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Princess Pi
2026-05-26 22:16:15 -06:00
commit b031059f95
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socket-play/main/CMakeLists.txt
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idf_component_register(SRCS "socket-play.c"
INCLUDE_DIRS ".")
socket-play/main/idf_component.yml
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dependencies:
protocol_examples_tapif_io:
path: ${IDF_PATH}/examples/common_components/protocol_examples_tapif_io
rules:
- if: "target in [linux]"
protocol_examples_common:
path: ${IDF_PATH}/examples/common_components/protocol_examples_common
rules:
- if: "target not in [linux]"
socket-play/main/notes.txt
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https://pubs.opengroup.org/onlinepubs/007908799/xns/socket.html
https://docs.espressif.com/projects/esp-idf/en/stable/esp32/api-guides/lwip.html#bsd-sockets-api
setsockopt()
SO_REUSEADDR
SO_BROADCAST
SO_NO_CHECK ?
/* Socket protocol types (TCP/UDP/RAW) */
SOCK_RAW 3
struct raw_pcb * raw_new (u8_t proto);
err_t raw_connect (struct raw_pcb *pcb, const ip_addr_t *ipaddr);
void raw_disconnect (struct raw_pcb *pcb);
err_t raw_bind (struct raw_pcb *pcb, const ip_addr_t *ipaddr);
err_t raw_sendto (struct raw_pcb *pcb, struct pbuf *p, const ip_addr_t *ipaddr);
err_t raw_send (struct raw_pcb *pcb, struct pbuf *p);\
void raw_recv (struct raw_pcb *pcb, raw_recv_fn recv, void *recv_arg);
int addr_family = AF_INET;
int ip_protocol = 0;
https://lwip.fandom.com/wiki/Netconn_send
// socket(addr type (v6/v4) (AF_INET/AF_INET6),
// proto type (SOCK_STREAM (tcp)/SOCK_DGRAM (udp)/SOCK_RAW (raw)),
// ip protocol (IPPROTO_IP/IPPROTO_IPV6));
#include <string.h>
#include <sys/param.h>
#include "freertos/FreeRTOS.h"
#include "freertos/task.h"
#include "freertos/event_groups.h"
#include "esp_system.h"
#include "esp_event.h"
#include "esp_log.h"
#include "nvs_flash.h"
#include "esp_netif.h"
#include "protocol_examples_common.h"
#include "lwip/err.h"
#include "lwip/sockets.h"
#include "lwip/sys.h"
#include <lwip/netdb.h>
#define HOST_IP_ADDR "10.0.0.255"
#define PORT CONFIG_EXAMPLE_PORT 4444 // placeholder
int err;
int errno;
int sockfd;
static const char *payload = "Message from ESP32 ";
static const char* TAG = "PrincessPiError";
struct sockaddr_in dest_addr;
dest_addr.sin_addr.s_addr = inet_addr(HOST_IP_ADDR);
dest_addr.sin_family = AF_INET;
dest_addr.sin_port = htons(PORT);
int opt = 1;
// https://pubs.opengroup.org/onlinepubs/007908799/xns/socket.html
// https://docs.espressif.com/projects/esp-idf/en/stable/esp32/api-guides/lwip.html#bsd-sockets-api
if(sockfd = socket(AF_INET, SOCK_RAW, IPPROTO_IP) < 0) {
ESP_LOGE(TAG, "%d", errno);
}
setsockopt(sockfd, SOL_SOCKET, SO_BROADCAST, &opt, sizeof(opt));
setsockopt(sockfd, SOL_SOCKET, SO_ERROR, &err, &optlen);
if(err < 0) {
ESP_LOGE(TAG, "%d", err);
}
// sendto(sockefd, payloadf, strlen(payload), 0, IP_ADDR_BROADCAST, sizeof(IP_ADDR_BROADCAST));
sendto(sockfd, payload, strlen(payload), 0, (struct sockaddr *)&dest_addr, sizeof(dest_addr));
// setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, &opt, sizeof(opt));
/*
#define TNetConn struct netconn *
#define TNetBuf struct netbuf *
TNetConn netConn = netconn_new(NETCONN_RAW);
struct TIpAddr xIp;
xIp.addr = 10.0.0.1;
TNetBuf xNetBuf = netbuf_new();
xBuf = netbuf_alloc(xNetBuf, 0x100);
netconn_sendto(netConn, xBuf, IP_ADDR_BROADCAST, 4444);
//Pointer xBuf = mem_malloc(0x100); // Pointer type? huh I'm too high for this
// netbuf_alloc (newNetBuf, 0x100);
// memset(xBuf, 0xAA, 0x100);
// xBuf = "\x00\x00\xFF" // raw payload. need memcpy?
//netbuf_ref()
// netconn_sendto(connection, payload, dst ip, port)
// netconn_sendto(newNetconn, xBuf, xIP, );
// netconn_sendto(newNetconn, &newNetbuff);
*/
socket-play/main/socket-play.c
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#include <string.h>
#include <sys/param.h>
#include "freertos/FreeRTOS.h"
#include "freertos/task.h"
#include "freertos/event_groups.h"
#include "esp_system.h"
#include "esp_event.h"
#include "esp_log.h"
#include "nvs_flash.h"
#include "esp_netif.h"
#include "protocol_examples_common.h"
#include "lwip/err.h"
#include "lwip/sockets.h"
#include "lwip/sys.h"
#include <lwip/netdb.h>
#define DEST_IP_ADDR "10.0.0.255"
// #define PORT CONFIG_EXAMPLE_PORT 4444 // placeholder
int err;
int errno;
int sockfd;
float loopSeconds = 0.25;
int timeoutSecs = 10;
static const char *payload = "LETS FUCKING GOOOOO LFGGGGGGGGG";
static const char* TAGERR = "PrincessPiError";
static const char* TAGSUCC = "PrincessPiSuccess";
static void raw_send_task(void *pvParameters) {
// configure the sockaddr
/*
struct sockaddr_in dest_addr;
dest_addr.sin_addr.s_addr = inet_addr(HOST_IP_ADDR);
dest_addr.sin_family = AF_INET;
dest_addr.sin_port = htons(PORT);
*/
struct sockaddr_in dest_addr;
dest_addr.sin_addr.s_addr = inet_addr(DEST_IP_ADDR);
dest_addr.sin_family = AF_INET;
//dest_addr.sin_port = htons(PORT);
if((sockfd = socket(AF_INET, SOCK_RAW, IPPROTO_IP)) < 0) {
ESP_LOGE(TAGERR, "Error creating socket: %d", errno);
} else {
ESP_LOGI(TAGSUCC, "Socket created");
}
// option lengths
int opt = 1;
int optlen = sizeof(int);
// timeouts
struct timeval timeout;
timeout.tv_sec = timeoutSecs;
timeout.tv_usec = 0;
// options
setsockopt(sockfd, SOL_SOCKET, SO_RCVTIMEO, &timeout, sizeof timeout);
setsockopt(sockfd, SOL_SOCKET, SO_BROADCAST, &opt, sizeof(opt));
setsockopt(sockfd, SOL_SOCKET, SO_ERROR, &err, optlen);
if(err < 0) {
ESP_LOGE(TAGERR, "Error setting socket options: %d", err);
} else {
ESP_LOGI(TAGSUCC, "Socket options set");
}
while(1) {
// sendto(sockefd, payloadf, strlen(payload), 0, IP_ADDR_BROADCAST, sizeof(IP_ADDR_BROADCAST));
int sendErr = sendto(sockfd, payload, strlen(payload), 0, (struct sockaddr *)&dest_addr, sizeof(dest_addr));
if(sendErr < 0) {
ESP_LOGE(TAGERR, "Error sending: %d", err);
} else {
ESP_LOGI(TAGSUCC, "Sent!\n\tLooping every %f seconds\n\tDst: %s\n\tPayload: %s\n\tTimeout: %d\n", loopSeconds, DEST_IP_ADDR, payload, timeoutSecs);
}
// delay on loop
vTaskDelay((loopSeconds*1000) / portTICK_PERIOD_MS);
}
}
void app_main(void) {
// init shit
ESP_ERROR_CHECK(nvs_flash_init());
ESP_ERROR_CHECK(esp_netif_init());
ESP_ERROR_CHECK(esp_event_loop_create_default());
// wifi connect
ESP_ERROR_CHECK(example_connect());
// fork raw_send_task to FreeRTOS task
xTaskCreate(raw_send_task, "raw_send_task", 4096, NULL, 5, NULL);
}