【发布时间】：2015-04-28 11:56:25
【问题描述】：
如何使用 tcp/ip 在两个不同系统之间建立客户端-服务器通信？我已经完成了服务器和客户端的代码，但是当我运行代码时，没有错误，而且我看不到文件。我附上代码以供进一步参考。
服务器代码：
#include<stdio.h>
#include<string.h>
#include<sys/types.h>
#include<sys/socket.h>
#include<arpa/inet.h>
#include<stdlib.h>
#include<sys/ioctl.h>
#include<stdarg.h>
#include<setjmp.h>
#include<errno.h>
#include<assert.h>
//using namespace std;
long long int send_audio(long long int socket)
{
FILE *audio;
long long int size, read_size, stat, packet_index;
char send_buffer[1024000], read_buffer[1024000];
packet_index = 1;
audio = fopen("/home/sosdt009/Desktop/ROBO.mp3", "r");
printf("Getting audio Size\n");
if(audio == NULL)
{
printf("Error Opening audio File");
}
fseek(audio, 0, SEEK_END);
size = ftell(audio);
fseek(audio, 0, SEEK_SET);
printf("Total audio size: %lli \n", size);
//Send audio Size
printf("Sending audio Size\n");
write(socket, (void *)&size, sizeof(int));
//Send audio as Byte Array
printf("Sending audio as Byte Array\n");
do
{
//Read while we get errors that are due to signals.
stat = read(socket, &read_buffer, 255);
printf("Bytes read: %lli \n", stat);
}
while(stat < 0);
printf("Received data in socket\n");
printf("Socket data: %s\n", read_buffer);
while(!feof(audio))
{
//while(packet_index = 1){
//Read from the file into our send buffer
read_size = fread(send_buffer, 1, sizeof(send_buffer) - 1, audio);
//Send data through our socket
do
{
stat = write(socket, send_buffer, read_size);
}
while(stat < 0);
printf("Packet Number: %lli \n", packet_index);
printf("Packet Size Sent: %lli \n", read_size);
printf(" \n");
printf(" \n");
packet_index++;
//Zero out our send buffer
bzero(send_buffer, sizeof(send_buffer));
}
}
long long int main(int argc, char *argv[])
{
long long int socket_desc, new_socket, c, read_size, buffer = 0;
struct sockaddr_in server, client;
char *readin;
//Create socket
socket_desc = socket(AF_INET, SOCK_STREAM, 0);
if(socket_desc == -1)
{
printf("Could not create socket");
}
//Prepare the sockaddr_in structure
server.sin_family = AF_INET;
server.sin_addr.s_addr = INADDR_ANY;
server.sin_port = htons(6888);
//Bind
if(bind(socket_desc, (struct sockaddr *)&server, sizeof(server)) < 0)
{
puts("bind failed");
return 1;
}
puts("Bind completed");
//Listen
listen(socket_desc, 3);
//Accept and incoming connection
puts("Waiting for incoming connections...");
c = sizeof(struct sockaddr_in);
if((new_socket = accept(socket_desc, (struct sockaddr *)&client, (socklen_t *)&c)))
{
puts("Connection accepted");
}
fflush(stdout);
if(new_socket < 0)
{
perror("Accept Failed");
return 1;
}
send_audio(new_socket);
close(socket_desc);
fflush(stdout);
return 0;
}
客户端代码：
#include<stdio.h>
#include<string.h>
#include<stdlib.h>
#include<sys/socket.h>
#include<sys/ioctl.h>
#include<sys/types.h>
#include<arpa/inet.h>
#include<unistd.h>
//using namespace std;
//This function is to be used once we have confirmed that an audio is to be sent //It should read and output an audio file
long long int receive_audio(long long int socket)
{
long long int buffersize = 0, recv_size = 0, size = 0, read_size, write_size;
char audioarray[1024000], verify = '1', errno;
FILE *audio;
//Find the size of the audio
read(socket, &size, sizeof(int));
//Send our verification signal
write(socket, &verify, sizeof(char));
//Make sure that the size is bigger than 0
if(size <= 0)
{
printf("Error has occurred. Size less than or equal to 0 \n"); return -1;
}
audio = fopen("/home/sosdt009/Desktop/received.mp3", "w");
if(audio == NULL)
{
printf("Error has occurred. audio file could not be opened \n"); return -1;
}
//Loop while we have not received the entire file yet
while(recv_size < size)
{
ioctl(socket, FIONREAD, &buffersize);
//We check to see if there is data to be read from the socket
if(buffersize > 0)
{
if(read_size = read(socket, audioarray, buffersize) < 0){
printf("%s", strerror(errno));
}
//Write the currently read data into our audio file
write_size = fwrite(audioarray, 1, (buffersize), audio);
/* if(write_size != buffersize)
{
printf("write and buffer sizes are wrong \n");
}
if(read_size != write_size)
{
printf("error in read write \n");
} */
//Increment the total number of bytes read
recv_size += read_size;
//Send our handshake verification info
write(socket, &verify, sizeof(char));
} }
fclose(audio); printf("audio successfully Received! \n"); return 1; }
long long int main(int argc, char *argv[]) {
long long int socket_desc; struct sockaddr_in server; char *parray, errno;
//Create socket
socket_desc = socket(AF_INET, SOCK_STREAM, 0);
if(socket_desc == -1)
{
printf("Could not create socket \n");
}
memset(&server, 0, sizeof(server)); server.sin_addr.s_addr = ("10.170.0.40");; server.sin_family = AF_INET; server.sin_port = htons(6888);
//Connect to remote server
if(connect(socket_desc, (struct sockaddr *)&server, sizeof(server)) < 0)
{
// printf(strerror(errno));
close(socket_desc);
printf("Connect Error \n");
return -1; }
puts("Connected \n");
receive_audio(socket_desc);
close(socket_desc);
return 0; }
【问题讨论】：
-
您打印了很多信息。那么你看到了什么？会发生什么？
-
请修复您的格式问题，我很难阅读代码
-
long long int main??? -
while (stat < 0);-->>while (stat > 0);（还有很多其他错误） -
long long int main