无法让我的客户端将数据发送到服务器，或者我的服务器从客户端接收数据。任何我想到为什么也许？来到这里之前，我已经多次尝试重写代码，没有运气。 UDP套接字仍然是新手，遇到了麻烦。我是否使服务器/客户端功能正确？或者他们搞砸了，这就是为什么它不能正常工作？提前感谢您解决此问题的任何帮助。
/********************************************************************
* svoip.c - Going to be a simple VOIP (Speak Over NET) application *
********************************************************************
* By Philip R. Simonson *
********************************************************************
*/
#define WIN32_LEAN_AND_MEAN
#include <winsock2.h>
#include <ws2tcpip.h>
#include <windows.h>
#include <mmsystem.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <conio.h>
#define ALIAS "random_str"
#define MYPORT "31337"
#define MAXDATA 1024
typedef BOOL bool;
#define false FALSE
#define true TRUE
/* packet structs */
struct PACKET {
char data[MAXDATA];
};
typedef struct PACKET packet_t;
struct FRAME {
bool bArrived;
packet_t packet;
};
typedef struct FRAME frame_t;
/* helper functions */
void clear_frame(frame_t *frame);
void *get_in_addr(struct sockaddr *sa);
/* setup functions */
int setup_server(void);
int setup_client(const char *hostname);
/* file functions */
int record_file(void);
int send_file(int sockfd, struct sockaddr_storage *client, const char *filename, frame_t *packet);
int recv_file(int sockfd, struct sockaddr_storage *server, const char *filename, frame_t *packet);
int play_file(const char *filename);
/* main() - entry point for application
*/
int main(int argc, char *argv[])
{
WSADATA wsaData;
int sockfd;
struct sockaddr_storage client, addr;
frame_t frame;
if(argc > 2) {
fprintf(stderr, "Usage: %s [address]\n", argv[0]);
return 0;
}
memset(&client, 0, sizeof(client));
memset(&addr, 0, sizeof(addr));
clear_frame(&frame);
WSAStartup(0x0202, &wsaData);
if(argc == 1) {
sockfd = setup_server();
if(recv_file(sockfd, &client, "test.wav", &frame))
goto error;
printf("IP : %s\nPORT : %s\n", inet_ntoa(((struct sockaddr_in *)&client)->sin_addr), MYPORT);
if(play_file("tmp.wav"))
goto error;
if(remove("tmp.wav"))
goto error;
} else {
sockfd = setup_client(argv[1]);
puts("Press any key to record message...");
getch();
if(record_file() != 0)
goto error;
printf("IP : %s\nPORT : %s\n", inet_ntoa(((struct sockaddr_in *)&addr)->sin_addr), MYPORT);
if(send_file(sockfd, &addr, "tmp.wav", &frame) != 0)
goto error;
if(remove("tmp.wav") != 0)
goto error;
}
if(sockfd != 0)
closesocket(sockfd);
WSACleanup();
return 0;
error:
if(sockfd != 0)
closesocket(sockfd);
WSACleanup();
return 1;
}
void clear_frame(frame_t *frame)
{
frame_t ftmp;
memset(&ftmp, 0, sizeof(ftmp));
/* memset(&ftmp.packet, 0, sizeof(ftmp.packet)); */
}
void *get_in_addr(struct sockaddr *sa)
{
if(sa->sa_family == AF_INET)
return &(((struct sockaddr_in*)sa)->sin_addr);
return &(((struct sockaddr_in6*)sa)->sin6_addr);
}
int setup_server(void)
{
struct addrinfo hints, *servinfo, *p;
int sockfd;
int rv;
printf("*****************************\n"
"* Tiny VOIP Application *\n"
"* By 5n4k3 *\n"
"*****************************\n\n");
memset(&hints, 0, sizeof(hints));
hints.ai_family = AF_INET;
hints.ai_socktype = SOCK_DGRAM;
hints.ai_flags = AI_PASSIVE;
if((rv = getaddrinfo(NULL, MYPORT, &hints, &servinfo)) != 0) {
fprintf(stderr, "getaddrinfo: %s\n", gai_strerror(rv));
return 1;
}
/* loop through all the results and bind to the first it can */
for(p = servinfo; p != NULL; p = p->ai_next) {
if((sockfd = socket(p->ai_family, p->ai_socktype,
p->ai_protocol)) == -1) {
perror("listener: socket()");
continue;
}
if(bind(sockfd, p->ai_addr, p->ai_addrlen) == -1) {
close(sockfd);
perror("listener: bind()");
continue;
}
break;
}
if(p == NULL) {
fprintf(stderr, "listener: failed to bind socket\n");
return 2;
}
freeaddrinfo(servinfo);
printf("listener: waiting to recvfrom...\n");
return sockfd;
}
int setup_client(const char *hostname)
{
struct addrinfo hints, *servinfo, *p;
int sockfd;
int rv;
printf("*****************************\n"
"* Tiny VOIP Application *\n"
"* By 5n4k3 *\n"
"*****************************\n\n");
memset(&hints, 0, sizeof(hints));
hints.ai_family = AF_INET;
hints.ai_socktype = SOCK_DGRAM;
if((rv = getaddrinfo(hostname, MYPORT, &hints, &servinfo)) != 0) {
fprintf(stderr, "getaddrinfo: %s\n", gai_strerror(rv));
return 1;
}
/* loop through all the results and make a socket */
for(p = servinfo; p != NULL; p = p->ai_next) {
if((sockfd = socket(p->ai_family, p->ai_socktype,
p->ai_protocol)) == -1) {
perror("talker: socket()");
continue;
}
if(connect(sockfd, p->ai_addr, p->ai_addrlen) == -1) {
close(sockfd);
perror("client: connect()");
continue;
}
break;
}
if(p == NULL) {
fprintf(stderr, "talker: failed to create socket.\n");
return 2;
}
freeaddrinfo(servinfo);
puts("client: socket created.");
return sockfd;
}
int record_file(void)
{
char mci_command[100];
char retstr[300];
int mci_error;
/* open wav type alias */
sprintf(mci_command, "open new type waveaudio alias %s", ALIAS);
mci_error = mciSendString(mci_command, retstr, sizeof(retstr), NULL);
/* set the time format */
sprintf(mci_command, "set %s time format ms", ALIAS);
mci_error = mciSendString(mci_command, retstr, sizeof(retstr), NULL);
sprintf(mci_command, "record %s notify", ALIAS);
mci_error = mciSendString(mci_command, retstr, sizeof(retstr), NULL);
printf("Now on air, press a key to stop.\n");
getch();
sprintf(mci_command, "stop %s", ALIAS);
mci_error = mciSendString(mci_command, retstr, sizeof(retstr), NULL);
sprintf(mci_command, "save %s %s", ALIAS, "tmp.wav");
mci_error = mciSendString(mci_command, retstr, sizeof(retstr), NULL);
sprintf(mci_command, "close %s", ALIAS);
mci_error = mciSendString(mci_command, retstr, sizeof(retstr), NULL);
printf("Recording stopped.\nPress a key to quit.\n");
getch();
return mci_error;
}
int send_file(int sockfd, struct sockaddr_storage *client, const char *filename, frame_t *frame)
{
FILE *file;
char *buf;
char cwd[256];
int client_len;
int total_bytes;
int bytes;
if(getcwd(cwd, sizeof(cwd)) == NULL) {
fprintf(stderr, "Error: Cannot get current working directory.\n");
return -2;
}
strncat(cwd, "\\", sizeof(cwd));
strncat(cwd, filename, sizeof(cwd));
if((file = fopen(cwd, "rb")) == NULL) {
fprintf(stderr, "Error: Cannot read input file.\n");
close(sockfd);
WSACleanup();
exit(1);
}
bytes = 0;
total_bytes = 0;
frame->bArrived = false;
while(frame->bArrived == 0) {
bytes = fread(frame->packet.data, 1, MAXDATA, file);
if(bytes > 0) {
total_bytes += bytes;
if(bytes == MAXDATA) {
frame->bArrived = true;
}
}
if(bytes == 0)
break;
}
buf = malloc(sizeof(frame_t));
if(!buf) {
fprintf(stderr, "Out of memory.\n");
fclose(file);
close(sockfd);
WSACleanup();
exit(1);
}
memcpy(buf, frame, sizeof(frame_t));
client_len = sizeof(struct sockaddr_storage);
if(sendto(sockfd, buf, sizeof(frame_t), 0, (struct sockaddr *)client, client_len) == -1) {
fprintf(stderr, "Couldn't send all of the data.\n");
} else {
printf("Sent %d bytes of data.\n", total_bytes);
}
free(buf);
fclose(file);
return 0;
}
int recv_file(int sockfd, struct sockaddr_storage *server, const char *filename, frame_t *frame)
{
struct sockaddr_in addr;
FILE *file;
char cwd[256];
int addrlen;
int total_bytes;
int bytes;
if(getcwd(cwd, sizeof(cwd)) == NULL) {
fprintf(stderr, "Error: Cannot get current working directory.\n");
return -2;
}
strncat(cwd, "\\", sizeof(cwd));
strncat(cwd, filename, sizeof(cwd));
if((file = fopen(cwd, "wb")) == NULL) {
fprintf(stderr, "Error: Cannot open file for writing.\n");
return -1;
}
bytes = 0;
total_bytes = 0;
addr = *((struct sockaddr_in *)server);
addrlen = sizeof(addr);
while((bytes = recvfrom(sockfd, frame->packet.data, MAXDATA, 0, (struct sockaddr*)&addr,
&addrlen)) != 0) {
if(fwrite(frame->packet.data, 1, bytes, file) == -1) {
fprintf(stderr, "Couldn't write all of the data.\n");
break;
}
total_bytes += bytes;
}
fclose(file);
if(bytes == 0) {
printf("Received %d bytes of data.\n", total_bytes);
frame->bArrived = 1;
}
return 0;
}
int play_file(const char *filename)
{
if(PlaySound(filename, NULL, SND_FILENAME))
return 1;
return 0;
}