diff options
Diffstat (limited to 'src/tcp.c')
| -rw-r--r-- | src/tcp.c | 212 |
1 files changed, 212 insertions, 0 deletions
diff --git a/src/tcp.c b/src/tcp.c new file mode 100644 index 0000000..5c42e54 --- /dev/null +++ b/src/tcp.c @@ -0,0 +1,212 @@ +/*- + * Copyright (c) 1999 Brian Somers <brian@Awfulhak.org> + * 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. + * + * $FreeBSD: src/usr.sbin/ppp/tcp.c,v 1.19.26.1 2010/12/21 17:10:29 kensmith Exp $ + */ + +#include <sys/types.h> +#include <sys/socket.h> +#include <netinet/in.h> +#include <arpa/inet.h> +#include <netdb.h> + +#include <errno.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <sys/stat.h> +#include <sys/uio.h> +#include <termios.h> +#include <unistd.h> + +#include "layer.h" +#include "defs.h" +#include "mbuf.h" +#include "log.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 = GetIpAddr(host); + if (dest.sin_addr.s_addr == INADDR_NONE) { + log_Printf(LogWARN, "%s: %s: unknown host\n", name, host); + return -2; + } + 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 -2; + } + } + log_Printf(LogPHASE, "%s: Connecting to %s:%s/tcp\n", name, host, port); + + sock = socket(PF_INET, SOCK_STREAM, 0); + if (sock < 0) + return -2; + + if (connect(sock, (struct sockaddr *)&dest, sizeof dest) < 0) { + log_Printf(LogWARN, "%s: connect: %s\n", name, strerror(errno)); + close(sock); + return -2; + } + + return sock; +} + +static struct device tcpdevice = { + TCP_DEVICE, + "tcp", + 0, + { CD_NOTREQUIRED, 0 }, + NULL, + NULL, + NULL, + NULL, + 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 __unused, int *auxfd __unused, + int *nauxfd __unused) +{ + 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 && !strchr(cp + 1, ':')) { + *cp = '\0'; + host = p->name.full; + port = cp + 1; + svc = strchr(port, '/'); + if (svc && strcasecmp(svc, "/tcp")) { + *cp = ':'; + return 0; + } + if (svc) { + p->fd--; /* We own the device but maybe can't use it - change fd */ + *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 */ + struct stat st; + + if (fstat(p->fd, &st) != -1 && (st.st_mode & S_IFSOCK)) { + int type, sz; + + sz = sizeof type; + if (getsockopt(p->fd, SOL_SOCKET, SO_TYPE, &type, &sz) == -1) { + log_Printf(LogPHASE, "%s: Link is a closed socket !\n", p->link.name); + close(p->fd); + p->fd = -1; + return NULL; + } + + if (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); + if (p->cfg.cd.necessity != CD_DEFAULT) + log_Printf(LogWARN, "Carrier settings ignored\n"); + return &tcpdevice; + } + } + } + + return NULL; +} |