1 /* $NetBSD: svc_generic.c,v 1.3 2000/07/06 03:10:35 christos Exp $ */
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36 #if defined(LIBC_SCCS) && !defined(lint)
37 #ident "@(#)svc_generic.c 1.19 94/04/24 SMI"
38 static char sccsid[] = "@(#)svc_generic.c 1.21 89/02/28 Copyr 1988 Sun Micro";
40 #include <sys/cdefs.h>
41 __FBSDID("$FreeBSD$");
44 * svc_generic.c, Server side for RPC.
48 #include "opt_inet6.h"
50 #include <sys/param.h>
52 #include <sys/kernel.h>
53 #include <sys/malloc.h>
54 #include <sys/mutex.h>
55 #include <sys/protosw.h>
56 #include <sys/queue.h>
57 #include <sys/socket.h>
58 #include <sys/socketvar.h>
59 #include <sys/systm.h>
61 #include <sys/ucred.h>
64 #include <rpc/rpcb_clnt.h>
65 #include <rpc/nettype.h>
67 #include <rpc/rpc_com.h>
69 extern int __svc_vc_setflag(SVCXPRT *, int);
72 * The highest level interface for server creation.
73 * It tries for all the nettokens in that particular class of token
74 * and returns the number of handles it can create and/or find.
76 * It creates a link list of all the handles it could create.
77 * If svc_create() is called multiple times, it uses the handle
78 * created earlier instead of creating a new handle every time.
83 void (*dispatch)(struct svc_req *, SVCXPRT *),
84 rpcprog_t prognum, /* Program number */
85 rpcvers_t versnum, /* Version number */
86 const char *nettype) /* Networktype token */
90 struct netconfig *nconf;
93 if ((handle = __rpc_setconf(nettype)) == NULL) {
94 printf("svc_create: unknown protocol");
97 while ((nconf = __rpc_getconf(handle)) != NULL) {
98 mtx_lock(&pool->sp_lock);
99 TAILQ_FOREACH(xprt, &pool->sp_xlist, xp_link) {
100 if (strcmp(xprt->xp_netid, nconf->nc_netid) == 0) {
101 /* Found an old one, use it */
102 mtx_unlock(&pool->sp_lock);
103 (void) rpcb_unset(prognum, versnum, nconf);
104 if (svc_reg(xprt, prognum, versnum,
105 dispatch, nconf) == FALSE) {
107 "svc_create: could not register prog %u vers %u on %s\n",
108 (unsigned)prognum, (unsigned)versnum,
110 mtx_lock(&pool->sp_lock);
113 mtx_lock(&pool->sp_lock);
118 mtx_unlock(&pool->sp_lock);
120 /* It was not found. Now create a new one */
121 xprt = svc_tp_create(pool, dispatch, prognum, versnum,
127 __rpc_endconf(handle);
129 * In case of num == 0; the error messages are generated by the
130 * underlying layers; and hence not needed here.
136 * The high level interface to svc_tli_create().
137 * It tries to create a server for "nconf" and registers the service
138 * with the rpcbind. It calls svc_tli_create();
143 void (*dispatch)(struct svc_req *, SVCXPRT *),
144 rpcprog_t prognum, /* Program number */
145 rpcvers_t versnum, /* Version number */
146 const char *uaddr, /* Address (or null for default) */
147 const struct netconfig *nconf) /* Netconfig structure for the network */
149 struct netconfig nconfcopy;
150 struct netbuf *taddr;
156 "svc_tp_create: invalid netconfig structure for prog %u vers %u\n",
157 (unsigned)prognum, (unsigned)versnum);
161 taddr = uaddr2taddr(nconf, uaddr);
164 bind.qlen = SOMAXCONN;
165 xprt = svc_tli_create(pool, NULL, nconf, &bind, 0, 0);
166 free(bind.addr.buf, M_RPC);
168 xprt = svc_tli_create(pool, NULL, nconf, NULL, 0, 0);
173 /*LINTED const castaway*/
175 (void) rpcb_unset(prognum, versnum, &nconfcopy);
176 if (svc_reg(xprt, prognum, versnum, dispatch, nconf) == FALSE) {
178 "svc_tp_create: Could not register prog %u vers %u on %s\n",
179 (unsigned)prognum, (unsigned)versnum,
188 * Bind a socket to a privileged IP port
190 int bindresvport(struct socket *so, struct sockaddr *sa);
192 bindresvport(struct socket *so, struct sockaddr *sa)
195 bool_t freesa = FALSE;
196 struct sockaddr_in *sin;
198 struct sockaddr_in6 *sin6;
201 int proto, portrange, portlow;
206 error = so->so_proto->pr_usrreqs->pru_sockaddr(so, &sa);
212 memset(sa, 0, sa->sa_len);
221 portrange = IP_PORTRANGE;
222 portlow = IP_PORTRANGE_LOW;
223 sin = (struct sockaddr_in *)sa;
224 portp = &sin->sin_port;
228 proto = IPPROTO_IPV6;
229 portrange = IPV6_PORTRANGE;
230 portlow = IPV6_PORTRANGE_LOW;
231 sin6 = (struct sockaddr_in6 *)sa;
232 portp = &sin6->sin6_port;
236 return (EPFNOSUPPORT);
243 bzero(&opt, sizeof(opt));
244 opt.sopt_dir = SOPT_GET;
245 opt.sopt_level = proto;
246 opt.sopt_name = portrange;
248 opt.sopt_valsize = sizeof(old);
249 error = sogetopt(so, &opt);
253 opt.sopt_dir = SOPT_SET;
254 opt.sopt_val = &portlow;
255 error = sosetopt(so, &opt);
260 error = sobind(so, sa, curthread);
264 opt.sopt_dir = SOPT_SET;
277 * If so is NULL, then it opens a socket for the given transport
278 * provider (nconf cannot be NULL then). If the t_state is T_UNBND and
279 * bindaddr is NON-NULL, it performs a t_bind using the bindaddr. For
280 * NULL bindadr and Connection oriented transports, the value of qlen
283 * If sendsz or recvsz are zero, their default values are chosen.
288 struct socket *so, /* Connection end point */
289 const struct netconfig *nconf, /* Netconfig struct for nettoken */
290 const struct t_bind *bindaddr, /* Local bind address */
291 size_t sendsz, /* Max sendsize */
292 size_t recvsz) /* Max recvsize */
294 SVCXPRT *xprt = NULL; /* service handle */
295 bool_t madeso = FALSE; /* whether so opened here */
296 struct __rpc_sockinfo si;
297 struct sockaddr_storage ss;
301 printf("svc_tli_create: invalid netconfig\n");
304 so = __rpc_nconf2socket(nconf);
307 "svc_tli_create: could not open connection for %s\n",
311 __rpc_nconf2sockinfo(nconf, &si);
315 * It is an open socket. Get the transport info.
317 if (!__rpc_socket2sockinfo(so, &si)) {
319 "svc_tli_create: could not get transport information\n");
325 * If the socket is unbound, try to bind it.
327 if (madeso || !__rpc_sockisbound(so)) {
328 if (bindaddr == NULL) {
329 if (bindresvport(so, NULL)) {
330 memset(&ss, 0, sizeof ss);
331 ss.ss_family = si.si_af;
332 ss.ss_len = si.si_alen;
333 if (sobind(so, (struct sockaddr *)&ss,
336 "svc_tli_create: could not bind to anonymous port\n");
340 solisten(so, SOMAXCONN, curthread);
343 (struct sockaddr *)bindaddr->addr.buf)) {
345 "svc_tli_create: could not bind to requested address\n");
348 solisten(so, (int)bindaddr->qlen, curthread);
353 * call transport specific function.
355 switch (si.si_socktype) {
359 if (_getpeername(fd, (struct sockaddr *)(void *)&ss, &slen)
361 /* accepted socket */
362 xprt = svc_fd_create(fd, sendsz, recvsz);
365 xprt = svc_vc_create(pool, so, sendsz, recvsz);
370 if (strcmp(nconf->nc_protofmly, "inet") == 0 ||
371 strcmp(nconf->nc_protofmly, "inet6") == 0)
372 (void) __svc_vc_setflag(xprt, TRUE);
376 xprt = svc_dg_create(pool, so, sendsz, recvsz);
379 printf("svc_tli_create: bad service type");
385 * The error messages here are spitted out by the lower layers:
386 * svc_vc_create(), svc_fd_create() and svc_dg_create().
390 /* Fill in type of service */
391 xprt->xp_type = __rpc_socktype2seman(si.si_socktype);
394 xprt->xp_netid = strdup(nconf->nc_netid, M_RPC);
402 if (!madeso) /* so that svc_destroy doesnt close fd */
403 xprt->xp_socket = NULL;