72 lines
1.3 KiB
C
72 lines
1.3 KiB
C
#ifndef _IPV4_HELPERS_H
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#define _IPV4_HELPERS_H
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#ifdef __cpluscplus
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extern "C"
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{
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#endif
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#include <arpa/inet.h>
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#include <netinet/ip.h>
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static inline uint16_t ipv4_hdr_get_ipid(const struct ip *hdr)
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{
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return ntohs(hdr->ip_id);
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}
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static inline uint8_t ipv4_hdr_get_flags(const struct ip *hdr)
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{
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return (ntohs(hdr->ip_off) & IP_OFFMASK) >> 13;
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}
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static inline uint16_t ipv4_hdr_get_frag_offset(const struct ip *hdr)
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{
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return ntohs(hdr->ip_off) & IP_OFFMASK;
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}
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static inline uint8_t ipv4_hdr_get_ttl(const struct ip *hdr)
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{
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return hdr->ip_ttl;
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}
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static inline uint8_t ipv4_hdr_get_protocol(const struct ip *hdr)
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{
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return hdr->ip_p;
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}
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static inline uint16_t ipv4_hdr_get_checksum(const struct ip *hdr)
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{
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return ntohs(hdr->ip_sum);
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}
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static inline uint32_t ipv4_hdr_get_src(const struct ip *hdr)
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{
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return ntohl(hdr->ip_src.s_addr);
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}
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static inline uint32_t ipv4_hdr_get_dst(const struct ip *hdr)
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{
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return ntohl(hdr->ip_dst.s_addr);
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}
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static inline bool ipv4_hdr_has_flag_rf(const struct ip *hdr)
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{
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return (ntohs(hdr->ip_off) & IP_RF) != 0;
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}
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static inline bool ipv4_hdr_has_flag_df(const struct ip *hdr)
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{
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return (ntohs(hdr->ip_off) & IP_DF) != 0;
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}
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static inline bool ipv4_hdr_has_flag_mf(const struct ip *hdr)
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{
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return (ntohs(hdr->ip_off) & IP_MF) != 0;
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}
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#ifdef __cpluscplus
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}
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#endif
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#endif
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