/* Licensed to the Apache Software Foundation (ASF) under one or more

* contributor license agreements. See the NOTICE file distributed with

* this work for additional information regarding copyright ownership.

* The ASF licenses this file to You under the Apache License, Version 2.0

* (the "License"); you may not use this file except in compliance with

* the License. You may obtain a copy of the License at

*

* http://www.apache.org/licenses/LICENSE-2.0

*

* Unless required by applicable law or agreed to in writing, software

* distributed under the License is distributed on an "AS IS" BASIS,

* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

* See the License for the specific language governing permissions and

* limitations under the License.

*/

/* Utility routines for Apache proxy */

#include "mod_proxy.h"

#include "ap_mpm.h"

#include "scoreboard.h"

#include "apr_version.h"

#if APR_HAVE_UNISTD_H

#include <unistd.h> /* for getpid() */

#endif

#if (APR_MAJOR_VERSION < 1)

#undef apr_socket_create

#define apr_socket_create apr_socket_create_ex

#endif

/* Global balancer counter */

int PROXY_DECLARE_DATA proxy_lb_workers = 0;

static int lb_workers_limit = 0;

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);

APR_IMPLEMENT_OPTIONAL_HOOK_RUN_ALL(proxy, PROXY, int, create_req,

(request_rec *r, request_rec *pr), (r, pr),

OK, DECLINED)

/* already called in the knowledge that the characters are hex digits */

PROXY_DECLARE(int) ap_proxy_hex2c(const char *x)

{

int i, ch;

#if !APR_CHARSET_EBCDIC

ch = x[0];

if (apr_isdigit(ch)) {

i = ch - '0';

}

else if (apr_isupper(ch)) {

i = ch - ('A' - 10);

}

else {

i = ch - ('a' - 10);

}

i <<= 4;

ch = x[1];

if (apr_isdigit(ch)) {

i += ch - '0';

}

else if (apr_isupper(ch)) {

i += ch - ('A' - 10);

}

else {

i += ch - ('a' - 10);

}

return i;

#else /*APR_CHARSET_EBCDIC*/

/*

* we assume that the hex value refers to an ASCII character

* so convert to EBCDIC so that it makes sense locally;

*

* example:

*

* client specifies %20 in URL to refer to a space char;

* at this point we're called with EBCDIC "20"; after turning

* EBCDIC "20" into binary 0x20, we then need to assume that 0x20

* represents an ASCII char and convert 0x20 to EBCDIC, yielding

* 0x40

*/

char buf[1];

if (1 == sscanf(x, "%2x", &i)) {

buf[0] = i & 0xFF;

ap_xlate_proto_from_ascii(buf, 1);

return buf[0];

}

else {

return 0;

}

#endif /*APR_CHARSET_EBCDIC*/

}

PROXY_DECLARE(void) ap_proxy_c2hex(int ch, char *x)

{

#if !APR_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 /*APR_CHARSET_EBCDIC*/

static const char ntoa[] = { "0123456789ABCDEF" };

char buf[1];

ch &= 0xFF;

buf[0] = ch;

ap_xlate_proto_to_ascii(buf, 1);

x[0] = '%';

x[1] = ntoa[(buf[0] >> 4) & 0x0F];

x[2] = ntoa[buf[0] & 0x0F];

x[3] = '\0';

#endif /*APR_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.

*/

PROXY_DECLARE(char *)ap_proxy_canonenc(apr_pool_t *p, const char *x, int len,

enum enctype t, int forcedec,

int proxyreq)

{

int i, j, ch;

char *y;

char *allowed; /* characters which should not be encoded */

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 = apr_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. do not decode reverse proxied URLs

* unless specifically forced

*/

if ((forcedec || (proxyreq && proxyreq != PROXYREQ_REVERSE)) && ch == '%') {

if (!apr_isxdigit(x[i + 1]) || !apr_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 (!apr_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.

*/

PROXY_DECLARE(char *)

ap_proxy_canon_netloc(apr_pool_t *p, char **const urlp, char **userp,

char **passwordp, char **hostp, apr_port_t *port)

{

char *addr, *scope_id, *strp, *host, *url = *urlp;

char *user = NULL, *password = NULL;

apr_port_t tmp_port;

apr_status_t rv;

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, 0);

if (password == NULL) {

return "Bad %-escape in URL (password)";

}

}

user = ap_proxy_canonenc(p, user, strlen(user), enc_user, 1, 0);

if (user == NULL) {

return "Bad %-escape in URL (username)";

}

}

if (userp != NULL) {

*userp = user;

}

if (passwordp != NULL) {

*passwordp = password;

}

/*

* Parse the host string to separate host portion from optional port.

* Perform range checking on port.

*/

rv = apr_parse_addr_port(&addr, &scope_id, &tmp_port, host, p);

if (rv != APR_SUCCESS || addr == NULL || scope_id != NULL) {

return "Invalid host/port";

}

if (tmp_port != 0) { /* only update caller's port if port was specified */

*port = tmp_port;

}

ap_str_tolower(addr); /* DNS names are case-insensitive */

*urlp = url;

*hostp = addr;

return NULL;

}

/*

* If the date is a valid RFC 850 date or asctime() date, then it

* is converted to the RFC 1123 format.

*/

PROXY_DECLARE(const char *)

ap_proxy_date_canon(apr_pool_t *p, const char *date)

{

apr_status_t rv;

char* ndate;

apr_time_t time = apr_date_parse_http(date);

if (!time) {

return date;

}

ndate = apr_palloc(p, APR_RFC822_DATE_LEN);

rv = apr_rfc822_date(ndate, time);

if (rv != APR_SUCCESS) {

return date;

}

return ndate;

}

PROXY_DECLARE(request_rec *)ap_proxy_make_fake_req(conn_rec *c, request_rec *r)

{

request_rec *rp = apr_pcalloc(r->pool, sizeof(*r));

rp->pool = r->pool;

rp->status = HTTP_OK;

rp->headers_in = apr_table_make(r->pool, 50);

rp->subprocess_env = apr_table_make(r->pool, 50);

rp->headers_out = apr_table_make(r->pool, 12);

rp->err_headers_out = apr_table_make(r->pool, 5);

rp->notes = apr_table_make(r->pool, 5);

rp->server = r->server;

rp->proxyreq = r->proxyreq;

rp->request_time = r->request_time;

rp->connection = c;

rp->output_filters = c->output_filters;

rp->input_filters = c->input_filters;

rp->proto_output_filters = c->output_filters;

rp->proto_input_filters = c->input_filters;

rp->request_config = ap_create_request_config(r->pool);

proxy_run_create_req(r, rp);

return rp;

}

/*

* 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.

*/

PROXY_DECLARE(int) ap_proxy_liststr(const char *list, const char *val)

{

int len, i;

const char *p;

len = strlen(val);

while (list != NULL) {

p = ap_strchr_c(list, ',');

if (p != NULL) {

i = p - list;

do {

p++;

} while (apr_isspace(*p));

}

else {

i = strlen(list);

}

while (i > 0 && apr_isspace(list[i - 1])) {

i--;

}

if (i == len && strncasecmp(list, val, len) == 0) {

return 1;

}

list = p;

}

return 0;

}

/*

* list is a comma-separated list of case-insensitive tokens, with

* optional whitespace around the tokens.

* if val appears on the list of tokens, it is removed from the list,

* and the new list is returned.

*/

PROXY_DECLARE(char *)ap_proxy_removestr(apr_pool_t *pool, const char *list, const char *val)

{

int len, i;

const char *p;

char *new = NULL;

len = strlen(val);

while (list != NULL) {

p = ap_strchr_c(list, ',');

if (p != NULL) {

i = p - list;

do {

p++;

} while (apr_isspace(*p));

}

else {

i = strlen(list);

}

while (i > 0 && apr_isspace(list[i - 1])) {

i--;

}

if (i == len && strncasecmp(list, val, len) == 0) {

/* do nothing */

}

else {

if (new) {

new = apr_pstrcat(pool, new, ",", apr_pstrndup(pool, list, i), NULL);

}

else {

new = apr_pstrndup(pool, list, i);

}

}

list = p;

}

return new;

}

/*

* Converts 8 hex digits to a time integer

*/

PROXY_DECLARE(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 (apr_isdigit(ch)) {

j |= ch - '0';

}

else if (apr_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

*/

PROXY_DECLARE(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';

}

PROXY_DECLARE(int) ap_proxyerror(request_rec *r, int statuscode, const char *message)

{

apr_table_setn(r->notes, "error-notes",

apr_pstrcat(r->pool,

"The proxy server could not handle the request "

"<em><a href=\"", ap_escape_html(r->pool, r->uri),

"\">", ap_escape_html(r->pool, r->method),

"&nbsp;",

ap_escape_html(r->pool, r->uri), "</a></em>.<p>\n"

"Reason: <strong>",

ap_escape_html(r->pool, message),

"</strong></p>", NULL));

/* Allow "error-notes" string to be printed by ap_send_error_response() */

apr_table_setn(r->notes, "verbose-error-to", apr_pstrdup(r->pool, "*"));

r->status_line = apr_psprintf(r->pool, "%3.3u Proxy Error", statuscode);

ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r,

"proxy: %s returned by %s", message, r->uri);

return statuscode;

}

static const char *

proxy_get_host_of_request(request_rec *r)

{

char *url, *user = NULL, *password = NULL, *err, *host;

apr_port_t port;

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 = apr_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, 0, 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) */

PROXY_DECLARE(int) ap_proxy_is_ipaddr(struct dirconn_entry *This, apr_pool_t *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 apr_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 (!apr_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] == '/' && apr_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 */

ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, NULL,

"Warning: NetMask not supplied with IP-Addr; guessing: %s/%ld",

inet_ntoa(This->addr), bits);

}

}

This->mask.s_addr = htonl(APR_INADDR_NONE << (32 - bits));

if (*addr == '\0' && (This->addr.s_addr & ~This->mask.s_addr) != 0) {

ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, NULL,

"Warning: NetMask and IP-Addr disagree in %s/%ld",

inet_ntoa(This->addr), bits);

This->addr.s_addr &= This->mask.s_addr;

ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, NULL,

" Set to %s/%ld", 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, ip_addr[4];

struct in_addr addr, *ip;

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) {

/* ap_proxy_is_ipaddr() already confirmed that we have

* a valid octet in ip_addr[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

ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, NULL,

"1)IP-Match: %s[%s] <-> ", host, inet_ntoa(addr));

ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, NULL,

"%s/", inet_ntoa(This->addr));

ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, NULL,

"%s", inet_ntoa(This->mask));

#endif

return 1;

}

#if DEBUGGING

else {

ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, NULL,

"1)IP-NoMatch: %s[%s] <-> ", host, inet_ntoa(addr));

ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, NULL,

"%s/", inet_ntoa(This->addr));

ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, NULL,

"%s", inet_ntoa(This->mask));

}

#endif

}

else {

struct apr_sockaddr_t *reqaddr;

if (apr_sockaddr_info_get(&reqaddr, host, APR_UNSPEC, 0, 0, r->pool)

!= APR_SUCCESS) {

#if DEBUGGING

ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, NULL,

"2)IP-NoMatch: hostname=%s msg=Host not found", host);

#endif

return 0;

}

/* Try to deal with multiple IP addr's for a host */

/* FIXME: This needs to be able to deal with IPv6 */

while (reqaddr) {

ip = (struct in_addr *) reqaddr->ipaddr_ptr;

if (This->addr.s_addr == (ip->s_addr & This->mask.s_addr)) {

#if DEBUGGING

ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, NULL,

"3)IP-Match: %s[%s] <-> ", host, inet_ntoa(*ip));

ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, NULL,

"%s/", inet_ntoa(This->addr));

ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, NULL,

"%s", inet_ntoa(This->mask));

#endif

return 1;

}

#if DEBUGGING

else {

ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, NULL,

"3)IP-NoMatch: %s[%s] <-> ", host, inet_ntoa(*ip));

ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, NULL,

"%s/", inet_ntoa(This->addr));

ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, NULL,

"%s", inet_ntoa(This->mask));

}

#endif

reqaddr = reqaddr->next;

}

}

return 0;

}

/* Return TRUE if addr represents a domain name */

PROXY_DECLARE(int) ap_proxy_is_domainname(struct dirconn_entry *This, apr_pool_t *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; apr_isalnum(addr[i]) || addr[i] == '-' || addr[i] == '.'; ++i) {

continue;

}

#if 0

if (addr[i] == ':') {

ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, NULL,

"@@@@ handle optional port in proxy_is_domainname()");

/* @@@@ 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 host represents a host name */

PROXY_DECLARE(int) ap_proxy_is_hostname(struct dirconn_entry *This, apr_pool_t *p)

{

struct apr_sockaddr_t *addr;

char *host = This->name;

int i;

/* Host names must not start with a '.' */

if (host[0] == '.') {

return 0;

}

/* rfc1035 says DNS names must consist of "[-a-zA-Z0-9]" and '.' */

for (i = 0; apr_isalnum(host[i]) || host[i] == '-' || host[i] == '.'; ++i);

if (host[i] != '\0' || apr_sockaddr_info_get(&addr, host, APR_UNSPEC, 0, 0, p) != APR_SUCCESS) {

return 0;

}

This->hostaddr = addr;

/* Strip trailing dots */

for (i = strlen(host) - 1; i > 0 && host[i] == '.'; --i) {

host[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

struct apr_sockaddr_t *addr = *This->hostaddr;

/* Try to deal with multiple IP addr's for a host */

while (addr) {

if (addr->ipaddr_ptr == ? ? ? ? ? ? ? ? ? ? ? ? ?)

return 1;

addr = addr->next;

}

#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 */

PROXY_DECLARE(int) ap_proxy_is_word(struct dirconn_entry *This, apr_pool_t *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 && ap_strstr_c(host, This->name) != NULL;

}

/* checks whether a host in uri_addr matches proxyblock */

PROXY_DECLARE(int) ap_proxy_checkproxyblock(request_rec *r, proxy_server_conf *conf,

apr_sockaddr_t *uri_addr)

{

int j;

apr_sockaddr_t * src_uri_addr = uri_addr;

/* XXX FIXME: conf->noproxies->elts is part of an opaque structure */

for (j = 0; j < conf->noproxies->nelts; j++) {

struct noproxy_entry *npent = (struct noproxy_entry *) conf->noproxies->elts;

struct apr_sockaddr_t *conf_addr = npent[j].addr;

uri_addr = src_uri_addr;

ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, r->server,

"proxy: checking remote machine [%s] against [%s]", uri_addr->hostname, npent[j].name);

if ((npent[j].name && ap_strstr_c(uri_addr->hostname, npent[j].name))

|| npent[j].name[0] == '*') {

ap_log_error(APLOG_MARK, APLOG_WARNING, 0, r->server,

"proxy: connect to remote machine %s blocked: name %s matched", uri_addr->hostname, npent[j].name);

return HTTP_FORBIDDEN;

}

while (conf_addr) {

uri_addr = src_uri_addr;

while (uri_addr) {

char *conf_ip;

char *uri_ip;

apr_sockaddr_ip_get(&conf_ip, conf_addr);

apr_sockaddr_ip_get(&uri_ip, uri_addr);

ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, r->server,

"proxy: ProxyBlock comparing %s and %s", conf_ip, uri_ip);

if (!apr_strnatcasecmp(conf_ip, uri_ip)) {

ap_log_error(APLOG_MARK, APLOG_WARNING, 0, r->server,

"proxy: connect to remote machine %s blocked: IP %s matched", uri_addr->hostname, conf_ip);

return HTTP_FORBIDDEN;

}

uri_addr = uri_addr->next;

}

conf_addr = conf_addr->next;

}

}

return OK;

}

/* set up the minimal filter set */

PROXY_DECLARE(int) ap_proxy_pre_http_request(conn_rec *c, request_rec *r)

{

ap_add_input_filter("HTTP_IN", NULL, r, c);

return OK;

}

/*

* converts a series of buckets into a string

* XXX: BillS says this function performs essentially the same function as

* ap_rgetline() in protocol.c. Deprecate this function and use ap_rgetline()

* instead? I think ap_proxy_string_read() will not work properly on non ASCII

* (EBCDIC) machines either.

*/

PROXY_DECLARE(apr_status_t) ap_proxy_string_read(conn_rec *c, apr_bucket_brigade *bb,

char *buff, apr_size_t bufflen, int *eos)

{

apr_bucket *e;

apr_status_t rv;

char *pos = buff;

char *response;

int found = 0;

apr_size_t len;

/* start with an empty string */

buff[0] = 0;

*eos = 0;

/* loop through each brigade */

while (!found) {

/* get brigade from network one line at a time */

if (APR_SUCCESS != (rv = ap_get_brigade(c->input_filters, bb,

AP_MODE_GETLINE,

APR_BLOCK_READ,

0))) {

return rv;

}

/* loop through each bucket */

while (!found) {

if (*eos || APR_BRIGADE_EMPTY(bb)) {

/* The connection aborted or timed out */

return APR_ECONNABORTED;

}

e = APR_BRIGADE_FIRST(bb);

if (APR_BUCKET_IS_EOS(e)) {

*eos = 1;

}

else {

if (APR_SUCCESS != (rv = apr_bucket_read(e,

(const char **)&response,

&len,

APR_BLOCK_READ))) {

return rv;

}

/*

* is string LF terminated?

* XXX: This check can be made more efficient by simply checking

* if the last character in the 'response' buffer is an ASCII_LF.

* See ap_rgetline() for an example.

*/

if (memchr(response, APR_ASCII_LF, len)) {

found = 1;

}

/* concat strings until buff is full - then throw the data away */

if (len > ((bufflen-1)-(pos-buff))) {

len = (bufflen-1)-(pos-buff);

}