我试图在C语言中创建一个IRC机器人。当机器人试图连接到IRC服务器时,它会进入一个无限循环,在这个循环中它什么也收不到。
我不确定这是因为我加入IRC服务器的过程格式不正确,还是因为我缺少一些应该发送/接收的数据。
#include<stdio.h>
#include<sys/socket.h>
#include<netdb.h>
#include<string.h>
#include<stdlib.h>
#include<time.h>
#define MAXSIZE 4096
void delay(int milliseconds)
{
long pause;
clock_t now;
pause = milliseconds*(CLOCKS_PER_SEC/1000);//set delay using
now = clock();
while( now < pause )
now = clock();
}
int send_data(int sockfd, char message[])
{
send(sockfd, message, strlen(message), 0);
printf("OUT: %s\n", message);
return 1;
}
int recv_data(int sockfd, char *message)
{
int n;
n = recv(sockfd, message, MAXSIZE, 0);
printf("IN: %s\n", message);
return n;
}
int tcp_connect(int *sockfd, char server[], char port[])
{
//declare variables
struct addrinfo hints, *res;
//zero out structures
memset(&hints,0,sizeof(hints));
hints.ai_family = AF_INET;
hints.ai_socktype = SOCK_STREAM;
//query DNS server for IP address and port
getaddrinfo(server,port,&hints,&res);
//create socket for data transmission
*sockfd = socket(res->ai_family,res->ai_socktype,0);
if (*sockfd < 0)
{
printf("failure to create socket\n");
return 0;
}
//connect to server side port using created socket
if (connect(*sockfd, res->ai_addr, res->ai_addrlen)!= 0)
{
printf("failure to connect to port\n");
return 0;
}
freeaddrinfo(res);
return 1;
}
int irc_auth(int sockfd)
{
//create and start clock
clock_t start_t;
start_t = clock();
//seed RNG with clock output
srand(start_t);
//generate necessary variables
char name[15] = "bot";
char user[35] = "USER ";
char nick[20] = "NICK ";
char join[20] = "JOIN #randChat\r\n";
int i,id;
//generate random character for ID tag A-Z
for(i=0; i<5; i++)
{
id = rand() % 91;
if(id < 65)
{
while(id < 65)
{
id = rand() % 91;
}
}
name[strlen(name)] = id;
}
//append return and null to string
strcat(nick,name);
strcat(nick,"\r\n");
//append to finish creating USER IRC command
strcat(user,name);
strcat(user," 8 * :");
strcat(user,name);
strcat(user,"\r\n");
//send data to server
send_data(sockfd,user);
delay(1000);
send_data(sockfd,nick);
delay(1000);
send_data(sockfd,join);
return 1;
}
int main (int argc, char *argv)
{
//variables
int sockfd, n, flag;
char *mesg_in = malloc(sizeof(char) * MAXSIZE);
char *pos;
char nick[30];
char *mesg_out = malloc(sizeof(char) * MAXSIZE);
//connect to port 6667 of irc.freenode.org using tcp
while(flag<1)
{
if(tcp_connect(&sockfd,"irc.freenode.org","6667") == 1)
{
flag = 1;
}
}
//IRC channel authentication
irc_auth(sockfd);
//command loop
while(1)
{
mesg_in[0] = 0;// zero out message
//memset(mesg_in,0,strlen(mesg_in));
n = recv_data(sockfd,mesg_in);// pull message from channel
if (n > 0)// check to see if it recieved a command
{
mesg_in[n] = 0;// set null at the end of recieved data
//respond to ping commands from server
if(strstr(mesg_in,"PING") != NULL)
{
mesg_out[0] = 0;// zero out message
pos = strstr(mesg_in," ")+1;// point to data needed
//append to out bound message
sprintf(mesg_out,"PONG %s\r\n",pos);
//send outbound message
send_data(sockfd,mesg_out);
}
}
}
}
如能提供任何帮助,我们将不胜感激
最佳答案
不管还有什么问题,delay()
就是其中之一。您在此测试程序中的函数将等待两秒,然后同时打印1 2 3
,因为它只考虑从程序启动到当前时刻的运行时间。
#include <stdio.h>
#include <time.h>
void delay(int milliseconds)
{
long pause;
clock_t now;
pause = milliseconds*(CLOCKS_PER_SEC/1000);//set delay using
now = clock();
while( now < pause )
now = clock();
}
int main (void)
{
delay(2000);
printf("1\n");
delay(2000);
printf("2\n");
delay(2000);
printf("3\n");
return 0;
}
此版本每隔两秒打印一次
#include <stdio.h>
#include <time.h>
void delay(clock_t milliseconds)
{
clock_t elapsed, pause, stamp;
stamp = clock();
pause = milliseconds * CLOCKS_PER_SEC / 1000;
while ((elapsed = clock() - stamp) < pause);
}
int main (void)
{
delay(2000);
printf("1\n");
delay(2000);
printf("2\n");
delay(2000);
printf("3\n");
return 0;
}
请注意,在整数运算中,我在除法之前做乘法运算。
关于c - IRC bot故障,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/41368466/