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Added token ring network support.

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This commit is contained in:
pdw
2002-10-31 16:53:32 +00:00
parent ea08b52871
commit 0bd117e39d
8 changed files with 433 additions and 5 deletions
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61
iftop.c
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@@ -30,6 +30,10 @@
#include "ether.h"
#include "ip.h"
#include "tcp.h"
#include "token.h"
#include "llc.h"
#include "extract.h"
#include "ethertype.h"
unsigned char if_hw_addr[6]; /* ethernet address of interface. */
@@ -257,6 +261,59 @@ static void handle_raw_packet(unsigned char* args, const struct pcap_pkthdr* pkt
handle_ip_packet((struct ip*)packet, -1);
}
static void handle_llc_packet(const struct llc* llc, int dir) {
struct ip* ip = (struct ip*)((void*)llc + sizeof(struct llc));
/* Taken from tcpdump/print-llc.c */
if(llc->ssap == LLCSAP_SNAP && llc->dsap == LLCSAP_SNAP
&& llc->llcui == LLC_UI) {
u_int32_t orgcode;
register u_short et;
orgcode = EXTRACT_24BITS(&llc->llc_orgcode[0]);
et = EXTRACT_16BITS(&llc->llc_ethertype[0]);
switch(orgcode) {
case OUI_ENCAP_ETHER:
case OUI_CISCO_90:
handle_ip_packet(ip, dir);
break;
case OUI_APPLETALK:
if(et == ETHERTYPE_ATALK) {
handle_ip_packet(ip, dir);
}
break;
default:
/* Not a lot we can do */
}
}
}
static void handle_tokenring_packet(unsigned char* args, const struct pcap_pkthdr* pkthdr, const unsigned char* packet)
{
struct token_header *trp;
int dir = -1;
trp = (struct token_header *)packet;
if(IS_SOURCE_ROUTED(trp)) {
packet += RIF_LENGTH(trp);
}
packet += TOKEN_HDRLEN;
if(memcmp(trp->token_shost, if_hw_addr, 6) == 0 ) {
/* packet leaving this i/f */
dir = 1;
}
else if(memcmp(trp->token_dhost, if_hw_addr, 6) == 0 || memcmp("\xFF\xFF\xFF\xFF\xFF\xFF", trp->token_dhost, 6) == 0) {
/* packet entering this i/f */
dir = 0;
}
/* Only know how to deal with LLC encapsulated packets */
if(FRAME_TYPE(trp) == TOKEN_FC_LLC) {
handle_llc_packet((struct llc*)packet, dir);
}
}
#ifdef DLT_LINUX_SLL
static void handle_cooked_packet(unsigned char *args, const struct pcap_pkthdr * thdr, const unsigned char * packet)
{
@@ -367,6 +424,7 @@ void packet_init() {
resolver_initialise();
pd = pcap_open_live(options.interface, CAPTURE_LENGTH, options.promiscuous, 1000, errbuf);
// DEBUG: pd = pcap_open_offline("tcpdump.out", errbuf);
if(pd == NULL) {
fprintf(stderr, "pcap_open_live(%s): %s\n", options.interface, errbuf);
exit(1);
@@ -378,6 +436,9 @@ void packet_init() {
else if(dlt == DLT_RAW) {
packet_handler = handle_raw_packet;
}
else if(dlt == DLT_IEEE802) {
packet_handler = handle_tokenring_packet;
}
/*
* SLL support not available in older libpcaps
*/