1fa665f5b3
o Create struct mpserver as part of struct mp. mpserver creates a unix-domain socket based on the peers auth name and endpoint discriminator. If it already exists, ppp will ``pass the link'' over to the owner of the socket, joining it into the bundle of another ppp invocation, otherwise ppp waits for other invocations to pass it links through this socket. The final piece of code will be the code that flattens our datalink info and passes it down this channel (not yet implemented).
273 lines
7.2 KiB
C
273 lines
7.2 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 1.16.2.16 1998/04/18 01:01:28 brian Exp $
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*/
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#include <sys/types.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 <netinet/ip.h>
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#include <sys/un.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 <termios.h>
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#include <unistd.h>
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#include "mbuf.h"
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#include "log.h"
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#include "defs.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 "lqr.h"
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#include "hdlc.h"
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#include "fsm.h"
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#include "lcp.h"
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#include "ccp.h"
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#include "throughput.h"
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#include "link.h"
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#include "mp.h"
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#include "iplist.h"
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#include "slcompress.h"
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#include "ipcp.h"
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#include "filter.h"
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#include "bundle.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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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, const fd_set *fdset)
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{
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struct server *s = descriptor2server(d);
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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 *in = (struct sockaddr_in *)hisaddr;
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int ssize = ADDRSZ, wfd;
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struct prompt *p;
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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(in->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(in->sin_addr), ntohs(in->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(in->sin_addr), in->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 ((p = prompt_Create(s, bundle, wfd)) == NULL) {
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write(wfd, "Connection refused.\n", 20);
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close(wfd);
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} else {
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switch (sa->sa_family) {
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case AF_LOCAL:
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p->src.type = "local";
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strncpy(p->src.from, s->rm, sizeof p->src.from - 1);
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p->src.from[sizeof p->src.from - 1] = '\0';
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break;
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case AF_INET:
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p->src.type = "tcp";
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snprintf(p->src.from, sizeof p->src.from, "%s:%u",
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inet_ntoa(in->sin_addr), in->sin_port);
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break;
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}
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prompt_TtyCommandMode(p);
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prompt_Required(p);
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}
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}
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static void
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server_Write(struct descriptor *d, struct bundle *bundle, 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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int
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ServerLocalOpen(struct bundle *bundle, const char *name, mode_t mask)
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{
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int s;
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if (server.rm && !strcmp(server.rm, name)) {
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if (chmod(server.rm, mask))
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LogPrintf(LogERROR, "Local: chmod: %s\n", strerror(errno));
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return 0;
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}
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memset(&server.ifsun, '\0', sizeof server.ifsun);
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server.ifsun.sun_len = strlen(name);
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if (server.ifsun.sun_len > sizeof server.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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server.ifsun.sun_family = AF_LOCAL;
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strcpy(server.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 *)&server.ifsun, sizeof server.ifsun) < 0) {
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if (mask != (mode_t)-1)
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umask(mask);
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LogPrintf(LogWARN, "Local: bind: %s\n", strerror(errno));
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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(bundle);
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server.fd = s;
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server.rm = server.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(struct bundle *bundle, 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 (server.port == port)
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return 0;
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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(LogWARN, "Tcp: bind: %s\n", strerror(errno));
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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(bundle);
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server.fd = s;
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server.port = port;
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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(struct bundle *bundle)
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{
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if (server.fd >= 0) {
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close(server.fd);
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if (server.rm) {
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ID0unlink(server.rm);
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server.rm = NULL;
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}
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server.fd = -1;
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server.port = 0;
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/* Drop associated prompts */
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bundle_DelPromptDescriptors(bundle, &server);
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return 1;
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}
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return 0;
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}
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