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/* Simple bnc escrito por infamous [gH] */ /* http://infamous.swipnet.se */ /* [infamous@dalnet] #unixos */ #include <stdio.h> #include <stdlib.h> #include <unistd.h> #include <string.h> #include <signal.h> #include <sys/types.h> #include <sys/socket.h> #include <sys/time.h> #include <sys/wait.h> #include <netinet/in.h> #include <arpa/inet.h> #include <errno.h> #include <netdb.h> extern h_errno; int pt,mu,dp,cu,po; char ps[20]; char vhostname[256] = ""; void child_killer(int s) { wait(NULL); cu--; signal(SIGCHLD, child_killer); } int do_connect(char *hostname, u_short port) { int s; struct hostent *he; struct sockaddr_in sin; s = socket(AF_INET, SOCK_STREAM, 0); if(s < 0) return -2; memset(&sin, 0, sizeof(struct sockaddr_in)); sin.sin_family = AF_INET; sin.sin_addr.s_addr = ( *vhostname ? inet_addr(vhostname) : INADDR_ANY ); if(sin.sin_addr.s_addr == -1 && *vhostname) { he = gethostbyname(vhostname); if(!he) return -1; memcpy(&sin.sin_addr, he->h_addr, he->h_length); } if(bind(s, (struct sockaddr *)&sin, sizeof(struct sockaddr_in)) < 0) { perror("bind"); exit(0); } memset(&sin, 0, sizeof(struct sockaddr_in)); sin.sin_family = AF_INET; sin.sin_port = htons(port); sin.sin_addr.s_addr = inet_addr(hostname); if(sin.sin_addr.s_addr == -1) { he = gethostbyname(hostname); if(!he) return -1; memcpy(&sin.sin_addr, he->h_addr, he->h_length); } if(connect(s, (struct sockaddr *)&sin, sizeof(sin)) < 0) { close(s); return -2; } return s; } server(int s) { int sock_c=-1; int maxfd = s+1; char buffer[1024]; char user[1024]; char nick[100]; char tm[2]; int u,n,p,up; fd_set rset; u_short myport; char *cmd, *server, *port,*nck,*pass,*spass; char myserver[1024]; char spast[30]; strcpy(tm," "); u=1; n=1; p=0; if(po) p=1; while((u+n+p)&&3){ memset(buffer,0,1023); while(tm[0]!='\n'||strlen(buffer)<=0){ memset(tm,0,2); if(read(s,tm,1) <= 0){ close(s); return; } strncat(buffer,tm,1); } if(!strncasecmp(buffer, "USER ", 5)){ strncpy(user, buffer,1023); u=0; } else if(!strncasecmp(buffer, "NICK ", 5)){ strncpy(nick,buffer,100); nck=NULL; strtok(nick," "); nck=strtok(NULL," \n\r"); if(nck) n=0; if(p=1){ sprintf(buffer, ":Fear!roots@ezkracho.com.ar NOTICE %s :You need to say /quote PASS <password>\n",nck); write(s, buffer, strlen(buffer)); } } else if(!strncasecmp(buffer, "PASS ", 5)){ strncpy(myserver,buffer,1023); pass=NULL; strtok(myserver," "); pass=strtok(NULL," \n\r"); if(pass){ if(!strncmp(pass,ps,strlen(ps))) p=0; } } } sprintf(buffer, ":Fear!roots@ezkracho.com.ar NOTICE %s :Level two, lets connect to something real now\n",nck); write(s, buffer, strlen(buffer)); sprintf(buffer, ":Fear!roots@ezkracho.com.ar NOTICE %s :type /quote conn [server] <port> <pass> to connect\n",nck); write(s, buffer, strlen(buffer)); while(1) { FD_ZERO(&rset); FD_SET(s, &rset); if(sock_c >= 0) FD_SET(sock_c, &rset); if(sock_c > s) maxfd = sock_c + 1; else maxfd = s + 1; select(maxfd, &rset, NULL, NULL, NULL); memset(buffer, 0, 1024); if(FD_ISSET(s, &rset)) { if(read(s, buffer, 1023) <= 0) { close(s); close(sock_c); return; } if(sock_c >= 0) { write(sock_c, buffer, strlen(buffer)); } else { cmd = NULL; server = NULL; port = NULL; spass = NULL; up = 0; cmd = strtok(buffer, " "); if(!cmd) continue; if(!strcasecmp(cmd,"vip")){ server = strtok(NULL, " \n\r"); if(!server) continue; strncpy(vhostname,server,256); sprintf(buffer,":Fear!roots@ezkracho.com.ar NOTICE %s :Your Vhost is now %s\n",nck,vhostname); write(s,buffer,strlen(buffer)); continue; } if(strcasecmp(cmd, "conn")) continue; server = strtok(NULL, " \n\r"); if(!server) continue; strncpy(myserver, server,1024); port = strtok(NULL, " \n\r"); if(!port) { myport=dp; } else myport = atoi(port); spass = strtok(NULL, " \n\r"); if(!spass) { up = 0; } else { up = 1; strncpy(spast,spass,29); } sprintf(buffer, ":Fear!roots@ezkracho.com.ar NOTICE %s :Making reality through %s port %i\n",nck,myserver,myport); write(s, buffer, strlen(buffer)); sock_c = do_connect(myserver, myport); if(sock_c < 0) sock_c = -1; if(up){ sprintf(buffer,"PASS %s\n",spast); write(sock_c,buffer,strlen(buffer)); } write(sock_c, user, strlen(user)); sprintf(buffer,"NICK %s\n",nck); write(sock_c, buffer, strlen(buffer)); memset(buffer, 0, 1024); read(sock_c, buffer, 1023); if(strlen(buffer) > 0) { write(s, buffer, strlen(buffer)); } continue; } } if(sock_c >= 0) { if(FD_ISSET(sock_c, &rset)) { memset(buffer, 0, 1024); if(read(sock_c, buffer, 1023) <= 0) { close(s); close(sock_c); return; } write(s, buffer, strlen(buffer)); } } } } loadconf(){ FILE *conf; char *confcmd,*confval; char line[100]; int howfar; if((conf=fopen("bnc.conf","r")) == NULL) { return 1; } howfar=0; while(!feof(conf)){ memset(line,0,100); fgets(line,100,conf); howfar++; if(!strlen(line)) continue; if(strncmp(line,"#",1)){ confcmd=NULL; confval=NULL; confcmd=strtok(line,":"); if(!confcmd) continue; confval=strtok(NULL,"\n"); if(!confval) continue; if(!strcasecmp(confcmd,"pt")) pt=atoi(confval); else if(!strcasecmp(confcmd,"mu")) mu=atoi(confval); else if(!strcasecmp(confcmd,"dp")) dp=atoi(confval); else if(!strcasecmp(confcmd,"ps")){ strcpy(ps,confval); po=1; } else if(!strcasecmp(confcmd,"vh")){ strcpy(vhostname,confval); } else printf("Config line %i rejected-what weirdo told you '%s' goes in my config file?\n",howfar,confcmd); } } fclose(conf); return 0; } int main(int argc, char *argv[]) { int a_sock = 0; int s_sock = 0; struct sockaddr_in sin; int sinlen; int mypid; pt=6861; mu=4; dp=6667; cu=0; po=0; strcpy(ps,"roots-ownz-j00"); printf("\bnc\n"); if(loadconf()) { } printf("* Configuration *\n"); printf(" Daemon port......:%u\n Password.........:%s\n Maxusers.........:%u\n Default port.....:%u\n",pt,ps,mu,dp); s_sock = socket(AF_INET, SOCK_STREAM, 0); if(s_sock < 0) { perror("socket"); exit(0); } memset(&sin, 0, sizeof(struct sockaddr_in)); sin.sin_family = AF_INET; sin.sin_port = htons(pt); sin.sin_addr.s_addr = INADDR_ANY; if(bind(s_sock, (struct sockaddr *)&sin, sizeof(struct sockaddr_in)) < 0) { perror("bind"); exit(0); } if(listen(s_sock, 10) < 0) { perror("listen"); exit(0); } signal(SIGHUP, SIG_IGN); switch(fork()) { case -1: printf("fatal error: unable to fork()"); exit(-1); case 0: setsid(); break; default: exit(0); } close(0); close(1); close(2); signal(SIGCHLD, child_killer); while(1) { sinlen = sizeof(sin); close(a_sock); a_sock = accept(s_sock, (struct sockaddr *)&sin, &sinlen); if(a_sock < 0 && errno == EINTR) continue; if(a_sock < 0) { perror("accept"); continue; } cu++; if((cu>mu) && (mu>0)){ close(a_sock); cu--; continue; } switch(fork()) { case -1: close(a_sock); continue; case 0: close(s_sock); server(a_sock); exit(0); } } }