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199b2450f6
Change all references to stdout/stderr to gdb_stdout/gdb_stderr. Replace all calls to stdio output functions with calls to corresponding _unfiltered functions (`fprintf_unfiltered') Replaced calls to fopen for output to gdb_fopen. Added sufficient goo to utils.c and defs.h to make the above work. The net effect is that stdio output functions are only directly used in utils.c. Elsewhere, the _unfiltered and _filtered functions and GDB_FILE type are used. In the near future, GDB_FILE will stop being equivalant to FILE. The semantics of some commands has changed in a very subtle way: called in the right context, they may cause new occurences of prompt_for_continue() behavior. The testsuite doesn't notice anything like this, though. Please respect this change by not reintroducing stdio output dependencies in the main body of gdb code. All output from commands should go to a GDB_FILE. Target-specific code can still use stdio directly to communicate with targets.
317 lines
6.7 KiB
C
317 lines
6.7 KiB
C
/* Serial interface for raw TCP connections on Un*x like systems
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Copyright 1992, 1993 Free Software Foundation, Inc.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
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#include "defs.h"
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#include "serial.h"
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#include <sys/types.h>
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#include <sys/time.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 <sys/socket.h>
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#include <netinet/tcp.h>
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#include "signals.h"
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struct tcp_ttystate
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{
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int bogus;
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};
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static int tcp_open PARAMS ((serial_t scb, const char *name));
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static void tcp_raw PARAMS ((serial_t scb));
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static int wait_for PARAMS ((serial_t scb, int timeout));
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static int tcp_readchar PARAMS ((serial_t scb, int timeout));
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static int tcp_setbaudrate PARAMS ((serial_t scb, int rate));
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static int tcp_write PARAMS ((serial_t scb, const char *str, int len));
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/* FIXME: static void tcp_restore PARAMS ((serial_t scb)); */
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static void tcp_close PARAMS ((serial_t scb));
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static serial_ttystate tcp_get_tty_state PARAMS ((serial_t scb));
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static int tcp_set_tty_state PARAMS ((serial_t scb, serial_ttystate state));
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/* Open up a raw tcp socket */
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static int
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tcp_open(scb, name)
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serial_t scb;
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const char *name;
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{
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char *port_str;
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int port;
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struct hostent *hostent;
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struct sockaddr_in sockaddr;
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int tmp;
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char hostname[100];
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struct protoent *protoent;
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port_str = strchr (name, ':');
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if (!port_str)
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error ("tcp_open: No colon in host name!"); /* Shouldn't ever happen */
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tmp = min (port_str - name, sizeof hostname - 1);
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strncpy (hostname, name, tmp); /* Don't want colon */
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hostname[tmp] = '\000'; /* Tie off host name */
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port = atoi (port_str + 1);
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hostent = gethostbyname (hostname);
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if (!hostent)
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{
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fprintf_unfiltered (gdb_stderr, "%s: unknown host\n", hostname);
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errno = ENOENT;
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return -1;
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}
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scb->fd = socket (PF_INET, SOCK_STREAM, 0);
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if (scb->fd < 0)
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return -1;
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/* Allow rapid reuse of this port. */
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tmp = 1;
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setsockopt (scb->fd, SOL_SOCKET, SO_REUSEADDR, (char *)&tmp, sizeof(tmp));
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/* Enable TCP keep alive process. */
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tmp = 1;
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setsockopt (scb->fd, SOL_SOCKET, SO_KEEPALIVE, (char *)&tmp, sizeof(tmp));
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sockaddr.sin_family = PF_INET;
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sockaddr.sin_port = htons(port);
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memcpy (&sockaddr.sin_addr.s_addr, hostent->h_addr,
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sizeof (struct in_addr));
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if (connect (scb->fd, &sockaddr, sizeof(sockaddr)))
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{
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close(scb->fd);
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scb->fd = -1;
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return -1;
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}
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protoent = getprotobyname ("tcp");
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if (!protoent)
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return -1;
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tmp = 1;
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if (setsockopt (scb->fd, protoent->p_proto, TCP_NODELAY,
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(char *)&tmp, sizeof(tmp)))
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return -1;
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signal(SIGPIPE, SIG_IGN); /* If we don't do this, then GDB simply exits
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when the remote side dies. */
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return 0;
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}
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static serial_ttystate
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tcp_get_tty_state(scb)
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serial_t scb;
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{
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struct tcp_ttystate *state;
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state = (struct tcp_ttystate *)xmalloc(sizeof *state);
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return (serial_ttystate)state;
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}
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static int
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tcp_set_tty_state(scb, ttystate)
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serial_t scb;
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serial_ttystate ttystate;
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{
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struct tcp_ttystate *state;
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state = (struct tcp_ttystate *)ttystate;
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return 0;
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}
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static int
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tcp_return_0 (scb)
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serial_t scb;
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{
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return 0;
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}
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static void
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tcp_raw(scb)
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serial_t scb;
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{
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return; /* Always in raw mode */
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}
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/* Wait for input on scb, with timeout seconds. Returns 0 on success,
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otherwise SERIAL_TIMEOUT or SERIAL_ERROR.
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For termio{s}, we actually just setup VTIME if necessary, and let the
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timeout occur in the read() in tcp_read().
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*/
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static int
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wait_for(scb, timeout)
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serial_t scb;
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int timeout;
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{
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int numfds;
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struct timeval tv;
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fd_set readfds, exceptfds;
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FD_ZERO (&readfds);
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FD_ZERO (&exceptfds);
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tv.tv_sec = timeout;
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tv.tv_usec = 0;
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FD_SET(scb->fd, &readfds);
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FD_SET(scb->fd, &exceptfds);
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while (1)
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{
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if (timeout >= 0)
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numfds = select(scb->fd+1, &readfds, 0, &exceptfds, &tv);
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else
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numfds = select(scb->fd+1, &readfds, 0, &exceptfds, 0);
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if (numfds <= 0)
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if (numfds == 0)
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return SERIAL_TIMEOUT;
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else if (errno == EINTR)
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continue;
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else
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return SERIAL_ERROR; /* Got an error from select or poll */
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return 0;
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}
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}
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/* Read a character with user-specified timeout. TIMEOUT is number of seconds
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to wait, or -1 to wait forever. Use timeout of 0 to effect a poll. Returns
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char if successful. Returns -2 if timeout expired, EOF if line dropped
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dead, or -3 for any other error (see errno in that case). */
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static int
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tcp_readchar(scb, timeout)
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serial_t scb;
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int timeout;
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{
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int status;
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if (scb->bufcnt-- > 0)
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return *scb->bufp++;
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status = wait_for(scb, timeout);
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if (status < 0)
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return status;
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scb->bufcnt = read(scb->fd, scb->buf, BUFSIZ);
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if (scb->bufcnt <= 0)
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if (scb->bufcnt == 0)
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return SERIAL_TIMEOUT; /* 0 chars means timeout [may need to
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distinguish between EOF & timeouts
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someday] */
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else
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return SERIAL_ERROR; /* Got an error from read */
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scb->bufcnt--;
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scb->bufp = scb->buf;
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return *scb->bufp++;
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}
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static int
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tcp_noflush_set_tty_state (scb, new_ttystate, old_ttystate)
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serial_t scb;
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serial_ttystate new_ttystate;
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serial_ttystate old_ttystate;
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{
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return 0;
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}
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static void
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tcp_print_tty_state (scb, ttystate)
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serial_t scb;
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serial_ttystate ttystate;
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{
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/* Nothing to print. */
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return;
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}
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static int
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tcp_setbaudrate(scb, rate)
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serial_t scb;
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int rate;
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{
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return 0; /* Never fails! */
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}
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static int
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tcp_write(scb, str, len)
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serial_t scb;
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const char *str;
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int len;
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{
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int cc;
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while (len > 0)
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{
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cc = write(scb->fd, str, len);
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if (cc < 0)
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return 1;
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len -= cc;
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str += cc;
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}
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return 0;
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}
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static void
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tcp_close(scb)
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serial_t scb;
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{
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if (scb->fd < 0)
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return;
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close(scb->fd);
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scb->fd = -1;
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}
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static struct serial_ops tcp_ops =
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{
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"tcp",
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0,
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tcp_open,
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tcp_close,
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tcp_readchar,
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tcp_write,
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tcp_return_0, /* flush output */
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tcp_return_0, /* flush input */
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tcp_return_0, /* send break */
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tcp_raw,
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tcp_get_tty_state,
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tcp_set_tty_state,
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tcp_print_tty_state,
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tcp_noflush_set_tty_state,
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tcp_setbaudrate,
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};
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void
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_initialize_ser_tcp ()
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{
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serial_add_interface (&tcp_ops);
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}
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