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/*
* ========================================================================
* Copyright 2013-2021 Eduardo Chappa
* Copyright 2006-2007 University of Washington
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* ========================================================================
*/
/*
* * * * * * * * * RFC 2369 support routines * * * * * * * *
*/
#include "../pith/headers.h"
#include "../pith/maillist.h"
#include "../pith/state.h"
#include "../pith/url.h"
/*
* Internal prototypes
*/
int rfc2369_parse(char *, RFC2369_S *);
/*
* * NOTE * These have to remain in sync with the MLCMD_* macros
* in maillist.h. Sorry.
*/
static RFC2369FIELD_S rfc2369_fields[] = {
{"List-Help",
"get information about the list and instructions on how to join",
"seek help"},
{"List-Unsubscribe",
"remove yourself from the list (Unsubscribe)",
"UNsubscribe"},
{"List-Subscribe",
"add yourself to the list (Subscribe)",
"Subscribe"},
{"List-Post",
"send a message to the entire list (Post)",
"post a message"},
{"List-Owner",
"send a message to the list owner",
"contact the list owner"},
{"List-Archive",
"view archive of messages sent to the list",
"view the archive"}
};
char **
rfc2369_hdrs(char **hdrs)
{
int i;
for(i = 0; i < MLCMD_COUNT; i++)
hdrs[i] = rfc2369_fields[i].name;
hdrs[i] = NULL;
return(hdrs);
}
int
rfc2369_parse_fields(char *h, RFC2369_S *data)
{
char *ep, *nhp, *tp;
int i, rv = FALSE;
for(i = 0; i < MLCMD_COUNT; i++)
data[i].field = rfc2369_fields[i];
for(nhp = h; h; h = nhp){
/* coerce h to start of field */
for(ep = h;;)
if((tp = strpbrk(ep, "\015\012")) != NULL){
if(strindex(" \t", *((ep = tp) + 2))){
*ep++ = ' '; /* flatten continuation */
*ep++ = ' ';
for(; *ep; ep++) /* advance past whitespace */
if(*ep == '\t')
*ep = ' ';
else if(*ep != ' ')
break;
}
else{
*ep = '\0'; /* tie off header data */
nhp = ep + 2; /* start of next header */
break;
}
}
else{
while(*ep) /* find the end of this line */
ep++;
nhp = NULL; /* no more header fields */
break;
}
/* if length is within reason, see if we're interested */
if(ep - h < MLCMD_REASON && rfc2369_parse(h, data))
rv = TRUE;
}
return(rv);
}
int
rfc2369_parse(char *h, RFC2369_S *data)
{
int l, ifield, idata = 0;
char *p, *p1, *url, *comment;
/* look for interesting name's */
for(ifield = 0; ifield < MLCMD_COUNT; ifield++)
if(!struncmp(h, rfc2369_fields[ifield].name,
l = strlen(rfc2369_fields[ifield].name))
&& *(h += l) == ':'){
/* unwrap any transport encodings */
if((p = (char *) rfc1522_decode_to_utf8((unsigned char *) tmp_20k_buf,
SIZEOF_20KBUF, ++h)) == tmp_20k_buf)
strcpy(h, p); /* assumption #383: decoding shrinks */
url = comment = NULL;
while(*h){
while(*h == ' ')
h++;
switch(*h){
case '<' : /* URL */
if((p = strindex(h, '>')) != NULL){
url = ++h; /* remember where it starts */
*p = '\0'; /* tie it off */
h = p + 1; /* advance h */
for(p = p1 = url; (*p1 = *p) != '\0'; p++)
if(*p1 != ' ')
p1++; /* remove whitespace ala RFC */
}
else
*h = '\0'; /* tie off junk */
break;
case '(' : /* Comment */
comment = rfc822_skip_comment(&h, LONGT);
break;
case 'N' : /* special case? */
case 'n' :
if(ifield == MLCMD_POST
&& (*(h+1) == 'O' || *(h+1) == 'o')
&& (!*(h+2) || *(h+2) == ' ')){
; /* yup! */
url = h;
*(h + 2) = '\0';
h += 3;
break;
}
default :
removing_trailing_white_space(h);
if(!url
&& (url = rfc1738_scan(h, &l))
&& url == h && l == strlen(h)){
removing_trailing_white_space(h);
data[ifield].data[idata].value = url;
}
else
data[ifield].data[idata].error = h;
return(1); /* return junk */
}
while(*h == ' ')
h++;
switch(*h){
case ',' :
h++;
case '\0':
if(url || (comment && *comment)){
data[ifield].data[idata].value = url;
data[ifield].data[idata].comment = comment;
url = comment = NULL;
}
if(++idata == MLCMD_MAXDATA)
*h = '\0';
default :
break;
}
}
}
return(idata);
}
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