decode_irc.c

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/*
 * decode_irc.c
 *
 * Internet Relay Chat.
 *
 * Copyright (c) 2000 Dug Song <dugsong@monkey.org>
 *
 * $Id: decode_irc.c,v 1.6 2001/03/15 08:33:01 dugsong Exp $
 */
 
#include "config.h"
 
#include <sys/types.h>
 
#include <stdio.h>
#include <string.h>
 
#include "buf.h"
#include "decode.h"
 
int
decode_irc(u_char *buf, int len, u_char *obuf, int olen)
{
    struct buf *line, inbuf, outbuf;
    int i, got_auth;
 
    buf_init(&inbuf, buf, len);
    buf_init(&outbuf, obuf, olen);
    got_auth = 0;
 
    while ((i = buf_index(&inbuf, "\n", 1)) != -1) {
        line = buf_tok(&inbuf, NULL, i);
        buf_skip(&inbuf, 1);
        
        if (i > 0 && line->base[i - 1] == '\r')
            line->end--;
        line->base[line->end] = '\0';
 
        if (buf_cmp(&inbuf, ";", 1) == 0) {
            if ((i = buf_index(line, " ", 1)) < 0)
                continue;
            buf_skip(line, i + 1);
        }
        if (buf_cmp(line, "USER ", 5) == 0 ||
            buf_cmp(line, "NICK ", 5) == 0) {
            buf_rewind(line);
            buf_putf(&outbuf, "%s\n", buf_ptr(line));
        }
        else if (buf_cmp(line, "PASS ", 5) == 0 ||
             buf_cmp(line, "OPER ", 5) == 0) {
            buf_rewind(line);
            buf_putf(&outbuf, "%s\n", buf_ptr(line));
            got_auth = 1;
        }
        else if (buf_cmp(line, "MODE ", 5) == 0 &&
             buf_index(line, " +k ", 4) != -1) {
            buf_rewind(line);
            buf_putf(&outbuf, "%s\n", buf_ptr(line));
            got_auth = 1;
        }
        else if (buf_cmp(line, "JOIN ", 5) == 0) {
            buf_skip(line, 5);
            if ((i = buf_index(line, " ", 1)) < 0)
                continue;
            buf_skip(line, i + 1);
            if (buf_len(line) < 1)
                continue;
            buf_rewind(line);
            buf_putf(&outbuf, "%s\n", buf_ptr(line));
            got_auth = 1;
        }
    }
    buf_end(&outbuf);
    
    return (got_auth ? buf_len(&outbuf) : 0);
}