时将接收到的缓冲区转换为十六进制
美好的一天，
我试图发送一个"对象"槽插座。结构看起来像这样：
typedef struct header_file
{
char chunk_id[4];
int chunk_size;
char format[4];
char subchunk1_id[4];
int subchunk1_size;
short int audio_format;
short int num_channels;
int sample_rate;
int byte_rate;
short int block_align;
short int bits_per_sample;
char subchunk2_id[4];
int subchunk2_size;
} header;
这是WAV声音文件的标题结构。要读取文件的那部分，我有：
FILE* infile = fopen("Sound.wav", "rb");
header *meta = (header*)malloc(sizeof(header));
if(infile){
fread(meta, 1, sizeof(header), infile);
}
到目前为止，如果我尝试显示结构中包含的所有信息，那就没问题了！但是，我应该通过插座发送此部分：
n = write(socket_fd, meta, sizeof(header));
也有效，但是在服务器端，它仅接收到：
RIFF*_
前4个字符是结构的数组chunk_id中的字符，chunk size是352042，在HEXA中给出0x00055F2A
我认为(至少我是这样认为(，由于零件的零，服务器将其读为角色，并猜猜0x00的含义是什么？无效的！字符串的结尾！我该如何解决？
事先感谢您的帮助
完成客户端代码
void* stream_audio(void *arg);
typedef struct header_file
{
char chunk_id[4];
int chunk_size;
char format[4];
char subchunk1_id[4];
int subchunk1_size;
short int audio_format;
short int num_channels;
int sample_rate;
int byte_rate;
short int block_align;
short int bits_per_sample;
char samples_id[4];
int samples_size;
} header;
typedef struct header_file* header_p;
int KEEP_ALIVE = 1;
int PORT_NO = 5002;
char SERVER_IP[20] = "127.0.0.1";
pthread_t t_id;
int main(int argc, char * argv[]) {
int terr;
terr = pthread_create(&t_id, NULL, &stream_audio, NULL);
pthread_join(t_id, NULL);
}
void* stream_audio(void *arg){
FILE * infile = fopen("../files/man1_nb.wav","rb"); // Source WAV audio file
int sockfd, portno, n;
struct sockaddr_in serv_addr;
struct hostent *server;
int count = 0; // For counting number of frames in wave file.
char buff16[2]; // short int used for 16 bit as input data format is 16 bit PCM audio
header_p meta = (header_p)malloc(sizeof(header)); // WAV file metadata fields
int nb;
portno = PORT_NO; // read port number from arguments
sockfd = socket(AF_INET, SOCK_STREAM, 0); // create socket
if (sockfd < 0) {
error("ERROR opening socket");
return ;
}
server = gethostbyname(SERVER_IP); // get host address from argument
if (server == NULL) {
fprintf(stderr,"ERROR, no such hostn");
return ;
}
// Create socket and connect to server
bzero((char *) &serv_addr, sizeof(serv_addr));
serv_addr.sin_family = AF_INET;
bcopy((char *)server->h_addr, (char *)&serv_addr.sin_addr.s_addr, server->h_length);
serv_addr.sin_port = htons(portno);
if (connect(sockfd,(struct sockaddr *)&serv_addr,sizeof(serv_addr)) < 0)
error("ERROR connecting");
// send header WAV file trhough socket
if (infile){
fread(meta, 1, sizeof(header), infile);
meta->chunk_size = 0;
n = write(sockfd,meta,sizeof(meta));
if (n < 0)
error("ERROR writing to socket");
} else return;
int counter = 0;
while (!feof(infile))
{
bzero(buff16, sizeof(buff16));
nb = fread(buff16,1,1,infile); // Reading data in chunks of 16 bits (2 bytes)
n = write(sockfd,buff16,sizeof(buff16));
if(!KEEP_ALIVE){
fclose(infile);
close(sockfd);
return;
}
}
fclose(infile);
close(sockfd);
return;
}
完成服务器代码
/* A simple server in the internet domain using TCP
The port number is passed as an argument */
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
void error(char *msg)
{
perror(msg);
exit(1);
}
int main(int argc, char *argv[])
{
int sockfd, newsockfd, portno, clilen;
char buffer[401];
struct sockaddr_in serv_addr, cli_addr;
int n;
if (argc < 2) {
fprintf(stderr,"ERROR, no port providedn");
exit(1);
}
sockfd = socket(AF_INET, SOCK_STREAM, 0);
if (sockfd < 0)
error("ERROR opening socket");
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)
error("ERROR on binding");
listen(sockfd,5);
clilen = sizeof(cli_addr);
newsockfd = accept(sockfd, (struct sockaddr *) &cli_addr, &clilen);
if (newsockfd < 0)
error("ERROR on accept");
bzero(buffer,401);
char temper[100];
sprintf(temper, "/home/user/Documents/manif/bin/receiver%d.wav", portno);
FILE *receiver = fopen(temper,"wb+");
int empty = 0;
while(1){
memset(buffer,0,400);
n = read(newsockfd,buffer,400);
if (n < 0){
error("ERROR reading from socket");
break;
}
else if(n>0){
fwrite(buffer,1, n, receiver);
} else break;
printf("%s %dn",buffer, n);
}
fclose(receiver);
close(sockfd);
return 0;
}
您通过网络发送的内容是包含多个元素的struct。但是，您正在尝试打印您所读的字符串的内容，但不是字符串。
您需要知道您收到的数据的格式并以这种格式阅读。
如果您仅用于调试目的打印，请循环循环读取并单独打印每个字节作为数字。您可能想在发件人侧进行相同的操作以比较它们。
此外，在客户端，您对feof的使用是不正确的。相反，您应该检查fread的返回值，以查看您是否到达文件端。这很可能是不匹配的原因。
printf将打印ascii，non ascii(将在屏幕上看起来垃圾(字符，直到遇到 0，这就是为什么您在屏幕上只能在屏幕上获得很少的字节，因为旁边的字节必须已经 0，如果您需要查看您需要单独显示结构的每个成员的数据，或者只需将接收到的套接字转换为在显示