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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: [email protected]
*/
#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, RootJail, Daemon, LogFacility, LogLevel, Alive, SSLEngine, Control;
static regex_t ListenHTTP, ListenHTTPS, End, Address, Port, Cert, xHTTP, Client, CheckURL;
static regex_t Err414, Err500, Err501, Err503, MaxRequest, HeadRemove, RewriteLocation, RewriteDestination;
static regex_t Service, ServiceName, URL, HeadRequire, HeadDeny, BackEnd, Emergency, Priority, HAport, HAportAddr;
static regex_t Redirect, RedirectN, TimeOut, Session, Type, TTL, ID, DynScale;
static regex_t ClientCert, AddHeader, DisableSSLv2, SSLAllowClientRenegotiation, SSLHonorCipherOrder, Ciphers;
static regex_t CAlist, VerifyList, CRLlist, NoHTTPS11, Grace, Include, ConnTO, IgnoreCase, HTTPS, HTTPSCert;
static regex_t Disabled, Threads, CNName, Anonymise;
static regmatch_t matches[5];
static char *xhttp[] = {
"^(GET|POST|HEAD) ([^ ]+) HTTP/1.[01]$",
"^(GET|POST|HEAD|PUT|DELETE) ([^ ]+) HTTP/1.[01]$",
"^(GET|POST|HEAD|PUT|DELETE|LOCK|UNLOCK|PROPFIND|PROPPATCH|SEARCH|MKCOL|MOVE|COPY|OPTIONS|TRACE|MKACTIVITY|CHECKOUT|MERGE|REPORT) ([^ ]+) HTTP/1.[01]$",
"^(GET|POST|HEAD|PUT|DELETE|LOCK|UNLOCK|PROPFIND|PROPPATCH|SEARCH|MKCOL|MOVE|COPY|OPTIONS|TRACE|MKACTIVITY|CHECKOUT|MERGE|REPORT|SUBSCRIBE|UNSUBSCRIBE|BPROPPATCH|POLL|BMOVE|BCOPY|BDELETE|BPROPFIND|NOTIFY|CONNECT) ([^ ]+) HTTP/1.[01]$",
"^(GET|POST|HEAD|PUT|DELETE|LOCK|UNLOCK|PROPFIND|PROPPATCH|SEARCH|MKCOL|MOVE|COPY|OPTIONS|TRACE|MKACTIVITY|CHECKOUT|MERGE|REPORT|SUBSCRIBE|UNSUBSCRIBE|BPROPPATCH|POLL|BMOVE|BCOPY|BDELETE|BPROPFIND|NOTIFY|CONNECT|RPC_IN_DATA|RPC_OUT_DATA) ([^ ]+) 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 be_connto = 15;
static int dynscale = 0;
static int ignore_case = 0;
#define MAX_FIN 8
static FILE *f_in[MAX_FIN];
static char *f_name[MAX_FIN];
static int n_lin[MAX_FIN];
static int cur_fin;
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;
if(!regexec(&Include, buf, 4, matches, 0)) {
buf[matches[1].rm_eo] = '\0';
if(cur_fin == (MAX_FIN - 1))
conf_err("Include nesting too deep");
cur_fin++;
if((f_name[cur_fin] = strdup(&buf[matches[1].rm_so])) == NULL)
conf_err("Include out of memory");
if((f_in[cur_fin] = fopen(&buf[matches[1].rm_so], "rt")) == NULL)
conf_err("can't open included file");
n_lin[cur_fin] = 0;
continue;
}
return buf;
}
}
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;
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_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];
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->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->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)) {
/* 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(&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(&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)) {
/* 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(&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);
SSL_CTX_set_options(res->ctx, SSL_OP_ALL);
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);
SSL_CTX_set_tmp_dh_callback(res->ctx, DH_tmp_callback);
} else if(!regexec(&HTTPSCert, 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);
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");
SSL_CTX_set_verify(res->ctx, SSL_VERIFY_NONE, NULL);
SSL_CTX_set_mode(res->ctx, SSL_MODE_AUTO_RETRY);
SSL_CTX_set_options(res->ctx, SSL_OP_ALL);
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);
SSL_CTX_set_tmp_dh_callback(res->ctx, DH_tmp_callback);
} 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");
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 a service
*/
static SERVICE *
parse_service(const char *svc_name)
{
char lin[MAXBUF];
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;
pthread_mutex_init(&res->mut, NULL);
if(svc_name)
strncpy(res->name, svc_name, KEY_SIZE);
#if 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(&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(&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;
}
memset(be, 0, sizeof(BACKEND));
be->be_type = 302;
be->priority = 1;
be->alive = 1;
pthread_mutex_init(& be->mut, NULL);
lin[matches[1].rm_eo] = '\0';
if((be->url = strdup(lin + matches[1].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((be->redir_req = 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(&RedirectN, 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;
}
memset(be, 0, sizeof(BACKEND));
be->be_type = atoi(lin + matches[1].rm_so);
be->priority = 1;
be->alive = 1;
pthread_mutex_init(& be->mut, NULL);
lin[matches[2].rm_eo] = '\0';
if((be->url = strdup(lin + matches[2].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((be->redir_req = 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(&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)
res->tot_pri += be->priority;
res->abs_pri = res->tot_pri;
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->log_level = log_level;
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))
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;
} else if(!regexec(&Err414, lin, 4, matches, 0)) {
lin[matches[1].rm_eo] = '\0';
res->err414 = file2str(lin + matches[1].rm_so);
} else if(!regexec(&Err500, lin, 4, matches, 0)) {
lin[matches[1].rm_eo] = '\0';
res->err500 = file2str(lin + matches[1].rm_so);
} else if(!regexec(&Err501, lin, 4, matches, 0)) {
lin[matches[1].rm_eo] = '\0';
res->err501 = file2str(lin + matches[1].rm_so);
} else if(!regexec(&Err503, lin, 4, matches, 0)) {
lin[matches[1].rm_eo] = '\0';
res->err503 = file2str(lin + matches[1].rm_so);
} else if(!regexec(&MaxRequest, lin, 4, matches, 0)) {
res->max_req = ATOL(lin + matches[1].rm_so);
} else if(!regexec(&HeadRemove, lin, 4, matches, 0)) {
if(res->head_off) {
for(m = res->head_off; m->next; m = m->next)
;
if((m->next = (MATCHER *)malloc(sizeof(MATCHER))) == NULL)
conf_err("HeadRemove config: out of memory - aborted");
m = m->next;
} else {
if((res->head_off = (MATCHER *)malloc(sizeof(MATCHER))) == NULL)
conf_err("HeadRemove config: out of memory - aborted");
m = res->head_off;
}
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("HeadRemove bad pattern - aborted");
} else if(!regexec(&AddHeader, lin, 4, matches, 0)) {
lin[matches[1].rm_eo] = '\0';
if(res->add_head == NULL) {
if((res->add_head = strdup(lin + matches[1].rm_so)) == NULL)
conf_err("AddHeader config: out of memory - aborted");
} else {
if((res->add_head = realloc(res->add_head, strlen(res->add_head) + strlen(lin + matches[1].rm_so) + 3))
== NULL)
conf_err("AddHeader config: out of memory - aborted");
strcat(res->add_head, "\r\n");
strcat(res->add_head, lin + matches[1].rm_so);
}
} else if(!regexec(&RewriteLocation, lin, 4, matches, 0)) {
res->rewr_loc = atoi(lin + matches[1].rm_so);
} else if(!regexec(&RewriteDestination, lin, 4, matches, 0)) {
res->rewr_dest = atoi(lin + matches[1].rm_so);
} else if(!regexec(&LogLevel, lin, 4, matches, 0)) {
res->log_level = atoi(lin + matches[1].rm_so);
} else if(!regexec(&Service, lin, 4, matches, 0)) {
if(res->services == NULL)
res->services = parse_service(NULL);
else {
for(svc = res->services; svc->next; svc = svc->next)
;
svc->next = parse_service(NULL);
}
} else if(!regexec(&ServiceName, lin, 4, matches, 0)) {
lin[matches[1].rm_eo] = '\0';
if(res->services == NULL)
res->services = parse_service(lin + matches[1].rm_so);
else {
for(svc = res->services; svc->next; svc = svc->next)
;
svc->next = parse_service(lin + matches[1].rm_so);
}
} else if(!regexec(&End, lin, 4, matches, 0)) {
if(!has_addr || !has_port)
conf_err("ListenHTTP missing Address or Port - aborted");
return res;
} else {
conf_err("unknown directive - aborted");
}
}
conf_err("ListenHTTP premature EOF");
return NULL;
}
/*
* Dummy certificate verification - always OK
*/
static int
verify_OK(int pre_ok, X509_STORE_CTX *ctx)
{
return 1;
}
#ifdef SSL_CTRL_SET_TLSEXT_SERVERNAME_CB
static int
SNI_server_name(SSL *ssl, int *dummy, POUND_CTX *ctx)
{
const char *server_name;
POUND_CTX *pc;
if((server_name = SSL_get_servername(ssl, TLSEXT_NAMETYPE_host_name)) == NULL)
return SSL_TLSEXT_ERR_NOACK;
/* logmsg(LOG_DEBUG, "Received SSL SNI Header for servername %s", servername); */
SSL_set_SSL_CTX(ssl, NULL);
for(pc = ctx; pc; pc = pc->next) {
if(fnmatch(pc->server_name, server_name, 0) == 0) {
/* logmsg(LOG_DEBUG, "Found cert for %s", servername); */
SSL_set_SSL_CTX(ssl, pc->ctx);
return SSL_TLSEXT_ERR_OK;
}
else if(pc->subjectAltNameCount > 0 && pc->subjectAltNames != NULL) {
int i;
for(i = 0; i < pc->subjectAltNameCount; i++) {
if(fnmatch(pc->subjectAltNames[i], server_name, 0) == 0) {
SSL_set_SSL_CTX(ssl, pc->ctx);
return SSL_TLSEXT_ERR_OK;
}
}
}
}
/* logmsg(LOG_DEBUG, "No match for %s, default used", server_name); */
SSL_set_SSL_CTX(ssl, ctx->ctx);
return SSL_TLSEXT_ERR_OK;
}
#endif
/*
* parse an HTTPS listener
*/
static LISTENER *
parse_HTTPS(void)
{
char lin[MAXBUF];
LISTENER *res;
SERVICE *svc;
MATCHER *m;
int has_addr, has_port, has_other;
long ssl_op_enable, ssl_op_disable;
struct hostent *host;
struct sockaddr_in in;
struct sockaddr_in6 in6;
POUND_CTX *pc;
ssl_op_enable = SSL_OP_ALL;
ssl_op_disable = SSL_OP_ALLOW_UNSAFE_LEGACY_RENEGOTIATION | SSL_OP_LEGACY_SERVER_CONNECT;
if((res = (LISTENER *)malloc(sizeof(LISTENER))) == NULL)
conf_err("ListenHTTPS 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->allow_client_reneg = 0;
res->disable_ssl_v2 = 0;
res->log_level = log_level;
if(regcomp(&res->verb, xhttp[0], REG_ICASE | REG_NEWLINE | REG_EXTENDED))
conf_err("xHTTP bad default pattern - aborted");
has_addr = has_port = has_other = 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))
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)) {
if(res->addr.ai_family == 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));
} else {
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));
}
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;
} else if(!regexec(&Err414, lin, 4, matches, 0)) {
lin[matches[1].rm_eo] = '\0';
res->err414 = file2str(lin + matches[1].rm_so);
} else if(!regexec(&Err500, lin, 4, matches, 0)) {
lin[matches[1].rm_eo] = '\0';
res->err500 = file2str(lin + matches[1].rm_so);
} else if(!regexec(&Err501, lin, 4, matches, 0)) {
lin[matches[1].rm_eo] = '\0';
res->err501 = file2str(lin + matches[1].rm_so);
} else if(!regexec(&Err503, lin, 4, matches, 0)) {
lin[matches[1].rm_eo] = '\0';
res->err503 = file2str(lin + matches[1].rm_so);
} else if(!regexec(&MaxRequest, lin, 4, matches, 0)) {
res->max_req = ATOL(lin + matches[1].rm_so);
} else if(!regexec(&HeadRemove, lin, 4, matches, 0)) {
if(res->head_off) {
for(m = res->head_off; m->next; m = m->next)
;
if((m->next = (MATCHER *)malloc(sizeof(MATCHER))) == NULL)
conf_err("HeadRemove config: out of memory - aborted");
m = m->next;
} else {
if((res->head_off = (MATCHER *)malloc(sizeof(MATCHER))) == NULL)
conf_err("HeadRemove config: out of memory - aborted");
m = res->head_off;
}
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("HeadRemove bad pattern - aborted");
} else if(!regexec(&RewriteLocation, lin, 4, matches, 0)) {
res->rewr_loc = atoi(lin + matches[1].rm_so);
} else if(!regexec(&RewriteDestination, lin, 4, matches, 0)) {
res->rewr_dest = atoi(lin + matches[1].rm_so);
} else if(!regexec(&LogLevel, lin, 4, matches, 0)) {
res->log_level = atoi(lin + matches[1].rm_so);
} else if(!regexec(&Cert, lin, 4, matches, 0)) {
#ifdef SSL_CTRL_SET_TLSEXT_SERVERNAME_CB
/* we have support for SNI */
FILE *fcert;
char server_name[MAXBUF], *cp;