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monitor: Receive Preauthentication frames and log them

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Use the same packet filter as in eapol.c
This commit is contained in:
Andrew Zaborowski 2017-04-15 13:58:53 +02:00 committed by Denis Kenzior
parent e05bfc5f98
commit a01e57d1b2
1 changed files with 8 additions and 10 deletions
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18
monitor/nlmon.c
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@ -5192,9 +5192,6 @@ static bool pae_receive(struct l_io *io, void *user_data)
return true;
}
if (sll.sll_protocol != htons(ETH_P_PAE))
return true;
if (sll.sll_hatype != ARPHRD_ETHER)
return true;
@ -5207,8 +5204,8 @@ static bool pae_receive(struct l_io *io, void *user_data)
}
}
store_packet(nlmon, tv, sll.sll_pkttype, ARPHRD_ETHER, ETH_P_PAE,
buf, bytes_read);
store_packet(nlmon, tv, sll.sll_pkttype, ARPHRD_ETHER,
ntohs(sll.sll_protocol), buf, bytes_read);
nlmon_print_pae(nlmon, tv, sll.sll_pkttype, sll.sll_ifindex,
buf, bytes_read);
@ -5218,18 +5215,19 @@ static bool pae_receive(struct l_io *io, void *user_data)
/*
* BPF filter to match skb->dev->type == 1 (ARPHRD_ETHER) and
* match skb->protocol == 0x888e (PAE).
* match skb->protocol == 0x888e (PAE) or 0x88c7 (preauthentication).
*/
static struct sock_filter pae_filter[] = {
{ 0x28, 0, 0, 0xfffff01c }, /* ldh #hatype */
{ 0x15, 0, 3, 0x00000001 }, /* jne #1, drop */
{ 0x15, 0, 4, 0x00000001 }, /* jne #1, drop */
{ 0x28, 0, 0, 0xfffff000 }, /* ldh #proto */
{ 0x15, 0, 1, 0x0000888e }, /* jne #0x888e, drop */
{ 0x06, 0, 0, 0xffffffff }, /* ret #-1 */
{ 0x15, 1, 0, 0x0000888e }, /* je #0x888e, keep */
{ 0x15, 0, 1, 0x000088c7 }, /* jne #0x88c7, drop */
{ 0x06, 0, 0, 0xffffffff }, /* keep: ret #-1 */
{ 0x06, 0, 0, 0000000000 }, /* drop: ret #0 */
};
static const struct sock_fprog pae_fprog = { .len = 6, .filter = pae_filter };
static const struct sock_fprog pae_fprog = { .len = 7, .filter = pae_filter };
static struct l_io *open_pae(void)
{