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/
usr/
src/
courier-0.66.1/
courier/
libs/
- drwxrwxrwx
|
Viewing file:  lcrewrite.c (2.42 KB) -rw-rw-rw-Select action/file-type:  ( +) |  ( +) |  ( +) | Code ( +) | Session ( +) |  ( +) | SDB ( +) |  ( +) |  ( +) |  ( +) |  ( +) |  ( +) |
/*
** Copyright 1998 - 2002 Double Precision, Inc.
** See COPYING for distribution information.
*/
#include "courier.h"
#include "rw.h"
#include "rfc822.h"
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
/*
** Address rewriting rules.
*/
/* Tokenize text for RFC822 parsing */
struct rfc822t *rw_rewrite_tokenize(const char *address)
{
struct rfc822t *tokens=rfc822t_alloc_new(address, NULL, NULL);
int i;
if (!tokens) clog_msg_errno();
for (i=1; i<tokens->ntokens; i++)
tokens->tokens[i-1].next=tokens->tokens+i;
return (tokens);
}
/* Call a transport module's rewrite function */
void rw_rewrite_module(struct rw_transport *module,
struct rw_info *rwi, void (*func)(struct rw_info *))
{
if (!module || !module->rw_ptr)
(*rwi->err_func)(450, "Internal failure.", rwi);
else if (module->rw_ptr->rewrite_del)
(*module->rw_ptr->rewrite)(rwi, func);
else
(*rwi->err_func)(550, "Invalid address.", rwi);
}
int rw_syntaxchk(struct rfc822token *t)
{
int cnt;
/*
** The following tokens: ! @ % : . may NOT:
**
** a) appear next to each other, and b) appear at the beginning or
** the end of the address.
**
** EXCEPT @ can start an address: (arcane @relay:foo@bar notation).
*/
if (!t) return (0); /* <> envelope sender ok */
cnt=1;
if (t->token == '@') t=t->next;
while (t)
{
switch (t->token) {
case '<':
case '>':
case ';':
case '(':
case ')':
return (-1); /* These cannot appear anywhere */
case '!':
case '@':
case '%':
case ':':
case '.':
if (++cnt > 1) return (-1);
break;
case 0:
case '"':
{
int i;
for (i=0; i<t->len; i++)
{
unsigned char c=t->ptr[i];
if (isspace((int)c) || c < ' ')
return (-1);
}
}
default:
cnt=0;
break;
}
t=t->next;
}
if (cnt) return (-1);
return (0);
}
/* Common rewrite tail function to convert RFC822 tokens back into
** a text string.
*/
void rw_rewrite_print(struct rw_info *info)
{
char *p=rfc822_gettok(info->ptr);
if (!p) clog_msg_errno();
( (struct rw_info_rewrite *)info->udata)->buf=p;
}
void rw_rewrite_chksyn_print(struct rw_info *info)
{
if (rw_syntaxchk(info->ptr))
{
static const char errmsg[]="Syntax error: ";
char *addr=rfc822_gettok(info->ptr);
char *buf;
if (!addr) clog_msg_errno();
buf=courier_malloc(strlen(addr)+sizeof(errmsg));
strcat(strcpy(buf, errmsg), addr);
free(addr);
(*info->err_func)(553, buf, info);
free(buf);
}
else
rw_rewrite_print(info);
}
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