38 #define TCP_HDR_LEN(tcph) (tcph->doff << 2)  argument
40 #define TCP_PAYLOAD_LENGTH(iph, tcph) \  argument
41 	(ntohs(iph->tot_len) - IP_HDR_LEN(iph) - TCP_HDR_LEN(tcph))
55 static int lro_tcp_ip_check(const struct iphdr *iph, const struct tcphdr *tcph,  in lro_tcp_ip_check()  argument
62 	if (TCP_PAYLOAD_LENGTH(iph, tcph) == 0)  in lro_tcp_ip_check()
68 	if (tcph->cwr || tcph->ece || tcph->urg || !tcph->ack ||  in lro_tcp_ip_check()
69 	    tcph->rst || tcph->syn || tcph->fin)  in lro_tcp_ip_check()
75 	if (tcph->doff != TCPH_LEN_WO_OPTIONS &&  in lro_tcp_ip_check()
76 	    tcph->doff != TCPH_LEN_W_TIMESTAMP)  in lro_tcp_ip_check()
80 	if (tcph->doff == TCPH_LEN_W_TIMESTAMP) {  in lro_tcp_ip_check()
81 		__be32 *topt = (__be32 *)(tcph + 1);  in lro_tcp_ip_check()
106 	struct tcphdr *tcph = lro_desc->tcph;  in lro_update_tcp_ip_header()  local
110 	tcph->ack_seq = lro_desc->tcp_ack;  in lro_update_tcp_ip_header()
111 	tcph->window = lro_desc->tcp_window;  in lro_update_tcp_ip_header()
114 		p = (__be32 *)(tcph + 1);  in lro_update_tcp_ip_header()
121 	tcph->check = 0;  in lro_update_tcp_ip_header()
122 	tcp_hdr_csum = csum_partial(tcph, TCP_HDR_LEN(tcph), 0);  in lro_update_tcp_ip_header()
124 	tcph->check = csum_tcpudp_magic(iph->saddr, iph->daddr,  in lro_update_tcp_ip_header()
130 static __wsum lro_tcp_data_csum(struct iphdr *iph, struct tcphdr *tcph, int len)  in lro_tcp_data_csum()  argument
136 	tcp_csum = ~csum_unfold(tcph->check);  in lro_tcp_data_csum()
137 	tcp_hdr_csum = csum_partial(tcph, TCP_HDR_LEN(tcph), tcp_csum);  in lro_tcp_data_csum()
140 					     len + TCP_HDR_LEN(tcph),  in lro_tcp_data_csum()
148 			  struct iphdr *iph, struct tcphdr *tcph)  in lro_init_desc()  argument
152 	u32 tcp_data_len = TCP_PAYLOAD_LENGTH(iph, tcph);  in lro_init_desc()
158 	lro_desc->tcph = tcph;  in lro_init_desc()
159 	lro_desc->tcp_next_seq = ntohl(tcph->seq) + tcp_data_len;  in lro_init_desc()
160 	lro_desc->tcp_ack = tcph->ack_seq;  in lro_init_desc()
161 	lro_desc->tcp_window = tcph->window;  in lro_init_desc()
166 	if (tcph->doff == 8) {  in lro_init_desc()
167 		ptr = (__be32 *)(tcph+1);  in lro_init_desc()
176 	lro_desc->data_csum = lro_tcp_data_csum(iph, tcph,  in lro_init_desc()
186 			   struct tcphdr *tcph, int tcp_data_len)  in lro_add_common()  argument
194 	lro_desc->tcp_window = tcph->window;  in lro_add_common()
195 	lro_desc->tcp_ack = tcph->ack_seq;  in lro_add_common()
199 		topt = (__be32 *) (tcph + 1);  in lro_add_common()
204 					     lro_tcp_data_csum(iph, tcph,  in lro_add_common()
215 			   struct iphdr *iph, struct tcphdr *tcph)  in lro_add_packet()  argument
218 	int tcp_data_len = TCP_PAYLOAD_LENGTH(iph, tcph);  in lro_add_packet()
220 	lro_add_common(lro_desc, iph, tcph, tcp_data_len);  in lro_add_packet()
236 			      struct tcphdr *tcph)  in lro_check_tcp_conn()  argument
240 	    (lro_desc->tcph->source != tcph->source) ||  in lro_check_tcp_conn()
241 	    (lro_desc->tcph->dest != tcph->dest))  in lro_check_tcp_conn()
249 					 struct tcphdr *tcph)  in lro_get_desc()  argument
259 			if (!lro_check_tcp_conn(tmp, iph, tcph)) {  in lro_get_desc()
299 	struct tcphdr *tcph;  in __lro_proc_skb()  local
304 	    lro_mgr->get_skb_header(skb, (void *)&iph, (void *)&tcph,  in __lro_proc_skb()
311 	lro_desc = lro_get_desc(lro_mgr, lro_mgr->lro_arr, iph, tcph);  in __lro_proc_skb()
320 		if (lro_tcp_ip_check(iph, tcph, skb->len - vlan_hdr_len, NULL))  in __lro_proc_skb()
324 		lro_init_desc(lro_desc, skb, iph, tcph);  in __lro_proc_skb()
329 	if (lro_desc->tcp_next_seq != ntohl(tcph->seq))  in __lro_proc_skb()
332 	if (lro_tcp_ip_check(iph, tcph, skb->len, lro_desc))  in __lro_proc_skb()
335 	lro_add_packet(lro_desc, skb, iph, tcph);  in __lro_proc_skb()