mirror of
https://github.com/espressif/esp-idf.git
synced 2024-10-05 20:47:46 -04:00
333 lines
10 KiB
C
333 lines
10 KiB
C
|
|
/*
|
|
* MDNS Server Networking
|
|
*
|
|
*/
|
|
#include <string.h>
|
|
#include "mdns_networking.h"
|
|
#include "esp_log.h"
|
|
|
|
extern mdns_server_t * _mdns_server;
|
|
|
|
/*
|
|
* MDNS Server Networking
|
|
*
|
|
*/
|
|
static const char *TAG = "MDNS_Networking";
|
|
|
|
/**
|
|
* @brief the receive callback of the raw udp api. Packets are received here
|
|
*
|
|
*/
|
|
static void _udp_recv(void *arg, struct udp_pcb *upcb, struct pbuf *pb, const ip_addr_t *raddr, uint16_t rport)
|
|
{
|
|
|
|
uint8_t i;
|
|
while (pb != NULL) {
|
|
struct pbuf * this_pb = pb;
|
|
pb = pb->next;
|
|
this_pb->next = NULL;
|
|
|
|
mdns_rx_packet_t * packet = (mdns_rx_packet_t *)malloc(sizeof(mdns_rx_packet_t));
|
|
if (!packet) {
|
|
HOOK_MALLOC_FAILED;
|
|
//missed packet - no memory
|
|
pbuf_free(this_pb);
|
|
continue;
|
|
}
|
|
|
|
packet->tcpip_if = TCPIP_ADAPTER_IF_MAX;
|
|
packet->pb = this_pb;
|
|
packet->src_port = rport;
|
|
memcpy(&packet->src, raddr, sizeof(ip_addr_t));
|
|
packet->dest.type = packet->src.type;
|
|
|
|
if (packet->src.type == IPADDR_TYPE_V4) {
|
|
packet->ip_protocol = MDNS_IP_PROTOCOL_V4;
|
|
struct ip_hdr * iphdr = (struct ip_hdr *)(((uint8_t *)(packet->pb->payload)) - UDP_HLEN - IP_HLEN);
|
|
packet->dest.u_addr.ip4.addr = iphdr->dest.addr;
|
|
} else {
|
|
packet->ip_protocol = MDNS_IP_PROTOCOL_V6;
|
|
struct ip6_hdr * ip6hdr = (struct ip6_hdr *)(((uint8_t *)(packet->pb->payload)) - UDP_HLEN - IP6_HLEN);
|
|
memcpy(&packet->dest.u_addr.ip6.addr, (uint8_t *)ip6hdr->dest.addr, 16);
|
|
}
|
|
packet->multicast = ip_addr_ismulticast(&(packet->dest));
|
|
|
|
//lwip does not return the proper pcb if you have more than one for the same multicast address (but different interfaces)
|
|
struct netif * netif = NULL;
|
|
void * nif = NULL;
|
|
struct udp_pcb * pcb = NULL;
|
|
for (i=0; i<TCPIP_ADAPTER_IF_MAX; i++) {
|
|
pcb = _mdns_server->interfaces[i].pcbs[packet->ip_protocol].pcb;
|
|
tcpip_adapter_get_netif (i, &nif);
|
|
netif = (struct netif *)nif;
|
|
if (pcb && netif && netif == ip_current_input_netif ()) {
|
|
if (packet->src.type == IPADDR_TYPE_V4) {
|
|
if ((packet->src.u_addr.ip4.addr & netif->netmask.u_addr.ip4.addr) != (netif->ip_addr.u_addr.ip4.addr & netif->netmask.u_addr.ip4.addr)) {
|
|
//packet source is not in the same subnet
|
|
pcb = NULL;
|
|
break;
|
|
}
|
|
}
|
|
packet->tcpip_if = i;
|
|
break;
|
|
}
|
|
pcb = NULL;
|
|
}
|
|
|
|
if (!pcb || !_mdns_server || !_mdns_server->action_queue
|
|
|| _mdns_send_rx_action(packet) != ESP_OK) {
|
|
pbuf_free(this_pb);
|
|
free(packet);
|
|
}
|
|
}
|
|
|
|
}
|
|
|
|
/**
|
|
* @brief Stop PCB Main code
|
|
*/
|
|
static void _udp_pcb_deinit(tcpip_adapter_if_t tcpip_if, mdns_ip_protocol_t ip_protocol)
|
|
{
|
|
if (!_mdns_server) {
|
|
return;
|
|
}
|
|
mdns_pcb_t * _pcb = &_mdns_server->interfaces[tcpip_if].pcbs[ip_protocol];
|
|
if (_pcb->pcb) {
|
|
_pcb->state = PCB_OFF;
|
|
udp_recv(_pcb->pcb, NULL, NULL);
|
|
udp_disconnect(_pcb->pcb);
|
|
udp_remove(_pcb->pcb);
|
|
free(_pcb->probe_services);
|
|
_pcb->pcb = NULL;
|
|
_pcb->probe_ip = false;
|
|
_pcb->probe_services = NULL;
|
|
_pcb->probe_services_len = 0;
|
|
_pcb->probe_running = false;
|
|
_pcb->failed_probes = 0;
|
|
}
|
|
}
|
|
|
|
|
|
/**
|
|
* @brief Start PCB V4
|
|
*/
|
|
static esp_err_t _udp_pcb_v4_init(tcpip_adapter_if_t tcpip_if)
|
|
{
|
|
tcpip_adapter_ip_info_t if_ip_info;
|
|
|
|
if (!_mdns_server || _mdns_server->interfaces[tcpip_if].pcbs[MDNS_IP_PROTOCOL_V4].pcb) {
|
|
return ESP_ERR_INVALID_STATE;
|
|
}
|
|
|
|
if (tcpip_adapter_get_ip_info(tcpip_if, &if_ip_info) || if_ip_info.ip.addr == 0) {
|
|
return ESP_ERR_INVALID_ARG;
|
|
}
|
|
|
|
ip_addr_t interface_addr = IPADDR4_INIT(if_ip_info.ip.addr);
|
|
|
|
ip_addr_t multicast_addr;
|
|
IP_ADDR4(&multicast_addr, 224, 0, 0, 251);
|
|
|
|
if (igmp_joingroup((const struct ip4_addr *)&interface_addr.u_addr.ip4, (const struct ip4_addr *)&multicast_addr.u_addr.ip4)) {
|
|
return ESP_ERR_INVALID_STATE;
|
|
}
|
|
|
|
struct udp_pcb * pcb = udp_new_ip_type(IPADDR_TYPE_V4);
|
|
if (!pcb) {
|
|
return ESP_ERR_NO_MEM;
|
|
}
|
|
|
|
if (udp_bind(pcb, &interface_addr, MDNS_SERVICE_PORT) != 0) {
|
|
udp_remove(pcb);
|
|
return ESP_ERR_INVALID_STATE;
|
|
}
|
|
|
|
pcb->mcast_ttl = 1;
|
|
pcb->remote_port = MDNS_SERVICE_PORT;
|
|
ip_addr_copy(pcb->multicast_ip, interface_addr);
|
|
ip_addr_copy(pcb->remote_ip, multicast_addr);
|
|
ip_addr_copy(_mdns_server->interfaces[tcpip_if].pcbs[MDNS_IP_PROTOCOL_V4].if_addr, interface_addr);
|
|
|
|
_mdns_server->interfaces[tcpip_if].pcbs[MDNS_IP_PROTOCOL_V4].pcb = pcb;
|
|
_mdns_server->interfaces[tcpip_if].pcbs[MDNS_IP_PROTOCOL_V4].failed_probes = 0;
|
|
udp_recv(pcb, &_udp_recv, _mdns_server);
|
|
|
|
return ESP_OK;
|
|
}
|
|
|
|
/**
|
|
* @brief Start PCB V6
|
|
*/
|
|
static esp_err_t _udp_pcb_v6_init(tcpip_adapter_if_t tcpip_if)
|
|
{
|
|
ip_addr_t multicast_addr = IPADDR6_INIT(0x000002ff, 0, 0, 0xfb000000);
|
|
ip_addr_t interface_addr;
|
|
interface_addr.type = IPADDR_TYPE_V6;
|
|
|
|
if (!_mdns_server || _mdns_server->interfaces[tcpip_if].pcbs[MDNS_IP_PROTOCOL_V6].pcb) {
|
|
return ESP_ERR_INVALID_STATE;
|
|
}
|
|
|
|
if (tcpip_adapter_get_ip6_linklocal(tcpip_if, &interface_addr.u_addr.ip6)) {
|
|
return ESP_ERR_INVALID_ARG;
|
|
}
|
|
|
|
if (mld6_joingroup(&(interface_addr.u_addr.ip6), &(multicast_addr.u_addr.ip6))) {
|
|
return ESP_ERR_INVALID_STATE;
|
|
}
|
|
|
|
struct udp_pcb * pcb = udp_new_ip_type(IPADDR_TYPE_V6);
|
|
if (!pcb) {
|
|
return ESP_ERR_NO_MEM;
|
|
}
|
|
|
|
if (udp_bind(pcb, &interface_addr, MDNS_SERVICE_PORT) != 0) {
|
|
udp_remove(pcb);
|
|
return ESP_ERR_INVALID_STATE;
|
|
}
|
|
|
|
pcb->remote_port = MDNS_SERVICE_PORT;
|
|
ip_addr_copy(pcb->remote_ip, multicast_addr);
|
|
ip_addr_copy(_mdns_server->interfaces[tcpip_if].pcbs[MDNS_IP_PROTOCOL_V6].if_addr, interface_addr);
|
|
|
|
_mdns_server->interfaces[tcpip_if].pcbs[MDNS_IP_PROTOCOL_V6].pcb = pcb;
|
|
_mdns_server->interfaces[tcpip_if].pcbs[MDNS_IP_PROTOCOL_V6].failed_probes = 0;
|
|
udp_recv(pcb, &_udp_recv, _mdns_server);
|
|
|
|
return ESP_OK;
|
|
}
|
|
|
|
/**
|
|
* @brief Start PCB Main code
|
|
*/
|
|
static esp_err_t _udp_pcb_init(tcpip_adapter_if_t tcpip_if, mdns_ip_protocol_t ip_protocol)
|
|
{
|
|
if (ip_protocol == MDNS_IP_PROTOCOL_V4) {
|
|
return _udp_pcb_v4_init(tcpip_if);
|
|
} else if (ip_protocol == MDNS_IP_PROTOCOL_V6) {
|
|
return _udp_pcb_v6_init(tcpip_if);
|
|
}
|
|
return ESP_ERR_INVALID_ARG;
|
|
}
|
|
|
|
typedef struct {
|
|
struct tcpip_api_call call;
|
|
tcpip_adapter_if_t tcpip_if;
|
|
mdns_ip_protocol_t ip_protocol;
|
|
struct pbuf *pbt;
|
|
const ip_addr_t *ip;
|
|
uint16_t port;
|
|
esp_err_t err;
|
|
} mdns_api_call_t;
|
|
|
|
/**
|
|
* @brief Start PCB from LwIP thread
|
|
*/
|
|
static err_t _mdns_pcb_init_api(struct tcpip_api_call *api_call_msg)
|
|
{
|
|
mdns_api_call_t * msg = (mdns_api_call_t *)api_call_msg;
|
|
msg->err = _udp_pcb_init(msg->tcpip_if, msg->ip_protocol);
|
|
return msg->err;
|
|
}
|
|
|
|
/**
|
|
* @brief Stop PCB from LwIP thread
|
|
*/
|
|
static err_t _mdns_pcb_deinit_api(struct tcpip_api_call *api_call_msg)
|
|
{
|
|
mdns_api_call_t * msg = (mdns_api_call_t *)api_call_msg;
|
|
_udp_pcb_deinit(msg->tcpip_if, msg->ip_protocol);
|
|
msg->err = ESP_OK;
|
|
return ESP_OK;
|
|
}
|
|
|
|
/*
|
|
* Non-static functions below are
|
|
* - _mdns prefixed
|
|
* - commented in mdns_networking.h header
|
|
*/
|
|
esp_err_t _mdns_pcb_init(tcpip_adapter_if_t tcpip_if, mdns_ip_protocol_t ip_protocol)
|
|
{
|
|
mdns_api_call_t msg = {
|
|
.tcpip_if = tcpip_if,
|
|
.ip_protocol = ip_protocol
|
|
};
|
|
tcpip_api_call(_mdns_pcb_init_api, &msg.call);
|
|
return msg.err;
|
|
}
|
|
|
|
esp_err_t _mdns_pcb_deinit(tcpip_adapter_if_t tcpip_if, mdns_ip_protocol_t ip_protocol)
|
|
{
|
|
mdns_api_call_t msg = {
|
|
.tcpip_if = tcpip_if,
|
|
.ip_protocol = ip_protocol
|
|
};
|
|
tcpip_api_call(_mdns_pcb_deinit_api, &msg.call);
|
|
return msg.err;
|
|
}
|
|
|
|
static err_t _mdns_udp_pcb_write_api(struct tcpip_api_call *api_call_msg)
|
|
{
|
|
void * nif = NULL;
|
|
mdns_api_call_t * msg = (mdns_api_call_t *)api_call_msg;
|
|
mdns_pcb_t * _pcb = &_mdns_server->interfaces[msg->tcpip_if].pcbs[msg->ip_protocol];
|
|
esp_err_t err = tcpip_adapter_get_netif(msg->tcpip_if, &nif);
|
|
if (err) {
|
|
pbuf_free(msg->pbt);
|
|
msg->err = err;
|
|
return err;
|
|
}
|
|
err = udp_sendto_if (_pcb->pcb, msg->pbt, msg->ip, msg->port, (struct netif *)nif);
|
|
pbuf_free(msg->pbt);
|
|
msg->err = err;
|
|
return err;
|
|
}
|
|
|
|
size_t _mdns_udp_pcb_write(tcpip_adapter_if_t tcpip_if, mdns_ip_protocol_t ip_protocol, const ip_addr_t *ip, uint16_t port, uint8_t * data, size_t len)
|
|
{
|
|
struct pbuf* pbt = pbuf_alloc(PBUF_TRANSPORT, len, PBUF_RAM);
|
|
if (pbt == NULL) {
|
|
return 0;
|
|
}
|
|
memcpy((uint8_t *)pbt->payload, data, len);
|
|
|
|
mdns_api_call_t msg = {
|
|
.tcpip_if = tcpip_if,
|
|
.ip_protocol = ip_protocol,
|
|
.pbt = pbt,
|
|
.ip = ip,
|
|
.port = port
|
|
};
|
|
tcpip_api_call(_mdns_udp_pcb_write_api, &msg.call);
|
|
|
|
if (msg.err) {
|
|
return 0;
|
|
}
|
|
return len;
|
|
}
|
|
|
|
bool _mdns_pcb_is_ip_updated(tcpip_adapter_if_t tcpip_if, mdns_ip_protocol_t ip_protocol)
|
|
{
|
|
tcpip_adapter_ip_info_t if_ip_info;
|
|
if (!_mdns_server || !_mdns_server->interfaces[tcpip_if].pcbs[ip_protocol].pcb) {
|
|
return false;
|
|
}
|
|
mdns_pcb_t pcb = _mdns_server->interfaces[tcpip_if].pcbs[ip_protocol];
|
|
|
|
if (ip_protocol == MDNS_IP_PROTOCOL_V4) {
|
|
if (tcpip_adapter_get_ip_info(tcpip_if, &if_ip_info) || if_ip_info.ip.addr == 0) {
|
|
return false;
|
|
}
|
|
ip_addr_t interface_addr = IPADDR4_INIT(if_ip_info.ip.addr);
|
|
return !ip_addr_cmp(&interface_addr, &pcb.if_addr);
|
|
} else if (ip_protocol == MDNS_IP_PROTOCOL_V6) {
|
|
ip_addr_t interface_addr;
|
|
interface_addr.type = IPADDR_TYPE_V6;
|
|
if (tcpip_adapter_get_ip6_linklocal(tcpip_if, &interface_addr.u_addr.ip6)) {
|
|
return false;
|
|
}
|
|
return !ip_addr_cmp(&interface_addr, &pcb.if_addr);
|
|
}
|
|
return false;
|
|
} |