49 lines
1.2 KiB
C
49 lines
1.2 KiB
C
#ifndef _PACKET_H_
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#define _PACKET_H_
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#include <arpa/inet.h>
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#include <netinet/ip.h>
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#include <netinet/ip6.h>
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#define IPPROTO_HIDE_EID 99
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struct packet {
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union {
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#ifdef __USE_BSD
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struct ip ip;
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#else
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struct iphdr ip;
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#endif
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struct ip6_hdr ip6;
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} hdr;
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char payload[IP_MAXPACKET]; /* payload is this - header size, but OK */
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};
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// wrapper.c expects this name
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#define recv_pkt packet
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// It's all our code that uses this. 12 is much more than we need to
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// construct a wrapped packet at the moment.
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//
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// initial usage:
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// 0 - wrapping ip header, including enc_size
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// 1 - encrypted portion of payload, in scratch.
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// 2 - unencrypted portion of payload, in recv_pkt
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#define MAX_IOVS 12
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struct rsp_data {
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int count;
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struct iovec iovs[MAX_IOVS];
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unsigned char scratch[IP_MAXPACKET]; // somewhere easy to put results
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};
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void compute_ip_checksum( struct iphdr* pkt );
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int wrap_ipv4_packet(struct rlocs* reg, struct recv_pkt* pkt, struct rsp_data* out);
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int wrap_ipv6_packet(struct rlocs* reg, struct recv_pkt* pkt, struct rsp_data* out);
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int unwrap_ipv4_packet(struct rlocs* reg, struct recv_pkt* pkt, struct rsp_data* out);
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int unwrap_ipv6_packet(struct rlocs* reg, struct recv_pkt* pkt, struct rsp_data* out);
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#endif
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