比较从 C 中的套接字接收的字符串数据

#include <sys/socket.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <unistd.h>
#include<stdio.h>
#include <stdlib.h>
#include<string.h>

int main(int argc, char *argv[]) {
    int sockfd;
    int portno;
    socklen_t clilen;
    struct sockaddr_in serv_addr, cli_addr;
    int n;

    if (argc < 2) {
        fprintf(stderr, "ERROR, no port provided\n");
        exit(1);
    }

    sockfd = socket(AF_INET, SOCK_STREAM, 0);
    if (sockfd < 0) {
        perror("ERROR opening socket");
        exit(1);
    }

    bzero((char *) &serv_addr, sizeof(serv_addr));
    portno = atoi(argv[1]);
    serv_addr.sin_family = AF_INET;
    serv_addr.sin_addr.s_addr = INADDR_ANY;
    serv_addr.sin_port = htons(portno);

    if (bind(sockfd, (struct sockaddr *) &serv_addr, sizeof(serv_addr)) < 0) {
        perror("ERROR on binding");
        exit(1);
    }

    listen(sockfd, 5);
    clilen = sizeof(cli_addr);
    int newsockfd = accept(sockfd, (struct sockaddr *) &cli_addr, &clilen);
    if (newsockfd < 0) {
        perror("ERROR on accept");
        exit(1);
    }

    // 处理客户端连接请求
    // ...

    close(newsockfd);
    close(sockfd);
    return 0;
}

char buffer[256];
bzero(buffer, 256);
n = read(newsockfd, buffer, 255);
if (n < 0) {
    perror("ERROR reading from socket");
    exit(1);
}
printf("Here is the message: %s\n", buffer);