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isisd: implement draft-ietf-isis-ext-eth and support p2p over LAN on BSD

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Signed-off-by: Christian Franke <chris@opensourcerouting.org>
This commit is contained in:
Christian Franke 2017-04-27 12:56:11 +02:00
parent 1b49e4f0ba
commit 316a98ecd1
3 changed files with 16 additions and 32 deletions
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33
isisd/isis_bpf.c
View File

@ -212,16 +212,11 @@ isis_sock_init (struct isis_circuit *circuit)
goto end;
}
if (circuit->circ_type == CIRCUIT_T_BROADCAST)
if (if_is_broadcast(circuit->interface))
{
circuit->tx = isis_send_pdu_bcast;
circuit->rx = isis_recv_pdu_bcast;
}
else if (circuit->circ_type == CIRCUIT_T_P2P)
{
circuit->tx = isis_send_pdu_p2p;
circuit->rx = isis_recv_pdu_p2p;
}
else
{
zlog_warn ("isis_sock_init(): unknown circuit type");
@ -283,23 +278,6 @@ isis_recv_pdu_bcast (struct isis_circuit *circuit, u_char * ssnpa)
return ISIS_OK;
}
int
isis_recv_pdu_p2p (struct isis_circuit *circuit, u_char * ssnpa)
{
int bytesread;
bytesread = stream_read (circuit->rcv_stream, circuit->fd,
circuit->interface->mtu);
if (bytesread < 0)
{
zlog_warn ("isis_recv_pdu_p2p(): read () failed: %s", safe_strerror (errno));
return ISIS_WARNING;
}
return ISIS_OK;
}
int
isis_send_pdu_bcast (struct isis_circuit *circuit, int level)
{
@ -327,7 +305,8 @@ isis_send_pdu_bcast (struct isis_circuit *circuit, int level)
else
memcpy (eth->ether_dhost, ALL_L2_ISS, ETHER_ADDR_LEN);
memcpy (eth->ether_shost, circuit->u.bc.snpa, ETHER_ADDR_LEN);
eth->ether_type = htons (stream_get_endp (circuit->snd_stream) + LLC_LEN);
size_t frame_size = stream_get_endp(circuit->snd_stream) + LLC_LEN;
eth->ether_type = htons(isis_ethertype(frame_size));
/*
* Then the LLC
@ -354,10 +333,4 @@ isis_send_pdu_bcast (struct isis_circuit *circuit, int level)
return ISIS_OK;
}
int
isis_send_pdu_p2p (struct isis_circuit *circuit, int level)
{
return ISIS_OK;
}
#endif /* ISIS_METHOD == ISIS_METHOD_BPF */

10
isisd/isis_constants.h
View File

@ -171,4 +171,14 @@
#define ETH_ALEN 6
#endif
#define MAX_LLC_LEN 0x5ff
#define ETHERTYPE_EXT_LLC 0x8870
static inline uint16_t isis_ethertype(size_t len)
{
if (len > MAX_LLC_LEN)
return ETHERTYPE_EXT_LLC;
return len;
}
#endif /* ISIS_CONSTANTS_H */

5
isisd/isis_pfpacket.c
View File

@ -371,7 +371,9 @@ isis_send_pdu_bcast (struct isis_circuit *circuit, int level)
stream_set_getp (circuit->snd_stream, 0);
memset (&sa, 0, sizeof (struct sockaddr_ll));
sa.sll_family = AF_PACKET;
sa.sll_protocol = htons (stream_get_endp (circuit->snd_stream) + LLC_LEN);
size_t frame_size = stream_get_endp(circuit->snd_stream) + LLC_LEN;
sa.sll_protocol = htons(isis_ethertype(frame_size));
sa.sll_ifindex = circuit->interface->ifindex;
sa.sll_halen = ETH_ALEN;
/* RFC5309 section 4.1 recommends ALL_ISS */
@ -418,7 +420,6 @@ isis_send_pdu_p2p (struct isis_circuit *circuit, int level)
stream_set_getp (circuit->snd_stream, 0);
memset (&sa, 0, sizeof (struct sockaddr_ll));
sa.sll_family = AF_PACKET;
sa.sll_protocol = htons (stream_get_endp (circuit->snd_stream) + LLC_LEN);
sa.sll_ifindex = circuit->interface->ifindex;
sa.sll_halen = ETH_ALEN;
if (level == 1)