2 * Copyright (c) 1997 Brian Somers <brian@Awfulhak.org>
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * $FreeBSD: src/usr.sbin/ppp/server.c,v 1.28.2.6 2002/09/01 02:12:32 brian Exp $
27 * $DragonFly: src/usr.sbin/ppp/server.c,v 1.2 2003/06/17 04:30:01 dillon Exp $
30 #include <sys/param.h>
32 #include <sys/socket.h>
33 #include <netinet/in.h>
45 #include "descriptor.h"
52 server_UpdateSet(struct fdescriptor *d, fd_set *r, fd_set *w, fd_set *e, int *n)
54 struct server *s = descriptor2server(d);
59 if (r && s->fd >= 0) {
63 log_Printf(LogTIMER, "server: fdset(r) %d\n", s->fd);
67 for (p = log_PromptList(); p; p = p->next)
68 sets += descriptor_UpdateSet(&p->desc, r, w, e, n);
74 server_IsSet(struct fdescriptor *d, const fd_set *fdset)
76 struct server *s = descriptor2server(d);
79 if (s->fd >= 0 && FD_ISSET(s->fd, fdset))
82 for (p = log_PromptList(); p; p = p->next)
83 if (descriptor_IsSet(&p->desc, fdset))
90 server_Read(struct fdescriptor *d, struct bundle *bundle, const fd_set *fdset)
92 struct server *s = descriptor2server(d);
93 struct sockaddr_storage ss;
94 struct sockaddr *sa = (struct sockaddr *)&ss;
95 struct sockaddr_in *sin = (struct sockaddr_in *)&ss;
97 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)&ss;
99 int ssize = sizeof ss, wfd;
103 if (s->fd >= 0 && FD_ISSET(s->fd, fdset)) {
104 wfd = accept(s->fd, sa, &ssize);
106 log_Printf(LogERROR, "server_Read: accept(): %s\n", strerror(errno));
107 else if (sa->sa_len == 0) {
115 switch (sa->sa_family) {
117 log_Printf(LogPHASE, "Connected to local client.\n");
121 ncpaddr_setsa(&addr, sa);
122 if (ntohs(sin->sin_port) < 1024) {
123 log_Printf(LogALERT, "Rejected client connection from %s:%u"
124 "(invalid port number) !\n",
125 ncpaddr_ntoa(&addr), ntohs(sin->sin_port));
130 log_Printf(LogPHASE, "Connected to client from %s:%u\n",
131 ncpaddr_ntoa(&addr), ntohs(sin->sin_port));
136 ncpaddr_setsa(&addr, sa);
137 if (ntohs(sin6->sin6_port) < 1024) {
138 log_Printf(LogALERT, "Rejected client connection from %s:%u"
139 "(invalid port number) !\n",
140 ncpaddr_ntoa(&addr), ntohs(sin6->sin6_port));
145 log_Printf(LogPHASE, "Connected to client from %s:%u\n",
146 ncpaddr_ntoa(&addr), ntohs(sin6->sin6_port));
151 write(wfd, "Unrecognised access !\n", 22);
158 if ((p = prompt_Create(s, bundle, wfd)) == NULL) {
159 write(wfd, "Connection refused.\n", 20);
162 switch (sa->sa_family) {
164 p->src.type = "local";
165 strncpy(p->src.from, s->cfg.sockname, sizeof p->src.from - 1);
166 p->src.from[sizeof p->src.from - 1] = '\0';
170 snprintf(p->src.from, sizeof p->src.from, "%s:%u",
171 ncpaddr_ntoa(&addr), ntohs(sin->sin_port));
176 snprintf(p->src.from, sizeof p->src.from, "%s:%u",
177 ncpaddr_ntoa(&addr), ntohs(sin6->sin6_port));
181 prompt_TtyCommandMode(p);
186 log_PromptListChanged = 0;
187 for (p = log_PromptList(); p; p = p->next)
188 if (descriptor_IsSet(&p->desc, fdset)) {
189 descriptor_Read(&p->desc, bundle, fdset);
190 if (log_PromptListChanged)
196 server_Write(struct fdescriptor *d __unused, struct bundle *bundle __unused, const fd_set *fdset __unused)
198 /* We never want to write here ! */
199 log_Printf(LogALERT, "server_Write: Internal error: Bad call !\n");
203 struct server server = {
216 server_Reopen(struct bundle *bundle)
218 char name[sizeof server.cfg.sockname];
222 enum server_stat ret;
224 if (server.cfg.sockname[0] != '\0') {
225 strcpy(name, server.cfg.sockname);
226 mask = server.cfg.mask;
227 server_Close(bundle);
228 if (server.cfg.sockname[0] != '\0' && stat(server.cfg.sockname, &st) == 0)
229 if (!(st.st_mode & S_IFSOCK) || unlink(server.cfg.sockname) != 0)
230 return SERVER_FAILED;
231 ret = server_LocalOpen(bundle, name, mask);
232 } else if (server.cfg.port != 0) {
233 port = server.cfg.port;
234 server_Close(bundle);
235 ret = server_TcpOpen(bundle, port);
243 server_LocalOpen(struct bundle *bundle, const char *name, mode_t mask)
245 struct sockaddr_un ifsun;
249 oldmask = (mode_t)-1; /* Silence compiler */
251 if (server.cfg.sockname && !strcmp(server.cfg.sockname, name))
252 server_Close(bundle);
254 memset(&ifsun, '\0', sizeof ifsun);
255 ifsun.sun_len = strlen(name);
256 if (ifsun.sun_len > sizeof ifsun.sun_path - 1) {
257 log_Printf(LogERROR, "Local: %s: Path too long\n", name);
258 return SERVER_INVALID;
260 ifsun.sun_family = AF_LOCAL;
261 strcpy(ifsun.sun_path, name);
263 s = socket(PF_LOCAL, SOCK_STREAM, 0);
265 log_Printf(LogERROR, "Local: socket: %s\n", strerror(errno));
268 setsockopt(s, SOL_SOCKET, SO_REUSEADDR, &s, sizeof s);
269 if (mask != (mode_t)-1)
270 oldmask = umask(mask);
271 if (bind(s, (struct sockaddr *)&ifsun, sizeof ifsun) < 0) {
272 if (mask != (mode_t)-1)
274 log_Printf(LogWARN, "Local: bind: %s\n", strerror(errno));
278 if (mask != (mode_t)-1)
280 if (listen(s, 5) != 0) {
281 log_Printf(LogERROR, "Local: Unable to listen to socket -"
282 " BUNDLE overload?\n");
287 server_Close(bundle);
290 strncpy(server.cfg.sockname, ifsun.sun_path, sizeof server.cfg.sockname - 1);
291 server.cfg.sockname[sizeof server.cfg.sockname - 1] = '\0';
292 server.cfg.mask = mask;
293 log_Printf(LogPHASE, "Listening at local socket %s.\n", name);
298 if (server.fd == -1) {
301 strncpy(server.cfg.sockname, ifsun.sun_path,
302 sizeof server.cfg.sockname - 1);
303 server.cfg.sockname[sizeof server.cfg.sockname - 1] = '\0';
304 server.cfg.mask = mask;
306 return SERVER_FAILED;
310 server_TcpOpen(struct bundle *bundle, u_short port)
312 struct sockaddr_storage ss;
313 struct sockaddr_in *sin = (struct sockaddr_in *)&ss;
315 struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)&ss;
319 if (server.cfg.port == port)
320 server_Close(bundle);
323 return SERVER_INVALID;
325 memset(&ss, '\0', sizeof ss);
327 if (probe.ipv6_available) {
328 sin6->sin6_family = AF_INET6;
329 sin6->sin6_port = htons(port);
330 sin6->sin6_len = (u_int8_t)sizeof ss;
332 s = socket(PF_INET6, SOCK_STREAM, 0);
336 sin->sin_family = AF_INET;
337 sin->sin_port = htons(port);
338 sin->sin_len = (u_int8_t)sizeof ss;
339 sin->sin_addr.s_addr = INADDR_ANY;
341 s = socket(PF_INET, SOCK_STREAM, 0);
345 log_Printf(LogERROR, "Tcp: socket: %s\n", strerror(errno));
349 setsockopt(s, SOL_SOCKET, SO_REUSEADDR, &s, sizeof s);
350 if (bind(s, (struct sockaddr *)&ss, sz) < 0) {
351 log_Printf(LogWARN, "Tcp: bind: %s\n", strerror(errno));
355 if (listen(s, 5) != 0) {
356 log_Printf(LogERROR, "Tcp: Unable to listen to socket: %s\n",
361 server_Close(bundle);
363 server.cfg.port = port;
364 *server.cfg.sockname = '\0';
366 log_Printf(LogPHASE, "Listening at port %d.\n", port);
370 if (server.fd == -1) {
372 server.cfg.port = port;
373 *server.cfg.sockname = '\0';
376 return SERVER_FAILED;
380 server_Close(struct bundle *bundle __unused)
382 if (server.fd >= 0) {
383 if (*server.cfg.sockname != '\0') {
384 struct sockaddr_un un;
387 if (getsockname(server.fd, (struct sockaddr *)&un, &sz) == 0 &&
388 un.sun_family == AF_LOCAL && sz == sizeof un)
393 /* Drop associated prompts */
394 log_DestroyPrompts(&server);
403 server_Clear(struct bundle *bundle)
407 ret = server_Close(bundle);
411 *server.cfg.sockname = '\0';