35 int net_ipv4_create_full(struct net_pkt *pkt,  in net_ipv4_create_full()  argument
46 	ipv4_hdr = (struct net_ipv4_hdr *)net_pkt_get_data(pkt, &ipv4_access);  in net_ipv4_create_full()
59 	ipv4_hdr->ttl = net_pkt_ipv4_ttl(pkt);  in net_ipv4_create_full()
62 			if (net_pkt_context(pkt) != NULL) {  in net_ipv4_create_full()
64 					net_context_get_ipv4_mcast_ttl(net_pkt_context(pkt));  in net_ipv4_create_full()
66 				ipv4_hdr->ttl = net_if_ipv4_get_mcast_ttl(net_pkt_iface(pkt));  in net_ipv4_create_full()
69 			if (net_pkt_context(pkt) != NULL) {  in net_ipv4_create_full()
71 					net_context_get_ipv4_ttl(net_pkt_context(pkt));  in net_ipv4_create_full()
73 				ipv4_hdr->ttl = net_if_ipv4_get_ttl(net_pkt_iface(pkt));  in net_ipv4_create_full()
84 	net_pkt_set_ip_hdr_len(pkt, sizeof(struct net_ipv4_hdr));  in net_ipv4_create_full()
86 	return net_pkt_set_data(pkt, &ipv4_access);  in net_ipv4_create_full()
89 int net_ipv4_create(struct net_pkt *pkt,  in net_ipv4_create()  argument
97 		net_ipv4_set_dscp(&tos, net_pkt_ip_dscp(pkt));  in net_ipv4_create()
98 		net_ipv4_set_ecn(&tos, net_pkt_ip_ecn(pkt));  in net_ipv4_create()
101 	if (IS_ENABLED(CONFIG_NET_IPV4_PMTU) && net_pkt_ipv4_pmtu(pkt)) {  in net_ipv4_create()
105 	return net_ipv4_create_full(pkt, src, dst, tos, 0U, flags, 0U);  in net_ipv4_create()
108 int net_ipv4_finalize(struct net_pkt *pkt, uint8_t next_header_proto)  in net_ipv4_finalize()  argument
113 	net_pkt_set_overwrite(pkt, true);  in net_ipv4_finalize()
115 	ipv4_hdr = (struct net_ipv4_hdr *)net_pkt_get_data(pkt, &ipv4_access);  in net_ipv4_finalize()
121 		if (net_pkt_ipv4_opts_len(pkt)) {  in net_ipv4_finalize()
123 					((net_pkt_ip_hdr_len(pkt) +  in net_ipv4_finalize()
124 					  net_pkt_ipv4_opts_len(pkt)) / 4U));  in net_ipv4_finalize()
128 	ipv4_hdr->len   = htons(net_pkt_get_len(pkt));  in net_ipv4_finalize()
131 	if (net_if_need_calc_tx_checksum(net_pkt_iface(pkt), NET_IF_CHECKSUM_IPV4_HEADER)) {  in net_ipv4_finalize()
132 		ipv4_hdr->chksum = net_calc_chksum_ipv4(pkt);  in net_ipv4_finalize()
135 	net_pkt_set_data(pkt, &ipv4_access);  in net_ipv4_finalize()
139 		return net_udp_finalize(pkt, false);  in net_ipv4_finalize()
142 		return net_tcp_finalize(pkt, false);  in net_ipv4_finalize()
144 		return net_icmpv4_finalize(pkt, false);  in net_ipv4_finalize()
151 int net_ipv4_parse_hdr_options(struct net_pkt *pkt,  in net_ipv4_parse_hdr_options()  argument
163 	net_pkt_cursor_backup(pkt, &cur);  in net_ipv4_parse_hdr_options()
164 	net_pkt_cursor_init(pkt);  in net_ipv4_parse_hdr_options()
166 	if (net_pkt_skip(pkt, sizeof(struct net_ipv4_hdr))) {  in net_ipv4_parse_hdr_options()
170 	total_opts_len = net_pkt_ipv4_opts_len(pkt);  in net_ipv4_parse_hdr_options()
176 		if (net_pkt_read_u8(pkt, &opt_type)) {  in net_ipv4_parse_hdr_options()
184 			if (net_pkt_read_u8(pkt, &opt_len)) {  in net_ipv4_parse_hdr_options()
215 			if (net_pkt_read(pkt, opt_data, opt_len)) {  in net_ipv4_parse_hdr_options()
225 			if (net_pkt_skip(pkt, opt_len)) {  in net_ipv4_parse_hdr_options()
235 	net_pkt_cursor_restore(pkt, &cur);  in net_ipv4_parse_hdr_options()
241 enum net_verdict net_ipv4_input(struct net_pkt *pkt, bool is_loopback)  in net_ipv4_input()  argument
246 	int real_len = net_pkt_get_len(pkt);  in net_ipv4_input()
258 	net_pkt_cursor_backup(pkt, &hdr_start);  in net_ipv4_input()
261 	net_stats_update_ipv4_recv(net_pkt_iface(pkt));  in net_ipv4_input()
263 	hdr = (struct net_ipv4_hdr *)net_pkt_get_data(pkt, &ipv4_access);  in net_ipv4_input()
275 	net_pkt_set_ip_hdr_len(pkt, sizeof(struct net_ipv4_hdr));  in net_ipv4_input()
278 		net_pkt_set_ip_dscp(pkt, net_ipv4_get_dscp(hdr->tos));  in net_ipv4_input()
279 		net_pkt_set_ip_ecn(pkt, net_ipv4_get_ecn(hdr->tos));  in net_ipv4_input()
291 	net_pkt_set_ipv4_opts_len(pkt, opts_len);  in net_ipv4_input()
299 		net_pkt_update_length(pkt, pkt_len);  in net_ipv4_input()
320 	if (net_ipv4_is_addr_bcast(net_pkt_iface(pkt), (struct in_addr *)hdr->src)) {  in net_ipv4_input()
326 	    !net_ipv4_is_addr_bcast(net_pkt_iface(pkt), (struct in_addr *)hdr->dst) &&  in net_ipv4_input()
332 	if (net_if_need_calc_rx_checksum(net_pkt_iface(pkt), NET_IF_CHECKSUM_IPV4_HEADER) &&  in net_ipv4_input()
333 	    net_calc_chksum_ipv4(pkt) != 0U) {  in net_ipv4_input()
338 	net_pkt_set_ipv4_ttl(pkt, hdr->ttl);  in net_ipv4_input()
340 	net_pkt_set_family(pkt, PF_INET);  in net_ipv4_input()
342 	if (!net_pkt_filter_ip_recv_ok(pkt)) {  in net_ipv4_input()
355 		net_dhcpv4_accept_unicast(pkt)))) ||  in net_ipv4_input()
357 	     net_ipv4_is_addr_bcast(net_pkt_iface(pkt), (struct in_addr *)hdr->dst))) {  in net_ipv4_input()
362 	net_pkt_acknowledge_data(pkt, &ipv4_access);  in net_ipv4_input()
366 		if (net_pkt_skip(pkt, opts_len)) {  in net_ipv4_input()
376 			return net_ipv4_handle_fragment_hdr(pkt, hdr);  in net_ipv4_input()
386 		verdict = net_icmpv4_input(pkt, hdr);  in net_ipv4_input()
393 		verdict = net_ipv4_igmp_input(pkt, hdr);  in net_ipv4_input()
400 		proto_hdr.tcp = net_tcp_input(pkt, &tcp_access);  in net_ipv4_input()
406 		proto_hdr.udp = net_udp_input(pkt, &udp_access);  in net_ipv4_input()
421 		net_pkt_set_remote_address(pkt, (struct sockaddr *)&remote_addr,  in net_ipv4_input()
425 		net_pkt_cursor_restore(pkt, &hdr_start);  in net_ipv4_input()
426 		net_pkt_pull(pkt, net_pkt_ip_hdr_len(pkt) +  in net_ipv4_input()
427 			     net_pkt_ipv4_opts_len(pkt));  in net_ipv4_input()
429 		tunnel_iface = net_ipip_get_virtual_interface(net_pkt_iface(pkt));  in net_ipv4_input()
431 			return net_if_l2(tunnel_iface)->recv(net_pkt_iface(pkt), pkt);  in net_ipv4_input()
443 	verdict = net_conn_input(pkt, &ip, hdr->proto, &proto_hdr);  in net_ipv4_input()
449 	net_stats_update_ipv4_drop(net_pkt_iface(pkt));  in net_ipv4_input()
453 enum net_verdict net_ipv4_prepare_for_send(struct net_pkt *pkt)  in net_ipv4_prepare_for_send()  argument
463 				       NET_IPV4_HDR(pkt)->dst);  in net_ipv4_prepare_for_send()
467 						  net_if_get_mtu(net_pkt_iface(pkt)));  in net_ipv4_prepare_for_send()
477 	return net_ipv4_prepare_for_send_fragment(pkt);  in net_ipv4_prepare_for_send()