SSTP Sample in C

main.c

// Ukagaka SSTP send sample
#define _WIN32_WINNT 0x0601  // Windows 7 later

#include <winsock2.h>
#include <ws2tcpip.h>
#include <wincrypt.h>
#include <stdio.h>

#pragma comment(lib, "ws2_32.lib")

int main(void)
{
    WSADATA wsaData;
    WSAStartup(MAKEWORD(2, 2), &wsaData);

    struct addrinfo hints;
    struct addrinfo* result;

    memset(&hints, 0x00, sizeof(hints));

    hints.ai_family = AF_INET;
    hints.ai_socktype = SOCK_STREAM;

    getaddrinfo(
        "127.0.0.1", // IP Address
        "9801",      // Port number
        &hints,
        &result);

    auto sock = socket(
        result->ai_family,
        result->ai_socktype,
        result->ai_protocol
    );

    connect(sock, result->ai_addr, (int)result->ai_addrlen);

    char requestBuffer[256];
    int requestBufferSize = sizeof(requestBuffer) / sizeof(requestBuffer[0]);

    sprintf_s(
        requestBuffer,
        requestBufferSize,
        "NOTIFY SSTP/1.5\r\n"                      \
        "Sender: Test\r\n"                         \
        "Event: OnRelease\r\n"                     \
        "Script: Test message by hakkadaikon.\r\n" \
        "Option: nodescript, notranslate\r\n"      \
        "Charset: UTF-8\r\n"
        "\r\n"
    );

    puts("------ SSTP request ---------");
    printf("%s", requestBuffer);
    puts("-----------------------------");

    send(sock, requestBuffer, requestBufferSize, 0);

    char buffer[4096];
    memset(buffer, 0x00, sizeof(buffer));

    // Receive SSTP response
    int len = recv(sock, buffer, sizeof(buffer), 0);
    if (len <= 0) {
        fprintf(stderr, "SSTP send failed \n");
        closesocket(sock);
        freeaddrinfo(result);
    }

    puts("------ SSTP response --------");
    printf("%s", buffer);
    puts("-----------------------------");

    // Clean up
    closesocket(sock);
    freeaddrinfo(result);
    WSACleanup();
    return 0;
}