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Drop main() prototype. Syncs with NetBSD-8
[minix.git] / external / bsd / libpcap / dist / pcap-sita.c
blob22312c404a05b779790f0608e8c9ae47febf1709
1 /* $NetBSD: pcap-sita.c,v 1.3 2015/03/31 21:39:42 christos Exp $ */
2
3 /*
4 * pcap-sita.c: Packet capture interface additions for SITA ACN devices
5 *
6 * Copyright (c) 2007 Fulko Hew, SITA INC Canada, Inc <fulko.hew@sita.aero>
7 *
8 * License: BSD
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 *
14 * 1. Redistributions of source code must retain the above copyright
15 * notice, this list of conditions and the following disclaimer.
16 * 2. Redistributions in binary form must reproduce the above copyright
17 * notice, this list of conditions and the following disclaimer in
18 * the documentation and/or other materials provided with the
19 * distribution.
20 * 3. The names of the authors may not be used to endorse or promote
21 * products derived from this software without specific prior
22 * written permission.
23 *
24 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
25 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
26 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
27 */
28
29 #include <sys/cdefs.h>
30 __RCSID("$NetBSD: pcap-sita.c,v 1.3 2015/03/31 21:39:42 christos Exp $");
31
32 #ifdef HAVE_CONFIG_H
33 #include "config.h"
34 #endif
35
36 #include <stdio.h>
37 #include <string.h>
38 #include <stdlib.h>
39 #include <unistd.h>
40 #include <fcntl.h>
41 #include <errno.h>
42 #include <sys/time.h>
43 #include <sys/socket.h>
44 #include <netinet/in.h>
45 #include <arpa/inet.h>
46 #include "pcap-int.h"
47
48 #include "pcap-sita.h"
49
50 /* non-configureable manifests follow */
51
52 #define IOP_SNIFFER_PORT 49152 /* TCP port on the IOP used for 'distributed pcap' usage */
53 #define MAX_LINE_SIZE 255 /* max size of a buffer/line in /etc/hosts we allow */
54 #define MAX_CHASSIS 8 /* number of chassis in an ACN site */
55 #define MAX_GEOSLOT 8 /* max number of access units in an ACN site */
56
57 #define FIND 0
58 #define LIVE 1
59
60 typedef struct iface {
61 struct iface *next; /* a pointer to the next interface */
62 char *name; /* this interface's name */
63 char *IOPname; /* this interface's name on an IOP */
64 uint32_t iftype; /* the type of interface (DLT values) */
65 } iface_t;
66
67 typedef struct unit {
68 char *ip; /* this unit's IP address (as extracted from /etc/hosts) */
69 int fd; /* the connection to this unit (if it exists) */
70 int find_fd; /* a big kludge to avoid my programming limitations since I could have this unit open for findalldevs purposes */
71 int first_time; /* 0 = just opened via acn_open_live(), ie. the first time, NZ = nth time */
72 struct sockaddr_in *serv_addr; /* the address control block for comms to this unit */
73 int chassis;
74 int geoslot;
75 iface_t *iface; /* a pointer to a linked list of interface structures */
76 char *imsg; /* a pointer to an inbound message */
77 int len; /* the current size of the inbound message */
78 } unit_t;
79
80 static unit_t units[MAX_CHASSIS+1][MAX_GEOSLOT+1]; /* we use indexes of 1 through 8, but we reserve/waste index 0 */
81 static fd_set readfds; /* a place to store the file descriptors for the connections to the IOPs */
82 static int max_fs;
83
84 pcap_if_t *acn_if_list; /* pcap's list of available interfaces */
85
86 static void dump_interface_list(void) {
87 pcap_if_t *iff;
88 pcap_addr_t *addr;
89 int longest_name_len = 0;
90 char *n, *d, *f;
91 int if_number = 0;
92
93 iff = acn_if_list;
94 while (iff) {
95 if (iff->name && (strlen(iff->name) > longest_name_len)) longest_name_len = strlen(iff->name);
96 iff = iff->next;
97 }
98 iff = acn_if_list;
99 printf("Interface List:\n");
100 while (iff) {
101 n = (iff->name) ? iff->name : "";
102 d = (iff->description) ? iff->description : "";
103 f = (iff->flags == PCAP_IF_LOOPBACK) ? "L" : "";
104 printf("%3d: %*s %s '%s'\n", if_number++, longest_name_len, n, f, d);
105 addr = iff->addresses;
106 while (addr) {
107 printf("%*s ", (5 + longest_name_len), ""); /* add some indentation */
108 printf("%15s ", (addr->addr) ? inet_ntoa(((struct sockaddr_in *)addr->addr)->sin_addr) : "");
109 printf("%15s ", (addr->netmask) ? inet_ntoa(((struct sockaddr_in *)addr->netmask)->sin_addr) : "");
110 printf("%15s ", (addr->broadaddr) ? inet_ntoa(((struct sockaddr_in *)addr->broadaddr)->sin_addr) : "");
111 printf("%15s ", (addr->dstaddr) ? inet_ntoa(((struct sockaddr_in *)addr->dstaddr)->sin_addr) : "");
112 printf("\n");
113 addr = addr->next;
114 }
115 iff = iff->next;
116 }
117 }
118
119 static void dump(unsigned char *ptr, int i, int indent) {
120 fprintf(stderr, "%*s", indent, " ");
121 for (; i > 0; i--) {
122 fprintf(stderr, "%2.2x ", *ptr++);
123 }
124 fprintf(stderr, "\n");
125 }
126
127 static void dump_interface_list_p(void) {
128 pcap_if_t *iff;
129 pcap_addr_t *addr;
130 int if_number = 0;
131
132 iff = acn_if_list;
133 printf("Interface Pointer @ %p is %p:\n", &acn_if_list, iff);
134 while (iff) {
135 printf("%3d: %p %p next: %p\n", if_number++, iff->name, iff->description, iff->next);
136 dump((unsigned char *)iff, sizeof(pcap_if_t), 5);
137 addr = iff->addresses;
138 while (addr) {
139 printf(" %p %p %p %p, next: %p\n", addr->addr, addr->netmask, addr->broadaddr, addr->dstaddr, addr->next);
140 dump((unsigned char *)addr, sizeof(pcap_addr_t), 10);
141 addr = addr->next;
142 }
143 iff = iff->next;
144 }
145 }
146
147 static void dump_unit_table(void) {
148 int chassis, geoslot;
149 iface_t *p;
150
151 printf("%c:%c %s %s\n", 'C', 'S', "fd", "IP Address");
152 for (chassis = 0; chassis <= MAX_CHASSIS; chassis++) {
153 for (geoslot = 0; geoslot <= MAX_GEOSLOT; geoslot++) {
154 if (units[chassis][geoslot].ip != NULL)
155 printf("%d:%d %2d %s\n", chassis, geoslot, units[chassis][geoslot].fd, units[chassis][geoslot].ip);
156 p = units[chassis][geoslot].iface;
157 while (p) {
158 char *n = (p->name) ? p->name : "";
159 char *i = (p->IOPname) ? p->IOPname : "";
160 p = p->next;
161 printf(" %12s -> %12s\n", i, n);
162 }
163 }
164 }
165 }
166
167 static int find_unit_by_fd(int fd, int *chassis, int *geoslot, unit_t **unit_ptr) {
168 int c, s;
169
170 for (c = 0; c <= MAX_CHASSIS; c++) {
171 for (s = 0; s <= MAX_GEOSLOT; s++) {
172 if (units[c][s].fd == fd || units[c][s].find_fd == fd) {
173 if (chassis) *chassis = c;
174 if (geoslot) *geoslot = s;
175 if (unit_ptr) *unit_ptr = &units[c][s];
176 return 1;
177 }
178 }
179 }
180 return 0;
181 }
182
183 static int read_client_nbytes(int fd, int count, unsigned char *buf) {
184 unit_t *u;
185 int chassis, geoslot;
186 int len;
187
188 find_unit_by_fd(fd, &chassis, &geoslot, &u);
189 while (count) {
190 if ((len = recv(fd, buf, count, 0)) <= 0) return -1; /* read in whatever data was sent to us */
191 count -= len;
192 buf += len;
193 } /* till we have everything we are looking for */
194 return 0;
195 }
196
197 static void empty_unit_iface(unit_t *u) {
198 iface_t *p, *cur;
199
200 cur = u->iface;
201 while (cur) { /* loop over all the interface entries */
202 if (cur->name) free(cur->name); /* throwing away the contents if they exist */
203 if (cur->IOPname) free(cur->IOPname);
204 p = cur->next;
205 free(cur); /* then throw away the structure itself */
206 cur = p;
207 }
208 u->iface = 0; /* and finally remember that there are no remaining structure */
209 }
210
211 static void empty_unit(int chassis, int geoslot) {
212 unit_t *u = &units[chassis][geoslot];
213
214 empty_unit_iface(u);
215 if (u->imsg) { /* then if an inbound message buffer exists */
216 u->imsg = (char *)realloc(u->imsg, 1); /* and re-allocate the old large buffer into a new small one */
217 if (u->imsg == NULL) { /* oops, realloc call failed */
218 fprintf(stderr, "Warning...call to realloc() failed, value of errno is %d\n", errno);
219
220 }
221 }
222
223 static void empty_unit_table(void) {
224 int chassis, geoslot;
225
226 for (chassis = 0; chassis <= MAX_CHASSIS; chassis++) {
227 for (geoslot = 0; geoslot <= MAX_GEOSLOT; geoslot++) {
228 if (units[chassis][geoslot].ip != NULL) {
229 free(units[chassis][geoslot].ip); /* get rid of the malloc'ed space that holds the IP address */
230 units[chassis][geoslot].ip = 0; /* then set the pointer to NULL */
231 }
232 empty_unit(chassis, geoslot);
233 }
234 }
235 }
236
237 static char *find_nth_interface_name(int n) {
238 int chassis, geoslot;
239 iface_t *p;
240 char *last_name = 0;
241
242 if (n < 0) n = 0; /* ensure we are working with a valid number */
243 for (chassis = 0; chassis <= MAX_CHASSIS; chassis++) { /* scan the table... */
244 for (geoslot = 0; geoslot <= MAX_GEOSLOT; geoslot++) {
245 if (units[chassis][geoslot].ip != NULL) {
246 p = units[chassis][geoslot].iface;
247 while (p) { /* and all interfaces... */
248 if (p->IOPname) last_name = p->name; /* remembering the last name found */
249 if (n-- == 0) return last_name; /* and if we hit the instance requested */
250 p = p->next;
251 }
252 }
253 }
254 }
255 /* if we couldn't fine the selected entry */
256 if (last_name) return last_name; /* ... but we did have at least one entry... return the last entry found */
257 return ""; /* ... but if there wasn't any entry... return an empty string instead */
258 }
259
260 int acn_parse_hosts_file(char *errbuf) { /* returns: -1 = error, 0 = OK */
261 FILE *fp;
262 char buf[MAX_LINE_SIZE];
263 char *ptr, *ptr2;
264 int pos;
265 int chassis, geoslot;
266 unit_t *u;
267
268 empty_unit_table();
269 if ((fp = fopen("/etc/hosts", "r")) == NULL) { /* try to open the hosts file and if it fails */
270 snprintf(errbuf, PCAP_ERRBUF_SIZE, "Cannot open '/etc/hosts' for reading."); /* return the nohostsfile error response */
271 return -1;
272 }
273 while (fgets(buf, MAX_LINE_SIZE-1, fp)) { /* while looping over the file */
274
275 pos = strcspn(buf, "#\n\r"); /* find the first comment character or EOL */
276 *(buf + pos) = '\0'; /* and clobber it and anything that follows it */
277
278 pos = strspn(buf, " \t"); /* then find the first non-white space */
279 if (pos == strlen(buf)) /* if there is nothing but white space on the line */
280 continue; /* ignore that empty line */
281 ptr = buf + pos; /* and skip over any of that leading whitespace */
282
283 if ((ptr2 = strstr(ptr, "_I_")) == NULL) /* skip any lines that don't have names that look like they belong to IOPs */
284 continue;
285 if (*(ptr2 + 4) != '_') /* and skip other lines that have names that don't look like ACN components */
286 continue;
287 *(ptr + strcspn(ptr, " \t")) = '\0'; /* null terminate the IP address so its a standalone string */
288
289 chassis = *(ptr2 + 3) - '0'; /* extract the chassis number */
290 geoslot = *(ptr2 + 5) - '0'; /* and geo-slot number */
291 if (chassis < 1 || chassis > MAX_CHASSIS ||
292 geoslot < 1 || geoslot > MAX_GEOSLOT) { /* if the chassis and/or slot numbers appear to be bad... */
293 snprintf(errbuf, PCAP_ERRBUF_SIZE, "Invalid ACN name in '/etc/hosts'."); /* warn the user */
294 continue; /* and ignore the entry */
295 }
296 if ((ptr2 = (char *)malloc(strlen(ptr) + 1)) == NULL) {
297 snprintf(errbuf, PCAP_ERRBUF_SIZE, "malloc: %s", pcap_strerror(errno));
298 continue;
299 }
300 strcpy(ptr2, ptr); /* copy the IP address into our malloc'ed memory */
301 u = &units[chassis][geoslot];
302 u->ip = ptr2; /* and remember the whole shebang */
303 u->chassis = chassis;
304 u->geoslot = geoslot;
305 }
306 fclose(fp);
307 if (*errbuf) return -1;
308 else return 0;
309 }
310
311 static int open_with_IOP(unit_t *u, int flag) {
312 int sockfd;
313 char *ip;
314
315 if (u->serv_addr == NULL) {
316 u->serv_addr = malloc(sizeof(struct sockaddr_in));
317
318 /* since we called malloc(), lets check to see if we actually got the memory */
319 if (u->serv_addr == NULL) { /* oops, we didn't get the memory requested */
320 fprintf(stderr, "malloc() request for u->serv_addr failed, value of errno is: %d\n", errno);
321 return 0;
322 }
323
324 }
325 ip = u->ip;
326 /* bzero() is deprecated, replaced with memset() */
327 memset((char *)u->serv_addr, 0, sizeof(struct sockaddr_in));
328 u->serv_addr->sin_family = AF_INET;
329 u->serv_addr->sin_addr.s_addr = inet_addr(ip);
330 u->serv_addr->sin_port = htons(IOP_SNIFFER_PORT);
331
332 if ((sockfd = socket(AF_INET, SOCK_STREAM, 0)) < 0) {
333 fprintf(stderr, "pcap can't open a socket for connecting to IOP at %s\n", ip);
334 return 0;
335 }
336 if (connect(sockfd, (struct sockaddr *)u->serv_addr, sizeof(struct sockaddr_in)) < 0) {
337 fprintf(stderr, "pcap can't connect to IOP at %s\n", ip);
338 return 0;
339 }
340 if (flag == LIVE) u->fd = sockfd;
341 else u->find_fd = sockfd;
342 u->first_time = 0;
343 return sockfd; /* return the non-zero file descriptor as a 'success' indicator */
344 }
345
346 static void close_with_IOP(int chassis, int geoslot, int flag) {
347 int *id;
348
349 if (flag == LIVE) id = &units[chassis][geoslot].fd;
350 else id = &units[chassis][geoslot].find_fd;
351
352 if (*id) { /* this was the last time, so... if we are connected... */
353 close(*id); /* disconnect us */
354 *id = 0; /* and forget that the descriptor exists because we are not open */
355 }
356 }
357
358 static void pcap_cleanup_acn(pcap_t *handle) {
359 int chassis, geoslot;
360 unit_t *u;
361
362 if (find_unit_by_fd(handle->fd, &chassis, &geoslot, &u) == 0)
363 return;
364 close_with_IOP(chassis, geoslot, LIVE);
365 if (u)
366 u->first_time = 0;
367 pcap_cleanup_live_common(handle);
368 }
369
370 static void send_to_fd(int fd, int len, unsigned char *str) {
371 int nwritten;
372 int chassis, geoslot;
373
374 while (len > 0) {
375 if ((nwritten = write(fd, str, len)) <= 0) {
376 find_unit_by_fd(fd, &chassis, &geoslot, NULL);
377 if (units[chassis][geoslot].fd == fd) close_with_IOP(chassis, geoslot, LIVE);
378 else if (units[chassis][geoslot].find_fd == fd) close_with_IOP(chassis, geoslot, FIND);
379 empty_unit(chassis, geoslot);
380 return;
381 }
382 len -= nwritten;
383 str += nwritten;
384 }
385 }
386
387 static void acn_freealldevs(void) {
388
389 pcap_if_t *iff, *next_iff;
390 pcap_addr_t *addr, *next_addr;
391
392 for (iff = acn_if_list; iff != NULL; iff = next_iff) {
393 next_iff = iff->next;
394 for (addr = iff->addresses; addr != NULL; addr = next_addr) {
395 next_addr = addr->next;
396 if (addr->addr) free(addr->addr);
397 if (addr->netmask) free(addr->netmask);
398 if (addr->broadaddr) free(addr->broadaddr);
399 if (addr->dstaddr) free(addr->dstaddr);
400 free(addr);
401 }
402 if (iff->name) free(iff->name);
403 if (iff->description) free(iff->description);
404 free(iff);
405 }
406 }
407
408 static void nonUnified_IOP_port_name(char *buf, size_t bufsize, const char *proto, unit_t *u) {
409
410 snprintf(buf, bufsize, "%s_%d_%d", proto, u->chassis, u->geoslot);
411 }
412
413 static void unified_IOP_port_name(char *buf, size_t bufsize, const char *proto, unit_t *u, int IOPportnum) {
414 int portnum;
415
416 portnum = ((u->chassis - 1) * 64) + ((u->geoslot - 1) * 8) + IOPportnum + 1;
417 snprintf(buf, bufsize, "%s_%d", proto, portnum);
418 }
419
420 static char *translate_IOP_to_pcap_name(unit_t *u, char *IOPname, bpf_u_int32 iftype) {
421 iface_t *iface_ptr, *iface;
422 char *name;
423 char buf[32];
424 char *proto;
425 char *port;
426 int IOPportnum = 0;
427
428 iface = malloc(sizeof(iface_t)); /* get memory for a structure */
429 if (iface == NULL) { /* oops, we didn't get the memory requested */
430 fprintf(stderr, "Error...couldn't allocate memory for interface structure...value of errno is: %d\n", errno);
431 return NULL;
432 }
433 memset((char *)iface, 0, sizeof(iface_t)); /* bzero is deprecated(), replaced with memset() */
434
435 iface->iftype = iftype; /* remember the interface type of this interface */
436
437 name = malloc(strlen(IOPname) + 1); /* get memory for the IOP's name */
438 if (name == NULL) { /* oops, we didn't get the memory requested */
439 fprintf(stderr, "Error...couldn't allocate memory for IOPname...value of errno is: %d\n", errno);
440 return NULL;
441 }
442
443 strcpy(name, IOPname); /* and copy it in */
444 iface->IOPname = name; /* and stick it into the structure */
445
446 if (strncmp(IOPname, "lo", 2) == 0) {
447 IOPportnum = atoi(&IOPname[2]);
448 switch (iftype) {
449 case DLT_EN10MB:
450 nonUnified_IOP_port_name(buf, sizeof buf, "lo", u);
451 break;
452 default:
453 unified_IOP_port_name(buf, sizeof buf, "???", u, IOPportnum);
454 break;
455 }
456 } else if (strncmp(IOPname, "eth", 3) == 0) {
457 IOPportnum = atoi(&IOPname[3]);
458 switch (iftype) {
459 case DLT_EN10MB:
460 nonUnified_IOP_port_name(buf, sizeof buf, "eth", u);
461 break;
462 default:
463 unified_IOP_port_name(buf, sizeof buf, "???", u, IOPportnum);
464 break;
465 }
466 } else if (strncmp(IOPname, "wan", 3) == 0) {
467 IOPportnum = atoi(&IOPname[3]);
468 switch (iftype) {
469 case DLT_SITA:
470 unified_IOP_port_name(buf, sizeof buf, "wan", u, IOPportnum);
471 break;
472 default:
473 unified_IOP_port_name(buf, sizeof buf, "???", u, IOPportnum);
474 break;
475 }
476 } else {
477 fprintf(stderr, "Error... invalid IOP name %s\n", IOPname);
478 return NULL;
479 }
480
481 name = malloc(strlen(buf) + 1); /* get memory for that name */
482 if (name == NULL) { /* oops, we didn't get the memory requested */
483 fprintf(stderr, "Error...couldn't allocate memory for IOP port name...value of errno is: %d\n", errno);
484 return NULL;
485 }
486
487 strcpy(name, buf); /* and copy it in */
488 iface->name = name; /* and stick it into the structure */
489
490 if (u->iface == 0) { /* if this is the first name */
491 u->iface = iface; /* stick this entry at the head of the list */
492 } else {
493 iface_ptr = u->iface;
494 while (iface_ptr->next) { /* othewise scan the list */
495 iface_ptr = iface_ptr->next; /* till we're at the last entry */
496 }
497 iface_ptr->next = iface; /* then tack this entry on the end of the list */
498 }
499 return iface->name;
500 }
501
502 static int if_sort(char *s1, char *s2) {
503 char *s1_p2, *s2_p2;
504 char str1[MAX_LINE_SIZE], str2[MAX_LINE_SIZE];
505 int s1_p1_len, s2_p1_len;
506 int retval;
507
508 if ((s1_p2 = strchr(s1, '_'))) { /* if an underscore is found... */
509 s1_p1_len = s1_p2 - s1; /* the prefix length is the difference in pointers */
510 s1_p2++; /* the suffix actually starts _after_ the underscore */
511 } else { /* otherwise... */
512 s1_p1_len = strlen(s1); /* the prefix length is the length of the string itself */
513 s1_p2 = 0; /* and there is no suffix */
514 }
515 if ((s2_p2 = strchr(s2, '_'))) { /* now do the same for the second string */
516 s2_p1_len = s2_p2 - s2;
517 s2_p2++;
518 } else {
519 s2_p1_len = strlen(s2);
520 s2_p2 = 0;
521 }
522 strncpy(str1, s1, (s1_p1_len > sizeof(str1)) ? s1_p1_len : sizeof(str1)); *(str1 + s1_p1_len) = 0;
523 strncpy(str2, s2, (s2_p1_len > sizeof(str2)) ? s2_p1_len : sizeof(str2)); *(str2 + s2_p1_len) = 0;
524 retval = strcmp(str1, str2);
525 if (retval != 0) return retval; /* if they are not identical, then we can quit now and return the indication */
526 return strcmp(s1_p2, s2_p2); /* otherwise we return the result of comparing the 2nd half of the string */
527 }
528
529 static void sort_if_table(void) {
530 pcap_if_t *p1, *p2, *prev, *temp;
531 int has_swapped;
532
533 if (!acn_if_list) return; /* nothing to do if the list is empty */
534
535 while (1) {
536 p1 = acn_if_list; /* start at the head of the list */
537 prev = 0;
538 has_swapped = 0;
539 while ((p2 = p1->next)) {
540 if (if_sort(p1->name, p2->name) > 0) {
541 if (prev) { /* we are swapping things that are _not_ at the head of the list */
542 temp = p2->next;
543 prev->next = p2;
544 p2->next = p1;
545 p1->next = temp;
546 } else { /* special treatment if we are swapping with the head of the list */
547 temp = p2->next;
548 acn_if_list= p2;
549 p2->next = p1;
550 p1->next = temp;
551 }
552 p1 = p2;
553 prev = p1;
554 has_swapped = 1;
555 }
556 prev = p1;
557 p1 = p1->next;
558 }
559 if (has_swapped == 0)
560 return;
561 }
562 return;
563 }
564
565 static int process_client_data (char *errbuf) { /* returns: -1 = error, 0 = OK */
566 int chassis, geoslot;
567 unit_t *u;
568 pcap_if_t *iff, *prev_iff;
569 pcap_addr_t *addr, *prev_addr;
570 char *ptr;
571 int address_count;
572 struct sockaddr_in *s;
573 char *newname;
574 bpf_u_int32 interfaceType;
575 unsigned char flags;
576
577 prev_iff = 0;
578 for (chassis = 0; chassis <= MAX_CHASSIS; chassis++) {
579 for (geoslot = 0; geoslot <= MAX_GEOSLOT; geoslot++) { /* now loop over all the devices */
580 u = &units[chassis][geoslot];
581 empty_unit_iface(u);
582 ptr = u->imsg; /* point to the start of the msg for this IOP */
583 while (ptr < (u->imsg + u->len)) {
584 if ((iff = malloc(sizeof(pcap_if_t))) == NULL) {
585 snprintf(errbuf, PCAP_ERRBUF_SIZE, "malloc: %s", pcap_strerror(errno));
586 return -1;
587 }
588 memset((char *)iff, 0, sizeof(pcap_if_t)); /* bzero() is deprecated, replaced with memset() */
589 if (acn_if_list == 0) acn_if_list = iff; /* remember the head of the list */
590 if (prev_iff) prev_iff->next = iff; /* insert a forward link */
591
592 if (*ptr) { /* if there is a count for the name */
593 if ((iff->name = malloc(*ptr + 1)) == NULL) { /* get that amount of space */
594 snprintf(errbuf, PCAP_ERRBUF_SIZE, "malloc: %s", pcap_strerror(errno));
595 return -1;
596 }
597 memcpy(iff->name, (ptr + 1), *ptr); /* copy the name into the malloc'ed space */
598 *(iff->name + *ptr) = 0; /* and null terminate the string */
599 ptr += *ptr; /* now move the pointer forwards by the length of the count plus the length of the string */
600 }
601 ptr++;
602
603 if (*ptr) { /* if there is a count for the description */
604 if ((iff->description = malloc(*ptr + 1)) == NULL) { /* get that amount of space */
605 snprintf(errbuf, PCAP_ERRBUF_SIZE, "malloc: %s", pcap_strerror(errno));
606 return -1;
607 }
608 memcpy(iff->description, (ptr + 1), *ptr); /* copy the name into the malloc'ed space */
609 *(iff->description + *ptr) = 0; /* and null terminate the string */
610 ptr += *ptr; /* now move the pointer forwards by the length of the count plus the length of the string */
611 }
612 ptr++;
613
614 interfaceType = ntohl(*(bpf_u_int32 *)ptr);
615 ptr += 4; /* skip over the interface type */
616
617 flags = *ptr++;
618 if (flags) iff->flags = PCAP_IF_LOOPBACK; /* if this is a loopback style interface, lets mark it as such */
619
620 address_count = *ptr++;
621
622 prev_addr = 0;
623 while (address_count--) {
624 if ((addr = malloc(sizeof(pcap_addr_t))) == NULL) {
625 snprintf(errbuf, PCAP_ERRBUF_SIZE, "malloc: %s", pcap_strerror(errno));
626 return -1;
627 }
628 + memset((char *)addr, 0, sizeof(pcap_addr_t)); /* bzero() is deprecated, replaced with memset() */
629 if (iff->addresses == 0) iff->addresses = addr;
630 if (prev_addr) prev_addr->next = addr; /* insert a forward link */
631 if (*ptr) { /* if there is a count for the address */
632 if ((s = malloc(sizeof(struct sockaddr_in))) == NULL) { /* get that amount of space */
633 snprintf(errbuf, PCAP_ERRBUF_SIZE, "malloc: %s", pcap_strerror(errno));
634 return -1;
635 }
636 memset((char *)s, 0, sizeof(struct sockaddr_in)); /* bzero() is deprecated, replaced with memset() */
637 addr->addr = (struct sockaddr *)s;
638 s->sin_family = AF_INET;
639 s->sin_addr.s_addr = *(bpf_u_int32 *)(ptr + 1); /* copy the address in */
640 ptr += *ptr; /* now move the pointer forwards according to the specified length of the address */
641 }
642 ptr++; /* then forwards one more for the 'length of the address' field */
643 if (*ptr) { /* process any netmask */
644 if ((s = malloc(sizeof(struct sockaddr_in))) == NULL) {
645 snprintf(errbuf, PCAP_ERRBUF_SIZE, "malloc: %s", pcap_strerror(errno));
646 return -1;
647 }
648 /* bzero() is deprecated, replaced with memset() */
649 memset((char *)s, 0, sizeof(struct sockaddr_in));
650
651 addr->netmask = (struct sockaddr *)s;
652 s->sin_family = AF_INET;
653 s->sin_addr.s_addr = *(bpf_u_int32*)(ptr + 1);
654 ptr += *ptr;
655 }
656 ptr++;
657 if (*ptr) { /* process any broadcast address */
658 if ((s = malloc(sizeof(struct sockaddr_in))) == NULL) {
659 snprintf(errbuf, PCAP_ERRBUF_SIZE, "malloc: %s", pcap_strerror(errno));
660 return -1;
661 }
662 /* bzero() is deprecated, replaced with memset() */
663 memset((char *)s, 0, sizeof(struct sockaddr_in));
664
665 addr->broadaddr = (struct sockaddr *)s;
666 s->sin_family = AF_INET;
667 s->sin_addr.s_addr = *(bpf_u_int32*)(ptr + 1);
668 ptr += *ptr;
669 }
670 ptr++;
671 if (*ptr) { /* process any destination address */
672 if ((s = malloc(sizeof(struct sockaddr_in))) == NULL) {
673 snprintf(errbuf, PCAP_ERRBUF_SIZE, "malloc: %s", pcap_strerror(errno));
674 return -1;
675 }
676 /* bzero() is deprecated, replaced with memset() */
677 memset((char *)s, 0, sizeof(struct sockaddr_in));
678
679 addr->dstaddr = (struct sockaddr *)s;
680 s->sin_family = AF_INET;
681 s->sin_addr.s_addr = *(bpf_u_int32*)(ptr + 1);
682 ptr += *ptr;
683 }
684 ptr++;
685 prev_addr = addr;
686 }
687 prev_iff = iff;
688
689 newname = translate_IOP_to_pcap_name(u, iff->name, interfaceType); /* add a translation entry and get a point to the mangled name */
690 if ((iff->name = realloc(iff->name, strlen(newname) + 1)) == NULL) { /* we now re-write the name stored in the interface list */
691 snprintf(errbuf, PCAP_ERRBUF_SIZE, "realloc: %s", pcap_strerror(errno));
692 return -1;
693 }
694 strcpy(iff->name, newname); /* to this new name */
695 }
696 }
697 }
698 return 0;
699 }
700
701 static int read_client_data (int fd) {
702 unsigned char buf[256];
703 int chassis, geoslot;
704 unit_t *u;
705 int len;
706
707 find_unit_by_fd(fd, &chassis, &geoslot, &u);
708
709 if ((len = recv(fd, buf, sizeof(buf), 0)) <= 0) return 0; /* read in whatever data was sent to us */
710
711 if ((u->imsg = realloc(u->imsg, (u->len + len))) == NULL) /* extend the buffer for the new data */
712 return 0;
713 memcpy((u->imsg + u->len), buf, len); /* append the new data */
714 u->len += len;
715 return 1;
716 }
717
718 static void wait_for_all_answers(void) {
719 int retval;
720 struct timeval tv;
721 int fd;
722 int chassis, geoslot;
723
724 tv.tv_sec = 2;
725 tv.tv_usec = 0;
726
727 while (1) {
728 int flag = 0;
729 fd_set working_set;
730
731 for (fd = 0; fd <= max_fs; fd++) { /* scan the list of descriptors we may be listening to */
732 if (FD_ISSET(fd, &readfds)) flag = 1; /* and see if there are any still set */
733 }
734 if (flag == 0) return; /* we are done, when they are all gone */
735
736 memcpy(&working_set, &readfds, sizeof(readfds)); /* otherwise, we still have to listen for more stuff, till we timeout */
737 retval = select(max_fs + 1, &working_set, NULL, NULL, &tv);
738 if (retval == -1) { /* an error occured !!!!! */
739 return;
740 } else if (retval == 0) { /* timeout occured, so process what we've got sofar and return */
741 printf("timeout\n");
742 return;
743 } else {
744 for (fd = 0; fd <= max_fs; fd++) { /* scan the list of things to do, and do them */
745 if (FD_ISSET(fd, &working_set)) {
746 if (read_client_data(fd) == 0) { /* if the socket has closed */
747 FD_CLR(fd, &readfds); /* and descriptors we listen to for errors */
748 find_unit_by_fd(fd, &chassis, &geoslot, NULL);
749 close_with_IOP(chassis, geoslot, FIND); /* and close out connection to him */
750 }
751 }
752 }
753 }
754 }
755 }
756
757 static char *get_error_response(int fd, char *errbuf) { /* return a pointer on error, NULL on no error */
758 char byte;
759 int len = 0;
760
761 while (1) {
762 recv(fd, &byte, 1, 0); /* read another byte in */
763 if (errbuf && (len++ < PCAP_ERRBUF_SIZE)) { /* and if there is still room in the buffer */
764 *errbuf++ = byte; /* stick it in */
765 *errbuf = '\0'; /* ensure the string is null terminated just in case we might exceed the buffer's size */
766 }
767 if (byte == '\0') {
768 if (len > 1) { return errbuf; }
769 else { return NULL; }
770 }
771 }
772 }
773
774 int acn_findalldevs(char *errbuf) { /* returns: -1 = error, 0 = OK */
775 int chassis, geoslot;
776 unit_t *u;
777
778 FD_ZERO(&readfds);
779 max_fs = 0;
780 for (chassis = 0; chassis <= MAX_CHASSIS; chassis++) {
781 for (geoslot = 0; geoslot <= MAX_GEOSLOT; geoslot++) {
782 u = &units[chassis][geoslot];
783 if (u->ip && (open_with_IOP(u, FIND))) { /* connect to the remote IOP */
784 send_to_fd(u->find_fd, 1, (unsigned char *)"\0");
785 if (get_error_response(u->find_fd, errbuf))
786 close_with_IOP(chassis, geoslot, FIND);
787 else {
788 if (u->find_fd > max_fs)
789 max_fs = u->find_fd; /* remember the highest number currently in use */
790 FD_SET(u->find_fd, &readfds); /* we are going to want to read this guy's response to */
791 u->len = 0;
792 send_to_fd(u->find_fd, 1, (unsigned char *)"Q"); /* this interface query request */
793 }
794 }
795 }
796 }
797 wait_for_all_answers();
798 if (process_client_data(errbuf))
799 return -1;
800 sort_if_table();
801 return 0;
802 }
803
804 static int pcap_stats_acn(pcap_t *handle, struct pcap_stat *ps) {
805 unsigned char buf[12];
806
807 send_to_fd(handle->fd, 1, (unsigned char *)"S"); /* send the get_stats command to the IOP */
808
809 if (read_client_nbytes(handle->fd, sizeof(buf), buf) == -1) return -1; /* try reading the required bytes */
810
811 ps->ps_recv = ntohl(*(uint32_t *)&buf[0]); /* break the buffer into its three 32 bit components */
812 ps->ps_drop = ntohl(*(uint32_t *)&buf[4]);
813 ps->ps_ifdrop = ntohl(*(uint32_t *)&buf[8]);
814
815 return 0;
816 }
817
818 static int acn_open_live(const char *name, char *errbuf, int *linktype) { /* returns 0 on error, else returns the file descriptor */
819 int chassis, geoslot;
820 unit_t *u;
821 iface_t *p;
822 pcap_if_t *alldevsp;
823
824 pcap_findalldevs_interfaces(&alldevsp, errbuf);
825 for (chassis = 0; chassis <= MAX_CHASSIS; chassis++) { /* scan the table... */
826 for (geoslot = 0; geoslot <= MAX_GEOSLOT; geoslot++) {
827 u = &units[chassis][geoslot];
828 if (u->ip != NULL) {
829 p = u->iface;
830 while (p) { /* and all interfaces... */
831 if (p->IOPname && p->name && (strcmp(p->name, name) == 0)) { /* and if we found the interface we want... */
832 *linktype = p->iftype;
833 open_with_IOP(u, LIVE); /* start a connection with that IOP */
834 send_to_fd(u->fd, strlen(p->IOPname)+1, (unsigned char *)p->IOPname); /* send the IOP's interface name, and a terminating null */
835 if (get_error_response(u->fd, errbuf)) {
836 return -1;
837 }
838 return u->fd; /* and return that open descriptor */
839 }
840 p = p->next;
841 }
842 }
843 }
844 }
845 return -1; /* if the interface wasn't found, return an error */
846 }
847
848 static void acn_start_monitor(int fd, int snaplen, int timeout, int promiscuous, int direction) {
849 unsigned char buf[8];
850 unit_t *u;
851
852 //printf("acn_start_monitor()\n"); // fulko
853 find_unit_by_fd(fd, NULL, NULL, &u);
854 if (u->first_time == 0) {
855 buf[0] = 'M';
856 *(uint32_t *)&buf[1] = htonl(snaplen);
857 buf[5] = timeout;
858 buf[6] = promiscuous;
859 buf[7] = direction;
860 //printf("acn_start_monitor() first time\n"); // fulko
861 send_to_fd(fd, 8, buf); /* send the start monitor command with its parameters to the IOP */
862 u->first_time = 1;
863 }
864 //printf("acn_start_monitor() complete\n"); // fulko
865 }
866
867 static int pcap_inject_acn(pcap_t *p, const void *buf _U_, size_t size _U_) {
868 strlcpy(p->errbuf, "Sending packets isn't supported on ACN adapters",
869 PCAP_ERRBUF_SIZE);
870 return (-1);
871 }
872
873 static int pcap_setfilter_acn(pcap_t *handle, struct bpf_program *bpf) {
874 int fd = handle->fd;
875 int count;
876 struct bpf_insn *p;
877 uint16_t shortInt;
878 uint32_t longInt;
879
880 send_to_fd(fd, 1, (unsigned char *)"F"); /* BPF filter follows command */
881 count = bpf->bf_len;
882 longInt = htonl(count);
883 send_to_fd(fd, 4, (unsigned char *)&longInt); /* send the instruction sequence count */
884 p = bpf->bf_insns;
885 while (count--) { /* followed by the list of instructions */
886 shortInt = htons(p->code);
887 longInt = htonl(p->k);
888 send_to_fd(fd, 2, (unsigned char *)&shortInt);
889 send_to_fd(fd, 1, (unsigned char *)&p->jt);
890 send_to_fd(fd, 1, (unsigned char *)&p->jf);
891 send_to_fd(fd, 4, (unsigned char *)&longInt);
892 p++;
893 }
894 if (get_error_response(fd, NULL))
895 return -1;
896 return 0;
897 }
898
899 static int pcap_setdirection_acn(pcap_t *handle, pcap_direction_t d) {
900 snprintf(handle->errbuf, sizeof(handle->errbuf),
901 "Setting direction is not supported on ACN adapters");
902 return -1;
903 }
904
905 static int acn_read_n_bytes_with_timeout(pcap_t *handle, int count) {
906 struct timeval tv;
907 int retval, fd;
908 fd_set r_fds;
909 fd_set w_fds;
910 u_char *bp;
911 int len = 0;
912 int offset = 0;
913
914 tv.tv_sec = 5;
915 tv.tv_usec = 0;
916
917 fd = handle->fd;
918 FD_ZERO(&r_fds);
919 FD_SET(fd, &r_fds);
920 memcpy(&w_fds, &r_fds, sizeof(r_fds));
921 bp = handle->bp;
922 while (count) {
923 retval = select(fd + 1, &w_fds, NULL, NULL, &tv);
924 if (retval == -1) { /* an error occured !!!!! */
925 // fprintf(stderr, "error during packet data read\n");
926 return -1; /* but we need to return a good indication to prevent unneccessary popups */
927 } else if (retval == 0) { /* timeout occured, so process what we've got sofar and return */
928 // fprintf(stderr, "timeout during packet data read\n");
929 return -1;
930 } else {
931 if ((len = recv(fd, (bp + offset), count, 0)) <= 0) {
932 // fprintf(stderr, "premature exit during packet data rx\n");
933 return -1;
934 }
935 count -= len;
936 offset += len;
937 }
938 }
939 return 0;
940 }
941
942 static int pcap_read_acn(pcap_t *handle, int max_packets, pcap_handler callback, u_char *user) {
943 #define HEADER_SIZE (4 * 4)
944 unsigned char packet_header[HEADER_SIZE];
945 struct pcap_pkthdr pcap_header;
946
947 //printf("pcap_read_acn()\n"); // fulko
948 acn_start_monitor(handle->fd, handle->snapshot, handle->opt.timeout, handle->opt.promisc, handle->direction); /* maybe tell him to start monitoring */
949 //printf("pcap_read_acn() after start monitor\n"); // fulko
950
951 handle->bp = packet_header;
952 if (acn_read_n_bytes_with_timeout(handle, HEADER_SIZE) == -1) return 0; /* try to read a packet header in so we can get the sizeof the packet data */
953
954 pcap_header.ts.tv_sec = ntohl(*(uint32_t *)&packet_header[0]); /* tv_sec */
955 pcap_header.ts.tv_usec = ntohl(*(uint32_t *)&packet_header[4]); /* tv_usec */
956 pcap_header.caplen = ntohl(*(uint32_t *)&packet_header[8]); /* caplen */
957 pcap_header.len = ntohl(*(uint32_t *)&packet_header[12]); /* len */
958
959 handle->bp = handle->buffer + handle->offset; /* start off the receive pointer at the right spot */
960 if (acn_read_n_bytes_with_timeout(handle, pcap_header.caplen) == -1) return 0; /* then try to read in the rest of the data */
961
962 callback(user, &pcap_header, handle->bp); /* call the user supplied callback function */
963 return 1;
964 }
965
966 static int pcap_activate_sita(pcap_t *handle) {
967 int fd;
968
969 if (handle->opt.rfmon) {
970 /*
971 * No monitor mode on SITA devices (they're not Wi-Fi
972 * devices).
973 */
974 return PCAP_ERROR_RFMON_NOTSUP;
975 }
976
977 /* Initialize some components of the pcap structure. */
978
979 handle->inject_op = pcap_inject_acn;
980 handle->setfilter_op = pcap_setfilter_acn;
981 handle->setdirection_op = pcap_setdirection_acn;
982 handle->set_datalink_op = NULL; /* can't change data link type */
983 handle->getnonblock_op = pcap_getnonblock_fd;
984 handle->setnonblock_op = pcap_setnonblock_fd;
985 handle->cleanup_op = pcap_cleanup_acn;
986 handle->read_op = pcap_read_acn;
987 handle->stats_op = pcap_stats_acn;
988
989 fd = acn_open_live(handle->opt.source, handle->errbuf,
990 &handle->linktype);
991 if (fd == -1)
992 return PCAP_ERROR;
993 handle->fd = fd;
994 handle->bufsize = handle->snapshot;
995
996 /* Allocate the buffer */
997
998 handle->buffer = malloc(handle->bufsize + handle->offset);
999 if (!handle->buffer) {
1000 snprintf(handle->errbuf, PCAP_ERRBUF_SIZE,
1001 "malloc: %s", pcap_strerror(errno));
1002 pcap_cleanup_acn(handle);
1003 return PCAP_ERROR;
1004 }
1005
1006 /*
1007 * "handle->fd" is a socket, so "select()" and "poll()"
1008 * should work on it.
1009 */
1010 handle->selectable_fd = handle->fd;
1011
1012 return 0;
1013 }
1014
1015 pcap_t *pcap_create_interface(const char *device, char *ebuf) {
1016 pcap_t *p;
1017
1018 p = pcap_create_common(device, ebuf, 0);
1019 if (p == NULL)
1020 return (NULL);
1021
1022 p->activate_op = pcap_activate_sita;
1023 return (p);
1024 }
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