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mod_proxy.c
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/*
* ProFTPD - mod_proxy
* Copyright (c) 2012-2025 TJ Saunders
*
* 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 your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Suite 500, Boston, MA 02110-1335, USA.
*
* As a special exemption, TJ Saunders and other respective copyright holders
* give permission to link this program with OpenSSL, and distribute the
* resulting executable, without including the source code for OpenSSL in the
* source distribution.
*
* -----DO NOT EDIT BELOW THIS LINE-----
* $Archive: mod_proxy.a $
* $Libraries: -lsqlite3 -lssl -lcrypto$
*/
#include "mod_proxy.h"
#include "proxy/random.h"
#include "proxy/db.h"
#include "proxy/session.h"
#include "proxy/conn.h"
#include "proxy/netio.h"
#include "proxy/inet.h"
#include "proxy/ssh.h"
#include "proxy/tls.h"
#include "proxy/forward.h"
#include "proxy/reverse.h"
#include "proxy/ftp/conn.h"
#include "proxy/ftp/ctrl.h"
#include "proxy/ftp/data.h"
#include "proxy/ftp/dirlist.h"
#include "proxy/ftp/facts.h"
#include "proxy/ftp/msg.h"
#include "proxy/ftp/sess.h"
#include "proxy/ftp/xfer.h"
#include "proxy/ssh/ssh2.h"
#include "proxy/ssh/auth.h"
#include "proxy/ssh/crypto.h"
#if defined(HAVE_OSSL_PROVIDER_LOAD_OPENSSL)
# include <openssl/provider.h>
#endif /* HAVE_OSSL_PROVIDER_LOAD_OPENSSL */
/* Proxy role */
#define PROXY_ROLE_REVERSE 1
#define PROXY_ROLE_FORWARD 2
/* How long (in secs) to wait to connect to real server? */
#define PROXY_CONNECT_DEFAULT_TIMEOUT 5
/* How long (in secs) to wait for the end-of-data-transfer response? */
#define PROXY_LINGER_DEFAULT_TIMEOUT 3
extern xaset_t *server_list;
extern module xfer_module;
/* From response.c */
extern pr_response_t *resp_list, *resp_err_list;
module proxy_module;
int proxy_logfd = -1;
pool *proxy_pool = NULL;
unsigned long proxy_opts = 0UL;
unsigned int proxy_sess_state = 0U;
int proxy_datastore = PROXY_DATASTORE_SQLITE;
void *proxy_datastore_data = NULL;
size_t proxy_datastore_datasz = 0;
static int proxy_engine = FALSE;
static unsigned int proxy_login_attempts = 0;
static int proxy_role = PROXY_ROLE_REVERSE;
static const char *proxy_tables_dir = NULL;
static int proxy_tls_xfer_prot_policy = PROXY_FTP_SESS_TLS_XFER_PROTECTION_POLICY_REQUIRED;
#if defined(HAVE_OSSL_PROVIDER_LOAD_OPENSSL)
static OSSL_PROVIDER *legacy_provider = NULL;
#endif /* HAVE_OSSL_PROVIDER_LOAD_OPENSSL */
static const char *trace_channel = "proxy";
/* Necessary function prototypes. */
static int proxy_sess_init(void);
static void proxy_timeoutidle_ev(const void *, void *);
static void proxy_timeoutnoxfer_ev(const void *, void *);
static void proxy_timeoutstalled_ev(const void *, void *);
static int recv_resp(cmd_rec *cmd, struct proxy_session *proxy_sess,
pr_response_t **rp) {
int res, xerrno = 0;
pr_response_t *resp;
unsigned int resp_nlines = 0;
resp = proxy_ftp_ctrl_recv_resp(cmd->tmp_pool, proxy_sess->backend_ctrl_conn,
&resp_nlines, 0);
if (resp == NULL) {
xerrno = errno;
/* For a certain number of conditions, if we cannot read the response
* from the backend, then we should just close the frontend, otherwise
* we might "leak" to the client the fact that we are fronting some
* backend server rather than being the server.
*/
if (xerrno == ECONNRESET ||
xerrno == ECONNABORTED ||
xerrno == ENOENT ||
xerrno == EPIPE) {
pr_session_disconnect(&proxy_module, PR_SESS_DISCONNECT_BY_APPLICATION,
"Backend control connection lost");
}
(void) pr_log_writefile(proxy_logfd, MOD_PROXY_VERSION,
"error receiving %s response from backend: %s", (char *) cmd->argv[0],
strerror(xerrno));
pr_response_add_err(R_500, _("%s: %s"), (char *) cmd->argv[0],
strerror(xerrno));
pr_response_flush(&resp_err_list);
errno = xerrno;
return -1;
}
res = proxy_ftp_ctrl_send_resp(cmd->tmp_pool, proxy_sess->frontend_ctrl_conn,
resp, resp_nlines);
if (res < 0) {
xerrno = errno;
pr_response_block(TRUE);
errno = xerrno;
return -1;
}
if (rp != NULL) {
*rp = resp;
}
return 0;
}
MODRET proxy_cmd(cmd_rec *cmd, struct proxy_session *proxy_sess,
pr_response_t **rp) {
int res, xerrno = 0;
res = proxy_ftp_ctrl_send_cmd(cmd->tmp_pool, proxy_sess->backend_ctrl_conn,
cmd);
xerrno = errno;
if (res < 0) {
xerrno = errno;
(void) pr_log_writefile(proxy_logfd, MOD_PROXY_VERSION,
"error sending %s to backend: %s", (char *) cmd->argv[0],
strerror(xerrno));
pr_response_add_err(R_500, _("%s: %s"), (char *) cmd->argv[0],
strerror(xerrno));
pr_response_flush(&resp_err_list);
errno = xerrno;
return PR_ERROR(cmd);
}
if (recv_resp(cmd, proxy_sess, rp) < 0) {
return PR_ERROR(cmd);
}
pr_response_block(TRUE);
return PR_HANDLED(cmd);
}
MODRET proxy_abort(cmd_rec *cmd, struct proxy_session *proxy_sess,
pr_response_t **rp) {
int res, xerrno = 0;
res = proxy_ftp_ctrl_send_abort(cmd->tmp_pool,
proxy_sess->backend_ctrl_conn, cmd);
xerrno = errno;
if (res < 0) {
(void) pr_log_writefile(proxy_logfd, MOD_PROXY_VERSION,
"error sending %s to backend: %s", (char *) cmd->argv[0],
strerror(xerrno));
pr_response_add_err(R_500, _("%s: %s"), (char *) cmd->argv[0],
strerror(xerrno));
pr_response_flush(&resp_err_list);
errno = xerrno;
return PR_ERROR(cmd);
}
if (proxy_sess->backend_data_conn != NULL) {
pr_trace_msg(trace_channel, 19, "received ABOR on frontend connection, "
"closing backend data connection");
proxy_inet_close(session.pool, proxy_sess->backend_data_conn);
pr_inet_close(session.pool, proxy_sess->backend_data_conn);
proxy_sess->backend_data_conn = NULL;
}
if (recv_resp(cmd, proxy_sess, rp) < 0) {
return PR_ERROR(cmd);
}
/* The ABOR command might have two responses, as when there is a data
* transfer in progress: one response for the data transfer, and one for
* handling the ABOR command itself.
*/
if ((proxy_sess->frontend_sess_flags & SF_XFER) ||
(proxy_sess->backend_sess_flags & SF_XFER)) {
if (recv_resp(cmd, proxy_sess, rp) < 0) {
return PR_ERROR(cmd);
}
}
pr_response_block(TRUE);
return PR_HANDLED(cmd);
}
MODRET proxy_data_cmd(cmd_rec *cmd, struct proxy_session *proxy_sess) {
int res, xerrno = 0;
modret_t *mr;
pr_response_t *resp = NULL;
unsigned int resp_nlines = 0;
mr = proxy_cmd(cmd, proxy_sess, &resp);
if (!MODRET_ISHANDLED(mr)) {
pr_response_block(TRUE);
return mr;
}
if (resp->num[0] != '1') {
(void) pr_log_writefile(proxy_logfd, MOD_PROXY_VERSION,
"received non-1xx response from backend for %s: %s %s",
(char *) cmd->argv[0], resp->num, resp->msg);
pr_response_block(FALSE);
pr_response_add_err(resp->num, "%s", resp->msg);
pr_response_flush(&resp_err_list);
pr_response_block(TRUE);
errno = EINVAL;
return PR_ERROR(cmd);
}
/* Now we wait for our closing response. */
resp = proxy_ftp_ctrl_recv_resp(cmd->tmp_pool, proxy_sess->backend_ctrl_conn,
&resp_nlines, 0);
if (resp == NULL) {
xerrno = errno;
pr_response_block(FALSE);
/* For a certain number of conditions, if we cannot read the response
* from the backend, then we should just close the frontend, otherwise
* we might "leak" to the client the fact that we are fronting some
* backend server rather than being the server.
*/
if (xerrno == ECONNRESET ||
xerrno == ECONNABORTED ||
xerrno == ENOENT ||
xerrno == EPIPE) {
pr_session_disconnect(&proxy_module, PR_SESS_DISCONNECT_BY_APPLICATION,
"Backend control connection lost");
}
(void) pr_log_writefile(proxy_logfd, MOD_PROXY_VERSION,
"error receiving %s response from backend: %s", (char *) cmd->argv[0],
strerror(xerrno));
pr_response_add_err(R_500, _("%s: %s"), (char *) cmd->argv[0],
strerror(xerrno));
pr_response_flush(&resp_err_list);
pr_response_block(TRUE);
errno = xerrno;
return PR_ERROR(cmd);
}
pr_response_block(FALSE);
res = proxy_ftp_ctrl_send_resp(cmd->tmp_pool, proxy_sess->frontend_ctrl_conn,
resp, resp_nlines);
if (res < 0) {
xerrno = errno;
pr_response_block(TRUE);
errno = xerrno;
return PR_ERROR(cmd);
}
pr_response_block(TRUE);
return PR_HANDLED(cmd);
}
static int proxy_stalled_timeout_cb(CALLBACK_FRAME) {
int timeout_stalled;
timeout_stalled = pr_data_get_timeout(PR_DATA_TIMEOUT_STALLED);
pr_event_generate("core.timeout-stalled", NULL);
pr_log_pri(PR_LOG_NOTICE, "Data transfer stall timeout: %d %s",
timeout_stalled, timeout_stalled != 1 ? "seconds" : "second");
pr_session_disconnect(NULL, PR_SESS_DISCONNECT_TIMEOUT,
"TimeoutStalled during data transfer");
/* Do not restart the timer (should never be reached). */
return 0;
}
static int proxy_mkdir(const char *dir, uid_t uid, gid_t gid, mode_t mode) {
mode_t prev_mask;
struct stat st;
int res = -1;
res = stat(dir, &st);
if (res < 0 &&
errno != ENOENT) {
return -1;
}
/* The directory already exists. */
if (res == 0) {
return 0;
}
/* The given mode is absolute, not subject to any Umask setting. */
prev_mask = umask(0);
if (mkdir(dir, mode) < 0) {
int xerrno = errno;
(void) umask(prev_mask);
errno = xerrno;
return -1;
}
umask(prev_mask);
if (chown(dir, uid, gid) < 0) {
return -1;
}
return 0;
}
static int proxy_mkpath(pool *p, const char *path, uid_t uid, gid_t gid,
mode_t mode) {
char *currpath = NULL, *tmppath = NULL;
struct stat st;
if (stat(path, &st) == 0) {
/* Path already exists, nothing to be done. */
errno = EEXIST;
return -1;
}
tmppath = pstrdup(p, path);
currpath = "/";
while (tmppath && *tmppath) {
char *currdir = strsep(&tmppath, "/");
currpath = pdircat(p, currpath, currdir, NULL);
if (proxy_mkdir(currpath, uid, gid, mode) < 0) {
return -1;
}
pr_signals_handle();
}
return 0;
}
static void proxy_remove_symbols(void) {
int res;
/* Remove mod_xfer's PRE_CMD handlers; they will only interfere
* with proxied data transfers (see GitHub issue #3).
*/
res = pr_stash_remove_cmd(C_APPE, &xfer_module, PRE_CMD, NULL, -1);
if (res < 0) {
pr_trace_msg(trace_channel, 1,
"error removing PRE_CMD APPE mod_xfer handler: %s", strerror(errno));
} else {
pr_trace_msg(trace_channel, 9, "removed PRE_CMD APPE mod_xfer handlers");
}
res = pr_stash_remove_cmd(C_RETR, &xfer_module, PRE_CMD, NULL, -1);
if (res < 0) {
pr_trace_msg(trace_channel, 1,
"error removing PRE_CMD RETR mod_xfer handler: %s", strerror(errno));
} else {
pr_trace_msg(trace_channel, 9, "removed PRE_CMD RETR mod_xfer handlers");
}
res = pr_stash_remove_cmd(C_STOR, &xfer_module, PRE_CMD, NULL, -1);
if (res < 0) {
pr_trace_msg(trace_channel, 1,
"error removing PRE_CMD STOR mod_xfer handler: %s", strerror(errno));
} else {
pr_trace_msg(trace_channel, 9, "removed PRE_CMD STOR mod_xfer handlers");
}
res = pr_stash_remove_cmd(C_STOU, &xfer_module, PRE_CMD, NULL, -1);
if (res < 0) {
pr_trace_msg(trace_channel, 1,
"error removing PRE_CMD STOU mod_xfer handler: %s", strerror(errno));
} else {
pr_trace_msg(trace_channel, 9, "removed PRE_CMD STOU mod_xfer handlers");
}
}
static void proxy_restrict_session(void) {
const char *proxy_chroot = NULL;
config_rec *c;
char *xferlog = PR_XFERLOG_PATH;
/* Open the TransferLog here, BEFORE we chroot. */
c = find_config(main_server->conf, CONF_PARAM, "TransferLog", FALSE);
if (c != NULL) {
xferlog = c->argv[0];
}
PRIVS_ROOT
if (strcasecmp(xferlog, "none") == 0) {
xferlog_open(NULL);
} else {
xferlog_open(xferlog);
}
if (getuid() == PR_ROOT_UID) {
int res;
/* Chroot to the ProxyTables/empty/ directory before dropping root privs. */
proxy_chroot = pdircat(proxy_pool, proxy_tables_dir, "empty", NULL);
res = chroot(proxy_chroot);
if (res < 0) {
int xerrno = errno;
PRIVS_RELINQUISH
(void) pr_log_writefile(proxy_logfd, MOD_PROXY_VERSION,
"unable to chroot to ProxyTables/empty/ directory '%s': %s",
proxy_chroot, strerror(xerrno));
pr_session_disconnect(&proxy_module, PR_SESS_DISCONNECT_MODULE_ACL,
"Unable to chroot proxy session");
} else {
pr_trace_msg(trace_channel, 9, "chrooted session to '%s'", proxy_chroot);
}
if (chdir("/") < 0) {
int xerrno = errno;
PRIVS_RELINQUISH
(void) pr_log_writefile(proxy_logfd, MOD_PROXY_VERSION,
"unable to chdir to root directory within chroot: %s",
strerror(xerrno));
pr_session_disconnect(&proxy_module, PR_SESS_DISCONNECT_MODULE_ACL,
"Unable to chroot proxy session");
}
}
/* Make the proxy session process have the identity of the configured daemon
* User/Group.
*/
PRIVS_REVOKE
session.disable_id_switching = TRUE;
if (proxy_chroot != NULL) {
(void) pr_log_writefile(proxy_logfd, MOD_PROXY_VERSION,
"proxy session running as UID %lu, GID %lu, restricted to '%s'",
(unsigned long) getuid(), (unsigned long) getgid(), proxy_chroot);
} else {
(void) pr_log_writefile(proxy_logfd, MOD_PROXY_VERSION,
"proxy session running as UID %lu, GID %lu, located in '%s'",
(unsigned long) getuid(), (unsigned long) getgid(), getcwd(NULL, 0));
}
}
/* Configuration handlers
*/
/* usage: ProxyDataTransferPolicy "active"|"passive"|"pasv"|"epsv"|"port"|
* "eprt"|"client"
*/
MODRET set_proxydataxferpolicy(cmd_rec *cmd) {
config_rec *c;
int cmd_id = -1;
CHECK_ARGS(cmd, 1);
CHECK_CONF(cmd, CONF_ROOT|CONF_VIRTUAL|CONF_GLOBAL);
cmd_id = pr_cmd_get_id(cmd->argv[1]);
if (cmd_id < 0) {
if (strncasecmp(cmd->argv[1], "active", 7) == 0) {
/* Try to use EPRT over PORT. */
cmd_id = PR_CMD_EPRT_ID;
} else if (strncasecmp(cmd->argv[1], "passive", 8) == 0) {
/* Try to use EPSV over PASV. */
cmd_id = PR_CMD_EPSV_ID;
} else if (strncasecmp(cmd->argv[1], "client", 7) == 0) {
cmd_id = 0;
} else {
CONF_ERROR(cmd, pstrcat(cmd->tmp_pool, "unsupported DataTransferPolicy: ",
(char *) cmd->argv[1], NULL));
}
}
if (cmd_id != PR_CMD_PASV_ID &&
cmd_id != PR_CMD_EPSV_ID &&
cmd_id != PR_CMD_PORT_ID &&
cmd_id != PR_CMD_EPRT_ID &&
cmd_id != 0) {
CONF_ERROR(cmd, pstrcat(cmd->tmp_pool, "unsupported DataTransferPolicy: ",
(char *) cmd->argv[1], NULL));
}
c = add_config_param(cmd->argv[0], 1, NULL);
c->argv[0] = palloc(c->pool, sizeof(int));
*((int *) c->argv[0]) = cmd_id;
return PR_HANDLED(cmd);
}
/* usage: ProxyDatastore type [info] */
MODRET set_proxydatastore(cmd_rec *cmd) {
int ds = -1;
const char *ds_name = NULL;
void *ds_data = NULL;
size_t ds_datasz = 0;
CHECK_ARGS(cmd, 1);
CHECK_CONF(cmd, CONF_ROOT);
ds_name = cmd->argv[1];
if (strcasecmp(ds_name, "sqlite") == 0) {
ds = PROXY_DATASTORE_SQLITE;
ds_data = NULL;
ds_datasz = 0;
#ifdef PR_USE_REDIS
} else if (strcasecmp(ds_name, "redis") == 0) {
if (cmd->argc != 3) {
CONF_ERROR(cmd, "missing required Redis key prefix");
}
ds = PROXY_DATASTORE_REDIS;
ds_data = pstrdup(proxy_pool, cmd->argv[2]);
ds_datasz = strlen(ds_data);
#endif /* PR_USE_REDIS */
} else {
CONF_ERROR(cmd, pstrcat(cmd->tmp_pool, "unsupported ProxyDatastore: ",
ds_name, NULL));
}
proxy_datastore = ds;
proxy_datastore_data = ds_data;
proxy_datastore_datasz = ds_datasz;
return PR_HANDLED(cmd);
}
/* usage: ProxyDirectoryListPolicy "client"|"LIST" [opt1 ... ]*/
MODRET set_proxydirlistpolicy(cmd_rec *cmd) {
config_rec *c;
int policy_id = -1;
unsigned long opts = 0UL;
if (cmd->argc < 2) {
CONF_ERROR(cmd, "wrong number of parameters");
}
CHECK_CONF(cmd, CONF_ROOT|CONF_VIRTUAL|CONF_GLOBAL);
if (strcasecmp(cmd->argv[1], "client") == 0) {
policy_id = PROXY_SESS_DIRECTORY_LIST_POLICY_DEFAULT;
} else if (strcasecmp(cmd->argv[1], "LIST") == 0) {
policy_id = PROXY_SESS_DIRECTORY_LIST_POLICY_LIST;
} else {
CONF_ERROR(cmd, pstrcat(cmd->tmp_pool, "unsupported DirectoryListPolicy: ",
(char *) cmd->argv[1], NULL));
}
if (cmd->argc > 2) {
register unsigned int i;
for (i = 2; i < cmd->argc; i++) {
if (strcasecmp(cmd->argv[i], "UseSlink") == 0) {
opts |= PROXY_FTP_DIRLIST_OPT_USE_SLINK;
} else {
CONF_ERROR(cmd, pstrcat(cmd->tmp_pool,
"unknown DirectoryListPolicy option: ", (char *) cmd->argv[i], NULL));
}
}
}
c = add_config_param(cmd->argv[0], 2, NULL, NULL);
c->argv[0] = palloc(c->pool, sizeof(int));
*((int *) c->argv[0]) = policy_id;
c->argv[1] = palloc(c->pool, sizeof(unsigned long));
*((unsigned long *) c->argv[1]) = opts;
return PR_HANDLED(cmd);
}
/* usage: ProxyEngine on|off */
MODRET set_proxyengine(cmd_rec *cmd) {
int engine = 1;
config_rec *c;
CHECK_ARGS(cmd, 1);
CHECK_CONF(cmd, CONF_ROOT|CONF_VIRTUAL|CONF_GLOBAL);
engine = get_boolean(cmd, 1);
if (engine == -1) {
CONF_ERROR(cmd, "expected Boolean parameter");
}
c = add_config_param(cmd->argv[0], 1, NULL);
c->argv[0] = pcalloc(c->pool, sizeof(int));
*((int *) c->argv[0]) = engine;
return PR_HANDLED(cmd);
}
/* usage: ProxyForwardEnabled on|off */
MODRET set_proxyforwardenabled(cmd_rec *cmd) {
int enabled = -1, *note = NULL, res;
CHECK_ARGS(cmd, 1);
CHECK_CONF(cmd, CONF_CLASS);
enabled = get_boolean(cmd, 1);
if (enabled < 0) {
CONF_ERROR(cmd, "expected Boolean parameter");
}
/* Stash this setting in the notes for this class. */
note = palloc(cmd->server->pool, sizeof(int));
*note = enabled;
res = pr_class_add_note(PROXY_FORWARD_ENABLED_NOTE, note, sizeof(int));
if (res < 0) {
CONF_ERROR(cmd, pstrcat(cmd->tmp_pool, "error storing parameter: ",
strerror(errno), NULL));
}
return PR_HANDLED(cmd);
}
/* usage: ProxyForwardMethod method */
MODRET set_proxyforwardmethod(cmd_rec *cmd) {
config_rec *c;
int forward_method = -1;
CHECK_ARGS(cmd, 1);
CHECK_CONF(cmd, CONF_ROOT|CONF_VIRTUAL|CONF_GLOBAL);
forward_method = proxy_forward_get_method(cmd->argv[1]);
if (forward_method < 0) {
CONF_ERROR(cmd, pstrcat(cmd->tmp_pool,
"unknown/unsupported forward method: ", (char *) cmd->argv[1], NULL));
}
c = add_config_param(cmd->argv[0], 1, NULL);
c->argv[0] = palloc(c->pool, sizeof(int));
*((int *) c->argv[0]) = forward_method;
return PR_HANDLED(cmd);
}
/* usage: ProxyForwardTo [!]pattern [flags] */
MODRET set_proxyforwardto(cmd_rec *cmd) {
#ifdef PR_USE_REGEX
config_rec *c;
pr_regex_t *pre = NULL;
int negated = FALSE, regex_flags = REG_EXTENDED|REG_NOSUB, res = 0;
char *pattern;
if (cmd->argc-1 < 1 ||
cmd->argc-1 > 2) {
CONF_ERROR(cmd, "bad number of parameters");
}
CHECK_CONF(cmd, CONF_ROOT|CONF_VIRTUAL|CONF_GLOBAL);
/* Make sure that, if present, the flags parameter is correctly formatted. */
if (cmd->argc-1 == 2) {
int flags = 0;
/* We need to parse the flags parameter here, to see if any flags which
* affect the compilation of the regex (e.g. NC) are present.
*/
flags = pr_filter_parse_flags(cmd->tmp_pool, cmd->argv[2]);
if (flags < 0) {
CONF_ERROR(cmd, pstrcat(cmd->tmp_pool,
": badly formatted flags parameter: '", (char *) cmd->argv[2], "'",
NULL));
}
if (flags == 0) {
CONF_ERROR(cmd, pstrcat(cmd->tmp_pool,
": unknown filter flags '", (char *) cmd->argv[2], "'", NULL));
}
regex_flags |= flags;
}
pre = pr_regexp_alloc(&proxy_module);
pattern = cmd->argv[1];
if (*pattern == '!') {
negated = TRUE;
pattern++;
}
res = pr_regexp_compile(pre, pattern, regex_flags);
if (res != 0) {
char errstr[200] = {'\0'};
pr_regexp_error(res, pre, errstr, sizeof(errstr));
pr_regexp_free(NULL, pre);
CONF_ERROR(cmd, pstrcat(cmd->tmp_pool, "'", pattern, "' failed regex "
"compilation: ", errstr, NULL));
}
c = add_config_param(cmd->argv[0], 2, pre, NULL);
c->argv[1] = palloc(c->pool, sizeof(int));
*((int *) c->argv[1]) = negated;
return PR_HANDLED(cmd);
#else /* no regular expression support at the moment */
CONF_ERROR(cmd, pstrcat(cmd->tmp_pool, "The ", param, " directive cannot be "
"used on this system, as you do not have POSIX compliant regex support",
NULL));
#endif
}
/* usage: ProxyLog path|"none" */
MODRET set_proxylog(cmd_rec *cmd) {
CHECK_ARGS(cmd, 1);
CHECK_CONF(cmd, CONF_ROOT|CONF_VIRTUAL|CONF_GLOBAL);
(void) add_config_param_str(cmd->argv[0], 1, cmd->argv[1]);
return PR_HANDLED(cmd);
}
/* usage: ProxyOptions opt1 ... optN */
MODRET set_proxyoptions(cmd_rec *cmd) {
register unsigned int i;
config_rec *c;
unsigned long opts = 0UL;
if (cmd->argc-1 == 0) {
CONF_ERROR(cmd, "wrong number of parameters");
}
CHECK_CONF(cmd, CONF_ROOT|CONF_VIRTUAL|CONF_GLOBAL);
c = add_config_param(cmd->argv[0], 1, NULL);
for (i = 1; i < cmd->argc; i++) {
if (strcmp(cmd->argv[i], "UseProxyProtocol") == 0 ||
strcmp(cmd->argv[i], "UseProxyProtocolV1") == 0) {
opts |= PROXY_OPT_USE_PROXY_PROTOCOL_V1;
} else if (strcmp(cmd->argv[i], "UseProxyProtocolV2") == 0) {
opts |= PROXY_OPT_USE_PROXY_PROTOCOL_V2;
} else if (strcmp(cmd->argv[i], "UseProxyProtocolV2TLVs") == 0) {
opts |= PROXY_OPT_USE_PROXY_PROTOCOL_V2_TLVS;
} else if (strcmp(cmd->argv[i], "ShowFeatures") == 0) {
opts |= PROXY_OPT_SHOW_FEATURES;
} else if (strcmp(cmd->argv[i], "UseReverseProxyAuth") == 0) {
opts |= PROXY_OPT_USE_REVERSE_PROXY_AUTH;
} else if (strcmp(cmd->argv[i], "UseDirectDataTransfers") == 0) {
opts |= PROXY_OPT_USE_DIRECT_DATA_TRANSFERS;
} else if (strcmp(cmd->argv[i], "IgnoreConfigPerms") == 0) {
opts |= PROXY_OPT_IGNORE_CONFIG_PERMS;
} else if (strcmp(cmd->argv[i], "AllowForeignAddress") == 0) {
opts |= PROXY_OPT_ALLOW_FOREIGN_ADDRESS;
} else if (strcmp(cmd->argv[i], "IgnoreForeignAddress") == 0) {
opts |= PROXY_OPT_IGNORE_FOREIGN_ADDRESS;
} else {
CONF_ERROR(cmd, pstrcat(cmd->tmp_pool, ": unknown ProxyOption '",
(char *) cmd->argv[i], "'", NULL));
}
}
c->argv[0] = pcalloc(c->pool, sizeof(unsigned long));
*((unsigned long *) c->argv[0]) = opts;
if (pr_module_exists("mod_ifsession.c")) {
/* These are needed in case this directive is used with mod_ifsession
* configuration.
*/
c->flags |= CF_MULTI;
}
return PR_HANDLED(cmd);
}
/* usage: ProxyRetryCount count */
MODRET set_proxyretrycount(cmd_rec *cmd) {
config_rec *c;
int retry_count = -1;
CHECK_ARGS(cmd, 1);
CHECK_CONF(cmd, CONF_ROOT|CONF_VIRTUAL|CONF_GLOBAL);
retry_count = atoi(cmd->argv[1]);
if (retry_count < 1) {
CONF_ERROR(cmd, "retry count must be one or more");
}
c = add_config_param(cmd->argv[0], 1, NULL);
c->argv[0] = palloc(c->pool, sizeof(int));
*((int *) c->argv[0]) = retry_count;
return PR_HANDLED(cmd);
}
/* usage: ProxyReverseConnectPolicy [policy] */
MODRET set_proxyreverseconnectpolicy(cmd_rec *cmd) {
config_rec *c;
int connect_policy = -1;
CHECK_ARGS(cmd, 1);
CHECK_CONF(cmd, CONF_ROOT|CONF_VIRTUAL|CONF_GLOBAL);
connect_policy = proxy_reverse_connect_get_policy_id(cmd->argv[1]);
if (connect_policy < 0) {
CONF_ERROR(cmd, pstrcat(cmd->tmp_pool,
"unknown/unsupported connect policy: ", (char *) cmd->argv[1], NULL));
}
c = add_config_param(cmd->argv[0], 1, NULL);
c->argv[0] = palloc(c->pool, sizeof(int));
*((int *) c->argv[0]) = connect_policy;
return PR_HANDLED(cmd);
}
/* usage: ProxyReverseServers server1 ... server N
* file:/path/to/server/list.txt
* sql:/SQLNamedQuery
*/
MODRET set_proxyreverseservers(cmd_rec *cmd) {
config_rec *c;
array_header *backend_servers;
char *uri = NULL;
unsigned int flags = PROXY_CONN_CREATE_FL_USE_DNS_TTL;
if (cmd->argc-1 < 1) {
CONF_ERROR(cmd, "wrong number of parameters");
}
CHECK_CONF(cmd, CONF_ROOT|CONF_VIRTUAL|CONF_GLOBAL);
c = add_config_param(cmd->argv[0], 2, NULL, NULL);
backend_servers = make_array(c->pool, 1, sizeof(struct proxy_conn *));
if (cmd->argc-1 == 1) {
/* We are dealing with one of the following possibilities:
*
* file:/path/to/file.txt
* sql://SQLNamedQuery/...
* <server>
*/
if (strncmp(cmd->argv[1], "file:", 5) == 0) {
char *param, *path;
param = cmd->argv[1];
path = param + 5;
/* If the path contains the %U or %g variables, then defer loading of
* this file until the USER name is known.
*/
if (strstr(path, "%U") == NULL &&
strstr(path, "%g") == NULL) {
int xerrno;
/* For now, load the list of servers at sess init time. In
* the future, we will want to load it at postparse time, mapped
* to the appropriate server_rec, and clear/reload on 'core.restart'.
*/
PRIVS_ROOT
backend_servers = proxy_reverse_json_parse_uris(cmd->server->pool,
path, flags);
xerrno = errno;
PRIVS_RELINQUISH
if (backend_servers == NULL) {
CONF_ERROR(cmd, pstrcat(cmd->tmp_pool,
"error reading ProxyReverseServers file '", path, "': ",
strerror(xerrno), NULL));
}
if (backend_servers->nelts == 0) {
CONF_ERROR(cmd, pstrcat(cmd->tmp_pool,
"no usable URLs found in file '", path, "'", NULL));
}
} else {
/* Only provide a URI for dynamic lookup, e.g. per-user/group/etc. */
uri = cmd->argv[1];
}
} else if (strncmp(cmd->argv[1], "sql:/", 5) == 0) {
/* Unfortunately there's not very much we can do to validate these
* SQL URIs at the moment. They point to a SQLNamedQuery, which
* may not have been parsed yet from the config file, or which may be
* in a <Global> scope. Thus we simply store them for now, and
* let the lookup routines do the necessary validation.
*/
uri = cmd->argv[1];
} else {
/* Treat it as a server-spec (i.e. a URI) */
const struct proxy_conn *pconn;
pconn = proxy_conn_create(c->pool, cmd->argv[1], flags);
if (pconn == NULL) {
CONF_ERROR(cmd, pstrcat(cmd->tmp_pool, "error parsing '",
(char *) cmd->argv[1], "': ", strerror(errno), NULL));
}
*((const struct proxy_conn **) push_array(backend_servers)) = pconn;
}
} else {
register unsigned int i;
/* More than one parameter, which means they are all URIs. */
for (i = 1; i < cmd->argc; i++) {
const struct proxy_conn *pconn;
pconn = proxy_conn_create(c->pool, cmd->argv[i], flags);
if (pconn == NULL) {
CONF_ERROR(cmd, pstrcat(cmd->tmp_pool, "error parsing '",
(char *) cmd->argv[i], "': ", strerror(errno), NULL));
}
*((const struct proxy_conn **) push_array(backend_servers)) = pconn;
}
}
c->argv[0] = backend_servers;
if (uri != NULL) {
c->argv[1] = pstrdup(c->pool, uri);
}
if (pr_module_exists("mod_ifsession.c")) {
/* These are needed in case this directive is used with mod_ifsession
* configuration.
*/
c->flags |= CF_MULTI;