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config.c
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config.c
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/*
* Pound - the reverse-proxy load-balancer
* Copyright (C) 2002-2010 Apsis GmbH
*
* This file is part of Pound.
*
* Pound 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 3 of the License, or
* (at your option) any later version.
*
* Pound 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, see <http://www.gnu.org/licenses/>.
*
* Contact information:
* Apsis GmbH
* P.O.Box
* 8707 Uetikon am See
* Switzerland
* EMail: roseg@apsis.ch
*/
#ifndef MISS_FACILITYNAMES
#define SYSLOG_NAMES 1
#endif
#include "pound.h"
#include <openssl/x509v3.h>
#ifdef MISS_FACILITYNAMES
/* This is lifted verbatim from the Linux sys/syslog.h */
typedef struct _code {
char *c_name;
int c_val;
} CODE;
static CODE facilitynames[] = {
{ "auth", LOG_AUTH },
#ifdef LOG_AUTHPRIV
{ "authpriv", LOG_AUTHPRIV },
#endif
{ "cron", LOG_CRON },
{ "daemon", LOG_DAEMON },
#ifdef LOG_FTP
{ "ftp", LOG_FTP },
#endif
{ "kern", LOG_KERN },
{ "lpr", LOG_LPR },
{ "mail", LOG_MAIL },
{ "mark", 0 }, /* never used! */
{ "news", LOG_NEWS },
{ "security", LOG_AUTH }, /* DEPRECATED */
{ "syslog", LOG_SYSLOG },
{ "user", LOG_USER },
{ "uucp", LOG_UUCP },
{ "local0", LOG_LOCAL0 },
{ "local1", LOG_LOCAL1 },
{ "local2", LOG_LOCAL2 },
{ "local3", LOG_LOCAL3 },
{ "local4", LOG_LOCAL4 },
{ "local5", LOG_LOCAL5 },
{ "local6", LOG_LOCAL6 },
{ "local7", LOG_LOCAL7 },
{ NULL, -1 }
};
#endif
static regex_t Empty, Comment, User, Group, Name, RootJail, Daemon, LogFacility,
LogLevel, Alive, SSLEngine, Control;
#if WAF
static regex_t WafRules, Waf_body_size;
#endif
static regex_t ListenHTTP, ListenHTTPS, End, Address, Port, Cert, CertDir,
xHTTP, Client, CheckURL;
static regex_t Err414, Err500, Err501, Err503, ErrNoSsl, NoSslRedirect,
MaxRequest, HeadRemove, RemoveResponseHead, RewriteLocation,
RewriteDestination, ForwardSNI;
static regex_t Service, ServiceName, URL, OrURLs, HeadRequire, HeadDeny,
BackEnd, Emergency, Priority, HAport, HAportAddr, StrictTransportSecurity;
static regex_t Redirect, TimeOut, WSTimeOut, Session, Type, TTL, ID, DynScale;
static regex_t ClientCert, AddHeader, AddResponseHeader, DisableProto,
SSLAllowClientRenegotiation, SSLHonorCipherOrder, Ciphers;
static regex_t CAlist, VerifyList, CRLlist, NoHTTPS11, Grace, ConnTO,
IgnoreCase, Ignore100continue, HTTPS;
static regex_t Disabled, Threads, CNName, Anonymise, DHParams, ECDHCurve;
static regex_t ControlGroup, ControlUser, ControlMode;
static regex_t ThreadModel;
static regex_t ForceHTTP10, SSLUncleanShutdown;
static regex_t BackendKey, BackendCookie;
static regmatch_t matches[5];
static DH *DHCustom_params;
static char *xhttp[] = {
"^(GET|POST|HEAD) ([^ ]+) HTTP/1.[01]$",
"^(GET|POST|HEAD|PUT|PATCH|DELETE) ([^ ]+) HTTP/1.[01]$",
"^(GET|POST|HEAD|PUT|PATCH|DELETE|LOCK|UNLOCK|PROPFIND|PROPPATCH|SEARCH|MKCOL|MKCALENDAR|MOVE|COPY|OPTIONS|TRACE|MKACTIVITY|CHECKOUT|MERGE|REPORT) ([^ ]+) HTTP/1.[01]$",
"^(GET|POST|HEAD|PUT|PATCH|DELETE|LOCK|UNLOCK|PROPFIND|PROPPATCH|SEARCH|MKCOL|MKCALENDAR|MOVE|COPY|OPTIONS|TRACE|MKACTIVITY|CHECKOUT|MERGE|REPORT|SUBSCRIBE|UNSUBSCRIBE|BPROPPATCH|POLL|BMOVE|BCOPY|BDELETE|BPROPFIND|NOTIFY|CONNECT) ([^ ]+) HTTP/1.[01]$",
"^(GET|POST|HEAD|PUT|PATCH|DELETE|LOCK|UNLOCK|PROPFIND|PROPPATCH|SEARCH|MKCOL|MKCALENDAR|MOVE|COPY|OPTIONS|TRACE|MKACTIVITY|CHECKOUT|MERGE|REPORT|SUBSCRIBE|UNSUBSCRIBE|BPROPPATCH|POLL|BMOVE|BCOPY|BDELETE|BPROPFIND|NOTIFY|CONNECT|RPC_IN_DATA|RPC_OUT_DATA|VERSION-CONTROL) ([^ ]+) HTTP/1.[01]$",
"^(GET|POST|HEAD|PUT|PATCH|DELETE|OPTIONS) ([^ ]+) HTTP/1.[01]$",
};
static int log_level = 1;
static int def_facility = LOG_DAEMON;
static int clnt_to = 10;
static int be_to = 15;
static int ws_to = 600;
static int be_connto = 15;
static int dynscale = 0;
static int ignore_case = 0;
static int auto_ecdhcurve = 1;
#if OPENSSL_VERSION_NUMBER >= 0x0090800fL
#ifndef OPENSSL_NO_ECDH
static int EC_nid = NID_X9_62_prime256v1;
#endif
#endif
#define MAX_FIN 100
static FILE *f_in[MAX_FIN];
static char *f_name[MAX_FIN];
static int n_lin[MAX_FIN];
static int cur_fin;
static void load_cert(int has_other, LISTENER * res, char *filename);
static void load_certdir(int has_other, LISTENER * res, const char *dir_path);
static int conf_init(const char *name)
{
if ((f_name[0] = strdup(name)) == NULL) {
logmsg(LOG_ERR, "open %s: out of memory", name);
exit(1);
}
if ((f_in[0] = fopen(name, "rt")) == NULL) {
logmsg(LOG_ERR, "can't open open %s", name);
exit(1);
}
n_lin[0] = 0;
cur_fin = 0;
return 0;
}
void conf_err(const char *msg)
{
logmsg(LOG_ERR, "%s line %d: %s", f_name[cur_fin], n_lin[cur_fin], msg);
exit(1);
}
static char *conf_fgets(char *buf, const int max)
{
int i;
for (;;) {
if (fgets(buf, max, f_in[cur_fin]) == NULL) {
fclose(f_in[cur_fin]);
free(f_name[cur_fin]);
if (cur_fin > 0) {
cur_fin--;
continue;
} else
return NULL;
}
n_lin[cur_fin]++;
for (i = 0; i < max; i++)
if (buf[i] == '\n' || buf[i] == '\r') {
buf[i] = '\0';
break;
}
if (!regexec(&Empty, buf, 4, matches, 0)
|| !regexec(&Comment, buf, 4, matches, 0))
/* comment or empty line */
continue;
return buf;
}
}
#if OPENSSL_VERSION_NUMBER >= 0x10100000L
#define general_name_string(n) \
strndup(ASN1_STRING_get0_data(n->d.dNSName), \
ASN1_STRING_length(n->d.dNSName) + 1)
#else
#define general_name_string(n) \
strndup(ASN1_STRING_data(n->d.dNSName), \
ASN1_STRING_length(n->d.dNSName) + 1)
#endif
unsigned char **get_subjectaltnames(X509 * x509, unsigned int *count)
{
unsigned int local_count;
unsigned char **result;
STACK_OF(GENERAL_NAME) * san_stack =
(STACK_OF(GENERAL_NAME) *) X509_get_ext_d2i(x509, NID_subject_alt_name,
NULL, NULL);
unsigned char *temp[sk_GENERAL_NAME_num(san_stack)];
GENERAL_NAME *name;
int i;
local_count = 0;
result = NULL;
name = NULL;
*count = 0;
if (san_stack == NULL)
return NULL;
while (sk_GENERAL_NAME_num(san_stack) > 0) {
name = sk_GENERAL_NAME_pop(san_stack);
switch (name->type) {
case GEN_DNS:
temp[local_count] =
strndup(ASN1_STRING_get0_data(name->d.dNSName),
ASN1_STRING_length(name->d.dNSName)
+ 1);
if (temp[local_count] == NULL)
conf_err("out of memory");
local_count++;
break;
default:
logmsg(LOG_INFO, "unsupported subjectAltName type encountered: %i",
name->type);
}
GENERAL_NAME_free(name);
}
result = (unsigned char **) malloc(sizeof(unsigned char *) * local_count);
if (result == NULL)
conf_err("out of memory");
for (i = 0; i < local_count; i++) {
result[i] = strndup(temp[i], strlen(temp[i]) + 1);
if (result[i] == NULL)
conf_err("out of memory");
free(temp[i]);
}
*count = local_count;
sk_GENERAL_NAME_pop_free(san_stack, GENERAL_NAME_free);
return result;
}
/*
* parse a back-end
*/
static BACKEND *parse_be(const int is_emergency)
{
char lin[MAXBUF];
char *cp;
BACKEND *res;
int has_addr, has_port;
struct hostent *host;
struct sockaddr_in in;
struct sockaddr_in6 in6;
if ((res = (BACKEND *) malloc(sizeof(BACKEND))) == NULL)
conf_err("BackEnd config: out of memory - aborted");
memset(res, 0, sizeof(BACKEND));
res->be_type = 0;
res->addr.ai_socktype = SOCK_STREAM;
res->to = is_emergency ? 120 : be_to;
res->conn_to = is_emergency ? 120 : be_connto;
res->ws_to = is_emergency ? 120 : ws_to;
res->alive = 1;
memset(&res->addr, 0, sizeof(res->addr));
res->priority = 5;
memset(&res->ha_addr, 0, sizeof(res->ha_addr));
res->url = NULL;
res->bekey = NULL;
res->connections;
res->ecdhcurve_EC_nid = 0;
res->next = NULL;
has_addr = has_port = 0;
pthread_mutex_init(&res->mut, NULL);
while (conf_fgets(lin, MAXBUF)) {
if (strlen(lin) > 0 && lin[strlen(lin) - 1] == '\n')
lin[strlen(lin) - 1] = '\0';
if (!regexec(&Address, lin, 4, matches, 0)) {
lin[matches[1].rm_eo] = '\0';
if (get_host(lin + matches[1].rm_so, &res->addr, PF_UNSPEC)) {
/* if we can't resolve it assume this is a UNIX domain socket */
res->addr.ai_socktype = SOCK_STREAM;
res->addr.ai_family = AF_UNIX;
res->addr.ai_protocol = 0;
if ((res->addr.ai_addr =
(struct sockaddr *) malloc(sizeof(struct sockaddr_un))) == NULL)
conf_err("out of memory");
if ((strlen(lin + matches[1].rm_so) + 1) > UNIX_PATH_MAX)
conf_err("UNIX path name too long");
res->addr.ai_addrlen = strlen(lin + matches[1].rm_so) + 1;
res->addr.ai_addr->sa_family = AF_UNIX;
strcpy(res->addr.ai_addr->sa_data, lin + matches[1].rm_so);
res->addr.ai_addrlen = sizeof(struct sockaddr_un);
}
has_addr = 1;
} else if (!regexec(&Port, lin, 4, matches, 0)) {
switch (res->addr.ai_family) {
case AF_INET:
memcpy(&in, res->addr.ai_addr, sizeof(in));
in.sin_port = (in_port_t) htons(atoi(lin + matches[1].rm_so));
memcpy(res->addr.ai_addr, &in, sizeof(in));
break;
case AF_INET6:
memcpy(&in6, res->addr.ai_addr, sizeof(in6));
in6.sin6_port = (in_port_t) htons(atoi(lin + matches[1].rm_so));
memcpy(res->addr.ai_addr, &in6, sizeof(in6));
break;
default:
conf_err("Port is supported only for INET/INET6 back-ends");
}
has_port = 1;
} else if (!regexec(&BackendKey, lin, 4, matches, 0)) {
lin[matches[1].rm_eo] = '\0';
if ((res->bekey = strdup(lin + matches[1].rm_so)) == NULL)
conf_err("out of memory");
} else if (!regexec(&Priority, lin, 4, matches, 0)) {
if (is_emergency)
conf_err("Priority is not supported for Emergency back-ends");
res->priority = atoi(lin + matches[1].rm_so);
} else if (!regexec(&TimeOut, lin, 4, matches, 0)) {
res->to = atoi(lin + matches[1].rm_so);
} else if (!regexec(&WSTimeOut, lin, 4, matches, 0)) {
res->ws_to = atoi(lin + matches[1].rm_so);
} else if (!regexec(&ConnTO, lin, 4, matches, 0)) {
res->conn_to = atoi(lin + matches[1].rm_so);
} else if (!regexec(&HAport, lin, 4, matches, 0)) {
if (is_emergency)
conf_err("HAport is not supported for Emergency back-ends");
res->ha_addr = res->addr;
if ((res->ha_addr.ai_addr =
(struct sockaddr *) malloc(res->addr.ai_addrlen)) == NULL)
conf_err("out of memory");
memcpy(res->ha_addr.ai_addr, res->addr.ai_addr, res->addr.ai_addrlen);
switch (res->addr.ai_family) {
case AF_INET:
memcpy(&in, res->ha_addr.ai_addr, sizeof(in));
in.sin_port = (in_port_t) htons(atoi(lin + matches[1].rm_so));
memcpy(res->ha_addr.ai_addr, &in, sizeof(in));
break;
case AF_INET6:
memcpy(&in6, res->addr.ai_addr, sizeof(in6));
in6.sin6_port = (in_port_t) htons(atoi(lin + matches[1].rm_so));
memcpy(res->addr.ai_addr, &in6, sizeof(in6));
break;
default:
conf_err("HAport is supported only for INET/INET6 back-ends");
}
} else if (!regexec(&HAportAddr, lin, 4, matches, 0)) {
if (is_emergency)
conf_err("HAportAddr is not supported for Emergency back-ends");
lin[matches[1].rm_eo] = '\0';
if (get_host(lin + matches[1].rm_so, &res->ha_addr, PF_UNSPEC)) {
/* if we can't resolve it assume this is a UNIX domain socket */
res->addr.ai_socktype = SOCK_STREAM;
res->ha_addr.ai_family = AF_UNIX;
res->ha_addr.ai_protocol = 0;
if ((res->ha_addr.ai_addr =
(struct sockaddr *) strdup(lin + matches[1].rm_so)) == NULL)
conf_err("out of memory");
res->addr.ai_addrlen = strlen(lin + matches[1].rm_so) + 1;
} else
switch (res->ha_addr.ai_family) {
case AF_INET:
memcpy(&in, res->ha_addr.ai_addr, sizeof(in));
in.sin_port = (in_port_t) htons(atoi(lin + matches[2].rm_so));
memcpy(res->ha_addr.ai_addr, &in, sizeof(in));
break;
case AF_INET6:
memcpy(&in6, res->ha_addr.ai_addr, sizeof(in6));
in6.sin6_port = (in_port_t) htons(atoi(lin + matches[2].rm_so));
memcpy(res->ha_addr.ai_addr, &in6, sizeof(in6));
break;
default:
conf_err("Unknown HA address type");
}
} else if (!regexec(&ECDHCurve, lin, 4, matches, 0)) {
lin[matches[1].rm_eo] = '\0';
if ((res->ecdhcurve_EC_nid = OBJ_sn2nid(lin + matches[1].rm_so)) == 0)
conf_err("ECDHCurve config: invalid curve name");
} else if (!regexec(&HTTPS, lin, 4, matches, 0)) {
if ((res->ctx = SSL_CTX_new(SSLv23_client_method())) == NULL)
conf_err("SSL_CTX_new failed - aborted");
SSL_CTX_set_app_data(res->ctx, res);
SSL_CTX_set_verify(res->ctx, SSL_VERIFY_NONE, NULL);
SSL_CTX_set_mode(res->ctx, SSL_MODE_AUTO_RETRY);
#ifdef SSL_MODE_SEND_FALLBACK_SCSV
SSL_CTX_set_mode(res->ctx, SSL_MODE_SEND_FALLBACK_SCSV);
#endif
SSL_CTX_set_options(res->ctx, SSL_OP_ALL);
#ifdef SSL_OP_NO_COMPRESSION
SSL_CTX_set_options(res->ctx, SSL_OP_NO_COMPRESSION);
#endif
SSL_CTX_clear_options(res->ctx, SSL_OP_ALLOW_UNSAFE_LEGACY_RENEGOTIATION);
SSL_CTX_clear_options(res->ctx, SSL_OP_LEGACY_SERVER_CONNECT);
sprintf(lin, "%d-Pound-%ld", getpid(), random());
SSL_CTX_set_session_id_context(res->ctx, (unsigned char *) lin,
strlen(lin));
SSL_CTX_set_tmp_rsa_callback(res->ctx, RSA_tmp_callback);
if (NULL == DHCustom_params)
SSL_CTX_set_tmp_dh_callback(res->ctx, DH_tmp_callback);
else
SSL_CTX_set_tmp_dh(res->ctx, DHCustom_params);
} else if (!regexec(&Cert, lin, 4, matches, 0)) {
if (res->ctx == NULL)
conf_err("BackEnd Cert can only be used after HTTPS - aborted");
lin[matches[1].rm_eo] = '\0';
if (SSL_CTX_use_certificate_chain_file(res->ctx, lin + matches[1].rm_so)
!= 1)
conf_err("SSL_CTX_use_certificate_chain_file failed - aborted");
if (SSL_CTX_use_PrivateKey_file
(res->ctx, lin + matches[1].rm_so, SSL_FILETYPE_PEM) != 1)
conf_err("SSL_CTX_use_PrivateKey_file failed - aborted");
if (SSL_CTX_check_private_key(res->ctx) != 1)
conf_err("SSL_CTX_check_private_key failed - aborted");
} else if (!regexec(&Ciphers, lin, 4, matches, 0)) {
if (res->ctx == NULL)
conf_err("BackEnd Ciphers can only be used after HTTPS - aborted");
lin[matches[1].rm_eo] = '\0';
SSL_CTX_set_cipher_list(res->ctx, lin + matches[1].rm_so);
} else if (!regexec(&DisableProto, lin, 4, matches, 0)) {
if (res->ctx == NULL)
conf_err("BackEnd Disable can only be used after HTTPS - aborted");
lin[matches[1].rm_eo] = '\0';
if (strcasecmp(lin + matches[1].rm_so, "SSLv2") == 0)
SSL_CTX_set_options(res->ctx, SSL_OP_NO_SSLv2);
else if (strcasecmp(lin + matches[1].rm_so, "SSLv3") == 0)
SSL_CTX_set_options(res->ctx, SSL_OP_NO_SSLv2 | SSL_OP_NO_SSLv3);
#ifdef SSL_OP_NO_TLSv1
else if (strcasecmp(lin + matches[1].rm_so, "TLSv1") == 0)
SSL_CTX_set_options(res->ctx,
SSL_OP_NO_SSLv2 | SSL_OP_NO_SSLv3 |
SSL_OP_NO_TLSv1);
#endif
#ifdef SSL_OP_NO_TLSv1_1
else if (strcasecmp(lin + matches[1].rm_so, "TLSv1_1") == 0)
SSL_CTX_set_options(res->ctx,
SSL_OP_NO_SSLv2 | SSL_OP_NO_SSLv3 | SSL_OP_NO_TLSv1
| SSL_OP_NO_TLSv1_1);
#endif
#ifdef SSL_OP_NO_TLSv1_2
else if (strcasecmp(lin + matches[1].rm_so, "TLSv1_2") == 0)
SSL_CTX_set_options(res->ctx,
SSL_OP_NO_SSLv2 | SSL_OP_NO_SSLv3 | SSL_OP_NO_TLSv1
| SSL_OP_NO_TLSv1_1 | SSL_OP_NO_TLSv1_2);
#endif
#ifdef SSL_OP_NO_TLSv1_3
else if (strcasecmp(lin + matches[1].rm_so, "TLSv1_3") == 0)
SSL_CTX_set_options(res->ctx, SSL_OP_NO_TLSv1_3);
#endif
} else if (!regexec(&Disabled, lin, 4, matches, 0)) {
res->disabled = atoi(lin + matches[1].rm_so);
} else if (!regexec(&End, lin, 4, matches, 0)) {
if (!has_addr)
conf_err("BackEnd missing Address - aborted");
if ((res->addr.ai_family == AF_INET || res->addr.ai_family == AF_INET6)
&& !has_port)
conf_err("BackEnd missing Port - aborted");
if (!res->bekey) {
if (res->addr.ai_family == AF_INET)
snprintf(lin, MAXBUF - 1, "4-%08x-%x",
htonl(((struct sockaddr_in *) (res->addr.ai_addr))->
sin_addr.s_addr),
htons(((struct sockaddr_in *) (res->addr.
ai_addr))->sin_port));
else if (res->addr.ai_family == AF_INET6) {
cp = (char *)
&(((struct sockaddr_in6 *) (res->addr.ai_addr))->sin6_addr);
snprintf(lin, MAXBUF - 1,
"6-%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x%02x-%x",
cp[0], cp[1], cp[2], cp[3], cp[4], cp[5], cp[6], cp[7],
cp[8], cp[9], cp[10], cp[11], cp[12], cp[13], cp[14], cp[15],
htons(((struct sockaddr_in6 *) (res->addr.
ai_addr))->sin6_port));
} else
conf_err("cannot autogenerate backendkey, please specify one");
if ((res->bekey = strdup(lin)) == NULL)
conf_err("out of memory autogenerating backendkey");
}
if (res->ctx != NULL) {
#if OPENSSL_VERSION_NUMBER >= 0x0090800fL
#ifndef OPENSSL_NO_ECDH
if (res->ecdhcurve_EC_nid != 0) {
/* This generates a EC_KEY structure with no key, but a group defined */
EC_KEY *ecdh;
if ((ecdh = EC_KEY_new_by_curve_name(res->ecdhcurve_EC_nid)) == NULL)
conf_err("Unable to generate temp ECDH key");
SSL_CTX_set_tmp_ecdh(res->ctx, ecdh);
SSL_CTX_set_options(res->ctx, SSL_OP_SINGLE_ECDH_USE);
EC_KEY_free(ecdh);
}
#if defined(SSL_CTX_set_ecdh_auto)
else
SSL_CTX_set_ecdh_auto(res->ctx, 1);
#endif
#endif
#endif
}
return res;
} else {
conf_err("unknown directive");
}
}
conf_err("BackEnd premature EOF");
return NULL;
}
/*
* parse a session
*/
static void parse_sess(SERVICE * const svc)
{
char lin[MAXBUF], *cp, *parm;
parm = NULL;
while (conf_fgets(lin, MAXBUF)) {
if (strlen(lin) > 0 && lin[strlen(lin) - 1] == '\n')
lin[strlen(lin) - 1] = '\0';
if (!regexec(&Type, lin, 4, matches, 0)) {
if (svc->sess_type != SESS_NONE)
conf_err("Multiple Session types in one Service - aborted");
lin[matches[1].rm_eo] = '\0';
cp = lin + matches[1].rm_so;
if (!strcasecmp(cp, "IP"))
svc->sess_type = SESS_IP;
else if (!strcasecmp(cp, "COOKIE"))
svc->sess_type = SESS_COOKIE;
else if (!strcasecmp(cp, "URL"))
svc->sess_type = SESS_URL;
else if (!strcasecmp(cp, "PARM"))
svc->sess_type = SESS_PARM;
else if (!strcasecmp(cp, "BASIC"))
svc->sess_type = SESS_BASIC;
else if (!strcasecmp(cp, "HEADER"))
svc->sess_type = SESS_HEADER;
else
conf_err("Unknown Session type");
} else if (!regexec(&TTL, lin, 4, matches, 0)) {
svc->sess_ttl = atoi(lin + matches[1].rm_so);
} else if (!regexec(&ID, lin, 4, matches, 0)) {
if (svc->sess_type != SESS_COOKIE && svc->sess_type != SESS_URL
&& svc->sess_type != SESS_HEADER)
conf_err("no ID permitted unless COOKIE/URL/HEADER Session - aborted");
lin[matches[1].rm_eo] = '\0';
if ((parm = strdup(lin + matches[1].rm_so)) == NULL)
conf_err("ID config: out of memory - aborted");
} else if (!regexec(&End, lin, 4, matches, 0)) {
if (svc->sess_type == SESS_NONE)
conf_err("Session type not defined - aborted");
if (svc->sess_ttl == 0)
conf_err("Session TTL not defined - aborted");
if ((svc->sess_type == SESS_COOKIE || svc->sess_type == SESS_URL
|| svc->sess_type == SESS_HEADER)
&& parm == NULL)
conf_err("Session ID not defined - aborted");
if (svc->sess_type == SESS_COOKIE) {
snprintf(lin, MAXBUF - 1, "Cookie[^:]*:.*[; \t]%s=", parm);
if (regcomp
(&svc->sess_start, lin, REG_ICASE | REG_NEWLINE | REG_EXTENDED))
conf_err("COOKIE pattern failed - aborted");
if (regcomp
(&svc->sess_pat, "([^;]*)", REG_ICASE | REG_NEWLINE | REG_EXTENDED))
conf_err("COOKIE pattern failed - aborted");
} else if (svc->sess_type == SESS_URL) {
snprintf(lin, MAXBUF - 1, "[?&]%s=", parm);
if (regcomp
(&svc->sess_start, lin, REG_ICASE | REG_NEWLINE | REG_EXTENDED))
conf_err("URL pattern failed - aborted");
if (regcomp
(&svc->sess_pat, "([^&;#]*)",
REG_ICASE | REG_NEWLINE | REG_EXTENDED))
conf_err("URL pattern failed - aborted");
} else if (svc->sess_type == SESS_PARM) {
if (regcomp
(&svc->sess_start, ";", REG_ICASE | REG_NEWLINE | REG_EXTENDED))
conf_err("PARM pattern failed - aborted");
if (regcomp
(&svc->sess_pat, "([^?]*)", REG_ICASE | REG_NEWLINE | REG_EXTENDED))
conf_err("PARM pattern failed - aborted");
} else if (svc->sess_type == SESS_BASIC) {
if (regcomp
(&svc->sess_start, "Authorization:[ \t]*Basic[ \t]*",
REG_ICASE | REG_NEWLINE | REG_EXTENDED))
conf_err("BASIC pattern failed - aborted");
if (regcomp
(&svc->sess_pat, "([^ \t]*)",
REG_ICASE | REG_NEWLINE | REG_EXTENDED))
conf_err("BASIC pattern failed - aborted");
} else if (svc->sess_type == SESS_HEADER) {
snprintf(lin, MAXBUF - 1, "%s:[ \t]*", parm);
if (regcomp
(&svc->sess_start, lin, REG_ICASE | REG_NEWLINE | REG_EXTENDED))
conf_err("HEADER pattern failed - aborted");
if (regcomp
(&svc->sess_pat, "([^ \t]*)",
REG_ICASE | REG_NEWLINE | REG_EXTENDED))
conf_err("HEADER pattern failed - aborted");
}
if (parm != NULL)
free(parm);
return;
} else {
conf_err("unknown directive");
}
}
conf_err("Session premature EOF");
return;
}
/*
* basic hashing function, based on fmv
*/
static unsigned long t_hash(const TABNODE * e)
{
unsigned long res;
char *k;
k = e->key;
res = 2166136261;
while (*k)
res = ((res ^ *k++) * 16777619) & 0xFFFFFFFF;
return res;
}
#if OPENSSL_VERSION_NUMBER >= 0x10000000L
static IMPLEMENT_LHASH_HASH_FN(t, TABNODE)
#else
static IMPLEMENT_LHASH_HASH_FN(t_hash, const TABNODE *)
#endif
static int t_cmp(const TABNODE * d1, const TABNODE * d2)
{
return strcmp(d1->key, d2->key);
}
#if OPENSSL_VERSION_NUMBER >= 0x10000000L
static IMPLEMENT_LHASH_COMP_FN(t, TABNODE)
#else
static IMPLEMENT_LHASH_COMP_FN(t_cmp, const TABNODE *)
#endif
/*
* parse an OrURLs block
*
* Forms a composite pattern of all URLs within
* of the form ((url1)|(url2)|(url3)) (and so on)
*/
static char *parse_orurls(void)
{
char lin[MAXBUF];
char *pattern;
regex_t comp;
pattern = NULL;
while (conf_fgets(lin, MAXBUF)) {
if (strlen(lin) > 0 && lin[strlen(lin) - 1] == '\n')
lin[strlen(lin) - 1] = '\0';
if (!regexec(&URL, lin, 4, matches, 0)) {
lin[matches[1].rm_eo] = '\0';
/* Verify the pattern is valid */
if (regcomp(&comp, lin + matches[1].rm_so, REG_NEWLINE | REG_EXTENDED))
conf_err("URL bad pattern - aborted");
regfree(&comp);
if (pattern == NULL) {
if ((pattern =
(char *) malloc(strlen(lin + matches[1].rm_so) + 5)) == NULL)
conf_err("OrURLs config: out of memory - aborted");
*pattern = 0;
strcat(pattern, "((");
strcat(pattern, lin + matches[1].rm_so);
strcat(pattern, "))");
} else {
if ((pattern =
(char *) realloc(pattern,
strlen(pattern) + strlen(lin + matches[1].rm_so) +
4)) == NULL)
conf_err("OrURLs config: out of memory - aborted");
pattern[strlen(pattern) - 1] = 0;
strcat(pattern, "|(");
strcat(pattern, lin + matches[1].rm_so);
strcat(pattern, "))");
}
} else if (!regexec(&End, lin, 4, matches, 0)) {
if (!pattern)
conf_err("No URL directives specified within OrURLs block");
return pattern;
} else {
conf_err("unknown directive");
}
}
conf_err("OrURLs premature EOF");
return NULL;
}
/*
* parse a service
*/
static SERVICE *parse_service(const char *svc_name)
{
char lin[MAXBUF];
char pat[MAXBUF];
char *ptr;
SERVICE *res;
BACKEND *be;
MATCHER *m;
int ign_case;
if ((res = (SERVICE *) malloc(sizeof(SERVICE))) == NULL)
conf_err("Service config: out of memory - aborted");
memset(res, 0, sizeof(SERVICE));
res->sess_type = SESS_NONE;
res->dynscale = dynscale;
res->sts = -1;
pthread_mutex_init(&res->mut, NULL);
if (svc_name)
strncpy(res->name, svc_name, KEY_SIZE);
#if OPENSSL_VERSION_NUMBER >= 0x10100000L
if ((res->sessions = lh_TABNODE_new(t_hash, t_cmp)) == NULL)
#elif OPENSSL_VERSION_NUMBER >= 0x10000000L
if ((res->sessions = LHM_lh_new(TABNODE, t)) == NULL)
#else
if ((res->sessions =
lh_new(LHASH_HASH_FN(t_hash), LHASH_COMP_FN(t_cmp))) == NULL)
#endif
conf_err("lh_new failed - aborted");
ign_case = ignore_case;
while (conf_fgets(lin, MAXBUF)) {
if (strlen(lin) > 0 && lin[strlen(lin) - 1] == '\n')
lin[strlen(lin) - 1] = '\0';
if (!regexec(&URL, lin, 4, matches, 0)) {
if (res->url) {
for (m = res->url; m->next; m = m->next);
if ((m->next = (MATCHER *) malloc(sizeof(MATCHER))) == NULL)
conf_err("URL config: out of memory - aborted");
m = m->next;
} else {
if ((res->url = (MATCHER *) malloc(sizeof(MATCHER))) == NULL)
conf_err("URL config: out of memory - aborted");
m = res->url;
}
memset(m, 0, sizeof(MATCHER));
lin[matches[1].rm_eo] = '\0';
if (regcomp
(&m->pat, lin + matches[1].rm_so,
REG_NEWLINE | REG_EXTENDED | (ign_case ? REG_ICASE : 0)))
conf_err("URL bad pattern - aborted");
} else if (!regexec(&OrURLs, lin, 4, matches, 0)) {
if (res->url) {
for (m = res->url; m->next; m = m->next);
if ((m->next = (MATCHER *) malloc(sizeof(MATCHER))) == NULL)
conf_err("URL config: out of memory - aborted");
m = m->next;
} else {
if ((res->url = (MATCHER *) malloc(sizeof(MATCHER))) == NULL)
conf_err("URL config: out of memory - aborted");
m = res->url;
}
memset(m, 0, sizeof(MATCHER));
ptr = parse_orurls();
if (regcomp
(&m->pat, ptr,
REG_NEWLINE | REG_EXTENDED | (ign_case ? REG_ICASE : 0)))
conf_err("OrURLs bad pattern - aborted");
free(ptr);
} else if (!regexec(&HeadRequire, lin, 4, matches, 0)) {
if (res->req_head) {
for (m = res->req_head; m->next; m = m->next);
if ((m->next = (MATCHER *) malloc(sizeof(MATCHER))) == NULL)
conf_err("HeadRequire config: out of memory - aborted");
m = m->next;
} else {
if ((res->req_head = (MATCHER *) malloc(sizeof(MATCHER))) == NULL)
conf_err("HeadRequire config: out of memory - aborted");
m = res->req_head;
}
memset(m, 0, sizeof(MATCHER));
lin[matches[1].rm_eo] = '\0';
if (regcomp
(&m->pat, lin + matches[1].rm_so,
REG_ICASE | REG_NEWLINE | REG_EXTENDED))
conf_err("HeadRequire bad pattern - aborted");
} else if (!regexec(&HeadDeny, lin, 4, matches, 0)) {
if (res->deny_head) {
for (m = res->deny_head; m->next; m = m->next);
if ((m->next = (MATCHER *) malloc(sizeof(MATCHER))) == NULL)
conf_err("HeadDeny config: out of memory - aborted");
m = m->next;
} else {
if ((res->deny_head = (MATCHER *) malloc(sizeof(MATCHER))) == NULL)
conf_err("HeadDeny config: out of memory - aborted");
m = res->deny_head;
}
memset(m, 0, sizeof(MATCHER));
lin[matches[1].rm_eo] = '\0';
if (regcomp
(&m->pat, lin + matches[1].rm_so,
REG_ICASE | REG_NEWLINE | REG_EXTENDED))
conf_err("HeadDeny bad pattern - aborted");
} else if (!regexec(&StrictTransportSecurity, lin, 4, matches, 0)) {
res->sts = atoi(lin + matches[1].rm_so);
} else if (!regexec(&Redirect, lin, 4, matches, 0)) {
if (res->backends) {
for (be = res->backends; be->next; be = be->next);
if ((be->next = (BACKEND *) malloc(sizeof(BACKEND))) == NULL)
conf_err("Redirect config: out of memory - aborted");
be = be->next;
} else {
if ((res->backends = (BACKEND *) malloc(sizeof(BACKEND))) == NULL)
conf_err("Redirect config: out of memory - aborted");
be = res->backends;
}
// 1 - Dynamic or not, 2 - Request Redirect #, 3 - Destination URL
memset(be, 0, sizeof(BACKEND));
be->be_type = 302;
be->redir_req = 0;
if (matches[1].rm_eo != matches[1].rm_so) {
if ((lin[matches[1].rm_so] & ~0x20) == 'D') {
be->redir_req = 2;
if (!res->url || res->url->next)
conf_err("Dynamic Redirect must be preceeded by a URL line");
} else if ((lin[matches[1].rm_so] & ~0x20) == 'A')
be->redir_req = 1;
}
if (matches[2].rm_eo != matches[2].rm_so)
be->be_type = atoi(lin + matches[2].rm_so);
be->priority = 1;
be->alive = 1;
pthread_mutex_init(&be->mut, NULL);
lin[matches[3].rm_eo] = '\0';
if ((be->url = strdup(lin + matches[3].rm_so)) == NULL)
conf_err("Redirector config: out of memory - aborted");
/* split the URL into its fields */
if (regexec(&LOCATION, be->url, 4, matches, 0))
conf_err("Redirect bad URL - aborted");
if ((matches[3].rm_eo - matches[3].rm_so) == 1)
/* the path is a single '/', so remove it */
be->url[matches[3].rm_so] = '\0';
} else if (!regexec(&BackEnd, lin, 4, matches, 0)) {
if (res->backends) {
for (be = res->backends; be->next; be = be->next);
be->next = parse_be(0);
} else
res->backends = parse_be(0);
} else if (!regexec(&Emergency, lin, 4, matches, 0)) {
res->emergency = parse_be(1);
} else if (!regexec(&BackendCookie, lin, 5, matches, 0)) {
lin[matches[1].rm_eo] = '\0';
lin[matches[2].rm_eo] = '\0';
lin[matches[3].rm_eo] = '\0';
lin[matches[4].rm_eo] = '\0';
snprintf(pat, MAXBUF - 1, "Cookie[^:]*:.*[; \t]%s=\"?([^\";]*)\"?",
lin + matches[1].rm_so);
if (matches[1].rm_so == matches[1].rm_eo)
conf_err("Backend cookie must have a name");
if ((res->becookie = strdup(lin + matches[1].rm_so)) == NULL)
conf_err("out of memory");
if (regcomp
(&res->becookie_re, pat, REG_ICASE | REG_NEWLINE | REG_EXTENDED))
conf_err("Backend Cookie pattern failed - aborted");
if (matches[2].rm_so != matches[2].rm_eo
&& (res->becdomain = strdup(lin + matches[2].rm_so)) == NULL)
conf_err("out of memory");
if (matches[3].rm_so != matches[3].rm_eo
&& (res->becpath = strdup(lin + matches[3].rm_so)) == NULL)
conf_err("out of memory");
res->becage = atoi(lin + matches[4].rm_so);
if ((lin[matches[4].rm_so] & ~0x20) == 'S')
res->becage = -1;
else
res->becage = atoi(lin + matches[4].rm_so);
} else if (!regexec(&Session, lin, 4, matches, 0)) {
parse_sess(res);
} else if (!regexec(&DynScale, lin, 4, matches, 0)) {
res->dynscale = atoi(lin + matches[1].rm_so);
} else if (!regexec(&IgnoreCase, lin, 4, matches, 0)) {
ign_case = atoi(lin + matches[1].rm_so);
} else if (!regexec(&Disabled, lin, 4, matches, 0)) {
res->disabled = atoi(lin + matches[1].rm_so);
} else if (!regexec(&End, lin, 4, matches, 0)) {
for (be = res->backends; be; be = be->next) {
if (!be->disabled)
res->tot_pri += be->priority;
res->abs_pri += be->priority;
}
return res;
} else {
conf_err("unknown directive");
}
}
conf_err("Service premature EOF");
return NULL;
}
/*
* return the file contents as a string
*/
static char *file2str(const char *fname)
{
char *res;
struct stat st;
int fin;
if (stat(fname, &st))
conf_err("can't stat Err file - aborted");
if ((fin = open(fname, O_RDONLY)) < 0)
conf_err("can't open Err file - aborted");
if ((res = malloc(st.st_size + 1)) == NULL)
conf_err("can't alloc Err file (out of memory) - aborted");
if (read(fin, res, st.st_size) != st.st_size)
conf_err("can't read Err file - aborted");
res[st.st_size] = '\0';
close(fin);
return res;
}
/*
* parse an HTTP listener
*/
static LISTENER *parse_HTTP(void)
{
char lin[MAXBUF];
LISTENER *res;
SERVICE *svc;
MATCHER *m;
int has_addr, has_port;
struct sockaddr_in in;
struct sockaddr_in6 in6;
if ((res = (LISTENER *) malloc(sizeof(LISTENER))) == NULL)
conf_err("ListenHTTP config: out of memory - aborted");
memset(res, 0, sizeof(LISTENER));
res->to = clnt_to;
res->rewr_loc = 1;
res->err414 = "Request URI is too long";
res->err500 = "An internal server error occurred. Please try again later.";
res->err501 = "This method may not be used.";
res->err503 = "The service is not available. Please try again later.";
res->errnossl = "Please use HTTPS.";
res->nossl_url = NULL;
res->nossl_redir = 0;
res->log_level = log_level;
res->ssl_forward_sni_server_name = 0;
if (regcomp(&res->verb, xhttp[0], REG_ICASE | REG_NEWLINE | REG_EXTENDED))
conf_err("xHTTP bad default pattern - aborted");
has_addr = has_port = 0;
while (conf_fgets(lin, MAXBUF)) {
if (strlen(lin) > 0 && lin[strlen(lin) - 1] == '\n')
lin[strlen(lin) - 1] = '\0';
if (!regexec(&Address, lin, 4, matches, 0)) {
lin[matches[1].rm_eo] = '\0';
if (get_host(lin + matches[1].rm_so, &res->addr, PF_UNSPEC))
conf_err("Unknown Listener address");
if (res->addr.ai_family != AF_INET && res->addr.ai_family != AF_INET6)
conf_err("Unknown Listener address family");
has_addr = 1;
} else if (!regexec(&Port, lin, 4, matches, 0)) {
switch (res->addr.ai_family) {
case AF_INET:
memcpy(&in, res->addr.ai_addr, sizeof(in));
in.sin_port = (in_port_t) htons(atoi(lin + matches[1].rm_so));
memcpy(res->addr.ai_addr, &in, sizeof(in));
break;
case AF_INET6:
memcpy(&in6, res->addr.ai_addr, sizeof(in6));
in6.sin6_port = htons(atoi(lin + matches[1].rm_so));
memcpy(res->addr.ai_addr, &in6, sizeof(in6));
break;
default:
conf_err("Unknown Listener address family");
}
has_port = 1;
} else if (!regexec(&xHTTP, lin, 4, matches, 0)) {
int n;
n = atoi(lin + matches[1].rm_so);
regfree(&res->verb);
if (regcomp(&res->verb, xhttp[n], REG_ICASE | REG_NEWLINE | REG_EXTENDED))
conf_err("xHTTP bad pattern - aborted");
} else if (!regexec(&Client, lin, 4, matches, 0)) {
res->to = atoi(lin + matches[1].rm_so);
} else if (!regexec(&CheckURL, lin, 4, matches, 0)) {
if (res->has_pat)
conf_err("CheckURL multiple pattern - aborted");
lin[matches[1].rm_eo] = '\0';
if (regcomp
(&res->url_pat, lin + matches[1].rm_so,
REG_NEWLINE | REG_EXTENDED | (ignore_case ? REG_ICASE : 0)))
conf_err("CheckURL bad pattern - aborted");
res->has_pat = 1;