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#ifndef _LIBNFQUEUE_TCP_H_
#define _LIBNFQUEUE_TCP_H_
struct pkt_buff;
struct tcphdr *nfq_tcp_get_hdr(struct pkt_buff *pktb);
void *nfq_tcp_get_payload(struct tcphdr *tcph, struct pkt_buff *pktb);
unsigned int nfq_tcp_get_payload_len(struct tcphdr *tcph, struct pkt_buff *pktb);
struct iphdr;
struct ip6_hdr;
void nfq_tcp_compute_checksum_ipv4(struct tcphdr *tcph, struct iphdr *iph);
void nfq_tcp_compute_checksum_ipv6(struct tcphdr *tcph, struct ip6_hdr *ip6h);
int nfq_tcp_snprintf(char *buf, size_t size, const struct tcphdr *tcp);
#endif
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