1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
|
/* 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);
}
|
