ac74d8b652
Replace the existing Apache 2.0 boilerplate header with an SPDX tag throughout the zephyr code tree. This patch was generated via a script run over the master branch. Also updated doc/porting/application.rst that had a dependency on line numbers in a literal include. Manually updated subsys/logging/sys_log.c that had a malformed header in the original file. Also cleanup several cases that already had a SPDX tag and we either got a duplicate or missed updating. Jira: ZEP-1457 Change-Id: I6131a1d4ee0e58f5b938300c2d2fc77d2e69572c Signed-off-by: David B. Kinder <david.b.kinder@intel.com> Signed-off-by: Kumar Gala <kumar.gala@linaro.org>
134 lines
3.1 KiB
C
134 lines
3.1 KiB
C
/** @file
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* @brief IPv4 related functions
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*/
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/*
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* Copyright (c) 2016 Intel Corporation
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#if defined(CONFIG_NET_DEBUG_IPV4)
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#define SYS_LOG_DOMAIN "net/ipv4"
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#define NET_LOG_ENABLED 1
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#endif
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#include <errno.h>
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#include <net/net_core.h>
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#include <net/nbuf.h>
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#include <net/net_stats.h>
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#include <net/net_context.h>
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#include "net_private.h"
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#include "ipv4.h"
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struct net_buf *net_ipv4_create_raw(struct net_buf *buf,
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uint16_t reserve,
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const struct in_addr *src,
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const struct in_addr *dst,
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struct net_if *iface,
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uint8_t next_header)
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{
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struct net_buf *header;
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header = net_nbuf_get_reserve_data(reserve);
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net_buf_frag_insert(buf, header);
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NET_IPV4_BUF(buf)->vhl = 0x45;
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NET_IPV4_BUF(buf)->tos = 0x00;
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NET_IPV4_BUF(buf)->proto = 0;
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NET_IPV4_BUF(buf)->ttl = net_if_ipv4_get_ttl(iface);
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NET_IPV4_BUF(buf)->offset[0] = NET_IPV4_BUF(buf)->offset[1] = 0;
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NET_IPV4_BUF(buf)->id[0] = NET_IPV4_BUF(buf)->id[1] = 0;
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net_ipaddr_copy(&NET_IPV4_BUF(buf)->dst, dst);
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net_ipaddr_copy(&NET_IPV4_BUF(buf)->src, src);
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NET_IPV4_BUF(buf)->proto = next_header;
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net_nbuf_set_ip_hdr_len(buf, sizeof(struct net_ipv4_hdr));
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net_nbuf_set_family(buf, AF_INET);
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net_buf_add(header, sizeof(struct net_ipv4_hdr));
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return buf;
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}
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struct net_buf *net_ipv4_create(struct net_context *context,
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struct net_buf *buf,
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const struct in_addr *src,
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const struct in_addr *dst)
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{
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NET_ASSERT(((struct sockaddr_in_ptr *)&context->local)->sin_addr);
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if (!src) {
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src = ((struct sockaddr_in_ptr *)&context->local)->sin_addr;
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}
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if (net_is_ipv4_addr_unspecified(src)
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|| net_is_ipv4_addr_mcast(src)) {
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src = &net_nbuf_iface(buf)->ipv4.unicast[0].address.in_addr;
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}
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return net_ipv4_create_raw(buf,
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net_nbuf_ll_reserve(buf),
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src,
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dst,
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net_context_get_iface(context),
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net_context_get_ip_proto(context));
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}
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struct net_buf *net_ipv4_finalize_raw(struct net_buf *buf,
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uint8_t next_header)
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{
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/* Set the length of the IPv4 header */
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size_t total_len;
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net_nbuf_compact(buf);
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total_len = net_buf_frags_len(buf->frags);
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NET_IPV4_BUF(buf)->len[0] = total_len / 256;
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NET_IPV4_BUF(buf)->len[1] = total_len - NET_IPV4_BUF(buf)->len[0] * 256;
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NET_IPV4_BUF(buf)->chksum = 0;
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NET_IPV4_BUF(buf)->chksum = ~net_calc_chksum_ipv4(buf);
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#if defined(CONFIG_NET_UDP)
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if (next_header == IPPROTO_UDP) {
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NET_UDP_BUF(buf)->chksum = 0;
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NET_UDP_BUF(buf)->chksum = ~net_calc_chksum_udp(buf);
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}
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#endif
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#if defined(CONFIG_NET_TCP)
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if (next_header == IPPROTO_TCP) {
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NET_TCP_BUF(buf)->chksum = 0;
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NET_TCP_BUF(buf)->chksum = ~net_calc_chksum_tcp(buf);
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}
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#endif
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return buf;
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}
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struct net_buf *net_ipv4_finalize(struct net_context *context,
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struct net_buf *buf)
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{
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return net_ipv4_finalize_raw(buf,
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net_context_get_ip_proto(context));
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}
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const struct in_addr *net_ipv4_unspecified_address(void)
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{
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static const struct in_addr addr;
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return &addr;
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}
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const struct in_addr *net_ipv4_broadcast_address(void)
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{
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static const struct in_addr addr = { { { 255, 255, 255, 255 } } };
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return &addr;
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}
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