pcapserver.c

#include "stdio.h"
#include "stdlib.h"
#include "string.h"
#include "time.h"
#include "sys/types.h"
#include "sys/socket.h"
#include "netinet/in.h"

#define BUF_LEN 8192

char* response = "[{\"type\":2,\"name\":\"Integer Argument\",\"size\":4,\"mask\":-1,\"value\":12345},"
            "{\"type\":1,\"name\":\"String Argument\",\"size\":11,\"mask\":-1,\"value\":\"Hello World\"},"
            "{\"type\":3,\"name\":\"Buffer Argument\",\"size\":5,\"mask\":-1,\"value\":\"48454c4c4f\"},"
            "{\"type\":4,\"name\":\"Float Argument\",\"size\":4,\"mask\":-1,\"value\":1.234500}]";



int main(int argc, char *argv[])
{
    char buffer[BUF_LEN];
    struct sockaddr_in server_addr, client_addr;
    char temp[20];
    int server_fd, client_fd;
    int len, msg_size;


    if((server_fd = socket(AF_INET, SOCK_STREAM, 0)) == -1)
    {// 소켓 생성
        printf("Server : Can't open stream socket\n");
        exit(0);
    }
    memset(&server_addr, 0x00, sizeof(server_addr));
    //server_Addr 을 NULL로 초기화

    server_addr.sin_family = AF_INET;
    server_addr.sin_addr.s_addr = htonl(INADDR_ANY);
    server_addr.sin_port = htons(55555);
    //server_addr 셋팅

    if(bind(server_fd, (struct sockaddr *)&server_addr, sizeof(server_addr)) <0)
    {//bind() 호출
        printf("Server : Can't bind local address.\n");
        exit(0);
    }

    if(listen(server_fd, 5) < 0)
    {//소켓을 수동 대기모드로 설정
        printf("Server : Can't listening connect.\n");
        exit(0);
    }

    memset(buffer, 0x00, sizeof(buffer));
    printf("Server : wating connection request on port 55555\n");
    puts("Hard-Coded Response");
    printf("%s\n", response);

    len = sizeof(client_addr);
    while(1)
    {
        client_fd = accept(server_fd, (struct sockaddr *)&client_addr, &len);
        if(client_fd < 0)
        {
            printf("Server: accept failed.\n");
            exit(0);
        }
        inet_ntop(AF_INET, &client_addr.sin_addr.s_addr, temp, sizeof(temp));
        printf("Server : %s client connected.\n", temp);

        msg_size = read(client_fd, buffer, BUF_LEN);

        
        write(client_fd, response, strlen(response));
        close(client_fd);
        printf("Server : %s client closed.\n", temp);
    }
    close(server_fd);
    return 0;
}