X-Git-Url: http://www.privoxy.org/gitweb/?p=privoxy.git;a=blobdiff_plain;f=parsers.c;h=df2ae59a437fe209a9b0c867516a61b8a061625f;hp=50539f061b486e45d4ba185223bc238c9884770e;hb=b56f4b76d19d15043bb84eb5146b69f9ba255481;hpb=7e3b785a3942081948f9387b1f81dfedc4ae9ef3 diff --git a/parsers.c b/parsers.c index 50539f06..df2ae59a 100644 --- a/parsers.c +++ b/parsers.c @@ -1,4 +1,4 @@ -const char parsers_rcs[] = "$Id: parsers.c,v 1.26 2001/09/16 17:05:14 jongfoster Exp $"; +const char parsers_rcs[] = "$Id: parsers.c,v 1.55 2002/05/08 16:01:07 oes Exp $"; /********************************************************************* * * File : $Source: /cvsroot/ijbswa/current/parsers.c,v $ @@ -10,18 +10,17 @@ const char parsers_rcs[] = "$Id: parsers.c,v 1.26 2001/09/16 17:05:14 jongfoster * `client_uagent', `client_x_forwarded', * `client_x_forwarded_adder', `client_xtra_adder', * `content_type', `crumble', `destroy_list', `enlist', - * `flush_socket', `free_http_request', `get_header', - * `list_to_text', `parse_http_request', `sed', + * `flush_socket', ``get_header', `sed', * and `server_set_cookie'. * * Copyright : Written by and Copyright (C) 2001 the SourceForge - * IJBSWA team. http://ijbswa.sourceforge.net + * Privoxy team. http://www.privoxy.org/ * * Based on the Internet Junkbuster originally written - * by and Copyright (C) 1997 Anonymous Coders and + * by and Copyright (C) 1997 Anonymous Coders and * Junkbusters Corporation. http://www.junkbusters.com * - * This program is free software; you can redistribute it + * This program is free software; you can redistribute it * and/or modify it under the terms of the GNU General * Public License as published by the Free Software * Foundation; either version 2 of the License, or (at @@ -41,6 +40,161 @@ const char parsers_rcs[] = "$Id: parsers.c,v 1.26 2001/09/16 17:05:14 jongfoster * * Revisions : * $Log: parsers.c,v $ + * Revision 1.55 2002/05/08 16:01:07 oes + * Optimized add_to_iob: + * - Use realloc instead of malloc(), memcpy(), free() + * - Expand to powers of two if possible, to get + * O(log n) reallocs instead of O(n). + * - Moved check for buffer limit here from chat + * - Report failure via returncode + * + * Revision 1.54 2002/04/02 15:03:16 oes + * Tiny code cosmetics + * + * Revision 1.53 2002/03/26 22:29:55 swa + * we have a new homepage! + * + * Revision 1.52 2002/03/24 13:25:43 swa + * name change related issues + * + * Revision 1.51 2002/03/13 00:27:05 jongfoster + * Killing warnings + * + * Revision 1.50 2002/03/12 01:45:35 oes + * More verbose logging + * + * Revision 1.49 2002/03/09 20:03:52 jongfoster + * - Making various functions return int rather than size_t. + * (Undoing a recent change). Since size_t is unsigned on + * Windows, functions like read_socket that return -1 on + * error cannot return a size_t. + * + * THIS WAS A MAJOR BUG - it caused frequent, unpredictable + * crashes, and also frequently caused JB to jump to 100% + * CPU and stay there. (Because it thought it had just + * read ((unsigned)-1) == 4Gb of data...) + * + * - The signature of write_socket has changed, it now simply + * returns success=0/failure=nonzero. + * + * - Trying to get rid of a few warnings --with-debug on + * Windows, I've introduced a new type "jb_socket". This is + * used for the socket file descriptors. On Windows, this + * is SOCKET (a typedef for unsigned). Everywhere else, it's + * an int. The error value can't be -1 any more, so it's + * now JB_INVALID_SOCKET (which is -1 on UNIX, and in + * Windows it maps to the #define INVALID_SOCKET.) + * + * - The signature of bind_port has changed. + * + * Revision 1.48 2002/03/07 03:46:53 oes + * Fixed compiler warnings etc + * + * Revision 1.47 2002/02/20 23:15:13 jongfoster + * Parsing functions now handle out-of-memory gracefully by returning + * an error code. + * + * Revision 1.46 2002/01/17 21:03:47 jongfoster + * Moving all our URL and URL pattern parsing code to urlmatch.c. + * + * Revision 1.45 2002/01/09 14:33:03 oes + * Added support for localtime_r. + * + * Revision 1.44 2001/12/14 01:22:54 steudten + * Remove 'user:pass@' from 'proto://user:pass@host' for the + * new added header 'Host: ..'. (See Req ID 491818) + * + * Revision 1.43 2001/11/23 00:26:38 jongfoster + * Fixing two really stupid errors in my previous commit + * + * Revision 1.42 2001/11/22 21:59:30 jongfoster + * Adding code to handle +no-cookies-keep + * + * Revision 1.41 2001/11/05 23:43:05 steudten + * Add time+date to log files. + * + * Revision 1.40 2001/10/26 20:13:09 jongfoster + * ctype.h is needed in Windows, too. + * + * Revision 1.39 2001/10/26 17:40:04 oes + * Introduced get_header_value() + * Removed http->user_agent, csp->referrer and csp->accept_types + * Removed client_accept() + * + * Revision 1.38 2001/10/25 03:40:48 david__schmidt + * Change in porting tactics: OS/2's EMX porting layer doesn't allow multiple + * threads to call select() simultaneously. So, it's time to do a real, live, + * native OS/2 port. See defines for __EMX__ (the porting layer) vs. __OS2__ + * (native). Both versions will work, but using __OS2__ offers multi-threading. + * + * Revision 1.37 2001/10/23 21:36:02 jongfoster + * Documenting sed()'s error behaviou (doc change only) + * + * Revision 1.36 2001/10/13 12:51:51 joergs + * Removed client_host, (was only required for the old 2.0.2-11 http://noijb. + * force-load), instead crumble Host: and add it (again) in client_host_adder + * (in case we get a HTTP/1.0 request without Host: header and forward it to + * a HTTP/1.1 server/proxy). + * + * Revision 1.35 2001/10/09 22:39:21 jongfoster + * assert.h is also required under Win32, so moving out of #ifndef _WIN32 + * block. + * + * Revision 1.34 2001/10/07 18:50:55 oes + * Added server_content_encoding, renamed server_transfer_encoding + * + * Revision 1.33 2001/10/07 18:04:49 oes + * Changed server_http11 to server_http and its pattern to "HTTP". + * Additional functionality: it now saves the HTTP status into + * csp->http->status and sets CT_TABOO for Status 206 (partial range) + * + * Revision 1.32 2001/10/07 15:43:28 oes + * Removed FEATURE_DENY_GZIP and replaced it with client_accept_encoding, + * client_te and client_accept_encoding_adder, triggered by the new + * +no-compression action. For HTTP/1.1 the Accept-Encoding header is + * changed to allow only identity and chunked, and the TE header is + * crunched. For HTTP/1.0, Accept-Encoding is crunched. + * + * parse_http_request no longer does anything than parsing. The rewriting + * of http->cmd and version mangling are gone. It now also recognizes + * the put and delete methods and saves the url in http->url. Removed + * unused variable. + * + * renamed content_type and content_length to have the server_ prefix + * + * server_content_type now only works if csp->content_type != CT_TABOO + * + * added server_transfer_encoding, which + * - Sets CT_TABOO to prohibit filtering if encoding compresses + * - Raises the CSP_FLAG_CHUNKED flag if Encoding is "chunked" + * - Change from "chunked" to "identity" if body was chunked + * but has been de-chunked for filtering. + * + * added server_content_md5 which crunches any Content-MD5 headers + * if the body was modified. + * + * made server_http11 conditional on +downgrade action + * + * Replaced 6 boolean members of csp with one bitmap (csp->flags) + * + * Revision 1.31 2001/10/05 14:25:02 oes + * Crumble Keep-Alive from Server + * + * Revision 1.30 2001/09/29 12:56:03 joergs + * IJB now changes HTTP/1.1 to HTTP/1.0 in requests and answers. + * + * Revision 1.29 2001/09/24 21:09:24 jongfoster + * Fixing 2 memory leaks that Guy spotted, where the paramater to + * enlist() was not being free()d. + * + * Revision 1.28 2001/09/22 16:32:28 jongfoster + * Removing unused #includes. + * + * Revision 1.27 2001/09/20 15:45:25 steudten + * + * add casting from size_t to int for printf() + * remove local variable shadow s2 + * * Revision 1.26 2001/09/16 17:05:14 jongfoster * Removing unused #include showarg.h * @@ -231,13 +385,17 @@ const char parsers_rcs[] = "$Id: parsers.c,v 1.26 2001/09/16 17:05:14 jongfoster #include "config.h" +#ifndef _WIN32 #include #include +#endif + #include #include +#include #include -#ifndef _WIN32 +#if !defined(_WIN32) && !defined(__OS2__) #include #endif @@ -245,14 +403,11 @@ const char parsers_rcs[] = "$Id: parsers.c,v 1.26 2001/09/16 17:05:14 jongfoster #include "list.h" #include "parsers.h" #include "encode.h" -#include "filters.h" -#include "loaders.h" -#include "jcc.h" #include "ssplit.h" #include "errlog.h" #include "jbsockets.h" #include "miscutil.h" -#include "cgi.h" +#include "list.h" const char parsers_h_rcs[] = PARSERS_H_VERSION; @@ -262,8 +417,8 @@ const char parsers_h_rcs[] = PARSERS_H_VERSION; * as an array index. Therefore we need to make sure that high-bit * characters generate +ve values, and ideally we also want to make * the argument match the declared parameter type of "int". - * - * Why did they write a character function that can't take a simple + * + * Why did they write a character function that can't take a simple * "char" argument? Doh! */ #define ijb_isupper(__X) isupper((int)(unsigned char)(__X)) @@ -277,43 +432,44 @@ const struct parsers client_patterns[] = { { "from:", 5, client_from }, { "cookie:", 7, client_send_cookie }, { "x-forwarded-for:", 16, client_x_forwarded }, -#ifdef FEATURE_DENY_GZIP - { "Accept-Encoding: gzip", 21, crumble }, -#endif /* def FEATURE_DENY_GZIP */ -#if defined(FEATURE_IMAGE_DETECT_MSIE) - { "Accept:", 7, client_accept }, -#endif /* defined(FEATURE_IMAGE_DETECT_MSIE) */ -#ifdef FEATURE_FORCE_LOAD - { "Host:", 5, client_host }, -#endif /* def FEATURE_FORCE_LOAD */ + { "Accept-Encoding:", 16, client_accept_encoding }, + { "TE:", 3, client_te }, + { "Host:", 5, crumble }, /* { "if-modified-since:", 18, crumble }, */ { "Keep-Alive:", 11, crumble }, { "connection:", 11, crumble }, - { "proxy-connection:", 17, crumble }, + { "proxy-connection:", 17, crumble }, { NULL, 0, NULL } }; const struct parsers server_patterns[] = { + { "HTTP", 4, server_http }, { "set-cookie:", 11, server_set_cookie }, { "connection:", 11, crumble }, - { "Content-Type:", 13, content_type }, - { "Content-Length:", 15, content_length }, + { "Content-Type:", 13, server_content_type }, + { "Content-Length:", 15, server_content_length }, + { "Content-MD5:", 12, server_content_md5 }, + { "Content-Encoding:", 17, server_content_encoding }, + { "Transfer-Encoding:", 18, server_transfer_coding }, + { "Keep-Alive:", 11, crumble }, { NULL, 0, NULL } }; -void (* const add_client_headers[])(struct client_state *) = { +const add_header_func_ptr add_client_headers[] = { + client_host_adder, client_cookie_adder, client_x_forwarded_adder, client_xtra_adder, - connection_close_adder, + client_accept_encoding_adder, + connection_close_adder, NULL }; -void (* const add_server_headers[])(struct client_state *) = { - connection_close_adder, +const add_header_func_ptr add_server_headers[] = { + connection_close_adder, NULL }; @@ -336,19 +492,22 @@ void (* const add_server_headers[])(struct client_state *) = { * file, the results are not portable. * *********************************************************************/ -int flush_socket(int fd, struct client_state *csp) +int flush_socket(jb_socket fd, struct client_state *csp) { struct iob *iob = csp->iob; - int n = iob->eod - iob->cur; + int len = iob->eod - iob->cur; - if (n <= 0) + if (len <= 0) { return(0); } - n = write_socket(fd, iob->cur, n); + if (write_socket(fd, iob->cur, (size_t)len)) + { + return(-1); + } iob->eod = iob->cur = iob->buf; - return(n); + return(len); } @@ -357,70 +516,74 @@ int flush_socket(int fd, struct client_state *csp) * * Function : add_to_iob * - * Description : Add content to the buffered page. + * Description : Add content to the buffered page, expanding the + * buffer if necessary. * * Parameters : * 1 : csp = Current client state (buffers, headers, etc...) * 2 : buf = holds the content to be added to the page * 3 : n = number of bytes to be added * - * Returns : Number of bytes in the content buffer. + * Returns : JB_ERR_OK on success, JB_ERR_MEMORY if out-of-memory + * or buffer limit reached. * *********************************************************************/ -int add_to_iob(struct client_state *csp, char *buf, int n) +jb_err add_to_iob(struct client_state *csp, char *buf, int n) { struct iob *iob = csp->iob; - int have, need; + size_t used, offset, need, want; char *p; - have = iob->eod - iob->cur; + if (n <= 0) return JB_ERR_OK; - if (n <= 0) - { - return(have); - } + used = iob->eod - iob->buf; + offset = iob->cur - iob->buf; + need = used + n + 1; - need = have + n; - - if ((p = (char *)malloc(need + 1)) == NULL) + /* + * If the buffer can't hold the new data, extend it first. + * Use the next power of two if possible, else use the actual need. + */ + if (need > csp->config->buffer_limit) { - log_error(LOG_LEVEL_ERROR, "malloc() iob failed: %E"); - return(-1); + log_error(LOG_LEVEL_ERROR, "Buffer limit reached while extending the buffer (iob)"); + return JB_ERR_MEMORY; } - if (have) + if (need > iob->size) { - /* there is something in the buffer - save it */ - memcpy(p, iob->cur, have); + for (want = csp->iob->size ? csp->iob->size : 512; want <= need;) want *= 2; + + if (want <= csp->config->buffer_limit && NULL != (p = (char *)realloc(iob->buf, want))) + { + iob->size = want; + } + else if (NULL != (p = (char *)realloc(iob->buf, need))) + { + iob->size = need; + } + else + { + log_error(LOG_LEVEL_ERROR, "Extending the buffer (iob) failed: %E"); + return JB_ERR_MEMORY; + } - /* replace the buffer with the new space */ - freez(iob->buf); - iob->buf = p; - - /* point to the end of the data */ - p += have; - } - else - { - /* the buffer is empty, free it and reinitialize */ - freez(iob->buf); + /* Update the iob pointers */ + iob->cur = p + offset; + iob->eod = p + used; iob->buf = p; } /* copy the new data into the iob buffer */ - memcpy(p, buf, n); + memcpy(iob->eod, buf, (size_t)n); /* point to the end of the data */ - p += n; + iob->eod += n; /* null terminate == cheap insurance */ - *p = '\0'; + *iob->eod = '\0'; - /* set the pointers to the new values */ - iob->cur = iob->buf; - iob->eod = p; - - return(need); + return JB_ERR_OK; } @@ -457,12 +620,17 @@ char *get_header(struct client_state *csp) *p = '\0'; ret = strdup(iob->cur); + if (ret == NULL) + { + /* FIXME No way to handle error properly */ + log_error(LOG_LEVEL_FATAL, "Out of memory in get_header()"); + } iob->cur = p+1; - if ((q = strchr(ret, '\r'))) *q = '\0'; + if ((q = strchr(ret, '\r')) != NULL) *q = '\0'; - /* is this a blank linke (i.e. the end of the header) ? */ + /* is this a blank line (i.e. the end of the header) ? */ if (*ret == '\0') { freez(ret); @@ -474,6 +642,56 @@ char *get_header(struct client_state *csp) } +/********************************************************************* + * + * Function : get_header_value + * + * Description : Get the value of a given header from a chained list + * of header lines or return NULL if no such header is + * present in the list. + * + * Parameters : + * 1 : header_list = pointer to list + * 2 : header_name = string with name of header to look for. + * Trailing colon required, capitalization + * doesn't matter. + * + * Returns : NULL if not found, else value of header + * + *********************************************************************/ +char *get_header_value(const struct list *header_list, const char *header_name) +{ + struct list_entry *cur_entry; + char *ret = NULL; + size_t length = 0; + + assert(header_list); + assert(header_name); + length = strlen(header_name); + + for (cur_entry = header_list->first; cur_entry ; cur_entry = cur_entry->next) + { + if (cur_entry->str) + { + if (!strncmpic(cur_entry->str, header_name, length)) + { + /* + * Found: return pointer to start of value + */ + ret = (char *) (cur_entry->str + length); + while (*ret && ijb_isspace(*ret)) ret++; + return(ret); + } + } + } + + /* + * Not found + */ + return NULL; + +} + /********************************************************************* * * Function : sed @@ -492,19 +710,22 @@ char *get_header(struct client_state *csp) * headers (client or server) * 3 : csp = Current client state (buffers, headers, etc...) * - * Returns : Single pointer to a fully formed header. + * Returns : Single pointer to a fully formed header, or NULL + * on out-of-memory error. * *********************************************************************/ -char *sed(const struct parsers pats[], void (* const more_headers[])(struct client_state *), struct client_state *csp) +char *sed(const struct parsers pats[], + const add_header_func_ptr more_headers[], + struct client_state *csp) { struct list_entry *p; const struct parsers *v; - char *hdr; - void (* const *f)(); + const add_header_func_ptr *f; + jb_err err = JB_ERR_OK; - for (v = pats; v->str ; v++) + for (v = pats; (err == JB_ERR_OK) && (v->str != NULL) ; v++) { - for (p = csp->headers->first; p ; p = p->next) + for (p = csp->headers->first; (err == JB_ERR_OK) && (p != NULL) ; p = p->next) { /* Header crunch()ed in previous run? -> ignore */ if (p->str == NULL) continue; @@ -513,290 +734,312 @@ char *sed(const struct parsers pats[], void (* const more_headers[])(struct clie if (strncmpic(p->str, v->str, v->len) == 0) { - hdr = v->parser(v, p->str, csp); - freez((char *)p->str); /* FIXME: Yuck! patching a list...*/ - p->str = hdr; + err = v->parser(csp, (char **)&(p->str)); } } } /* place any additional headers on the csp->headers list */ - for (f = more_headers; *f ; f++) + for (f = more_headers; (err == JB_ERR_OK) && (*f) ; f++) { - (*f)(csp); + err = (*f)(csp); } - hdr = list_to_text(csp->headers); - - return(hdr); + if (err != JB_ERR_OK) + { + return NULL; + } + return list_to_text(csp->headers); } +/* here begins the family of parser functions that reformat header lines */ + + /********************************************************************* * - * Function : free_http_request + * Function : crumble * - * Description : Freez a http_request structure + * Description : This is called if a header matches a pattern to "crunch" * * Parameters : - * 1 : http = points to a http_request structure to free + * 1 : csp = Current client state (buffers, headers, etc...) + * 2 : header = On input, pointer to header to modify. + * On output, pointer to the modified header, or NULL + * to remove the header. This function frees the + * original string if necessary. * - * Returns : N/A + * Returns : JB_ERR_OK on success, or + * JB_ERR_MEMORY on out-of-memory error. * *********************************************************************/ -void free_http_request(struct http_request *http) +jb_err crumble(struct client_state *csp, char **header) { - freez(http->cmd); - freez(http->gpc); - freez(http->host); - freez(http->hostport); - freez(http->path); - freez(http->ver); - freez(http->host_ip_addr_str); - freez(http->user_agent); - + log_error(LOG_LEVEL_HEADER, "crunch!"); + freez(*header); + return JB_ERR_OK; } /********************************************************************* * - * Function : parse_http_request + * Function : server_content_type * - * Description : Parse out the host and port from the URL. Find the - * hostname & path, port (if ':'), and/or password (if '@') + * Description : Set the content-type for filterable types (text/.*, + * javascript and image/gif) unless filtering has been + * forbidden (CT_TABOO) while parsing earlier headers. * * Parameters : - * 1 : req = URL (or is it URI?) to break down - * 2 : http = pointer to the http structure to hold elements - * 3 : csp = Current client state (buffers, headers, etc...) + * 1 : csp = Current client state (buffers, headers, etc...) + * 2 : header = On input, pointer to header to modify. + * On output, pointer to the modified header, or NULL + * to remove the header. This function frees the + * original string if necessary. * - * Returns : N/A + * Returns : JB_ERR_OK on success, or + * JB_ERR_MEMORY on out-of-memory error. * *********************************************************************/ -void parse_http_request(char *req, struct http_request *http, struct client_state *csp) +jb_err server_content_type(struct client_state *csp, char **header) { - char *buf, *v[10], *url, *p, *save_url; - int n; + if (csp->content_type != CT_TABOO) + { + if (strstr(*header, " text/") + || strstr(*header, "application/x-javascript")) + csp->content_type = CT_TEXT; + else if (strstr(*header, " image/gif")) + csp->content_type = CT_GIF; + else + csp->content_type = 0; + } - memset(http, '\0', sizeof(*http)); + return JB_ERR_OK; +} - http->cmd = strdup(req); - buf = strdup(req); - n = ssplit(buf, " \r\n", v, SZ(v), 1, 1); +/********************************************************************* + * + * Function : server_transfer_coding + * + * Description : - Prohibit filtering (CT_TABOO) if transfer coding compresses + * - Raise the CSP_FLAG_CHUNKED flag if coding is "chunked" + * - Change from "chunked" to "identity" if body was chunked + * but has been de-chunked for filtering. + * + * Parameters : + * 1 : csp = Current client state (buffers, headers, etc...) + * 2 : header = On input, pointer to header to modify. + * On output, pointer to the modified header, or NULL + * to remove the header. This function frees the + * original string if necessary. + * + * Returns : JB_ERR_OK on success, or + * JB_ERR_MEMORY on out-of-memory error. + * + *********************************************************************/ +jb_err server_transfer_coding(struct client_state *csp, char **header) +{ + /* + * Turn off pcrs and gif filtering if body compressed + */ + if (strstr(*header, "gzip") || strstr(*header, "compress") || strstr(*header, "deflate")) + { + csp->content_type = CT_TABOO; + } - if (n == 3) + /* + * Raise flag if body chunked + */ + if (strstr(*header, "chunked")) { - /* this could be a CONNECT request */ - if (strcmpic(v[0], "connect") == 0) - { - http->ssl = 1; - http->gpc = strdup(v[0]); - http->hostport = strdup(v[1]); - http->ver = strdup(v[2]); - } + csp->flags |= CSP_FLAG_CHUNKED; - /* or it could be a GET or a POST (possibly webDAV too) */ - if ((0 == strcmpic(v[0], "get")) - || (0 == strcmpic(v[0], "head")) - || (0 == strcmpic(v[0], "post")) - /* These are the headers as defined in RFC2518 to add webDAV support: */ - || (0 == strcmpic(v[0], "propfind")) - || (0 == strcmpic(v[0], "proppatch")) - || (0 == strcmpic(v[0], "move")) - || (0 == strcmpic(v[0], "copy")) - || (0 == strcmpic(v[0], "mkcol")) - || (0 == strcmpic(v[0], "lock")) - || (0 == strcmpic(v[0], "unlock")) - ) + /* + * If the body was modified, it has been + * de-chunked first, so adjust the header: + */ + if (csp->flags & CSP_FLAG_MODIFIED) { - http->ssl = 0; - http->gpc = strdup(v[0]); - url = v[1]; - http->ver = strdup(v[2]); - - save_url = url; - if (strncmpic(url, "http://", 7) == 0) - { - url += 7; - } - else if (strncmpic(url, "https://", 8) == 0) - { - url += 8; - } - else - { - url = NULL; - } - - if (url) - { - if ((p = strchr(url, '/'))) - { - http->path = strdup(p); - *p = '\0'; - http->hostport = strdup(url); - } - /* - * Repair broken HTTP requests that don't contain a path - */ - else - { - /* Repair hostport & path */ - http->path = strdup("/"); - http->hostport = strdup(url); - - /* Even repair cmd in case we're just forwarding. Boy are we nice ;-) */ - freez(http->cmd); - http->cmd = strsav(http->cmd, http->gpc); - http->cmd = strsav(http->cmd, " "); - http->cmd = strsav(http->cmd, save_url); - http->cmd = strsav(http->cmd, "/ "); - http->cmd = strsav(http->cmd, http->ver); - } - } + freez(*header); + *header = strdup("Transfer-Encoding: identity"); + return (header == NULL) ? JB_ERR_MEMORY : JB_ERR_OK; } } - freez(buf); + return JB_ERR_OK; +} - if (http->hostport == NULL) +/********************************************************************* + * + * Function : server_content_encoding + * + * Description : Prohibit filtering (CT_TABOO) if content encoding compresses + * + * Parameters : + * 1 : csp = Current client state (buffers, headers, etc...) + * 2 : header = On input, pointer to header to modify. + * On output, pointer to the modified header, or NULL + * to remove the header. This function frees the + * original string if necessary. + * + * Returns : JB_ERR_OK on success, or + * JB_ERR_MEMORY on out-of-memory error. + * + *********************************************************************/ +jb_err server_content_encoding(struct client_state *csp, char **header) +{ + /* + * Turn off pcrs and gif filtering if body compressed + */ + if (strstr(*header, "gzip") || strstr(*header, "compress") || strstr(*header, "deflate")) { - free_http_request(http); - return; + csp->content_type = CT_TABOO; } - buf = strdup(http->hostport); - + return JB_ERR_OK; - /* check if url contains password */ - n = ssplit(buf, "@", v, SZ(v), 1, 1); - if (n == 2) - { - char * newbuf = NULL; - newbuf = strdup(v[1]); - freez(buf); - buf = newbuf; - } +} - n = ssplit(buf, ":", v, SZ(v), 1, 1); - if (n == 1) - { - http->host = strdup(v[0]); - http->port = 80; - } - - if (n == 2) +/********************************************************************* + * + * Function : server_content_length + * + * Description : Adjust Content-Length header if we modified + * the body. + * + * Parameters : + * 1 : csp = Current client state (buffers, headers, etc...) + * 2 : header = On input, pointer to header to modify. + * On output, pointer to the modified header, or NULL + * to remove the header. This function frees the + * original string if necessary. + * + * Returns : JB_ERR_OK on success, or + * JB_ERR_MEMORY on out-of-memory error. + * + *********************************************************************/ +jb_err server_content_length(struct client_state *csp, char **header) +{ + if (csp->content_length != 0) /* Content length has been modified */ { - http->host = strdup(v[0]); - http->port = atoi(v[1]); - } - - freez(buf); + freez(*header); + *header = (char *) zalloc(100); + if (*header == NULL) + { + return JB_ERR_MEMORY; + } - if (http->host == NULL) - { - free_http_request(http); - } + sprintf(*header, "Content-Length: %d", (int) csp->content_length); - if (http->path == NULL) - { - http->path = strdup(""); + log_error(LOG_LEVEL_HEADER, "Adjust Content-Length to %d", (int) csp->content_length); } + return JB_ERR_OK; } -/* here begins the family of parser functions that reformat header lines */ - - /********************************************************************* * - * Function : crumble + * Function : server_content_md5 * - * Description : This is called if a header matches a pattern to "crunch" + * Description : Crumble any Content-MD5 headers if the document was + * modified. FIXME: Should we re-compute instead? * * Parameters : - * 1 : v = Pointer to parsers structure, which basically holds - * headers (client or server) that we want to "crunch" - * 2 : s = header (from sed) to "crunch" - * 3 : csp = Current client state (buffers, headers, etc...) + * 1 : csp = Current client state (buffers, headers, etc...) + * 2 : header = On input, pointer to header to modify. + * On output, pointer to the modified header, or NULL + * to remove the header. This function frees the + * original string if necessary. * - * Returns : Always NULL. + * Returns : JB_ERR_OK on success, or + * JB_ERR_MEMORY on out-of-memory error. * *********************************************************************/ -char *crumble(const struct parsers *v, const char *s, struct client_state *csp) +jb_err server_content_md5(struct client_state *csp, char **header) { - log_error(LOG_LEVEL_HEADER, "crunch!"); - return(NULL); + if (csp->flags & CSP_FLAG_MODIFIED) + { + log_error(LOG_LEVEL_HEADER, "Crunching Content-MD5"); + freez(*header); + } + return JB_ERR_OK; } /********************************************************************* * - * Function : content_type + * Function : client_accept_encoding * - * Description : Is this a text/.* or javascript MIME Type? + * Description : Rewrite the client's Accept-Encoding header so that + * if doesn't allow compression, if the action applies. + * Note: For HTTP/1.0 the absence of the header is enough. * * Parameters : - * 1 : v = ignored - * 2 : s = header string we are "considering" - * 3 : csp = Current client state (buffers, headers, etc...) + * 1 : csp = Current client state (buffers, headers, etc...) + * 2 : header = On input, pointer to header to modify. + * On output, pointer to the modified header, or NULL + * to remove the header. This function frees the + * original string if necessary. * - * Returns : A duplicate string pointer to this header (ie. pass thru) + * Returns : JB_ERR_OK on success, or + * JB_ERR_MEMORY on out-of-memory error. * *********************************************************************/ -char *content_type(const struct parsers *v, const char *s, struct client_state *csp) +jb_err client_accept_encoding(struct client_state *csp, char **header) { - if (strstr(s, " text/") || strstr(s, "application/x-javascript")) - csp->content_type = CT_TEXT; - else if (strstr(s, " image/gif")) - csp->content_type = CT_GIF; - else - csp->content_type = 0; + if ((csp->action->flags & ACTION_NO_COMPRESSION) != 0) + { + log_error(LOG_LEVEL_HEADER, "Supressed offer to compress content"); - return(strdup(s)); + freez(*header); + if (!strcmpic(csp->http->ver, "HTTP/1.1")) + { + *header = strdup("Accept-Encoding: identity;q=1.0, *;q=0"); + if (*header == NULL) + { + return JB_ERR_MEMORY; + } + } + } + return JB_ERR_OK; } /********************************************************************* * - * Function : content_length + * Function : client_te * - * Description : Adjust Content-Length header if we modified - * the body. + * Description : Rewrite the client's TE header so that + * if doesn't allow compression, if the action applies. * * Parameters : - * 1 : v = ignored - * 2 : s = header string we are "considering" - * 3 : csp = Current client state (buffers, headers, etc...) + * 1 : csp = Current client state (buffers, headers, etc...) + * 2 : header = On input, pointer to header to modify. + * On output, pointer to the modified header, or NULL + * to remove the header. This function frees the + * original string if necessary. * - * Returns : A duplicate string pointer to this header (ie. pass thru) + * Returns : JB_ERR_OK on success, or + * JB_ERR_MEMORY on out-of-memory error. * *********************************************************************/ -char *content_length(const struct parsers *v, const char *s, struct client_state *csp) +jb_err client_te(struct client_state *csp, char **header) { - if (csp->content_length != 0) /* Content has been modified */ - { - char * s2 = (char *) zalloc(100); - sprintf(s2, "Content-Length: %d", (int) csp->content_length); - - log_error(LOG_LEVEL_HEADER, "Adjust Content-Length to %d", (int) csp->content_length); - return(s2); - } - else + if ((csp->action->flags & ACTION_NO_COMPRESSION) != 0) { - return(strdup(s)); + freez(*header); + log_error(LOG_LEVEL_HEADER, "Supressed offer to compress transfer"); } + return JB_ERR_OK; } - /********************************************************************* * * Function : client_referrer @@ -805,98 +1048,81 @@ char *content_length(const struct parsers *v, const char *s, struct client_state * Called from `sed'. * * Parameters : - * 1 : v = ignored - * 2 : s = header (from sed) to "crunch" - * 3 : csp = Current client state (buffers, headers, etc...) + * 1 : csp = Current client state (buffers, headers, etc...) + * 2 : header = On input, pointer to header to modify. + * On output, pointer to the modified header, or NULL + * to remove the header. This function frees the + * original string if necessary. * - * Returns : NULL if crunched, or a malloc'ed string with the original - * or modified header + * Returns : JB_ERR_OK on success, or + * JB_ERR_MEMORY on out-of-memory error. * *********************************************************************/ -char *client_referrer(const struct parsers *v, const char *s, struct client_state *csp) +jb_err client_referrer(struct client_state *csp, char **header) { - const char * newval; - char * s2; + const char *newval; + #ifdef FEATURE_FORCE_LOAD /* Since the referrer can include the prefix even * even if the request itself is non-forced, we must - * clean it unconditionally + * clean it unconditionally */ - strclean(s, FORCE_PREFIX); + strclean(*header, FORCE_PREFIX); #endif /* def FEATURE_FORCE_LOAD */ -#ifdef FEATURE_TRUST - csp->referrer = strdup(s); -#endif /* def FEATURE_TRUST */ - /* * Are we sending referer? */ if ((csp->action->flags & ACTION_HIDE_REFERER) == 0) { - return(strdup(s)); + return JB_ERR_OK; } + freez(*header); + newval = csp->action->string[ACTION_STRING_REFERER]; - /* - * Are we blocking referer? - */ if ((newval == NULL) || (0 == strcmpic(newval, "block")) ) - { - log_error(LOG_LEVEL_HEADER, "crunch!"); - return(NULL); - } - - /* - * Are we forging referer? - */ - if (0 == strcmpic(newval, "forge")) { /* - * Forge a referer as http://[hostname:port of REQUEST]/ - * to fool stupid checks for in-site links + * Blocking referer */ - log_error(LOG_LEVEL_HEADER, "crunch+forge!"); - s2 = strsav(NULL, "Referer: "); - s2 = strsav(s2, "http://"); - s2 = strsav(s2, csp->http->hostport); - s2 = strsav(s2, "/"); - return(s2); + log_error(LOG_LEVEL_HEADER, "crunch!"); + return JB_ERR_OK; } - - /* - * Have we got a fixed referer? - */ - if (0 == strncmpic(newval, "http://", 7)) + else if (0 == strncmpic(newval, "http://", 7)) { /* * We have a specific (fixed) referer we want to send. */ - char * s3; - log_error(LOG_LEVEL_HEADER, "modified"); - s3 = strsav( NULL, "Referer: " ); - s3 = strsav( s3, newval ); - return(s3); - } + *header = strdup("Referer: "); + string_append(header, newval); - /* Should never get here! */ - log_error(LOG_LEVEL_ERROR, "Bad parameter: +referer{%s}", newval); + return (*header == NULL) ? JB_ERR_MEMORY : JB_ERR_OK; + } + else + { + /* + * Forge a referer as http://[hostname:port of REQUEST]/ + * to fool stupid checks for in-site links + */ + if (0 != strcmpic(newval, "forge")) + { + /* + * Invalid choice - but forge is probably the best default. + */ + log_error(LOG_LEVEL_ERROR, "Bad parameter: +referer{%s}", newval); + } - /* - * Forge is probably the best default. - * - * Forge a referer as http://[hostname:port of REQUEST]/ - * to fool stupid checks for in-site links - */ - log_error(LOG_LEVEL_HEADER, "crunch+forge!"); - s2 = strsav(NULL, "Referer: "); - s2 = strsav(s2, "http://"); - s2 = strsav(s2, csp->http->hostport); - s2 = strsav(s2, "/"); - return(s2); + *header = strdup("Referer: http://"); + string_append(header, csp->http->hostport); + string_append(header, "/"); + log_error(LOG_LEVEL_HEADER, "crunch+forge to %s", *header); + + return (*header == NULL) ? JB_ERR_MEMORY : JB_ERR_OK; + } } @@ -909,52 +1135,38 @@ char *client_referrer(const struct parsers *v, const char *s, struct client_stat * bug workarounds. Called from `sed'. * * Parameters : - * 1 : v = ignored - * 2 : s = header (from sed) to "crunch" - * 3 : csp = Current client state (buffers, headers, etc...) + * 1 : csp = Current client state (buffers, headers, etc...) + * 2 : header = On input, pointer to header to modify. + * On output, pointer to the modified header, or NULL + * to remove the header. This function frees the + * original string if necessary. * - * Returns : A malloc'ed pointer to the default agent, or - * a malloc'ed string pointer to this header (ie. pass thru). + * Returns : JB_ERR_OK on success, or + * JB_ERR_MEMORY on out-of-memory error. * *********************************************************************/ -char *client_uagent(const struct parsers *v, const char *s, struct client_state *csp) +jb_err client_uagent(struct client_state *csp, char **header) { - const char * newval; - char * s2; - - /* Save the client's User-Agent: value */ - if (strlen(s) >= 12) - { - csp->http->user_agent = strdup(s + 12); - } - -#ifdef FEATURE_IMAGE_DETECT_MSIE - if (strstr (s, "MSIE ")) - { - /* This is Microsoft Internet Explorer. - * Enable auto-detect. - */ - csp->accept_types |= ACCEPT_TYPE_IS_MSIE; - } -#endif /* def FEATURE_IMAGE_DETECT_MSIE */ + const char *newval; if ((csp->action->flags & ACTION_HIDE_USER_AGENT) == 0) { - return(strdup(s)); + return JB_ERR_OK; } newval = csp->action->string[ACTION_STRING_USER_AGENT]; if (newval == NULL) { - return(strdup(s)); + return JB_ERR_OK; } log_error(LOG_LEVEL_HEADER, "modified"); - s2 = strsav( NULL, "User-Agent: " ); - s2 = strsav( s2, newval ); - return(s2); + freez(*header); + *header = strdup("User-Agent: "); + string_append(header, newval); + return (*header == NULL) ? JB_ERR_MEMORY : JB_ERR_OK; } @@ -965,24 +1177,25 @@ char *client_uagent(const struct parsers *v, const char *s, struct client_state * Description : Handle "ua-" headers properly. Called from `sed'. * * Parameters : - * 1 : v = ignored - * 2 : s = header (from sed) to "crunch" - * 3 : csp = Current client state (buffers, headers, etc...) + * 1 : csp = Current client state (buffers, headers, etc...) + * 2 : header = On input, pointer to header to modify. + * On output, pointer to the modified header, or NULL + * to remove the header. This function frees the + * original string if necessary. * - * Returns : NULL if crunched, or a malloc'ed string to original header + * Returns : JB_ERR_OK on success, or + * JB_ERR_MEMORY on out-of-memory error. * *********************************************************************/ -char *client_ua(const struct parsers *v, const char *s, struct client_state *csp) +jb_err client_ua(struct client_state *csp, char **header) { - if ((csp->action->flags & ACTION_HIDE_USER_AGENT) == 0) - { - return(strdup(s)); - } - else + if ((csp->action->flags & ACTION_HIDE_USER_AGENT) != 0) { log_error(LOG_LEVEL_HEADER, "crunch!"); - return(NULL); + freez(*header); } + + return JB_ERR_OK; } @@ -994,41 +1207,44 @@ char *client_ua(const struct parsers *v, const char *s, struct client_state *csp * Called from `sed'. * * Parameters : - * 1 : v = ignored - * 2 : s = header (from sed) to "crunch" - * 3 : csp = Current client state (buffers, headers, etc...) + * 1 : csp = Current client state (buffers, headers, etc...) + * 2 : header = On input, pointer to header to modify. + * On output, pointer to the modified header, or NULL + * to remove the header. This function frees the + * original string if necessary. * - * Returns : NULL if crunched, or a malloc'ed string to - * modified/original header. + * Returns : JB_ERR_OK on success, or + * JB_ERR_MEMORY on out-of-memory error. * *********************************************************************/ -char *client_from(const struct parsers *v, const char *s, struct client_state *csp) +jb_err client_from(struct client_state *csp, char **header) { - const char * newval; - char * s2; + const char *newval; if ((csp->action->flags & ACTION_HIDE_FROM) == 0) { - return(strdup(s)); + return JB_ERR_OK; } + freez(*header); + newval = csp->action->string[ACTION_STRING_FROM]; /* - * Are we blocking referer? + * Are we blocking the e-mail address? */ if ((newval == NULL) || (0 == strcmpic(newval, "block")) ) { log_error(LOG_LEVEL_HEADER, "crunch!"); - return(NULL); + return JB_ERR_OK; } log_error(LOG_LEVEL_HEADER, " modified"); - s2 = strsav( NULL, "From: " ); - s2 = strsav( s2, newval ); - return(s2); + *header = strdup("From: "); + string_append(header, newval); + return (*header == NULL) ? JB_ERR_MEMORY : JB_ERR_OK; } @@ -1041,18 +1257,24 @@ char *client_from(const struct parsers *v, const char *s, struct client_state *c * else we crunch it. Mmmmmmmmmmm ... cookie ...... * * Parameters : - * 1 : v = pattern of cookie `sed' found matching - * 2 : s = header (from sed) to "crunch" - * 3 : csp = Current client state (buffers, headers, etc...) + * 1 : csp = Current client state (buffers, headers, etc...) + * 2 : header = On input, pointer to header to modify. + * On output, pointer to the modified header, or NULL + * to remove the header. This function frees the + * original string if necessary. * - * Returns : Always NULL. + * Returns : JB_ERR_OK on success, or + * JB_ERR_MEMORY on out-of-memory error. * *********************************************************************/ -char *client_send_cookie(const struct parsers *v, const char *s, struct client_state *csp) +jb_err client_send_cookie(struct client_state *csp, char **header) { + jb_err result = JB_ERR_OK; + if ((csp->action->flags & ACTION_NO_COOKIE_READ) == 0) { - enlist(csp->cookie_list, s + v->len + 1); + /* strlen("cookie: ") == 8 */ + result = enlist(csp->cookie_list, *header + 8); } else { @@ -1060,11 +1282,12 @@ char *client_send_cookie(const struct parsers *v, const char *s, struct client_s } /* - * Always return NULL here. The cookie header + * Always remove the cookie here. The cookie header * will be sent at the end of the header. */ - return(NULL); + freez(*header); + return result; } @@ -1076,72 +1299,91 @@ char *client_send_cookie(const struct parsers *v, const char *s, struct client_s * also used in the add_client_headers list. Called from `sed'. * * Parameters : - * 1 : v = ignored - * 2 : s = header (from sed) to "crunch" - * 3 : csp = Current client state (buffers, headers, etc...) + * 1 : csp = Current client state (buffers, headers, etc...) + * 2 : header = On input, pointer to header to modify. + * On output, pointer to the modified header, or NULL + * to remove the header. This function frees the + * original string if necessary. * - * Returns : Always NULL. + * Returns : JB_ERR_OK on success, or + * JB_ERR_MEMORY on out-of-memory error. * *********************************************************************/ -char *client_x_forwarded(const struct parsers *v, const char *s, struct client_state *csp) +jb_err client_x_forwarded(struct client_state *csp, char **header) { if ((csp->action->flags & ACTION_HIDE_FORWARDED) == 0) { /* Save it so we can re-add it later */ - csp->x_forwarded = strdup(s); - } + freez(csp->x_forwarded); + csp->x_forwarded = *header; - /* - * Always return NULL, since this information - * will be sent at the end of the header. - */ - - return(NULL); + /* + * Always set *header = NULL, since this information + * will be sent at the end of the header. + */ + *header = NULL; + } + else + { + freez(*header); + log_error(LOG_LEVEL_HEADER, " crunch!"); + } + return JB_ERR_OK; } -#if defined(FEATURE_IMAGE_DETECT_MSIE) +/* the following functions add headers directly to the header list */ + /********************************************************************* * - * Function : client_accept + * Function : client_host_adder * - * Description : Detect whether the client wants HTML or an image. - * Clients do not always make this information available - * in a sane way. Always passes the header through - * the proxy unchanged. + * Description : (re)adds the host header. Called from `sed'. * * Parameters : - * 1 : v = Ignored. - * 2 : s = Header string. Null terminated. - * 3 : csp = Current client state (buffers, headers, etc...) + * 1 : csp = Current client state (buffers, headers, etc...) * - * Returns : Duplicate of argument s. + * Returns : JB_ERR_OK on success, or + * JB_ERR_MEMORY on out-of-memory error. * *********************************************************************/ -char *client_accept(const struct parsers *v, const char *s, struct client_state *csp) +jb_err client_host_adder(struct client_state *csp) { -#ifdef FEATURE_IMAGE_DETECT_MSIE - if (strstr (s, "image/gif")) + char *p; + char *pos; + jb_err err; + + if ( !csp->http->hostport || !*(csp->http->hostport)) { - /* Client will accept HTML. If this seems counterintuitive, - * blame Microsoft. - */ - csp->accept_types |= ACCEPT_TYPE_MSIE_HTML; + return JB_ERR_OK; + } + + p = strdup("Host: "); + /* + ** remove 'user:pass@' from 'proto://user:pass@host' + */ + if ( (pos = strchr( csp->http->hostport, '@')) != NULL ) + { + string_append(&p, pos+1); } else { - csp->accept_types |= ACCEPT_TYPE_MSIE_IMAGE; + string_append(&p, csp->http->hostport); } -#endif /* def FEATURE_IMAGE_DETECT_MSIE */ - return(strdup(s)); + if (p == NULL) + { + return JB_ERR_MEMORY; + } -} -#endif /* defined(FEATURE_IMAGE_DETECT_MSIE) */ + log_error(LOG_LEVEL_HEADER, "addh: %s", p); + err = enlist(csp->headers, p); + freez(p); -/* the following functions add headers directly to the header list */ + return err; +} /********************************************************************* @@ -1153,50 +1395,90 @@ char *client_accept(const struct parsers *v, const char *s, struct client_state * Parameters : * 1 : csp = Current client state (buffers, headers, etc...) * - * Returns : N/A + * Returns : JB_ERR_OK on success, or + * JB_ERR_MEMORY on out-of-memory error. * *********************************************************************/ -void client_cookie_adder(struct client_state *csp) +jb_err client_cookie_adder(struct client_state *csp) { struct list_entry *lst; - char *tmp = NULL; - char *e; + char *tmp; + struct list_entry *list1 = csp->cookie_list->first; + struct list_entry *list2 = csp->action->multi[ACTION_MULTI_WAFER]->first; + int first_cookie = 1; + jb_err err; + + if ((list1 == NULL) && (list2 == NULL)) + { + /* Nothing to do */ + return JB_ERR_OK; + } + + tmp = strdup("Cookie: "); - for (lst = csp->cookie_list->first; lst ; lst = lst->next) + for (lst = list1; lst ; lst = lst->next) { - if (tmp) + if (first_cookie) { - tmp = strsav(tmp, "; "); + first_cookie = 0; } - tmp = strsav(tmp, lst->str); + else + { + string_append(&tmp, "; "); + } + string_append(&tmp, lst->str); } - for (lst = csp->action->multi[ACTION_MULTI_WAFER]->first; lst ; lst = lst->next) + for (lst = list2; lst ; lst = lst->next) { - if (tmp) + if (first_cookie) { - tmp = strsav(tmp, "; "); + first_cookie = 0; } - - if ((e = cookie_encode(lst->str))) + else { - tmp = strsav(tmp, e); - freez(e); + string_append(&tmp, "; "); } + string_join(&tmp, cookie_encode(lst->str)); } - if (tmp) + if (tmp == NULL) { - char *ret; + return JB_ERR_MEMORY; + } - ret = strdup("Cookie: "); - ret = strsav(ret, tmp); - log_error(LOG_LEVEL_HEADER, "addh: %s", ret); - enlist(csp->headers, ret); - freez(tmp); - freez(ret); + log_error(LOG_LEVEL_HEADER, "addh: %s", tmp); + err = enlist(csp->headers, tmp); + free(tmp); + return err; +} + + +/********************************************************************* + * + * Function : client_accept_encoding_adder + * + * Description : Add an Accept-Encoding header to the client's request + * that disables compression if the action applies, and + * the header is not already there. Called from `sed'. + * Note: For HTTP/1.0, the absence of the header is enough. + * + * Parameters : + * 1 : csp = Current client state (buffers, headers, etc...) + * + * Returns : JB_ERR_OK on success, or + * JB_ERR_MEMORY on out-of-memory error. + * + *********************************************************************/ +jb_err client_accept_encoding_adder(struct client_state *csp) +{ + if ( ((csp->action->flags & ACTION_NO_COMPRESSION) != 0) + && (!strcmpic(csp->http->ver, "HTTP/1.1")) ) + { + return enlist_unique(csp->headers, "Accept-Encoding: identity;q=1.0, *;q=0", 16); } + return JB_ERR_OK; } @@ -1209,20 +1491,28 @@ void client_cookie_adder(struct client_state *csp) * Parameters : * 1 : csp = Current client state (buffers, headers, etc...) * - * Returns : N/A + * Returns : JB_ERR_OK on success, or + * JB_ERR_MEMORY on out-of-memory error. * *********************************************************************/ -void client_xtra_adder(struct client_state *csp) +jb_err client_xtra_adder(struct client_state *csp) { struct list_entry *lst; + jb_err err; for (lst = csp->action->multi[ACTION_MULTI_ADD_HEADER]->first; lst ; lst = lst->next) { log_error(LOG_LEVEL_HEADER, "addh: %s", lst->str); - enlist(csp->headers, lst->str); + err = enlist(csp->headers, lst->str); + if (err) + { + return err; + } + } + return JB_ERR_OK; } @@ -1235,33 +1525,41 @@ void client_xtra_adder(struct client_state *csp) * Parameters : * 1 : csp = Current client state (buffers, headers, etc...) * - * Returns : N/A + * Returns : JB_ERR_OK on success, or + * JB_ERR_MEMORY on out-of-memory error. * *********************************************************************/ -void client_x_forwarded_adder(struct client_state *csp) +jb_err client_x_forwarded_adder(struct client_state *csp) { char *p = NULL; + jb_err err; if ((csp->action->flags & ACTION_HIDE_FORWARDED) != 0) { - return; + return JB_ERR_OK; } if (csp->x_forwarded) { - p = strsav(p, csp->x_forwarded); - p = strsav(p, ", "); - p = strsav(p, csp->ip_addr_str); + p = strdup(csp->x_forwarded); + string_append(&p, ", "); } else { - p = strsav(p, "X-Forwarded-For: "); - p = strsav(p, csp->ip_addr_str); + p = strdup("X-Forwarded-For: "); + } + string_append(&p, csp->ip_addr_str); + + if (p == NULL) + { + return JB_ERR_MEMORY; } log_error(LOG_LEVEL_HEADER, "addh: %s", p); - enlist(csp->headers, p); + err = enlist(csp->headers, p); + free(p); + return err; } @@ -1277,13 +1575,52 @@ void client_x_forwarded_adder(struct client_state *csp) * Parameters : * 1 : csp = Current client state (buffers, headers, etc...) * - * Returns : N/A + * Returns : JB_ERR_OK on success, or + * JB_ERR_MEMORY on out-of-memory error. + * + *********************************************************************/ +jb_err connection_close_adder(struct client_state *csp) +{ + return enlist(csp->headers, "Connection: close"); +} + + +/********************************************************************* + * + * Function : server_http + * + * Description : - Save the HTTP Status into csp->http->status + * - Set CT_TABOO to prevent filtering if the answer + * is a partial range (HTTP status 206) + * - Rewrite HTTP/1.1 answers to HTTP/1.0 if +downgrade + * action applies. + * + * Parameters : + * 1 : csp = Current client state (buffers, headers, etc...) + * 2 : header = On input, pointer to header to modify. + * On output, pointer to the modified header, or NULL + * to remove the header. This function frees the + * original string if necessary. + * + * Returns : JB_ERR_OK on success, or + * JB_ERR_MEMORY on out-of-memory error. * *********************************************************************/ -void connection_close_adder(struct client_state *csp) +jb_err server_http(struct client_state *csp, char **header) { - enlist(csp->headers, strdup("Connection: close")); + sscanf(*header, "HTTP/%*d.%*d %d", &(csp->http->status)); + if (csp->http->status == 206) + { + csp->content_type = CT_TABOO; + } + + if ((csp->action->flags & ACTION_DOWNGRADE) != 0) + { + (*header)[7] = '0'; + log_error(LOG_LEVEL_HEADER, "Downgraded answer to HTTP/1.0"); + } + return JB_ERR_OK; } @@ -1296,66 +1633,126 @@ void connection_close_adder(struct client_state *csp) * or accept it. Called from `sed'. * * Parameters : - * 1 : v = parser pattern that matched this header - * 2 : s = header that matched this pattern - * 3 : csp = Current client state (buffers, headers, etc...) + * 1 : csp = Current client state (buffers, headers, etc...) + * 2 : header = On input, pointer to header to modify. + * On output, pointer to the modified header, or NULL + * to remove the header. This function frees the + * original string if necessary. * - * Returns : `crumble' or a newly malloc'ed string. + * Returns : JB_ERR_OK on success, or + * JB_ERR_MEMORY on out-of-memory error. * *********************************************************************/ -char *server_set_cookie(const struct parsers *v, const char *s, struct client_state *csp) +jb_err server_set_cookie(struct client_state *csp, char **header) { #ifdef FEATURE_COOKIE_JAR if (csp->config->jar) { - fprintf(csp->config->jar, "%s\t%s\n", csp->http->host, (s + v->len + 1)); + /* + * Write timestamp into outbuf. + * + * Complex because not all OSs have tm_gmtoff or + * the %z field in strftime() + */ + char tempbuf[ BUFFER_SIZE ]; + time_t now; + struct tm tm_now; + time (&now); +#ifdef HAVE_LOCALTIME_R + tm_now = *localtime_r(&now, &tm_now); +#else + tm_now = *localtime (&now); +#endif + strftime(tempbuf, BUFFER_SIZE-6, "%b %d %H:%M:%S ", &tm_now); + + /* strlen("set-cookie: ") = 12 */ + fprintf(csp->config->jar, "%s %s\t%s\n", tempbuf, csp->http->host, *header + 12); } #endif /* def FEATURE_COOKIE_JAR */ if ((csp->action->flags & ACTION_NO_COOKIE_SET) != 0) { - return(crumble(v, s, csp)); + return crumble(csp, header); } + else if ((csp->action->flags & ACTION_NO_COOKIE_KEEP) != 0) + { + /* Flag whether or not to log a message */ + int changed = 0; + + /* A variable to store the tag we're working on */ + char *cur_tag; + + /* Skip "Set-Cookie:" (11 characters) in header */ + cur_tag = *header + 11; + + /* skip whitespace between "Set-Cookie:" and value */ + while (*cur_tag && ijb_isspace(*cur_tag)) + { + cur_tag++; + } - return(strdup(s)); + /* Loop through each tag in the cookie */ + while (*cur_tag) + { + /* Find next tag */ + char *next_tag = strchr(cur_tag, ';'); + if (next_tag != NULL) + { + /* Skip the ';' character itself */ + next_tag++; + + /* skip whitespace ";" and start of tag */ + while (*next_tag && ijb_isspace(*next_tag)) + { + next_tag++; + } + } + else + { + /* "Next tag" is the end of the string */ + next_tag = cur_tag + strlen(cur_tag); + } + + /* Is this the "Expires" tag? */ + if (strncmpic(cur_tag, "expires=", 8) == 0) + { + /* Delete the tag by copying the rest of the string over it. + * (Note that we cannot just use "strcpy(cur_tag, next_tag)", + * since the behaviour of strcpy is undefined for overlapping + * strings.) + */ + memmove(cur_tag, next_tag, strlen(next_tag) + 1); + /* That changed the header, need to issue a log message */ + changed = 1; + + /* Note that the next tag has now been moved to *cur_tag, + * so we do not need to update the cur_tag pointer. + */ + } + else + { + /* Move on to next cookie tag */ + cur_tag = next_tag; + } + } + + if (changed) + { + log_error(LOG_LEVEL_HEADER, "Changed cookie to a temporary one."); + } + } + + return JB_ERR_OK; } #ifdef FEATURE_FORCE_LOAD -/********************************************************************* - * - * Function : client_host - * - * Description : Clean the FORCE_PREFIX out of the 'host' http - * header, if we use force - * - * Parameters : - * 1 : v = ignored - * 2 : s = header (from sed) to clean - * 3 : csp = Current client state (buffers, headers, etc...) - * - * Returns : A malloc'ed pointer to the cleaned host header - * - *********************************************************************/ -char *client_host(const struct parsers *v, const char *s, struct client_state *csp) -{ - char *cleanhost = strdup(s); - - if(csp->force) - strclean(cleanhost, FORCE_PREFIX); - - return(cleanhost); -} -#endif /* def FEATURE_FORCE_LOAD */ - - -#ifdef FEATURE_FORCE_LOAD /********************************************************************* * * Function : strclean * - * Description : In-Situ-Eliminate all occurances of substring in + * Description : In-Situ-Eliminate all occurances of substring in * string * * Parameters : @@ -1370,12 +1767,12 @@ int strclean(const char *string, const char *substring) int hits = 0, len = strlen(substring); char *pos, *p; - while((pos = strstr(string, substring))) + while((pos = strstr(string, substring)) != NULL) { p = pos + len; do { - *(p - len) = *p; + *(p - len) = *p; } while (*p++ != '\0');