3006ec67fe
This is a type of physical link that can chat and talk LCP & CCP. A bundle contains a list of these (only one in the list for the moment). The datalink is a type of descriptor, and dials, enters LCP (& does CCP), kicks the bundle when its FSMs do something interesting and does the hangup chat script on the way down. It also handles redials and reconnects. There are lots of loose ends, and probably lots of bugs, but the data structures are getting there !
272 lines
7.0 KiB
C
272 lines
7.0 KiB
C
/*-
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* Copyright (c) 1997 Brian Somers <brian@Awfulhak.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $Id: server.c,v 1.16.2.5 1998/02/13 05:10:24 brian Exp $
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*/
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#include <sys/param.h>
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <arpa/inet.h>
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#include <netinet/in_systm.h>
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#include <errno.h>
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#include <stdio.h>
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#include <string.h>
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#include <sys/stat.h>
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#include <sys/un.h>
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#include <termios.h>
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#include <unistd.h>
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#include "command.h"
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#include "mbuf.h"
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#include "log.h"
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#include "loadalias.h"
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#include "defs.h"
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#include "vars.h"
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#include "descriptor.h"
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#include "server.h"
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#include "id.h"
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#include "prompt.h"
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#include "timer.h"
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#include "auth.h"
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static int
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server_UpdateSet(struct descriptor *d, fd_set *r, fd_set *w, fd_set *e, int *n)
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{
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struct server *s = descriptor2server(d);
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LogPrintf(LogDEBUG, "descriptor2server; %p -> %p\n", d, s);
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if (r && s->fd >= 0) {
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if (*n < s->fd + 1)
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*n = s->fd + 1;
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FD_SET(s->fd, r);
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return 1;
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}
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return 0;
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}
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static int
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server_IsSet(struct descriptor *d, fd_set *fdset)
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{
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struct server *s = descriptor2server(d);
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LogPrintf(LogDEBUG, "descriptor2server; %p -> %p\n", d, s);
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return s->fd >= 0 && FD_ISSET(s->fd, fdset);
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}
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#define IN_SIZE sizeof(struct sockaddr_in)
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#define UN_SIZE sizeof(struct sockaddr_in)
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#define ADDRSZ (IN_SIZE > UN_SIZE ? IN_SIZE : UN_SIZE)
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static void
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server_Read(struct descriptor *d, struct bundle *bundle, const fd_set *fdset)
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{
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struct server *s = descriptor2server(d);
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char hisaddr[ADDRSZ];
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struct sockaddr *sa = (struct sockaddr *)hisaddr;
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struct sockaddr_in *sin = (struct sockaddr_in *)hisaddr;
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int ssize = ADDRSZ, wfd;
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LogPrintf(LogDEBUG, "descriptor2server; %p -> %p\n", d, s);
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wfd = accept(s->fd, sa, &ssize);
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if (wfd < 0) {
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LogPrintf(LogERROR, "server_Read: accept(): %s\n", strerror(errno));
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return;
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}
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switch (sa->sa_family) {
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case AF_LOCAL:
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LogPrintf(LogPHASE, "Connected to local client.\n");
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break;
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case AF_INET:
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if (ntohs(sin->sin_port) < 1024) {
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LogPrintf(LogALERT, "Rejected client connection from %s:%u"
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"(invalid port number) !\n",
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inet_ntoa(sin->sin_addr), ntohs(sin->sin_port));
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close(wfd);
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return;
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}
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LogPrintf(LogPHASE, "Connected to client from %s:%u\n",
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inet_ntoa(sin->sin_addr), sin->sin_port);
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break;
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default:
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write(wfd, "Unrecognised access !\n", 22);
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close(wfd);
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return;
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}
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if (!prompt_Init(&prompt, wfd)) {
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write(wfd, "Connection already in use.\n", 27);
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close(wfd);
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} else {
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LocalAuthInit();
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IsInteractive(1);
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prompt_Display(&prompt, bundle);
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}
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}
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static void
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server_Write(struct descriptor *d, const fd_set *fdset)
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{
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/* We never want to write here ! */
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LogPrintf(LogERROR, "server_Write: Internal error: Bad call !\n");
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}
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struct server server = {
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{
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SERVER_DESCRIPTOR,
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NULL,
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server_UpdateSet,
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server_IsSet,
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server_Read,
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server_Write
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},
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-1
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};
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static struct sockaddr_un ifsun;
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static char *rm;
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int
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ServerLocalOpen(const char *name, mode_t mask)
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{
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int s;
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if (VarLocalAuth == LOCAL_DENY) {
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LogPrintf(LogERROR, "Local: Can't open socket %s: No password "
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"in ppp.secret\n", name);
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return 1;
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}
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if (mode & MODE_INTER) {
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LogPrintf(LogERROR, "Local: Can't open socket in interactive mode\n");
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return 1;
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}
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memset(&ifsun, '\0', sizeof ifsun);
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ifsun.sun_len = strlen(name);
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if (ifsun.sun_len > sizeof ifsun.sun_path - 1) {
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LogPrintf(LogERROR, "Local: %s: Path too long\n", name);
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return 2;
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}
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ifsun.sun_family = AF_LOCAL;
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strcpy(ifsun.sun_path, name);
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s = ID0socket(PF_LOCAL, SOCK_STREAM, 0);
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if (s < 0) {
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LogPrintf(LogERROR, "Local: socket: %s\n", strerror(errno));
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return 3;
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}
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setsockopt(s, SOL_SOCKET, SO_REUSEADDR, &s, sizeof s);
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if (mask != (mode_t)-1)
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mask = umask(mask);
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if (bind(s, (struct sockaddr *)&ifsun, sizeof ifsun) < 0) {
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if (mask != (mode_t)-1)
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umask(mask);
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LogPrintf(LogERROR, "Local: bind: %s\n", strerror(errno));
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if (errno == EADDRINUSE)
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prompt_Printf(&prompt, "Wait for a while, then try again.\n");
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close(s);
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return 4;
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}
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if (mask != (mode_t)-1)
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umask(mask);
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if (listen(s, 5) != 0) {
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LogPrintf(LogERROR, "Local: Unable to listen to socket - BUNDLE overload?\n");
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close(s);
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ID0unlink(name);
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return 5;
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}
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ServerClose();
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server.fd = s;
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rm = ifsun.sun_path;
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LogPrintf(LogPHASE, "Listening at local socket %s.\n", name);
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return 0;
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}
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int
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ServerTcpOpen(int port)
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{
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struct sockaddr_in ifsin;
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int s;
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if (VarLocalAuth == LOCAL_DENY) {
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LogPrintf(LogERROR, "Tcp: Can't open socket %d: No password "
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"in ppp.secret\n", port);
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return 6;
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}
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if (mode & MODE_INTER) {
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LogPrintf(LogERROR, "Tcp: Can't open socket in interactive mode\n");
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return 6;
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}
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s = ID0socket(PF_INET, SOCK_STREAM, 0);
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if (s < 0) {
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LogPrintf(LogERROR, "Tcp: socket: %s\n", strerror(errno));
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return 7;
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}
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memset(&ifsin, '\0', sizeof ifsin);
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ifsin.sin_family = AF_INET;
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ifsin.sin_addr.s_addr = INADDR_ANY;
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ifsin.sin_port = htons(port);
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setsockopt(s, SOL_SOCKET, SO_REUSEADDR, &s, sizeof s);
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if (bind(s, (struct sockaddr *)&ifsin, sizeof ifsin) < 0) {
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LogPrintf(LogERROR, "Tcp: bind: %s\n", strerror(errno));
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if (errno == EADDRINUSE)
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prompt_Printf(&prompt, "Wait for a while, then try again.\n");
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close(s);
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return 8;
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}
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if (listen(s, 5) != 0) {
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LogPrintf(LogERROR, "Tcp: Unable to listen to socket - BUNDLE overload?\n");
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close(s);
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return 9;
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}
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ServerClose();
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server.fd = s;
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LogPrintf(LogPHASE, "Listening at port %d.\n", port);
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return 0;
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}
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int
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ServerClose()
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{
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if (server.fd >= 0) {
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close(server.fd);
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if (rm) {
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ID0unlink(rm);
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rm = 0;
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}
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server.fd = -1;
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return 1;
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}
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return 0;
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}
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