我使用多线程实现了基本的udp客户端服务器应用程序，但实际上线程没有调用...任何正文都可以帮助我..
class uu_FrameWorkSocket
{
protected:
struct sockaddr_in ModuleMySocketAddress;
uu_int32 ModuleHostPortK;
uu_char* ModuleHostNameK;
uu_int32 ModuleSockFlagK;
uu_int32* ModuleSockOptValueP;
public:
uu_void uu_ModuleInitSocket(uu_int32,uu_int32);
uu_void uu_ModuleSetSocketOptions(uu_int32);
uu_void SetHostName(uu_char* );
uu_void SetPortNumber(uu_int32 );
uu_void uu_ModuleCloseSocket(uu_int32 );
uu_FrameWorkSocket(){
ModuleHostPortK = 3232;
ModuleHostNameK = (uu_char*) malloc(20);
strcpy(ModuleHostNameK,"127.0.0.1");
}
};
uu_void uu_FrameWorkSocket :: SetHostName(uu_char *psHostName){
ModuleHostNameK = (uu_char*) malloc(20);
strcpy(ModuleHostNameK,psHostName);
}
uu_void uu_FrameWorkSocket :: SetPortNumber(uu_int32 iPortNumber){
ModuleHostPortK=iPortNumber;
}
uu_void uu_FrameWorkSocket :: uu_ModuleCloseSocket(uu_int32 iSocketfd){
close(iSocketfd);
}
uu_void uu_FrameWorkSocket :: uu_ModuleInitSocket(uu_int32 iTypeFamily,uu_int32 iTypeProtocol){
if(iTypeFamily == UU_PROJECT_MODULE_IPV4)
{
if(iTypeProtocol == UU_PROJECT_MODULE_TCP)
ModuleSockFlagK = socket(AF_INET, SOCK_STREAM, 0);
else
ModuleSockFlagK = socket(AF_INET, SOCK_DGRAM, 0);
}
else
{
if(iTypeProtocol == UU_PROJECT_MODULE_TCP)
ModuleSockFlagK = socket(AF_INET6, SOCK_STREAM, 0);
else
ModuleSockFlagK = socket(AF_INET6, SOCK_DGRAM, 0);
}
if (ModuleSockFlagK == -1){
printf("Error while initializing socket.\n");
exit(0);
}
}
uu_void uu_FrameWorkSocket :: uu_ModuleSetSocketOptions(uu_int32 iTypeFamily){
ModuleSockOptValueP = (uu_int32*)malloc(sizeof(uu_int32));
*ModuleSockOptValueP = 1;
if( (setsockopt(ModuleSockFlagK, SOL_SOCKET, SO_REUSEADDR, (uu_char*)ModuleSockOptValueP, sizeof(uu_int32)) == -1 ) ){
printf("Error while setting socket options.\n");
free(ModuleSockOptValueP);
exit(0);
}
free(ModuleSockOptValueP);
if(iTypeFamily == UU_PROJECT_MODULE_IPV4)
ModuleMySocketAddress.sin_family = AF_INET ;
else
ModuleMySocketAddress.sin_family = AF_INET6 ;
ModuleMySocketAddress.sin_port = htons(ModuleHostPortK);
memset(&(ModuleMySocketAddress.sin_zero), 0, 8);
ModuleMySocketAddress.sin_addr.s_addr = inet_addr(ModuleHostNameK);
}
class uu_ProjectModuleUdp : public uu_FrameWorkSocket
{
protected:
socklen_t ModuleMySockAddrLength;
uu_int32* ModuleSockConnFlag;
sockaddr_in ModuleIpSockAddr;
pthread_t ModuleThreadId;
public:
struct Request{
sockaddr_in ModuleClientSockAddr;
uu_int32 ModuleClientSocket;
};
uu_void ModuleUdpBind(){
if( bind( ModuleSockFlagK, (sockaddr*)&ModuleMySocketAddress, sizeof(ModuleMySocketAddress)) == -1 ){
fprintf(stderr,"Error while binding to socket:%d\n",errno);
exit(0);
}
}
uu_void ModuleUdpAccept(){
ModuleMySockAddrLength = sizeof(sockaddr_in);
uu_char Msg[100];
uu_int32 N;
struct Request ModuleRequestStructure;
while(true){
if(( N= recvfrom( ModuleSockFlagK,Msg,100,0, (sockaddr*)&ModuleIpSockAddr, &ModuleMySockAddrLength))!= -1){
printf("==\nReceived connection from %s\n",inet_ntoa(ModuleIpSockAddr.sin_addr));
printf("Received message: %s \n",Msg);
sendto( ModuleSockFlagK,Msg,N,0, (sockaddr*)&ModuleIpSockAddr, ModuleMySockAddrLength);
ModuleRequestStructure.ModuleClientSockAddr=ModuleIpSockAddr;
ModuleRequestStructure.ModuleClientSocket=ModuleSockFlagK;
pthread_create(&ModuleThreadId,0,&ModuleUdpSocketHandler, (uu_void*)&ModuleRequestStructure );
pthread_detach(ModuleThreadId);
}
else{
fprintf(stderr, "Error accepting... %d\n", errno);
}
}
}
static uu_void* ModuleUdpSocketHandler(uu_void* ModuleRequestStruct){
Request *ModuleRequest=(Request *)ModuleRequestStruct;
uu_int32 iClientSocket=ModuleRequest->ModuleClientSocket;
sockaddr_in ClientSockaddr=ModuleRequest->ModuleClientSockAddr;
socklen_t ModuleMySockAddrLength = sizeof(sockaddr_in);
uu_char acBuffer[1024];
uu_int32 iBufferLen = 1024;
uu_int32 iByteCount;
while(true){
memset(acBuffer, '\0', iBufferLen);
if((iByteCount = recvfrom(iClientSocket,acBuffer,iBufferLen,0,(sockaddr*)&ClientSockaddr,&ModuleMySockAddrLength))== -1){
fprintf(stderr, "Error receiving data %d\n", errno);
exit(0);
}
printf("Received bytes: %d\nReceived string: %s \n", iByteCount, acBuffer);
if((iByteCount = sendto(iClientSocket, acBuffer, strlen(acBuffer), 0,(sockaddr*)&ClientSockaddr,ModuleMySockAddrLength))== -1){
fprintf(stderr, "Error sending data %d\n", errno);
exit(0);
}
printf("Sent bytes %d\n", iByteCount);
}
}
uu_void ModuleUdpAfterConn(){
uu_char acBuffer[1024];
uu_int32 iByteCount;
uu_int32 iBufferLen=0;
ModuleMySockAddrLength = sizeof(sockaddr_in);
iBufferLen = 1024;
while(true){
memset(acBuffer, '\0', iBufferLen);
printf("Enter some text to send to the server (press enter):\n");
fgets(acBuffer, 1024, stdin);
acBuffer[strlen(acBuffer)-1]='\0';
if( (iByteCount=sendto(ModuleSockFlagK, acBuffer, strlen(acBuffer),0,(sockaddr*)&ModuleMySocketAddress,ModuleMySockAddrLength))== -1){
fprintf(stderr, "Error sending data %d\n", errno);
exit(0);
}
printf("Sent bytes %d\n", iByteCount);
if((iByteCount = recvfrom(ModuleSockFlagK, acBuffer, iBufferLen, 0,NULL,NULL))== -1){
fprintf(stderr, "Error receiving data %d\n", errno);
exit(0);
}
printf("Recieved bytes: %d\nReceived string: \"%s\"\n", iByteCount, acBuffer);
}
close(ModuleSockFlagK);
}
};
int main(int argc, char **argv){
if(strcmp(argv[1],"udp")==0){
if(strcmp(argv[2],"server")==0){
printf("This is UDP Server");
uu_ProjectModuleUdp server;
server.SetPortNumber(6745);
server.uu_ModuleInitSocket(UU_PROJECT_MODULE_IPV4,UU_PROJECT_MODULE_UDP);
server.uu_ModuleSetSocketOptions(UU_PROJECT_MODULE_IPV4);
server.ModuleUdpBind();
server.ModuleUdpAccept();
}
else if(strcmp(argv[2],"client")==0){
printf("This is UDP Client");
uu_ProjectModuleUdp client;
client.SetPortNumber(6745);
client.uu_ModuleInitSocket(UU_PROJECT_MODULE_IPV4,UU_PROJECT_MODULE_UDP);
client.uu_ModuleSetSocketOptions(UU_PROJECT_MODULE_IPV4);
client.ModuleUdpAfterConn();
}
}
else
printf("Wrong/Missing Arguments\n");
return 0;
}
这里针对每个客户端必须调用一个线程，但它没有调用..
答案 0 :(得分：0)
可能发生的事情是你的线程崩溃了。当您尝试访问ModuleRequest指针时，原因是未定义的行为，因为它指向ModuleUdpAccept内的局部变量。
当ModuleUdpAccept返回时，该指针不再指向有效内存，并且您得到未定义的行为，这可能（或可能不会）导致线程崩溃。