/*- * Copyright (c) 1999 Brian Somers * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. * * $Id: tcp.c,v 1.6 1999/07/15 02:10:32 brian Exp $ */ #include #include #include #include #include #include #include #include #include #include #include #include #include "layer.h" #include "defs.h" #include "mbuf.h" #include "log.h" #include "sync.h" #include "timer.h" #include "lqr.h" #include "hdlc.h" #include "throughput.h" #include "fsm.h" #include "lcp.h" #include "ccp.h" #include "link.h" #include "async.h" #include "descriptor.h" #include "physical.h" #include "tcp.h" static int tcp_OpenConnection(const char *name, char *host, char *port) { struct sockaddr_in dest; int sock; struct servent *sp; dest.sin_family = AF_INET; dest.sin_addr.s_addr = inet_addr(host); dest.sin_addr = GetIpAddr(host); if (dest.sin_addr.s_addr == INADDR_NONE) { log_Printf(LogWARN, "%s: %s: unknown host\n", name, host); return -1; } dest.sin_port = htons(atoi(port)); if (dest.sin_port == 0) { sp = getservbyname(port, "tcp"); if (sp) dest.sin_port = sp->s_port; else { log_Printf(LogWARN, "%s: %s: unknown service\n", name, port); return -1; } } log_Printf(LogPHASE, "%s: Connecting to %s:%s/tcp\n", name, host, port); sock = socket(PF_INET, SOCK_STREAM, 0); if (sock < 0) return sock; if (connect(sock, (struct sockaddr *)&dest, sizeof dest) < 0) { log_Printf(LogWARN, "%s: connect: %s\n", name, strerror(errno)); close(sock); return -1; } return sock; } static struct device tcpdevice = { TCP_DEVICE, "tcp", NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL }; struct device * tcp_iov2device(int type, struct physical *p, struct iovec *iov, int *niov, int maxiov) { if (type == TCP_DEVICE) { free(iov[(*niov)++].iov_base); physical_SetupStack(p, tcpdevice.name, PHYSICAL_FORCE_ASYNC); return &tcpdevice; } return NULL; } struct device * tcp_Create(struct physical *p) { char *cp, *host, *port, *svc; if (p->fd < 0) { if ((cp = strchr(p->name.full, ':')) != NULL) { *cp = '\0'; host = p->name.full; port = cp + 1; svc = strchr(port, '/'); if (svc && strcasecmp(svc, "/tcp")) { *cp = ':'; return 0; } if (svc) *svc = '\0'; if (*host && *port) { p->fd = tcp_OpenConnection(p->link.name, host, port); *cp = ':'; if (svc) *svc = '/'; if (p->fd >= 0) log_Printf(LogDEBUG, "%s: Opened tcp socket %s\n", p->link.name, p->name.full); } else { if (svc) *svc = '/'; *cp = ':'; } } } if (p->fd >= 0) { /* See if we're a tcp socket */ int type, sz, err; sz = sizeof type; if ((err = getsockopt(p->fd, SOL_SOCKET, SO_TYPE, &type, &sz)) == 0 && sz == sizeof type && type == SOCK_STREAM) { struct sockaddr_in sock; struct sockaddr *sockp = (struct sockaddr *)&sock; if (*p->name.full == '\0') { sz = sizeof sock; if (getpeername(p->fd, sockp, &sz) != 0 || sz != sizeof(struct sockaddr_in) || sock.sin_family != AF_INET) { log_Printf(LogDEBUG, "%s: Link is SOCK_STREAM, but not inet\n", p->link.name); return NULL; } log_Printf(LogPHASE, "%s: Link is a tcp socket\n", p->link.name); snprintf(p->name.full, sizeof p->name.full, "%s:%d/tcp", inet_ntoa(sock.sin_addr), ntohs(sock.sin_port)); p->name.base = p->name.full; } physical_SetupStack(p, tcpdevice.name, PHYSICAL_FORCE_ASYNC); return &tcpdevice; } } return NULL; }