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213 lines
5.6 KiB
C
213 lines
5.6 KiB
C
/*-
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* Copyright (c) 1999 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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* $FreeBSD$
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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 <netdb.h>
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#include <errno.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/stat.h>
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#include <sys/uio.h>
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#include <termios.h>
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#include <unistd.h>
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#include "layer.h"
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#include "defs.h"
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#include "mbuf.h"
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#include "log.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 "throughput.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 "link.h"
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#include "async.h"
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#include "descriptor.h"
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#include "physical.h"
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#include "tcp.h"
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static int
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tcp_OpenConnection(const char *name, char *host, char *port)
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{
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struct sockaddr_in dest;
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int sock;
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struct servent *sp;
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dest.sin_family = AF_INET;
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dest.sin_addr = GetIpAddr(host);
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if (dest.sin_addr.s_addr == INADDR_NONE) {
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log_Printf(LogWARN, "%s: %s: unknown host\n", name, host);
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return -2;
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}
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dest.sin_port = htons(atoi(port));
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if (dest.sin_port == 0) {
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sp = getservbyname(port, "tcp");
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if (sp)
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dest.sin_port = sp->s_port;
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else {
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log_Printf(LogWARN, "%s: %s: unknown service\n", name, port);
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return -2;
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}
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}
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log_Printf(LogPHASE, "%s: Connecting to %s:%s/tcp\n", name, host, port);
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sock = socket(PF_INET, SOCK_STREAM, 0);
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if (sock < 0)
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return -2;
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if (connect(sock, (struct sockaddr *)&dest, sizeof dest) < 0) {
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log_Printf(LogWARN, "%s: connect: %s\n", name, strerror(errno));
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close(sock);
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return -2;
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}
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return sock;
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}
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static struct device tcpdevice = {
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TCP_DEVICE,
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"tcp",
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0,
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{ CD_NOTREQUIRED, 0 },
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL
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};
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struct device *
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tcp_iov2device(int type, struct physical *p, struct iovec *iov,
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int *niov, int maxiov __unused, int *auxfd __unused,
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int *nauxfd __unused)
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{
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if (type == TCP_DEVICE) {
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free(iov[(*niov)++].iov_base);
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physical_SetupStack(p, tcpdevice.name, PHYSICAL_FORCE_ASYNC);
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return &tcpdevice;
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}
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return NULL;
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}
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struct device *
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tcp_Create(struct physical *p)
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{
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char *cp, *host, *port, *svc;
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if (p->fd < 0) {
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if ((cp = strchr(p->name.full, ':')) != NULL && !strchr(cp + 1, ':')) {
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*cp = '\0';
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host = p->name.full;
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port = cp + 1;
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svc = strchr(port, '/');
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if (svc && strcasecmp(svc, "/tcp")) {
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*cp = ':';
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return 0;
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}
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if (svc) {
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p->fd--; /* We own the device but maybe can't use it - change fd */
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*svc = '\0';
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}
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if (*host && *port) {
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p->fd = tcp_OpenConnection(p->link.name, host, port);
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*cp = ':';
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if (svc)
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*svc = '/';
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if (p->fd >= 0)
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log_Printf(LogDEBUG, "%s: Opened tcp socket %s\n", p->link.name,
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p->name.full);
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} else {
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if (svc)
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*svc = '/';
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*cp = ':';
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}
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}
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}
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if (p->fd >= 0) {
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/* See if we're a tcp socket */
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struct stat st;
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if (fstat(p->fd, &st) != -1 && (st.st_mode & S_IFSOCK)) {
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int type, sz;
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sz = sizeof type;
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if (getsockopt(p->fd, SOL_SOCKET, SO_TYPE, &type, &sz) == -1) {
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log_Printf(LogPHASE, "%s: Link is a closed socket !\n", p->link.name);
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close(p->fd);
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p->fd = -1;
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return NULL;
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}
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if (sz == sizeof type && type == SOCK_STREAM) {
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struct sockaddr_in sock;
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struct sockaddr *sockp = (struct sockaddr *)&sock;
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if (*p->name.full == '\0') {
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sz = sizeof sock;
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if (getpeername(p->fd, sockp, &sz) != 0 ||
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sz != sizeof(struct sockaddr_in) || sock.sin_family != AF_INET) {
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log_Printf(LogDEBUG, "%s: Link is SOCK_STREAM, but not inet\n",
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p->link.name);
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return NULL;
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}
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log_Printf(LogPHASE, "%s: Link is a tcp socket\n", p->link.name);
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snprintf(p->name.full, sizeof p->name.full, "%s:%d/tcp",
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inet_ntoa(sock.sin_addr), ntohs(sock.sin_port));
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p->name.base = p->name.full;
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}
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physical_SetupStack(p, tcpdevice.name, PHYSICAL_FORCE_ASYNC);
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if (p->cfg.cd.necessity != CD_DEFAULT)
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log_Printf(LogWARN, "Carrier settings ignored\n");
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return &tcpdevice;
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}
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}
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}
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return NULL;
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}
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