174 lines
5.6 KiB
Text
174 lines
5.6 KiB
Text
/*
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*
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***** BEGIN LICENSE BLOCK *****
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Copyright (C) 2020-2022 Olof Hagsand and Rubicon Communications, LLC(Netgate)
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This file is part of CLIXON.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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Alternatively, the contents of this file may be used under the terms of
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the GNU General Public License Version 3 or later (the "GPL"),
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in which case the provisions of the GPL are applicable instead
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of those above. If you wish to allow use of your version of this file only
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under the terms of the GPL, and not to allow others to
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use your version of this file under the terms of Apache License version 2,
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indicate your decision by deleting the provisions above and replace them with
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the notice and other provisions required by the GPL. If you do not delete
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the provisions above, a recipient may use your version of this file under
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the terms of any one of the Apache License version 2 or the GPL.
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***** END LICENSE BLOCK *****
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*
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* HTTP/1.1 parser according to RFC 7230
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*
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The following core rules are included by reference, as defined in
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[RFC5234], Appendix B.1: ALPHA (letters), CR (carriage return), CRLF
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(CR LF), CTL (controls), DIGIT (decimal 0-9), DQUOTE (double quote),
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HEXDIG (hexadecimal 0-9/A-F/a-f), HTAB (horizontal tab), LF (line
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feed), OCTET (any 8-bit sequence of data), SP (space), and VCHAR (any
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visible [USASCII] character).
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*/
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%{
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#include "clixon_config.h"
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#include <stdio.h>
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#include <string.h>
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#include <stdint.h>
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#include <errno.h>
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#include <signal.h>
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#include <openssl/ssl.h>
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#ifdef HAVE_LIBNGHTTP2
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#include <nghttp2/nghttp2.h>
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#endif
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#include "clixon_http1_parse.tab.h" /* generated */
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#include <cligen/cligen.h>
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#include <clixon/clixon.h>
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#include "restconf_lib.h"
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#include "restconf_native.h"
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#include "clixon_http1_parse.h"
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/* Redefine main lex function so that you can send arguments to it: _yy is added to arg list */
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#define YY_DECL int clixon_http1_parselex(void *_hy)
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/* Dont use input function (use user-buffer) */
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#define YY_NO_INPUT
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/* typecast macro */
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#define _HY ((clixon_http1_yacc *)_hy)
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#undef clixon_api_path_parsewrap
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int
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clixon_http1_parsewrap(void)
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{
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return 1;
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}
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%}
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tchar [!#$%&'*+\-\.^_`|~0-9A-Za-z]
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token {tchar}{tchar}*
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pchar [A-Za-z0-9\-\._~!$&'()*+,;=:@]|%[0-9a-fA-F][0-9a-fA-F]
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query [A-Za-z0-9\-\._~!$&'()*+,;=:@?/]|%[0-9a-fA-F][0-9a-fA-F]
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%x REQLINE
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%x REQTARG
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%x REQUERY
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%x REQHTTP
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%x FLDNAME
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%x FLDVALUE
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%x BODYM
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%%
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<REQLINE,REQTARG,REQUERY,REQHTTP,FLDNAME,FLDVALUE><<EOF>> { return X_EOF; }
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<REQLINE>[ ] { BEGIN(REQTARG); return SP; }
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<REQLINE>{token} { clixon_http1_parselval.string = strdup(yytext);
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return TOKEN; }
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<REQLINE>. { clixon_http1_parseerror(_HY, "LEXICAL ERROR\n"); return -1; }
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<REQTARG>\? { BEGIN(REQUERY); return QMARK; }
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<REQTARG>\/ { return SLASH; }
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<REQTARG>[ ] { BEGIN(REQHTTP); return SP; }
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<REQTARG>{pchar}+ { clixon_http1_parselval.string = yytext;
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return PCHARS; }
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<REQTARG>. { clixon_http1_parseerror(_HY, "LEXICAL ERROR\n"); return -1; }
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<REQUERY>\/ { return SLASH; }
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<REQUERY>[ ] { BEGIN(REQHTTP); return SP; }
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<REQUERY>{query}+ { clixon_http1_parselval.string = strdup(yytext);
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return QUERY; }
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<REQUERY>. { clixon_http1_parseerror(_HY, "LEXICAL ERROR\n"); return -1; }
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<REQHTTP>\r\n { BEGIN(FLDNAME); return CRLF; _HY->hy_linenum++; }
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<REQHTTP>\/ { return SLASH; }
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<REQHTTP>\. { return DOT; }
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<REQHTTP>HTTP { BEGIN(REQHTTP); return HTTP; }
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<REQHTTP>[0-9] { clixon_http1_parselval.intval = atoi(yytext);
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return DIGIT; }
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<REQHTTP>. { clixon_http1_parseerror(_HY, "LEXICAL ERROR\n"); return -1; }
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<FLDNAME>: { BEGIN(FLDVALUE); return COLON; }
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<FLDNAME>\r\n { BEGIN(BODYM); return CRLF; _HY->hy_linenum++; }
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<FLDNAME>[ \t]+ { return RWS; }
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<FLDNAME>{token} { clixon_http1_parselval.string = strdup(yytext);
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return TOKEN; }
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<FLDNAME>. { clixon_http1_parseerror(_HY, "LEXICAL ERROR\n"); return -1; }
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<FLDVALUE>\r\n { BEGIN(FLDNAME); return CRLF; _HY->hy_linenum++; }
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<FLDVALUE>[ \t]+ { return RWS; }
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<FLDVALUE>[^ \t\n\r]+ { clixon_http1_parselval.string = strdup(yytext);
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return VCHARS; }
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<FLDVALUE>. { clixon_http1_parseerror(_HY, "LEXICAL ERROR\n"); return -1; }
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<BODYM>.+ { clixon_http1_parselval.string = strdup(yytext); /* note \n not . */
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return BODY; }
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<BODYM>\n { clixon_http1_parselval.string = strdup(yytext);
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_HY->hy_linenum++;
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return BODY; }
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<BODYM><<EOF>> { return X_EOF; }
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%%
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/*! Initialize scanner.
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*/
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int
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http1_scan_init(clixon_http1_yacc *hy)
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{
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BEGIN(REQLINE);
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hy->hy_lexbuf = yy_scan_string(hy->hy_parse_string);
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#if 1 /* XXX: just to use unput to avoid warning */
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if (0)
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yyunput(0, "");
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#endif
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return 0;
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}
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/*
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* free buffers
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* Even within Flex version 2.5 (this is assumed), freeing buffers is different.
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*/
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int
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http1_scan_exit(clixon_http1_yacc *hy)
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{
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yy_delete_buffer(hy->hy_lexbuf);
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clixon_http1_parselex_destroy(); /* modern */
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return 0;
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}
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