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lwip: Add IPv4 route hook to the esp32 port

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This commit is contained in:
David Cermak 2022-03-17 12:43:57 +01:00
parent 808ac7427a
commit 06263efe0b
2 changed files with 53 additions and 0 deletions
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50
components/lwip/port/esp32/hooks/lwip_default_hooks.c
View File

@ -50,3 +50,53 @@ int __weak lwip_hook_ip6_input(struct pbuf *p, struct netif *inp)
return 0;
}
#endif
#ifdef LWIP_HOOK_IP4_ROUTE_SRC
#if ESP_IP4_ROUTE
#include "lwip/netif.h"
bool ip4_netif_exist(const ip4_addr_t *src, const ip4_addr_t *dest)
{
struct netif *netif = NULL;
for (netif = netif_list; netif != NULL; netif = netif->next) {
/* is the netif up, does it have a link and a valid address? */
if (netif_is_up(netif) && netif_is_link_up(netif) && !ip4_addr_isany_val(*netif_ip4_addr(netif))) {
/* source netif and dest netif match? */
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))) {
/* return false when both netif don't match */
return true;
}
}
}
return false;
}
/**
* Source based IPv4 routing hook function.
*/
struct netif *
ip4_route_src_hook(const ip4_addr_t *src,const ip4_addr_t *dest)
{
struct netif *netif = NULL;
/* destination IP is broadcast IP? */
if ((src != NULL) && !ip4_addr_isany(src)) {
/* iterate through netifs */
for (netif = netif_list; netif != NULL; netif = netif->next) {
/* is the netif up, does it have a link and a valid address? */
if (netif_is_up(netif) && netif_is_link_up(netif) && !ip4_addr_isany_val(*netif_ip4_addr(netif))) {
/* source IP matches? */
if (ip4_addr_cmp(src, netif_ip4_addr(netif))) {
/* return netif on which to forward IP packet */
return netif;
}
}
}
}
return netif;
}
#endif
#endif /* LWIP_HOOK_IP4_ROUTE_SRC */

3
components/lwip/port/esp32/include/lwip_default_hooks.h
View File

@ -53,6 +53,9 @@ int lwip_hook_ip6_input(struct pbuf *p, struct netif *inp);
#define LWIP_HOOK_IP6_INPUT lwip_hook_ip6_input
#endif /* CONFIG_LWIP_HOOK_IP6_INPUT_CUSTIOM... */
struct netif *
ip4_route_src_hook(const ip4_addr_t *src,const ip4_addr_t *dest);
#ifdef __cplusplus
}
#endif