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#include <stdlib.h>
#include <stdint.h>
#include <string.h>
#include <freertos/FreeRTOS.h>
#include <freertos/semphr.h>
#include <freertos/task.h>
#include <esp_system.h>
#include <esp_log.h>
#include <esp_err.h>
#include <lwip/sockets.h>
#include <lwip/err.h>
#include <lwip/sockets.h>
#include <lwip/sys.h>
#include <lwip/netdb.h>
#include <lwip/dns.h>
#include "eos.h"
#include "net.h"
#include "sock.h"
static const char *TAG = "EOS SOCK";
static SemaphoreHandle_t mutex;
static int _socks[EOS_SOCK_MAX_SOCK];
static int t_open_dgram(void) {
struct sockaddr_in _myaddr;
int sock;
sock = socket(PF_INET, SOCK_DGRAM, 0);
if (sock < 0) return sock;
memset((char *)&_myaddr, 0, sizeof(_myaddr));
_myaddr.sin_family = AF_INET;
_myaddr.sin_addr.s_addr = htonl(INADDR_ANY);
_myaddr.sin_port = htons(3000);
int rv = bind(sock, (struct sockaddr *)&_myaddr, sizeof(_myaddr));
if (rv < 0) {
close(sock);
return rv;
}
return sock;
}
static void t_close(int sock) {
close(sock);
}
static ssize_t t_sendto(int sock, void *msg, size_t msg_size, EOSNetAddr *addr) {
struct sockaddr_in servaddr;
memset((void *)&servaddr, 0, sizeof(servaddr));
servaddr.sin_family = AF_INET;
servaddr.sin_port = addr->port;
memcpy((void *)&servaddr.sin_addr, addr->host, sizeof(addr->host));
return sendto(sock, msg, msg_size, 0, (struct sockaddr *)&servaddr, sizeof(servaddr));
}
static ssize_t t_recvfrom(int sock, void *msg, size_t msg_size, EOSNetAddr *addr) {
struct sockaddr_in servaddr;
socklen_t addrlen = sizeof(servaddr);
memset((void *)&servaddr, 0, sizeof(servaddr));
ssize_t recvlen = recvfrom(sock, msg, msg_size, 0, (struct sockaddr *)&servaddr, &addrlen);
if (recvlen < 0) return recvlen;
if (addr) {
addr->port = servaddr.sin_port;
memcpy(addr->host, (void *)&servaddr.sin_addr, sizeof(addr->host));
}
return recvlen;
}
static void udp_rcvr_task(void *pvParameters) {
EOSNetAddr addr;
uint8_t esock = (uint8_t)pvParameters;
int sock = _socks[esock-1];
unsigned char *buf;
do {
ssize_t rv;
buf = eos_net_alloc();
rv = t_recvfrom(sock, buf+EOS_SOCK_SIZE_UDP_HDR, EOS_NET_SIZE_BUF-EOS_SOCK_SIZE_UDP_HDR, &addr);
if (rv < 0) {
sock = 0;
eos_net_free(buf);
ESP_LOGE(TAG, "UDP RECV ERR:%d", rv);
continue;
}
buf[0] = EOS_SOCK_MTYPE_PKT;
buf[1] = esock;
memcpy(buf+2, addr.host, sizeof(addr.host));
memcpy(buf+2+sizeof(addr.host), &addr.port, sizeof(addr.port));
eos_net_send(EOS_NET_MTYPE_SOCK, buf, rv+EOS_SOCK_SIZE_UDP_HDR);
} while(sock);
xSemaphoreTake(mutex, portMAX_DELAY);
_socks[esock-1] = 0;
xSemaphoreGive(mutex);
vTaskDelete(NULL);
}
static void sock_handler(unsigned char type, unsigned char *buffer, uint16_t size) {
EOSNetAddr addr;
uint8_t esock;
int sock, i;
unsigned char *rbuf;
if (size < 1) return;
switch(buffer[0]) {
case EOS_SOCK_MTYPE_PKT:
if (size < EOS_SOCK_SIZE_UDP_HDR) return;
sock = _socks[buffer[1]-1];
memcpy(addr.host, buffer+2, sizeof(addr.host));
memcpy(&addr.port, buffer+2+sizeof(addr.host), sizeof(addr.port));
t_sendto(sock, buffer+EOS_SOCK_SIZE_UDP_HDR, size-EOS_SOCK_SIZE_UDP_HDR, &addr);
break;
case EOS_SOCK_MTYPE_OPEN_DGRAM:
sock = t_open_dgram();
esock = 0;
if (sock > 0) {
xSemaphoreTake(mutex, portMAX_DELAY);
for (i=0; i<EOS_SOCK_MAX_SOCK; i++) {
if (_socks[i] == 0) {
esock = i+1;
_socks[i] = sock;
}
}
xSemaphoreGive(mutex);
}
// xTaskCreatePinnedToCore(&sock_receiver, "sock_receiver", EOS_TASK_SSIZE_UDP_RCVR, (void *)esock, EOS_TASK_PRIORITY_UDP_RCVR, NULL, 1);
xTaskCreate(&udp_rcvr_task, "udp_rcvr", EOS_TASK_SSIZE_UDP_RCVR, (void *)esock, EOS_TASK_PRIORITY_UDP_RCVR, NULL);
rbuf = eos_net_alloc();
rbuf[0] = EOS_SOCK_MTYPE_OPEN_DGRAM;
rbuf[1] = esock;
eos_net_send(EOS_NET_MTYPE_SOCK, rbuf, 2);
break;
case EOS_SOCK_MTYPE_CLOSE:
if (size < 2) return;
sock = _socks[buffer[1]-1];
t_close(sock);
break;
default:
break;
}
}
void eos_sock_init(void) {
mutex = xSemaphoreCreateBinary();
xSemaphoreGive(mutex);
eos_net_set_handler(EOS_NET_MTYPE_SOCK, sock_handler);
ESP_LOGI(TAG, "INIT");
}
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