IpHeader Struct Reference

IPv4 header. More...

#include <mitigator_bpf.h>

Detailed Description

IPv4 header.

Access the header as follows:

struct IpHeader* ip = packet_network_header(ctx);

Note

This function is for advanced users. Prefer packet_flow() to get addresses. Prefer packet_transport_payload() to access payload and its length.

If you modify the fields of this header and return RESULT_PASS from the filter, call set_packet_mangled() to update checksums.

See also

packet_network_proto() to test if IPv4 header is present.

https://en.wikipedia.org/wiki/IPv4#Packet_structure

https://tools.ietf.org/html/rfc791

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The documentation for this struct was generated from the following file:

• mitigator_bpf.h