diff options
| author | Vadim Kochan <vadim4j@gmail.com> | 2016-02-08 08:01:52 +0200 |
|---|---|---|
| committer | Tobias Klauser <tklauser@distanz.ch> | 2016-02-23 13:19:34 +0100 |
| commit | 116835ed0d245f3e73173f2f2057265827416ce6 (patch) | |
| tree | 052f654f670d8ce6ce0251124bd130c3c05622f7 | |
| parent | f02fcdbd2cb4dc041783def773e446c179bd57f1 (diff) | |
trafgen: l2: Add MPLS header generation
Add support for MPLS header creating with fields:
Label, TClass, Bottom-Stack, TTL
By default S-field is set to 1 (last label), but resets to 0
if lower MPLS header is added.
Signed-off-by: Vadim Kochan <vadim4j@gmail.com>
Signed-off-by: Tobias Klauser <tklauser@distanz.ch>
| -rw-r--r-- | trafgen_l2.c | 32 | ||||
| -rw-r--r-- | trafgen_l2.h | 7 | ||||
| -rw-r--r-- | trafgen_proto.h | 1 |
3 files changed, 40 insertions, 0 deletions
diff --git a/trafgen_l2.c b/trafgen_l2.c index a7387b8..e6c5b59 100644 --- a/trafgen_l2.c +++ b/trafgen_l2.c @@ -26,6 +26,8 @@ static uint16_t pid_to_eth(enum proto_id pid) return ETH_P_IP; case PROTO_IP6: return ETH_P_IPV6; + case PROTO_MPLS: + return ETH_P_MPLS_UC; case PROTO_VLAN: return ETH_P_8021Q; default: @@ -137,9 +139,39 @@ static struct proto_hdr arp_hdr = { .header_init = arp_header_init, }; +static struct proto_field mpls_fields[] = { + { .id = MPLS_LABEL, .len = 4, .shift = 12, .mask = 0xfffff000 }, + { .id = MPLS_TC, .len = 4, .shift = 9, .mask = 0xe00 }, + { .id = MPLS_LAST, .len = 4, .shift = 8, .mask = 0x100 }, + { .id = MPLS_TTL, .len = 4, .shift = 0, .mask = 0xff }, +}; + +static void mpls_header_init(struct proto_hdr *hdr) +{ + proto_lower_default_add(hdr, PROTO_ETH); + + proto_header_fields_add(hdr, mpls_fields, array_size(mpls_fields)); + + proto_field_set_default_be32(hdr, MPLS_LAST, 1); +} + +static void mpls_set_next_proto(struct proto_hdr *hdr, enum proto_id pid) +{ + if (pid == PROTO_MPLS) + proto_field_set_default_be32(hdr, MPLS_LAST, 0); +} + +static struct proto_hdr mpls_hdr = { + .id = PROTO_MPLS, + .layer = PROTO_L2, + .header_init = mpls_header_init, + .set_next_proto = mpls_set_next_proto, +}; + void protos_l2_init(void) { proto_header_register(ð_hdr); proto_header_register(&vlan_hdr); proto_header_register(&arp_hdr); + proto_header_register(&mpls_hdr); } diff --git a/trafgen_l2.h b/trafgen_l2.h index 9beb2aa..14f0e84 100644 --- a/trafgen_l2.h +++ b/trafgen_l2.h @@ -28,6 +28,13 @@ enum vlan_field { VLAN_ETYPE, }; +enum mpls_field { + MPLS_LABEL, + MPLS_TC, + MPLS_LAST, + MPLS_TTL, +}; + extern void protos_l2_init(void); #endif /* TRAFGEN_L2_H */ diff --git a/trafgen_proto.h b/trafgen_proto.h index 10ded79..31ac1c8 100644 --- a/trafgen_proto.h +++ b/trafgen_proto.h @@ -14,6 +14,7 @@ enum proto_id { PROTO_ETH, PROTO_VLAN, PROTO_ARP, + PROTO_MPLS, PROTO_IP4, PROTO_IP6, PROTO_UDP, |