public.h

一个简单的linux下的网络传输程序

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

#define DEFAULT_PORT   8008
#define MAX_PATH_LENTH 256
#define MAX_DATA_SIZE  8192  //Max Value 65535-8-SERVER_HEADER_SIZE

typedef struct _ClientInfo{
	char szLogo[6];
	unsigned short int uSequence;
	char szreserved[24];
	char szClient[64];
	char szPasswd[64];
	char szCommand[32];
	struct _ClientInfo* pNext;
}CLIENT_INFO,*PCLIENT_INFO;

struct ServerHeader{
	char szLogo[6];
	unsigned long int uSequence; //The Sequence of Pakage;
	unsigned long int uFileCount; //The Count of File;
	char szFileName[MAX_PATH_LENTH];
	unsigned long int uFileSize;
	long int nMode;
};
#define SERVER_HEADER_SIZE sizeof(struct ServerHeader)

struct ServerData{
	struct ServerHeader Header;
	char szData[MAX_DATA_SIZE];
};

int IsNumber(char* pBuf)
{
	int i,nLen;
	nLen = strlen(pBuf);
	for(i=0;i<nLen;i++)
	{
		if(pBuf[i] < '0' || pBuf[i] > '9')
			return 1;
	}
	return 0;
}

int IsIPAddr(char* pIPAddr)
{
	int nCount = 0;
	char* pPos,*pPos1;
	
	if(strlen(pIPAddr) < 7)
		return 1;

	pPos = pIPAddr;
	while((pPos1 = strchr(pPos,'.')) != NULL)
	{
		nCount++;
		pPos = pPos1+1;
	}
	if(nCount != 3)
		return 1;
	
	if(-1 == inet_addr(pIPAddr))
		return 1;
	return 0;
}