diff options
| -rw-r--r-- | trafgen_proto.c | 32 | ||||
| -rw-r--r-- | trafgen_proto.h | 3 |
2 files changed, 35 insertions, 0 deletions
diff --git a/trafgen_proto.c b/trafgen_proto.c index 4976e54..2c090b2 100644 --- a/trafgen_proto.c +++ b/trafgen_proto.c @@ -5,6 +5,7 @@ #include <stddef.h> #include <string.h> +#include <netinet/in.h> #include <linux/if_ether.h> #include "dev.h" @@ -321,6 +322,37 @@ void proto_field_set_default_dev_mac(struct proto_hdr *hdr, uint32_t fid) __proto_field_set_dev_mac(hdr, fid, true); } +static void __proto_field_set_dev_ipv4(struct proto_hdr *hdr, uint32_t fid, + bool is_default) +{ + struct sockaddr_storage ss = { }; + struct sockaddr_in *ss4; + uint32_t ip_addr; + int ret; + + if (proto_field_is_set(hdr, fid)) + return; + + ret = device_address(hdr->ctx->dev, AF_INET, &ss); + if (ret < 0) + panic("Could not get device IPv4 address\n"); + + ss4 = (struct sockaddr_in *) &ss; + ip_addr = ss4->sin_addr.s_addr; + + __proto_field_set_bytes(hdr, fid, (uint8_t *)&ip_addr, is_default, false); +} + +void proto_field_set_dev_ipv4(struct proto_hdr *hdr, uint32_t fid) +{ + __proto_field_set_dev_ipv4(hdr, fid, false); +} + +void proto_field_set_default_dev_ipv4(struct proto_hdr *hdr, uint32_t fid) +{ + __proto_field_set_dev_ipv4(hdr, fid, true); +} + void protos_init(const char *dev) { struct proto_hdr *p; diff --git a/trafgen_proto.h b/trafgen_proto.h index 517b278..0267cf6 100644 --- a/trafgen_proto.h +++ b/trafgen_proto.h @@ -97,4 +97,7 @@ extern void proto_field_set_default_be32(struct proto_hdr *hdr, uint32_t fid, extern void proto_field_set_dev_mac(struct proto_hdr *hdr, uint32_t fid); extern void proto_field_set_default_dev_mac(struct proto_hdr *hdr, uint32_t fid); +extern void proto_field_set_dev_ipv4(struct proto_hdr *hdr, uint32_t fid); +extern void proto_field_set_default_dev_ipv4(struct proto_hdr *hdr, uint32_t fid); + #endif /* TRAFGEN_PROTO_I_H */ |