1 | /* |
---|
2 | * This file is part of libtrace |
---|
3 | * |
---|
4 | * Copyright (c) 2007,2008 The University of Waikato, Hamilton, New Zealand. |
---|
5 | * Authors: Daniel Lawson |
---|
6 | * Perry Lorier |
---|
7 | * Shane Alcock |
---|
8 | * |
---|
9 | * All rights reserved. |
---|
10 | * |
---|
11 | * This code has been developed by the University of Waikato WAND |
---|
12 | * research group. For further information please see http://www.wand.net.nz/ |
---|
13 | * |
---|
14 | * libtrace is free software; you can redistribute it and/or modify |
---|
15 | * it under the terms of the GNU General Public License as published by |
---|
16 | * the Free Software Foundation; either version 2 of the License, or |
---|
17 | * (at your option) any later version. |
---|
18 | * |
---|
19 | * libtrace is distributed in the hope that it will be useful, |
---|
20 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
---|
21 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
---|
22 | * GNU General Public License for more details. |
---|
23 | * |
---|
24 | * You should have received a copy of the GNU General Public License |
---|
25 | * along with libtrace; if not, write to the Free Software |
---|
26 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
---|
27 | * |
---|
28 | * $Id$ |
---|
29 | * |
---|
30 | */ |
---|
31 | |
---|
32 | #define _GNU_SOURCE |
---|
33 | |
---|
34 | #include "config.h" |
---|
35 | #include "common.h" |
---|
36 | #include "libtrace.h" |
---|
37 | #include "libtrace_int.h" |
---|
38 | #include "format_helper.h" |
---|
39 | #include "rt_protocol.h" |
---|
40 | |
---|
41 | #include <sys/stat.h> |
---|
42 | #include <assert.h> |
---|
43 | #include <errno.h> |
---|
44 | #include <fcntl.h> |
---|
45 | #include <stdio.h> |
---|
46 | #include <string.h> |
---|
47 | #include <stdlib.h> |
---|
48 | |
---|
49 | #ifndef WIN32 |
---|
50 | # include <netdb.h> |
---|
51 | #endif |
---|
52 | |
---|
53 | #define RT_INFO ((struct rt_format_data_t*)libtrace->format_data) |
---|
54 | |
---|
55 | static const char *rt_deny_reason(enum rt_conn_denied_t reason) |
---|
56 | { |
---|
57 | const char *string = 0; |
---|
58 | |
---|
59 | switch(reason) { |
---|
60 | case RT_DENY_WRAPPER: |
---|
61 | string = "Rejected by TCP Wrappers"; |
---|
62 | break; |
---|
63 | case RT_DENY_FULL: |
---|
64 | string = "Max connections reached on server"; |
---|
65 | break; |
---|
66 | case RT_DENY_AUTH: |
---|
67 | string = "Authentication failed"; |
---|
68 | break; |
---|
69 | default: |
---|
70 | string = "Unknown reason"; |
---|
71 | } |
---|
72 | |
---|
73 | return string; |
---|
74 | } |
---|
75 | |
---|
76 | |
---|
77 | struct rt_format_data_t { |
---|
78 | char *hostname; |
---|
79 | int port; |
---|
80 | int input_fd; |
---|
81 | int reliable; |
---|
82 | char *pkt_buffer; |
---|
83 | char *buf_current; |
---|
84 | size_t buf_filled; |
---|
85 | rt_header_t rt_hdr; |
---|
86 | |
---|
87 | libtrace_t *dummy_duck; |
---|
88 | libtrace_t *dummy_erf; |
---|
89 | libtrace_t *dummy_pcap; |
---|
90 | libtrace_t *dummy_linux; |
---|
91 | }; |
---|
92 | |
---|
93 | static int rt_connect(libtrace_t *libtrace) { |
---|
94 | struct hostent *he; |
---|
95 | struct sockaddr_in remote; |
---|
96 | rt_header_t connect_msg; |
---|
97 | rt_deny_conn_t deny_hdr; |
---|
98 | rt_hello_t hello_opts; |
---|
99 | uint8_t reason; |
---|
100 | |
---|
101 | if ((he=gethostbyname(RT_INFO->hostname)) == NULL) { |
---|
102 | trace_set_err(libtrace, TRACE_ERR_INIT_FAILED, |
---|
103 | "Failed to convert hostname %s to address", |
---|
104 | RT_INFO->hostname); |
---|
105 | return -1; |
---|
106 | } |
---|
107 | if ((RT_INFO->input_fd = socket(AF_INET, SOCK_STREAM, 0)) == -1) { |
---|
108 | trace_set_err(libtrace, TRACE_ERR_INIT_FAILED, |
---|
109 | "Could not create socket"); |
---|
110 | return -1; |
---|
111 | } |
---|
112 | |
---|
113 | memset(&remote,0, sizeof(remote)); |
---|
114 | remote.sin_family = AF_INET; |
---|
115 | remote.sin_port = htons(RT_INFO->port); |
---|
116 | remote.sin_addr = *((struct in_addr *)he->h_addr); |
---|
117 | |
---|
118 | if (connect(RT_INFO->input_fd, (struct sockaddr *)&remote, |
---|
119 | (socklen_t)sizeof(struct sockaddr)) == -1) { |
---|
120 | trace_set_err(libtrace, TRACE_ERR_INIT_FAILED, |
---|
121 | "Could not connect to host %s on port %d", |
---|
122 | RT_INFO->hostname, RT_INFO->port); |
---|
123 | return -1; |
---|
124 | } |
---|
125 | |
---|
126 | |
---|
127 | #if 0 |
---|
128 | oldflags = fcntl(RT_INFO->input_fd, F_GETFL, 0); |
---|
129 | if (oldflags == -1) { |
---|
130 | trace_set_err(libtrace, errno, |
---|
131 | "Could not get fd flags from fd %d\n", |
---|
132 | RT_INFO->input_fd); |
---|
133 | return -1; |
---|
134 | } |
---|
135 | oldflags |= O_NONBLOCK; |
---|
136 | if (fcntl(RT_INFO->input_fd, F_SETFL, oldflags) == -1) { |
---|
137 | trace_set_err(libtrace, errno, |
---|
138 | "Could not set fd flags for fd %d\n", |
---|
139 | RT_INFO->input_fd); |
---|
140 | return -1; |
---|
141 | } |
---|
142 | #endif |
---|
143 | |
---|
144 | |
---|
145 | /* We are connected, now receive message from server */ |
---|
146 | |
---|
147 | if (recv(RT_INFO->input_fd, (void*)&connect_msg, sizeof(rt_header_t), 0) != sizeof(rt_header_t) ) { |
---|
148 | trace_set_err(libtrace, TRACE_ERR_INIT_FAILED, |
---|
149 | "Could not receive connection message from %s", |
---|
150 | RT_INFO->hostname); |
---|
151 | return -1; |
---|
152 | } |
---|
153 | |
---|
154 | switch (connect_msg.type) { |
---|
155 | case TRACE_RT_DENY_CONN: |
---|
156 | |
---|
157 | if (recv(RT_INFO->input_fd, (void*)&deny_hdr, |
---|
158 | sizeof(rt_deny_conn_t), |
---|
159 | 0) != sizeof(rt_deny_conn_t)) { |
---|
160 | reason = 0; |
---|
161 | } |
---|
162 | reason = deny_hdr.reason; |
---|
163 | trace_set_err(libtrace, TRACE_ERR_INIT_FAILED, |
---|
164 | "Connection attempt is denied: %s", |
---|
165 | rt_deny_reason(reason)); |
---|
166 | return -1; |
---|
167 | case TRACE_RT_HELLO: |
---|
168 | /* do something with options */ |
---|
169 | if (recv(RT_INFO->input_fd, (void*)&hello_opts, |
---|
170 | sizeof(rt_hello_t), 0) |
---|
171 | != sizeof(rt_hello_t)) { |
---|
172 | trace_set_err(libtrace, TRACE_ERR_INIT_FAILED, |
---|
173 | "Failed to receive TRACE_RT_HELLO options"); |
---|
174 | return -1; |
---|
175 | } |
---|
176 | RT_INFO->reliable = hello_opts.reliable; |
---|
177 | |
---|
178 | return 0; |
---|
179 | default: |
---|
180 | trace_set_err(libtrace, TRACE_ERR_INIT_FAILED, |
---|
181 | "Unknown message type received: %d", |
---|
182 | connect_msg.type); |
---|
183 | return -1; |
---|
184 | } |
---|
185 | trace_set_err(libtrace, TRACE_ERR_INIT_FAILED, |
---|
186 | "Somehow you managed to reach this unreachable code"); |
---|
187 | return -1; |
---|
188 | } |
---|
189 | |
---|
190 | |
---|
191 | static int rt_init_input(libtrace_t *libtrace) { |
---|
192 | char *scan; |
---|
193 | char *uridata = libtrace->uridata; |
---|
194 | libtrace->format_data = malloc(sizeof(struct rt_format_data_t)); |
---|
195 | |
---|
196 | RT_INFO->dummy_duck = NULL; |
---|
197 | RT_INFO->dummy_erf = NULL; |
---|
198 | RT_INFO->dummy_pcap = NULL; |
---|
199 | RT_INFO->dummy_linux = NULL; |
---|
200 | RT_INFO->pkt_buffer = NULL; |
---|
201 | RT_INFO->buf_current = NULL; |
---|
202 | RT_INFO->buf_filled = 0; |
---|
203 | |
---|
204 | if (strlen(uridata) == 0) { |
---|
205 | RT_INFO->hostname = |
---|
206 | strdup("localhost"); |
---|
207 | RT_INFO->port = |
---|
208 | COLLECTOR_PORT; |
---|
209 | } else { |
---|
210 | if ((scan = strchr(uridata,':')) == NULL) { |
---|
211 | RT_INFO->hostname = |
---|
212 | strdup(uridata); |
---|
213 | RT_INFO->port = |
---|
214 | COLLECTOR_PORT; |
---|
215 | } else { |
---|
216 | RT_INFO->hostname = |
---|
217 | (char *)strndup(uridata, |
---|
218 | (size_t)(scan - uridata)); |
---|
219 | RT_INFO->port = |
---|
220 | atoi(++scan); |
---|
221 | } |
---|
222 | } |
---|
223 | |
---|
224 | return 0; |
---|
225 | } |
---|
226 | |
---|
227 | static int rt_start_input(libtrace_t *libtrace) { |
---|
228 | rt_header_t start_msg; |
---|
229 | |
---|
230 | start_msg.type = TRACE_RT_START; |
---|
231 | start_msg.length = 0; |
---|
232 | |
---|
233 | if (rt_connect(libtrace) == -1) |
---|
234 | return -1; |
---|
235 | |
---|
236 | /* Need to send start message to server */ |
---|
237 | if (send(RT_INFO->input_fd, (void*)&start_msg, sizeof(rt_header_t) + |
---|
238 | start_msg.length, 0) != sizeof(rt_header_t)) { |
---|
239 | printf("Failed to send start message to server\n"); |
---|
240 | return -1; |
---|
241 | } |
---|
242 | RT_INFO->rt_hdr.type = TRACE_RT_LAST; |
---|
243 | |
---|
244 | return 0; |
---|
245 | } |
---|
246 | |
---|
247 | static int rt_pause_input(libtrace_t *libtrace) { |
---|
248 | rt_header_t close_msg; |
---|
249 | |
---|
250 | close_msg.type = TRACE_RT_CLOSE; |
---|
251 | close_msg.length = 0; |
---|
252 | |
---|
253 | /* Send a close message to the server */ |
---|
254 | if (send(RT_INFO->input_fd, (void*)&close_msg, sizeof(rt_header_t) + |
---|
255 | close_msg.length, 0) != (int)sizeof(rt_header_t) |
---|
256 | + close_msg.length) { |
---|
257 | printf("Failed to send close message to server\n"); |
---|
258 | |
---|
259 | } |
---|
260 | |
---|
261 | close(RT_INFO->input_fd); |
---|
262 | return 0; |
---|
263 | } |
---|
264 | |
---|
265 | static int rt_fin_input(libtrace_t *libtrace) { |
---|
266 | if (RT_INFO->dummy_duck) |
---|
267 | trace_destroy_dead(RT_INFO->dummy_duck); |
---|
268 | |
---|
269 | if (RT_INFO->dummy_erf) |
---|
270 | trace_destroy_dead(RT_INFO->dummy_erf); |
---|
271 | |
---|
272 | if (RT_INFO->dummy_pcap) |
---|
273 | trace_destroy_dead(RT_INFO->dummy_pcap); |
---|
274 | |
---|
275 | if (RT_INFO->dummy_linux) |
---|
276 | trace_destroy_dead(RT_INFO->dummy_linux); |
---|
277 | free(libtrace->format_data); |
---|
278 | return 0; |
---|
279 | } |
---|
280 | |
---|
281 | #define RT_BUF_SIZE 4000U |
---|
282 | |
---|
283 | static int rt_read(libtrace_t *libtrace, void **buffer, size_t len, int block) |
---|
284 | { |
---|
285 | int numbytes; |
---|
286 | |
---|
287 | assert(len <= RT_BUF_SIZE); |
---|
288 | |
---|
289 | if (!RT_INFO->pkt_buffer) { |
---|
290 | RT_INFO->pkt_buffer = (char*)malloc((size_t)RT_BUF_SIZE); |
---|
291 | RT_INFO->buf_current = RT_INFO->pkt_buffer; |
---|
292 | RT_INFO->buf_filled = 0; |
---|
293 | } |
---|
294 | |
---|
295 | #ifndef MSG_DONTWAIT |
---|
296 | #define MSG_DONTWAIT 0 |
---|
297 | #endif |
---|
298 | |
---|
299 | if (block) |
---|
300 | block=0; |
---|
301 | else |
---|
302 | block=MSG_DONTWAIT; |
---|
303 | |
---|
304 | |
---|
305 | if (len > RT_INFO->buf_filled) { |
---|
306 | memcpy(RT_INFO->pkt_buffer, RT_INFO->buf_current, |
---|
307 | RT_INFO->buf_filled); |
---|
308 | RT_INFO->buf_current = RT_INFO->pkt_buffer; |
---|
309 | #ifndef MSG_NOSIGNAL |
---|
310 | # define MSG_NOSIGNAL 0 |
---|
311 | #endif |
---|
312 | while (len > RT_INFO->buf_filled) { |
---|
313 | if ((numbytes = recv(RT_INFO->input_fd, |
---|
314 | RT_INFO->buf_current + |
---|
315 | RT_INFO->buf_filled, |
---|
316 | RT_BUF_SIZE-RT_INFO->buf_filled, |
---|
317 | MSG_NOSIGNAL|block)) <= 0) { |
---|
318 | if (numbytes == 0) { |
---|
319 | trace_set_err(libtrace, TRACE_ERR_BAD_PACKET, |
---|
320 | "No data received"); |
---|
321 | return -1; |
---|
322 | } |
---|
323 | |
---|
324 | if (errno == EINTR) { |
---|
325 | /* ignore EINTR in case |
---|
326 | * a caller is using signals |
---|
327 | */ |
---|
328 | continue; |
---|
329 | } |
---|
330 | if (errno == EAGAIN) { |
---|
331 | trace_set_err(libtrace, |
---|
332 | EAGAIN, |
---|
333 | "EAGAIN"); |
---|
334 | return -1; |
---|
335 | } |
---|
336 | |
---|
337 | perror("recv"); |
---|
338 | trace_set_err(libtrace, errno, |
---|
339 | "Failed to read data into rt recv buffer"); |
---|
340 | return -1; |
---|
341 | } |
---|
342 | /* |
---|
343 | buf_ptr = RT_INFO->pkt_buffer; |
---|
344 | for (i = 0; i < RT_BUF_SIZE ; i++) { |
---|
345 | |
---|
346 | printf("%02x", (unsigned char)*buf_ptr); |
---|
347 | buf_ptr ++; |
---|
348 | } |
---|
349 | printf("\n"); |
---|
350 | */ |
---|
351 | RT_INFO->buf_filled+=numbytes; |
---|
352 | } |
---|
353 | |
---|
354 | } |
---|
355 | *buffer = RT_INFO->buf_current; |
---|
356 | RT_INFO->buf_current += len; |
---|
357 | RT_INFO->buf_filled -= len; |
---|
358 | return len; |
---|
359 | } |
---|
360 | |
---|
361 | |
---|
362 | static int rt_set_format(libtrace_t *libtrace, libtrace_packet_t *packet) |
---|
363 | { |
---|
364 | |
---|
365 | /* Try to minimize the number of corrupt packets that slip through |
---|
366 | * while making it easy to identify new pcap DLTs */ |
---|
367 | if (packet->type > TRACE_RT_DATA_DLT && |
---|
368 | packet->type < TRACE_RT_DATA_DLT_END) { |
---|
369 | if (!RT_INFO->dummy_pcap) { |
---|
370 | RT_INFO->dummy_pcap = trace_create_dead("pcap:-"); |
---|
371 | } |
---|
372 | packet->trace = RT_INFO->dummy_pcap; |
---|
373 | return 0; |
---|
374 | } |
---|
375 | |
---|
376 | switch (packet->type) { |
---|
377 | case TRACE_RT_DUCK_2_4: |
---|
378 | case TRACE_RT_DUCK_2_5: |
---|
379 | if (!RT_INFO->dummy_duck) { |
---|
380 | RT_INFO->dummy_duck = trace_create_dead("duck:dummy"); |
---|
381 | } |
---|
382 | packet->trace = RT_INFO->dummy_duck; |
---|
383 | break; |
---|
384 | case TRACE_RT_DATA_ERF: |
---|
385 | if (!RT_INFO->dummy_erf) { |
---|
386 | RT_INFO->dummy_erf = trace_create_dead("erf:-"); |
---|
387 | } |
---|
388 | packet->trace = RT_INFO->dummy_erf; |
---|
389 | break; |
---|
390 | case TRACE_RT_DATA_LINUX_NATIVE: |
---|
391 | if (!RT_INFO->dummy_linux) { |
---|
392 | RT_INFO->dummy_linux = trace_create_dead("int:"); |
---|
393 | } |
---|
394 | packet->trace = RT_INFO->dummy_linux; |
---|
395 | break; |
---|
396 | case TRACE_RT_DATA_LEGACY_ETH: |
---|
397 | case TRACE_RT_DATA_LEGACY_ATM: |
---|
398 | case TRACE_RT_DATA_LEGACY_POS: |
---|
399 | printf("Sending legacy over RT is currently not supported\n"); |
---|
400 | trace_set_err(libtrace, TRACE_ERR_BAD_PACKET, "Legacy packet cannot be sent over rt"); |
---|
401 | return -1; |
---|
402 | default: |
---|
403 | printf("Unrecognised format: %u\n", packet->type); |
---|
404 | trace_set_err(libtrace, TRACE_ERR_BAD_PACKET, "Unrecognised packet format"); |
---|
405 | return -1; |
---|
406 | } |
---|
407 | return 0; /* success */ |
---|
408 | } |
---|
409 | |
---|
410 | static void rt_set_payload(libtrace_packet_t *packet) { |
---|
411 | dag_record_t *erfptr; |
---|
412 | |
---|
413 | switch (packet->type) { |
---|
414 | case TRACE_RT_DATA_ERF: |
---|
415 | erfptr = (dag_record_t *)packet->header; |
---|
416 | |
---|
417 | if (erfptr->flags.rxerror == 1) { |
---|
418 | packet->payload = NULL; |
---|
419 | break; |
---|
420 | } |
---|
421 | /* else drop into the default case */ |
---|
422 | default: |
---|
423 | packet->payload = (char *)packet->buffer + |
---|
424 | trace_get_framing_length(packet); |
---|
425 | break; |
---|
426 | } |
---|
427 | } |
---|
428 | |
---|
429 | static int rt_send_ack(libtrace_t *libtrace, |
---|
430 | uint32_t seqno) { |
---|
431 | |
---|
432 | static char *ack_buffer = 0; |
---|
433 | char *buf_ptr; |
---|
434 | int numbytes = 0; |
---|
435 | size_t to_write = 0; |
---|
436 | rt_header_t *hdr; |
---|
437 | rt_ack_t *ack_hdr; |
---|
438 | |
---|
439 | if (!ack_buffer) { |
---|
440 | ack_buffer = (char*)malloc(sizeof(rt_header_t) |
---|
441 | + sizeof(rt_ack_t)); |
---|
442 | } |
---|
443 | |
---|
444 | hdr = (rt_header_t *) ack_buffer; |
---|
445 | ack_hdr = (rt_ack_t *) (ack_buffer + sizeof(rt_header_t)); |
---|
446 | |
---|
447 | hdr->type = TRACE_RT_ACK; |
---|
448 | hdr->length = sizeof(rt_ack_t); |
---|
449 | |
---|
450 | ack_hdr->sequence = seqno; |
---|
451 | |
---|
452 | to_write = hdr->length + sizeof(rt_header_t); |
---|
453 | buf_ptr = ack_buffer; |
---|
454 | |
---|
455 | while (to_write > 0) { |
---|
456 | numbytes = send(RT_INFO->input_fd, buf_ptr, to_write, 0); |
---|
457 | if (numbytes == -1) { |
---|
458 | if (errno == EINTR || errno == EAGAIN) { |
---|
459 | continue; |
---|
460 | } |
---|
461 | else { |
---|
462 | printf("Error sending ack\n"); |
---|
463 | perror("send"); |
---|
464 | trace_set_err(libtrace, TRACE_ERR_BAD_PACKET, |
---|
465 | "Error sending ack"); |
---|
466 | return -1; |
---|
467 | } |
---|
468 | } |
---|
469 | to_write = to_write - numbytes; |
---|
470 | buf_ptr = buf_ptr + to_write; |
---|
471 | |
---|
472 | } |
---|
473 | |
---|
474 | return 1; |
---|
475 | } |
---|
476 | |
---|
477 | |
---|
478 | static int rt_read_packet_versatile(libtrace_t *libtrace, |
---|
479 | libtrace_packet_t *packet,int blocking) { |
---|
480 | rt_header_t *pkt_hdr = NULL; |
---|
481 | void *void_hdr; |
---|
482 | |
---|
483 | if (packet->buf_control == TRACE_CTRL_PACKET) { |
---|
484 | packet->buf_control = TRACE_CTRL_EXTERNAL; |
---|
485 | free(packet->buffer); |
---|
486 | packet->buffer = NULL; |
---|
487 | } |
---|
488 | |
---|
489 | /* RT_LAST means that the next bytes received should be a |
---|
490 | * rt header - I know it's hax and maybe I'll fix it later on */ |
---|
491 | if (RT_INFO->rt_hdr.type == TRACE_RT_LAST) { |
---|
492 | void_hdr = (void *)pkt_hdr; |
---|
493 | /* FIXME: Better error handling required */ |
---|
494 | if (rt_read(libtrace, &void_hdr, |
---|
495 | sizeof(rt_header_t),blocking) != |
---|
496 | sizeof(rt_header_t)) { |
---|
497 | return -1; |
---|
498 | } |
---|
499 | pkt_hdr = (rt_header_t *)void_hdr; |
---|
500 | |
---|
501 | /* Need to salvage these in case the next rt_read overwrites |
---|
502 | * the buffer they came from! */ |
---|
503 | RT_INFO->rt_hdr.type = pkt_hdr->type; |
---|
504 | RT_INFO->rt_hdr.length = pkt_hdr->length; |
---|
505 | RT_INFO->rt_hdr.sequence = pkt_hdr->sequence; |
---|
506 | } |
---|
507 | packet->type = RT_INFO->rt_hdr.type; |
---|
508 | |
---|
509 | |
---|
510 | if (packet->type >= TRACE_RT_DATA_SIMPLE) { |
---|
511 | if (rt_read(libtrace, |
---|
512 | &packet->buffer, |
---|
513 | (size_t)RT_INFO->rt_hdr.length, |
---|
514 | blocking) != RT_INFO->rt_hdr.length) { |
---|
515 | return -1; |
---|
516 | } |
---|
517 | packet->header = packet->buffer; |
---|
518 | |
---|
519 | if (RT_INFO->reliable > 0) { |
---|
520 | if (rt_send_ack(libtrace, RT_INFO->rt_hdr.sequence) |
---|
521 | == -1) |
---|
522 | { |
---|
523 | return -1; |
---|
524 | } |
---|
525 | } |
---|
526 | |
---|
527 | |
---|
528 | if (rt_set_format(libtrace, packet) < 0) { |
---|
529 | return -1; |
---|
530 | } |
---|
531 | rt_set_payload(packet); |
---|
532 | } else { |
---|
533 | switch(packet->type) { |
---|
534 | case TRACE_RT_STATUS: |
---|
535 | case TRACE_RT_METADATA: |
---|
536 | if (rt_read(libtrace, &packet->buffer, |
---|
537 | (size_t)RT_INFO->rt_hdr.length, |
---|
538 | blocking) != |
---|
539 | RT_INFO->rt_hdr.length) { |
---|
540 | return -1; |
---|
541 | } |
---|
542 | packet->header = 0; |
---|
543 | packet->payload = packet->buffer; |
---|
544 | break; |
---|
545 | case TRACE_RT_DUCK_2_4: |
---|
546 | case TRACE_RT_DUCK_2_5: |
---|
547 | if (rt_read(libtrace, &packet->buffer, |
---|
548 | (size_t)RT_INFO->rt_hdr.length, |
---|
549 | blocking) != |
---|
550 | RT_INFO->rt_hdr.length) { |
---|
551 | return -1; |
---|
552 | } |
---|
553 | if (rt_set_format(libtrace, packet) < 0) { |
---|
554 | return -1; |
---|
555 | } |
---|
556 | packet->header = 0; |
---|
557 | packet->payload = packet->buffer; |
---|
558 | break; |
---|
559 | case TRACE_RT_END_DATA: |
---|
560 | break; |
---|
561 | case TRACE_RT_PAUSE_ACK: |
---|
562 | /* FIXME: Do something useful */ |
---|
563 | break; |
---|
564 | case TRACE_RT_OPTION: |
---|
565 | /* FIXME: Do something useful here as well */ |
---|
566 | break; |
---|
567 | case TRACE_RT_KEYCHANGE: |
---|
568 | break; |
---|
569 | case TRACE_RT_LOSTCONN: |
---|
570 | break; |
---|
571 | case TRACE_RT_SERVERSTART: |
---|
572 | break; |
---|
573 | case TRACE_RT_CLIENTDROP: |
---|
574 | break; |
---|
575 | default: |
---|
576 | printf("Bad rt type for client receipt: %d\n", |
---|
577 | packet->type); |
---|
578 | return -1; |
---|
579 | } |
---|
580 | } |
---|
581 | /* Return the number of bytes read from the stream */ |
---|
582 | RT_INFO->rt_hdr.type = TRACE_RT_LAST; |
---|
583 | return RT_INFO->rt_hdr.length + sizeof(rt_header_t); |
---|
584 | } |
---|
585 | |
---|
586 | static int rt_read_packet(libtrace_t *libtrace, |
---|
587 | libtrace_packet_t *packet) { |
---|
588 | return rt_read_packet_versatile(libtrace,packet,1); |
---|
589 | } |
---|
590 | |
---|
591 | |
---|
592 | static int rt_get_capture_length(const libtrace_packet_t *packet) { |
---|
593 | rt_metadata_t *rt_md_hdr; |
---|
594 | switch (packet->type) { |
---|
595 | case TRACE_RT_STATUS: |
---|
596 | return sizeof(rt_status_t); |
---|
597 | case TRACE_RT_HELLO: |
---|
598 | return sizeof(rt_hello_t); |
---|
599 | case TRACE_RT_START: |
---|
600 | return 0; |
---|
601 | case TRACE_RT_ACK: |
---|
602 | return sizeof(rt_ack_t); |
---|
603 | case TRACE_RT_END_DATA: |
---|
604 | return 0; |
---|
605 | case TRACE_RT_CLOSE: |
---|
606 | return 0; |
---|
607 | case TRACE_RT_DENY_CONN: |
---|
608 | return sizeof(rt_deny_conn_t); |
---|
609 | case TRACE_RT_PAUSE: |
---|
610 | return 0; |
---|
611 | case TRACE_RT_PAUSE_ACK: |
---|
612 | return 0; |
---|
613 | case TRACE_RT_OPTION: |
---|
614 | return 0; /* FIXME */ |
---|
615 | case TRACE_RT_KEYCHANGE: |
---|
616 | return 0; |
---|
617 | case TRACE_RT_LOSTCONN: |
---|
618 | return 0; |
---|
619 | case TRACE_RT_SERVERSTART: |
---|
620 | return 0; |
---|
621 | case TRACE_RT_CLIENTDROP: |
---|
622 | return 0; |
---|
623 | case TRACE_RT_METADATA: |
---|
624 | /* This is a little trickier to work out */ |
---|
625 | rt_md_hdr = (rt_metadata_t *)packet->buffer; |
---|
626 | return rt_md_hdr->label_len + rt_md_hdr->value_len + |
---|
627 | sizeof(rt_metadata_t); |
---|
628 | default: |
---|
629 | printf("Unknown type: %d\n", packet->type); |
---|
630 | |
---|
631 | } |
---|
632 | return 0; |
---|
633 | } |
---|
634 | |
---|
635 | static int rt_get_wire_length(UNUSED const libtrace_packet_t *packet) { |
---|
636 | return 0; |
---|
637 | } |
---|
638 | |
---|
639 | static int rt_get_framing_length(UNUSED const libtrace_packet_t *packet) { |
---|
640 | return 0; |
---|
641 | } |
---|
642 | |
---|
643 | static int rt_get_fd(const libtrace_t *trace) { |
---|
644 | return ((struct rt_format_data_t *)trace->format_data)->input_fd; |
---|
645 | } |
---|
646 | |
---|
647 | static libtrace_eventobj_t trace_event_rt(libtrace_t *trace, |
---|
648 | libtrace_packet_t *packet) |
---|
649 | { |
---|
650 | libtrace_eventobj_t event = {0,0,0.0,0}; |
---|
651 | libtrace_err_t read_err; |
---|
652 | |
---|
653 | assert(trace); |
---|
654 | assert(packet); |
---|
655 | |
---|
656 | if (trace->format->get_fd) { |
---|
657 | event.fd = trace->format->get_fd(trace); |
---|
658 | } else { |
---|
659 | event.fd = 0; |
---|
660 | } |
---|
661 | |
---|
662 | event.size = rt_read_packet_versatile(trace, packet, 0); |
---|
663 | if (event.size == -1) { |
---|
664 | read_err = trace_get_err(trace); |
---|
665 | if (read_err.err_num == EAGAIN) { |
---|
666 | event.type = TRACE_EVENT_IOWAIT; |
---|
667 | } |
---|
668 | else { |
---|
669 | event.type = TRACE_EVENT_PACKET; |
---|
670 | } |
---|
671 | } else if (event.size == 0) { |
---|
672 | if (packet->type == TRACE_RT_END_DATA) |
---|
673 | event.type = TRACE_EVENT_TERMINATE; |
---|
674 | else |
---|
675 | event.type = TRACE_EVENT_PACKET; |
---|
676 | |
---|
677 | } |
---|
678 | else { |
---|
679 | event.type = TRACE_EVENT_PACKET; |
---|
680 | } |
---|
681 | |
---|
682 | |
---|
683 | return event; |
---|
684 | } |
---|
685 | |
---|
686 | static void rt_help(void) { |
---|
687 | printf("rt format module\n"); |
---|
688 | printf("Supported input URIs:\n"); |
---|
689 | printf("\trt:hostname:port\n"); |
---|
690 | printf("\trt:hostname (connects on default port)\n"); |
---|
691 | printf("\n"); |
---|
692 | printf("\te.g.: rt:localhost\n"); |
---|
693 | printf("\te.g.: rt:localhost:32500\n"); |
---|
694 | printf("\n"); |
---|
695 | |
---|
696 | } |
---|
697 | |
---|
698 | |
---|
699 | static struct libtrace_format_t rt = { |
---|
700 | "rt", |
---|
701 | "$Id$", |
---|
702 | TRACE_FORMAT_RT, |
---|
703 | rt_init_input, /* init_input */ |
---|
704 | NULL, /* config_input */ |
---|
705 | rt_start_input, /* start_input */ |
---|
706 | rt_pause_input, /* pause */ |
---|
707 | NULL, /* init_output */ |
---|
708 | NULL, /* config_output */ |
---|
709 | NULL, /* start_output */ |
---|
710 | rt_fin_input, /* fin_input */ |
---|
711 | NULL, /* fin_output */ |
---|
712 | rt_read_packet, /* read_packet */ |
---|
713 | NULL, /* fin_packet */ |
---|
714 | NULL, /* write_packet */ |
---|
715 | NULL, /* get_link_type */ |
---|
716 | NULL, /* get_direction */ |
---|
717 | NULL, /* set_direction */ |
---|
718 | NULL, /* get_erf_timestamp */ |
---|
719 | NULL, /* get_timeval */ |
---|
720 | NULL, /* get_seconds */ |
---|
721 | NULL, /* seek_erf */ |
---|
722 | NULL, /* seek_timeval */ |
---|
723 | NULL, /* seek_seconds */ |
---|
724 | rt_get_capture_length, /* get_capture_length */ |
---|
725 | rt_get_wire_length, /* get_wire_length */ |
---|
726 | rt_get_framing_length, /* get_framing_length */ |
---|
727 | NULL, /* set_capture_length */ |
---|
728 | NULL, /* get_received_packets */ |
---|
729 | NULL, /* get_filtered_packets */ |
---|
730 | NULL, /* get_dropped_packets */ |
---|
731 | NULL, /* get_captured_packets */ |
---|
732 | rt_get_fd, /* get_fd */ |
---|
733 | trace_event_rt, /* trace_event */ |
---|
734 | rt_help, /* help */ |
---|
735 | NULL /* next pointer */ |
---|
736 | }; |
---|
737 | |
---|
738 | void rt_constructor(void) { |
---|
739 | register_format(&rt); |
---|
740 | } |
---|