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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(0);
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 = htons(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 = ntohs(servaddr.sin_port);
memcpy(addr->host, (void *)&servaddr.sin_addr, sizeof(addr->host));
}
return recvlen;
}
static void udp_rcvr_task(void *pvParameters) {
uint8_t sock_i = (uint8_t)pvParameters;
int sock = _socks[sock_i-1];
do {
EOSNetAddr addr;
unsigned char *buf, *_buf;
ssize_t rv;
buf = eos_net_alloc();
rv = t_recvfrom(sock, buf + EOS_SOCK_SIZE_UDP_HDR, EOS_NET_MTU - EOS_SOCK_SIZE_UDP_HDR, &addr);
if (rv < 0) {
eos_net_free(buf);
ESP_LOGE(TAG, "UDP RECV ERR:%d", rv);
break;
}
_buf = buf;
_buf[0] = EOS_SOCK_MTYPE_PKT;
_buf[1] = sock_i;
_buf += 2;
memcpy(_buf, addr.host, sizeof(addr.host));
_buf += sizeof(addr.host);
_buf[0] = addr.port >> 8;
_buf[1] = addr.port;
_buf += sizeof(addr.port);
eos_net_send(EOS_NET_MTYPE_SOCK, buf, rv + EOS_SOCK_SIZE_UDP_HDR);
} while (1);
xSemaphoreTake(mutex, portMAX_DELAY);
_socks[sock_i-1] = 0;
xSemaphoreGive(mutex);
vTaskDelete(NULL);
}
static void sock_handler(unsigned char _mtype, unsigned char *buffer, uint16_t buf_len) {
unsigned char mtype;
uint8_t sock_i;
int sock, i;
if (buf_len < 1) return;
mtype = buffer[0];
switch (mtype) {
case EOS_SOCK_MTYPE_PKT: {
EOSNetAddr addr;
if (buf_len < EOS_SOCK_SIZE_UDP_HDR) return;
sock_i = buffer[1]-1;
if (sock_i >= EOS_SOCK_MAX_SOCK) return;
sock = _socks[sock_i];
buffer += 2;
memcpy(addr.host, buffer, sizeof(addr.host));
buffer += sizeof(addr.host);
addr.port = (uint16_t)buffer[0] << 8;
addr.port |= (uint16_t)buffer[1];
buffer += sizeof(addr.port);
t_sendto(sock, buffer, buf_len - EOS_SOCK_SIZE_UDP_HDR, &addr);
break;
}
case EOS_SOCK_MTYPE_OPEN_DGRAM: {
sock = t_open_dgram();
sock_i = 0;
if (sock > 0) {
xSemaphoreTake(mutex, portMAX_DELAY);
for (i=0; i<EOS_SOCK_MAX_SOCK; i++) {
if (_socks[i] == 0) {
sock_i = i+1;
_socks[i] = sock;
break;
}
}
xSemaphoreGive(mutex);
}
if (sock_i) xTaskCreate(&udp_rcvr_task, "udp_rcvr", EOS_TASK_SSIZE_UDP_RCVR, (void *)sock_i, EOS_TASK_PRIORITY_UDP_RCVR, NULL);
buffer[0] = EOS_SOCK_MTYPE_OPEN_DGRAM;
buffer[1] = sock_i;
eos_net_reply(EOS_NET_MTYPE_SOCK, buffer, 2);
break;
}
case EOS_SOCK_MTYPE_CLOSE: {
if (buf_len < 2) return;
sock_i = buffer[1]-1;
if (sock_i >= EOS_SOCK_MAX_SOCK) return;
sock = _socks[sock_i];
t_close(sock);
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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