diff options
| author | Vadim Kochan <vadim4j@gmail.com> | 2016-02-01 19:01:37 +0200 |
|---|---|---|
| committer | Tobias Klauser <tklauser@distanz.ch> | 2016-02-02 16:54:47 +0100 |
| commit | a7f35557331a283f4064c578f76be6330d54eaf4 (patch) | |
| tree | d49ce92fb34fab66e613b70dc2d9dd600ebb14e5 /trafgen_l2.c | |
| parent | 826a16efdd760930eb2cb21ae80c49a9d7d096f4 (diff) | |
trafgen: eth: Add setting next protocol id
Move setting next protocol id field from higher protocols (ARP, IPv4)
to Ethernet. It makes code little more generic w/o checking each lower
protocol and setting specific field id.
Signed-off-by: Vadim Kochan <vadim4j@gmail.com>
Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
Diffstat (limited to 'trafgen_l2.c')
| -rw-r--r-- | trafgen_l2.c | 24 |
1 files changed, 23 insertions, 1 deletions
diff --git a/trafgen_l2.c b/trafgen_l2.c index 529dc36..c0e92a3 100644 --- a/trafgen_l2.c +++ b/trafgen_l2.c @@ -6,6 +6,7 @@ #include <net/if_arp.h> #include <linux/if_ether.h> +#include "die.h" #include "built_in.h" #include "trafgen_l2.h" #include "trafgen_proto.h" @@ -16,6 +17,27 @@ static struct proto_field eth_fields[] = { { .id = ETH_TYPE, .len = 2, .offset = 12 }, }; +static void eth_set_next_proto(struct proto_hdr *hdr, enum proto_id pid) +{ + uint16_t eth_type; + + switch(pid) { + case PROTO_ARP: + eth_type = ETH_P_ARP; + break; + case PROTO_IP4: + eth_type = ETH_P_IP; + break; + case PROTO_IP6: + eth_type = ETH_P_IPV6; + break; + default: + panic("eth: Not supported protocol id %u\n", pid); + } + + proto_field_set_default_be16(hdr, ETH_TYPE, eth_type); +} + static void eth_header_init(struct proto_hdr *hdr) { proto_header_fields_add(hdr, eth_fields, array_size(eth_fields)); @@ -27,6 +49,7 @@ static struct proto_hdr eth_hdr = { .id = PROTO_ETH, .layer = PROTO_L2, .header_init = eth_header_init, + .set_next_proto = eth_set_next_proto, }; static struct proto_field arp_fields[] = { @@ -51,7 +74,6 @@ static void arp_header_init(struct proto_hdr *hdr) uint8_t bcast[6] = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff }; proto_field_set_default_bytes(lower, ETH_DST_ADDR, bcast); - proto_field_set_default_be16(lower, ETH_TYPE, ETH_P_ARP); } proto_header_fields_add(hdr, arp_fields, array_size(arp_fields)); |