115 static int handle_tcp_options(struct nes_cm_node *cm_node, struct tcphdr *tcph, struct sk_buff *skb…
439 	struct tcphdr *tcph;  in form_cm_frame()  local
445 	packetsize += sizeof(*tcph);  in form_cm_frame()
449 	memset(skb->data, 0x00, ETH_HLEN + sizeof(*iph) + sizeof(*tcph));  in form_cm_frame()
458 	tcph = (struct tcphdr *)buf;  in form_cm_frame()
462 	buf += sizeof(*tcph);  in form_cm_frame()
488 	tcph->source = htons(cm_node->mapped_loc_port);  in form_cm_frame()
489 	tcph->dest = htons(cm_node->mapped_rem_port);  in form_cm_frame()
490 	tcph->seq = htonl(cm_node->tcp_cntxt.loc_seq_num);  in form_cm_frame()
494 		tcph->ack_seq = htonl(cm_node->tcp_cntxt.loc_ack_num);  in form_cm_frame()
495 		tcph->ack = 1;  in form_cm_frame()
497 		tcph->ack_seq = 0;  in form_cm_frame()
502 		tcph->syn = 1;  in form_cm_frame()
509 		tcph->fin = 1;  in form_cm_frame()
513 		tcph->rst = 1;  in form_cm_frame()
515 	tcph->doff = (u16)((sizeof(*tcph) + optionsize + 3) >> 2);  in form_cm_frame()
516 	tcph->window = htons(cm_node->tcp_cntxt.rcv_wnd);  in form_cm_frame()
517 	tcph->urg_ptr = 0;  in form_cm_frame()
1857 	struct tcphdr *tcph)  in handle_rst_pkt()  argument
1994 static int check_syn(struct nes_cm_node *cm_node, struct tcphdr *tcph,  in check_syn()  argument
1999 	err = ((ntohl(tcph->ack_seq) == cm_node->tcp_cntxt.loc_seq_num)) ? 0 : 1;  in check_syn()
2006 static int check_seq(struct nes_cm_node *cm_node, struct tcphdr *tcph,  in check_seq()  argument
2016 	seq = ntohl(tcph->seq);  in check_seq()
2017 	ack_seq = ntohl(tcph->ack_seq);  in check_seq()
2041 			   struct tcphdr *tcph)  in handle_syn_pkt()  argument
2047 	optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);  in handle_syn_pkt()
2049 	inc_sequence = ntohl(tcph->seq);  in handle_syn_pkt()
2067 		ret = handle_tcp_options(cm_node, tcph, skb, optionsize,  in handle_syn_pkt()
2102 			      struct tcphdr *tcph)  in handle_synack_pkt()  argument
2108 	optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);  in handle_synack_pkt()
2110 	inc_sequence = ntohl(tcph->seq);  in handle_synack_pkt()
2115 		if (check_syn(cm_node, tcph, skb))  in handle_synack_pkt()
2117 		cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);  in handle_synack_pkt()
2119 		ret = handle_tcp_options(cm_node, tcph, skb, optionsize, 0);  in handle_synack_pkt()
2135 		cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq);  in handle_synack_pkt()
2141 		cm_node->tcp_cntxt.loc_seq_num = ntohl(tcph->ack_seq);  in handle_synack_pkt()
2161 			  struct tcphdr *tcph)  in handle_ack_pkt()  argument
2168 	optionsize = (tcph->doff << 2) - sizeof(struct tcphdr);  in handle_ack_pkt()
2170 	if (check_seq(cm_node, tcph, skb))  in handle_ack_pkt()
2173 	skb_pull(skb, tcph->doff << 2);  in handle_ack_pkt()
2174 	inc_sequence = ntohl(tcph->seq);  in handle_ack_pkt()
2180 		ret = handle_tcp_options(cm_node, tcph, skb, optionsize, 1);  in handle_ack_pkt()
2183 		cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);  in handle_ack_pkt()
2204 		cm_node->tcp_cntxt.rem_ack_num = ntohl(tcph->ack_seq);  in handle_ack_pkt()
2250 static int handle_tcp_options(struct nes_cm_node *cm_node, struct tcphdr *tcph,  in handle_tcp_options()  argument
2253 	u8 *optionsloc = (u8 *)&tcph[1];  in handle_tcp_options()
2257 				    (u32)tcph->syn)) {  in handle_tcp_options()
2268 	cm_node->tcp_cntxt.snd_wnd = ntohs(tcph->window) <<  in handle_tcp_options()
2350 	struct tcphdr *tcph = tcp_hdr(skb);  in process_packet()  local
2357 		  "ack=%d rst=%d fin=%d\n", cm_node, cm_node->state, tcph->syn,  in process_packet()
2358 		  tcph->ack, tcph->rst, tcph->fin);  in process_packet()
2360 	if (tcph->rst) {  in process_packet()
2362 	} else if (tcph->syn) {  in process_packet()
2364 		if (tcph->ack)  in process_packet()
2366 	} else if (tcph->ack) {  in process_packet()
2369 	if (tcph->fin)  in process_packet()
2374 		handle_syn_pkt(cm_node, skb, tcph);  in process_packet()
2377 		handle_synack_pkt(cm_node, skb, tcph);  in process_packet()
2380 		ret = handle_ack_pkt(cm_node, skb, tcph);  in process_packet()
2385 		handle_rst_pkt(cm_node, skb, tcph);  in process_packet()
2388 		if ((fin_set) && (!check_seq(cm_node, tcph, skb)))  in process_packet()
2732 	struct tcphdr *tcph;  in mini_cm_recv_pkt()  local
2743 	tcph = (struct tcphdr *)(skb->data + sizeof(struct iphdr));  in mini_cm_recv_pkt()
2746 	nfo.loc_port = ntohs(tcph->dest);  in mini_cm_recv_pkt()
2748 	nfo.rem_port = ntohs(tcph->source);  in mini_cm_recv_pkt()
2752 	nfo.mapped_loc_port = ntohs(tcph->dest);  in mini_cm_recv_pkt()
2754 	nfo.mapped_rem_port = ntohs(tcph->source);  in mini_cm_recv_pkt()
2760 		  &tmp_daddr, tcph->dest, &tmp_saddr, tcph->source);  in mini_cm_recv_pkt()
2770 			if ((!tcph->syn) || (tcph->ack)) {  in mini_cm_recv_pkt()
2796 			if (!tcph->rst && !tcph->fin) {  in mini_cm_recv_pkt()
2816 		skb_set_transport_header(skb, sizeof(*tcph));  in mini_cm_recv_pkt()