Commit | Line | Data |
---|---|---|
38dc5e12 | 1 | /* Serial interface for raw TCP connections on Un*x like systems |
24418cfb | 2 | Copyright 1992, 1993, 1998 Free Software Foundation, Inc. |
38dc5e12 SG |
3 | |
4 | This file is part of GDB. | |
5 | ||
6 | This program is free software; you can redistribute it and/or modify | |
7 | it under the terms of the GNU General Public License as published by | |
8 | the Free Software Foundation; either version 2 of the License, or | |
9 | (at your option) any later version. | |
10 | ||
11 | This program is distributed in the hope that it will be useful, | |
12 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | GNU General Public License for more details. | |
15 | ||
16 | You should have received a copy of the GNU General Public License | |
17 | along with this program; if not, write to the Free Software | |
6c9638b4 | 18 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ |
38dc5e12 SG |
19 | |
20 | #include "defs.h" | |
21 | #include "serial.h" | |
22 | #include <sys/types.h> | |
23 | #include <sys/time.h> | |
24 | #include <netinet/in.h> | |
25 | #include <arpa/inet.h> | |
26 | #include <netdb.h> | |
27 | #include <sys/socket.h> | |
94a42c63 | 28 | |
d836385e | 29 | #ifndef __CYGWIN__ |
38dc5e12 | 30 | #include <netinet/tcp.h> |
94a42c63 GN |
31 | #endif |
32 | ||
38dc5e12 | 33 | #include "signals.h" |
b52cac6b | 34 | #include "gdb_string.h" |
38dc5e12 SG |
35 | |
36 | struct tcp_ttystate | |
37 | { | |
38 | int bogus; | |
39 | }; | |
40 | ||
41 | static int tcp_open PARAMS ((serial_t scb, const char *name)); | |
42 | static void tcp_raw PARAMS ((serial_t scb)); | |
43 | static int wait_for PARAMS ((serial_t scb, int timeout)); | |
44 | static int tcp_readchar PARAMS ((serial_t scb, int timeout)); | |
45 | static int tcp_setbaudrate PARAMS ((serial_t scb, int rate)); | |
85c8b135 | 46 | static int tcp_setstopbits PARAMS ((serial_t scb, int num)); |
38dc5e12 | 47 | static int tcp_write PARAMS ((serial_t scb, const char *str, int len)); |
0ac0a9f6 | 48 | /* FIXME: static void tcp_restore PARAMS ((serial_t scb)); */ |
38dc5e12 SG |
49 | static void tcp_close PARAMS ((serial_t scb)); |
50 | static serial_ttystate tcp_get_tty_state PARAMS ((serial_t scb)); | |
51 | static int tcp_set_tty_state PARAMS ((serial_t scb, serial_ttystate state)); | |
b607efe7 FF |
52 | static int tcp_return_0 PARAMS ((serial_t)); |
53 | static int tcp_noflush_set_tty_state PARAMS ((serial_t, serial_ttystate, | |
54 | serial_ttystate)); | |
55 | static void tcp_print_tty_state PARAMS ((serial_t, serial_ttystate)); | |
38dc5e12 | 56 | |
24418cfb JM |
57 | void _initialize_ser_tcp PARAMS ((void)); |
58 | ||
38dc5e12 SG |
59 | /* Open up a raw tcp socket */ |
60 | ||
61 | static int | |
62 | tcp_open(scb, name) | |
63 | serial_t scb; | |
64 | const char *name; | |
65 | { | |
66 | char *port_str; | |
67 | int port; | |
68 | struct hostent *hostent; | |
69 | struct sockaddr_in sockaddr; | |
70 | int tmp; | |
71 | char hostname[100]; | |
69b2f0fe | 72 | struct protoent *protoent; |
5bdf05c7 | 73 | int i; |
38dc5e12 SG |
74 | |
75 | port_str = strchr (name, ':'); | |
76 | ||
77 | if (!port_str) | |
78 | error ("tcp_open: No colon in host name!"); /* Shouldn't ever happen */ | |
79 | ||
b52cac6b | 80 | tmp = min (port_str - name, (int) sizeof hostname - 1); |
a037b21e SG |
81 | strncpy (hostname, name, tmp); /* Don't want colon */ |
82 | hostname[tmp] = '\000'; /* Tie off host name */ | |
38dc5e12 SG |
83 | port = atoi (port_str + 1); |
84 | ||
85 | hostent = gethostbyname (hostname); | |
86 | ||
87 | if (!hostent) | |
88 | { | |
199b2450 | 89 | fprintf_unfiltered (gdb_stderr, "%s: unknown host\n", hostname); |
38dc5e12 SG |
90 | errno = ENOENT; |
91 | return -1; | |
92 | } | |
93 | ||
4887063b SG |
94 | for (i = 1; i <= 15; i++) |
95 | { | |
96 | scb->fd = socket (PF_INET, SOCK_STREAM, 0); | |
97 | if (scb->fd < 0) | |
98 | return -1; | |
38dc5e12 | 99 | |
4887063b SG |
100 | /* Allow rapid reuse of this port. */ |
101 | tmp = 1; | |
102 | setsockopt (scb->fd, SOL_SOCKET, SO_REUSEADDR, (char *)&tmp, sizeof(tmp)); | |
38dc5e12 | 103 | |
4887063b SG |
104 | /* Enable TCP keep alive process. */ |
105 | tmp = 1; | |
106 | setsockopt (scb->fd, SOL_SOCKET, SO_KEEPALIVE, (char *)&tmp, sizeof(tmp)); | |
38dc5e12 | 107 | |
4887063b SG |
108 | sockaddr.sin_family = PF_INET; |
109 | sockaddr.sin_port = htons(port); | |
110 | memcpy (&sockaddr.sin_addr.s_addr, hostent->h_addr, | |
111 | sizeof (struct in_addr)); | |
38dc5e12 | 112 | |
4887063b SG |
113 | if (!connect (scb->fd, (struct sockaddr *) &sockaddr, sizeof(sockaddr))) |
114 | break; | |
115 | ||
116 | close (scb->fd); | |
a037b21e | 117 | scb->fd = -1; |
4887063b SG |
118 | |
119 | /* We retry for ECONNREFUSED because that is often a temporary condition, which | |
120 | happens when the server is being restarted. */ | |
121 | ||
122 | if (errno != ECONNREFUSED) | |
123 | return -1; | |
124 | ||
125 | sleep (1); | |
38dc5e12 SG |
126 | } |
127 | ||
69b2f0fe SG |
128 | protoent = getprotobyname ("tcp"); |
129 | if (!protoent) | |
130 | return -1; | |
131 | ||
38dc5e12 | 132 | tmp = 1; |
69b2f0fe SG |
133 | if (setsockopt (scb->fd, protoent->p_proto, TCP_NODELAY, |
134 | (char *)&tmp, sizeof(tmp))) | |
38dc5e12 SG |
135 | return -1; |
136 | ||
137 | signal(SIGPIPE, SIG_IGN); /* If we don't do this, then GDB simply exits | |
138 | when the remote side dies. */ | |
139 | ||
140 | return 0; | |
141 | } | |
142 | ||
143 | static serial_ttystate | |
144 | tcp_get_tty_state(scb) | |
145 | serial_t scb; | |
146 | { | |
147 | struct tcp_ttystate *state; | |
148 | ||
149 | state = (struct tcp_ttystate *)xmalloc(sizeof *state); | |
150 | ||
151 | return (serial_ttystate)state; | |
152 | } | |
153 | ||
154 | static int | |
155 | tcp_set_tty_state(scb, ttystate) | |
156 | serial_t scb; | |
157 | serial_ttystate ttystate; | |
158 | { | |
159 | struct tcp_ttystate *state; | |
160 | ||
161 | state = (struct tcp_ttystate *)ttystate; | |
162 | ||
163 | return 0; | |
164 | } | |
165 | ||
c2e247c4 | 166 | static int |
704deef2 | 167 | tcp_return_0 (scb) |
c2e247c4 JK |
168 | serial_t scb; |
169 | { | |
c2e247c4 JK |
170 | return 0; |
171 | } | |
172 | ||
38dc5e12 SG |
173 | static void |
174 | tcp_raw(scb) | |
175 | serial_t scb; | |
176 | { | |
177 | return; /* Always in raw mode */ | |
178 | } | |
179 | ||
180 | /* Wait for input on scb, with timeout seconds. Returns 0 on success, | |
181 | otherwise SERIAL_TIMEOUT or SERIAL_ERROR. | |
182 | ||
183 | For termio{s}, we actually just setup VTIME if necessary, and let the | |
184 | timeout occur in the read() in tcp_read(). | |
185 | */ | |
186 | ||
187 | static int | |
24418cfb | 188 | wait_for (scb, timeout) |
38dc5e12 SG |
189 | serial_t scb; |
190 | int timeout; | |
191 | { | |
192 | int numfds; | |
193 | struct timeval tv; | |
a037b21e | 194 | fd_set readfds, exceptfds; |
38dc5e12 SG |
195 | |
196 | FD_ZERO (&readfds); | |
a037b21e | 197 | FD_ZERO (&exceptfds); |
38dc5e12 SG |
198 | |
199 | tv.tv_sec = timeout; | |
200 | tv.tv_usec = 0; | |
201 | ||
202 | FD_SET(scb->fd, &readfds); | |
a037b21e | 203 | FD_SET(scb->fd, &exceptfds); |
38dc5e12 | 204 | |
a037b21e SG |
205 | while (1) |
206 | { | |
207 | if (timeout >= 0) | |
208 | numfds = select(scb->fd+1, &readfds, 0, &exceptfds, &tv); | |
209 | else | |
210 | numfds = select(scb->fd+1, &readfds, 0, &exceptfds, 0); | |
211 | ||
212 | if (numfds <= 0) | |
24418cfb JM |
213 | { |
214 | if (numfds == 0) | |
215 | return SERIAL_TIMEOUT; | |
216 | else if (errno == EINTR) | |
217 | continue; | |
218 | else | |
219 | return SERIAL_ERROR; /* Got an error from select or poll */ | |
220 | } | |
a037b21e SG |
221 | |
222 | return 0; | |
223 | } | |
38dc5e12 SG |
224 | } |
225 | ||
226 | /* Read a character with user-specified timeout. TIMEOUT is number of seconds | |
227 | to wait, or -1 to wait forever. Use timeout of 0 to effect a poll. Returns | |
228 | char if successful. Returns -2 if timeout expired, EOF if line dropped | |
229 | dead, or -3 for any other error (see errno in that case). */ | |
230 | ||
231 | static int | |
24418cfb | 232 | tcp_readchar (scb, timeout) |
38dc5e12 SG |
233 | serial_t scb; |
234 | int timeout; | |
235 | { | |
236 | int status; | |
237 | ||
238 | if (scb->bufcnt-- > 0) | |
239 | return *scb->bufp++; | |
240 | ||
241 | status = wait_for(scb, timeout); | |
242 | ||
243 | if (status < 0) | |
244 | return status; | |
245 | ||
2e6784a8 SG |
246 | while (1) |
247 | { | |
248 | scb->bufcnt = read(scb->fd, scb->buf, BUFSIZ); | |
249 | if (scb->bufcnt != -1 || errno != EINTR) | |
250 | break; | |
251 | } | |
38dc5e12 SG |
252 | |
253 | if (scb->bufcnt <= 0) | |
24418cfb JM |
254 | { |
255 | if (scb->bufcnt == 0) | |
256 | return SERIAL_TIMEOUT; /* 0 chars means timeout [may need to | |
257 | distinguish between EOF & timeouts | |
258 | someday] */ | |
259 | else | |
260 | return SERIAL_ERROR; /* Got an error from read */ | |
261 | } | |
38dc5e12 SG |
262 | |
263 | scb->bufcnt--; | |
264 | scb->bufp = scb->buf; | |
265 | return *scb->bufp++; | |
266 | } | |
267 | ||
c2e247c4 JK |
268 | static int |
269 | tcp_noflush_set_tty_state (scb, new_ttystate, old_ttystate) | |
270 | serial_t scb; | |
271 | serial_ttystate new_ttystate; | |
272 | serial_ttystate old_ttystate; | |
273 | { | |
274 | return 0; | |
275 | } | |
276 | ||
277 | static void | |
278 | tcp_print_tty_state (scb, ttystate) | |
279 | serial_t scb; | |
280 | serial_ttystate ttystate; | |
281 | { | |
282 | /* Nothing to print. */ | |
283 | return; | |
284 | } | |
285 | ||
38dc5e12 SG |
286 | static int |
287 | tcp_setbaudrate(scb, rate) | |
288 | serial_t scb; | |
289 | int rate; | |
290 | { | |
291 | return 0; /* Never fails! */ | |
292 | } | |
293 | ||
85c8b135 SG |
294 | static int |
295 | tcp_setstopbits(scb, num) | |
296 | serial_t scb; | |
297 | int num; | |
298 | { | |
299 | return 0; /* Never fails! */ | |
300 | } | |
301 | ||
38dc5e12 SG |
302 | static int |
303 | tcp_write(scb, str, len) | |
304 | serial_t scb; | |
305 | const char *str; | |
306 | int len; | |
307 | { | |
308 | int cc; | |
309 | ||
310 | while (len > 0) | |
311 | { | |
312 | cc = write(scb->fd, str, len); | |
313 | ||
314 | if (cc < 0) | |
315 | return 1; | |
316 | len -= cc; | |
317 | str += cc; | |
318 | } | |
319 | return 0; | |
320 | } | |
321 | ||
322 | static void | |
323 | tcp_close(scb) | |
324 | serial_t scb; | |
325 | { | |
326 | if (scb->fd < 0) | |
327 | return; | |
328 | ||
329 | close(scb->fd); | |
330 | scb->fd = -1; | |
331 | } | |
332 | ||
333 | static struct serial_ops tcp_ops = | |
334 | { | |
335 | "tcp", | |
336 | 0, | |
337 | tcp_open, | |
338 | tcp_close, | |
339 | tcp_readchar, | |
340 | tcp_write, | |
704deef2 JK |
341 | tcp_return_0, /* flush output */ |
342 | tcp_return_0, /* flush input */ | |
343 | tcp_return_0, /* send break */ | |
38dc5e12 SG |
344 | tcp_raw, |
345 | tcp_get_tty_state, | |
346 | tcp_set_tty_state, | |
c2e247c4 JK |
347 | tcp_print_tty_state, |
348 | tcp_noflush_set_tty_state, | |
38dc5e12 | 349 | tcp_setbaudrate, |
85c8b135 | 350 | tcp_setstopbits, |
3ffbdf15 | 351 | tcp_return_0, /* wait for output to drain */ |
38dc5e12 SG |
352 | }; |
353 | ||
354 | void | |
355 | _initialize_ser_tcp () | |
356 | { | |
357 | serial_add_interface (&tcp_ops); | |
358 | } |