sys/netinet/tcp_lro.c

113 tcp_lro_csum_th(struct tcphdr *th)
118 	ch = th->th_sum = 0x0000;
119 	l = th->th_off;
120 	p = (uint16_t *)th;
135 tcp_lro_rx_csum_fixup(struct lro_entry *le, void *l3hdr, struct tcphdr *th,
187 	cs = ~tcp_lro_csum_th(th);
201 		struct tcphdr *th;
213 			th = (struct tcphdr *)(ip6 + 1);
244 			th = (struct tcphdr *)(ip4 + 1);
252 			th = NULL;	/* Keep compiler happy. */
258 		th->th_ack = le->ack_seq;
259 		th->th_win = le->window;
264 			ts_ptr = (uint32_t *)(th + 1);
271 		le->ulp_csum += tcp_lro_csum_th(th);
275 		th->th_sum = (le->ulp_csum & 0xffff);
276 		th->th_sum = ~th->th_sum;
278 		th->th_sum = TCP_LRO_INVALID_CSUM;
292     struct tcphdr **th)
302 	*th = (struct tcphdr *)(ip6 + 1);
311     struct tcphdr **th)
343 	*th = (struct tcphdr *)(ip4 + 1);
360 	struct tcphdr *th;
383 		error = tcp_lro_rx_ipv6(lc, m, ip6, &th);
402 		error = tcp_lro_rx_ipv4(lc, m, ip4, &th);
432 	if ((th->th_flags & ~(TH_ACK | TH_PUSH)) != 0)
443 	l = (th->th_off << 2);
445 	l -= sizeof(*th);
446 	ts_ptr = (uint32_t *)(th + 1);
454 		csum = th->th_sum;
456 	seq = ntohl(th->th_seq);
462 		if (le->source_port != th->th_sport ||
463 		    le->dest_port != th->th_dport)
493 		    (tcp_data_len == 0 && le->ack_seq == th->th_ack))) {
512 		le->ack_seq = th->th_ack;
513 		le->window = th->th_win;
517 		le->ulp_csum += tcp_lro_rx_csum_fixup(le, l3hdr, th,
581 	le->source_port = th->th_sport;
582 	le->dest_port = th->th_dport;
585 	le->ack_seq = th->th_ack;
586 	le->window = th->th_win;
604 	le->ulp_csum = tcp_lro_rx_csum_fixup(le, l3hdr, th, tcp_data_len,
606 	th->th_sum = csum;	/* Restore checksum on first packet. */