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monitor: Decode the EAPoL packet headers of PAE frames

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This commit is contained in:
Marcel Holtmann 2014-08-10 20:20:13 -07:00
parent 351208b642
commit a95c720d64
2 changed files with 55 additions and 6 deletions
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5
monitor/main.c
View File

@ -187,14 +187,15 @@ static int process_pcap(struct pcap *pcap)
switch (proto_type) { switch (proto_type) {
case ETH_P_PAE: case ETH_P_PAE:
nlmon_print_pae(nlmon, &tv, pkt_type, -1, nlmon_print_pae(nlmon, &tv, pkt_type, -1,
buf, len); buf + 16, len - 16);
break; break;
} }
break; break;
case ARPHRD_NETLINK: case ARPHRD_NETLINK:
switch (proto_type) { switch (proto_type) {
case NETLINK_ROUTE: case NETLINK_ROUTE:
nlmon_print_rtnl(nlmon, &tv, buf, len); nlmon_print_rtnl(nlmon, &tv,
buf + 16, len - 16);
break; break;
case NETLINK_GENERIC: case NETLINK_GENERIC:
nlmon_print_genl(nlmon, &tv, nlmon_print_genl(nlmon, &tv,

56
monitor/nlmon.c
View File

@ -1682,15 +1682,63 @@ void nlmon_print_pae(struct nlmon *nlmon, const struct timeval *tv,
uint8_t type, int index, uint8_t type, int index,
const void *data, uint32_t size) const void *data, uint32_t size)
{ {
char str[16]; uint8_t eapol_ver, eapol_type;
uint16_t eapol_len;
char extra_str[16];
const char *str;
sprintf(str, "len %u", size); sprintf(extra_str, "len %u", size);
print_packet(tv, (type == PACKET_HOST) ? '>' : '<', print_packet(tv, (type == PACKET_HOST) ? '>' : '<',
COLOR_YELLOW, "PAE Packet", str, ""); COLOR_YELLOW, "PAE Packet", extra_str, "");
if (index >= 0) if (index >= 0)
print_attr(0, "Interface Index: %u", index); print_attr(0, "Interface Index: %u", index);
print_hexdump(0, data, size);
if (size < 4)
return;
eapol_ver = *((const uint8_t *) data);
eapol_type = *((const uint8_t *) (data + 1));
eapol_len = L_GET_UNALIGNED((const uint16_t *) (data + 2));
eapol_len = L_BE16_TO_CPU(eapol_len);
print_attr(0, "EAPoL: len %u", eapol_len);
switch (eapol_ver) {
case 0x01:
str = "802.11X-2001";
break;
case 0x02:
str = "802.11X-2004";
break;
default:
str = "Reserved";
break;
}
print_attr(1, "Version: %s (%u)", str, eapol_ver);
switch (eapol_type) {
case 0x00:
str = "Packet";
break;
case 0x01:
str = "Start";
break;
case 0x02:
str = "Logoff";
break;
case 0x03:
str = "Key";
break;
default:
str = "Reserved";
break;
}
print_attr(1, "Type: %s (%u)", str, eapol_type);
print_hexdump(1, data + 4, size - 4);
} }
static bool pae_receive(struct l_io *io, void *user_data) static bool pae_receive(struct l_io *io, void *user_data)