diff options
Diffstat (limited to 'common/include/decode_ipv4.h')
| -rw-r--r-- | common/include/decode_ipv4.h | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/common/include/decode_ipv4.h b/common/include/decode_ipv4.h new file mode 100644 index 0000000..f3e3fa8 --- /dev/null +++ b/common/include/decode_ipv4.h @@ -0,0 +1,55 @@ +#ifndef _DECODE_IPV4_H +#define _DECODE_IPV4_H + +#ifdef __cpluscplus +extern "C" +{ +#endif + +#include "public.h" + +#define IPV4_HEADER_LEN 20 + + typedef struct ipv4_header_s + { + uint8_t ip_verhl; // version & header length + uint8_t ip_tos; + uint16_t ip_len; + uint16_t ip_id; + uint16_t ip_off; + uint8_t ip_ttl; + uint8_t ip_proto; + uint16_t ip_csum; + union + { + struct + { + struct in_addr ip_src; + struct in_addr ip_dst; + } ip4_un1; + uint16_t ip_addrs[4]; + } ip4_hdrun1; + } __attribute__((__packed__)) ipv4_header_t; + + typedef struct ipv4_info_s + { + char src_addr[INET_ADDRSTRLEN]; + char dst_addr[INET_ADDRSTRLEN]; + + ipv4_header_t *hdr; + uint8_t *payload; + uint8_t next_protocol; + + uint32_t hdr_len; + uint32_t opts_len; + uint32_t payload_len; + } ipv4_info_t; + + int decode_ipv4(ipv4_info_t *packet, const uint8_t *data, uint32_t len); + void dump_ipv4_info(uint32_t pkt_id, ipv4_info_t *packet); + +#ifdef __cpluscplus +} +#endif + +#endif
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