客户端-服务器套接字C代码：“读取”后，服务器不执行代码，直到发送另一行

我正在编写一些代码来创建客户端-服务器连接。客户端将字符串发送到服务器，并且服务器应根据发送的内容来解析和打印字符串。

客户代码：

// Client side C/C++ program to demonstrate Socket programming
#include <stdio.h>
#include <sys/socket.h>
#include <stdlib.h>
#include <netinet/in.h>
#include <string.h>
#define PORT 8080

int main(int argc, char const *argv[]) {
    struct sockaddr_in address;
    int sock = 0, valread;
    struct sockaddr_in serv_addr;
    size_t len = 0;
    char *buffer = NULL;
    if ((sock = socket(AF_INET, SOCK_STREAM, 0)) < 0) {
        printf("\n Socket creation error \n");
        return -1;
    }

    memset(&serv_addr, '0', sizeof(serv_addr));

    serv_addr.sin_family = AF_INET;
    serv_addr.sin_port = htons(PORT);

    // Convert IPv4 and IPv6 addresses from text to binary form
    if (inet_pton(AF_INET, "127.0.0.1", &serv_addr.sin_addr) <= 0) {
        printf("\nInvalid address/ Address not supported \n");
        return -1;
    }

    if (connect(sock, (struct sockaddr *) &serv_addr, sizeof(serv_addr)) < 0) {
        printf("\nConnection Failed \n");
        return -1;
    }

    while(1) {
        getline(&buffer, &len, stdin);
        printf("Line sent: %s", buffer);
        send(sock, buffer, strlen(buffer), 0);
    }
}

服务器代码：

/*Required Headers*/

#include <sys/types.h>
#include <sys/socket.h>
#include <netdb.h>
#include <stdio.h>
#include<string.h>

int main()
{

    char str[100];
    int listen_fd, comm_fd;

    struct sockaddr_in servaddr;

    listen_fd = socket(AF_INET, SOCK_STREAM, 0);

    bzero( &servaddr, sizeof(servaddr));

    servaddr.sin_family = AF_INET;
    servaddr.sin_addr.s_addr = htons(INADDR_ANY);
    servaddr.sin_port = htons(8080);

    bind(listen_fd, (struct sockaddr *) &servaddr, sizeof(servaddr));

    listen(listen_fd, 10);

    comm_fd = accept(listen_fd, (struct sockaddr*) NULL, NULL);

    while(1)
    {
        bzero( str, 100);

        read(comm_fd,str,100);

        printf("Received: %s",str);
        if(strncmp(str, "NEW", 3) == 0)
        {
            printf("Client - NEW");
        }
        else if(strncmp(str, "FILE", 4) == 0)
        {
            printf("Client - FILE");
        }
        else if(strncmp(str, "NAME", 4) == 0)
        {
            strtok(str, ": ");
            printf("NAME: %s", str);
        }
        else if(strncmp(str, "DESCRIPTION", 11) == 0)
        {
            strtok(str, ": ");
            printf("DESCRIP: %s", str);
        }
        else if(strncmp(str, "PRINTER", 7) == 0)
        {
            strtok(str, ": ");
            printf("PRINTER: %s", str);
        }

    }
}

我期望发生的是，当我从客户端向服务器发送“ NEW”时，服务器打印“ Client-NEW”。然后，当我发送“ FILE”时，服务器将打印“ CLIENT-FILE”。发生了一次发送延迟的情况。因此，当我发送NEW消息时，服务器将打印“ Received：NEW”，但不会进入if检查以打印“ CLIENT-NEW”。然后，当我发送“ FILE”时，服务器将打印“ Client-NEWRecieved：FILE”。

我在这里可能做错了什么？