mirror of https://github.com/dirtbags/fluffy.git
78 lines
2.0 KiB
C
78 lines
2.0 KiB
C
#ifndef __PCAP_H__
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#define __PCAP_H__
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#include <stdio.h>
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#include <stdint.h>
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#include <stdbool.h>
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#define MAGIC 0xa1b2c3d4
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#define MAXFRAME 262144
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/*
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* Described at http://www.tcpdump.org/linktypes.html
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*/
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#define LINKTYPE_ETHERNET 1
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#define LINKTYPE_RAW 101
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struct pcap_file {
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FILE *f;
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uint32_t linktype;
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bool swap;
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};
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struct pcap_file_header {
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uint32_t magic;
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uint16_t version_major;
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uint16_t version_minor;
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int32_t thiszone; /* gmt to local correction */
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uint32_t sigfigs; /* accuracy of timestamps */
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int32_t snaplen; /* max length saved portion of each pkt */
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int32_t linktype; /* data link type (LINKTYPE_*) */
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};
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struct pcap_pkthdr {
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struct pcap_timeval {
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uint32_t tv_sec;
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uint32_t tv_usec;
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} ts; /* time stamp */
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uint32_t caplen; /* length of portion present */
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uint32_t len; /* length this packet (off wire) */
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};
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#ifndef max
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#define max(a, b) ((a)>(b)?(a):(b))
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#endif
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#ifndef min
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#define min(a, b) ((a)<(b)?(a):(b))
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#endif
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#define bswap32(i) (((i & 0xff000000) >> 030) | \
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((i & 0x00ff0000) >> 010) | \
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((i & 0x0000ff00) << 010) | \
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((i & 0x000000ff) << 030))
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#define bswap16(i) (((i & 0xff00) >> 010) | \
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((i & 0x00ff) << 010))
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/*
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* Debugging help
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*/
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#define DUMPf(fmt, args...) fprintf(stderr, "%s:%s:%d " fmt "\n", __FILE__, __FUNCTION__, __LINE__, ##args)
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#define DUMP() DUMPf("")
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#define DUMP_d(v) DUMPf("%s = %d", #v, v)
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#define DUMP_u(v) DUMPf("%s = %u", #v, v)
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#define DUMP_x(v) DUMPf("%s = 0x%x", #v, v)
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#define DUMP_s(v) DUMPf("%s = %s", #v, v)
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#define DUMP_c(v) DUMPf("%s = %c", #v, v)
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#define DUMP_p(v) DUMPf("%s = %p", #v, v)
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int pcap_open_in(struct pcap_file *ctx, FILE * f);
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int pcap_open_out(struct pcap_file *ctx, FILE * f);
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int pcap_open_out_linktype(struct pcap_file *ctx, FILE * f, int32_t linktype);
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int pcap_read_pkthdr(struct pcap_file *ctx, struct pcap_pkthdr *hdr);
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int pcap_write_pkthdr(struct pcap_file *ctx, struct pcap_pkthdr *hdr);
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void pcap_close(struct pcap_file *ctx);
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#endif /* __PCAP_H__ */
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