bsd/net/pf_norm.c

2090 	struct tcphdr	*th = pd->hdr.tcp;
2099 	sxport.port = th->th_sport;
2100 	dxport.port = th->th_dport;
2128 		    !pf_osfp_match(pf_osfp_fingerprint(pd, m, off, th),
2155 	flags = th->th_flags;
2176 	if (th->th_off < (sizeof (struct tcphdr) >> 2))
2180 	if (flags != th->th_flags || th->th_x2 != 0) {
2183 		ov = *(u_int16_t *)(&th->th_ack + 1);
2184 		th->th_flags = flags;
2185 		th->th_x2 = 0;
2186 		nv = *(u_int16_t *)(&th->th_ack + 1);
2188 		th->th_sum = pf_cksum_fixup(th->th_sum, ov, nv, 0);
2193 	if (!(flags & TH_URG) && th->th_urp) {
2194 		th->th_sum = pf_cksum_fixup(th->th_sum, th->th_urp, 0, 0);
2195 		th->th_urp = 0;
2202 		int rv = pf_normalize_tcpopt(r, dir, kif, pd, m, th, off,
2211 		    off + sizeof (*th));
2220 		m_copyback(mw, off, sizeof (*th), th);
2234     struct tcphdr *th, struct pf_state_peer *src, struct pf_state_peer *dst)
2270 	if ((th->th_flags & TH_SYN) == 0)
2274 	if (th->th_off > (sizeof (struct tcphdr) >> 2) && src->scrub &&
2275 	    pf_pull_hdr(m, off, hdr, th->th_off << 2, NULL, NULL, pd->af)) {
2279 		hlen = (th->th_off << 2) - sizeof (struct tcphdr);
2329     u_short *reason, struct tcphdr *th, struct pf_state *state,
2372 	if (th->th_off > (sizeof (struct tcphdr) >> 2) &&
2375 	    pf_pull_hdr(m, off, hdr, th->th_off << 2, NULL, NULL, pd->af)) {
2379 		hlen = (th->th_off << 2) - sizeof (struct tcphdr);
2412 						    &th->th_sum,
2428 						    &th->th_sum, htonl(tsecr),
2443 			int optoff = off + sizeof (*th);
2444 			int optlen = (th->th_off << 2) - sizeof (*th);
2451 			m_copyback(m, optoff, optlen, hdr + sizeof (*th));
2607 				pf_print_flags(th->th_flags);
2616 	} else if (!got_ts && (th->th_flags & TH_RST) == 0 &&
2618 	    || pd->p_len > 0 || (th->th_flags & TH_SYN)) &&
2658 				pf_print_flags(th->th_flags);
2688 				pf_print_flags(th->th_flags);
2729     struct pf_pdesc *pd, struct mbuf *m, struct tcphdr *th, int off,
2741 	thoff = th->th_off << 2;
2744 	if (cnt > 0 && !pf_pull_hdr(m, off + sizeof (*th), opts, cnt,
2772 					th->th_sum = pf_cksum_fixup(th->th_sum,
2788 		    off + sizeof (*th) + thoff);
2798 		m_copyback(mw, off + sizeof (*th), thoff - sizeof (*th), opts);