ircd/msgbuf.c

   1 /*
   2  * charybdis - an advanced ircd.
   3  * Copyright (c) 2016 William Pitcock <nenolod@dereferenced.org>.
   4  *
   5  * Permission to use, copy, modify, and/or distribute this software for any
   6  * purpose with or without fee is hereby granted, provided that the above
   7  * copyright notice and this permission notice is present in all copies.
   8  *
   9  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  10  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  11  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  12  * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
  13  * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  14  * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
  15  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  16  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
  17  * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
  18  * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  19  * POSSIBILITY OF SUCH DAMAGE.
  20  */
  21
  22 #include "stdinc.h"
  23 #include "ircd_defs.h"
  24 #include "msgbuf.h"
  25
  26 /*
  27  * parse a message into a MsgBuf.
  28  * returns 0 on success, 1 on error.
  29  */
  30 int
  31 msgbuf_parse(struct MsgBuf *msgbuf, char *line)
  32 {
  33         char *ch;
  34         char *parv[MAXPARA];
  35         size_t n_para;
  36         int i;
  37
  38         /* skip any leading spaces */
  39         for (ch = line; *ch && *ch == ' '; ch++)
  40                 ;
  41
  42         msgbuf_init(msgbuf);
  43
  44         if (*ch == '@')
  45         {
  46                 char *t = ch++;
  47
  48                 ch = strchr(ch, ' ');
  49                 if (ch != NULL)
  50                 {
  51                         while (1)
  52                         {
  53                                 char *next = strchr(t, ';');
  54                                 char *eq = strchr(t, '=');
  55
  56                                 if (next != NULL)
  57                                         *next = '\0';
  58
  59                                 if (eq > next)
  60                                         eq = NULL;
  61
  62                                 if (eq != NULL)
  63                                         *eq = '\0';
  64
  65                                 msgbuf_append_tag(msgbuf, t, eq);
  66
  67                                 if (next != NULL)
  68                                         t = next + 1;
  69                                 else
  70                                         break;
  71                         }
  72                 }
  73         }
  74
  75         /* skip any whitespace between tags and origin */
  76         for (; *ch && *ch == ' '; ch++)
  77                 ;
  78
  79         if (*ch == ':')
  80         {
  81                 ch++;
  82                 msgbuf->origin = ch;
  83
  84                 char *end = strchr(ch, ' ');
  85                 if (end == NULL)
  86                         return 1;
  87
  88                 *end = '\0';
  89
  90                 for (ch = end + 1; *ch && *ch == ' '; ch++)
  91                         ;
  92         }
  93
  94         if (*ch == '\0')
  95                 return 1;
  96
  97         n_para = rb_string_to_array(ch, parv, MAXPARA);
  98         if (n_para == 0)
  99                 return 1;
 100
 101         msgbuf->cmd = parv[0];
 102         for (i = 0; i < n_para; i++)
 103                 msgbuf_append_para(msgbuf, parv[i]);
 104
 105         return 0;
 106 }