1/* $NetBSD: svc_dg.c,v 1.4 2000/07/06 03:10:35 christos Exp $ */
2
3/*
4 * Sun RPC is a product of Sun Microsystems, Inc. and is provided for
5 * unrestricted use provided that this legend is included on all tape
6 * media and as a part of the software program in whole or part. Users
7 * may copy or modify Sun RPC without charge, but are not authorized
8 * to license or distribute it to anyone else except as part of a product or
9 * program developed by the user.
10 *
11 * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
12 * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
13 * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
14 *
15 * Sun RPC is provided with no support and without any obligation on the
16 * part of Sun Microsystems, Inc. to assist in its use, correction,
17 * modification or enhancement.
18 *
19 * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
20 * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
21 * OR ANY PART THEREOF.
22 *
23 * In no event will Sun Microsystems, Inc. be liable for any lost revenue
24 * or profits or other special, indirect and consequential damages, even if
25 * Sun has been advised of the possibility of such damages.
26 *
27 * Sun Microsystems, Inc.
28 * 2550 Garcia Avenue
29 * Mountain View, California 94043
30 */
31
32/*
33 * Copyright (c) 1986-1991 by Sun Microsystems Inc.
34 */
35
36#if defined(LIBC_SCCS) && !defined(lint)
37#ident "@(#)svc_dg.c 1.17 94/04/24 SMI"
38#endif
39#include <sys/cdefs.h>
| 1/* $NetBSD: svc_dg.c,v 1.4 2000/07/06 03:10:35 christos Exp $ */
2
3/*
4 * Sun RPC is a product of Sun Microsystems, Inc. and is provided for
5 * unrestricted use provided that this legend is included on all tape
6 * media and as a part of the software program in whole or part. Users
7 * may copy or modify Sun RPC without charge, but are not authorized
8 * to license or distribute it to anyone else except as part of a product or
9 * program developed by the user.
10 *
11 * SUN RPC IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING THE
12 * WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR
13 * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE.
14 *
15 * Sun RPC is provided with no support and without any obligation on the
16 * part of Sun Microsystems, Inc. to assist in its use, correction,
17 * modification or enhancement.
18 *
19 * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE
20 * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY SUN RPC
21 * OR ANY PART THEREOF.
22 *
23 * In no event will Sun Microsystems, Inc. be liable for any lost revenue
24 * or profits or other special, indirect and consequential damages, even if
25 * Sun has been advised of the possibility of such damages.
26 *
27 * Sun Microsystems, Inc.
28 * 2550 Garcia Avenue
29 * Mountain View, California 94043
30 */
31
32/*
33 * Copyright (c) 1986-1991 by Sun Microsystems Inc.
34 */
35
36#if defined(LIBC_SCCS) && !defined(lint)
37#ident "@(#)svc_dg.c 1.17 94/04/24 SMI"
38#endif
39#include <sys/cdefs.h>
|
41
42/*
43 * svc_dg.c, Server side for connectionless RPC.
44 */
45
46#include <sys/param.h>
47#include <sys/lock.h>
48#include <sys/kernel.h>
49#include <sys/malloc.h>
50#include <sys/mbuf.h>
51#include <sys/mutex.h>
52#include <sys/protosw.h>
53#include <sys/queue.h>
54#include <sys/socket.h>
55#include <sys/socketvar.h>
56#include <sys/sx.h>
57#include <sys/systm.h>
58#include <sys/uio.h>
59
60#include <net/vnet.h>
61
62#include <rpc/rpc.h>
63
64#include <rpc/rpc_com.h>
65
66static enum xprt_stat svc_dg_stat(SVCXPRT *);
67static bool_t svc_dg_recv(SVCXPRT *, struct rpc_msg *,
68 struct sockaddr **, struct mbuf **);
69static bool_t svc_dg_reply(SVCXPRT *, struct rpc_msg *,
70 struct sockaddr *, struct mbuf *);
71static void svc_dg_destroy(SVCXPRT *);
72static bool_t svc_dg_control(SVCXPRT *, const u_int, void *);
73static int svc_dg_soupcall(struct socket *so, void *arg, int waitflag);
74
75static struct xp_ops svc_dg_ops = {
76 .xp_recv = svc_dg_recv,
77 .xp_stat = svc_dg_stat,
78 .xp_reply = svc_dg_reply,
79 .xp_destroy = svc_dg_destroy,
80 .xp_control = svc_dg_control,
81};
82
83/*
84 * Usage:
85 * xprt = svc_dg_create(sock, sendsize, recvsize);
86 * Does other connectionless specific initializations.
87 * Once *xprt is initialized, it is registered.
88 * see (svc.h, xprt_register). If recvsize or sendsize are 0 suitable
89 * system defaults are chosen.
90 * The routines returns NULL if a problem occurred.
91 */
92static const char svc_dg_str[] = "svc_dg_create: %s";
93static const char svc_dg_err1[] = "could not get transport information";
94static const char svc_dg_err2[] = "transport does not support data transfer";
95static const char __no_mem_str[] = "out of memory";
96
97SVCXPRT *
98svc_dg_create(SVCPOOL *pool, struct socket *so, size_t sendsize,
99 size_t recvsize)
100{
101 SVCXPRT *xprt;
102 struct __rpc_sockinfo si;
103 struct sockaddr* sa;
104 int error;
105
106 if (!__rpc_socket2sockinfo(so, &si)) {
107 printf(svc_dg_str, svc_dg_err1);
108 return (NULL);
109 }
110 /*
111 * Find the receive and the send size
112 */
113 sendsize = __rpc_get_t_size(si.si_af, si.si_proto, (int)sendsize);
114 recvsize = __rpc_get_t_size(si.si_af, si.si_proto, (int)recvsize);
115 if ((sendsize == 0) || (recvsize == 0)) {
116 printf(svc_dg_str, svc_dg_err2);
117 return (NULL);
118 }
119
120 xprt = svc_xprt_alloc();
121 sx_init(&xprt->xp_lock, "xprt->xp_lock");
122 xprt->xp_pool = pool;
123 xprt->xp_socket = so;
124 xprt->xp_p1 = NULL;
125 xprt->xp_p2 = NULL;
126 xprt->xp_ops = &svc_dg_ops;
127
128 CURVNET_SET(so->so_vnet);
129 error = so->so_proto->pr_usrreqs->pru_sockaddr(so, &sa);
130 CURVNET_RESTORE();
131 if (error)
132 goto freedata;
133
134 memcpy(&xprt->xp_ltaddr, sa, sa->sa_len);
135 free(sa, M_SONAME);
136
137 xprt_register(xprt);
138
139 SOCKBUF_LOCK(&so->so_rcv);
140 soupcall_set(so, SO_RCV, svc_dg_soupcall, xprt);
141 SOCKBUF_UNLOCK(&so->so_rcv);
142
143 return (xprt);
144freedata:
145 (void) printf(svc_dg_str, __no_mem_str);
146 if (xprt) {
147 svc_xprt_free(xprt);
148 }
149 return (NULL);
150}
151
152/*ARGSUSED*/
153static enum xprt_stat
154svc_dg_stat(SVCXPRT *xprt)
155{
156
157 if (soreadable(xprt->xp_socket))
158 return (XPRT_MOREREQS);
159
160 return (XPRT_IDLE);
161}
162
163static bool_t
164svc_dg_recv(SVCXPRT *xprt, struct rpc_msg *msg,
165 struct sockaddr **addrp, struct mbuf **mp)
166{
167 struct uio uio;
168 struct sockaddr *raddr;
169 struct mbuf *mreq;
170 XDR xdrs;
171 int error, rcvflag;
172
173 /*
174 * Serialise access to the socket.
175 */
176 sx_xlock(&xprt->xp_lock);
177
178 /*
179 * The socket upcall calls xprt_active() which will eventually
180 * cause the server to call us here. We attempt to read a
181 * packet from the socket and process it. If the read fails,
182 * we have drained all pending requests so we call
183 * xprt_inactive().
184 */
185 uio.uio_resid = 1000000000;
186 uio.uio_td = curthread;
187 mreq = NULL;
188 rcvflag = MSG_DONTWAIT;
189 error = soreceive(xprt->xp_socket, &raddr, &uio, &mreq, NULL, &rcvflag);
190
191 if (error == EWOULDBLOCK) {
192 /*
193 * We must re-test for readability after taking the
194 * lock to protect us in the case where a new packet
195 * arrives on the socket after our call to soreceive
196 * fails with EWOULDBLOCK. The pool lock protects us
197 * from racing the upcall after our soreadable() call
198 * returns false.
199 */
200 mtx_lock(&xprt->xp_pool->sp_lock);
201 if (!soreadable(xprt->xp_socket))
202 xprt_inactive_locked(xprt);
203 mtx_unlock(&xprt->xp_pool->sp_lock);
204 sx_xunlock(&xprt->xp_lock);
205 return (FALSE);
206 }
207
208 if (error) {
209 SOCKBUF_LOCK(&xprt->xp_socket->so_rcv);
210 soupcall_clear(xprt->xp_socket, SO_RCV);
211 SOCKBUF_UNLOCK(&xprt->xp_socket->so_rcv);
212 xprt_inactive(xprt);
213 sx_xunlock(&xprt->xp_lock);
214 return (FALSE);
215 }
216
217 sx_xunlock(&xprt->xp_lock);
218
219 xdrmbuf_create(&xdrs, mreq, XDR_DECODE);
220 if (! xdr_callmsg(&xdrs, msg)) {
221 XDR_DESTROY(&xdrs);
222 return (FALSE);
223 }
224
225 *addrp = raddr;
226 *mp = xdrmbuf_getall(&xdrs);
227 XDR_DESTROY(&xdrs);
228
229 return (TRUE);
230}
231
232static bool_t
233svc_dg_reply(SVCXPRT *xprt, struct rpc_msg *msg,
234 struct sockaddr *addr, struct mbuf *m)
235{
236 XDR xdrs;
237 struct mbuf *mrep;
238 bool_t stat = TRUE;
239 int error;
240
| 41
42/*
43 * svc_dg.c, Server side for connectionless RPC.
44 */
45
46#include <sys/param.h>
47#include <sys/lock.h>
48#include <sys/kernel.h>
49#include <sys/malloc.h>
50#include <sys/mbuf.h>
51#include <sys/mutex.h>
52#include <sys/protosw.h>
53#include <sys/queue.h>
54#include <sys/socket.h>
55#include <sys/socketvar.h>
56#include <sys/sx.h>
57#include <sys/systm.h>
58#include <sys/uio.h>
59
60#include <net/vnet.h>
61
62#include <rpc/rpc.h>
63
64#include <rpc/rpc_com.h>
65
66static enum xprt_stat svc_dg_stat(SVCXPRT *);
67static bool_t svc_dg_recv(SVCXPRT *, struct rpc_msg *,
68 struct sockaddr **, struct mbuf **);
69static bool_t svc_dg_reply(SVCXPRT *, struct rpc_msg *,
70 struct sockaddr *, struct mbuf *);
71static void svc_dg_destroy(SVCXPRT *);
72static bool_t svc_dg_control(SVCXPRT *, const u_int, void *);
73static int svc_dg_soupcall(struct socket *so, void *arg, int waitflag);
74
75static struct xp_ops svc_dg_ops = {
76 .xp_recv = svc_dg_recv,
77 .xp_stat = svc_dg_stat,
78 .xp_reply = svc_dg_reply,
79 .xp_destroy = svc_dg_destroy,
80 .xp_control = svc_dg_control,
81};
82
83/*
84 * Usage:
85 * xprt = svc_dg_create(sock, sendsize, recvsize);
86 * Does other connectionless specific initializations.
87 * Once *xprt is initialized, it is registered.
88 * see (svc.h, xprt_register). If recvsize or sendsize are 0 suitable
89 * system defaults are chosen.
90 * The routines returns NULL if a problem occurred.
91 */
92static const char svc_dg_str[] = "svc_dg_create: %s";
93static const char svc_dg_err1[] = "could not get transport information";
94static const char svc_dg_err2[] = "transport does not support data transfer";
95static const char __no_mem_str[] = "out of memory";
96
97SVCXPRT *
98svc_dg_create(SVCPOOL *pool, struct socket *so, size_t sendsize,
99 size_t recvsize)
100{
101 SVCXPRT *xprt;
102 struct __rpc_sockinfo si;
103 struct sockaddr* sa;
104 int error;
105
106 if (!__rpc_socket2sockinfo(so, &si)) {
107 printf(svc_dg_str, svc_dg_err1);
108 return (NULL);
109 }
110 /*
111 * Find the receive and the send size
112 */
113 sendsize = __rpc_get_t_size(si.si_af, si.si_proto, (int)sendsize);
114 recvsize = __rpc_get_t_size(si.si_af, si.si_proto, (int)recvsize);
115 if ((sendsize == 0) || (recvsize == 0)) {
116 printf(svc_dg_str, svc_dg_err2);
117 return (NULL);
118 }
119
120 xprt = svc_xprt_alloc();
121 sx_init(&xprt->xp_lock, "xprt->xp_lock");
122 xprt->xp_pool = pool;
123 xprt->xp_socket = so;
124 xprt->xp_p1 = NULL;
125 xprt->xp_p2 = NULL;
126 xprt->xp_ops = &svc_dg_ops;
127
128 CURVNET_SET(so->so_vnet);
129 error = so->so_proto->pr_usrreqs->pru_sockaddr(so, &sa);
130 CURVNET_RESTORE();
131 if (error)
132 goto freedata;
133
134 memcpy(&xprt->xp_ltaddr, sa, sa->sa_len);
135 free(sa, M_SONAME);
136
137 xprt_register(xprt);
138
139 SOCKBUF_LOCK(&so->so_rcv);
140 soupcall_set(so, SO_RCV, svc_dg_soupcall, xprt);
141 SOCKBUF_UNLOCK(&so->so_rcv);
142
143 return (xprt);
144freedata:
145 (void) printf(svc_dg_str, __no_mem_str);
146 if (xprt) {
147 svc_xprt_free(xprt);
148 }
149 return (NULL);
150}
151
152/*ARGSUSED*/
153static enum xprt_stat
154svc_dg_stat(SVCXPRT *xprt)
155{
156
157 if (soreadable(xprt->xp_socket))
158 return (XPRT_MOREREQS);
159
160 return (XPRT_IDLE);
161}
162
163static bool_t
164svc_dg_recv(SVCXPRT *xprt, struct rpc_msg *msg,
165 struct sockaddr **addrp, struct mbuf **mp)
166{
167 struct uio uio;
168 struct sockaddr *raddr;
169 struct mbuf *mreq;
170 XDR xdrs;
171 int error, rcvflag;
172
173 /*
174 * Serialise access to the socket.
175 */
176 sx_xlock(&xprt->xp_lock);
177
178 /*
179 * The socket upcall calls xprt_active() which will eventually
180 * cause the server to call us here. We attempt to read a
181 * packet from the socket and process it. If the read fails,
182 * we have drained all pending requests so we call
183 * xprt_inactive().
184 */
185 uio.uio_resid = 1000000000;
186 uio.uio_td = curthread;
187 mreq = NULL;
188 rcvflag = MSG_DONTWAIT;
189 error = soreceive(xprt->xp_socket, &raddr, &uio, &mreq, NULL, &rcvflag);
190
191 if (error == EWOULDBLOCK) {
192 /*
193 * We must re-test for readability after taking the
194 * lock to protect us in the case where a new packet
195 * arrives on the socket after our call to soreceive
196 * fails with EWOULDBLOCK. The pool lock protects us
197 * from racing the upcall after our soreadable() call
198 * returns false.
199 */
200 mtx_lock(&xprt->xp_pool->sp_lock);
201 if (!soreadable(xprt->xp_socket))
202 xprt_inactive_locked(xprt);
203 mtx_unlock(&xprt->xp_pool->sp_lock);
204 sx_xunlock(&xprt->xp_lock);
205 return (FALSE);
206 }
207
208 if (error) {
209 SOCKBUF_LOCK(&xprt->xp_socket->so_rcv);
210 soupcall_clear(xprt->xp_socket, SO_RCV);
211 SOCKBUF_UNLOCK(&xprt->xp_socket->so_rcv);
212 xprt_inactive(xprt);
213 sx_xunlock(&xprt->xp_lock);
214 return (FALSE);
215 }
216
217 sx_xunlock(&xprt->xp_lock);
218
219 xdrmbuf_create(&xdrs, mreq, XDR_DECODE);
220 if (! xdr_callmsg(&xdrs, msg)) {
221 XDR_DESTROY(&xdrs);
222 return (FALSE);
223 }
224
225 *addrp = raddr;
226 *mp = xdrmbuf_getall(&xdrs);
227 XDR_DESTROY(&xdrs);
228
229 return (TRUE);
230}
231
232static bool_t
233svc_dg_reply(SVCXPRT *xprt, struct rpc_msg *msg,
234 struct sockaddr *addr, struct mbuf *m)
235{
236 XDR xdrs;
237 struct mbuf *mrep;
238 bool_t stat = TRUE;
239 int error;
240
|
243
244 xdrmbuf_create(&xdrs, mrep, XDR_ENCODE);
245
246 if (msg->rm_reply.rp_stat == MSG_ACCEPTED &&
247 msg->rm_reply.rp_acpt.ar_stat == SUCCESS) {
248 if (!xdr_replymsg(&xdrs, msg))
249 stat = FALSE;
250 else
251 xdrmbuf_append(&xdrs, m);
252 } else {
253 stat = xdr_replymsg(&xdrs, msg);
254 }
255
256 if (stat) {
257 m_fixhdr(mrep);
258 error = sosend(xprt->xp_socket, addr, NULL, mrep, NULL,
259 0, curthread);
260 if (!error) {
261 stat = TRUE;
262 }
263 } else {
264 m_freem(mrep);
265 }
266
267 XDR_DESTROY(&xdrs);
268 xprt->xp_p2 = NULL;
269
270 return (stat);
271}
272
273static void
274svc_dg_destroy(SVCXPRT *xprt)
275{
276
277 SOCKBUF_LOCK(&xprt->xp_socket->so_rcv);
278 soupcall_clear(xprt->xp_socket, SO_RCV);
279 SOCKBUF_UNLOCK(&xprt->xp_socket->so_rcv);
280
281 sx_destroy(&xprt->xp_lock);
282 if (xprt->xp_socket)
283 (void)soclose(xprt->xp_socket);
284
285 if (xprt->xp_netid)
286 (void) mem_free(xprt->xp_netid, strlen(xprt->xp_netid) + 1);
287 svc_xprt_free(xprt);
288}
289
290static bool_t
291/*ARGSUSED*/
292svc_dg_control(xprt, rq, in)
293 SVCXPRT *xprt;
294 const u_int rq;
295 void *in;
296{
297
298 return (FALSE);
299}
300
301static int
302svc_dg_soupcall(struct socket *so, void *arg, int waitflag)
303{
304 SVCXPRT *xprt = (SVCXPRT *) arg;
305
306 xprt_active(xprt);
307 return (SU_OK);
308}
| 242
243 xdrmbuf_create(&xdrs, mrep, XDR_ENCODE);
244
245 if (msg->rm_reply.rp_stat == MSG_ACCEPTED &&
246 msg->rm_reply.rp_acpt.ar_stat == SUCCESS) {
247 if (!xdr_replymsg(&xdrs, msg))
248 stat = FALSE;
249 else
250 xdrmbuf_append(&xdrs, m);
251 } else {
252 stat = xdr_replymsg(&xdrs, msg);
253 }
254
255 if (stat) {
256 m_fixhdr(mrep);
257 error = sosend(xprt->xp_socket, addr, NULL, mrep, NULL,
258 0, curthread);
259 if (!error) {
260 stat = TRUE;
261 }
262 } else {
263 m_freem(mrep);
264 }
265
266 XDR_DESTROY(&xdrs);
267 xprt->xp_p2 = NULL;
268
269 return (stat);
270}
271
272static void
273svc_dg_destroy(SVCXPRT *xprt)
274{
275
276 SOCKBUF_LOCK(&xprt->xp_socket->so_rcv);
277 soupcall_clear(xprt->xp_socket, SO_RCV);
278 SOCKBUF_UNLOCK(&xprt->xp_socket->so_rcv);
279
280 sx_destroy(&xprt->xp_lock);
281 if (xprt->xp_socket)
282 (void)soclose(xprt->xp_socket);
283
284 if (xprt->xp_netid)
285 (void) mem_free(xprt->xp_netid, strlen(xprt->xp_netid) + 1);
286 svc_xprt_free(xprt);
287}
288
289static bool_t
290/*ARGSUSED*/
291svc_dg_control(xprt, rq, in)
292 SVCXPRT *xprt;
293 const u_int rq;
294 void *in;
295{
296
297 return (FALSE);
298}
299
300static int
301svc_dg_soupcall(struct socket *so, void *arg, int waitflag)
302{
303 SVCXPRT *xprt = (SVCXPRT *) arg;
304
305 xprt_active(xprt);
306 return (SU_OK);
307}
|