11_6

文件传输：在两台计算机之间进行文件的传递

客户端与服务器连接，客户端与服务器端不在同一个主机之上，要求客户端可以查看服务器端有哪些文件，删除文件，移动文件，归类文件，增添文件夹；下载文件；上传文件，断点续传。
几乎所有的服务器端程序都会有配置文件

自定义文件
(1)socket_info.conf

  1 #
  2 #
  3 
  4 #ip地址
  5 ips=127.0.0.1
  6 
  7 #端口
  8 port=6000
  9 
 10 #监听队列大小
 11 lismax=5

(2)ser.c

#include "sock_init.h"
#include "work_thread.h"

int main()
{
    int sockfd = socket_init();
    if ( sockfd == -1 )
    {
        printf("ser create sockfd failed\n");
        exit(0);
    }

    while( 1 )
    {
        struct sockaddr_in caddr;
        int len = sizeof(caddr);

        int c = accept(sockfd,(struct sockaddr*)&caddr,&len);
        if ( c < 0 )
        {
            continue;
        }

        printf("accept c=%d\n",c);

        thread_start(c);
    }
}

(3)makefile

all: ser

ser : ser.o sock_init.o work_thread.o  
	gcc -o ser ser.o sock_init.o work_thread.o -lpthread

ser.o : ser.c 
	gcc -c ser.c 

sock_init.o : sock_init.c
	gcc -c sock_init.c 

work_thread.o: work_thread.c 
	gcc -c work_thread.c

clean:
	rm -f *.o ser

(4)sock_init.h

#ifndef  __SOCK_INIT
#define  __SOCK_INIT

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

int socket_init();

#endif

(5)sock_init.c

#include "sock_init.h"

#define  IPS    "ips="
#define  PORT   "port="
#define  LISMAX "lismax="

struct sock_info
{
    char ips[32];
    short port;
    int lismax;
};

int read_sock_conf(struct sock_info * dt)
{
    if ( dt == NULL )
    {
        return -1;
    }

    FILE * fp = fopen("socket_info.conf","r");
    if ( fp == NULL )
    {
        printf("open socket_info.conf failed\n");
        return -1;
    }

    int index = 0;
    while( 1 )
    {
        char buff[128] = {0};
        char * s = fgets(buff,128,fp);
        if ( s == NULL )
        {
            break;
        }

        index++;

        if ( s[0] == '#' || s[0] == '\n' )
        {
            continue;
        }

        s[strlen(s)-1] = '\0';

        if ( strncmp(s,IPS,strlen(IPS)) == 0 )
        {
            strcpy(dt->ips,s+strlen(IPS));
        }
        else if ( strncmp(s,PORT,strlen(PORT)) == 0 )
        {
            dt->port = atoi(s+strlen(PORT));
        }
        else if ( strncmp(s,LISMAX,strlen(LISMAX)) == 0 )
        {
            dt->lismax=atoi(s+strlen(LISMAX));
        }
        else
        {
            printf("不识别的参数:line %d\n",index);
        }


    }

    fclose(fp);
    return 0;
}

int socket_init()
{
    struct sock_info data;
    if ( read_sock_conf(&data) == -1 )
    {
        return -1;
    }

    printf("ip=%s\n",data.ips);
    printf("port=%d\n",data.port);
    printf("lismax=%d\n",data.lismax);

    int sockfd = socket(AF_INET,SOCK_STREAM,0);
    if ( sockfd == -1 )
    {
        return -1;
    }

    struct sockaddr_in saddr;
    memset(&saddr,0,sizeof(saddr));
    saddr.sin_family = AF_INET;
    saddr.sin_port = htons(data.port);
    saddr.sin_addr.s_addr = inet_addr(data.ips);

    int res = bind(sockfd,(struct sockaddr*)&saddr,sizeof(saddr));
    if ( res == -1 )
    {
        return -1;
    }

    if ( listen(sockfd,data.lismax) == -1 )
    {
        return -1;
    }
    
    return sockfd;
}

(6)work_thread.h

#ifndef __THREAD_START
#define __THREAD_START
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <sys/socket.h>
#include <pthread.h>

void thread_start(int c);

#endif

(7)work_thread.c

#include "work_thread.h"

void* work_thread(void* arg)
{

}

void thread_start(int c)
{
    pthread_t id;
    pthread_create(&id,NULL,work_thread,(void*)c);
}