/**
* Connect an RAW PCB. This function is required by upper layers
* of lwip. Using the raw api you could use raw_sendto() instead
*
* This will associate the RAW PCB with the remote address.
*
* @param pcb RAW PCB to be connected with remote address ipaddr and port.
* @param ipaddr remote IP address to connect with.
*
* @return lwIP error code
*
* @see raw_disconnect() and raw_sendto()
*/
err_t
raw_connect(struct raw_pcb *pcb, const ip_addr_t *ipaddr)
{
if ((pcb == NULL) || (ipaddr == NULL) || !IP_ADDR_PCB_VERSION_MATCH_EXACT(pcb, ipaddr)) {
return ERR_VAL;
}
ip_addr_set_ipaddr(&pcb->remote_ip, ipaddr);
return ERR_OK;
}
/** Common code to see if the current input packet matches the pcb
* (current input packet is accessed via ip(4/6)_current_* macros)
*
* @param pcb pcb to check
* @param inp network interface on which the datagram was received (only used for IPv4)
* @param broadcast 1 if his is an IPv4 broadcast (global or subnet-only), 0 otherwise (only used for IPv4)
* @return 1 on match, 0 otherwise
*/
static u8_t ESP_IRAM_ATTR
udp_input_local_match(struct udp_pcb *pcb, struct netif *inp, u8_t broadcast)
{
LWIP_UNUSED_ARG(inp); /* in IPv6 only case */
LWIP_UNUSED_ARG(broadcast); /* in IPv6 only case */
/* Dual-stack: PCBs listening to any IP type also listen to any IP address */
if(IP_IS_ANY_TYPE_VAL(pcb->local_ip)) {
#if LWIP_IPV4 && IP_SOF_BROADCAST_RECV
if((broadcast != 0) && !ip_get_option(pcb, SOF_BROADCAST)) {
return 0;
}
#endif /* LWIP_IPV4 && IP_SOF_BROADCAST_RECV */
return 1;
}
/* Only need to check PCB if incoming IP version matches PCB IP version */
if(IP_ADDR_PCB_VERSION_MATCH_EXACT(pcb, ip_current_dest_addr())) {
LWIP_ASSERT("UDP PCB: inconsistent local/remote IP versions", IP_IS_V6_VAL(pcb->local_ip) == IP_IS_V6_VAL(pcb->remote_ip));
#if LWIP_IPV4
/* Special case: IPv4 broadcast: all or broadcasts in my subnet
* Note: broadcast variable can only be 1 if it is an IPv4 broadcast */
if(broadcast != 0) {
#if IP_SOF_BROADCAST_RECV
if(ip_get_option(pcb, SOF_BROADCAST))
#endif /* IP_SOF_BROADCAST_RECV */
{
if(ip4_addr_isany(ip_2_ip4(&pcb->local_ip)) ||
((ip4_current_dest_addr()->addr == IPADDR_BROADCAST)) ||
ip4_addr_netcmp(ip_2_ip4(&pcb->local_ip), ip4_current_dest_addr(), netif_ip4_netmask(inp))) {
return 1;
}
}
} else
#endif /* LWIP_IPV4 */
/* Handle IPv4 and IPv6: all, multicast or exact match */
if(ip_addr_isany(&pcb->local_ip) ||
#if LWIP_IPV6_MLD
(ip_current_is_v6() && ip6_addr_ismulticast(ip6_current_dest_addr())) ||
#endif /* LWIP_IPV6_MLD */
#if LWIP_IGMP
(!ip_current_is_v6() && ip4_addr_ismulticast(ip4_current_dest_addr())) ||
#endif /* LWIP_IGMP */
ip_addr_cmp(&pcb->local_ip, ip_current_dest_addr())) {
return 1;
}
}
return 0;
}
static u8_t
raw_input_match(struct raw_pcb *pcb, u8_t broadcast)
{
LWIP_UNUSED_ARG(broadcast); /* in IPv6 only case */
#if LWIP_IPV4 && LWIP_IPV6
/* Dual-stack: PCBs listening to any IP type also listen to any IP address */
if (IP_IS_ANY_TYPE_VAL(pcb->local_ip)) {
#if IP_SOF_BROADCAST_RECV
if ((broadcast != 0) && !ip_get_option(pcb, SOF_BROADCAST)) {
return 0;
}
#endif /* IP_SOF_BROADCAST_RECV */
return 1;
}
#endif /* LWIP_IPV4 && LWIP_IPV6 */
/* Only need to check PCB if incoming IP version matches PCB IP version */
if (IP_ADDR_PCB_VERSION_MATCH_EXACT(pcb, ip_current_dest_addr())) {
#if LWIP_IPV4
/* Special case: IPv4 broadcast: receive all broadcasts
* Note: broadcast variable can only be 1 if it is an IPv4 broadcast */
if (broadcast != 0) {
#if IP_SOF_BROADCAST_RECV
if (ip_get_option(pcb, SOF_BROADCAST))
#endif /* IP_SOF_BROADCAST_RECV */
{
if (ip4_addr_isany(ip_2_ip4(&pcb->local_ip))) {
return 1;
}
}
} else
#endif /* LWIP_IPV4 */
/* Handle IPv4 and IPv6: catch all or exact match */
if (ip_addr_isany(&pcb->local_ip) ||
ip_addr_cmp(&pcb->local_ip, ip_current_dest_addr())) {
return 1;
}
}
return 0;
}
