From Jesper Peterson:
- don't auto-detect HDLC DLT on serial links, use "pcap_set_datalink()" to choose the link-layer header - for ATM, allow selecting SUNATM rather than the default RFC1483 with "pcap_set_datalink()" - reformat and otherwise clean up the code.
This commit is contained in:
guy
parent
f2101dbb5d
commit
fab5c982f2
789
pcap-dag.c
789
pcap-dag.c
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@ -9,27 +9,13 @@
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* is not defined then nothing is altered - the dag_ functions will be
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* called as required from their pcap-linux/bpf equivalents.
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*
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* Author: Richard Littin, Sean Irvine ({richard,sean}@reeltwo.com)
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*
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* Modifications:
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* 2003 May - Jesper Peterson <support@endace.com>
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* Code shuffled around to suit fad-xxx.c structure
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* Added atexit() handler to stop DAG if application is too lazy
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* 2003 September - Koryn Grant <koryn@endace.com>
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* Added support for nonblocking operation.
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* Added support for processing more than a single packet in pcap_dispatch().
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* Fixed bug in loss counter code.
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* Improved portability of loss counter code (e.g. use UINT_MAX instead of 0xffff).
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* Removed unused local variables.
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* Added required headers (ctype.h, limits.h, unistd.h, netinet/in.h).
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* 2003 October - Koryn Grant <koryn@endace.com.>
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* Changed semantics to match those of standard pcap on linux.
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* - packets rejected by the filter are not counted.
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* Authors: Richard Littin, Sean Irvine ({richard,sean}@reeltwo.com)
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* Modifications: Jesper Peterson, Koryn Grant <support@endace.com>
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*/
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#ifndef lint
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static const char rcsid[] _U_ =
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"@(#) $Header: /tcpdump/master/libpcap/pcap-dag.c,v 1.15 2003-12-18 23:32:31 guy Exp $ (LBL)";
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"@(#) $Header: /tcpdump/master/libpcap/pcap-dag.c,v 1.16 2004-01-05 18:18:54 guy Exp $ (LBL)";
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#endif
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#ifdef HAVE_CONFIG_H
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@ -60,12 +46,20 @@ struct rtentry; /* declarations in <net/if.h> */
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#define MIN_DAG_SNAPLEN 12
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#define MAX_DAG_SNAPLEN 2040
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#define ATM_SNAPLEN 48
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#define ATM_CELL_SIZE 52
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#define ATM_HDR_SIZE 4
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/* SunATM pseudo header */
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struct sunatm_hdr {
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unsigned char flags; /* destination and traffic type */
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unsigned char vpi; /* VPI */
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unsigned short vci; /* VCI */
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};
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typedef struct pcap_dag_node {
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struct pcap_dag_node *next;
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pcap_t *p;
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pid_t pid;
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struct pcap_dag_node *next;
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pcap_t *p;
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pid_t pid;
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} pcap_dag_node_t;
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static pcap_dag_node_t *pcap_dags = NULL;
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@ -103,22 +97,22 @@ static int dag_set_datalink(pcap_t *p, int dlt);
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static int dag_get_datalink(pcap_t *p);
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static int dag_setnonblock(pcap_t *p, int nonblock, char *errbuf);
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static void delete_pcap_dag(pcap_t *p) {
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pcap_dag_node_t *curr = NULL, *prev = NULL;
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static void
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delete_pcap_dag(pcap_t *p)
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{
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pcap_dag_node_t *curr = NULL, *prev = NULL;
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for (prev = NULL, curr = pcap_dags;
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curr != NULL && curr->p != p;
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prev = curr, curr = curr->next) {
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/* empty */
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}
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for (prev = NULL, curr = pcap_dags; curr != NULL && curr->p != p; prev = curr, curr = curr->next) {
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/* empty */
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}
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if (curr != NULL && curr->p == p) {
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if (prev != NULL) {
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prev->next = curr->next;
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} else {
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pcap_dags = curr->next;
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}
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}
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if (curr != NULL && curr->p == p) {
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if (prev != NULL) {
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prev->next = curr->next;
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} else {
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pcap_dags = curr->next;
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}
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}
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}
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/*
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@ -126,58 +120,64 @@ static void delete_pcap_dag(pcap_t *p) {
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* in the pcap_t structure, and closes the file descriptor for the DAG card.
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*/
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static void dag_platform_close(pcap_t *p) {
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static void
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dag_platform_close(pcap_t *p)
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{
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#ifdef linux
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if (p != NULL && p->md.device != NULL) {
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if(dag_stop(p->fd) < 0)
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fprintf(stderr,"dag_stop %s: %s\n", p->md.device, strerror(errno));
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if(dag_close(p->fd) < 0)
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fprintf(stderr,"dag_close %s: %s\n", p->md.device, strerror(errno));
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free(p->md.device);
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}
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if (p != NULL && p->md.device != NULL) {
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if(dag_stop(p->fd) < 0)
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fprintf(stderr,"dag_stop %s: %s\n", p->md.device, strerror(errno));
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if(dag_close(p->fd) < 0)
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fprintf(stderr,"dag_close %s: %s\n", p->md.device, strerror(errno));
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free(p->md.device);
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}
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#else
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if (p != NULL) {
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if(dag_stop(p->fd) < 0)
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fprintf(stderr,"dag_stop: %s\n", strerror(errno));
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if(dag_close(p->fd) < 0)
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fprintf(stderr,"dag_close: %s\n", strerror(errno));
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}
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if (p != NULL) {
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if(dag_stop(p->fd) < 0)
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fprintf(stderr,"dag_stop: %s\n", strerror(errno));
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if(dag_close(p->fd) < 0)
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fprintf(stderr,"dag_close: %s\n", strerror(errno));
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}
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#endif
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delete_pcap_dag(p);
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/* Note: don't need to call close(p->fd) here as dag_close(p->fd) does this. */
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delete_pcap_dag(p);
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/* Note: don't need to call close(p->fd) here as dag_close(p->fd) does this. */
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}
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static void atexit_handler(void) {
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while (pcap_dags != NULL) {
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if (pcap_dags->pid == getpid()) {
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dag_platform_close(pcap_dags->p);
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} else {
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delete_pcap_dag(pcap_dags->p);
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}
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}
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static void
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atexit_handler(void)
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{
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while (pcap_dags != NULL) {
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if (pcap_dags->pid == getpid()) {
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dag_platform_close(pcap_dags->p);
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} else {
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delete_pcap_dag(pcap_dags->p);
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}
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}
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}
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static int new_pcap_dag(pcap_t *p) {
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pcap_dag_node_t *node = NULL;
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static int
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new_pcap_dag(pcap_t *p)
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{
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pcap_dag_node_t *node = NULL;
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if ((node = malloc(sizeof(pcap_dag_node_t))) == NULL) {
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return -1;
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}
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if ((node = malloc(sizeof(pcap_dag_node_t))) == NULL) {
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return -1;
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}
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if (!atexit_handler_installed) {
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atexit(atexit_handler);
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atexit_handler_installed = 1;
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}
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if (!atexit_handler_installed) {
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atexit(atexit_handler);
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atexit_handler_installed = 1;
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}
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node->next = pcap_dags;
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node->p = p;
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node->pid = getpid();
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node->next = pcap_dags;
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node->p = p;
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node->pid = getpid();
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pcap_dags = node;
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pcap_dags = node;
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return 0;
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return 0;
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}
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/*
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@ -185,7 +185,9 @@ static int new_pcap_dag(pcap_t *p) {
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* for each of them. Returns the number of packets handled, -1 if an
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* error occured, or -2 if we were told to break out of the loop.
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*/
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static int dag_read(pcap_t *p, int cnt, pcap_handler callback, u_char *user) {
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static int
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dag_read(pcap_t *p, int cnt, pcap_handler callback, u_char *user)
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{
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unsigned int processed = 0;
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int flags = p->md.dag_offset_flags;
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unsigned int nonblocking = flags & DAGF_NONBLOCK;
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@ -215,7 +217,7 @@ static int dag_read(pcap_t *p, int cnt, pcap_handler callback, u_char *user) {
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return 0;
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}
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}
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/* Process the packets. */
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while (p->md.dag_mem_top - p->md.dag_mem_bottom >= dag_record_size) {
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@ -240,54 +242,74 @@ static int dag_read(pcap_t *p, int cnt, pcap_handler callback, u_char *user) {
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return -2;
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}
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if (IS_BIGENDIAN())
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{
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if (IS_BIGENDIAN()) {
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rlen = header->rlen;
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}
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else
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{
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} else {
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rlen = ntohs(header->rlen);
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}
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p->md.dag_mem_bottom += rlen;
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switch(header->type) {
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case TYPE_AAL5:
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case TYPE_ATM:
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packet_len = ATM_SNAPLEN;
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caplen = ATM_SNAPLEN;
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dp += 4;
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if (header->type == TYPE_AAL5) {
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if (IS_BIGENDIAN()) {
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packet_len = header->wlen;
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} else {
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packet_len = ntohs(header->wlen);
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}
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caplen = rlen - dag_record_size;
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} else {
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caplen = packet_len = ATM_CELL_SIZE;
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}
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if (p->linktype == DLT_SUNATM) {
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struct sunatm_hdr *sunatm = (struct sunatm_hdr *)dp;
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unsigned long rawatm;
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if (IS_BIGENDIAN()) {
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rawatm = *((unsigned long *)dp);
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sunatm->vci = (rawatm >> 4) & 0xffff;
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} else {
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rawatm = ntohl(*((unsigned long *)dp));
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sunatm->vci = htons((rawatm >> 4) & 0xffff);
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}
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sunatm->vpi = (rawatm >> 20) & 0x00ff;
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sunatm->flags = ((header->flags.iface & 1) ? 0x80 : 0x00) |
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((sunatm->vpi == 0 && sunatm->vci == 5) ? 6 :
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((sunatm->vpi == 0 && sunatm->vci == 16) ? 5 :
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((dp[ATM_HDR_SIZE] == 0xaa &&
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dp[ATM_HDR_SIZE+1] == 0xaa &&
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dp[ATM_HDR_SIZE+2] == 0x03) ? 2 : 1)));
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} else {
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packet_len -= ATM_HDR_SIZE;
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caplen -= ATM_HDR_SIZE;
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dp += ATM_HDR_SIZE;
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}
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break;
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case TYPE_ETH:
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if (IS_BIGENDIAN())
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{
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if (IS_BIGENDIAN()) {
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packet_len = header->wlen;
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}
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else
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{
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} else {
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packet_len = ntohs(header->wlen);
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}
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packet_len -= (p->md.dag_fcs_bits >> 3);
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caplen = rlen - dag_record_size - 2;
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if (caplen > packet_len)
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{
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if (caplen > packet_len) {
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caplen = packet_len;
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}
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dp += 2;
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break;
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case TYPE_HDLC_POS:
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if (IS_BIGENDIAN())
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{
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if (IS_BIGENDIAN()) {
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packet_len = header->wlen;
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}
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else
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{
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} else {
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packet_len = ntohs(header->wlen);
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}
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packet_len -= (p->md.dag_fcs_bits >> 3);
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caplen = rlen - dag_record_size;
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if (caplen > packet_len)
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{
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if (caplen > packet_len) {
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caplen = packet_len;
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}
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break;
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@ -311,16 +333,13 @@ static int dag_read(pcap_t *p, int cnt, pcap_handler callback, u_char *user) {
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/* convert between timestamp formats */
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register unsigned long long ts;
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if (IS_BIGENDIAN())
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{
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if (IS_BIGENDIAN()) {
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ts = SWAP_TS(header->ts);
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}
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else
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{
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} else {
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ts = header->ts;
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}
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pcap_header.ts.tv_sec = ts >> 32;
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pcap_header.ts.tv_sec = ts >> 32;
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ts = (ts & 0xffffffffULL) * 1000000;
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ts += 0x80000000; /* rounding */
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pcap_header.ts.tv_usec = ts >> 32;
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@ -332,13 +351,13 @@ static int dag_read(pcap_t *p, int cnt, pcap_handler callback, u_char *user) {
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/* Fill in our own header data */
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pcap_header.caplen = caplen;
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pcap_header.len = packet_len;
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/* Count the packet. */
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p->md.stat.ps_recv++;
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/* Call the user supplied callback function */
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callback(user, &pcap_header, dp);
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/* Only count packets that pass the filter, for consistency with standard Linux behaviour. */
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processed++;
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if (processed == cnt)
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@ -354,7 +373,7 @@ static int dag_read(pcap_t *p, int cnt, pcap_handler callback, u_char *user) {
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return processed;
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}
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}
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return processed;
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}
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@ -366,157 +385,161 @@ static int dag_read(pcap_t *p, int cnt, pcap_handler callback, u_char *user) {
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*
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* See also pcap(3).
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*/
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pcap_t *dag_open_live(const char *device, int snaplen, int promisc, int to_ms, char *ebuf) {
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char conf[30]; /* dag configure string */
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pcap_t *handle;
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char *s;
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int n;
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if (device == NULL) {
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snprintf(ebuf, PCAP_ERRBUF_SIZE, "device is NULL: %s", pcap_strerror(errno));
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return NULL;
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}
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/* Allocate a handle for this session. */
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pcap_t *
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dag_open_live(const char *device, int snaplen, int promisc, int to_ms, char *ebuf)
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{
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char conf[30]; /* dag configure string */
|
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pcap_t *handle;
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char *s;
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int n;
|
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|
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if (device == NULL) {
|
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snprintf(ebuf, PCAP_ERRBUF_SIZE, "device is NULL: %s", pcap_strerror(errno));
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return NULL;
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}
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/* Allocate a handle for this session. */
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|
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handle = malloc(sizeof(*handle));
|
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if (handle == NULL) {
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snprintf(ebuf, PCAP_ERRBUF_SIZE, "malloc %s: %s", device, pcap_strerror(errno));
|
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return NULL;
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}
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/* Initialize some components of the pcap structure. */
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memset(handle, 0, sizeof(*handle));
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handle = malloc(sizeof(*handle));
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if (handle == NULL) {
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snprintf(ebuf, PCAP_ERRBUF_SIZE, "malloc %s: %s", device, pcap_strerror(errno));
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return NULL;
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}
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/* Initialize some components of the pcap structure. */
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memset(handle, 0, sizeof(*handle));
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|
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if (strstr(device, "/dev") == NULL) {
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char * newDev = (char *)malloc(strlen(device) + 6);
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newDev[0] = '\0';
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strcat(newDev, "/dev/");
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strcat(newDev,device);
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device = newDev;
|
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} else {
|
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device = strdup(device);
|
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}
|
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if (strstr(device, "/dev") == NULL) {
|
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char * newDev = (char *)malloc(strlen(device) + 6);
|
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newDev[0] = '\0';
|
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strcat(newDev, "/dev/");
|
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strcat(newDev,device);
|
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device = newDev;
|
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} else {
|
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device = strdup(device);
|
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}
|
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|
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if (device == NULL) {
|
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snprintf(ebuf, PCAP_ERRBUF_SIZE, "str_dup: %s\n", pcap_strerror(errno));
|
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goto fail;
|
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}
|
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if (device == NULL) {
|
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snprintf(ebuf, PCAP_ERRBUF_SIZE, "str_dup: %s\n", pcap_strerror(errno));
|
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goto fail;
|
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}
|
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|
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/* setup device parameters */
|
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if((handle->fd = dag_open((char *)device)) < 0) {
|
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snprintf(ebuf, PCAP_ERRBUF_SIZE, "dag_open %s: %s", device, pcap_strerror(errno));
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goto fail;
|
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}
|
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/* setup device parameters */
|
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if((handle->fd = dag_open((char *)device)) < 0) {
|
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snprintf(ebuf, PCAP_ERRBUF_SIZE, "dag_open %s: %s", device, pcap_strerror(errno));
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goto fail;
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}
|
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|
||||
/* set the card snap length to the specified snaplen parameter */
|
||||
if (snaplen == 0 || snaplen > MAX_DAG_SNAPLEN) {
|
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snaplen = MAX_DAG_SNAPLEN;
|
||||
} else if (snaplen < MIN_DAG_SNAPLEN) {
|
||||
snaplen = MIN_DAG_SNAPLEN;
|
||||
}
|
||||
/* snap len has to be a multiple of 4 */
|
||||
snprintf(conf, 30, "varlen slen=%d", (snaplen + 3) & ~3);
|
||||
/* set the card snap length to the specified snaplen parameter */
|
||||
if (snaplen == 0 || snaplen > MAX_DAG_SNAPLEN) {
|
||||
snaplen = MAX_DAG_SNAPLEN;
|
||||
} else if (snaplen < MIN_DAG_SNAPLEN) {
|
||||
snaplen = MIN_DAG_SNAPLEN;
|
||||
}
|
||||
/* snap len has to be a multiple of 4 */
|
||||
snprintf(conf, 30, "varlen slen=%d", (snaplen + 3) & ~3);
|
||||
|
||||
fprintf(stderr, "Configuring DAG with '%s'.\n", conf);
|
||||
if(dag_configure(handle->fd, conf) < 0) {
|
||||
snprintf(ebuf, PCAP_ERRBUF_SIZE,"dag_configure %s: %s\n", device, pcap_strerror(errno));
|
||||
goto fail;
|
||||
}
|
||||
|
||||
if((handle->md.dag_mem_base = dag_mmap(handle->fd)) == MAP_FAILED) {
|
||||
snprintf(ebuf, PCAP_ERRBUF_SIZE,"dag_mmap %s: %s\n", device, pcap_strerror(errno));
|
||||
goto fail;
|
||||
}
|
||||
|
||||
if(dag_start(handle->fd) < 0) {
|
||||
snprintf(ebuf, PCAP_ERRBUF_SIZE, "dag_start %s: %s\n", device, pcap_strerror(errno));
|
||||
goto fail;
|
||||
}
|
||||
if(dag_configure(handle->fd, conf) < 0) {
|
||||
snprintf(ebuf, PCAP_ERRBUF_SIZE,"dag_configure %s: %s\n", device, pcap_strerror(errno));
|
||||
goto fail;
|
||||
}
|
||||
|
||||
if((handle->md.dag_mem_base = dag_mmap(handle->fd)) == MAP_FAILED) {
|
||||
snprintf(ebuf, PCAP_ERRBUF_SIZE,"dag_mmap %s: %s\n", device, pcap_strerror(errno));
|
||||
goto fail;
|
||||
}
|
||||
|
||||
if(dag_start(handle->fd) < 0) {
|
||||
snprintf(ebuf, PCAP_ERRBUF_SIZE, "dag_start %s: %s\n", device, pcap_strerror(errno));
|
||||
goto fail;
|
||||
}
|
||||
|
||||
/*
|
||||
* Important! You have to ensure bottom is properly
|
||||
* initialized to zero on startup, it won't give you
|
||||
* a compiler warning if you make this mistake!
|
||||
*/
|
||||
handle->md.dag_mem_bottom = 0;
|
||||
handle->md.dag_mem_top = 0;
|
||||
/*
|
||||
* Important! You have to ensure bottom is properly
|
||||
* initialized to zero on startup, it won't give you
|
||||
* a compiler warning if you make this mistake!
|
||||
*/
|
||||
handle->md.dag_mem_bottom = 0;
|
||||
handle->md.dag_mem_top = 0;
|
||||
|
||||
/* TODO: query the card */
|
||||
handle->md.dag_fcs_bits = 32;
|
||||
if ((s = getenv("ERF_FCS_BITS")) != NULL) {
|
||||
if ((n = atoi(s)) == 0 || n == 16|| n == 32) {
|
||||
handle->md.dag_fcs_bits = n;
|
||||
} else {
|
||||
snprintf(ebuf, PCAP_ERRBUF_SIZE,
|
||||
"pcap_open_live %s: bad ERF_FCS_BITS value (%d) in environment\n", device, n);
|
||||
goto fail;
|
||||
}
|
||||
}
|
||||
/* TODO: query the card */
|
||||
handle->md.dag_fcs_bits = 32;
|
||||
if ((s = getenv("ERF_FCS_BITS")) != NULL) {
|
||||
if ((n = atoi(s)) == 0 || n == 16|| n == 32) {
|
||||
handle->md.dag_fcs_bits = n;
|
||||
} else {
|
||||
snprintf(ebuf, PCAP_ERRBUF_SIZE,
|
||||
"pcap_open_live %s: bad ERF_FCS_BITS value (%d) in environment\n", device, n);
|
||||
goto fail;
|
||||
}
|
||||
}
|
||||
|
||||
handle->snapshot = snaplen;
|
||||
/*handle->md.timeout = to_ms; */
|
||||
handle->snapshot = snaplen;
|
||||
/*handle->md.timeout = to_ms; */
|
||||
|
||||
if (dag_get_datalink(handle) < 0) {
|
||||
snprintf(ebuf, PCAP_ERRBUF_SIZE, "dag_get_linktype %s: unknown linktype\n", device);
|
||||
goto fail;
|
||||
}
|
||||
|
||||
handle->bufsize = 0;
|
||||
handle->linktype = -1;
|
||||
if (dag_get_datalink(handle) < 0) {
|
||||
strcpy(ebuf, handle->errbuf);
|
||||
goto fail;
|
||||
}
|
||||
|
||||
handle->bufsize = 0;
|
||||
|
||||
if (new_pcap_dag(handle) < 0) {
|
||||
snprintf(ebuf, PCAP_ERRBUF_SIZE, "new_pcap_dag %s: %s\n", device, pcap_strerror(errno));
|
||||
goto fail;
|
||||
}
|
||||
if (new_pcap_dag(handle) < 0) {
|
||||
snprintf(ebuf, PCAP_ERRBUF_SIZE, "new_pcap_dag %s: %s\n", device, pcap_strerror(errno));
|
||||
goto fail;
|
||||
}
|
||||
|
||||
/*
|
||||
* "select()" and "poll()" don't (yet) work on DAG device descriptors.
|
||||
*/
|
||||
handle->selectable_fd = -1;
|
||||
/*
|
||||
* "select()" and "poll()" don't (yet) work on DAG device descriptors.
|
||||
*/
|
||||
handle->selectable_fd = -1;
|
||||
|
||||
#ifdef linux
|
||||
handle->md.device = (char *)device;
|
||||
handle->md.device = (char *)device;
|
||||
#else
|
||||
free((char *)device);
|
||||
device = NULL;
|
||||
free((char *)device);
|
||||
device = NULL;
|
||||
#endif
|
||||
|
||||
handle->read_op = dag_read;
|
||||
handle->setfilter_op = dag_setfilter;
|
||||
handle->set_datalink_op = dag_set_datalink;
|
||||
handle->getnonblock_op = pcap_getnonblock_fd;
|
||||
handle->setnonblock_op = dag_setnonblock;
|
||||
handle->stats_op = dag_stats;
|
||||
handle->close_op = dag_platform_close;
|
||||
handle->read_op = dag_read;
|
||||
handle->setfilter_op = dag_setfilter;
|
||||
handle->set_datalink_op = dag_set_datalink;
|
||||
handle->getnonblock_op = pcap_getnonblock_fd;
|
||||
handle->setnonblock_op = dag_setnonblock;
|
||||
handle->stats_op = dag_stats;
|
||||
handle->close_op = dag_platform_close;
|
||||
|
||||
return handle;
|
||||
return handle;
|
||||
|
||||
fail:
|
||||
if (device != NULL) {
|
||||
free((char *)device);
|
||||
}
|
||||
if (handle != NULL) {
|
||||
/*
|
||||
* Get rid of any link-layer type list we allocated.
|
||||
*/
|
||||
if (handle->dlt_list != NULL)
|
||||
free(handle->dlt_list);
|
||||
free(handle);
|
||||
}
|
||||
if (device != NULL) {
|
||||
free((char *)device);
|
||||
}
|
||||
if (handle != NULL) {
|
||||
/*
|
||||
* Get rid of any link-layer type list we allocated.
|
||||
*/
|
||||
if (handle->dlt_list != NULL) {
|
||||
free(handle->dlt_list);
|
||||
}
|
||||
free(handle);
|
||||
}
|
||||
|
||||
return NULL;
|
||||
return NULL;
|
||||
}
|
||||
|
||||
static int dag_stats(pcap_t *p, struct pcap_stat *ps) {
|
||||
/* This needs to be filled out correctly. Hopefully a dagapi call will
|
||||
provide all necessary information.
|
||||
*/
|
||||
/*p->md.stat.ps_recv = 0;*/
|
||||
/*p->md.stat.ps_drop = 0;*/
|
||||
|
||||
*ps = p->md.stat;
|
||||
static int
|
||||
dag_stats(pcap_t *p, struct pcap_stat *ps) {
|
||||
/* This needs to be filled out correctly. Hopefully a dagapi call will
|
||||
provide all necessary information.
|
||||
*/
|
||||
/*p->md.stat.ps_recv = 0;*/
|
||||
/*p->md.stat.ps_drop = 0;*/
|
||||
|
||||
*ps = p->md.stat;
|
||||
|
||||
return 0;
|
||||
return 0;
|
||||
}
|
||||
|
||||
/*
|
||||
|
|
@ -532,87 +555,86 @@ static int dag_stats(pcap_t *p, struct pcap_stat *ps) {
|
|||
int
|
||||
dag_platform_finddevs(pcap_if_t **devlistp, char *errbuf)
|
||||
{
|
||||
FILE *proc_dag_f;
|
||||
char linebuf[512];
|
||||
int linenum;
|
||||
unsigned char *p;
|
||||
char name[512]; /* XXX - pick a size */
|
||||
char *q;
|
||||
int ret = 0;
|
||||
FILE *proc_dag_f;
|
||||
char linebuf[512];
|
||||
int linenum;
|
||||
unsigned char *p;
|
||||
char name[512]; /* XXX - pick a size */
|
||||
char *q;
|
||||
int ret = 0;
|
||||
|
||||
/* Quick exit if /proc/dag not readable */
|
||||
proc_dag_f = fopen("/proc/dag", "r");
|
||||
if (proc_dag_f == NULL)
|
||||
{
|
||||
int i;
|
||||
char dev[16] = "dagx";
|
||||
/* Quick exit if /proc/dag not readable */
|
||||
proc_dag_f = fopen("/proc/dag", "r");
|
||||
if (proc_dag_f == NULL)
|
||||
{
|
||||
int i;
|
||||
char dev[16] = "dagx";
|
||||
|
||||
for (i = '0'; ret == 0 && i <= '9'; i++) {
|
||||
dev[3] = i;
|
||||
if (pcap_add_if(devlistp, dev, 0, NULL, errbuf) == -1) {
|
||||
/*
|
||||
* Failure.
|
||||
*/
|
||||
ret = -1;
|
||||
}
|
||||
}
|
||||
|
||||
return (ret);
|
||||
}
|
||||
for (i = '0'; ret == 0 && i <= '9'; i++) {
|
||||
dev[3] = i;
|
||||
if (pcap_add_if(devlistp, dev, 0, NULL, errbuf) == -1) {
|
||||
/*
|
||||
* Failure.
|
||||
*/
|
||||
ret = -1;
|
||||
}
|
||||
}
|
||||
|
||||
for (linenum = 1;
|
||||
fgets(linebuf, sizeof linebuf, proc_dag_f) != NULL; linenum++) {
|
||||
|
||||
/*
|
||||
* Skip the first two lines - they're headers.
|
||||
*/
|
||||
if (linenum <= 2)
|
||||
continue;
|
||||
return (ret);
|
||||
}
|
||||
|
||||
p = &linebuf[0];
|
||||
for (linenum = 1; fgets(linebuf, sizeof linebuf, proc_dag_f) != NULL; linenum++) {
|
||||
|
||||
/*
|
||||
* Skip the first two lines - they're headers.
|
||||
*/
|
||||
if (linenum <= 2)
|
||||
continue;
|
||||
|
||||
if (*p == '\0' || *p == '\n' || *p != 'D')
|
||||
continue; /* not a Dag line */
|
||||
p = &linebuf[0];
|
||||
|
||||
/*
|
||||
* Get the interface name.
|
||||
*/
|
||||
q = &name[0];
|
||||
while (*p != '\0' && *p != ':') {
|
||||
if (*p != ' ')
|
||||
*q++ = tolower(*p++);
|
||||
else
|
||||
p++;
|
||||
}
|
||||
*q = '\0';
|
||||
if (*p == '\0' || *p == '\n' || *p != 'D')
|
||||
continue; /* not a Dag line */
|
||||
|
||||
/*
|
||||
* Add an entry for this interface, with no addresses.
|
||||
*/
|
||||
p[strlen(p) - 1] = '\0'; /* get rid of \n */
|
||||
if (pcap_add_if(devlistp, name, 0, strdup(p + 2), errbuf) == -1) {
|
||||
/*
|
||||
* Failure.
|
||||
*/
|
||||
ret = -1;
|
||||
break;
|
||||
}
|
||||
}
|
||||
if (ret != -1) {
|
||||
/*
|
||||
* Well, we didn't fail for any other reason; did we
|
||||
* fail due to an error reading the file?
|
||||
*/
|
||||
if (ferror(proc_dag_f)) {
|
||||
(void)snprintf(errbuf, PCAP_ERRBUF_SIZE,
|
||||
"Error reading /proc/dag: %s",
|
||||
pcap_strerror(errno));
|
||||
ret = -1;
|
||||
}
|
||||
}
|
||||
/*
|
||||
* Get the interface name.
|
||||
*/
|
||||
q = &name[0];
|
||||
while (*p != '\0' && *p != ':') {
|
||||
if (*p != ' ')
|
||||
*q++ = tolower(*p++);
|
||||
else
|
||||
p++;
|
||||
}
|
||||
*q = '\0';
|
||||
|
||||
(void)fclose(proc_dag_f);
|
||||
return (ret);
|
||||
/*
|
||||
* Add an entry for this interface, with no addresses.
|
||||
*/
|
||||
p[strlen(p) - 1] = '\0'; /* get rid of \n */
|
||||
if (pcap_add_if(devlistp, name, 0, strdup(p + 2), errbuf) == -1) {
|
||||
/*
|
||||
* Failure.
|
||||
*/
|
||||
ret = -1;
|
||||
break;
|
||||
}
|
||||
}
|
||||
if (ret != -1) {
|
||||
/*
|
||||
* Well, we didn't fail for any other reason; did we
|
||||
* fail due to an error reading the file?
|
||||
*/
|
||||
if (ferror(proc_dag_f)) {
|
||||
(void)snprintf(errbuf, PCAP_ERRBUF_SIZE,
|
||||
"Error reading /proc/dag: %s",
|
||||
pcap_strerror(errno));
|
||||
ret = -1;
|
||||
}
|
||||
}
|
||||
|
||||
(void)fclose(proc_dag_f);
|
||||
return (ret);
|
||||
}
|
||||
|
||||
/*
|
||||
|
|
@ -620,31 +642,35 @@ dag_platform_finddevs(pcap_if_t **devlistp, char *errbuf)
|
|||
* no attempt to store the filter in kernel memory as that is not supported
|
||||
* with DAG cards.
|
||||
*/
|
||||
static int dag_setfilter(pcap_t *p, struct bpf_program *fp) {
|
||||
if (!p)
|
||||
return -1;
|
||||
if (!fp) {
|
||||
strncpy(p->errbuf, "setfilter: No filter specified",
|
||||
sizeof(p->errbuf));
|
||||
return -1;
|
||||
}
|
||||
static int
|
||||
dag_setfilter(pcap_t *p, struct bpf_program *fp)
|
||||
{
|
||||
if (!p)
|
||||
return -1;
|
||||
if (!fp) {
|
||||
strncpy(p->errbuf, "setfilter: No filter specified",
|
||||
sizeof(p->errbuf));
|
||||
return -1;
|
||||
}
|
||||
|
||||
/* Make our private copy of the filter */
|
||||
/* Make our private copy of the filter */
|
||||
|
||||
if (install_bpf_program(p, fp) < 0) {
|
||||
snprintf(p->errbuf, sizeof(p->errbuf),
|
||||
"malloc: %s", pcap_strerror(errno));
|
||||
return -1;
|
||||
}
|
||||
if (install_bpf_program(p, fp) < 0) {
|
||||
snprintf(p->errbuf, sizeof(p->errbuf),
|
||||
"malloc: %s", pcap_strerror(errno));
|
||||
return -1;
|
||||
}
|
||||
|
||||
p->md.use_bpf = 0;
|
||||
p->md.use_bpf = 0;
|
||||
|
||||
return (0);
|
||||
return (0);
|
||||
}
|
||||
|
||||
static int
|
||||
dag_set_datalink(pcap_t *p, int dlt)
|
||||
{
|
||||
p->linktype = dlt;
|
||||
|
||||
return (0);
|
||||
}
|
||||
|
||||
|
|
@ -671,61 +697,66 @@ dag_setnonblock(pcap_t *p, int nonblock, char *errbuf)
|
|||
static int
|
||||
dag_get_datalink(pcap_t *p)
|
||||
{
|
||||
/* Check the type through a dagapi call.
|
||||
*/
|
||||
switch(dag_linktype(p->fd)) {
|
||||
case TYPE_HDLC_POS: {
|
||||
dag_record_t *record;
|
||||
int daglinktype;
|
||||
|
||||
/* peek at the first available record to see if it is PPP */
|
||||
while ((p->md.dag_mem_top - p->md.dag_mem_bottom) < (dag_record_size + 4)) {
|
||||
p->md.dag_mem_top = dag_offset(p->fd, &(p->md.dag_mem_bottom), 0);
|
||||
}
|
||||
record = (dag_record_t *)(p->md.dag_mem_base + p->md.dag_mem_bottom);
|
||||
if (p->dlt_list == NULL && (p->dlt_list = malloc(2*sizeof(*(p->dlt_list)))) == NULL) {
|
||||
(void)snprintf(p->errbuf, sizeof(p->errbuf), "malloc: %s", pcap_strerror(errno));
|
||||
return (-1);
|
||||
}
|
||||
|
||||
if ((ntohl(record->rec.pos.hdlc) & 0xffff0000) == 0xff030000) {
|
||||
p->linktype = DLT_PPP_SERIAL;
|
||||
fprintf(stderr, "Set DAG linktype to %d (DLT_PPP_SERIAL)\n", linktype);
|
||||
} else {
|
||||
p->linktype = DLT_CHDLC;
|
||||
fprintf(stderr, "Set DAG linktype to %d (DLT_CHDLC)\n", linktype);
|
||||
}
|
||||
break;
|
||||
}
|
||||
case TYPE_ETH:
|
||||
p->linktype = DLT_EN10MB;
|
||||
/*
|
||||
* This is (presumably) a real Ethernet capture; give it a
|
||||
* link-layer-type list with DLT_EN10MB and DLT_DOCSIS, so
|
||||
* that an application can let you choose it, in case you're
|
||||
* capturing DOCSIS traffic that a Cisco Cable Modem
|
||||
* Termination System is putting out onto an Ethernet (it
|
||||
* doesn't put an Ethernet header onto the wire, it puts raw
|
||||
* DOCSIS frames out on the wire inside the low-level
|
||||
* Ethernet framing).
|
||||
*/
|
||||
p->dlt_list = (u_int *) malloc(sizeof(u_int) * 2);
|
||||
/*
|
||||
* If that fails, just leave the list empty.
|
||||
*/
|
||||
if (p->dlt_list != NULL) {
|
||||
p->dlt_list[0] = DLT_EN10MB;
|
||||
p->dlt_list[1] = DLT_DOCSIS;
|
||||
p->dlt_count = 2;
|
||||
}
|
||||
fprintf(stderr, "Set DAG linktype to %d (DLT_EN10MB)\n", linktype);
|
||||
break;
|
||||
case TYPE_ATM:
|
||||
p->linktype = DLT_ATM_RFC1483;
|
||||
fprintf(stderr, "Set DAG linktype to %d (DLT_ATM_RFC1483)\n", linktype);
|
||||
break;
|
||||
case TYPE_LEGACY:
|
||||
p->linktype = DLT_NULL;
|
||||
fprintf(stderr, "Set DAG linktype to %d (DLT_NULL)\n", linktype);
|
||||
break;
|
||||
default:
|
||||
fprintf(stderr, "Unknown DAG linktype %d\n", dag_linktype(p->fd));
|
||||
return -1;;
|
||||
}
|
||||
return 0;
|
||||
/* Check the type through a dagapi call. */
|
||||
daglinktype = dag_linktype(p->fd);
|
||||
|
||||
switch(daglinktype) {
|
||||
|
||||
case TYPE_HDLC_POS:
|
||||
if (p->dlt_list != NULL) {
|
||||
p->dlt_count = 2;
|
||||
p->dlt_list[0] = DLT_CHDLC;
|
||||
p->dlt_list[1] = DLT_PPP_SERIAL;
|
||||
}
|
||||
p->linktype = DLT_CHDLC;
|
||||
break;
|
||||
|
||||
case TYPE_ETH:
|
||||
/*
|
||||
* This is (presumably) a real Ethernet capture; give it a
|
||||
* link-layer-type list with DLT_EN10MB and DLT_DOCSIS, so
|
||||
* that an application can let you choose it, in case you're
|
||||
* capturing DOCSIS traffic that a Cisco Cable Modem
|
||||
* Termination System is putting out onto an Ethernet (it
|
||||
* doesn't put an Ethernet header onto the wire, it puts raw
|
||||
* DOCSIS frames out on the wire inside the low-level
|
||||
* Ethernet framing).
|
||||
*/
|
||||
if (p->dlt_list != NULL) {
|
||||
p->dlt_count = 2;
|
||||
p->dlt_list[0] = DLT_EN10MB;
|
||||
p->dlt_list[1] = DLT_DOCSIS;
|
||||
}
|
||||
p->linktype = DLT_EN10MB;
|
||||
break;
|
||||
|
||||
case TYPE_AAL5:
|
||||
case TYPE_ATM:
|
||||
if (p->dlt_list != NULL) {
|
||||
p->dlt_count = 2;
|
||||
p->dlt_list[0] = DLT_ATM_RFC1483;
|
||||
p->dlt_list[1] = DLT_SUNATM;
|
||||
}
|
||||
p->linktype = DLT_ATM_RFC1483;
|
||||
break;
|
||||
|
||||
|
||||
case TYPE_LEGACY:
|
||||
p->linktype = DLT_NULL;
|
||||
break;
|
||||
|
||||
default:
|
||||
snprintf(p->errbuf, sizeof(p->errbuf), "unknown DAG linktype %d\n", daglinktype);
|
||||
return (-1);
|
||||
|
||||
}
|
||||
|
||||
return p->linktype;
|
||||
}
|
||||
|
|
|
|||
Reference in New Issue