146686Sbrian/*- 246686Sbrian * Copyright (c) 1999 Brian Somers <brian@Awfulhak.org> 346686Sbrian * All rights reserved. 446686Sbrian * 546686Sbrian * Redistribution and use in source and binary forms, with or without 646686Sbrian * modification, are permitted provided that the following conditions 746686Sbrian * are met: 846686Sbrian * 1. Redistributions of source code must retain the above copyright 946686Sbrian * notice, this list of conditions and the following disclaimer. 1046686Sbrian * 2. Redistributions in binary form must reproduce the above copyright 1146686Sbrian * notice, this list of conditions and the following disclaimer in the 1246686Sbrian * documentation and/or other materials provided with the distribution. 1346686Sbrian * 1446686Sbrian * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 1546686Sbrian * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 1646686Sbrian * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 1746686Sbrian * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 1846686Sbrian * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 1946686Sbrian * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 2046686Sbrian * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 2146686Sbrian * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 2246686Sbrian * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 2346686Sbrian * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 2446686Sbrian * SUCH DAMAGE. 2546686Sbrian * 2650479Speter * $FreeBSD$ 2746686Sbrian */ 2846686Sbrian 2946686Sbrian#include <sys/types.h> 3046686Sbrian#include <sys/socket.h> 3146686Sbrian#include <netinet/in.h> 3246686Sbrian#include <arpa/inet.h> 3346686Sbrian#include <netdb.h> 3446686Sbrian 3546686Sbrian#include <errno.h> 3646686Sbrian#include <stdio.h> 3746686Sbrian#include <stdlib.h> 3846686Sbrian#include <string.h> 3971006Sbrian#include <sys/stat.h> 4047769Sbrian#include <sys/uio.h> 4146686Sbrian#include <termios.h> 4246686Sbrian#include <unistd.h> 4346686Sbrian 4446686Sbrian#include "layer.h" 4546686Sbrian#include "defs.h" 4646686Sbrian#include "mbuf.h" 4746686Sbrian#include "log.h" 4846686Sbrian#include "timer.h" 4946686Sbrian#include "lqr.h" 5046686Sbrian#include "hdlc.h" 5146686Sbrian#include "throughput.h" 5246686Sbrian#include "fsm.h" 5346686Sbrian#include "lcp.h" 5446686Sbrian#include "ccp.h" 5546686Sbrian#include "link.h" 5646686Sbrian#include "async.h" 5746686Sbrian#include "descriptor.h" 5846686Sbrian#include "physical.h" 5946686Sbrian#include "tcp.h" 6046686Sbrian 6146686Sbrianstatic int 6247061Sbriantcp_OpenConnection(const char *name, char *host, char *port) 6346686Sbrian{ 6446686Sbrian struct sockaddr_in dest; 6546686Sbrian int sock; 6646686Sbrian struct servent *sp; 6746686Sbrian 6846686Sbrian dest.sin_family = AF_INET; 6946686Sbrian dest.sin_addr = GetIpAddr(host); 7046686Sbrian if (dest.sin_addr.s_addr == INADDR_NONE) { 7146686Sbrian log_Printf(LogWARN, "%s: %s: unknown host\n", name, host); 7260779Sbrian return -2; 7346686Sbrian } 7446686Sbrian dest.sin_port = htons(atoi(port)); 7546686Sbrian if (dest.sin_port == 0) { 7646686Sbrian sp = getservbyname(port, "tcp"); 7747061Sbrian if (sp) 7846686Sbrian dest.sin_port = sp->s_port; 7947061Sbrian else { 8046686Sbrian log_Printf(LogWARN, "%s: %s: unknown service\n", name, port); 8160779Sbrian return -2; 8246686Sbrian } 8346686Sbrian } 8447061Sbrian log_Printf(LogPHASE, "%s: Connecting to %s:%s/tcp\n", name, host, port); 8546686Sbrian 8689422Sbrian sock = socket(PF_INET, SOCK_STREAM, 0); 8747061Sbrian if (sock < 0) 8860779Sbrian return -2; 8947061Sbrian 9046686Sbrian if (connect(sock, (struct sockaddr *)&dest, sizeof dest) < 0) { 9146686Sbrian log_Printf(LogWARN, "%s: connect: %s\n", name, strerror(errno)); 9246686Sbrian close(sock); 9360779Sbrian return -2; 9446686Sbrian } 9546686Sbrian 9647061Sbrian return sock; 9746686Sbrian} 9846686Sbrian 9947061Sbrianstatic struct device tcpdevice = { 10047061Sbrian TCP_DEVICE, 10146686Sbrian "tcp", 10278410Sbrian 0, 10353733Sbrian { CD_NOTREQUIRED, 0 }, 10446686Sbrian NULL, 10546686Sbrian NULL, 10646686Sbrian NULL, 10746686Sbrian NULL, 10846686Sbrian NULL, 10946686Sbrian NULL, 11047061Sbrian NULL, 11147061Sbrian NULL, 11247061Sbrian NULL, 11349472Sbrian NULL, 11452942Sbrian NULL, 11593418Sbrian NULL, 11696582Sbrian NULL, 11746686Sbrian NULL 11846686Sbrian}; 11947061Sbrian 12047061Sbrianstruct device * 12147061Sbriantcp_iov2device(int type, struct physical *p, struct iovec *iov, 122134789Sbrian int *niov, int maxiov __unused, int *auxfd __unused, 123134789Sbrian int *nauxfd __unused) 12447061Sbrian{ 12547461Sbrian if (type == TCP_DEVICE) { 12647769Sbrian free(iov[(*niov)++].iov_base); 12747461Sbrian physical_SetupStack(p, tcpdevice.name, PHYSICAL_FORCE_ASYNC); 12847061Sbrian return &tcpdevice; 12947461Sbrian } 13047061Sbrian 13147061Sbrian return NULL; 13247061Sbrian} 13347061Sbrian 13447061Sbrianstruct device * 13547061Sbriantcp_Create(struct physical *p) 13647061Sbrian{ 13747061Sbrian char *cp, *host, *port, *svc; 13847061Sbrian 13947061Sbrian if (p->fd < 0) { 14052942Sbrian if ((cp = strchr(p->name.full, ':')) != NULL && !strchr(cp + 1, ':')) { 14147061Sbrian *cp = '\0'; 14247061Sbrian host = p->name.full; 14347061Sbrian port = cp + 1; 14447061Sbrian svc = strchr(port, '/'); 14547061Sbrian if (svc && strcasecmp(svc, "/tcp")) { 14647061Sbrian *cp = ':'; 14747061Sbrian return 0; 14847061Sbrian } 14952942Sbrian if (svc) { 15052942Sbrian p->fd--; /* We own the device but maybe can't use it - change fd */ 15147061Sbrian *svc = '\0'; 15252942Sbrian } 15347061Sbrian if (*host && *port) { 15447061Sbrian p->fd = tcp_OpenConnection(p->link.name, host, port); 15547061Sbrian *cp = ':'; 15647061Sbrian if (svc) 15747061Sbrian *svc = '/'; 15847061Sbrian if (p->fd >= 0) 15947061Sbrian log_Printf(LogDEBUG, "%s: Opened tcp socket %s\n", p->link.name, 16047061Sbrian p->name.full); 16147061Sbrian } else { 16247061Sbrian if (svc) 16347061Sbrian *svc = '/'; 16447061Sbrian *cp = ':'; 16547061Sbrian } 16647061Sbrian } 16747061Sbrian } 16847061Sbrian 16947061Sbrian if (p->fd >= 0) { 17047061Sbrian /* See if we're a tcp socket */ 17171006Sbrian struct stat st; 17247061Sbrian 17371006Sbrian if (fstat(p->fd, &st) != -1 && (st.st_mode & S_IFSOCK)) { 17471006Sbrian int type, sz; 17547061Sbrian 17671006Sbrian sz = sizeof type; 17771006Sbrian if (getsockopt(p->fd, SOL_SOCKET, SO_TYPE, &type, &sz) == -1) { 17871006Sbrian log_Printf(LogPHASE, "%s: Link is a closed socket !\n", p->link.name); 17971006Sbrian close(p->fd); 18071006Sbrian p->fd = -1; 18171006Sbrian return NULL; 18271006Sbrian } 18347061Sbrian 18471006Sbrian if (sz == sizeof type && type == SOCK_STREAM) { 18571006Sbrian struct sockaddr_in sock; 18671006Sbrian struct sockaddr *sockp = (struct sockaddr *)&sock; 18747061Sbrian 18871006Sbrian if (*p->name.full == '\0') { 18971006Sbrian sz = sizeof sock; 19071006Sbrian if (getpeername(p->fd, sockp, &sz) != 0 || 19171006Sbrian sz != sizeof(struct sockaddr_in) || sock.sin_family != AF_INET) { 19271006Sbrian log_Printf(LogDEBUG, "%s: Link is SOCK_STREAM, but not inet\n", 19371006Sbrian p->link.name); 19471006Sbrian return NULL; 19571006Sbrian } 19671006Sbrian 19771006Sbrian log_Printf(LogPHASE, "%s: Link is a tcp socket\n", p->link.name); 19871006Sbrian 19971006Sbrian snprintf(p->name.full, sizeof p->name.full, "%s:%d/tcp", 20071006Sbrian inet_ntoa(sock.sin_addr), ntohs(sock.sin_port)); 20171006Sbrian p->name.base = p->name.full; 20271006Sbrian } 20371006Sbrian physical_SetupStack(p, tcpdevice.name, PHYSICAL_FORCE_ASYNC); 20471006Sbrian if (p->cfg.cd.necessity != CD_DEFAULT) 20571006Sbrian log_Printf(LogWARN, "Carrier settings ignored\n"); 20671006Sbrian return &tcpdevice; 20747061Sbrian } 20847061Sbrian } 20947061Sbrian } 21047061Sbrian 21147061Sbrian return NULL; 21247061Sbrian} 213