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#include <sys/time.h>
#include <string.h>
#include <stdlib.h>
#include <stdio.h>
#include <netinet/in.h>
#include <netdb.h>
#include <sys/socket.h>
#include <arpa/inet.h>
#include <unistd.h>
#include <sys/select.h>
#include <sys/un.h>
#include "irc.h"
//#define DEBUG "epoch" //nick or channel to send debug info to.
#define CHUNK 4096
#define SILLYLIMIT 1024
/* how this works:
if server == |/program then open a socketpair and fork and exec program
else try serv as IPv6, as IPv4, resolve as IPv6, resolve as IPv4
connect to that.
*/
int serverConnect(char *serv,char *port) {
int fd=-1;
int s[2];
int pid;
int try_ipv4;
char *name[3];
char buf[SILLYLIMIT];
struct addrinfo hints, *servinfo, *p=0;
struct hostent *he;
struct sockaddr_in saddr;
struct sockaddr_in6 saddr6;
printf("libirc: serverConnect: %s %s\n",serv,port);
if(!serv || !port) return -1;
if(*serv == '|') {
name[0]=serv+1;
name[1]=port;
name[2]=0;
socketpair(PF_LOCAL,SOCK_STREAM,0,s);
if(!(pid=fork())) {
dup2(s[1],fileno(stdin));
dup2(s[1],fileno(stdout));
execv(name[0],name);
}
if(pid == -1) return -1;
return s[0];
}
memset(&hints,0,sizeof hints);
hints.ai_socktype=SOCK_STREAM;
hints.ai_protocol=IPPROTO_TCP;
for(try_ipv4=0;try_ipv4 < 2;try_ipv4++) {
hints.ai_family=try_ipv4?AF_INET:AF_INET6;
if(fd != -1) close(fd);
if((fd=socket(hints.ai_family,SOCK_STREAM,IPPROTO_TCP)) < 0) return -1;
if(!(he=gethostbyname2(
try_ipv4
?inet_aton(serv,&(saddr.sin_addr))
?inet_ntoa(saddr.sin_addr)
:serv
:inet_pton(AF_INET6,serv,&(saddr6.sin6_addr))
?inet_ntop(AF_INET6,&(saddr6.sin6_addr),buf,SILLYLIMIT)
:serv
,hints.ai_family))) continue;
for(;*(he->h_addr_list);(he->h_addr_list)++) {
inet_ntop(hints.ai_family,*(he->h_addr_list),buf,SILLYLIMIT);
if(!getaddrinfo(buf,port,&hints,&servinfo))
for(p=servinfo;p;p=p->ai_next)
if(connect(fd,p->ai_addr, p->ai_addrlen) < 0) continue; else return fd;
}
}
printf("I tried as hard as I could and couldn't connect to %s:%s\n",serv,port);
return -1;
}
int fdlen(int *fds) {
int i;
for(i=0;fds[i] != -1;i++);
return i+1;
}
int runem(int *fds,void (*line_handler)(),void (*extra_handler)()) {
int j;
int fdl=fdlen(fds);
fd_set master;
fd_set readfs;
struct timeval timeout;
int fdmax=0,n,i;
char *backlogs[fdl];
char *t,*line=0;
int blsize=CHUNK;
int bllen=0;
char buffers[fdl][CHUNK];//THIS IS *NOT* NULL TERMINATED.
if(fds[0] == -1) return 0;
FD_ZERO(&master);
FD_ZERO(&readfs);
for(i=0;fds[i] != -1;i++) {
FD_SET(fds[i],&master);
backlogs[i]=malloc(CHUNK+1);
memset(backlogs[i],0,CHUNK);
memset(buffers[i],0,CHUNK);
fdmax=fds[i]>fdmax?fds[i]:fdmax;
}
for(;;) {
readfs=master;
timeout.tv_sec=0;
timeout.tv_usec=1000;
if((j=select(fdmax+1,&readfs,0,0,&timeout)) == -1 ) return perror("select"),1;
for(i=0;fds[i] != -1;i++) if(extra_handler) extra_handler(fds[i]);
if(j == 0) continue;//don't bother to loop over them.
for(i=0;fds[i] != -1;i++) {
if(!FD_ISSET(fds[i],&readfs)) continue;
if((n=recv(fds[i],buffers[i],CHUNK,0)) <= 0) return (perror("recv"),2);
buffers[i][n]=0;//deff right.
if(bllen+n >= blsize) {//this is probably off...
blsize+=n;
t=malloc(blsize);
if(!t) exit(253);
memcpy(t,backlogs[i],blsize-n+1);
free(backlogs[i]);
backlogs[i]=t;
}
memcpy(backlogs[i]+bllen,buffers[i],n);
bllen+=n;
while((t=strstr(backlogs[i],"\r\n"))) {
line=backlogs[i];
if(!strncmp(line,"PING",4)) {
line[1]='O';
write(fds[i],line,t-backlogs[i]+2);
} else {
if(!strncmp(line,"ERROR",5)) return 0;
*t=0;
line_handler(fds[i],line);
}
bllen-=((t+2)-backlogs[i]);
if(bllen <= 0) bllen=0;
else memmove(backlogs[i],(t+2),bllen);
}
}
}
return 0;
}
//wrap runem to keep runit around :P
int runit(int fd,void (*line_handler)(),void (*extra_handler)()) {
int fds[2];
fds[0]=fd;
fds[1]=-1;
return runem(fds,line_handler,extra_handler);
}
//not needed?
int ircConnect(char *serv,char *port,char *nick,char *user) {
char sendstr[1024];
int fd;
fd=serverConnect(serv,port);
if(!fd) {
return 0;
}
snprintf(sendstr,sizeof(sendstr)-1,"NICK %s\r\nUSER %s\r\n",nick,user);
write(fd,sendstr,strlen(sendstr));
return fd;
}
//this function mangles the input.
//gotta free the returned pointer but not each pointer in the array.
char **line_cutter(int fd,char *line,struct user *user) {
int i;
char **a=malloc(sizeof(char *) * 256);//heh.
memset(a,0,sizeof(char *) * 256);
if(!user) return 0;
user->nick=0;
user->user=0;
user->host=0;
if(!line) return 0;
if(strchr(line,'\r')) *strchr(line,'\r')=0;
if(strchr(line,'\n')) *strchr(line,'\n')=0;
if(line[0]==':') {
if((user->nick=strchr(line,':'))) {
*(user->nick)=0;
(user->nick)++;
}
}
if(user->nick) {
if((a[0]=strchr((user->nick),' '))) {
*a[0]=0;
a[0]++;
for(i=0;(a[i+1]=strchr(a[i],' '));i++) {
*a[i+1]=0;
a[i+1]++;
if(*a[i+1] == ':') {//we're done.
*a[i+1]=0;
a[i+1]++;
break;
}
}
}
if(((user->user)=strchr((user->nick),'!'))) {
*(user->user)=0;
(user->user)++;
if(((user->host)=strchr((user->user),'@'))) {
*(user->host)=0;
(user->host)++;
}
} else {
user->host=user->nick;
}
}
return a;
}
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