home *** CD-ROM | disk | FTP | other *** search
- /* ====================================================================
- * Copyright (c) 1996-1999 The Apache Group. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- *
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in
- * the documentation and/or other materials provided with the
- * distribution.
- *
- * 3. All advertising materials mentioning features or use of this
- * software must display the following acknowledgment:
- * "This product includes software developed by the Apache Group
- * for use in the Apache HTTP server project (http://www.apache.org/)."
- *
- * 4. The names "Apache Server" and "Apache Group" must not be used to
- * endorse or promote products derived from this software without
- * prior written permission. For written permission, please contact
- * apache@apache.org.
- *
- * 5. Products derived from this software may not be called "Apache"
- * nor may "Apache" appear in their names without prior written
- * permission of the Apache Group.
- *
- * 6. Redistributions of any form whatsoever must retain the following
- * acknowledgment:
- * "This product includes software developed by the Apache Group
- * for use in the Apache HTTP server project (http://www.apache.org/)."
- *
- * THIS SOFTWARE IS PROVIDED BY THE APACHE GROUP ``AS IS'' AND ANY
- * EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
- * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE APACHE GROUP OR
- * ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
- * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
- * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
- * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
- * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
- * OF THE POSSIBILITY OF SUCH DAMAGE.
- * ====================================================================
- *
- * This software consists of voluntary contributions made by many
- * individuals on behalf of the Apache Group and was originally based
- * on public domain software written at the National Center for
- * Supercomputing Applications, University of Illinois, Urbana-Champaign.
- * For more information on the Apache Group and the Apache HTTP server
- * project, please see <http://www.apache.org/>.
- *
- */
-
- /* Utility routines for Apache proxy */
- #include "mod_proxy.h"
- #include "http_main.h"
- #include "ap_md5.h"
- #include "multithread.h"
- #include "http_log.h"
- #include "util_uri.h"
- #include "util_date.h" /* get ap_checkmask() decl. */
-
- static int proxy_match_ipaddr(struct dirconn_entry *This, request_rec *r);
- static int proxy_match_domainname(struct dirconn_entry *This, request_rec *r);
- static int proxy_match_hostname(struct dirconn_entry *This, request_rec *r);
- static int proxy_match_word(struct dirconn_entry *This, request_rec *r);
-
- /* already called in the knowledge that the characters are hex digits */
- int ap_proxy_hex2c(const char *x)
- {
- int i, ch;
-
- #ifndef CHARSET_EBCDIC
- ch = x[0];
- if (ap_isdigit(ch))
- i = ch - '0';
- else if (ap_isupper(ch))
- i = ch - ('A' - 10);
- else
- i = ch - ('a' - 10);
- i <<= 4;
-
- ch = x[1];
- if (ap_isdigit(ch))
- i += ch - '0';
- else if (ap_isupper(ch))
- i += ch - ('A' - 10);
- else
- i += ch - ('a' - 10);
- return i;
- #else /*CHARSET_EBCDIC*/
- return (1 == sscanf(x, "%2x", &i)) ? os_toebcdic[i&0xFF] : 0;
- #endif /*CHARSET_EBCDIC*/
- }
-
- void ap_proxy_c2hex(int ch, char *x)
- {
- #ifndef CHARSET_EBCDIC
- int i;
-
- x[0] = '%';
- i = (ch & 0xF0) >> 4;
- if (i >= 10)
- x[1] = ('A' - 10) + i;
- else
- x[1] = '0' + i;
-
- i = ch & 0x0F;
- if (i >= 10)
- x[2] = ('A' - 10) + i;
- else
- x[2] = '0' + i;
- #else /*CHARSET_EBCDIC*/
- static const char ntoa[] = { "0123456789ABCDEF" };
- ch &= 0xFF;
- x[0] = '%';
- x[1] = ntoa[(os_toascii[ch]>>4)&0x0F];
- x[2] = ntoa[os_toascii[ch]&0x0F];
- x[3] = '\0';
- #endif /*CHARSET_EBCDIC*/
- }
-
- /*
- * canonicalise a URL-encoded string
- */
-
- /*
- * Convert a URL-encoded string to canonical form.
- * It decodes characters which need not be encoded,
- * and encodes those which must be encoded, and does not touch
- * those which must not be touched.
- */
- char *
- ap_proxy_canonenc(pool *p, const char *x, int len, enum enctype t, int isenc)
- {
- int i, j, ch;
- char *y;
- const char *allowed; /* characters which should not be encoded */
- const char *reserved; /* characters which much not be en/de-coded */
-
- /* N.B. in addition to :@&=, this allows ';' in an http path
- * and '?' in an ftp path -- this may be revised
- *
- * Also, it makes a '+' character in a search string reserved, as
- * it may be form-encoded. (Although RFC 1738 doesn't allow this -
- * it only permits ; / ? : @ = & as reserved chars.)
- */
- if (t == enc_path)
- allowed = "$-_.+!*'(),;:@&=";
- else if (t == enc_search)
- allowed = "$-_.!*'(),;:@&=";
- else if (t == enc_user)
- allowed = "$-_.+!*'(),;@&=";
- else if (t == enc_fpath)
- allowed = "$-_.+!*'(),?:@&=";
- else /* if (t == enc_parm) */
- allowed = "$-_.+!*'(),?/:@&=";
-
- if (t == enc_path)
- reserved = "/";
- else if (t == enc_search)
- reserved = "+";
- else
- reserved = "";
-
- y = ap_palloc(p, 3 * len + 1);
-
- for (i = 0, j = 0; i < len; i++, j++) {
- /* always handle '/' first */
- ch = x[i];
- if (strchr(reserved, ch)) {
- y[j] = ch;
- continue;
- }
- /* decode it if not already done */
- if (isenc && ch == '%') {
- if (!isxdigit(x[i + 1]) || !isxdigit(x[i + 2]))
- return NULL;
- ch = ap_proxy_hex2c(&x[i + 1]);
- i += 2;
- if (ch != 0 && strchr(reserved, ch)) { /* keep it encoded */
- ap_proxy_c2hex(ch, &y[j]);
- j += 2;
- continue;
- }
- }
- /* recode it, if necessary */
- if (!ap_isalnum(ch) && !strchr(allowed, ch)) {
- ap_proxy_c2hex(ch, &y[j]);
- j += 2;
- }
- else
- y[j] = ch;
- }
- y[j] = '\0';
- return y;
- }
-
- /*
- * Parses network-location.
- * urlp on input the URL; on output the path, after the leading /
- * user NULL if no user/password permitted
- * password holder for password
- * host holder for host
- * port port number; only set if one is supplied.
- *
- * Returns an error string.
- */
- char *
- ap_proxy_canon_netloc(pool *p, char **const urlp, char **userp,
- char **passwordp, char **hostp, int *port)
- {
- int i;
- char *strp, *host, *url = *urlp;
- char *user = NULL, *password = NULL;
-
- if (url[0] != '/' || url[1] != '/')
- return "Malformed URL";
- host = url + 2;
- url = strchr(host, '/');
- if (url == NULL)
- url = "";
- else
- *(url++) = '\0'; /* skip seperating '/' */
-
- /* find _last_ '@' since it might occur in user/password part */
- strp = strrchr(host, '@');
-
- if (strp != NULL) {
- *strp = '\0';
- user = host;
- host = strp + 1;
-
- /* find password */
- strp = strchr(user, ':');
- if (strp != NULL) {
- *strp = '\0';
- password = ap_proxy_canonenc(p, strp + 1, strlen(strp + 1), enc_user, 1);
- if (password == NULL)
- return "Bad %-escape in URL (password)";
- }
-
- user = ap_proxy_canonenc(p, user, strlen(user), enc_user, 1);
- if (user == NULL)
- return "Bad %-escape in URL (username)";
- }
- if (userp != NULL) {
- *userp = user;
- }
- if (passwordp != NULL) {
- *passwordp = password;
- }
-
- strp = strrchr(host, ':');
- if (strp != NULL) {
- *(strp++) = '\0';
-
- for (i = 0; strp[i] != '\0'; i++)
- if (!ap_isdigit(strp[i]))
- break;
-
- /* if (i == 0) the no port was given; keep default */
- if (strp[i] != '\0') {
- return "Bad port number in URL";
- } else if (i > 0) {
- *port = atoi(strp);
- if (*port > 65535)
- return "Port number in URL > 65535";
- }
- }
- ap_str_tolower(host); /* DNS names are case-insensitive */
- if (*host == '\0')
- return "Missing host in URL";
- /* check hostname syntax */
- for (i = 0; host[i] != '\0'; i++)
- if (!ap_isdigit(host[i]) && host[i] != '.')
- break;
- /* must be an IP address */
- #ifdef WIN32
- if (host[i] == '\0' && (inet_addr(host) == -1))
- #else
- if (host[i] == '\0' && (ap_inet_addr(host) == -1 || inet_network(host) == -1))
- #endif
- {
- return "Bad IP address in URL";
- }
-
- /* if (strchr(host,'.') == NULL && domain != NULL)
- host = pstrcat(p, host, domain, NULL);
- */
- *urlp = url;
- *hostp = host;
-
- return NULL;
- }
-
- static const char * const lwday[7] =
- {"Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"};
-
- /*
- * If the date is a valid RFC 850 date or asctime() date, then it
- * is converted to the RFC 1123 format, otherwise it is not modified.
- * This routine is not very fast at doing conversions, as it uses
- * sscanf and sprintf. However, if the date is already correctly
- * formatted, then it exits very quickly.
- */
- const char *
- ap_proxy_date_canon(pool *p, const char *x)
- {
- int wk, mday, year, hour, min, sec, mon;
- char *q, month[4], zone[4], week[4];
-
- q = strchr(x, ',');
- /* check for RFC 850 date */
- if (q != NULL && q - x > 3 && q[1] == ' ') {
- *q = '\0';
- for (wk = 0; wk < 7; wk++)
- if (strcmp(x, lwday[wk]) == 0)
- break;
- *q = ',';
- if (wk == 7)
- return x; /* not a valid date */
- if (q[4] != '-' || q[8] != '-' || q[11] != ' ' || q[14] != ':' ||
- q[17] != ':' || strcmp(&q[20], " GMT") != 0)
- return x;
- if (sscanf(q + 2, "%u-%3s-%u %u:%u:%u %3s", &mday, month, &year,
- &hour, &min, &sec, zone) != 7)
- return x;
- if (year < 70)
- year += 2000;
- else
- year += 1900;
- }
- else {
- /* check for acstime() date */
- if (x[3] != ' ' || x[7] != ' ' || x[10] != ' ' || x[13] != ':' ||
- x[16] != ':' || x[19] != ' ' || x[24] != '\0')
- return x;
- if (sscanf(x, "%3s %3s %u %u:%u:%u %u", week, month, &mday, &hour,
- &min, &sec, &year) != 7)
- return x;
- for (wk = 0; wk < 7; wk++)
- if (strcmp(week, ap_day_snames[wk]) == 0)
- break;
- if (wk == 7)
- return x;
- }
-
- /* check date */
- for (mon = 0; mon < 12; mon++)
- if (strcmp(month, ap_month_snames[mon]) == 0)
- break;
- if (mon == 12)
- return x;
-
- q = ap_palloc(p, 30);
- ap_snprintf(q, 30, "%s, %.2d %s %d %.2d:%.2d:%.2d GMT", ap_day_snames[wk], mday,
- ap_month_snames[mon], year, hour, min, sec);
- return q;
- }
-
-
- /* NOTE: This routine is taken from http_protocol::getline()
- * because the old code found in the proxy module was too
- * difficult to understand and maintain.
- */
- /* Get a line of protocol input, including any continuation lines
- * caused by MIME folding (or broken clients) if fold != 0, and place it
- * in the buffer s, of size n bytes, without the ending newline.
- *
- * Returns -1 on error, or the length of s.
- *
- * Note: Because bgets uses 1 char for newline and 1 char for NUL,
- * the most we can get is (n - 2) actual characters if it
- * was ended by a newline, or (n - 1) characters if the line
- * length exceeded (n - 1). So, if the result == (n - 1),
- * then the actual input line exceeded the buffer length,
- * and it would be a good idea for the caller to puke 400 or 414.
- */
- static int proxy_getline(char *s, int n, BUFF *in, int fold)
- {
- char *pos, next;
- int retval;
- int total = 0;
-
- pos = s;
-
- do {
- retval = ap_bgets(pos, n, in); /* retval == -1 if error, 0 if EOF */
-
- if (retval <= 0)
- return ((retval < 0) && (total == 0)) ? -1 : total;
-
- /* retval is the number of characters read, not including NUL */
-
- n -= retval; /* Keep track of how much of s is full */
- pos += (retval - 1); /* and where s ends */
- total += retval; /* and how long s has become */
-
- if (*pos == '\n') { /* Did we get a full line of input? */
- *pos = '\0';
- --total;
- ++n;
- }
- else
- return total; /* if not, input line exceeded buffer size */
-
- /* Continue appending if line folding is desired and
- * the last line was not empty and we have room in the buffer and
- * the next line begins with a continuation character.
- */
- } while (fold && (retval != 1) && (n > 1)
- && (ap_blookc(&next, in) == 1)
- && ((next == ' ') || (next == '\t')));
-
- return total;
- }
-
-
- /*
- * Reads headers from a buffer and returns an array of headers.
- * Returns NULL on file error
- * This routine tries to deal with too long lines and continuation lines.
- * @@@: XXX: FIXME: currently the headers are passed thru un-merged.
- * Is that okay, or should they be collapsed where possible?
- */
- table *ap_proxy_read_headers(request_rec *r, char *buffer, int size, BUFF *f)
- {
- table *resp_hdrs;
- int len;
- char *value, *end;
- char field[MAX_STRING_LEN];
-
- resp_hdrs = ap_make_table(r->pool, 20);
-
- /*
- * Read header lines until we get the empty separator line, a read error,
- * the connection closes (EOF), or we timeout.
- */
- while ((len = proxy_getline(buffer, size, f, 1)) > 0) {
-
- if (!(value = strchr(buffer, ':'))) { /* Find the colon separator */
-
- /* Buggy MS IIS servers sometimes return invalid headers
- * (an extra "HTTP/1.0 200, OK" line sprinkled in between
- * the usual MIME headers). Try to deal with it in a sensible
- * way, but log the fact.
- * XXX: The mask check is buggy if we ever see an HTTP/1.10 */
-
- if (!ap_checkmask(buffer, "HTTP/#.# ###*")) {
- /* Nope, it wasn't even an extra HTTP header. Give up. */
- return NULL;
- }
-
- ap_log_error(APLOG_MARK, APLOG_WARNING|APLOG_NOERRNO, r->server,
- "proxy: Ignoring duplicate HTTP header "
- "returned by %s (%s)", r->uri, r->method);
- continue;
- }
-
- *value = '\0';
- ++value;
- /* XXX: RFC2068 defines only SP and HT as whitespace, this test is
- * wrong... and so are many others probably.
- */
- while (ap_isspace(*value))
- ++value; /* Skip to start of value */
-
- /* should strip trailing whitespace as well */
- for (end = &value[strlen(value)-1]; end > value && ap_isspace(*end); --end)
- *end = '\0';
-
- ap_table_add(resp_hdrs, buffer, value);
-
- /* the header was too long; at the least we should skip extra data */
- if (len >= size - 1) {
- while ((len = proxy_getline(field, MAX_STRING_LEN, f, 1))
- >= MAX_STRING_LEN - 1) {
- /* soak up the extra data */
- }
- if (len == 0) /* time to exit the larger loop as well */
- break;
- }
- }
- return resp_hdrs;
- }
-
- long int ap_proxy_send_fb(BUFF *f, request_rec *r, cache_req *c)
- {
- int ok = 1;
- char buf[IOBUFSIZE];
- long total_bytes_rcv;
- register int n, o, w;
- conn_rec *con = r->connection;
- int alt_to = 1;
-
- total_bytes_rcv = 0;
- if (c)
- c->written = 0;
-
- #ifdef CHARSET_EBCDIC
- /* The cache copy is ASCII, not EBCDIC, even for text/html) */
- ap_bsetflag(f, B_ASCII2EBCDIC|B_EBCDIC2ASCII, 0);
- if (c != NULL && c->fp != NULL)
- ap_bsetflag(c->fp, B_ASCII2EBCDIC|B_EBCDIC2ASCII, 0);
- ap_bsetflag(con->client, B_ASCII2EBCDIC|B_EBCDIC2ASCII, 0);
- #endif
-
- /* Since we are reading from one buffer and writing to another,
- * it is unsafe to do a soft_timeout here, at least until the proxy
- * has its own timeout handler which can set both buffers to EOUT.
- */
-
- ap_kill_timeout(r);
-
- #ifdef WIN32
- /* works fine under win32, so leave it */
- ap_hard_timeout("proxy send body", r);
- alt_to = 0;
- #else
- /* CHECKME! Since hard_timeout won't work in unix on sends with partial
- * cache completion, we have to alternate between hard_timeout
- * for reads, and soft_timeout for send. This is because we need
- * to get a return from ap_bwrite to be able to continue caching.
- * BUT, if we *can't* continue anyway, just use hard_timeout.
- */
-
- if (c) {
- if (c->len <= 0 || c->cache_completion == 1) {
- ap_hard_timeout("proxy send body", r);
- alt_to = 0;
- }
- } else {
- ap_hard_timeout("proxy send body", r);
- alt_to = 0;
- }
- #endif
-
- while (ok) {
- if (alt_to)
- ap_hard_timeout("proxy send body", r);
-
- /* Read block from server */
- n = ap_bread(f, buf, IOBUFSIZE);
-
- if (alt_to)
- ap_kill_timeout(r);
- else
- ap_reset_timeout(r);
-
- if (n == -1) { /* input error */
- if (c != NULL)
- c = ap_proxy_cache_error(c);
- break;
- }
- if (n == 0)
- break; /* EOF */
- o = 0;
- total_bytes_rcv += n;
-
- /* Write to cache first. */
- if (c != NULL && c->fp != NULL) {
- if (ap_bwrite(c->fp, &buf[0], n) != n) {
- c = ap_proxy_cache_error(c);
- } else {
- c->written += n;
- }
- }
-
- /* Write the block to the client, detect aborted transfers */
- while (n && !con->aborted) {
- if (alt_to)
- ap_soft_timeout("proxy send body", r);
-
- w = ap_bwrite(con->client, &buf[o], n);
-
- if (alt_to)
- ap_kill_timeout(r);
- else
- ap_reset_timeout(r);
-
- if (w <= 0) {
- if (c != NULL && c->fp != NULL) {
- /* when a send failure occurs, we need to decide
- * whether to continue loading and caching the
- * document, or to abort the whole thing
- */
- ok = (c->len > 0) &&
- (c->cache_completion > 0) &&
- (c->len * c->cache_completion < total_bytes_rcv);
-
- if (! ok) {
- ap_pclosef(c->req->pool, c->fp->fd);
- c->fp = NULL;
- unlink(c->tempfile);
- c = NULL;
- }
- }
- con->aborted = 1;
- break;
- }
- n -= w;
- o += w;
- }
- }
-
- if (!con->aborted)
- ap_bflush(con->client);
-
- ap_kill_timeout(r);
- return total_bytes_rcv;
- }
-
- /*
- * Sends response line and headers. Uses the client fd and the
- * headers_out array from the passed request_rec to talk to the client
- * and to properly set the headers it sends for things such as logging.
- *
- * A timeout should be set before calling this routine.
- */
- void ap_proxy_send_headers(request_rec *r, const char *respline, table *t)
- {
- int i;
- BUFF *fp = r->connection->client;
- table_entry *elts = (table_entry *) ap_table_elts(t)->elts;
-
- ap_bputs(respline, fp);
- ap_bputs(CRLF, fp);
-
- for (i = 0; i < ap_table_elts(t)->nelts; ++i) {
- if (elts[i].key != NULL) {
- ap_bvputs(fp, elts[i].key, ": ", elts[i].val, CRLF, NULL);
- /* FIXME: @@@ This used to be ap_table_set(), but I think
- * ap_table_addn() is correct. MnKr */
- ap_table_addn(r->headers_out, elts[i].key, elts[i].val);
- }
- }
-
- ap_bputs(CRLF, fp);
- }
-
-
- /*
- * list is a comma-separated list of case-insensitive tokens, with
- * optional whitespace around the tokens.
- * The return returns 1 if the token val is found in the list, or 0
- * otherwise.
- */
- int ap_proxy_liststr(const char *list, const char *val)
- {
- int len, i;
- const char *p;
-
- len = strlen(val);
-
- while (list != NULL) {
- p = strchr(list, ',');
- if (p != NULL) {
- i = p - list;
- do
- p++;
- while (ap_isspace(*p));
- }
- else
- i = strlen(list);
-
- while (i > 0 && ap_isspace(list[i - 1]))
- i--;
- if (i == len && strncasecmp(list, val, len) == 0)
- return 1;
- list = p;
- }
- return 0;
- }
-
- #ifdef CASE_BLIND_FILESYSTEM
-
- /*
- * On some platforms, the file system is NOT case sensitive. So, a == A
- * need to map to smaller set of characters
- */
- void ap_proxy_hash(const char *it, char *val, int ndepth, int nlength)
- {
- AP_MD5_CTX context;
- unsigned char digest[16];
- char tmp[26];
- int i, k, d;
- unsigned int x;
- static const char enc_table[32] = "abcdefghijklmnopqrstuvwxyz012345";
-
- ap_MD5Init(&context);
- ap_MD5Update(&context, (const unsigned char *) it, strlen(it));
- ap_MD5Final(digest, &context);
-
- /* encode 128 bits as 26 characters, using a modified uuencoding */
- /* the encoding is 5 bytes -> 8 characters
- * i.e. 128 bits is 3 x 5 bytes + 1 byte -> 3 * 8 characters + 2 characters
- */
- for (i = 0, k = 0; i < 15; i += 5) {
- x = (digest[i] << 24) | (digest[i + 1] << 16) | (digest[i + 2] << 8) | digest[i + 3];
- tmp[k++] = enc_table[x >> 27];
- tmp[k++] = enc_table[(x >> 22) & 0x1f];
- tmp[k++] = enc_table[(x >> 17) & 0x1f];
- tmp[k++] = enc_table[(x >> 12) & 0x1f];
- tmp[k++] = enc_table[(x >> 7) & 0x1f];
- tmp[k++] = enc_table[(x >> 2) & 0x1f];
- x = ((x & 0x3) << 8) | digest[i + 4];
- tmp[k++] = enc_table[x >> 5];
- tmp[k++] = enc_table[x & 0x1f];
- }
- /* one byte left */
- x = digest[15];
- tmp[k++] = enc_table[x >> 3]; /* use up 5 bits */
- tmp[k++] = enc_table[x & 0x7];
- /* now split into directory levels */
-
- for (i = k = d = 0; d < ndepth; ++d) {
- memcpy(&val[i], &tmp[k], nlength);
- k += nlength;
- val[i + nlength] = '/';
- i += nlength + 1;
- }
- memcpy(&val[i], &tmp[k], 26 - k);
- val[i + 26 - k] = '\0';
- }
-
- #else
-
- void ap_proxy_hash(const char *it, char *val, int ndepth, int nlength)
- {
- AP_MD5_CTX context;
- unsigned char digest[16];
- char tmp[22];
- int i, k, d;
- unsigned int x;
- #if defined(AIX) && defined(__ps2__)
- /* Believe it or not, AIX 1.x does not allow you to name a file '@',
- * so hack around it in the encoding. */
- static const char enc_table[64] =
- "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789_%";
- #else
- static const char enc_table[64] =
- "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789_@";
- #endif
-
- ap_MD5Init(&context);
- ap_MD5Update(&context, (const unsigned char *) it, strlen(it));
- ap_MD5Final(digest, &context);
-
- /* encode 128 bits as 22 characters, using a modified uuencoding */
- /* the encoding is 3 bytes -> 4 characters
- * i.e. 128 bits is 5 x 3 bytes + 1 byte -> 5 * 4 characters + 2 characters
- */
- for (i = 0, k = 0; i < 15; i += 3) {
- x = (digest[i] << 16) | (digest[i + 1] << 8) | digest[i + 2];
- tmp[k++] = enc_table[x >> 18];
- tmp[k++] = enc_table[(x >> 12) & 0x3f];
- tmp[k++] = enc_table[(x >> 6) & 0x3f];
- tmp[k++] = enc_table[x & 0x3f];
- }
- /* one byte left */
- x = digest[15];
- tmp[k++] = enc_table[x >> 2]; /* use up 6 bits */
- tmp[k++] = enc_table[(x << 4) & 0x3f];
- /* now split into directory levels */
-
- for (i = k = d = 0; d < ndepth; ++d) {
- memcpy(&val[i], &tmp[k], nlength);
- k += nlength;
- val[i + nlength] = '/';
- i += nlength + 1;
- }
- memcpy(&val[i], &tmp[k], 22 - k);
- val[i + 22 - k] = '\0';
- }
-
- #endif /* CASE_BLIND_FILESYSTEM */
-
- /*
- * Converts 8 hex digits to a time integer
- */
- int ap_proxy_hex2sec(const char *x)
- {
- int i, ch;
- unsigned int j;
-
- for (i = 0, j = 0; i < 8; i++) {
- ch = x[i];
- j <<= 4;
- if (ap_isdigit(ch))
- j |= ch - '0';
- else if (ap_isupper(ch))
- j |= ch - ('A' - 10);
- else
- j |= ch - ('a' - 10);
- }
- if (j == 0xffffffff)
- return -1; /* so that it works with 8-byte ints */
- else
- return j;
- }
-
- /*
- * Converts a time integer to 8 hex digits
- */
- void ap_proxy_sec2hex(int t, char *y)
- {
- int i, ch;
- unsigned int j = t;
-
- for (i = 7; i >= 0; i--) {
- ch = j & 0xF;
- j >>= 4;
- if (ch >= 10)
- y[i] = ch + ('A' - 10);
- else
- y[i] = ch + '0';
- }
- y[8] = '\0';
- }
-
-
- cache_req *ap_proxy_cache_error(cache_req *c)
- {
- ap_log_rerror(APLOG_MARK, APLOG_ERR, c->req,
- "proxy: error writing to cache file %s", c->tempfile);
- ap_pclosef(c->req->pool, c->fp->fd);
- c->fp = NULL;
- unlink(c->tempfile);
- return NULL;
- }
-
- int ap_proxyerror(request_rec *r, const char *message)
- {
- ap_table_setn(r->notes, "error-notes",
- ap_pstrcat(r->pool,
- "The proxy server could not handle the request "
- "<EM><A HREF=\"", r->uri, "\">",
- r->method, " ", r->uri, "</A></EM>.<P>\n"
- "Reason: <STRONG>", message, "</STRONG>", NULL));
- r->status_line = "500 Proxy Error";
- return HTTP_INTERNAL_SERVER_ERROR;
- }
-
- /*
- * This routine returns its own error message
- */
- const char *
- ap_proxy_host2addr(const char *host, struct hostent *reqhp)
- {
- int i;
- struct hostent *hp;
- static APACHE_TLS struct hostent hpbuf;
- static APACHE_TLS u_long ipaddr;
- static APACHE_TLS char *charpbuf[2];
-
- for (i = 0; host[i] != '\0'; i++)
- if (!ap_isdigit(host[i]) && host[i] != '.')
- break;
-
- if (host[i] != '\0') {
- hp = gethostbyname(host);
- if (hp == NULL)
- return "Host not found";
- }
- else {
- ipaddr = ap_inet_addr(host);
- hp = gethostbyaddr((char *) &ipaddr, sizeof(u_long), AF_INET);
- if (hp == NULL) {
- memset(&hpbuf, 0, sizeof(hpbuf));
- hpbuf.h_name = 0;
- hpbuf.h_addrtype = AF_INET;
- hpbuf.h_length = sizeof(u_long);
- hpbuf.h_addr_list = charpbuf;
- hpbuf.h_addr_list[0] = (char *) &ipaddr;
- hpbuf.h_addr_list[1] = 0;
- hp = &hpbuf;
- }
- }
- *reqhp = *hp;
- return NULL;
- }
-
- static const char *
- proxy_get_host_of_request(request_rec *r)
- {
- char *url, *user = NULL, *password = NULL, *err, *host;
- int port = -1;
-
- if (r->hostname != NULL)
- return r->hostname;
-
- /* Set url to the first char after "scheme://" */
- if ((url = strchr(r->uri, ':')) == NULL
- || url[1] != '/' || url[2] != '/')
- return NULL;
-
- url = ap_pstrdup(r->pool, &url[1]); /* make it point to "//", which is what proxy_canon_netloc expects */
-
- err = ap_proxy_canon_netloc(r->pool, &url, &user, &password, &host, &port);
-
- if (err != NULL)
- ap_log_rerror(APLOG_MARK, APLOG_ERR|APLOG_NOERRNO, r,
- "%s", err);
-
- r->hostname = host;
-
- return host; /* ought to return the port, too */
- }
-
- /* Return TRUE if addr represents an IP address (or an IP network address) */
- int ap_proxy_is_ipaddr(struct dirconn_entry *This, pool *p)
- {
- const char *addr = This->name;
- long ip_addr[4];
- int i, quads;
- long bits;
-
- /* if the address is given with an explicit netmask, use that */
- /* Due to a deficiency in ap_inet_addr(), it is impossible to parse */
- /* "partial" addresses (with less than 4 quads) correctly, i.e. */
- /* 192.168.123 is parsed as 192.168.0.123, which is not what I want. */
- /* I therefore have to parse the IP address manually: */
- /*if (proxy_readmask(This->name, &This->addr.s_addr, &This->mask.s_addr) == 0) */
- /* addr and mask were set by proxy_readmask() */
- /*return 1; */
-
- /* Parse IP addr manually, optionally allowing */
- /* abbreviated net addresses like 192.168. */
-
- /* Iterate over up to 4 (dotted) quads. */
- for (quads = 0; quads < 4 && *addr != '\0'; ++quads) {
- char *tmp;
-
- if (*addr == '/' && quads > 0) /* netmask starts here. */
- break;
-
- if (!ap_isdigit(*addr))
- return 0; /* no digit at start of quad */
-
- ip_addr[quads] = strtol(addr, &tmp, 0);
-
- if (tmp == addr) /* expected a digit, found something else */
- return 0;
-
- if (ip_addr[quads] < 0 || ip_addr[quads] > 255) {
- /* invalid octet */
- return 0;
- }
-
- addr = tmp;
-
- if (*addr == '.' && quads != 3)
- ++addr; /* after the 4th quad, a dot would be illegal */
- }
-
- for (This->addr.s_addr = 0, i = 0; i < quads; ++i)
- This->addr.s_addr |= htonl(ip_addr[i] << (24 - 8 * i));
-
- if (addr[0] == '/' && ap_isdigit(addr[1])) { /* net mask follows: */
- char *tmp;
-
- ++addr;
-
- bits = strtol(addr, &tmp, 0);
-
- if (tmp == addr) /* expected a digit, found something else */
- return 0;
-
- addr = tmp;
-
- if (bits < 0 || bits > 32) /* netmask must be between 0 and 32 */
- return 0;
-
- }
- else {
- /* Determine (i.e., "guess") netmask by counting the */
- /* number of trailing .0's; reduce #quads appropriately */
- /* (so that 192.168.0.0 is equivalent to 192.168.) */
- while (quads > 0 && ip_addr[quads - 1] == 0)
- --quads;
-
- /* "IP Address should be given in dotted-quad form, optionally followed by a netmask (e.g., 192.168.111.0/24)"; */
- if (quads < 1)
- return 0;
-
- /* every zero-byte counts as 8 zero-bits */
- bits = 8 * quads;
-
- if (bits != 32) /* no warning for fully qualified IP address */
- fprintf(stderr, "Warning: NetMask not supplied with IP-Addr; guessing: %s/%ld\n",
- inet_ntoa(This->addr), bits);
- }
-
- This->mask.s_addr = htonl(INADDR_NONE << (32 - bits));
-
- if (*addr == '\0' && (This->addr.s_addr & ~This->mask.s_addr) != 0) {
- fprintf(stderr, "Warning: NetMask and IP-Addr disagree in %s/%ld\n",
- inet_ntoa(This->addr), bits);
- This->addr.s_addr &= This->mask.s_addr;
- fprintf(stderr, " Set to %s/%ld\n",
- inet_ntoa(This->addr), bits);
- }
-
- if (*addr == '\0') {
- This->matcher = proxy_match_ipaddr;
- return 1;
- }
- else
- return (*addr == '\0'); /* okay iff we've parsed the whole string */
- }
-
- /* Return TRUE if addr represents an IP address (or an IP network address) */
- static int proxy_match_ipaddr(struct dirconn_entry *This, request_rec *r)
- {
- int i;
- int ip_addr[4];
- struct in_addr addr;
- struct in_addr *ip_list;
- char **ip_listptr;
- const char *found;
- const char *host = proxy_get_host_of_request(r);
-
- if (host == NULL) /* oops! */
- return 0;
-
- memset(&addr, '\0', sizeof addr);
- memset(ip_addr, '\0', sizeof ip_addr);
-
- if (4 == sscanf(host, "%d.%d.%d.%d", &ip_addr[0], &ip_addr[1], &ip_addr[2], &ip_addr[3])) {
- for (addr.s_addr = 0, i = 0; i < 4; ++i)
- addr.s_addr |= htonl(ip_addr[i] << (24 - 8 * i));
-
- if (This->addr.s_addr == (addr.s_addr & This->mask.s_addr)) {
- #if DEBUGGING
- fprintf(stderr, "1)IP-Match: %s[%s] <-> ", host, inet_ntoa(addr));
- fprintf(stderr, "%s/", inet_ntoa(This->addr));
- fprintf(stderr, "%s\n", inet_ntoa(This->mask));
- #endif
- return 1;
- }
- #if DEBUGGING
- else {
- fprintf(stderr, "1)IP-NoMatch: %s[%s] <-> ", host, inet_ntoa(addr));
- fprintf(stderr, "%s/", inet_ntoa(This->addr));
- fprintf(stderr, "%s\n", inet_ntoa(This->mask));
- }
- #endif
- }
- else {
- struct hostent the_host;
-
- memset(&the_host, '\0', sizeof the_host);
- found = ap_proxy_host2addr(host, &the_host);
-
- if (found != NULL) {
- #if DEBUGGING
- fprintf(stderr, "2)IP-NoMatch: hostname=%s msg=%s\n", host, found);
- #endif
- return 0;
- }
-
- if (the_host.h_name != NULL)
- found = the_host.h_name;
- else
- found = host;
-
- /* Try to deal with multiple IP addr's for a host */
- for (ip_listptr = the_host.h_addr_list; *ip_listptr; ++ip_listptr) {
- ip_list = (struct in_addr *) *ip_listptr;
- if (This->addr.s_addr == (ip_list->s_addr & This->mask.s_addr)) {
- #if DEBUGGING
- fprintf(stderr, "3)IP-Match: %s[%s] <-> ", found, inet_ntoa(*ip_list));
- fprintf(stderr, "%s/", inet_ntoa(This->addr));
- fprintf(stderr, "%s\n", inet_ntoa(This->mask));
- #endif
- return 1;
- }
- #if DEBUGGING
- else {
- fprintf(stderr, "3)IP-NoMatch: %s[%s] <-> ", found, inet_ntoa(*ip_list));
- fprintf(stderr, "%s/", inet_ntoa(This->addr));
- fprintf(stderr, "%s\n", inet_ntoa(This->mask));
- }
- #endif
- }
- }
-
- return 0;
- }
-
- /* Return TRUE if addr represents a domain name */
- int ap_proxy_is_domainname(struct dirconn_entry *This, pool *p)
- {
- char *addr = This->name;
- int i;
-
- /* Domain name must start with a '.' */
- if (addr[0] != '.')
- return 0;
-
- /* rfc1035 says DNS names must consist of "[-a-zA-Z0-9]" and '.' */
- for (i = 0; ap_isalnum(addr[i]) || addr[i] == '-' || addr[i] == '.'; ++i)
- continue;
-
- #if 0
- if (addr[i] == ':') {
- fprintf(stderr, "@@@@ handle optional port in proxy_is_domainname()\n");
- /* @@@@ handle optional port */
- }
- #endif
-
- if (addr[i] != '\0')
- return 0;
-
- /* Strip trailing dots */
- for (i = strlen(addr) - 1; i > 0 && addr[i] == '.'; --i)
- addr[i] = '\0';
-
- This->matcher = proxy_match_domainname;
- return 1;
- }
-
- /* Return TRUE if host "host" is in domain "domain" */
- static int proxy_match_domainname(struct dirconn_entry *This, request_rec *r)
- {
- const char *host = proxy_get_host_of_request(r);
- int d_len = strlen(This->name), h_len;
-
- if (host == NULL) /* some error was logged already */
- return 0;
-
- h_len = strlen(host);
-
- /* @@@ do this within the setup? */
- /* Ignore trailing dots in domain comparison: */
- while (d_len > 0 && This->name[d_len - 1] == '.')
- --d_len;
- while (h_len > 0 && host[h_len - 1] == '.')
- --h_len;
- return h_len > d_len
- && strncasecmp(&host[h_len - d_len], This->name, d_len) == 0;
- }
-
- /* Return TRUE if addr represents a host name */
- int ap_proxy_is_hostname(struct dirconn_entry *This, pool *p)
- {
- struct hostent host;
- char *addr = This->name;
- int i;
-
- /* Host names must not start with a '.' */
- if (addr[0] == '.')
- return 0;
-
- /* rfc1035 says DNS names must consist of "[-a-zA-Z0-9]" and '.' */
- for (i = 0; ap_isalnum(addr[i]) || addr[i] == '-' || addr[i] == '.'; ++i);
-
- #if 0
- if (addr[i] == ':') {
- fprintf(stderr, "@@@@ handle optional port in proxy_is_hostname()\n");
- /* @@@@ handle optional port */
- }
- #endif
-
- if (addr[i] != '\0' || ap_proxy_host2addr(addr, &host) != NULL)
- return 0;
-
- This->hostentry = ap_pduphostent (p, &host);
-
- /* Strip trailing dots */
- for (i = strlen(addr) - 1; i > 0 && addr[i] == '.'; --i)
- addr[i] = '\0';
-
- This->matcher = proxy_match_hostname;
- return 1;
- }
-
- /* Return TRUE if host "host" is equal to host2 "host2" */
- static int proxy_match_hostname(struct dirconn_entry *This, request_rec *r)
- {
- char *host = This->name;
- const char *host2 = proxy_get_host_of_request(r);
- int h2_len;
- int h1_len;
-
- if (host == NULL || host2 == NULL)
- return 0; /* oops! */
-
- h2_len = strlen(host2);
- h1_len = strlen(host);
-
- #if 0
- unsigned long *ip_list;
-
- /* Try to deal with multiple IP addr's for a host */
- for (ip_list = *This->hostentry->h_addr_list; *ip_list != 0UL; ++ip_list)
- if (*ip_list == ? ? ? ? ? ? ? ? ? ? ? ? ?)
- return 1;
- #endif
-
- /* Ignore trailing dots in host2 comparison: */
- while (h2_len > 0 && host2[h2_len - 1] == '.')
- --h2_len;
- while (h1_len > 0 && host[h1_len - 1] == '.')
- --h1_len;
- return h1_len == h2_len
- && strncasecmp(host, host2, h1_len) == 0;
- }
-
- /* Return TRUE if addr is to be matched as a word */
- int ap_proxy_is_word(struct dirconn_entry *This, pool *p)
- {
- This->matcher = proxy_match_word;
- return 1;
- }
-
- /* Return TRUE if string "str2" occurs literally in "str1" */
- static int proxy_match_word(struct dirconn_entry *This, request_rec *r)
- {
- const char *host = proxy_get_host_of_request(r);
- return host != NULL && strstr(host, This->name) != NULL;
- }
-
- int ap_proxy_doconnect(int sock, struct sockaddr_in *addr, request_rec *r)
- {
- int i;
-
- ap_hard_timeout("proxy connect", r);
- do {
- i = connect(sock, (struct sockaddr *) addr, sizeof(struct sockaddr_in));
- #ifdef WIN32
- if (i == SOCKET_ERROR)
- errno = WSAGetLastError();
- #endif /* WIN32 */
- } while (i == -1 && errno == EINTR);
- if (i == -1) {
- ap_log_rerror(APLOG_MARK, APLOG_ERR, r,
- "proxy connect to %s port %d failed",
- inet_ntoa(addr->sin_addr), ntohs(addr->sin_port));
- }
- ap_kill_timeout(r);
-
- return i;
- }
-
- /* This function is called by ap_table_do() for all header lines */
- /* (from proxy_http.c and proxy_ftp.c) */
- /* It is passed a table_do_args struct pointer and a MIME field and value pair */
- int ap_proxy_send_hdr_line(void *p, const char *key, const char *value)
- {
- struct tbl_do_args *parm = (struct tbl_do_args *)p;
-
- if (key == NULL || value == NULL || value[0] == '\0')
- return 1;
- if (!parm->req->assbackwards)
- ap_rvputs(parm->req, key, ": ", value, CRLF, NULL);
- if (parm->cache != NULL && parm->cache->fp != NULL &&
- ap_bvputs(parm->cache->fp, key, ": ", value, CRLF, NULL) == -1)
- parm->cache = ap_proxy_cache_error(parm->cache);
- return 1; /* tell ap_table_do() to continue calling us for more headers */
- }
-
- /* send a text line to one or two BUFF's; return line length */
- unsigned ap_proxy_bputs2(const char *data, BUFF *client, cache_req *cache)
- {
- unsigned len = ap_bputs(data, client);
- if (cache != NULL && cache->fp != NULL)
- ap_bputs(data, cache->fp);
- return len;
- }
-
-