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support DLT_LINUX_SLL #1

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support DLT_LINUX_SLL #1

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9 changes: 7 additions & 2 deletions src/network.c
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Original file line number Diff line number Diff line change
Expand Up @@ -5,6 +5,7 @@
#include "network.h"
#include "common.h"

int size_eth;
/* Initializes pcap */
pcap_t *initialize_network(char *iface, char *filter, int type)
{
Expand All @@ -31,6 +32,11 @@ pcap_t *initialize_network(char *iface, char *filter, int type)
fprintf(stderr, "ERROR: Failed to open device %s: %s\n", iface, errbuf);
return NULL;
}
size_eth = sizeof(struct sniff_ethernet);
#ifdef DLT_LINUX_SLL
if(pcap_datalink(handle) == DLT_LINUX_SLL)
size_eth += 2;
#endif
}

if (pcap_compile(handle, &fp, filter, 0, net) == -1)
Expand All @@ -57,7 +63,7 @@ char *process_packet(const u_char *packet, struct pcap_pkthdr *header)
u_char *tls_record = NULL;
u_char *tls_handshake = NULL;
short tls_record_size = 0;
int size_ip = 0, size_tcp = 0, size_eth = 0, offset = 0, payload_size = 0, cert_size = 0;
int size_ip = 0, size_tcp = 0, offset = 0, payload_size = 0, cert_size = 0;
const u_char *payload = NULL;
char *fingerprint = NULL;
unsigned char md[SHA_DIGEST_LENGTH] = { 0 };
Expand All @@ -68,7 +74,6 @@ char *process_packet(const u_char *packet, struct pcap_pkthdr *header)
}

//ethernet = (struct sniff_ethernet*)(packet);
size_eth = sizeof(struct sniff_ethernet);

ip = (struct sniff_ip*)(packet + size_eth);
size_ip = IP_HL(ip)*4;
Expand Down