mirror of
https://github.com/espressif/esp-idf.git
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129 lines
3.8 KiB
C
129 lines
3.8 KiB
C
/*
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* SPDX-FileCopyrightText: 2020-2022 Espressif Systems (Shanghai) CO LTD
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#include "lwip_default_hooks.h"
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#include "lwip/prot/dhcp.h"
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#include "lwip/dhcp.h"
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#define __weak __attribute__((weak))
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#ifdef CONFIG_LWIP_HOOK_IP6_ROUTE_DEFAULT
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struct netif *__weak
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lwip_hook_ip6_route(const ip6_addr_t *src, const ip6_addr_t *dest)
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{
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LWIP_UNUSED_ARG(src);
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LWIP_UNUSED_ARG(dest);
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return NULL;
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}
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#endif
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#ifdef CONFIG_LWIP_HOOK_NETCONN_EXT_RESOLVE_DEFAULT
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int __weak lwip_hook_netconn_external_resolve(const char *name, ip_addr_t *addr, u8_t addrtype, err_t *err)
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{
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LWIP_UNUSED_ARG(name);
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LWIP_UNUSED_ARG(addr);
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LWIP_UNUSED_ARG(addrtype);
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LWIP_UNUSED_ARG(err);
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return 0;
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}
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#endif
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#ifdef CONFIG_LWIP_HOOK_ND6_GET_GW_DEFAULT
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const ip6_addr_t *__weak lwip_hook_nd6_get_gw(struct netif *netif, const ip6_addr_t *dest)
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{
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LWIP_UNUSED_ARG(netif);
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LWIP_UNUSED_ARG(dest);
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return 0;
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}
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#endif
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#ifdef CONFIG_LWIP_HOOK_IP6_INPUT_DEFAULT
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int __weak lwip_hook_ip6_input(struct pbuf *p, struct netif *inp)
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{
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LWIP_UNUSED_ARG(p);
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LWIP_UNUSED_ARG(inp);
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return 0;
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}
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#endif
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#ifdef LWIP_HOOK_IP4_ROUTE_SRC
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#if ESP_IP4_ROUTE
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#include "lwip/netif.h"
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bool ip4_netif_exist(const ip4_addr_t *src, const ip4_addr_t *dest)
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{
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struct netif *netif = NULL;
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for (netif = netif_list; netif != NULL; netif = netif->next) {
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/* is the netif up, does it have a link and a valid address? */
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if (netif_is_up(netif) && netif_is_link_up(netif) && !ip4_addr_isany_val(*netif_ip4_addr(netif))) {
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/* source netif and dest netif match? */
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if (ip4_addr_netcmp(src, netif_ip4_addr(netif), netif_ip4_netmask(netif)) || ip4_addr_netcmp(dest, netif_ip4_addr(netif), netif_ip4_netmask(netif))) {
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/* return false when both netif don't match */
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return true;
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}
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}
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}
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return false;
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}
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/**
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* Source based IPv4 routing hook function.
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*/
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struct netif *
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ip4_route_src_hook(const ip4_addr_t *src,const ip4_addr_t *dest)
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{
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struct netif *netif = NULL;
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/* destination IP is broadcast IP? */
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if ((src != NULL) && !ip4_addr_isany(src)) {
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/* iterate through netifs */
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for (netif = netif_list; netif != NULL; netif = netif->next) {
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/* is the netif up, does it have a link and a valid address? */
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if (netif_is_up(netif) && netif_is_link_up(netif) && !ip4_addr_isany_val(*netif_ip4_addr(netif))) {
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/* source IP matches? */
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if (ip4_addr_cmp(src, netif_ip4_addr(netif))) {
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/* return netif on which to forward IP packet */
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return netif;
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}
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}
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}
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}
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return netif;
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}
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#endif
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#endif /* LWIP_HOOK_IP4_ROUTE_SRC */
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void dhcp_parse_extra_opts(struct dhcp *dhcp, uint8_t state, uint8_t option, uint8_t len, struct pbuf* p, uint16_t offset)
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{
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if ((option == DHCP_OPTION_MTU) &&
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(state == DHCP_STATE_REBOOTING || state == DHCP_STATE_REBINDING ||
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state == DHCP_STATE_RENEWING || state == DHCP_STATE_REQUESTING)) {
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u32_t mtu = 0;
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struct netif *netif;
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LWIP_ERROR("dhcp_parse_extra_opts(): MTU option's len != 2", len == 2, return;);
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LWIP_ERROR("dhcp_parse_extra_opts(): extracting MTU option failed",
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pbuf_copy_partial(p, &mtu, 2, offset) == 2, return;);
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mtu = lwip_htons((u16_t)mtu);
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NETIF_FOREACH(netif) {
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/* find the netif related to this dhcp */
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if (dhcp == netif_dhcp_data(netif)) {
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if (mtu < netif->mtu) {
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netif->mtu = mtu;
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LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE, ("dhcp_parse_extra_opts(): Negotiated netif MTU is %d\n", netif->mtu));
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}
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return;
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}
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}
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} /* DHCP_OPTION_MTU */
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}
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