bsd/netinet/tcp_input.c

301 static inline void update_iaj_state(struct tcpcb *tp, uint32_t tlen, int reset_size);
310 	struct tcpopt *to, u_int32_t tlen);
1091 	int len, tlen, off;
1162 		tlen = sizeof(*ip6) + ntohs(ip6->ip6_plen) - off0;
1176 				if (in6_cksum(m, IPPROTO_TCP, off0, tlen)) {
1194 			if (in6_cksum(m, IPPROTO_TCP, off0, tlen)) {
1255 	tlen = ip->ip_len;
1267 			ipov->ih_len = (u_short)tlen;
1291 		ipov->ih_len = (u_short)tlen;
1295 		len = sizeof (struct ip) + tlen;
1306 		if (lrodebug) printf("tcp_input: bad xsum len = %d, tlen = %d, flags = %x, csum_flags = %x.\n",len, tlen, m->m_flags, m->m_pkthdr.csum_flags);
1330 	if (off < sizeof (struct tcphdr) || off > tlen) {
1338 	tlen -= off;	/* tlen is used instead of ti->ti_len */
2002 	if (tp->t_state == TCPS_ESTABLISHED && tlen > 0) {
2005 			tp->rcv_byps += tlen + off;
2035 			tp->rcv_byps = tlen + off;
2054 			tp->rcv_by_unackwin += (tlen + off);
2057 			tp->rcv_by_unackwin = tlen + off;
2065 		tp->t_lropktlen += tlen;
2072 		+ This isn't a pure ack (tlen > 0)
2078 		((tp->ecn_flags & (TE_ECN_ON)) == (TE_ECN_ON)) && tlen > 0 &&
2166 		int seg_size = tlen;
2254 		if (tlen == 0) {
2364 		    tlen <= tcp_sbspace(tp)) {
2391 				tcp_start_coalescing(ip, th, tlen);
2399 			tp->rcv_nxt += tlen;
2411 			tcpstat.tcps_rcvbyte += tlen;
2419 				locked_add_64(&inp->inp_stat->rxbytes, tlen);
2423 			tcp_sbrcv_grow(tp, &so->so_rcv, &to, tlen);
2686 			if (DELAY_ACK(tp, th) && tlen != 0 ) {
2742 		if (tlen > tp->rcv_wnd) {
2743 			todrop = tlen - tp->rcv_wnd;
2745 			tlen = tp->rcv_wnd;
2926 			tcpstat.tcps_rcvdupbyte += tlen;
2929 				nstat_route_rx(tp->t_inpcb->inp_route.ro_rt, 1, tlen, NSTAT_RX_FLAG_DUPLICATE);
2931 				locked_add_64(&inp->inp_stat->rxbytes, tlen);
2932 				tp->t_stat.rxduplicatebytes += tlen;
2934 			if (tlen)
2970 		if (todrop > tlen
2971 		    || (todrop == tlen && (thflags & TH_FIN) == 0)) {
2989 			todrop = tlen;
3004 		tlen -= todrop;
3018 	    tp->t_state > TCPS_CLOSE_WAIT && tlen) {
3033 	todrop = (th->th_seq+tlen) - (tp->rcv_nxt+tp->rcv_wnd);
3036 		if (todrop >= tlen) {
3037 			tcpstat.tcps_rcvbyteafterwin += tlen;
3067 		tlen -= todrop;
3091 	    SEQ_LEQ(tp->last_ack_sent, th->th_seq + tlen +
3173 		if (tlen == 0 && (thflags & TH_FIN) == 0)
3174 			(void) tcp_reass(tp, (struct tcphdr *)0, &tlen,
3205 			if (tlen == 0 && tiwin == tp->snd_wnd) {
3607 		if (tlen == 0 &&
3665 		if (th->th_urp <= (u_int32_t)tlen
3709 	if ((tlen || (thflags & TH_FIN)) &&
3712 		tcp_seq save_end = th->th_seq + tlen;
3740 			tp->rcv_nxt += tlen;
3743 			tcpstat.tcps_rcvbyte += tlen;
3750 				locked_add_64(&inp->inp_stat->rxbytes, tlen);
3754 			tcp_sbrcv_grow(tp, &so->so_rcv, &to, tlen);
3759 			thflags = tcp_reass(tp, th, &tlen, m);
3763 		if (tlen > 0 && tp->sack_enable)
3972 			tlen++;
3974 		tcp_respond(tp, mtod(m, void *), th, m, th->th_seq+tlen,