/* Serial interface for raw TCP connections on Un*x like systems Copyright 1992, 1993, 1994, 1995, 1996, 1998, 1999, 2001 Free Software Foundation, Inc. This file is part of GDB. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ #include "defs.h" #include "serial.h" #include "ser-unix.h" #include <sys/types.h> #include <sys/time.h> #include <netinet/in.h> #include <arpa/inet.h> #include <netdb.h> #include <sys/socket.h> #include <netinet/tcp.h> #include <signal.h> #include "gdb_string.h" static int tcp_open (struct serial *scb, const char *name); static void tcp_close (struct serial *scb); void _initialize_ser_tcp (void); /* Open up a raw tcp socket */ static int tcp_open (struct serial *scb, const char *name) { char *port_str; int port; struct hostent *hostent; struct sockaddr_in sockaddr; int tmp; char hostname[100]; struct protoent *protoent; int i; port_str = strchr (name, ':'); if (!port_str) error ("tcp_open: No colon in host name!"); /* Shouldn't ever happen */ tmp = min (port_str - name, (int) sizeof hostname - 1); strncpy (hostname, name, tmp); /* Don't want colon */ hostname[tmp] = '\000'; /* Tie off host name */ port = atoi (port_str + 1); if (!hostname[0]) strcpy (hostname, "localhost"); hostent = gethostbyname (hostname); if (!hostent) { fprintf_unfiltered (gdb_stderr, "%s: unknown host\n", hostname); errno = ENOENT; return -1; } for (i = 1; i <= 15; i++) { scb->fd = socket (PF_INET, SOCK_STREAM, 0); if (scb->fd < 0) return -1; /* Allow rapid reuse of this port. */ tmp = 1; setsockopt (scb->fd, SOL_SOCKET, SO_REUSEADDR, (char *) &tmp, sizeof (tmp)); /* Enable TCP keep alive process. */ tmp = 1; setsockopt (scb->fd, SOL_SOCKET, SO_KEEPALIVE, (char *) &tmp, sizeof (tmp)); sockaddr.sin_family = PF_INET; sockaddr.sin_port = htons (port); memcpy (&sockaddr.sin_addr.s_addr, hostent->h_addr, sizeof (struct in_addr)); if (!connect (scb->fd, (struct sockaddr *) &sockaddr, sizeof (sockaddr))) break; close (scb->fd); scb->fd = -1; /* We retry for ECONNREFUSED because that is often a temporary condition, which happens when the server is being restarted. */ if (errno != ECONNREFUSED) return -1; sleep (1); } protoent = getprotobyname ("tcp"); if (!protoent) return -1; tmp = 1; if (setsockopt (scb->fd, protoent->p_proto, TCP_NODELAY, (char *) &tmp, sizeof (tmp))) return -1; signal (SIGPIPE, SIG_IGN); /* If we don't do this, then GDB simply exits when the remote side dies. */ return 0; } static void tcp_close (struct serial *scb) { if (scb->fd < 0) return; close (scb->fd); scb->fd = -1; } void _initialize_ser_tcp (void) { struct serial_ops *ops = XMALLOC (struct serial_ops); memset (ops, sizeof (struct serial_ops), 0); ops->name = "tcp"; ops->next = 0; ops->open = tcp_open; ops->close = tcp_close; ops->readchar = ser_unix_readchar; ops->write = ser_unix_write; ops->flush_output = ser_unix_nop_flush_output; ops->flush_input = ser_unix_flush_input; ops->send_break = ser_unix_nop_send_break; ops->go_raw = ser_unix_nop_raw; ops->get_tty_state = ser_unix_nop_get_tty_state; ops->set_tty_state = ser_unix_nop_set_tty_state; ops->print_tty_state = ser_unix_nop_print_tty_state; ops->noflush_set_tty_state = ser_unix_nop_noflush_set_tty_state; ops->setbaudrate = ser_unix_nop_setbaudrate; ops->setstopbits = ser_unix_nop_setstopbits; ops->drain_output = ser_unix_nop_drain_output; ops->async = ser_unix_async; serial_add_interface (ops); }