sendto (sock, outbuf, outlen, 0, |
| 349 | (struct sockaddr *) &baddr, |
| 350 | sizeof (struct sockaddr)) != outlen) |
| 351 | { |
| 352 | perror (_("Cannot send broadcast packet")); |
| 353 | stat = RPC_CANTSEND; |
| 354 | goto done_broad; |
| 355 | } |
| 356 | } |
| 357 | if (eachresult == NULL) |
| 358 | { |
| 359 | stat = RPC_SUCCESS; |
| 360 | goto done_broad; |
| 361 | } |
| 362 | recv_again: |
| 363 | msg.acpted_rply.ar_verf = _null_auth; |
| 364 | msg.acpted_rply.ar_results.where = (caddr_t) & r; |
| 365 | msg.acpted_rply.ar_results.proc = (xdrproc_t) xdr_rmtcallres; |
| 366 | milliseconds = t.tv_sec * 1000 + t.tv_usec / 1000; |
| 367 | switch (poll(&fd, 1, milliseconds)) |
| 368 | { |
| 369 | |
| 370 | case 0: /* timed out */ |
| 371 | stat = RPC_TIMEDOUT; |
| 372 | continue; |
| 373 | |
| 374 | case -1: /* some kind of error */ |
| 375 | if (errno == EINTR) |
| 376 | goto recv_again; |
| 377 | perror (_("Broadcast poll problem")); |
| 378 | stat = RPC_CANTRECV; |
| 379 | goto done_broad; |
| 380 | |
| 381 | } /* end of poll results switch */ |
| 382 | try_again: |
| 383 | fromlen = sizeof (struct sockaddr); |
| 384 | inlen = recvfrom (sock, inbuf, UDPMSGSIZE, 0, |
| 385 | (struct sockaddr *) &raddr, &fromlen); |
| 386 | if (inlen < 0) |
| 387 | { |
| 388 | if (errno == EINTR) |
| 389 | goto try_again; |
| 390 | perror (_("Cannot receive reply to broadcast")); |
| 391 | stat = RPC_CANTRECV; |
| 392 | goto done_broad; |
| 393 | } |
| 394 | if ((size_t) inlen < sizeof (u_long)) |
| 395 | goto recv_again; |
| 396 | /* |
| 397 | * see if reply transaction id matches sent id. |
| 398 | * If so, decode the results. |
| 399 | */ |
| 400 | xdrmem_create (xdrs, inbuf, (u_int) inlen, XDR_DECODE); |
| 401 | if (xdr_replymsg (xdrs, &msg)) |
| 402 | { |
| 403 | if (((u_int32_t) msg.rm_xid == (u_int32_t) xid) && |
| 404 | (msg.rm_reply.rp_stat == MSG_ACCEPTED) && |
| 405 | (msg.acpted_rply.ar_stat == SUCCESS)) |
| 406 | { |
| 407 | raddr.sin_port = htons ((u_short) port); |
| 408 | done = (*eachresult) (resultsp, &raddr); |
| 409 | } |
| 410 | /* otherwise, we just ignore the errors ... */ |
| 411 | } |
| 412 | else |
| 413 | { |
| 414 | #ifdef notdef |
| 415 | /* some kind of deserialization problem ... */ |
| 416 | if ((u_int32_t) msg.rm_xid == (u_int32_t) xid) |
| 417 | fprintf (stderr, "Broadcast deserialization problem"); |
| 418 | /* otherwise, just random garbage */ |
| 419 | #endif |
| 420 | } |
| 421 | xdrs->x_op = XDR_FREE; |
| 422 | msg.acpted_rply.ar_results.proc = (xdrproc_t)xdr_void; |
| 423 | (void) xdr_replymsg (xdrs, &msg); |
| 424 | (void) (*xresults) (xdrs, resultsp); |
| 425 | xdr_destroy (xdrs); |
| 426 | if (done) |
| 427 | { |
| 428 | stat = RPC_SUCCESS; |
| 429 | goto done_broad; |
| 430 | } |
| 431 | else |
| 432 | { |
| 433 | goto recv_again; |
| 434 | } |
| 435 | } |
| 436 | done_broad: |
| 437 | (void) close (sock); |
| 438 | AUTH_DESTROY (unix_auth); |
| 439 | return stat; |
| 440 | } |