myvtm/Other/libRestfulFunc/SocketConnectImpl.cpp

#include "RestfulFunc.h"
#include<sys/socket.h>
#include<sys/types.h>
#include<netinet/in.h>
#include<netinet/ip_icmp.h>
#include<arpa/inet.h>
#include<unistd.h>
#include<sys/time.h>
#include <string.h>

int SocketConnectTest(const std::string& addrIP, int nPort, std::string& out_msg)
{
    int sockfd = socket(AF_INET, SOCK_STREAM, 0);
    if (sockfd < 0) {
        out_msg = "create socket failed:";
        out_msg += strerror(errno);
        return -1;
    }

    struct sockaddr_in serveraddr;
    bzero(&serveraddr, sizeof(serveraddr));
    serveraddr.sin_family = AF_INET;
    serveraddr.sin_port = htons(nPort);
    if (inet_pton(AF_INET, addrIP.c_str(), &serveraddr.sin_addr) < 0) {
        close(sockfd);
        out_msg = "inet_pton failed:";
        out_msg += strerror(errno);
        return -2;
    }

    if (0 > connect(sockfd, (struct sockaddr*)&serveraddr, sizeof(serveraddr))) {
        close(sockfd);
        out_msg = "connect failed:";
        out_msg += strerror(errno);
        return -3;
    }

    close(sockfd);
    return 0;
}