/* 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" #include "apr_hash.h" #include "proxy_util.h" #include "ajp.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 #if APR_HAVE_SYS_UN_H #include <sys/un.h> #endif #if (APR_MAJOR_VERSION < 2) #include "apr_support.h" /* for apr_wait_for_io_or_timeout() */ #endif APLOG_USE_MODULE(proxy); /* * Opaque structure containing target server info when * using a forward proxy. * Up to now only used in combination with HTTP CONNECT. */ typedef struct { int use_http_connect; /* Use SSL Tunneling via HTTP CONNECT */ const char *target_host; /* Target hostname */ apr_port_t target_port; /* Target port */ const char *proxy_auth; /* Proxy authorization */ } forward_info; /* Keep synced with mod_proxy.h! */ static struct wstat { unsigned int bit; char flag; const char *name; } wstat_tbl[] = { {PROXY_WORKER_INITIALIZED, PROXY_WORKER_INITIALIZED_FLAG, "Init "}, {PROXY_WORKER_IGNORE_ERRORS, PROXY_WORKER_IGNORE_ERRORS_FLAG, "Ign "}, {PROXY_WORKER_DRAIN, PROXY_WORKER_DRAIN_FLAG, "Drn "}, {PROXY_WORKER_IN_SHUTDOWN, PROXY_WORKER_IN_SHUTDOWN_FLAG, "Shut "}, {PROXY_WORKER_DISABLED, PROXY_WORKER_DISABLED_FLAG, "Dis "}, {PROXY_WORKER_STOPPED, PROXY_WORKER_STOPPED_FLAG, "Stop "}, {PROXY_WORKER_IN_ERROR, PROXY_WORKER_IN_ERROR_FLAG, "Err "}, {PROXY_WORKER_HOT_STANDBY, PROXY_WORKER_HOT_STANDBY_FLAG, "Stby "}, {PROXY_WORKER_FREE, PROXY_WORKER_FREE_FLAG, "Free "}, {0x0, '\0', NULL} }; /* Global balancer counter */ int PROXY_DECLARE_DATA proxy_lb_workers = 0; static int lb_workers_limit = 0; const apr_strmatch_pattern PROXY_DECLARE_DATA *ap_proxy_strmatch_path; const apr_strmatch_pattern PROXY_DECLARE_DATA *ap_proxy_strmatch_domain; extern apr_global_mutex_t *proxy_mutex; 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(apr_status_t) ap_proxy_strncpy(char *dst, const char *src, apr_size_t dlen) { char *thenil; apr_size_t thelen; /* special case handling */ if (!dlen) { /* XXX: APR_ENOSPACE would be better */ return APR_EGENERAL; } if (!src) { *dst = '\0'; return APR_SUCCESS; } thenil = apr_cpystrn(dst, src, dlen); thelen = thenil - dst; if (src[thelen] == '\0') { return APR_SUCCESS; } return APR_EGENERAL; } /* already called in the knowledge that the characters are hex digits */ PROXY_DECLARE(int) ap_proxy_hex2c(const char *x) { int i; #if !APR_CHARSET_EBCDIC int 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 separating '/' */ } /* 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; } PROXY_DECLARE(int) ap_proxyerror(request_rec *r, int statuscode, const char *message) { const char *uri = ap_escape_html(r->pool, r->uri); apr_table_setn(r->notes, "error-notes", apr_pstrcat(r->pool, "The proxy server could not handle the request <em><a href=\"", uri, "\">", ap_escape_html(r->pool, r->method), "&nbsp;", 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", "*"); r->status_line = apr_psprintf(r->pool, "%3.3u Proxy Error", statuscode); ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(00898) "%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 = NULL; 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, APLOGNO(00899) "%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, APLOGNO(00900) "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, APLOGNO(00901) "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, APLOGNO(00902) " 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, APLOGNO(00903) "1)IP-Match: %s[%s] <-> ", host, inet_ntoa(addr)); ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, NULL, APLOGNO(00904) "%s/", inet_ntoa(This->addr)); ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, NULL, APLOGNO(00905) "%s", inet_ntoa(This->mask)); #endif return 1; } #if DEBUGGING else { ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, NULL, APLOGNO(00906) "1)IP-NoMatch: %s[%s] <-> ", host, inet_ntoa(addr)); ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, NULL, APLOGNO(00907) "%s/", inet_ntoa(This->addr)); ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, NULL, APLOGNO(00908) "%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, APLOGNO(00909) "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, APLOGNO(00910) "3)IP-Match: %s[%s] <-> ", host, inet_ntoa(*ip)); ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, NULL, APLOGNO(00911) "%s/", inet_ntoa(This->addr)); ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, NULL, APLOGNO(00912) "%s", inet_ntoa(This->mask)); #endif return 1; } #if DEBUGGING else { ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, NULL, APLOGNO(00913) "3)IP-NoMatch: %s[%s] <-> ", host, inet_ntoa(*ip)); ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, NULL, APLOGNO(00914) "%s/", inet_ntoa(This->addr)); ap_log_error(APLOG_MARK, APLOG_STARTUP, 0, NULL, APLOGNO(00915) "%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; } /* Backwards-compatible interface. */ PROXY_DECLARE(int) ap_proxy_checkproxyblock(request_rec *r, proxy_server_conf *conf, apr_sockaddr_t *uri_addr) { return ap_proxy_checkproxyblock2(r, conf, uri_addr->hostname, uri_addr); } #define MAX_IP_STR_LEN (46) PROXY_DECLARE(int) ap_proxy_checkproxyblock2(request_rec *r, proxy_server_conf *conf, const char *hostname, apr_sockaddr_t *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; ap_log_rerror(APLOG_MARK, APLOG_TRACE2, 0, r, "checking remote machine [%s] against [%s]", hostname, npent[j].name); if (ap_strstr_c(hostname, npent[j].name) || npent[j].name[0] == '*') { ap_log_rerror(APLOG_MARK, APLOG_WARNING, 0, r, APLOGNO(00916) "connect to remote machine %s blocked: name %s " "matched", hostname, npent[j].name); return HTTP_FORBIDDEN; } /* No IP address checks if no IP address was passed in, * i.e. the forward address proxy case, where this server does * not resolve the hostname. */ if (!addr) continue; for (conf_addr = npent[j].addr; conf_addr; conf_addr = conf_addr->next) { char caddr[MAX_IP_STR_LEN], uaddr[MAX_IP_STR_LEN]; apr_sockaddr_t *uri_addr; if (apr_sockaddr_ip_getbuf(caddr, sizeof caddr, conf_addr)) continue; for (uri_addr = addr; uri_addr; uri_addr = uri_addr->next) { if (apr_sockaddr_ip_getbuf(uaddr, sizeof uaddr, uri_addr)) continue; ap_log_rerror(APLOG_MARK, APLOG_TRACE2, 0, r, "ProxyBlock comparing %s and %s", caddr, uaddr); if (!strcmp(caddr, uaddr)) { ap_log_rerror(APLOG_MARK, APLOG_WARNING, 0, r, APLOGNO(00917) "connect to remote machine %s blocked: " "IP %s matched", hostname, caddr); return HTTP_FORBIDDEN; } } } } 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; } PROXY_DECLARE(const char *) ap_proxy_location_reverse_map(request_rec *r, proxy_dir_conf *conf, const char *url) { proxy_req_conf *rconf; struct proxy_alias *ent; int i, l1, l2; char *u; /* * XXX FIXME: Make sure this handled the ambiguous case of the :<PORT> * after the hostname * XXX FIXME: Ensure the /uri component is a case sensitive match */ if (r->proxyreq != PROXYREQ_REVERSE) { return url; } l1 = strlen(url); if (conf->interpolate_env == 1) { rconf = ap_get_module_config(r->request_config, &proxy_module); ent = (struct proxy_alias *)rconf->raliases->elts; } else { ent = (struct proxy_alias *)conf->raliases->elts; } for (i = 0; i < conf->raliases->nelts; i++) { proxy_server_conf *sconf = (proxy_server_conf *) ap_get_module_config(r->server->module_config, &proxy_module); proxy_balancer *balancer; const char *real = ent[i].real; /* * First check if mapping against a balancer and see * if we have such a entity. If so, then we need to * find the particulars of the actual worker which may * or may not be the right one... basically, we need * to find which member actually handled this request. */ if (ap_proxy_valid_balancer_name((char *)real, 0) && (balancer = ap_proxy_get_balancer(r->pool, sconf, real, 1))) { int n, l3 = 0; proxy_worker **worker = (proxy_worker **)balancer->workers->elts; const char *urlpart = ap_strchr_c(real + sizeof(BALANCER_PREFIX) - 1, '/'); if (urlpart) { if (!urlpart[1]) urlpart = NULL; else l3 = strlen(urlpart); } /* The balancer comparison is a bit trickier. Given the context * BalancerMember balancer://alias http://example.com/foo * ProxyPassReverse /bash balancer://alias/bar * translate url http://example.com/foo/bar/that to /bash/that */ for (n = 0; n < balancer->workers->nelts; n++) { l2 = strlen((*worker)->s->name); if (urlpart) { /* urlpart (l3) assuredly starts with its own '/' */ if ((*worker)->s->name[l2 - 1] == '/') --l2; if (l1 >= l2 + l3 && strncasecmp((*worker)->s->name, url, l2) == 0 && strncmp(urlpart, url + l2, l3) == 0) { u = apr_pstrcat(r->pool, ent[i].fake, &url[l2 + l3], NULL); return ap_is_url(u) ? u : ap_construct_url(r->pool, u, r); } } else if (l1 >= l2 && strncasecmp((*worker)->s->name, url, l2) == 0) { /* edge case where fake is just "/"... avoid double slash */ if ((ent[i].fake[0] == '/') && (ent[i].fake[1] == 0) && (url[l2] == '/')) { u = apr_pstrdup(r->pool, &url[l2]); } else { u = apr_pstrcat(r->pool, ent[i].fake, &url[l2], NULL); } return ap_is_url(u) ? u : ap_construct_url(r->pool, u, r); } worker++; } } else { const char *part = url; l2 = strlen(real); if (real[0] == '/') { part = ap_strstr_c(url, "://"); if (part) { part = ap_strchr_c(part+3, '/'); if (part) { l1 = strlen(part); } else { part = url; } } else { part = url; } } if (l1 >= l2 && strncasecmp(real, part, l2) == 0) { u = apr_pstrcat(r->pool, ent[i].fake, &part[l2], NULL); return ap_is_url(u) ? u : ap_construct_url(r->pool, u, r); } } } return url; } /* * Cookies are a bit trickier to match: we've got two substrings to worry * about, and we can't just find them with strstr 'cos of case. Regexp * matching would be an easy fix, but for better consistency with all the * other matches we'll refrain and use apr_strmatch to find path=/domain= * and stick to plain strings for the config values. */ PROXY_DECLARE(const char *) ap_proxy_cookie_reverse_map(request_rec *r, proxy_dir_conf *conf, const char *str) { proxy_req_conf *rconf = ap_get_module_config(r->request_config, &proxy_module); struct proxy_alias *ent; apr_size_t len = strlen(str); const char *newpath = NULL; const char *newdomain = NULL; const char *pathp; const char *domainp; const char *pathe = NULL; const char *domaine = NULL; apr_size_t l1, l2, poffs = 0, doffs = 0; int i; int ddiff = 0; int pdiff = 0; char *ret; if (r->proxyreq != PROXYREQ_REVERSE) { return str; } /* * Find the match and replacement, but save replacing until we've done * both path and domain so we know the new strlen */ if ((pathp = apr_strmatch(ap_proxy_strmatch_path, str, len)) != NULL) { pathp += 5; poffs = pathp - str; pathe = ap_strchr_c(pathp, ';'); l1 = pathe ? (pathe - pathp) : strlen(pathp); pathe = pathp + l1 ; if (conf->interpolate_env == 1) { ent = (struct proxy_alias *)rconf->cookie_paths->elts; } else { ent = (struct proxy_alias *)conf->cookie_paths->elts; } for (i = 0; i < conf->cookie_paths->nelts; i++) { l2 = strlen(ent[i].fake); if (l1 >= l2 && strncmp(ent[i].fake, pathp, l2) == 0) { newpath = ent[i].real; pdiff = strlen(newpath) - l1; break; } } } if ((domainp = apr_strmatch(ap_proxy_strmatch_domain, str, len)) != NULL) { domainp += 7; doffs = domainp - str; domaine = ap_strchr_c(domainp, ';'); l1 = domaine ? (domaine - domainp) : strlen(domainp); domaine = domainp + l1; if (conf->interpolate_env == 1) { ent = (struct proxy_alias *)rconf->cookie_domains->elts; } else { ent = (struct proxy_alias *)conf->cookie_domains->elts; } for (i = 0; i < conf->cookie_domains->nelts; i++) { l2 = strlen(ent[i].fake); if (l1 >= l2 && strncasecmp(ent[i].fake, domainp, l2) == 0) { newdomain = ent[i].real; ddiff = strlen(newdomain) - l1; break; } } } if (newpath) { ret = apr_palloc(r->pool, len + pdiff + ddiff + 1); l1 = strlen(newpath); if (newdomain) { l2 = strlen(newdomain); if (doffs > poffs) { memcpy(ret, str, poffs); memcpy(ret + poffs, newpath, l1); memcpy(ret + poffs + l1, pathe, domainp - pathe); memcpy(ret + doffs + pdiff, newdomain, l2); strcpy(ret + doffs + pdiff + l2, domaine); } else { memcpy(ret, str, doffs) ; memcpy(ret + doffs, newdomain, l2); memcpy(ret + doffs + l2, domaine, pathp - domaine); memcpy(ret + poffs + ddiff, newpath, l1); strcpy(ret + poffs + ddiff + l1, pathe); } } else { memcpy(ret, str, poffs); memcpy(ret + poffs, newpath, l1); strcpy(ret + poffs + l1, pathe); } } else { if (newdomain) { ret = apr_palloc(r->pool, len + pdiff + ddiff + 1); l2 = strlen(newdomain); memcpy(ret, str, doffs); memcpy(ret + doffs, newdomain, l2); strcpy(ret + doffs+l2, domaine); } else { ret = (char *)str; /* no change */ } } return ret; } /* * BALANCER related... */ /* * verifies that the balancer name conforms to standards. */ PROXY_DECLARE(int) ap_proxy_valid_balancer_name(char *name, int i) { if (!i) i = sizeof(BALANCER_PREFIX)-1; return (!strncasecmp(name, BALANCER_PREFIX, i)); } PROXY_DECLARE(proxy_balancer *) ap_proxy_get_balancer(apr_pool_t *p, proxy_server_conf *conf, const char *url, int care) { proxy_balancer *balancer; char *c, *uri = apr_pstrdup(p, url); int i; proxy_hashes hash; c = strchr(uri, ':'); if (c == NULL || c[1] != '/' || c[2] != '/' || c[3] == '\0') { return NULL; } /* remove path from uri */ if ((c = strchr(c + 3, '/'))) { *c = '\0'; } ap_str_tolower(uri); hash.def = ap_proxy_hashfunc(uri, PROXY_HASHFUNC_DEFAULT); hash.fnv = ap_proxy_hashfunc(uri, PROXY_HASHFUNC_FNV); balancer = (proxy_balancer *)conf->balancers->elts; for (i = 0; i < conf->balancers->nelts; i++) { if (balancer->hash.def == hash.def && balancer->hash.fnv == hash.fnv) { if (!care || !balancer->s->inactive) { return balancer; } } balancer++; } return NULL; } PROXY_DECLARE(char *) ap_proxy_update_balancer(apr_pool_t *p, proxy_balancer *balancer, const char *url) { apr_uri_t puri; if (apr_uri_parse(p, url, &puri) != APR_SUCCESS) { return apr_psprintf(p, "unable to parse: %s", url); } if (puri.path && PROXY_STRNCPY(balancer->s->vpath, puri.path) != APR_SUCCESS) { return apr_psprintf(p, "balancer %s front-end virtual-path (%s) too long", balancer->s->name, puri.path); } if (puri.hostname && PROXY_STRNCPY(balancer->s->vhost, puri.hostname) != APR_SUCCESS) { return apr_psprintf(p, "balancer %s front-end vhost name (%s) too long", balancer->s->name, puri.hostname); } return NULL; } #define PROXY_UNSET_NONCE '\n' PROXY_DECLARE(char *) ap_proxy_define_balancer(apr_pool_t *p, proxy_balancer **balancer, proxy_server_conf *conf, const char *url, const char *alias, int do_malloc) { proxy_balancer_method *lbmethod; proxy_balancer_shared *bshared; char *c, *q, *uri = apr_pstrdup(p, url); const char *sname; /* We should never get here without a valid BALANCER_PREFIX... */ c = strchr(uri, ':'); if (c == NULL || c[1] != '/' || c[2] != '/' || c[3] == '\0') return "Bad syntax for a balancer name"; /* remove path from uri */ if ((q = strchr(c + 3, '/'))) *q = '\0'; ap_str_tolower(uri); *balancer = apr_array_push(conf->balancers); memset(*balancer, 0, sizeof(proxy_balancer)); /* * NOTE: The default method is byrequests - if it doesn't * exist, that's OK at this time. We check when we share and sync */ lbmethod = ap_lookup_provider(PROXY_LBMETHOD, "byrequests", "0"); (*balancer)->workers = apr_array_make(p, 5, sizeof(proxy_worker *)); (*balancer)->gmutex = NULL; (*balancer)->tmutex = NULL; (*balancer)->lbmethod = lbmethod; if (do_malloc) bshared = ap_malloc(sizeof(proxy_balancer_shared)); else bshared = apr_palloc(p, sizeof(proxy_balancer_shared)); memset(bshared, 0, sizeof(proxy_balancer_shared)); bshared->was_malloced = (do_malloc != 0); PROXY_STRNCPY(bshared->lbpname, "byrequests"); if (PROXY_STRNCPY(bshared->name, uri) != APR_SUCCESS) { return apr_psprintf(p, "balancer name (%s) too long", uri); } /* * We do the below for verification. The real sname will be * done post_config */ ap_pstr2_alnum(p, bshared->name + sizeof(BALANCER_PREFIX) - 1, &sname); sname = apr_pstrcat(p, conf->id, "_", sname, NULL); if (PROXY_STRNCPY(bshared->sname, sname) != APR_SUCCESS) { return apr_psprintf(p, "balancer safe-name (%s) too long", sname); } bshared->hash.def = ap_proxy_hashfunc(bshared->name, PROXY_HASHFUNC_DEFAULT); bshared->hash.fnv = ap_proxy_hashfunc(bshared->name, PROXY_HASHFUNC_FNV); (*balancer)->hash = bshared->hash; bshared->forcerecovery = 1; bshared->sticky_separator = '.'; *bshared->nonce = PROXY_UNSET_NONCE; /* impossible valid input */ (*balancer)->s = bshared; (*balancer)->sconf = conf; return ap_proxy_update_balancer(p, *balancer, alias); } /* * Create an already defined balancer and free up memory. */ PROXY_DECLARE(apr_status_t) ap_proxy_share_balancer(proxy_balancer *balancer, proxy_balancer_shared *shm, int i) { apr_status_t rv = APR_SUCCESS; proxy_balancer_method *lbmethod; char *action = "copying"; if (!shm || !balancer->s) return APR_EINVAL; if ((balancer->s->hash.def != shm->hash.def) || (balancer->s->hash.fnv != shm->hash.fnv)) { memcpy(shm, balancer->s, sizeof(proxy_balancer_shared)); if (balancer->s->was_malloced) free(balancer->s); } else { action = "re-using"; } balancer->s = shm; balancer->s->index = i; ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, ap_server_conf, APLOGNO(02337) "%s shm[%d] (0x%pp) for %s", action, i, (void *)shm, balancer->s->name); /* the below should always succeed */ lbmethod = ap_lookup_provider(PROXY_LBMETHOD, balancer->s->lbpname, "0"); if (lbmethod) { balancer->lbmethod = lbmethod; } else { ap_log_error(APLOG_MARK, APLOG_CRIT, 0, ap_server_conf, APLOGNO(02432) "Cannot find LB Method: %s", balancer->s->lbpname); return APR_EINVAL; } if (*balancer->s->nonce == PROXY_UNSET_NONCE) { char nonce[APR_UUID_FORMATTED_LENGTH + 1]; apr_uuid_t uuid; /* Retrieve a UUID and store the nonce for the lifetime of * the process. */ apr_uuid_get(&uuid); apr_uuid_format(nonce, &uuid); rv = PROXY_STRNCPY(balancer->s->nonce, nonce); } return rv; } PROXY_DECLARE(apr_status_t) ap_proxy_initialize_balancer(proxy_balancer *balancer, server_rec *s, apr_pool_t *p) { apr_status_t rv = APR_SUCCESS; ap_slotmem_provider_t *storage = balancer->storage; apr_size_t size; unsigned int num; if (!storage) { ap_log_error(APLOG_MARK, APLOG_CRIT, 0, s, APLOGNO(00918) "no provider for %s", balancer->s->name); return APR_EGENERAL; } /* * for each balancer we need to init the global * mutex and then attach to the shared worker shm */ if (!balancer->gmutex) { ap_log_error(APLOG_MARK, APLOG_CRIT, 0, s, APLOGNO(00919) "no mutex %s", balancer->s->name); return APR_EGENERAL; } /* Re-open the mutex for the child. */ rv = apr_global_mutex_child_init(&(balancer->gmutex), apr_global_mutex_lockfile(balancer->gmutex), p); if (rv != APR_SUCCESS) { ap_log_error(APLOG_MARK, APLOG_CRIT, rv, s, APLOGNO(00920) "Failed to reopen mutex %s in child", balancer->s->name); return rv; } /* now attach */ storage->attach(&(balancer->wslot), balancer->s->sname, &size, &num, p); if (!balancer->wslot) { ap_log_error(APLOG_MARK, APLOG_CRIT, 0, s, APLOGNO(00921) "slotmem_attach failed"); return APR_EGENERAL; } if (balancer->lbmethod && balancer->lbmethod->reset) balancer->lbmethod->reset(balancer, s); if (balancer->tmutex == NULL) { rv = apr_thread_mutex_create(&(balancer->tmutex), APR_THREAD_MUTEX_DEFAULT, p); if (rv != APR_SUCCESS) { ap_log_error(APLOG_MARK, APLOG_CRIT, 0, s, APLOGNO(00922) "can not create balancer thread mutex"); return rv; } } return APR_SUCCESS; } /* * CONNECTION related... */ static apr_status_t conn_pool_cleanup(void *theworker) { proxy_worker *worker = (proxy_worker *)theworker; if (worker->cp->res) { worker->cp->pool = NULL; } return APR_SUCCESS; } static void init_conn_pool(apr_pool_t *p, proxy_worker *worker) { apr_pool_t *pool; proxy_conn_pool *cp; /* * Create a connection pool's subpool. * This pool is used for connection recycling. * Once the worker is added it is never removed but * it can be disabled. */ apr_pool_create(&pool, p); apr_pool_tag(pool, "proxy_worker_cp"); /* * Alloc from the same pool as worker. * proxy_conn_pool is permanently attached to the worker. */ cp = (proxy_conn_pool *)apr_pcalloc(p, sizeof(proxy_conn_pool)); cp->pool = pool; worker->cp = cp; } static apr_status_t connection_cleanup(void *theconn) { proxy_conn_rec *conn = (proxy_conn_rec *)theconn; proxy_worker *worker = conn->worker; /* * If the connection pool is NULL the worker * cleanup has been run. Just return. */ if (!worker->cp) { return APR_SUCCESS; } if (conn->r) { apr_pool_destroy(conn->r->pool); conn->r = NULL; } /* Sanity check: Did we already return the pooled connection? */ if (conn->inreslist) { ap_log_perror(APLOG_MARK, APLOG_ERR, 0, conn->pool, APLOGNO(00923) "Pooled connection 0x%pp for worker %s has been" " already returned to the connection pool.", conn, ap_proxy_worker_name(conn->pool, worker)); return APR_SUCCESS; } /* determine if the connection need to be closed */ if (conn->close || !worker->s->is_address_reusable || worker->s->disablereuse) { apr_pool_t *p = conn->pool; apr_pool_clear(p); conn = apr_pcalloc(p, sizeof(proxy_conn_rec)); conn->pool = p; conn->worker = worker; apr_pool_create(&(conn->scpool), p); apr_pool_tag(conn->scpool, "proxy_conn_scpool"); } if (worker->s->hmax && worker->cp->res) { conn->inreslist = 1; apr_reslist_release(worker->cp->res, (void *)conn); } else { worker->cp->conn = conn; } /* Always return the SUCCESS */ return APR_SUCCESS; } static void socket_cleanup(proxy_conn_rec *conn) { conn->sock = NULL; conn->connection = NULL; apr_pool_clear(conn->scpool); } PROXY_DECLARE(apr_status_t) ap_proxy_ssl_connection_cleanup(proxy_conn_rec *conn, request_rec *r) { apr_bucket_brigade *bb; apr_status_t rv; /* * If we have an existing SSL connection it might be possible that the * server sent some SSL message we have not read so far (e.g. an SSL * shutdown message if the server closed the keepalive connection while * the connection was held unused in our pool). * So ensure that if present (=> APR_NONBLOCK_READ) it is read and * processed. We don't expect any data to be in the returned brigade. */ if (conn->sock && conn->connection) { bb = apr_brigade_create(r->pool, r->connection->bucket_alloc); rv = ap_get_brigade(conn->connection->input_filters, bb, AP_MODE_READBYTES, APR_NONBLOCK_READ, HUGE_STRING_LEN); if ((rv != APR_SUCCESS) && !APR_STATUS_IS_EAGAIN(rv)) { socket_cleanup(conn); } if (!APR_BRIGADE_EMPTY(bb)) { apr_off_t len; rv = apr_brigade_length(bb, 0, &len); ap_log_rerror(APLOG_MARK, APLOG_TRACE3, rv, r, "SSL cleanup brigade contained %" APR_OFF_T_FMT " bytes of data.", len); } apr_brigade_destroy(bb); } return APR_SUCCESS; } /* reslist constructor */ static apr_status_t connection_constructor(void **resource, void *params, apr_pool_t *pool) { apr_pool_t *ctx; apr_pool_t *scpool; proxy_conn_rec *conn; proxy_worker *worker = (proxy_worker *)params; /* * Create the subpool for each connection * This keeps the memory consumption constant * when disconnecting from backend. */ apr_pool_create(&ctx, pool); apr_pool_tag(ctx, "proxy_conn_pool"); /* * Create another subpool that manages the data for the * socket and the connection member of the proxy_conn_rec struct as we * destroy this data more frequently than other data in the proxy_conn_rec * struct like hostname and addr (at least in the case where we have * keepalive connections that timed out). */ apr_pool_create(&scpool, ctx); apr_pool_tag(scpool, "proxy_conn_scpool"); conn = apr_pcalloc(ctx, sizeof(proxy_conn_rec)); conn->pool = ctx; conn->scpool = scpool; conn->worker = worker; conn->inreslist = 1; *resource = conn; return APR_SUCCESS; } /* reslist destructor */ static apr_status_t connection_destructor(void *resource, void *params, apr_pool_t *pool) { proxy_conn_rec *conn = (proxy_conn_rec *)resource; /* Destroy the pool only if not called from reslist_destroy */ if (conn->worker->cp->pool) { apr_pool_destroy(conn->pool); } return APR_SUCCESS; } /* * WORKER related... */ PROXY_DECLARE(char *) ap_proxy_worker_name(apr_pool_t *p, proxy_worker *worker) { if (!(*worker->s->uds_path) || !p) { /* just in case */ return worker->s->name; } return apr_pstrcat(p, "unix:", worker->s->uds_path, "|", worker->s->name, NULL); } PROXY_DECLARE(proxy_worker *) ap_proxy_get_worker(apr_pool_t *p, proxy_balancer *balancer, proxy_server_conf *conf, const char *url) { proxy_worker *worker; proxy_worker *max_worker = NULL; int max_match = 0; int url_length; int min_match; int worker_name_length; const char *c; char *url_copy; int i; if (!url) { return NULL; } c = ap_strchr_c(url, ':'); if (c == NULL || c[1] != '/' || c[2] != '/' || c[3] == '\0') { return NULL; } url_length = strlen(url); url_copy = apr_pstrmemdup(p, url, url_length); /* * We need to find the start of the path and * therefore we know the length of the scheme://hostname/ * part to we can force-lowercase everything up to * the start of the path. */ c = ap_strchr_c(c+3, '/'); if (c) { char *pathstart; pathstart = url_copy + (c - url); *pathstart = '\0'; ap_str_tolower(url_copy); min_match = strlen(url_copy); *pathstart = '/'; } else { ap_str_tolower(url_copy); min_match = strlen(url_copy); } /* * Do a "longest match" on the worker name to find the worker that * fits best to the URL, but keep in mind that we must have at least * a minimum matching of length min_match such that * scheme://hostname[:port] matches between worker and url. */ if (balancer) { proxy_worker **workers = (proxy_worker **)balancer->workers->elts; for (i = 0; i < balancer->workers->nelts; i++, workers++) { worker = *workers; if ( ((worker_name_length = strlen(worker->s->name)) <= url_length) && (worker_name_length >= min_match) && (worker_name_length > max_match) && (strncmp(url_copy, worker->s->name, worker_name_length) == 0) ) { max_worker = worker; max_match = worker_name_length; } } } else { worker = (proxy_worker *)conf->workers->elts; for (i = 0; i < conf->workers->nelts; i++, worker++) { if ( ((worker_name_length = strlen(worker->s->name)) <= url_length) && (worker_name_length >= min_match) && (worker_name_length > max_match) && (strncmp(url_copy, worker->s->name, worker_name_length) == 0) ) { max_worker = worker; max_match = worker_name_length; } } } return max_worker; } /* * To create a worker from scratch first we define the * specifics of the worker; this is all local data. * We then allocate space for it if data needs to be * shared. This allows for dynamic addition during * config and runtime. */ PROXY_DECLARE(char *) ap_proxy_define_worker(apr_pool_t *p, proxy_worker **worker, proxy_balancer *balancer, proxy_server_conf *conf, const char *url, int do_malloc) { int rv; apr_uri_t uri, urisock; proxy_worker_shared *wshared; char *ptr, *sockpath = NULL; /* * Look to see if we are using UDS: * require format: unix:/path/foo/bar.sock|http://ignored/path2/ * This results in talking http to the socket at /path/foo/bar.sock */ ptr = ap_strchr((char *)url, '|'); if (ptr) { *ptr = '\0'; rv = apr_uri_parse(p, url, &urisock); if (rv == APR_SUCCESS && !strcasecmp(urisock.scheme, "unix")) { sockpath = ap_runtime_dir_relative(p, urisock.path);; url = ptr+1; /* so we get the scheme for the uds */ } else { *ptr = '|'; } } rv = apr_uri_parse(p, url, &uri); if (rv != APR_SUCCESS) { return apr_pstrcat(p, "Unable to parse URL: ", url, NULL); } if (!uri.scheme) { return apr_pstrcat(p, "URL must be absolute!: ", url, NULL); } /* allow for unix:/path|http: */ if (!uri.hostname) { if (sockpath) { uri.hostname = "localhost"; } else { return apr_pstrcat(p, "URL must be absolute!: ", url, NULL); } } else { ap_str_tolower(uri.hostname); } ap_str_tolower(uri.scheme); /* * Workers can be associated w/ balancers or on their * own; ie: the generic reverse-proxy or a worker * in a simple ProxyPass statement. eg: * * ProxyPass / http://www.example.com * * in which case the worker goes in the conf slot. */ if (balancer) { proxy_worker **runtime; /* recall that we get a ptr to the ptr here */ runtime = apr_array_push(balancer->workers); *worker = *runtime = apr_palloc(p, sizeof(proxy_worker)); /* right to left baby */ /* we've updated the list of workers associated with * this balancer *locally* */ balancer->wupdated = apr_time_now(); } else if (conf) { *worker = apr_array_push(conf->workers); } else { /* we need to allocate space here */ *worker = apr_palloc(p, sizeof(proxy_worker)); } memset(*worker, 0, sizeof(proxy_worker)); /* right here we just want to tuck away the worker info. * if called during config, we don't have shm setup yet, * so just note the info for later. */ if (do_malloc) wshared = ap_malloc(sizeof(proxy_worker_shared)); /* will be freed ap_proxy_share_worker */ else wshared = apr_palloc(p, sizeof(proxy_worker_shared)); memset(wshared, 0, sizeof(proxy_worker_shared)); ptr = apr_uri_unparse(p, &uri, APR_URI_UNP_REVEALPASSWORD); if (PROXY_STRNCPY(wshared->name, ptr) != APR_SUCCESS) { return apr_psprintf(p, "worker name (%s) too long", ptr); } if (PROXY_STRNCPY(wshared->scheme, uri.scheme) != APR_SUCCESS) { return apr_psprintf(p, "worker scheme (%s) too long", uri.scheme); } if (PROXY_STRNCPY(wshared->hostname, uri.hostname) != APR_SUCCESS) { return apr_psprintf(p, "worker hostname (%s) too long", uri.hostname); } wshared->port = uri.port; wshared->flush_packets = flush_off; wshared->flush_wait = PROXY_FLUSH_WAIT; wshared->is_address_reusable = 1; wshared->lbfactor = 1; wshared->smax = -1; wshared->hash.def = ap_proxy_hashfunc(wshared->name, PROXY_HASHFUNC_DEFAULT); wshared->hash.fnv = ap_proxy_hashfunc(wshared->name, PROXY_HASHFUNC_FNV); wshared->was_malloced = (do_malloc != 0); if (sockpath) { if (PROXY_STRNCPY(wshared->uds_path, sockpath) != APR_SUCCESS) { return apr_psprintf(p, "worker uds path (%s) too long", sockpath); } } else { *wshared->uds_path = '\0'; } (*worker)->hash = wshared->hash; (*worker)->context = NULL; (*worker)->cp = NULL; (*worker)->balancer = balancer; (*worker)->s = wshared; return NULL; } /* * Create an already defined worker and free up memory */ PROXY_DECLARE(apr_status_t) ap_proxy_share_worker(proxy_worker *worker, proxy_worker_shared *shm, int i) { char *action = "copying"; if (!shm || !worker->s) return APR_EINVAL; if ((worker->s->hash.def != shm->hash.def) || (worker->s->hash.fnv != shm->hash.fnv)) { memcpy(shm, worker->s, sizeof(proxy_worker_shared)); if (worker->s->was_malloced) free(worker->s); /* was malloced in ap_proxy_define_worker */ } else { action = "re-using"; } worker->s = shm; worker->s->index = i; { apr_pool_t *pool; apr_pool_create(&pool, ap_server_conf->process->pool); ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, ap_server_conf, APLOGNO(02338) "%s shm[%d] (0x%pp) for worker: %s", action, i, (void *)shm, ap_proxy_worker_name(pool, worker)); if (pool) { apr_pool_destroy(pool); } } return APR_SUCCESS; } PROXY_DECLARE(apr_status_t) ap_proxy_initialize_worker(proxy_worker *worker, server_rec *s, apr_pool_t *p) { apr_status_t rv = APR_SUCCESS; int mpm_threads; if (worker->s->status & PROXY_WORKER_INITIALIZED) { /* The worker is already initialized */ ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, s, APLOGNO(00924) "worker %s shared already initialized", ap_proxy_worker_name(p, worker)); } else { ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, s, APLOGNO(00925) "initializing worker %s shared", ap_proxy_worker_name(p, worker)); /* Set default parameters */ if (!worker->s->retry_set) { worker->s->retry = apr_time_from_sec(PROXY_WORKER_DEFAULT_RETRY); } /* By default address is reusable unless DisableReuse is set */ if (worker->s->disablereuse) { worker->s->is_address_reusable = 0; } else { worker->s->is_address_reusable = 1; } ap_mpm_query(AP_MPMQ_MAX_THREADS, &mpm_threads); if (mpm_threads > 1) { /* Set hard max to no more then mpm_threads */ if (worker->s->hmax == 0 || worker->s->hmax > mpm_threads) { worker->s->hmax = mpm_threads; } if (worker->s->smax == -1 || worker->s->smax > worker->s->hmax) { worker->s->smax = worker->s->hmax; } /* Set min to be lower then smax */ if (worker->s->min > worker->s->smax) { worker->s->min = worker->s->smax; } } else { /* This will supress the apr_reslist creation */ worker->s->min = worker->s->smax = worker->s->hmax = 0; } } /* What if local is init'ed and shm isn't?? Even possible? */ if (worker->local_status & PROXY_WORKER_INITIALIZED) { ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, s, APLOGNO(00926) "worker %s local already initialized", ap_proxy_worker_name(p, worker)); } else { ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, s, APLOGNO(00927) "initializing worker %s local", ap_proxy_worker_name(p, worker)); apr_global_mutex_lock(proxy_mutex); /* Now init local worker data */ if (worker->tmutex == NULL) { rv = apr_thread_mutex_create(&(worker->tmutex), APR_THREAD_MUTEX_DEFAULT, p); if (rv != APR_SUCCESS) { ap_log_error(APLOG_MARK, APLOG_ERR, 0, s, APLOGNO(00928) "can not create worker thread mutex"); apr_global_mutex_unlock(proxy_mutex); return rv; } } if (worker->cp == NULL) init_conn_pool(p, worker); if (worker->cp == NULL) { ap_log_error(APLOG_MARK, APLOG_ERR, 0, s, APLOGNO(00929) "can not create connection pool"); apr_global_mutex_unlock(proxy_mutex); return APR_EGENERAL; } if (worker->s->hmax) { rv = apr_reslist_create(&(worker->cp->res), worker->s->min, worker->s->smax, worker->s->hmax, worker->s->ttl, connection_constructor, connection_destructor, worker, worker->cp->pool); apr_pool_cleanup_register(worker->cp->pool, (void *)worker, conn_pool_cleanup, apr_pool_cleanup_null); ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, s, APLOGNO(00930) "initialized pool in child %" APR_PID_T_FMT " for (%s) min=%d max=%d smax=%d", getpid(), worker->s->hostname, worker->s->min, worker->s->hmax, worker->s->smax); /* Set the acquire timeout */ if (rv == APR_SUCCESS && worker->s->acquire_set) { apr_reslist_timeout_set(worker->cp->res, worker->s->acquire); } } else { void *conn; rv = connection_constructor(&conn, worker, worker->cp->pool); worker->cp->conn = conn; ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, s, APLOGNO(00931) "initialized single connection worker in child %" APR_PID_T_FMT " for (%s)", getpid(), worker->s->hostname); } apr_global_mutex_unlock(proxy_mutex); } if (rv == APR_SUCCESS) { worker->s->status |= (PROXY_WORKER_INITIALIZED); worker->local_status |= (PROXY_WORKER_INITIALIZED); } return rv; } static int ap_proxy_retry_worker(const char *proxy_function, proxy_worker *worker, server_rec *s) { if (worker->s->status & PROXY_WORKER_IN_ERROR) { if (apr_time_now() > worker->s->error_time + worker->s->retry) { ++worker->s->retries; worker->s->status &= ~PROXY_WORKER_IN_ERROR; ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, s, APLOGNO(00932) "%s: worker for (%s) has been marked for retry", proxy_function, worker->s->hostname); return OK; } else { ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, s, APLOGNO(00933) "%s: too soon to retry worker for (%s)", proxy_function, worker->s->hostname); return DECLINED; } } else { return OK; } } PROXY_DECLARE(int) ap_proxy_pre_request(proxy_worker **worker, proxy_balancer **balancer, request_rec *r, proxy_server_conf *conf, char **url) { int access_status; access_status = proxy_run_pre_request(worker, balancer, r, conf, url); if (access_status == DECLINED && *balancer == NULL) { *worker = ap_proxy_get_worker(r->pool, NULL, conf, *url); if (*worker) { ap_log_rerror(APLOG_MARK, APLOG_TRACE2, 0, r, "%s: found worker %s for %s", (*worker)->s->scheme, (*worker)->s->name, *url); *balancer = NULL; access_status = OK; } else if (r->proxyreq == PROXYREQ_PROXY) { if (conf->forward) { ap_log_rerror(APLOG_MARK, APLOG_TRACE2, 0, r, "*: found forward proxy worker for %s", *url); *balancer = NULL; *worker = conf->forward; access_status = OK; /* * The forward worker does not keep connections alive, so * ensure that mod_proxy_http does the correct thing * regarding the Connection header in the request. */ apr_table_setn(r->subprocess_env, "proxy-nokeepalive", "1"); } } else if (r->proxyreq == PROXYREQ_REVERSE) { if (conf->reverse) { ap_log_rerror(APLOG_MARK, APLOG_TRACE2, 0, r, "*: found reverse proxy worker for %s", *url); *balancer = NULL; *worker = conf->reverse; access_status = OK; /* * The reverse worker does not keep connections alive, so * ensure that mod_proxy_http does the correct thing * regarding the Connection header in the request. */ apr_table_setn(r->subprocess_env, "proxy-nokeepalive", "1"); } } } else if (access_status == DECLINED && *balancer != NULL) { /* All the workers are busy */ ap_log_rerror(APLOG_MARK, APLOG_ERR, 0, r, APLOGNO(00934) "all workers are busy. Unable to serve %s", *url); access_status = HTTP_SERVICE_UNAVAILABLE; } return access_status; } PROXY_DECLARE(int) ap_proxy_post_request(proxy_worker *worker, proxy_balancer *balancer, request_rec *r, proxy_server_conf *conf) { int access_status = OK; if (balancer) { access_status = proxy_run_post_request(worker, balancer, r, conf); if (access_status == DECLINED) { access_status = OK; /* no post_request handler available */ /* TODO: recycle direct worker */ } } return access_status; } /* DEPRECATED */ 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, request_rec *r) { apr_status_t rv; int connected = 0; int loglevel; while (backend_addr && !connected) { if ((rv = apr_socket_create(newsock, backend_addr->family, SOCK_STREAM, 0, r->pool)) != APR_SUCCESS) { loglevel = backend_addr->next ? APLOG_DEBUG : APLOG_ERR; ap_log_rerror(APLOG_MARK, loglevel, rv, r, APLOGNO(00935) "%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 * local machine won't give us an IPv6 socket; hopefully the * DNS returned an additional address to try */ backend_addr = backend_addr->next; continue; } if (conf->recv_buffer_size > 0 && (rv = apr_socket_opt_set(*newsock, APR_SO_RCVBUF, conf->recv_buffer_size))) { ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r, APLOGNO(00936) "apr_socket_opt_set(SO_RCVBUF): Failed to set " "ProxyReceiveBufferSize, using default"); } rv = apr_socket_opt_set(*newsock, APR_TCP_NODELAY, 1); if (rv != APR_SUCCESS && rv != APR_ENOTIMPL) { ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r, APLOGNO(00937) "apr_socket_opt_set(APR_TCP_NODELAY): " "Failed to set"); } /* Set a timeout on the socket */ if (conf->timeout_set) { apr_socket_timeout_set(*newsock, conf->timeout); } else { apr_socket_timeout_set(*newsock, r->server->timeout); } ap_log_rerror(APLOG_MARK, APLOG_TRACE2, 0, r, "%s: fam %d socket created to connect to %s", proxy_function, backend_addr->family, backend_name); if (conf->source_address) { rv = apr_socket_bind(*newsock, conf->source_address); if (rv != APR_SUCCESS) { ap_log_rerror(APLOG_MARK, APLOG_ERR, rv, r, APLOGNO(00938) "%s: failed to bind socket to local address", proxy_function); } } /* make the connection out of the socket */ rv = apr_socket_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_rerror(APLOG_MARK, loglevel, rv, r, APLOGNO(00939) "%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; } PROXY_DECLARE(int) ap_proxy_acquire_connection(const char *proxy_function, proxy_conn_rec **conn, proxy_worker *worker, server_rec *s) { apr_status_t rv; if (!PROXY_WORKER_IS_USABLE(worker)) { /* Retry the worker */ ap_proxy_retry_worker(proxy_function, worker, s); if (!PROXY_WORKER_IS_USABLE(worker)) { ap_log_error(APLOG_MARK, APLOG_ERR, 0, s, APLOGNO(00940) "%s: disabled connection for (%s)", proxy_function, worker->s->hostname); return HTTP_SERVICE_UNAVAILABLE; } } if (worker->s->hmax && worker->cp->res) { rv = apr_reslist_acquire(worker->cp->res, (void **)conn); } else { /* create the new connection if the previous was destroyed */ if (!worker->cp->conn) { connection_constructor((void **)conn, worker, worker->cp->pool); } else { *conn = worker->cp->conn; worker->cp->conn = NULL; } rv = APR_SUCCESS; } if (rv != APR_SUCCESS) { ap_log_error(APLOG_MARK, APLOG_ERR, rv, s, APLOGNO(00941) "%s: failed to acquire connection for (%s)", proxy_function, worker->s->hostname); return HTTP_SERVICE_UNAVAILABLE; } ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, s, APLOGNO(00942) "%s: has acquired connection for (%s)", proxy_function, worker->s->hostname); (*conn)->worker = worker; (*conn)->close = 0; (*conn)->inreslist = 0; if (*worker->s->uds_path) { if ((*conn)->uds_path == NULL) { /* use (*conn)->pool instead of worker->cp->pool to match lifetime */ (*conn)->uds_path = apr_pstrdup((*conn)->pool, worker->s->uds_path); } if ((*conn)->uds_path) { ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, s, APLOGNO(02545) "%s: has determined UDS as %s", proxy_function, (*conn)->uds_path); } else { /* should never happen */ ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, s, APLOGNO(02546) "%s: cannot determine UDS (%s)", proxy_function, worker->s->uds_path); } } else { (*conn)->uds_path = NULL; } return OK; } PROXY_DECLARE(int) ap_proxy_release_connection(const char *proxy_function, proxy_conn_rec *conn, server_rec *s) { ap_log_error(APLOG_MARK, APLOG_DEBUG, 0, s, APLOGNO(00943) "%s: has released connection for (%s)", proxy_function, conn->worker->s->hostname); connection_cleanup(conn); return OK; } PROXY_DECLARE(int) ap_proxy_determine_connection(apr_pool_t *p, request_rec *r, proxy_server_conf *conf, proxy_worker *worker, proxy_conn_rec *conn, apr_uri_t *uri, char **url, const char *proxyname, apr_port_t proxyport, char *server_portstr, int server_portstr_size) { int server_port; apr_status_t err = APR_SUCCESS; apr_status_t uerr = APR_SUCCESS; /* * Break up the URL to determine the host to connect to */ /* we break the URL into host, port, uri */ if (APR_SUCCESS != apr_uri_parse(p, *url, uri)) { return ap_proxyerror(r, HTTP_BAD_REQUEST, apr_pstrcat(p,"URI cannot be parsed: ", *url, NULL)); } if (!uri->port) { uri->port = ap_proxy_port_of_scheme(uri->scheme); } ap_log_rerror(APLOG_MARK, APLOG_DEBUG, 0, r, APLOGNO(00944) "connecting %s to %s:%d", *url, uri->hostname, uri->port); /* * allocate these out of the specified connection pool * The scheme handler decides if this is permanent or * short living pool. */ /* are we connecting directly, or via a proxy? */ if (!proxyname) { *url = apr_pstrcat(p, uri->path, uri->query ? "?" : "", uri->query ? uri->query : "", uri->fragment ? "#" : "", uri->fragment ? uri->fragment : "", NULL); } /* * Figure out if our passed in proxy_conn_rec has a usable * address cached. * * TODO: Handle this much better... * * XXX: If generic workers are ever address-reusable, we need * to check host and port on the conn and be careful about * spilling the cached addr from the worker. */ if (!conn->hostname || !worker->s->is_address_reusable || worker->s->disablereuse || *worker->s->uds_path) { if (proxyname) { conn->hostname = apr_pstrdup(conn->pool, proxyname); conn->port = proxyport; /* * If we have a forward proxy and the protocol is HTTPS, * then we need to prepend a HTTP CONNECT request before * sending our actual HTTPS requests. * Save our real backend data for using it later during HTTP CONNECT. */ if (conn->is_ssl) { const char *proxy_auth; forward_info *forward = apr_pcalloc(conn->pool, sizeof(forward_info)); conn->forward = forward; forward->use_http_connect = 1; forward->target_host = apr_pstrdup(conn->pool, uri->hostname); forward->target_port = uri->port; /* Do we want to pass Proxy-Authorization along? * If we haven't used it, then YES * If we have used it then MAYBE: RFC2616 says we MAY propagate it. * So let's make it configurable by env. * The logic here is the same used in mod_proxy_http. */ proxy_auth = apr_table_get(r->headers_in, "Proxy-Authorization"); if (proxy_auth != NULL && proxy_auth[0] != '\0' && r->user == NULL && /* we haven't yet authenticated */ apr_table_get(r->subprocess_env, "Proxy-Chain-Auth")) { forward->proxy_auth = apr_pstrdup(conn->pool, proxy_auth); } } } else { conn->hostname = apr_pstrdup(conn->pool, uri->hostname); conn->port = uri->port; } socket_cleanup(conn); if (!(*worker->s->uds_path) && (!worker->s->is_address_reusable || worker->s->disablereuse)) { /* * Only do a lookup if we should not reuse the backend address. * Otherwise we will look it up once for the worker. */ err = apr_sockaddr_info_get(&(conn->addr), conn->hostname, APR_UNSPEC, conn->port, 0, conn->pool); } } if (!(*worker->s->uds_path) && worker->s->is_address_reusable && !worker->s->disablereuse) { /* * Looking up the backend address for
{'avg_line_length': 34.94035496072156, 'max_line_length': 122, 'alphanum_fraction': 0.5360562911149971, 'licenses': ['Apache-2.0'], 'repository_name': 'Teemperor/CifExamples', 'path': 'apache/modules/proxy/proxy_util.c', 'size': 120090, 'lang': 'C'}