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91 lines
2.2 KiB
91 lines
2.2 KiB
/*
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* Copyright (C) 2007 iptelorg GmbH
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*
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* This file is part of Kamailio, a free SIP server.
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*
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* Kamailio is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version
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*
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* Kamailio is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*
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*/
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/*! \file
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* \brief Parser :: Retry-After: header parser
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*
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* \ingroup parser
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*/
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#include "../comp_defs.h"
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#include "parse_retry_after.h"
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#include "parser_f.h" /* eat_space_end and so on */
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#include "parse_def.h"
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#include "../dprint.h"
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#include "../mem/mem.h"
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/*! \brief Parse the Retry-after header field */
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char* parse_retry_after(char* const buf, const char* const end, unsigned* const after, int* const err)
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{
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char *t;
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int i;
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unsigned val;
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val=0;
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t=buf;
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t=eat_lws_end(t, end);
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if (t>=end) goto error;
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for (i=0; t<end; i++,t++){
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if ((*t >= '0') && (*t <= '9')){
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val=val*10+(*t-'0');
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}else{
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switch(*t){
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/* for now we don't care about retry-after params or comment*/
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case ' ':
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case '\t':
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case ';':
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case '\r':
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case '\n':
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case '(':
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goto found;
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default:
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/* invalid char */
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goto error;
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}
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}
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}
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goto error_nocrlf; /* end reached without encountering cr or lf */
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found:
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if (i>10 || i==0) /* too many or too few digits */
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goto error;
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*after=val;
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/* find the end of header */
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for (; t<end; t++){
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if (*t=='\n'){
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if (((t+1)<end) && (*(t+1)==' ' || *(t+1)=='\t')){
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t++;
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continue; /* line folding ... */
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}
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*err=0;
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return t+1;
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}
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}
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error_nocrlf:
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LOG(L_ERR, "ERROR: parse_retry_after: strange EoHF\n");
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goto error;
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error:
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LOG(L_ERR, "ERROR: parse_retry_after: bad Retry-After header \n");
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*err=1;
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return t;
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}
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