scc_fun.c

在RedHad9 下实现文字界面的聊天程序。此源码示范了C语言的socket通信编码；RedHad下如何编译c代码。内附说明文档详细说明了socket通信原理和代码解释。

#include "scc.h"

void GetPasswd(char passwd[],char sendline[])
{
	/*int i; 
	char k;
  	i=0;
	printf("Passwd for secure : ");
	while (i<PASSWD) 
  	{ 
		k=getch();
		if (k==0) continue; 
		if (k==cr || k==lf) break;  // CR 回车
    		if(k==rubout && i>0) 
    		{
			i--;
			putch(rubout);
			putch(' ');
			putch(rubout);
			continue;
		} 
    		passwd[i++]=k;
  	} 
	if(strlen(passwd)==0)
	{
		printf("No password for secure! \n");
		return;
	}*/
	printf("Passwd for secure : ");
	fgets(passwd,PASSWD,stdin);
	if(strlen(passwd) <= 0)
	{
		strcpy(passwd,STRPWD);
	}
	bzero(sendline,sizeof(sendline));
	strcat(sendline,"/passwd ");
	strcat(sendline,passwd);
}
	
void LogFile(char logline[],char strLogFile[])
{
	FILE * cfPtr;
	if((cfPtr=fopen(strLogFile,"a+"))==NULL)
	{
		printf("write error");
	}
	else
	{
		fprintf(cfPtr,"%s\n",logline);
		fclose(cfPtr);
	}
}	

int checkParam(int argc,char* argv[],char hostname[],int* isSecure,int* port,char nickname[])
{
	int i;
	bzero(hostname,sizeof(hostname));
	bzero(nickname,sizeof(nickname));

	if(argc>8)
	{
		printf("Usage: %s [-h hostname] [-i] [-p port] [-n nickname]\n",argv[0]);
		exit(1);
	}
	else if(argc>1)
	{		
		for(i=1;i<argc;i++)
		{
			if(!strcmp(argv[i],"-i"))
			{				
				*isSecure=0;
			}
			else if(!strcmp(argv[i],"-h"))
			{
				if(argc>i+1)
				{
					strcpy(hostname,argv[i+1]);
				}
				else
				{
					printf("Usage: %s [-h hostname] [-i] [-p port] [-n nickname]\n",argv[0]);
					return 0;
				}
			}
			else if(!strcmp(argv[i],"-n"))
			{
				if(argc>i+1)
				{
					strcpy(nickname,argv[i+1]);
				}
				else
				{
					printf("Usage: %s [-h hostname] [-i] [-p port] [-n nickname]\n",argv[0]);
					return 0;
				}
			}
			else if(!strcmp(argv[i],"-p"))
			{	
				if(argc>i+1)
				{			
					*port=atoi(argv[i+1]);				
					if(*port<=0)
					{
						*port=0;
					}
				}
				else
				{
					printf("Usage: %s [-h hostname] [-i] [-p port] [-n nickname]\n",argv[0]);
					return 0;
				}
			}
		}	
	}
	
	//set the default value

	if(strlen(hostname)==0)
	{
		//printf("hostname");
		strcpy(hostname,"127.0.0.1");
	}
	if(strlen(nickname)==0)
	{	//	printf("nickname");
		strcpy(nickname,getlogin());
	}
	if(*port==0)
	{	//	printf("port");
		*port=6667;
	}
	return 1;
}