1/*
2 * pcap-dag.c: Packet capture interface for Endace DAG card.
3 *
4 * The functionality of this code attempts to mimic that of pcap-linux as much
5 * as possible. This code is compiled in several different ways depending on
6 * whether DAG_ONLY and HAVE_DAG_API are defined. If HAVE_DAG_API is not
7 * defined it should not get compiled in, otherwise if DAG_ONLY is defined then
8 * the 'dag_' function calls are renamed to 'pcap_' equivalents. If DAG_ONLY
9 * is not defined then nothing is altered - the dag_ functions will be
10 * called as required from their pcap-linux/bpf equivalents.
11 *
12 * Authors: Richard Littin, Sean Irvine ({richard,sean}@reeltwo.com)
13 * Modifications: Jesper Peterson <support@endace.com>
14 * Koryn Grant <support@endace.com>
15 * Stephen Donnelly <support@endace.com>
16 */
17
18#ifndef lint
19static const char rcsid[] _U_ =
| 1/*
2 * pcap-dag.c: Packet capture interface for Endace DAG card.
3 *
4 * The functionality of this code attempts to mimic that of pcap-linux as much
5 * as possible. This code is compiled in several different ways depending on
6 * whether DAG_ONLY and HAVE_DAG_API are defined. If HAVE_DAG_API is not
7 * defined it should not get compiled in, otherwise if DAG_ONLY is defined then
8 * the 'dag_' function calls are renamed to 'pcap_' equivalents. If DAG_ONLY
9 * is not defined then nothing is altered - the dag_ functions will be
10 * called as required from their pcap-linux/bpf equivalents.
11 *
12 * Authors: Richard Littin, Sean Irvine ({richard,sean}@reeltwo.com)
13 * Modifications: Jesper Peterson <support@endace.com>
14 * Koryn Grant <support@endace.com>
15 * Stephen Donnelly <support@endace.com>
16 */
17
18#ifndef lint
19static const char rcsid[] _U_ =
|
20 "@(#) $Header: /tcpdump/master/libpcap/pcap-dag.c,v 1.21.2.3 2005/07/10 22:09:34 guy Exp $ (LBL)";
| 20 "@(#) $Header: /tcpdump/master/libpcap/pcap-dag.c,v 1.21.2.7 2007/06/22 06:43:58 guy Exp $ (LBL)";
|
21#endif
22
23#ifdef HAVE_CONFIG_H
24#include "config.h"
25#endif
26
27#include <sys/param.h> /* optionally get BSD define */
28
29#include <stdlib.h>
30#include <string.h>
31#include <errno.h>
32
33#include "pcap-int.h"
34
35#include <ctype.h>
36#include <netinet/in.h>
37#include <sys/mman.h>
38#include <sys/socket.h>
39#include <sys/types.h>
40#include <unistd.h>
41
42struct mbuf; /* Squelch compiler warnings on some platforms for */
43struct rtentry; /* declarations in <net/if.h> */
44#include <net/if.h>
45
46#include "dagnew.h"
47#include "dagapi.h"
48
| 21#endif
22
23#ifdef HAVE_CONFIG_H
24#include "config.h"
25#endif
26
27#include <sys/param.h> /* optionally get BSD define */
28
29#include <stdlib.h>
30#include <string.h>
31#include <errno.h>
32
33#include "pcap-int.h"
34
35#include <ctype.h>
36#include <netinet/in.h>
37#include <sys/mman.h>
38#include <sys/socket.h>
39#include <sys/types.h>
40#include <unistd.h>
41
42struct mbuf; /* Squelch compiler warnings on some platforms for */
43struct rtentry; /* declarations in <net/if.h> */
44#include <net/if.h>
45
46#include "dagnew.h"
47#include "dagapi.h"
48
|
49#define MIN_DAG_SNAPLEN 12
50#define MAX_DAG_SNAPLEN 2040
| |
51#define ATM_CELL_SIZE 52
52#define ATM_HDR_SIZE 4
53
| 49#define ATM_CELL_SIZE 52
50#define ATM_HDR_SIZE 4
51
|
| 52/*
53 * A header containing additional MTP information.
54 */
55#define MTP2_SENT_OFFSET 0 /* 1 byte */
56#define MTP2_ANNEX_A_USED_OFFSET 1 /* 1 byte */
57#define MTP2_LINK_NUMBER_OFFSET 2 /* 2 bytes */
58#define MTP2_HDR_LEN 4 /* length of the header */
59
60#define MTP2_ANNEX_A_NOT_USED 0
61#define MTP2_ANNEX_A_USED 1
62#define MTP2_ANNEX_A_USED_UNKNOWN 2
63
|
54/* SunATM pseudo header */
55struct sunatm_hdr {
56 unsigned char flags; /* destination and traffic type */
57 unsigned char vpi; /* VPI */
58 unsigned short vci; /* VCI */
59};
60
61typedef struct pcap_dag_node {
62 struct pcap_dag_node *next;
63 pcap_t *p;
64 pid_t pid;
65} pcap_dag_node_t;
66
67static pcap_dag_node_t *pcap_dags = NULL;
68static int atexit_handler_installed = 0;
69static const unsigned short endian_test_word = 0x0100;
70
71#define IS_BIGENDIAN() (*((unsigned char *)&endian_test_word))
72
| 64/* SunATM pseudo header */
65struct sunatm_hdr {
66 unsigned char flags; /* destination and traffic type */
67 unsigned char vpi; /* VPI */
68 unsigned short vci; /* VCI */
69};
70
71typedef struct pcap_dag_node {
72 struct pcap_dag_node *next;
73 pcap_t *p;
74 pid_t pid;
75} pcap_dag_node_t;
76
77static pcap_dag_node_t *pcap_dags = NULL;
78static int atexit_handler_installed = 0;
79static const unsigned short endian_test_word = 0x0100;
80
81#define IS_BIGENDIAN() (*((unsigned char *)&endian_test_word))
82
|
73/*
74 * Swap byte ordering of unsigned long long timestamp on a big endian
75 * machine.
76 */
77#define SWAP_TS(ull) ((ull & 0xff00000000000000LL) >> 56) | \
78 ((ull & 0x00ff000000000000LL) >> 40) | \
79 ((ull & 0x0000ff0000000000LL) >> 24) | \
80 ((ull & 0x000000ff00000000LL) >> 8) | \
81 ((ull & 0x00000000ff000000LL) << 8) | \
82 ((ull & 0x0000000000ff0000LL) << 24) | \
83 ((ull & 0x000000000000ff00LL) << 40) | \
84 ((ull & 0x00000000000000ffLL) << 56)
| |
85
| 83
|
86
| |
87#ifdef DAG_ONLY
88/* This code is required when compiling for a DAG device only. */
89#include "pcap-dag.h"
90
91/* Replace dag function names with pcap equivalent. */
92#define dag_open_live pcap_open_live
93#define dag_platform_finddevs pcap_platform_finddevs
94#endif /* DAG_ONLY */
95
| 84#ifdef DAG_ONLY
85/* This code is required when compiling for a DAG device only. */
86#include "pcap-dag.h"
87
88/* Replace dag function names with pcap equivalent. */
89#define dag_open_live pcap_open_live
90#define dag_platform_finddevs pcap_platform_finddevs
91#endif /* DAG_ONLY */
92
|
| 93#define MAX_DAG_PACKET 65536
94
95static unsigned char TempPkt[MAX_DAG_PACKET];
96
|
96static int dag_setfilter(pcap_t *p, struct bpf_program *fp);
97static int dag_stats(pcap_t *p, struct pcap_stat *ps);
98static int dag_set_datalink(pcap_t *p, int dlt);
99static int dag_get_datalink(pcap_t *p);
100static int dag_setnonblock(pcap_t *p, int nonblock, char *errbuf);
101
102static void
103delete_pcap_dag(pcap_t *p)
104{
105 pcap_dag_node_t *curr = NULL, *prev = NULL;
106
107 for (prev = NULL, curr = pcap_dags; curr != NULL && curr->p != p; prev = curr, curr = curr->next) {
108 /* empty */
109 }
110
111 if (curr != NULL && curr->p == p) {
112 if (prev != NULL) {
113 prev->next = curr->next;
114 } else {
115 pcap_dags = curr->next;
116 }
117 }
118}
119
120/*
121 * Performs a graceful shutdown of the DAG card, frees dynamic memory held
122 * in the pcap_t structure, and closes the file descriptor for the DAG card.
123 */
124
125static void
126dag_platform_close(pcap_t *p)
127{
128
129 if (p != NULL) {
130#ifdef HAVE_DAG_STREAMS_API
131 if(dag_stop_stream(p->fd, p->md.dag_stream) < 0)
132 fprintf(stderr,"dag_stop_stream: %s\n", strerror(errno));
133
134 if(dag_detach_stream(p->fd, p->md.dag_stream) < 0)
135 fprintf(stderr,"dag_detach_stream: %s\n", strerror(errno));
136#else
137 if(dag_stop(p->fd) < 0)
138 fprintf(stderr,"dag_stop: %s\n", strerror(errno));
139#endif /* HAVE_DAG_STREAMS_API */
140 if(dag_close(p->fd) < 0)
141 fprintf(stderr,"dag_close: %s\n", strerror(errno));
| 97static int dag_setfilter(pcap_t *p, struct bpf_program *fp);
98static int dag_stats(pcap_t *p, struct pcap_stat *ps);
99static int dag_set_datalink(pcap_t *p, int dlt);
100static int dag_get_datalink(pcap_t *p);
101static int dag_setnonblock(pcap_t *p, int nonblock, char *errbuf);
102
103static void
104delete_pcap_dag(pcap_t *p)
105{
106 pcap_dag_node_t *curr = NULL, *prev = NULL;
107
108 for (prev = NULL, curr = pcap_dags; curr != NULL && curr->p != p; prev = curr, curr = curr->next) {
109 /* empty */
110 }
111
112 if (curr != NULL && curr->p == p) {
113 if (prev != NULL) {
114 prev->next = curr->next;
115 } else {
116 pcap_dags = curr->next;
117 }
118 }
119}
120
121/*
122 * Performs a graceful shutdown of the DAG card, frees dynamic memory held
123 * in the pcap_t structure, and closes the file descriptor for the DAG card.
124 */
125
126static void
127dag_platform_close(pcap_t *p)
128{
129
130 if (p != NULL) {
131#ifdef HAVE_DAG_STREAMS_API
132 if(dag_stop_stream(p->fd, p->md.dag_stream) < 0)
133 fprintf(stderr,"dag_stop_stream: %s\n", strerror(errno));
134
135 if(dag_detach_stream(p->fd, p->md.dag_stream) < 0)
136 fprintf(stderr,"dag_detach_stream: %s\n", strerror(errno));
137#else
138 if(dag_stop(p->fd) < 0)
139 fprintf(stderr,"dag_stop: %s\n", strerror(errno));
140#endif /* HAVE_DAG_STREAMS_API */
141 if(dag_close(p->fd) < 0)
142 fprintf(stderr,"dag_close: %s\n", strerror(errno));
|
142#ifdef linux
143 free(p->md.device);
144#endif
| |
145 }
146 delete_pcap_dag(p);
147 /* Note: don't need to call close(p->fd) here as dag_close(p->fd) does this. */
148}
149
150static void
151atexit_handler(void)
152{
153 while (pcap_dags != NULL) {
154 if (pcap_dags->pid == getpid()) {
155 dag_platform_close(pcap_dags->p);
156 } else {
157 delete_pcap_dag(pcap_dags->p);
158 }
159 }
160}
161
162static int
163new_pcap_dag(pcap_t *p)
164{
165 pcap_dag_node_t *node = NULL;
166
167 if ((node = malloc(sizeof(pcap_dag_node_t))) == NULL) {
168 return -1;
169 }
170
171 if (!atexit_handler_installed) {
172 atexit(atexit_handler);
173 atexit_handler_installed = 1;
174 }
175
176 node->next = pcap_dags;
177 node->p = p;
178 node->pid = getpid();
179
180 pcap_dags = node;
181
182 return 0;
183}
184
185/*
186 * Read at most max_packets from the capture stream and call the callback
187 * for each of them. Returns the number of packets handled, -1 if an
188 * error occured, or -2 if we were told to break out of the loop.
189 */
190static int
191dag_read(pcap_t *p, int cnt, pcap_handler callback, u_char *user)
192{
193 unsigned int processed = 0;
194 int flags = p->md.dag_offset_flags;
195 unsigned int nonblocking = flags & DAGF_NONBLOCK;
196
197 /* Get the next bufferful of packets (if necessary). */
198 while (p->md.dag_mem_top - p->md.dag_mem_bottom < dag_record_size) {
199
200 /*
201 * Has "pcap_breakloop()" been called?
202 */
203 if (p->break_loop) {
204 /*
205 * Yes - clear the flag that indicates that
206 * it has, and return -2 to indicate that
207 * we were told to break out of the loop.
208 */
209 p->break_loop = 0;
210 return -2;
211 }
212
213#ifdef HAVE_DAG_STREAMS_API
214 /* dag_advance_stream() will block (unless nonblock is called)
215 * until 64kB of data has accumulated.
216 * If to_ms is set, it will timeout before 64kB has accumulated.
217 * We wait for 64kB because processing a few packets at a time
218 * can cause problems at high packet rates (>200kpps) due
219 * to inefficiencies.
220 * This does mean if to_ms is not specified the capture may 'hang'
221 * for long periods if the data rate is extremely slow (<64kB/sec)
222 * If non-block is specified it will return immediately. The user
223 * is then responsible for efficiency.
224 */
| 143 }
144 delete_pcap_dag(p);
145 /* Note: don't need to call close(p->fd) here as dag_close(p->fd) does this. */
146}
147
148static void
149atexit_handler(void)
150{
151 while (pcap_dags != NULL) {
152 if (pcap_dags->pid == getpid()) {
153 dag_platform_close(pcap_dags->p);
154 } else {
155 delete_pcap_dag(pcap_dags->p);
156 }
157 }
158}
159
160static int
161new_pcap_dag(pcap_t *p)
162{
163 pcap_dag_node_t *node = NULL;
164
165 if ((node = malloc(sizeof(pcap_dag_node_t))) == NULL) {
166 return -1;
167 }
168
169 if (!atexit_handler_installed) {
170 atexit(atexit_handler);
171 atexit_handler_installed = 1;
172 }
173
174 node->next = pcap_dags;
175 node->p = p;
176 node->pid = getpid();
177
178 pcap_dags = node;
179
180 return 0;
181}
182
183/*
184 * Read at most max_packets from the capture stream and call the callback
185 * for each of them. Returns the number of packets handled, -1 if an
186 * error occured, or -2 if we were told to break out of the loop.
187 */
188static int
189dag_read(pcap_t *p, int cnt, pcap_handler callback, u_char *user)
190{
191 unsigned int processed = 0;
192 int flags = p->md.dag_offset_flags;
193 unsigned int nonblocking = flags & DAGF_NONBLOCK;
194
195 /* Get the next bufferful of packets (if necessary). */
196 while (p->md.dag_mem_top - p->md.dag_mem_bottom < dag_record_size) {
197
198 /*
199 * Has "pcap_breakloop()" been called?
200 */
201 if (p->break_loop) {
202 /*
203 * Yes - clear the flag that indicates that
204 * it has, and return -2 to indicate that
205 * we were told to break out of the loop.
206 */
207 p->break_loop = 0;
208 return -2;
209 }
210
211#ifdef HAVE_DAG_STREAMS_API
212 /* dag_advance_stream() will block (unless nonblock is called)
213 * until 64kB of data has accumulated.
214 * If to_ms is set, it will timeout before 64kB has accumulated.
215 * We wait for 64kB because processing a few packets at a time
216 * can cause problems at high packet rates (>200kpps) due
217 * to inefficiencies.
218 * This does mean if to_ms is not specified the capture may 'hang'
219 * for long periods if the data rate is extremely slow (<64kB/sec)
220 * If non-block is specified it will return immediately. The user
221 * is then responsible for efficiency.
222 */
|
225 p->md.dag_mem_top = dag_advance_stream(p->fd, p->md.dag_stream, (void**)&(p->md.dag_mem_bottom));
| 223 p->md.dag_mem_top = dag_advance_stream(p->fd, p->md.dag_stream, &(p->md.dag_mem_bottom));
|
226#else
227 /* dag_offset does not support timeouts */
228 p->md.dag_mem_top = dag_offset(p->fd, &(p->md.dag_mem_bottom), flags);
229#endif /* HAVE_DAG_STREAMS_API */
230
231 if (nonblocking && (p->md.dag_mem_top - p->md.dag_mem_bottom < dag_record_size))
232 {
233 /* Pcap is configured to process only available packets, and there aren't any, return immediately. */
234 return 0;
235 }
236
237 if(!nonblocking &&
238 p->md.dag_timeout &&
239 (p->md.dag_mem_top - p->md.dag_mem_bottom < dag_record_size))
240 {
241 /* Blocking mode, but timeout set and no data has arrived, return anyway.*/
242 return 0;
243 }
244
245 }
246
247 /* Process the packets. */
248 while (p->md.dag_mem_top - p->md.dag_mem_bottom >= dag_record_size) {
249
250 unsigned short packet_len = 0;
251 int caplen = 0;
252 struct pcap_pkthdr pcap_header;
253
254#ifdef HAVE_DAG_STREAMS_API
255 dag_record_t *header = (dag_record_t *)(p->md.dag_mem_bottom);
256#else
257 dag_record_t *header = (dag_record_t *)(p->md.dag_mem_base + p->md.dag_mem_bottom);
258#endif /* HAVE_DAG_STREAMS_API */
259
260 u_char *dp = ((u_char *)header) + dag_record_size;
261 unsigned short rlen;
262
263 /*
264 * Has "pcap_breakloop()" been called?
265 */
266 if (p->break_loop) {
267 /*
268 * Yes - clear the flag that indicates that
269 * it has, and return -2 to indicate that
270 * we were told to break out of the loop.
271 */
272 p->break_loop = 0;
273 return -2;
274 }
275
276 rlen = ntohs(header->rlen);
277 if (rlen < dag_record_size)
278 {
279 strncpy(p->errbuf, "dag_read: record too small", PCAP_ERRBUF_SIZE);
280 return -1;
281 }
282 p->md.dag_mem_bottom += rlen;
283
284 switch(header->type) {
| 224#else
225 /* dag_offset does not support timeouts */
226 p->md.dag_mem_top = dag_offset(p->fd, &(p->md.dag_mem_bottom), flags);
227#endif /* HAVE_DAG_STREAMS_API */
228
229 if (nonblocking && (p->md.dag_mem_top - p->md.dag_mem_bottom < dag_record_size))
230 {
231 /* Pcap is configured to process only available packets, and there aren't any, return immediately. */
232 return 0;
233 }
234
235 if(!nonblocking &&
236 p->md.dag_timeout &&
237 (p->md.dag_mem_top - p->md.dag_mem_bottom < dag_record_size))
238 {
239 /* Blocking mode, but timeout set and no data has arrived, return anyway.*/
240 return 0;
241 }
242
243 }
244
245 /* Process the packets. */
246 while (p->md.dag_mem_top - p->md.dag_mem_bottom >= dag_record_size) {
247
248 unsigned short packet_len = 0;
249 int caplen = 0;
250 struct pcap_pkthdr pcap_header;
251
252#ifdef HAVE_DAG_STREAMS_API
253 dag_record_t *header = (dag_record_t *)(p->md.dag_mem_bottom);
254#else
255 dag_record_t *header = (dag_record_t *)(p->md.dag_mem_base + p->md.dag_mem_bottom);
256#endif /* HAVE_DAG_STREAMS_API */
257
258 u_char *dp = ((u_char *)header) + dag_record_size;
259 unsigned short rlen;
260
261 /*
262 * Has "pcap_breakloop()" been called?
263 */
264 if (p->break_loop) {
265 /*
266 * Yes - clear the flag that indicates that
267 * it has, and return -2 to indicate that
268 * we were told to break out of the loop.
269 */
270 p->break_loop = 0;
271 return -2;
272 }
273
274 rlen = ntohs(header->rlen);
275 if (rlen < dag_record_size)
276 {
277 strncpy(p->errbuf, "dag_read: record too small", PCAP_ERRBUF_SIZE);
278 return -1;
279 }
280 p->md.dag_mem_bottom += rlen;
281
282 switch(header->type) {
|
285 case TYPE_AAL5:
| |
286 case TYPE_ATM:
| 283 case TYPE_ATM:
|
| 284#ifdef TYPE_AAL5
285 case TYPE_AAL5:
286 if (header->type == TYPE_AAL5) {
287 packet_len = ntohs(header->wlen);
288 caplen = rlen - dag_record_size;
289 }
290#endif
|
287#ifdef TYPE_MC_ATM
288 case TYPE_MC_ATM:
289 if (header->type == TYPE_MC_ATM) {
290 caplen = packet_len = ATM_CELL_SIZE;
291 dp+=4;
292 }
293#endif
294#ifdef TYPE_MC_AAL5
295 case TYPE_MC_AAL5:
296 if (header->type == TYPE_MC_AAL5) {
297 packet_len = ntohs(header->wlen);
298 caplen = rlen - dag_record_size - 4;
299 dp+=4;
300 }
301#endif
| 291#ifdef TYPE_MC_ATM
292 case TYPE_MC_ATM:
293 if (header->type == TYPE_MC_ATM) {
294 caplen = packet_len = ATM_CELL_SIZE;
295 dp+=4;
296 }
297#endif
298#ifdef TYPE_MC_AAL5
299 case TYPE_MC_AAL5:
300 if (header->type == TYPE_MC_AAL5) {
301 packet_len = ntohs(header->wlen);
302 caplen = rlen - dag_record_size - 4;
303 dp+=4;
304 }
305#endif
|
302 if (header->type == TYPE_AAL5) {
303 packet_len = ntohs(header->wlen);
304 caplen = rlen - dag_record_size;
305 } else if(header->type == TYPE_ATM) {
| 306 if (header->type == TYPE_ATM) {
|
306 caplen = packet_len = ATM_CELL_SIZE;
307 }
308 if (p->linktype == DLT_SUNATM) {
309 struct sunatm_hdr *sunatm = (struct sunatm_hdr *)dp;
310 unsigned long rawatm;
311
312 rawatm = ntohl(*((unsigned long *)dp));
313 sunatm->vci = htons((rawatm >> 4) & 0xffff);
314 sunatm->vpi = (rawatm >> 20) & 0x00ff;
315 sunatm->flags = ((header->flags.iface & 1) ? 0x80 : 0x00) |
316 ((sunatm->vpi == 0 && sunatm->vci == htons(5)) ? 6 :
317 ((sunatm->vpi == 0 && sunatm->vci == htons(16)) ? 5 :
318 ((dp[ATM_HDR_SIZE] == 0xaa &&
319 dp[ATM_HDR_SIZE+1] == 0xaa &&
320 dp[ATM_HDR_SIZE+2] == 0x03) ? 2 : 1)));
321
322 } else {
323 packet_len -= ATM_HDR_SIZE;
324 caplen -= ATM_HDR_SIZE;
325 dp += ATM_HDR_SIZE;
326 }
327 break;
328
| 307 caplen = packet_len = ATM_CELL_SIZE;
308 }
309 if (p->linktype == DLT_SUNATM) {
310 struct sunatm_hdr *sunatm = (struct sunatm_hdr *)dp;
311 unsigned long rawatm;
312
313 rawatm = ntohl(*((unsigned long *)dp));
314 sunatm->vci = htons((rawatm >> 4) & 0xffff);
315 sunatm->vpi = (rawatm >> 20) & 0x00ff;
316 sunatm->flags = ((header->flags.iface & 1) ? 0x80 : 0x00) |
317 ((sunatm->vpi == 0 && sunatm->vci == htons(5)) ? 6 :
318 ((sunatm->vpi == 0 && sunatm->vci == htons(16)) ? 5 :
319 ((dp[ATM_HDR_SIZE] == 0xaa &&
320 dp[ATM_HDR_SIZE+1] == 0xaa &&
321 dp[ATM_HDR_SIZE+2] == 0x03) ? 2 : 1)));
322
323 } else {
324 packet_len -= ATM_HDR_SIZE;
325 caplen -= ATM_HDR_SIZE;
326 dp += ATM_HDR_SIZE;
327 }
328 break;
329
|
| 330#ifdef TYPE_DSM_COLOR_ETH
331 case TYPE_DSM_COLOR_ETH:
332#endif
|
329#ifdef TYPE_COLOR_ETH
330 case TYPE_COLOR_ETH:
331#endif
332 case TYPE_ETH:
333 packet_len = ntohs(header->wlen);
334 packet_len -= (p->md.dag_fcs_bits >> 3);
335 caplen = rlen - dag_record_size - 2;
336 if (caplen > packet_len) {
337 caplen = packet_len;
338 }
339 dp += 2;
340 break;
| 333#ifdef TYPE_COLOR_ETH
334 case TYPE_COLOR_ETH:
335#endif
336 case TYPE_ETH:
337 packet_len = ntohs(header->wlen);
338 packet_len -= (p->md.dag_fcs_bits >> 3);
339 caplen = rlen - dag_record_size - 2;
340 if (caplen > packet_len) {
341 caplen = packet_len;
342 }
343 dp += 2;
344 break;
|
| 345#ifdef TYPE_DSM_COLOR_HDLC_POS
346 case TYPE_DSM_COLOR_HDLC_POS:
347#endif
|
341#ifdef TYPE_COLOR_HDLC_POS
342 case TYPE_COLOR_HDLC_POS:
343#endif
344 case TYPE_HDLC_POS:
345 packet_len = ntohs(header->wlen);
346 packet_len -= (p->md.dag_fcs_bits >> 3);
347 caplen = rlen - dag_record_size;
348 if (caplen > packet_len) {
349 caplen = packet_len;
350 }
351 break;
| 348#ifdef TYPE_COLOR_HDLC_POS
349 case TYPE_COLOR_HDLC_POS:
350#endif
351 case TYPE_HDLC_POS:
352 packet_len = ntohs(header->wlen);
353 packet_len -= (p->md.dag_fcs_bits >> 3);
354 caplen = rlen - dag_record_size;
355 if (caplen > packet_len) {
356 caplen = packet_len;
357 }
358 break;
|
| 359#ifdef TYPE_COLOR_MC_HDLC_POS
360 case TYPE_COLOR_MC_HDLC_POS:
361#endif
|
352#ifdef TYPE_MC_HDLC
353 case TYPE_MC_HDLC:
354 packet_len = ntohs(header->wlen);
355 packet_len -= (p->md.dag_fcs_bits >> 3);
356 caplen = rlen - dag_record_size - 4;
357 if (caplen > packet_len) {
358 caplen = packet_len;
359 }
| 362#ifdef TYPE_MC_HDLC
363 case TYPE_MC_HDLC:
364 packet_len = ntohs(header->wlen);
365 packet_len -= (p->md.dag_fcs_bits >> 3);
366 caplen = rlen - dag_record_size - 4;
367 if (caplen > packet_len) {
368 caplen = packet_len;
369 }
|
| 370 /* jump the MC_HDLC_HEADER */
|
360 dp += 4;
| 371 dp += 4;
|
| 372 if (p->linktype == DLT_MTP2_WITH_PHDR) {
373 /* Add the MTP2 Pseudo Header */
374 caplen += MTP2_HDR_LEN;
375 packet_len += MTP2_HDR_LEN;
376
377 TempPkt[MTP2_SENT_OFFSET] = 0;
378 TempPkt[MTP2_ANNEX_A_USED_OFFSET] = MTP2_ANNEX_A_USED_UNKNOWN;
379 *(TempPkt+MTP2_LINK_NUMBER_OFFSET) = ((header->rec.mc_hdlc.mc_header>>16)&0x01);
380 *(TempPkt+MTP2_LINK_NUMBER_OFFSET+1) = ((header->rec.mc_hdlc.mc_header>>24)&0xff);
381 memcpy(TempPkt+MTP2_HDR_LEN, dp, caplen);
382 dp = TempPkt;
383 }
|
361 break;
362#endif
| 384 break;
385#endif
|
| 386 default:
387 /* Unhandled ERF type.
388 * Ignore rather than generating error
389 */
390 continue;
|
363 }
364
365 if (caplen > p->snapshot)
366 caplen = p->snapshot;
367
368 /* Count lost packets. */
369 switch(header->type) {
370#ifdef TYPE_COLOR_HDLC_POS
371 /* in this type the color value overwrites the lctr */
372 case TYPE_COLOR_HDLC_POS:
373 break;
374#endif
375#ifdef TYPE_COLOR_ETH
376 /* in this type the color value overwrites the lctr */
377 case TYPE_COLOR_ETH:
378 break;
379#endif
| 391 }
392
393 if (caplen > p->snapshot)
394 caplen = p->snapshot;
395
396 /* Count lost packets. */
397 switch(header->type) {
398#ifdef TYPE_COLOR_HDLC_POS
399 /* in this type the color value overwrites the lctr */
400 case TYPE_COLOR_HDLC_POS:
401 break;
402#endif
403#ifdef TYPE_COLOR_ETH
404 /* in this type the color value overwrites the lctr */
405 case TYPE_COLOR_ETH:
406 break;
407#endif
|
| 408#ifdef TYPE_DSM_COLOR_HDLC_POS
409 /* in this type the color value overwrites the lctr */
410 case TYPE_DSM_COLOR_HDLC_POS:
411 break;
412#endif
413#ifdef TYPE_DSM_COLOR_ETH
414 /* in this type the color value overwrites the lctr */
415 case TYPE_DSM_COLOR_ETH:
416 break;
417#endif
418#ifdef TYPE_COLOR_MC_HDLC_POS
419 case TYPE_COLOR_MC_HDLC_POS:
420 break;
421#endif
422
|
380 default:
381 if (header->lctr) {
382 if (p->md.stat.ps_drop > (UINT_MAX - ntohs(header->lctr))) {
383 p->md.stat.ps_drop = UINT_MAX;
384 } else {
385 p->md.stat.ps_drop += ntohs(header->lctr);
386 }
387 }
388 }
389
390 /* Run the packet filter if there is one. */
391 if ((p->fcode.bf_insns == NULL) || bpf_filter(p->fcode.bf_insns, dp, packet_len, caplen)) {
392
393 /* convert between timestamp formats */
394 register unsigned long long ts;
395
396 if (IS_BIGENDIAN()) {
| 423 default:
424 if (header->lctr) {
425 if (p->md.stat.ps_drop > (UINT_MAX - ntohs(header->lctr))) {
426 p->md.stat.ps_drop = UINT_MAX;
427 } else {
428 p->md.stat.ps_drop += ntohs(header->lctr);
429 }
430 }
431 }
432
433 /* Run the packet filter if there is one. */
434 if ((p->fcode.bf_insns == NULL) || bpf_filter(p->fcode.bf_insns, dp, packet_len, caplen)) {
435
436 /* convert between timestamp formats */
437 register unsigned long long ts;
438
439 if (IS_BIGENDIAN()) {
|
397 ts = SWAP_TS(header->ts);
| 440 ts = SWAPLL(header->ts);
|
398 } else {
399 ts = header->ts;
400 }
401
402 pcap_header.ts.tv_sec = ts >> 32;
403 ts = (ts & 0xffffffffULL) * 1000000;
404 ts += 0x80000000; /* rounding */
405 pcap_header.ts.tv_usec = ts >> 32;
406 if (pcap_header.ts.tv_usec >= 1000000) {
407 pcap_header.ts.tv_usec -= 1000000;
408 pcap_header.ts.tv_sec++;
409 }
410
411 /* Fill in our own header data */
412 pcap_header.caplen = caplen;
413 pcap_header.len = packet_len;
414
415 /* Count the packet. */
416 p->md.stat.ps_recv++;
417
418 /* Call the user supplied callback function */
419 callback(user, &pcap_header, dp);
420
421 /* Only count packets that pass the filter, for consistency with standard Linux behaviour. */
422 processed++;
423 if (processed == cnt)
424 {
425 /* Reached the user-specified limit. */
426 return cnt;
427 }
428 }
429 }
430
431 return processed;
432}
433
434static int
435dag_inject(pcap_t *p, const void *buf _U_, size_t size _U_)
436{
437 strlcpy(p->errbuf, "Sending packets isn't supported on DAG cards",
438 PCAP_ERRBUF_SIZE);
439 return (-1);
440}
441
442/*
443 * Get a handle for a live capture from the given DAG device. Passing a NULL
444 * device will result in a failure. The promisc flag is ignored because DAG
445 * cards are always promiscuous. The to_ms parameter is also ignored as it is
446 * not supported in hardware.
447 *
| 441 } else {
442 ts = header->ts;
443 }
444
445 pcap_header.ts.tv_sec = ts >> 32;
446 ts = (ts & 0xffffffffULL) * 1000000;
447 ts += 0x80000000; /* rounding */
448 pcap_header.ts.tv_usec = ts >> 32;
449 if (pcap_header.ts.tv_usec >= 1000000) {
450 pcap_header.ts.tv_usec -= 1000000;
451 pcap_header.ts.tv_sec++;
452 }
453
454 /* Fill in our own header data */
455 pcap_header.caplen = caplen;
456 pcap_header.len = packet_len;
457
458 /* Count the packet. */
459 p->md.stat.ps_recv++;
460
461 /* Call the user supplied callback function */
462 callback(user, &pcap_header, dp);
463
464 /* Only count packets that pass the filter, for consistency with standard Linux behaviour. */
465 processed++;
466 if (processed == cnt)
467 {
468 /* Reached the user-specified limit. */
469 return cnt;
470 }
471 }
472 }
473
474 return processed;
475}
476
477static int
478dag_inject(pcap_t *p, const void *buf _U_, size_t size _U_)
479{
480 strlcpy(p->errbuf, "Sending packets isn't supported on DAG cards",
481 PCAP_ERRBUF_SIZE);
482 return (-1);
483}
484
485/*
486 * Get a handle for a live capture from the given DAG device. Passing a NULL
487 * device will result in a failure. The promisc flag is ignored because DAG
488 * cards are always promiscuous. The to_ms parameter is also ignored as it is
489 * not supported in hardware.
490 *
|
| 491 * snaplen is now also ignored, until we get per-stream slen support. Set
492 * slen with approprite DAG tool BEFORE pcap_open_live().
493 *
|
448 * See also pcap(3).
449 */
450pcap_t *
451dag_open_live(const char *device, int snaplen, int promisc, int to_ms, char *ebuf)
452{
453 char conf[30]; /* dag configure string */
454 pcap_t *handle;
455 char *s;
456 int n;
457 daginf_t* daginf;
| 494 * See also pcap(3).
495 */
496pcap_t *
497dag_open_live(const char *device, int snaplen, int promisc, int to_ms, char *ebuf)
498{
499 char conf[30]; /* dag configure string */
500 pcap_t *handle;
501 char *s;
502 int n;
503 daginf_t* daginf;
|
458 char * newDev;
| 504 char * newDev = NULL;
|
459#ifdef HAVE_DAG_STREAMS_API
460 uint32_t mindata;
461 struct timeval maxwait;
462 struct timeval poll;
463#endif
464
465 if (device == NULL) {
466 snprintf(ebuf, PCAP_ERRBUF_SIZE, "device is NULL: %s", pcap_strerror(errno));
467 return NULL;
468 }
469 /* Allocate a handle for this session. */
470
471 handle = malloc(sizeof(*handle));
472 if (handle == NULL) {
473 snprintf(ebuf, PCAP_ERRBUF_SIZE, "malloc %s: %s", device, pcap_strerror(errno));
474 return NULL;
475 }
476
477 /* Initialize some components of the pcap structure. */
478
479 memset(handle, 0, sizeof(*handle));
480
| 505#ifdef HAVE_DAG_STREAMS_API
506 uint32_t mindata;
507 struct timeval maxwait;
508 struct timeval poll;
509#endif
510
511 if (device == NULL) {
512 snprintf(ebuf, PCAP_ERRBUF_SIZE, "device is NULL: %s", pcap_strerror(errno));
513 return NULL;
514 }
515 /* Allocate a handle for this session. */
516
517 handle = malloc(sizeof(*handle));
518 if (handle == NULL) {
519 snprintf(ebuf, PCAP_ERRBUF_SIZE, "malloc %s: %s", device, pcap_strerror(errno));
520 return NULL;
521 }
522
523 /* Initialize some components of the pcap structure. */
524
525 memset(handle, 0, sizeof(*handle));
526
|
481 newDev = (char *)malloc(strlen(device) + 16);
482
| |
483#ifdef HAVE_DAG_STREAMS_API
| 527#ifdef HAVE_DAG_STREAMS_API
|
| 528 newDev = (char *)malloc(strlen(device) + 16);
529 if (newDev == NULL) {
530 snprintf(ebuf, PCAP_ERRBUF_SIZE, "Can't allocate string for device name: %s\n", pcap_strerror(errno));
531 goto fail;
532 }
|
484
485 /* Parse input name to get dag device and stream number if provided */
486 if (dag_parse_name(device, newDev, strlen(device) + 16, &handle->md.dag_stream) < 0) {
487 snprintf(ebuf, PCAP_ERRBUF_SIZE, "dag_parse_name: %s\n", pcap_strerror(errno));
488 goto fail;
489 }
490 device = newDev;
491
492 if (handle->md.dag_stream%2) {
493 snprintf(ebuf, PCAP_ERRBUF_SIZE, "dag_parse_name: tx (even numbered) streams not supported for capture\n");
494 goto fail;
495 }
496#else
| 533
534 /* Parse input name to get dag device and stream number if provided */
535 if (dag_parse_name(device, newDev, strlen(device) + 16, &handle->md.dag_stream) < 0) {
536 snprintf(ebuf, PCAP_ERRBUF_SIZE, "dag_parse_name: %s\n", pcap_strerror(errno));
537 goto fail;
538 }
539 device = newDev;
540
541 if (handle->md.dag_stream%2) {
542 snprintf(ebuf, PCAP_ERRBUF_SIZE, "dag_parse_name: tx (even numbered) streams not supported for capture\n");
543 goto fail;
544 }
545#else
|
497 if (strstr(device, "/dev") == NULL) {
498 newDev[0] = '\0';
499 strcat(newDev, "/dev/");
500 strcat(newDev,device);
| 546 if (strncmp(device, "/dev/", 5) != 0) {
547 newDev = (char *)malloc(strlen(device) + 5);
548 if (newDev == NULL) {
549 snprintf(ebuf, PCAP_ERRBUF_SIZE, "Can't allocate string for device name: %s\n", pcap_strerror(errno));
550 goto fail;
551 }
552 strcpy(newDev, "/dev/");
553 strcat(newDev, device);
|
501 device = newDev;
| 554 device = newDev;
|
502 } else {
503 device = strdup(device);
| |
504 }
| 555 }
|
505
506 if (device == NULL) {
507 snprintf(ebuf, PCAP_ERRBUF_SIZE, "str_dup: %s\n", pcap_strerror(errno));
508 goto fail;
509 }
| |
510#endif /* HAVE_DAG_STREAMS_API */
511
512 /* setup device parameters */
513 if((handle->fd = dag_open((char *)device)) < 0) {
514 snprintf(ebuf, PCAP_ERRBUF_SIZE, "dag_open %s: %s", device, pcap_strerror(errno));
515 goto fail;
516 }
517
518#ifdef HAVE_DAG_STREAMS_API
519 /* Open requested stream. Can fail if already locked or on error */
520 if (dag_attach_stream(handle->fd, handle->md.dag_stream, 0, 0) < 0) {
521 snprintf(ebuf, PCAP_ERRBUF_SIZE, "dag_attach_stream: %s\n", pcap_strerror(errno));
| 556#endif /* HAVE_DAG_STREAMS_API */
557
558 /* setup device parameters */
559 if((handle->fd = dag_open((char *)device)) < 0) {
560 snprintf(ebuf, PCAP_ERRBUF_SIZE, "dag_open %s: %s", device, pcap_strerror(errno));
561 goto fail;
562 }
563
564#ifdef HAVE_DAG_STREAMS_API
565 /* Open requested stream. Can fail if already locked or on error */
566 if (dag_attach_stream(handle->fd, handle->md.dag_stream, 0, 0) < 0) {
567 snprintf(ebuf, PCAP_ERRBUF_SIZE, "dag_attach_stream: %s\n", pcap_strerror(errno));
|
522 goto fail;
| 568 goto failclose;
|
523 }
524
525 /* Set up default poll parameters for stream
526 * Can be overridden by pcap_set_nonblock()
527 */
528 if (dag_get_stream_poll(handle->fd, handle->md.dag_stream,
529 &mindata, &maxwait, &poll) < 0) {
530 snprintf(ebuf, PCAP_ERRBUF_SIZE, "dag_get_stream_poll: %s\n", pcap_strerror(errno));
| 569 }
570
571 /* Set up default poll parameters for stream
572 * Can be overridden by pcap_set_nonblock()
573 */
574 if (dag_get_stream_poll(handle->fd, handle->md.dag_stream,
575 &mindata, &maxwait, &poll) < 0) {
576 snprintf(ebuf, PCAP_ERRBUF_SIZE, "dag_get_stream_poll: %s\n", pcap_strerror(errno));
|
531 goto fail;
| 577 goto faildetach;
|
532 }
533
534 /* Amount of data to collect in Bytes before calling callbacks.
535 * Important for efficiency, but can introduce latency
536 * at low packet rates if to_ms not set!
537 */
538 mindata = 65536;
539
540 /* Obey to_ms if supplied. This is a good idea!
541 * Recommend 10-100ms. Calls will time out even if no data arrived.
542 */
543 maxwait.tv_sec = to_ms/1000;
544 maxwait.tv_usec = (to_ms%1000) * 1000;
545
546 if (dag_set_stream_poll(handle->fd, handle->md.dag_stream,
547 mindata, &maxwait, &poll) < 0) {
548 snprintf(ebuf, PCAP_ERRBUF_SIZE, "dag_set_stream_poll: %s\n", pcap_strerror(errno));
| 578 }
579
580 /* Amount of data to collect in Bytes before calling callbacks.
581 * Important for efficiency, but can introduce latency
582 * at low packet rates if to_ms not set!
583 */
584 mindata = 65536;
585
586 /* Obey to_ms if supplied. This is a good idea!
587 * Recommend 10-100ms. Calls will time out even if no data arrived.
588 */
589 maxwait.tv_sec = to_ms/1000;
590 maxwait.tv_usec = (to_ms%1000) * 1000;
591
592 if (dag_set_stream_poll(handle->fd, handle->md.dag_stream,
593 mindata, &maxwait, &poll) < 0) {
594 snprintf(ebuf, PCAP_ERRBUF_SIZE, "dag_set_stream_poll: %s\n", pcap_strerror(errno));
|
549 goto fail;
| 595 goto faildetach;
|
550 }
551
552#else
553 if((handle->md.dag_mem_base = dag_mmap(handle->fd)) == MAP_FAILED) {
554 snprintf(ebuf, PCAP_ERRBUF_SIZE,"dag_mmap %s: %s\n", device, pcap_strerror(errno));
| 596 }
597
598#else
599 if((handle->md.dag_mem_base = dag_mmap(handle->fd)) == MAP_FAILED) {
600 snprintf(ebuf, PCAP_ERRBUF_SIZE,"dag_mmap %s: %s\n", device, pcap_strerror(errno));
|
555 goto fail;
| 601 goto failclose;
|
556 }
557
558#endif /* HAVE_DAG_STREAMS_API */
559
| 602 }
603
604#endif /* HAVE_DAG_STREAMS_API */
605
|
| 606 /* XXX Not calling dag_configure() to set slen; this is unsafe in
607 * multi-stream environments as the gpp config is global.
608 * Once the firmware provides 'per-stream slen' this can be supported
609 * again via the Config API without side-effects */
610#if 0
|
560 /* set the card snap length to the specified snaplen parameter */
| 611 /* set the card snap length to the specified snaplen parameter */
|
| 612 /* This is a really bad idea, as different cards have different
613 * valid slen ranges. Should fix in Config API. */
|
561 if (snaplen == 0 || snaplen > MAX_DAG_SNAPLEN) {
562 snaplen = MAX_DAG_SNAPLEN;
563 } else if (snaplen < MIN_DAG_SNAPLEN) {
564 snaplen = MIN_DAG_SNAPLEN;
565 }
566 /* snap len has to be a multiple of 4 */
567 snprintf(conf, 30, "varlen slen=%d", (snaplen + 3) & ~3);
568
569 if(dag_configure(handle->fd, conf) < 0) {
570 snprintf(ebuf, PCAP_ERRBUF_SIZE,"dag_configure %s: %s\n", device, pcap_strerror(errno));
| 614 if (snaplen == 0 || snaplen > MAX_DAG_SNAPLEN) {
615 snaplen = MAX_DAG_SNAPLEN;
616 } else if (snaplen < MIN_DAG_SNAPLEN) {
617 snaplen = MIN_DAG_SNAPLEN;
618 }
619 /* snap len has to be a multiple of 4 */
620 snprintf(conf, 30, "varlen slen=%d", (snaplen + 3) & ~3);
621
622 if(dag_configure(handle->fd, conf) < 0) {
623 snprintf(ebuf, PCAP_ERRBUF_SIZE,"dag_configure %s: %s\n", device, pcap_strerror(errno));
|
571 goto fail;
| 624 goto faildetach;
|
572 }
| 625 }
|
573
| 626#endif
627
|
574#ifdef HAVE_DAG_STREAMS_API
575 if(dag_start_stream(handle->fd, handle->md.dag_stream) < 0) {
576 snprintf(ebuf, PCAP_ERRBUF_SIZE, "dag_start_stream %s: %s\n", device, pcap_strerror(errno));
| 628#ifdef HAVE_DAG_STREAMS_API
629 if(dag_start_stream(handle->fd, handle->md.dag_stream) < 0) {
630 snprintf(ebuf, PCAP_ERRBUF_SIZE, "dag_start_stream %s: %s\n", device, pcap_strerror(errno));
|
577 goto fail;
| 631 goto faildetach;
|
578 }
579#else
580 if(dag_start(handle->fd) < 0) {
581 snprintf(ebuf, PCAP_ERRBUF_SIZE, "dag_start %s: %s\n", device, pcap_strerror(errno));
| 632 }
633#else
634 if(dag_start(handle->fd) < 0) {
635 snprintf(ebuf, PCAP_ERRBUF_SIZE, "dag_start %s: %s\n", device, pcap_strerror(errno));
|
582 goto fail;
| 636 goto failclose;
|
583 }
584#endif /* HAVE_DAG_STREAMS_API */
585
586 /*
587 * Important! You have to ensure bottom is properly
588 * initialized to zero on startup, it won't give you
589 * a compiler warning if you make this mistake!
590 */
591 handle->md.dag_mem_bottom = 0;
592 handle->md.dag_mem_top = 0;
593 handle->md.dag_fcs_bits = 32;
594
595 /* Query the card first for special cases. */
596 daginf = dag_info(handle->fd);
597 if ((0x4200 == daginf->device_code) || (0x4230 == daginf->device_code))
598 {
599 /* DAG 4.2S and 4.23S already strip the FCS. Stripping the final word again truncates the packet. */
600 handle->md.dag_fcs_bits = 0;
601 }
602
603 /* Then allow an environment variable to override. */
604 if ((s = getenv("ERF_FCS_BITS")) != NULL) {
605 if ((n = atoi(s)) == 0 || n == 16|| n == 32) {
606 handle->md.dag_fcs_bits = n;
607 } else {
608 snprintf(ebuf, PCAP_ERRBUF_SIZE,
609 "pcap_open_live %s: bad ERF_FCS_BITS value (%d) in environment\n", device, n);
| 637 }
638#endif /* HAVE_DAG_STREAMS_API */
639
640 /*
641 * Important! You have to ensure bottom is properly
642 * initialized to zero on startup, it won't give you
643 * a compiler warning if you make this mistake!
644 */
645 handle->md.dag_mem_bottom = 0;
646 handle->md.dag_mem_top = 0;
647 handle->md.dag_fcs_bits = 32;
648
649 /* Query the card first for special cases. */
650 daginf = dag_info(handle->fd);
651 if ((0x4200 == daginf->device_code) || (0x4230 == daginf->device_code))
652 {
653 /* DAG 4.2S and 4.23S already strip the FCS. Stripping the final word again truncates the packet. */
654 handle->md.dag_fcs_bits = 0;
655 }
656
657 /* Then allow an environment variable to override. */
658 if ((s = getenv("ERF_FCS_BITS")) != NULL) {
659 if ((n = atoi(s)) == 0 || n == 16|| n == 32) {
660 handle->md.dag_fcs_bits = n;
661 } else {
662 snprintf(ebuf, PCAP_ERRBUF_SIZE,
663 "pcap_open_live %s: bad ERF_FCS_BITS value (%d) in environment\n", device, n);
|
610 goto fail;
| 664 goto failstop;
|
611 }
612 }
613
614 handle->snapshot = snaplen;
615 handle->md.dag_timeout = to_ms;
616
617 handle->linktype = -1;
618 if (dag_get_datalink(handle) < 0) {
619 strcpy(ebuf, handle->errbuf);
| 665 }
666 }
667
668 handle->snapshot = snaplen;
669 handle->md.dag_timeout = to_ms;
670
671 handle->linktype = -1;
672 if (dag_get_datalink(handle) < 0) {
673 strcpy(ebuf, handle->errbuf);
|
620 goto fail;
| 674 goto failstop;
|
621 }
622
623 handle->bufsize = 0;
624
625 if (new_pcap_dag(handle) < 0) {
626 snprintf(ebuf, PCAP_ERRBUF_SIZE, "new_pcap_dag %s: %s\n", device, pcap_strerror(errno));
| 675 }
676
677 handle->bufsize = 0;
678
679 if (new_pcap_dag(handle) < 0) {
680 snprintf(ebuf, PCAP_ERRBUF_SIZE, "new_pcap_dag %s: %s\n", device, pcap_strerror(errno));
|
627 goto fail;
| 681 goto failstop;
|
628 }
629
630 /*
631 * "select()" and "poll()" don't work on DAG device descriptors.
632 */
633 handle->selectable_fd = -1;
634
| 682 }
683
684 /*
685 * "select()" and "poll()" don't work on DAG device descriptors.
686 */
687 handle->selectable_fd = -1;
688
|
635#ifdef linux
636 handle->md.device = (char *)device;
637 handle->md.timeout = to_ms;
638#else
639 free((char *)device);
640 device = NULL;
641#endif
| 689 if (newDev != NULL) {
690 free((char *)newDev);
691 }
|
642
643 handle->read_op = dag_read;
644 handle->inject_op = dag_inject;
645 handle->setfilter_op = dag_setfilter;
646 handle->setdirection_op = NULL; /* Not implemented.*/
647 handle->set_datalink_op = dag_set_datalink;
648 handle->getnonblock_op = pcap_getnonblock_fd;
649 handle->setnonblock_op = dag_setnonblock;
650 handle->stats_op = dag_stats;
651 handle->close_op = dag_platform_close;
| 692
693 handle->read_op = dag_read;
694 handle->inject_op = dag_inject;
695 handle->setfilter_op = dag_setfilter;
696 handle->setdirection_op = NULL; /* Not implemented.*/
697 handle->set_datalink_op = dag_set_datalink;
698 handle->getnonblock_op = pcap_getnonblock_fd;
699 handle->setnonblock_op = dag_setnonblock;
700 handle->stats_op = dag_stats;
701 handle->close_op = dag_platform_close;
|
652
| 702 handle->md.stat.ps_drop = 0;
703 handle->md.stat.ps_recv = 0;
|
653 return handle;
654
| 704 return handle;
705
|
| 706#ifdef HAVE_DAG_STREAMS_API
707failstop:
708 if (handle != NULL) {
709 if (dag_stop_stream(handle->fd, handle->md.dag_stream) < 0)
710 fprintf(stderr,"dag_stop_stream: %s\n", strerror(errno));
711 }
712
713faildetach:
714 if (handle != NULL) {
715 if (dag_detach_stream(handle->fd, handle->md.dag_stream) < 0)
716 fprintf(stderr,"dag_detach_stream: %s\n", strerror(errno));
717 }
718#else
719failstop:
720 if (handle != NULL) {
721 if (dag_stop(p->fd) < 0)
722 fprintf(stderr,"dag_stop: %s\n", strerror(errno));
723 }
724#endif /* HAVE_DAG_STREAMS_API */
725
726failclose:
727 if (handle != NULL) {
728 if (dag_close(handle->fd) < 0)
729 fprintf(stderr,"dag_close: %s\n", strerror(errno));
730 }
731 if (handle != NULL)
732 delete_pcap_dag(handle);
733
|
655fail:
656 if (newDev != NULL) {
657 free((char *)newDev);
658 }
659 if (handle != NULL) {
660 /*
661 * Get rid of any link-layer type list we allocated.
662 */
663 if (handle->dlt_list != NULL) {
664 free(handle->dlt_list);
665 }
666 free(handle);
667 }
668
669 return NULL;
670}
671
672static int
673dag_stats(pcap_t *p, struct pcap_stat *ps) {
674 /* This needs to be filled out correctly. Hopefully a dagapi call will
675 provide all necessary information.
676 */
677 /*p->md.stat.ps_recv = 0;*/
678 /*p->md.stat.ps_drop = 0;*/
679
680 *ps = p->md.stat;
681
682 return 0;
683}
684
685/*
686 * Simply submit all possible dag names as candidates.
687 * pcap_add_if() internally tests each candidate with pcap_open_live(),
688 * so any non-existent devices are dropped.
689 * For 2.5 try all rx stream names as well.
690 */
691int
692dag_platform_finddevs(pcap_if_t **devlistp, char *errbuf)
693{
694 char name[12]; /* XXX - pick a size */
695 int ret = 0;
696 int c;
697
698 /* Try all the DAGs 0-9 */
699 for (c = 0; c < 9; c++) {
700 snprintf(name, 12, "dag%d", c);
701 if (pcap_add_if(devlistp, name, 0, NULL, errbuf) == -1) {
702 /*
703 * Failure.
704 */
705 ret = -1;
706 }
707#ifdef HAVE_DAG_STREAMS_API
708 {
709 int stream;
710 for(stream=0;stream<16;stream+=2) {
711 snprintf(name, 10, "dag%d:%d", c, stream);
712 if (pcap_add_if(devlistp, name, 0, NULL, errbuf) == -1) {
713 /*
714 * Failure.
715 */
716 ret = -1;
717 }
718 }
719 }
720#endif /* HAVE_DAG_STREAMS_API */
721 }
722 return (ret);
723}
724
725/*
726 * Installs the given bpf filter program in the given pcap structure. There is
727 * no attempt to store the filter in kernel memory as that is not supported
728 * with DAG cards.
729 */
730static int
731dag_setfilter(pcap_t *p, struct bpf_program *fp)
732{
733 if (!p)
734 return -1;
735 if (!fp) {
736 strncpy(p->errbuf, "setfilter: No filter specified",
737 sizeof(p->errbuf));
738 return -1;
739 }
740
741 /* Make our private copy of the filter */
742
743 if (install_bpf_program(p, fp) < 0)
744 return -1;
745
746 p->md.use_bpf = 0;
747
748 return (0);
749}
750
751static int
752dag_set_datalink(pcap_t *p, int dlt)
753{
754 p->linktype = dlt;
755
756 return (0);
757}
758
759static int
760dag_setnonblock(pcap_t *p, int nonblock, char *errbuf)
761{
762 /*
763 * Set non-blocking mode on the FD.
764 * XXX - is that necessary? If not, don't bother calling it,
765 * and have a "dag_getnonblock()" function that looks at
766 * "p->md.dag_offset_flags".
767 */
768 if (pcap_setnonblock_fd(p, nonblock, errbuf) < 0)
769 return (-1);
770#ifdef HAVE_DAG_STREAMS_API
771 {
772 uint32_t mindata;
773 struct timeval maxwait;
774 struct timeval poll;
775
776 if (dag_get_stream_poll(p->fd, p->md.dag_stream,
777 &mindata, &maxwait, &poll) < 0) {
778 snprintf(errbuf, PCAP_ERRBUF_SIZE, "dag_get_stream_poll: %s\n", pcap_strerror(errno));
779 return -1;
780 }
781
782 /* Amount of data to collect in Bytes before calling callbacks.
783 * Important for efficiency, but can introduce latency
784 * at low packet rates if to_ms not set!
785 */
786 if(nonblock)
787 mindata = 0;
788 else
789 mindata = 65536;
790
791 if (dag_set_stream_poll(p->fd, p->md.dag_stream,
792 mindata, &maxwait, &poll) < 0) {
793 snprintf(errbuf, PCAP_ERRBUF_SIZE, "dag_set_stream_poll: %s\n", pcap_strerror(errno));
794 return -1;
795 }
796 }
797#endif /* HAVE_DAG_STREAMS_API */
798 if (nonblock) {
799 p->md.dag_offset_flags |= DAGF_NONBLOCK;
800 } else {
801 p->md.dag_offset_flags &= ~DAGF_NONBLOCK;
802 }
803 return (0);
804}
805
806static int
807dag_get_datalink(pcap_t *p)
808{
| 734fail:
735 if (newDev != NULL) {
736 free((char *)newDev);
737 }
738 if (handle != NULL) {
739 /*
740 * Get rid of any link-layer type list we allocated.
741 */
742 if (handle->dlt_list != NULL) {
743 free(handle->dlt_list);
744 }
745 free(handle);
746 }
747
748 return NULL;
749}
750
751static int
752dag_stats(pcap_t *p, struct pcap_stat *ps) {
753 /* This needs to be filled out correctly. Hopefully a dagapi call will
754 provide all necessary information.
755 */
756 /*p->md.stat.ps_recv = 0;*/
757 /*p->md.stat.ps_drop = 0;*/
758
759 *ps = p->md.stat;
760
761 return 0;
762}
763
764/*
765 * Simply submit all possible dag names as candidates.
766 * pcap_add_if() internally tests each candidate with pcap_open_live(),
767 * so any non-existent devices are dropped.
768 * For 2.5 try all rx stream names as well.
769 */
770int
771dag_platform_finddevs(pcap_if_t **devlistp, char *errbuf)
772{
773 char name[12]; /* XXX - pick a size */
774 int ret = 0;
775 int c;
776
777 /* Try all the DAGs 0-9 */
778 for (c = 0; c < 9; c++) {
779 snprintf(name, 12, "dag%d", c);
780 if (pcap_add_if(devlistp, name, 0, NULL, errbuf) == -1) {
781 /*
782 * Failure.
783 */
784 ret = -1;
785 }
786#ifdef HAVE_DAG_STREAMS_API
787 {
788 int stream;
789 for(stream=0;stream<16;stream+=2) {
790 snprintf(name, 10, "dag%d:%d", c, stream);
791 if (pcap_add_if(devlistp, name, 0, NULL, errbuf) == -1) {
792 /*
793 * Failure.
794 */
795 ret = -1;
796 }
797 }
798 }
799#endif /* HAVE_DAG_STREAMS_API */
800 }
801 return (ret);
802}
803
804/*
805 * Installs the given bpf filter program in the given pcap structure. There is
806 * no attempt to store the filter in kernel memory as that is not supported
807 * with DAG cards.
808 */
809static int
810dag_setfilter(pcap_t *p, struct bpf_program *fp)
811{
812 if (!p)
813 return -1;
814 if (!fp) {
815 strncpy(p->errbuf, "setfilter: No filter specified",
816 sizeof(p->errbuf));
817 return -1;
818 }
819
820 /* Make our private copy of the filter */
821
822 if (install_bpf_program(p, fp) < 0)
823 return -1;
824
825 p->md.use_bpf = 0;
826
827 return (0);
828}
829
830static int
831dag_set_datalink(pcap_t *p, int dlt)
832{
833 p->linktype = dlt;
834
835 return (0);
836}
837
838static int
839dag_setnonblock(pcap_t *p, int nonblock, char *errbuf)
840{
841 /*
842 * Set non-blocking mode on the FD.
843 * XXX - is that necessary? If not, don't bother calling it,
844 * and have a "dag_getnonblock()" function that looks at
845 * "p->md.dag_offset_flags".
846 */
847 if (pcap_setnonblock_fd(p, nonblock, errbuf) < 0)
848 return (-1);
849#ifdef HAVE_DAG_STREAMS_API
850 {
851 uint32_t mindata;
852 struct timeval maxwait;
853 struct timeval poll;
854
855 if (dag_get_stream_poll(p->fd, p->md.dag_stream,
856 &mindata, &maxwait, &poll) < 0) {
857 snprintf(errbuf, PCAP_ERRBUF_SIZE, "dag_get_stream_poll: %s\n", pcap_strerror(errno));
858 return -1;
859 }
860
861 /* Amount of data to collect in Bytes before calling callbacks.
862 * Important for efficiency, but can introduce latency
863 * at low packet rates if to_ms not set!
864 */
865 if(nonblock)
866 mindata = 0;
867 else
868 mindata = 65536;
869
870 if (dag_set_stream_poll(p->fd, p->md.dag_stream,
871 mindata, &maxwait, &poll) < 0) {
872 snprintf(errbuf, PCAP_ERRBUF_SIZE, "dag_set_stream_poll: %s\n", pcap_strerror(errno));
873 return -1;
874 }
875 }
876#endif /* HAVE_DAG_STREAMS_API */
877 if (nonblock) {
878 p->md.dag_offset_flags |= DAGF_NONBLOCK;
879 } else {
880 p->md.dag_offset_flags &= ~DAGF_NONBLOCK;
881 }
882 return (0);
883}
884
885static int
886dag_get_datalink(pcap_t *p)
887{
|
809 int daglinktype;
| 888 int index=0;
889 uint8_t types[255];
|
810
| 890
|
811 if (p->dlt_list == NULL && (p->dlt_list = malloc(2*sizeof(*(p->dlt_list)))) == NULL) {
| 891 memset(types, 0, 255);
892
893 if (p->dlt_list == NULL && (p->dlt_list = malloc(255*sizeof(*(p->dlt_list)))) == NULL) {
|
812 (void)snprintf(p->errbuf, sizeof(p->errbuf), "malloc: %s", pcap_strerror(errno));
813 return (-1);
814 }
815
| 894 (void)snprintf(p->errbuf, sizeof(p->errbuf), "malloc: %s", pcap_strerror(errno));
895 return (-1);
896 }
897
|
| 898 p->linktype = 0;
899
900#ifdef HAVE_DAG_GET_ERF_TYPES
901 /* Get list of possible ERF types for this card */
902 if (dag_get_erf_types(p->fd, types, 255) < 0) {
903 snprintf(p->errbuf, sizeof(p->errbuf), "dag_get_erf_types: %s", pcap_strerror(errno));
904 return (-1);
905 }
906
907 while (types[index]) {
908#else
|
816 /* Check the type through a dagapi call. */
| 909 /* Check the type through a dagapi call. */
|
817 daglinktype = dag_linktype(p->fd);
| 910 types[index] = dag_linktype(p->fd);
|
818
| 911
|
819 switch(daglinktype) {
| 912 {
913#endif
914 switch(types[index]) {
|
820
| 915
|
821 case TYPE_HDLC_POS:
822 case TYPE_COLOR_HDLC_POS:
823 if (p->dlt_list != NULL) {
824 p->dlt_count = 2;
825 p->dlt_list[0] = DLT_CHDLC;
826 p->dlt_list[1] = DLT_PPP_SERIAL;
827 p->dlt_list[2] = DLT_FRELAY;
828 }
829 p->linktype = DLT_CHDLC;
830 break;
| 916 case TYPE_HDLC_POS:
917#ifdef TYPE_COLOR_HDLC_POS
918 case TYPE_COLOR_HDLC_POS:
919#endif
920#ifdef TYPE_DSM_COLOR_HDLC_POS
921 case TYPE_DSM_COLOR_HDLC_POS:
922#endif
923 if (p->dlt_list != NULL) {
924 p->dlt_list[index++] = DLT_CHDLC;
925 p->dlt_list[index++] = DLT_PPP_SERIAL;
926 p->dlt_list[index++] = DLT_FRELAY;
927 }
928 if(!p->linktype)
929 p->linktype = DLT_CHDLC;
930 break;
|
831
| 931
|
832 case TYPE_ETH:
833 case TYPE_COLOR_ETH:
834 /*
835 * This is (presumably) a real Ethernet capture; give it a
836 * link-layer-type list with DLT_EN10MB and DLT_DOCSIS, so
837 * that an application can let you choose it, in case you're
838 * capturing DOCSIS traffic that a Cisco Cable Modem
839 * Termination System is putting out onto an Ethernet (it
840 * doesn't put an Ethernet header onto the wire, it puts raw
841 * DOCSIS frames out on the wire inside the low-level
842 * Ethernet framing).
843 */
844 if (p->dlt_list != NULL) {
845 p->dlt_count = 2;
846 p->dlt_list[0] = DLT_EN10MB;
847 p->dlt_list[1] = DLT_DOCSIS;
848 }
849 p->linktype = DLT_EN10MB;
850 break;
| 932 case TYPE_ETH:
933#ifdef TYPE_COLOR_ETH
934 case TYPE_COLOR_ETH:
935#endif
936#ifdef TYPE_DSM_COLOR_ETH
937 case TYPE_DSM_COLOR_ETH:
938#endif
939 /*
940 * This is (presumably) a real Ethernet capture; give it a
941 * link-layer-type list with DLT_EN10MB and DLT_DOCSIS, so
942 * that an application can let you choose it, in case you're
943 * capturing DOCSIS traffic that a Cisco Cable Modem
944 * Termination System is putting out onto an Ethernet (it
945 * doesn't put an Ethernet header onto the wire, it puts raw
946 * DOCSIS frames out on the wire inside the low-level
947 * Ethernet framing).
948 */
949 if (p->dlt_list != NULL) {
950 p->dlt_list[index++] = DLT_EN10MB;
951 p->dlt_list[index++] = DLT_DOCSIS;
952 }
953 if(!p->linktype)
954 p->linktype = DLT_EN10MB;
955 break;
|
851
| 956
|
852 case TYPE_AAL5:
853 case TYPE_ATM:
854 case TYPE_MC_ATM:
855 case TYPE_MC_AAL5:
856 if (p->dlt_list != NULL) {
857 p->dlt_count = 2;
858 p->dlt_list[0] = DLT_ATM_RFC1483;
859 p->dlt_list[1] = DLT_SUNATM;
860 }
861 p->linktype = DLT_ATM_RFC1483;
862 break;
| 957 case TYPE_ATM:
958#ifdef TYPE_AAL5
959 case TYPE_AAL5:
960#endif
961#ifdef TYPE_MC_ATM
962 case TYPE_MC_ATM:
963#endif
964#ifdef TYPE_MC_AAL5
965 case TYPE_MC_AAL5:
966#endif
967 if (p->dlt_list != NULL) {
968 p->dlt_list[index++] = DLT_ATM_RFC1483;
969 p->dlt_list[index++] = DLT_SUNATM;
970 }
971 if(!p->linktype)
972 p->linktype = DLT_ATM_RFC1483;
973 break;
|
863
| 974
|
864 case TYPE_MC_HDLC:
865 if (p->dlt_list != NULL) {
866 p->dlt_count = 4;
867 p->dlt_list[0] = DLT_CHDLC;
868 p->dlt_list[1] = DLT_PPP_SERIAL;
869 p->dlt_list[2] = DLT_FRELAY;
870 p->dlt_list[3] = DLT_MTP2;
871 }
872 p->linktype = DLT_CHDLC;
873 break;
| 975#ifdef TYPE_COLOR_MC_HDLC_POS
976 case TYPE_COLOR_MC_HDLC_POS:
977#endif
978#ifdef TYPE_MC_HDLC
979 case TYPE_MC_HDLC:
980 if (p->dlt_list != NULL) {
981 p->dlt_list[index++] = DLT_CHDLC;
982 p->dlt_list[index++] = DLT_PPP_SERIAL;
983 p->dlt_list[index++] = DLT_FRELAY;
984 p->dlt_list[index++] = DLT_MTP2;
985 p->dlt_list[index++] = DLT_MTP2_WITH_PHDR;
986 }
987 if(!p->linktype)
988 p->linktype = DLT_CHDLC;
989 break;
990#endif
|
874
| 991
|
875 case TYPE_LEGACY:
876 p->linktype = DLT_NULL;
877 break;
| 992 case TYPE_LEGACY:
993 if(!p->linktype)
994 p->linktype = DLT_NULL;
995 break;
|
878
| 996
|
879 default:
880 snprintf(p->errbuf, sizeof(p->errbuf), "unknown DAG linktype %d\n", daglinktype);
881 return (-1);
| 997 default:
998 snprintf(p->errbuf, sizeof(p->errbuf), "unknown DAG linktype %d", types[index]);
999 return (-1);
|
882
| 1000
|
| 1001 } /* switch */
|
883 }
884
| 1002 }
1003
|
| 1004 p->dlt_count = index;
1005
|
885 return p->linktype;
886}
| 1006 return p->linktype;
1007}
|