我正在用 C 语言编写 IRC 客户端。在连接服务器时遇到了一些问题。当我运行程序时,我得到以下信息:
输出
Set Fully Qualified host Domain Name(human readable): ::automaticaly provided::
Set the port number of the server You want to connect to: ::automaticaly provided::
Destination server IP: 88.190.23.245
Socket descriptor: 3
Connection has been successfully established
Peer's IP is: 88.190.23.245
Peer's port is: 5190
:irc2.gbatemp.net NOTICE AUTH :*** Looking up your hostname...
:irc2.gbatemp.net NOTICE AUTH :*** Found your hostname (cached)
Type Your nick name: ::automaticaly provided::
Type Your user name: ::automaticaly provided::
(10-20 seconds break here and than what follows down here)
ERROR :Closing Link: thisIsMyNickNameXXXa[85.221.165.54] (Ping timeout)
temp.net NOTICE AUTH :*** Found your hostname (cached)
ERROR :Closing Link: thisIsMyNickNameXXXa[85.221.165.54] (Ping timeout)
temp.net NOTICE AUTH :*** Found your hostname (cached)
ERROR :Closing Link: thisIsMyNickNameXXXa[85.221.165.54] (Ping timeout)
temp.net NOTICE AUTH :*** Found your hostname (cached)
.......
.............
...................
==================================================== ===========
::automaticaly provided::
- 表示现在由程序传递,所以我不必多次输入。
顺便提一句。正在连接到 irc.gbatemp.net:5190(就我而言,不需要密码)
在提供必要的数据后 10-20 秒发生中断(我在 OUTPUT 部分指定),然后 ERROR temp.net 部分跟随广告无限(我用点标记)
所以问题的主要部分是我应该如何以及何时发送 PONG 消息以响应 PING ?我做了我的研究,但仍然无法做到。为什么我在 STDOUT 中看不到 PING 消息?
我正在提供负责输出和 PINGPONG 部分的代码(已注释)(目前的主要问题是 PING PONG,因为错误状态为 PING TIMEOUT)可能是 while(1) 循环还不完美,但我想它是另一个主题的主题)代码如下:
int readReady=0;
int writeReady=0;
pid_t pID;
char buf[1024]; //I/O buffer (?)
pid_t sID;
char *NICK = "NICK thisIsMyNickNameXXXa\n\r";
char *USER = "USER tomaazrxtc 8 * :nameandsurname";
char ping[512];
char *change;
pID=fork();
if(pID < 0){
//failed to execute fork()
perror("Error while forking");
getchar();getchar();
exit(1);
}
if(pID > 0){
exit(0);
}
//child down here
//setting new session
sID = setsid();
if(sID < 0){
perror("Error while setting new session");
getchar();getchar();
exit(1);
}
//---------receiving NOTICE AUTH :*** part-------------------------------
if(recv(sockfd, buf, 1024,0)>0){
printf(buf);
}
else{
perror("Error while receiving data");
}
//---------providing and sending NICK and USERNAME-----------------------
printf("Type Your nick name: \n");
//scanf(nickname); pamietaj zeby zapewnic podawanie tylko nicku, a format handler zrobic osobno
send(sockfd, NICK, strlen(NICK), 0);
printf("Type Your user name: \n");
//scanf(username); pamietaj zeby zapewnic podawanie tylko nicku, a format handler zrobic osobno
send(sockfd, USER, strlen(USER), 0);
//--------Shoudnt I receive PING message just here ?????-----------------
recv(sockfd, buf, strlen(buf), 0);
printf(buf);
//--------PONG'ing function which I havent tested yet since i cant see PING message----
recv(sockfd, ping, 512,0);
if(strstr(ping, "PING")){
change = strstr(ping, "PING");
strncpy(change, "PONG", 4);
send(sockfd, ping, 512, 0);
}
//-------------------------------------------------------------------------
while(1){
//sleep(1);
if((readReady = readReadiness(sockfd))==0){ //nothing to recv
if((writeReady = writeReadiness(sockfd))>0){ //sending is possible
scanf(buf);
send(sockfd, buf, strlen(buf), 0);
continue;
}
else
continue; //if there s no data to read and cant send (is it even possible?)
}
else{ //if there s some data to recv() on the socket buffer
recv(sockfd, buf, strlen(buf), 0);
printf(buf);
continue;
}
}
//--------------------------------------------------------------------------
行。以后我会把这个问题留给其他人并提供答案。这很琐碎。
我刚刚在 USER 变量的末尾添加了 \n\r (就像在 NICK 字符串中一样)。像魅力一样连接!
终于 : ))