#include "mod_proxy.h"

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)

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*/

return (1 == sscanf(x, "%2x", &i)) ? os_toebcdic[i&0xFF] : 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" };

ch &= 0xFF;

x[0] = '%';

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

x[2] = ntoa[os_toascii[ch]&0x0F];

x[3] = '\0';

#endif /*APR_CHARSET_EBCDIC*/

}

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

int isenc)

{

int i, j, ch;

char *y;

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

char *reserved; /* characters which much not be en/de-coded */

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++) {

ch = x[i];

if (strchr(reserved, ch)) {

y[j] = ch;

continue;

}

if (isenc && ch == '%') {

if (!ap_isxdigit(x[i + 1]) || !ap_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;

}

}

if (!apr_isalnum(ch) && !strchr(allowed, ch)) {

ap_proxy_c2hex(ch, &y[j]);

j += 2;

}

else

y[j] = ch;

}

y[j] = '\0';

return y;

}

PROXY_DECLARE(char *)

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

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

{

apr_port_t 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;

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 (!apr_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";

for (i = 0; host[i] != '\0'; i++)

if (!apr_isdigit(host[i]) && host[i] != '.')

break;

/* must be an IP address */

if (host[i] == '\0' && (apr_inet_addr(host) == -1))

{

return "Bad IP address in URL";

}

*urlp = url;

*hostp = host;

return NULL;

}

static const char * const lwday[7] =

{"Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday"};

PROXY_DECLARE(const char *)

ap_proxy_date_canon(apr_pool_t *p, const char *x1)

{

char *x = apr_pstrdup(p, x1);

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 {

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;

}

for (mon = 0; mon < 12; mon++)

if (strcmp(month, ap_month_snames[mon]) == 0)

break;

if (mon == 12)

return x;

q = apr_palloc(p, 30);

apr_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;

}

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

{

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

rp->pool = c->pool;

rp->status = HTTP_OK;

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

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

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

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

rp->notes = apr_table_make(c->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(c->pool);

proxy_run_create_req(r, rp);

return rp;

}

PROXY_DECLARE(apr_table_t *)ap_proxy_read_headers(request_rec *r, request_rec *rr, char *buffer, int size, conn_rec *c)

{

apr_table_t *headers_out;

int len;

char *value, *end;

char field[MAX_STRING_LEN];

headers_out = ap_make_table(r->pool, 20);

/*

while ((len = ap_getline(buffer, size, rr, 1)) > 0) {

if (!(value = strchr(buffer, ':'))) { /* Find the colon separator */

/* Buggy MS IIS servers sometimes return invalid headers

if (!apr_date_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, 0, 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

while (apr_isspace(*value))

++value; /* Skip to start of value */

/* should strip trailing whitespace as well */

for (end = &value[strlen(value)-1]; end > value && apr_isspace(*end); --end)

*end = '\0';

/* make sure we merge so as not to destroy duplicated headers */

apr_table_merge(headers_out, buffer, value);

/* the header was too long; at the least we should skip extra data */

if (len >= size - 1) {

while ((len = ap_getline(field, MAX_STRING_LEN, rr, 1))

>= MAX_STRING_LEN - 1) {

/* soak up the extra data */

}

if (len == 0) /* time to exit the larger loop as well */

break;

}

}

return headers_out;

}

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;

}

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;

}

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;

}

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_uri(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>", 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|APLOG_NOERRNO, 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 = -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 = 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|APLOG_NOERRNO, 0, r,

"%s", err);

r->hostname = host;

return host; /* ought to return the port, too */

}

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 | APLOG_NOERRNO, 0, NULL,

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

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 | APLOG_NOERRNO, 0, NULL,

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

inet_ntoa(This->addr), bits);

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

ap_log_error(APLOG_MARK, APLOG_STARTUP | APLOG_NOERRNO, 0, NULL,

" 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 */

}

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)

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 | APLOG_NOERRNO, 0, NULL,

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

ap_log_error(APLOG_MARK, APLOG_STARTUP | APLOG_NOERRNO, 0, NULL,

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

ap_log_error(APLOG_MARK, APLOG_STARTUP | APLOG_NOERRNO, 0, NULL,

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

#endif

return 1;

}

#if DEBUGGING

else {

ap_log_error(APLOG_MARK, APLOG_STARTUP | APLOG_NOERRNO, 0, NULL,

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

ap_log_error(APLOG_MARK, APLOG_STARTUP | APLOG_NOERRNO, 0, NULL,

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

ap_log_error(APLOG_MARK, APLOG_STARTUP | APLOG_NOERRNO, 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 | APLOG_NOERRNO, 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 | APLOG_NOERRNO, 0, NULL,

"3)IP-Match: %s[%s] <-> ", host,

inet_ntoa(*ip));

ap_log_error(APLOG_MARK, APLOG_STARTUP | APLOG_NOERRNO, 0, NULL,

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

ap_log_error(APLOG_MARK, APLOG_STARTUP | APLOG_NOERRNO, 0, NULL,

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

#endif

return 1;

}

#if DEBUGGING

else {

ap_log_error(APLOG_MARK, APLOG_STARTUP | APLOG_NOERRNO, 0, NULL,

"3)IP-NoMatch: %s[%s] <-> ", host,

inet_ntoa(*ip));

ap_log_error(APLOG_MARK, APLOG_STARTUP | APLOG_NOERRNO, 0, NULL,

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

ap_log_error(APLOG_MARK, APLOG_STARTUP | APLOG_NOERRNO, 0, NULL,

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

}

#endif

reqaddr = reqaddr->next;

}

}

return 0;

}

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 | APLOG_NOERRNO, 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;

}

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;

}

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;

}

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;

}

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

{

This->matcher = proxy_match_word;

return 1;

}

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;

}

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

apr_sockaddr_t *uri_addr)

{

int j;

/* 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;

ap_log_error(APLOG_MARK, APLOG_DEBUG|APLOG_NOERRNO, 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|APLOG_NOERRNO, 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) {

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|APLOG_NOERRNO, 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|APLOG_NOERRNO, 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;

}

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;

}

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

char *buff, 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 != apr_bucket_read(e, (const char **)&response, &len, APR_BLOCK_READ)) {

return rv;

}

/* is string LF terminated?

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);

}

if (len > 0) {

pos = apr_cpystrn(pos, response, len);

}

}

APR_BUCKET_REMOVE(e);

apr_bucket_destroy(e);

}

}

return APR_SUCCESS;

}

PROXY_DECLARE(void) ap_proxy_reset_output_filters(conn_rec *c)

{

ap_filter_t *f = c->output_filters;

while (f) {

if (!strcasecmp(f->frec->name, "CORE") ||

!strcasecmp(f->frec->name, "CONTENT_LENGTH") ||

!strcasecmp(f->frec->name, "HTTP_HEADER")) {

f = f->next;

continue;

}

else {

ap_remove_output_filter(f);

f = f->next;

}

}

}

PROXY_DECLARE(void) ap_proxy_table_unmerge(apr_pool_t *p, apr_table_t *t, char *key)

{

apr_off_t offset = 0;

apr_off_t count = 0;

char *value = NULL;

/* get the value to unmerge */

const char *initial = apr_table_get(t, key);

if (!initial) {

return;

}

value = apr_pstrdup(p, initial);

/* remove the value from the headers */

apr_table_unset(t, key);

/* find each comma */

while (value[count]) {

if (value[count] == ',') {

value[count] = 0;

apr_table_add(t, key, value + offset);

offset = count + 1;

}

count++;

}

apr_table_add(t, key, value + offset);

}

PROXY_DECLARE(int) ap_proxy_connect_to_backend(apr_socket_t **newsock,

const char *proxy_function,

apr_sockaddr_t *backend_addr,

const char *backend_name,

proxy_server_conf *conf,

server_rec *s,

apr_pool_t *p)

{

apr_status_t rv;

int connected = 0;

int loglevel;

while (backend_addr && !connected) {

if ((rv = apr_socket_create(newsock, backend_addr->family,

SOCK_STREAM, p)) != APR_SUCCESS) {

loglevel = backend_addr->next ? APLOG_DEBUG : APLOG_ERR;

ap_log_error(APLOG_MARK, loglevel, rv, s,

"proxy: %s: error creating fam %d socket for target %s",

proxy_function,

backend_addr->family,

backend_name);

/* this could be an IPv6 address from the DNS but the

backend_addr = backend_addr->next;

continue;

}

#if !defined(TPF) && !defined(BEOS)

if (conf->recv_buffer_size > 0 &&

(rv = apr_setsocketopt(*newsock, APR_SO_RCVBUF,

conf->recv_buffer_size))) {

ap_log_error(APLOG_MARK, APLOG_ERR, rv, s,

"setsockopt(SO_RCVBUF): Failed to set "

"ProxyReceiveBufferSize, using default");

}

#endif

/* Set a timeout on the socket */

if (conf->timeout_set == 1) {

apr_setsocketopt(*newsock, APR_SO_TIMEOUT,

(int)(conf->timeout * APR_USEC_PER_SEC));

}

else {

apr_setsocketopt(*newsock, APR_SO_TIMEOUT,

(int)(s->timeout * APR_USEC_PER_SEC));

}

ap_log_error(APLOG_MARK, APLOG_DEBUG|APLOG_NOERRNO, 0, s,

"proxy: %s: fam %d socket created to connect to %s",

proxy_function, backend_addr->family, backend_name);

/* make the connection out of the socket */

rv = apr_connect(*newsock, backend_addr);

/* if an error occurred, loop round and try again */

if (rv != APR_SUCCESS) {

apr_socket_close(*newsock);

loglevel = backend_addr->next ? APLOG_DEBUG : APLOG_ERR;

ap_log_error(APLOG_MARK, loglevel, rv, s,

"proxy: %s: attempt to connect to %pI (%s) failed",

proxy_function,

backend_addr,

backend_name);

backend_addr = backend_addr->next;

continue;

}

connected = 1;

}

return connected ? 0 : 1;

}