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frontier_config.c
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/*
* frontier client configuration handling
*
* Author: Sinisa Veseli
*
* $Id$
*
* Copyright (c) 2009, FERMI NATIONAL ACCELERATOR LABORATORY
* All rights reserved.
*
* For details of the Fermitools (BSD) license see Fermilab-2009.txt or
* http://fermitools.fnal.gov/about/terms.html
*
*/
#include <stdio.h>
#include <stdarg.h>
#include <stdlib.h>
#include <sys/time.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <string.h>
#include <errno.h>
#include <unistd.h>
#include "pacparser.h"
#include <http/fn-htclient.h>
#include "frontier_client/frontier_config.h"
#include "frontier_client/frontier_log.h"
#include "frontier_client/frontier_error.h"
#include "frontier_client/frontier.h"
/* default configuration variables */
static int default_connect_timeout_secs=-1;
static int default_read_timeout_secs=-1;
static int default_write_timeout_secs=-1;
static int default_max_age_secs=-1;
static int default_prefer_ip_family=4;
static int default_secured=0;
static char *default_capath=0;
static char *default_force_reload=0;
static char *default_freshkey=0;
static int default_retrieve_zip_level=-1;
static char *default_logical_server=0;
static char *default_physical_servers=0;
#define ENV_BUF_SIZE 1024
void *(*frontier_mem_alloc)(size_t size);
void (*frontier_mem_free)(void *ptr);
int frontier_pacparser_init(void);
static int getNumNonBackupProxies(FrontierConfig *cfg)
{
return cfg->proxy_num-cfg->num_backupproxies;
}
FrontierConfig *frontierConfig_get(const char *server_url,const char *proxy_url,int *errorCode)
{
FrontierConfig *cfg;
int i;
char buf[ENV_BUF_SIZE];
char *env;
cfg=(FrontierConfig*)frontier_mem_alloc(sizeof(FrontierConfig));
if(!cfg)
{
*errorCode=FRONTIER_EMEM;
FRONTIER_MSG(*errorCode);
return 0;
}
bzero(cfg,sizeof(FrontierConfig));
// Set initial retrieve zip level first because it may be overridden
// by a complex server string next.
frontierConfig_setRetrieveZipLevel(cfg,frontierConfig_getDefaultRetrieveZipLevel());
// Likewise for the timeouts and forcereload
if(default_connect_timeout_secs==-1)
{
if((env=getenv(FRONTIER_ENV_CONNECTTIMEOUTSECS))==0)
{
// The default connect timeout should be quite short, to fail over to
// the next server if one of the servers is down.
default_connect_timeout_secs=5;
}
else
default_connect_timeout_secs=atoi(env);
}
frontierConfig_setConnectTimeoutSecs(cfg,default_connect_timeout_secs);
if(default_read_timeout_secs==-1)
{
if((env=getenv(FRONTIER_ENV_READTIMEOUTSECS))==0)
{
// Server should send data at least every 5 seconds; allow for double.
default_read_timeout_secs=10;
}
else
default_read_timeout_secs=atoi(env);
}
frontierConfig_setReadTimeoutSecs(cfg,default_read_timeout_secs);
if(default_write_timeout_secs==-1)
{
if((env=getenv(FRONTIER_ENV_WRITETIMEOUTSECS))==0)
{
// Writes shouldn't take very long unless there is much queued,
// which doesn't happen in the frontier client.
default_write_timeout_secs=5;
}
else
default_write_timeout_secs=atoi(env);
}
frontierConfig_setWriteTimeoutSecs(cfg,default_write_timeout_secs);
if(default_capath==0)
{
if((env=getenv("X509_CERT_DIR"))==0)
default_capath="/etc/grid-security/certificates";
else
default_capath=env;
}
frontierConfig_setCAPath(cfg,default_capath);
// No env variable for these
frontierConfig_setMaxAgeSecs(cfg,default_max_age_secs);
frontierConfig_setPreferIpFamily(cfg,default_prefer_ip_family);
frontierConfig_setSecured(cfg,default_secured);
if(default_force_reload==0)
{
if((env=getenv(FRONTIER_ENV_FORCERELOAD))==0)
default_force_reload="none";
else
default_force_reload=env;
}
frontierConfig_setForceReload(cfg,default_force_reload);
if(default_freshkey==0)
{
if((env=getenv(FRONTIER_ENV_FRESHKEY))==0)
default_freshkey="";
else
default_freshkey=env;
}
frontierConfig_setFreshkey(cfg,default_freshkey);
// Default on this is not set in environment so just set it here
frontierConfig_setClientCacheMaxResultSize(cfg,FRONTIER_DEFAULT_CLIENTCACHEMAXRESULTSIZE);
// FailoverToServer is always true unless turned off in complex server string
frontierConfig_setFailoverToServer(cfg,1);
// Add configured server and proxy.
*errorCode=frontierConfig_addServer(cfg,server_url);
if(*errorCode!=FRONTIER_OK)goto cleanup;
*errorCode=frontierConfig_addProxy(cfg,proxy_url,0);
if(*errorCode!=FRONTIER_OK)goto cleanup;
// Add additional servers/proxies from env variables.
*errorCode=frontierConfig_addServer(cfg,getenv(FRONTIER_ENV_SERVER));
if(*errorCode!=FRONTIER_OK)goto cleanup;
*errorCode=frontierConfig_addProxy(cfg,getenv(FRONTIER_ENV_PROXY),0);
if(*errorCode!=FRONTIER_OK)goto cleanup;
for(i=0;i<FRONTIER_MAX_SERVERN;i++)
{
snprintf(buf,ENV_BUF_SIZE,"%s%d",FRONTIER_ENV_SERVER,(i+1));
*errorCode=frontierConfig_addServer(cfg,getenv(buf));
if(*errorCode!=FRONTIER_OK)goto cleanup;
}
for(i=0;i<FRONTIER_MAX_PROXYN;i++)
{
snprintf(buf,ENV_BUF_SIZE,"%s%d",FRONTIER_ENV_PROXY,(i+1));
*errorCode=frontierConfig_addProxy(cfg,getenv(buf),0);
if(*errorCode!=FRONTIER_OK)goto cleanup;
}
env=getenv(FRONTIER_ENV_PROXYCONFIGS);
while(env!=0)
{
char *p=strchr(env,';');
if(p!=0)
*p='\0';
*errorCode=frontierConfig_addProxyConfig(cfg,env);
env=p;
if(p!=0)
{
*p=';';
env++;
}
if(*errorCode!=FRONTIER_OK)goto cleanup;
}
*errorCode=frontierConfig_doProxyConfig(cfg);
if(*errorCode!=FRONTIER_OK)goto cleanup;
frontier_log(FRONTIER_LOGLEVEL_DEBUG,__FILE__,__LINE__,"Total %d servers",cfg->server_num);
if (cfg->servers_balanced)
frontier_log(FRONTIER_LOGLEVEL_DEBUG,__FILE__,__LINE__,"Servers load balanced");
frontier_log(FRONTIER_LOGLEVEL_DEBUG,__FILE__,__LINE__,"Total %d proxies",cfg->proxy_num);
if (cfg->proxies_balanced)
frontier_log(FRONTIER_LOGLEVEL_DEBUG,__FILE__,__LINE__,"%d proxies load balanced",getNumNonBackupProxies(cfg));
frontier_log(FRONTIER_LOGLEVEL_DEBUG,__FILE__,__LINE__,"Retrieve zip level is %d",cfg->retrieve_zip_level);
frontier_log(FRONTIER_LOGLEVEL_DEBUG,__FILE__,__LINE__,"Connect timeoutsecs is %d",cfg->connect_timeout_secs);
frontier_log(FRONTIER_LOGLEVEL_DEBUG,__FILE__,__LINE__,"Read timeoutsecs is %d",cfg->read_timeout_secs);
frontier_log(FRONTIER_LOGLEVEL_DEBUG,__FILE__,__LINE__,"Write timeoutsecs is %d",cfg->write_timeout_secs);
if(strcmp(cfg->force_reload,"none")!=0)
frontier_log(FRONTIER_LOGLEVEL_DEBUG,__FILE__,__LINE__,"Force reload is %s",cfg->force_reload);
if(cfg->max_age_secs>=0)
frontier_log(FRONTIER_LOGLEVEL_DEBUG,__FILE__,__LINE__,"Max age secs is %d",cfg->max_age_secs);
if(*cfg->freshkey!='\0')
frontier_log(FRONTIER_LOGLEVEL_DEBUG,__FILE__,__LINE__,"Freshkey is %s",cfg->freshkey);
frontier_log(FRONTIER_LOGLEVEL_DEBUG,__FILE__,__LINE__,"Client cache max result size is %d",cfg->client_cache_max_result_size);
frontier_log(FRONTIER_LOGLEVEL_DEBUG,__FILE__,__LINE__,"Failover to server is %s",cfg->failover_to_server?"yes":"no");
return cfg;
cleanup:
frontierConfig_delete(cfg);
return 0;
}
const char *frontierConfig_getServerUrl(FrontierConfig *cfg)
{
return cfg->server[cfg->server_cur];
}
const char *frontierConfig_getProxyUrl(FrontierConfig *cfg)
{
if(cfg->proxy_cur>=cfg->proxy_num)return NULL;
return cfg->proxy[cfg->proxy_cur];
}
int frontierConfig_nextServer(FrontierConfig *cfg)
{
if(cfg->server_cur+1>=cfg->server_num)return -1;
++cfg->server_cur;
//printf("Next server %d\n",cfg->server_cur);
return 0;
}
int frontierConfig_nextProxy(FrontierConfig *cfg)
{
if(cfg->proxy_cur>=cfg->proxy_num)return -1; // One implicit which is always ""
++cfg->proxy_cur;
return 0;
}
void frontierConfig_delete(FrontierConfig *cfg)
{
int i;
if(!cfg)return;
for(i=0;i<cfg->server_num;i++)
{
frontier_mem_free(cfg->server[i]);
}
for(i=0;i<cfg->proxy_num;i++)
{
frontier_mem_free(cfg->proxy[i]);
}
for(i=0;i<cfg->proxyconfig_num;i++)
{
frontier_mem_free(cfg->proxyconfig[i]);
}
if(cfg->force_reload!=0)frontier_mem_free(cfg->force_reload);
if(cfg->freshkey!=0)frontier_mem_free(cfg->freshkey);
if(cfg->capath!=0)frontier_mem_free(cfg->capath);
frontier_mem_free(cfg);
}
void frontierConfig_setConnectTimeoutSecs(FrontierConfig *cfg,int secs)
{
cfg->connect_timeout_secs=secs;
}
int frontierConfig_getConnectTimeoutSecs(FrontierConfig *cfg)
{
return cfg->connect_timeout_secs;
}
void frontierConfig_setReadTimeoutSecs(FrontierConfig *cfg,int secs)
{
cfg->read_timeout_secs=secs;
}
int frontierConfig_getReadTimeoutSecs(FrontierConfig *cfg)
{
return cfg->read_timeout_secs;
}
void frontierConfig_setWriteTimeoutSecs(FrontierConfig *cfg,int secs)
{
cfg->write_timeout_secs=secs;
}
int frontierConfig_getWriteTimeoutSecs(FrontierConfig *cfg)
{
return cfg->write_timeout_secs;
}
void frontierConfig_setMaxAgeSecs(FrontierConfig *cfg,int secs)
{
cfg->max_age_secs=secs;
}
int frontierConfig_getMaxAgeSecs(FrontierConfig *cfg)
{
return cfg->max_age_secs;
}
void frontierConfig_setPreferIpFamily(FrontierConfig *cfg,int ipfamily)
{
if((ipfamily!=4)&&(ipfamily!=6))
ipfamily=0;
cfg->prefer_ip_family=ipfamily;
}
int frontierConfig_getPreferIpFamily(FrontierConfig *cfg)
{
return cfg->prefer_ip_family;
}
void frontierConfig_setForceReload(FrontierConfig *cfg,char *forcereload)
{
if(cfg->force_reload!=0)frontier_mem_free(cfg->force_reload);
cfg->force_reload=frontier_str_copy(forcereload);
}
const char *frontierConfig_getForceReload(FrontierConfig *cfg)
{
return cfg->force_reload;
}
void frontierConfig_setFreshkey(FrontierConfig *cfg,char *freshkey)
{
if(cfg->freshkey!=0)frontier_mem_free(cfg->freshkey);
cfg->freshkey=frontier_str_copy(freshkey);
}
const char *frontierConfig_getFreshkey(FrontierConfig *cfg)
{
return cfg->freshkey;
}
void frontierConfig_setRetrieveZipLevel(FrontierConfig *cfg,int level)
{
if(level<0)
level=0;
if(level>9)
level=9;
cfg->retrieve_zip_level=level;
}
int frontierConfig_getRetrieveZipLevel(FrontierConfig *cfg)
{
return cfg->retrieve_zip_level;
}
void frontierConfig_setDefaultRetrieveZipLevel(int level)
{
if(level<0)
level=0;
if(level>9)
level=9;
default_retrieve_zip_level=level;
}
int frontierConfig_getDefaultRetrieveZipLevel()
{
if(default_retrieve_zip_level==-1)
{
/* not yet been initialized */
char *p;
p=getenv(FRONTIER_ENV_RETRIEVEZIPLEVEL);
if((p!=0)&&(*p!='\0'))
frontierConfig_setDefaultRetrieveZipLevel(atoi(p));
}
if(default_retrieve_zip_level==-1)
default_retrieve_zip_level=5;
return default_retrieve_zip_level;
}
void frontierConfig_setDefaultLogicalServer(const char *logical_server)
{
if(logical_server!=default_logical_server)
frontier_log(FRONTIER_LOGLEVEL_DEBUG,__FILE__,__LINE__,"Setting default logical server to %s",logical_server);
if(default_logical_server!=0)
{
if((logical_server!=0)&&
(strcmp(logical_server,default_logical_server)==0))
return;
frontier_mem_free(default_logical_server);
}
if(logical_server!=0)
default_logical_server=frontier_str_copy(logical_server);
else
default_logical_server=0;
}
char *frontierConfig_getDefaultLogicalServer()
{
if(default_logical_server==0)
{
/* try the environment */
frontierConfig_setDefaultLogicalServer(getenv(FRONTIER_ENV_LOGICALSERVER));
}
return default_logical_server;
}
void frontierConfig_setDefaultPhysicalServers(const char *physical_servers)
{
if(physical_servers!=default_physical_servers)
frontier_log(FRONTIER_LOGLEVEL_DEBUG,__FILE__,__LINE__,"Setting default physical servers to %s",physical_servers);
if(default_physical_servers!=0)
{
if((physical_servers!=0)&&
(strcmp(physical_servers,default_physical_servers)==0))
return;
frontier_mem_free(default_physical_servers);
}
if(physical_servers!=0)
default_physical_servers=frontier_str_copy(physical_servers);
else
default_physical_servers=0;
}
char *frontierConfig_getDefaultPhysicalServers()
{
if(default_physical_servers==0)
{
/* try the environment */
frontierConfig_setDefaultPhysicalServers(getenv(FRONTIER_ENV_PHYSICALSERVERS));
}
return default_physical_servers;
}
void frontierConfig_setSecured(FrontierConfig *cfg,int secured)
{
cfg->secured=secured;
}
int frontierConfig_getSecured(FrontierConfig *cfg)
{
return cfg->secured;
}
void frontierConfig_setCAPath(FrontierConfig *cfg,char *capath)
{
if(cfg->capath!=0)frontier_mem_free(cfg->capath);
cfg->capath=frontier_str_copy(capath);
}
char *frontierConfig_getCAPath(FrontierConfig *cfg)
{
return cfg->capath;
}
void frontierConfig_setClientCacheMaxResultSize(FrontierConfig *cfg,int size)
{
cfg->client_cache_max_result_size=size;
}
int frontierConfig_getClientCacheMaxResultSize(FrontierConfig *cfg)
{
return cfg->client_cache_max_result_size;
}
void frontierConfig_setFailoverToServer(FrontierConfig *cfg,int notno)
{
cfg->failover_to_server=notno;
}
int frontierConfig_getFailoverToServer(FrontierConfig *cfg)
{
return cfg->failover_to_server;
}
static int frontierConfig_parseComplexServerSpec(FrontierConfig *cfg,const char* server_spec)
{
char *str=frontier_str_copy(server_spec);
char *p=str-1;
char *keyp=0,*valp=0;
int nestlevel=0;
int ret;
frontier_log(FRONTIER_LOGLEVEL_DEBUG,__FILE__,__LINE__,"Parsing complex server spec %s",server_spec);
if(str==NULL)
{
FRONTIER_MSG(FRONTIER_EMEM);
return FRONTIER_EMEM;
}
if((keyp=strstr(server_spec,"(logicalserverurl="))!=NULL)
{
// save all but this keyword as the default physical servers for
// later connections
char *nextp=strchr(keyp,')');
if(nextp!=NULL)
{
char *cp=(char *)frontier_mem_alloc(strlen(server_spec));
if(cp!=NULL)
{
strncpy(cp,server_spec,keyp-server_spec);
strcpy(cp+(keyp-server_spec),nextp+1);
frontierConfig_setDefaultPhysicalServers(cp);
frontier_mem_free(cp);
}
}
}
while(*++p)
{
switch(*p)
{
case '(':
if(nestlevel==0)
{
keyp=p+1;
valp=0;
}
nestlevel++;
break;
case '=':
if(nestlevel!=1)
continue;
*p='\0';
valp=p+1;
break;
case ')':
--nestlevel;
if(nestlevel<0)
{
frontier_setErrorMsg(__FILE__,__LINE__,"Too many close-parens in server spec");
ret=FRONTIER_ECFG;
goto cleanup;
}
if(nestlevel>0)
continue;
*p='\0';
if(valp==0)
{
if(keyp==p)
/* empty parens */
continue;
frontier_setErrorMsg(__FILE__,__LINE__,"No '=' after keyword %s",keyp);
ret=FRONTIER_ECFG;
goto cleanup;
}
ret=FRONTIER_OK;
if(strcmp(keyp,"serverurl")==0)
ret=frontierConfig_addServer(cfg,valp);
else if(strcmp(keyp,"proxyurl")==0)
ret=frontierConfig_addProxy(cfg,valp,0);
else if(strcmp(keyp,"proxyconfigurl")==0)
ret=frontierConfig_addProxyConfig(cfg,valp);
else if(strcmp(keyp,"backupproxyurl")==0)
{
/* implies failovertoserver=no */
frontierConfig_setFailoverToServer(cfg,0);
ret=frontierConfig_addProxy(cfg,valp,1);
}
else if(strcmp(keyp,"logicalserverurl")==0)
frontierConfig_setDefaultLogicalServer(valp);
else if(strcmp(keyp,"retrieve-ziplevel")==0)
frontierConfig_setRetrieveZipLevel(cfg,atoi(valp));
else if(strcmp(keyp,"connecttimeoutsecs")==0)
frontierConfig_setConnectTimeoutSecs(cfg,atoi(valp));
else if(strcmp(keyp,"readtimeoutsecs")==0)
frontierConfig_setReadTimeoutSecs(cfg,atoi(valp));
else if(strcmp(keyp,"writetimeoutsecs")==0)
frontierConfig_setWriteTimeoutSecs(cfg,atoi(valp));
else if(strcmp(keyp,"forcereload")==0)
frontierConfig_setForceReload(cfg,valp);
else if(strcmp(keyp,"maxagesecs")==0)
frontierConfig_setMaxAgeSecs(cfg,atoi(valp));
else if(strcmp(keyp,"preferipfamily")==0)
frontierConfig_setPreferIpFamily(cfg,atoi(valp));
else if(strcmp(keyp,"freshkey")==0)
frontierConfig_setFreshkey(cfg,valp);
else if(strcmp(keyp,"failovertoserver")==0)
frontierConfig_setFailoverToServer(cfg,(strcmp(valp,"no")!=0));
else if(strcmp(keyp,"loadbalance")==0)
{
if(strcmp(valp,"proxies")==0)
frontierConfig_setBalancedProxies(cfg);
else if(strcmp(valp,"servers")==0)
frontierConfig_setBalancedServers(cfg);
}
else if(strcmp(keyp,"security")==0)
frontierConfig_setSecured(cfg,(strcmp(valp,"sig")==0));
else if(strcmp(keyp,"capath")==0)
frontierConfig_setCAPath(cfg,valp);
else if(strcmp(keyp,"clientcachemaxresultsize")==0)
frontierConfig_setClientCacheMaxResultSize(cfg,atoi(valp));
else
{
/* else ignore unrecognized keys */
frontier_log(FRONTIER_LOGLEVEL_DEBUG,__FILE__,__LINE__,"Unrecognized keyword %s",keyp);
}
if(ret!=FRONTIER_OK)
goto cleanup;
break;
}
}
if(nestlevel>0)
{
frontier_setErrorMsg(__FILE__,__LINE__,"Unmatched parentheses");
ret=FRONTIER_ECFG;
goto cleanup;
}
ret=FRONTIER_OK;
cleanup:
frontier_mem_free(str);
return ret;
}
int frontierConfig_addServer(FrontierConfig *cfg,const char* server_url)
{
const char *logical_server;
if((server_url!=0)&&(strchr(server_url,'(')!=NULL))
return frontierConfig_parseComplexServerSpec(cfg,server_url);
if(!server_url)
return FRONTIER_OK;
if(!*server_url)
{
frontier_log(FRONTIER_LOGLEVEL_DEBUG,__FILE__,__LINE__,"Empty server url.");
return FRONTIER_OK;
}
logical_server=frontierConfig_getDefaultLogicalServer();
if((logical_server!=0)&&(strcmp(server_url,logical_server)==0))
{
frontier_log(FRONTIER_LOGLEVEL_DEBUG,__FILE__,__LINE__,"Matched logical server %s",server_url);
/* replace it with the physical servers */
frontierConfig_addServer(cfg,frontierConfig_getDefaultPhysicalServers());
return FRONTIER_OK;
}
/* Ready to insert new server, make sure there's room */
if(cfg->server_num>=FRONTIER_MAX_SERVERN)
{
frontier_setErrorMsg(__FILE__,__LINE__,
"Reached limit of %d frontier servers",FRONTIER_MAX_SERVERN);
return FRONTIER_ECFG;
}
/* Everything ok, insert new server. */
cfg->server[cfg->server_num]=frontier_str_copy(server_url);
frontier_log(FRONTIER_LOGLEVEL_DEBUG,__FILE__,__LINE__,
"Added server <%s>",cfg->server[cfg->server_num]);
cfg->server_num++;
return FRONTIER_OK;
}
int frontierConfig_addProxy(FrontierConfig *cfg,const char* proxy_url,int backup)
{
int n;
if(!proxy_url)
return FRONTIER_OK;
if(!*proxy_url)
{
frontier_log(FRONTIER_LOGLEVEL_DEBUG,__FILE__,__LINE__,"Empty proxy url.");
return FRONTIER_OK;
}
/* Ready to insert new proxy, make sure there's room */
if(cfg->proxy_num>=FRONTIER_MAX_PROXYN)
{
frontier_setErrorMsg(__FILE__,__LINE__,
"Reached limit of %d frontier proxies",FRONTIER_MAX_PROXYN);
return FRONTIER_ECFG;
}
if(backup)
{
/* insert backup proxy at the end of the list */
n=cfg->proxy_num;
cfg->num_backupproxies++;
}
else
{
/* move any backup proxies up one to make room for this non-backup proxy */
for(n=0;n<cfg->num_backupproxies;n++)
{
cfg->proxy[cfg->proxy_num-n]=cfg->proxy[cfg->proxy_num-n-1];
}
n=cfg->proxy_num-cfg->num_backupproxies;
}
/* Everything ok, insert new proxy. */
cfg->proxy[n]=frontier_str_copy(proxy_url);
frontier_log(FRONTIER_LOGLEVEL_DEBUG,__FILE__,__LINE__,
"Inserted proxy %d <%s>",n,cfg->proxy[n]);
cfg->proxy_num++;
return FRONTIER_OK;
}
int frontierConfig_addProxyConfig(FrontierConfig *cfg,const char* proxyconfig_url)
{
if(!proxyconfig_url)
return FRONTIER_OK;
if(!*proxyconfig_url)
{
frontier_log(FRONTIER_LOGLEVEL_DEBUG,__FILE__,__LINE__,"Empty proxy config url.");
return FRONTIER_OK;
}
/* Ready to insert new proxy config, make sure there's room */
if(cfg->proxyconfig_num>=FRONTIER_MAX_PROXYCONFIGN)
{
frontier_setErrorMsg(__FILE__,__LINE__,
"Reached limit of %d frontier proxyconfig urls",FRONTIER_MAX_PROXYCONFIGN);
return FRONTIER_ECFG;
}
/* Everything ok, insert new proxyconfig url. */
if(strcmp(proxyconfig_url,"auto")==0)
proxyconfig_url="http://wpad/wpad.dat";
cfg->proxyconfig[cfg->proxyconfig_num]=frontier_str_copy(proxyconfig_url);
frontier_log(FRONTIER_LOGLEVEL_DEBUG,__FILE__,__LINE__,
"Inserted proxy config %d <%s>",cfg->proxyconfig_num,
cfg->proxyconfig[cfg->proxyconfig_num]);
cfg->proxyconfig_num++;
return FRONTIER_OK;
}
#define MAXPACSTRINGSIZE (16*4096)
#define MAXPPERRORBUFSIZE 1024
#define PPERRORMSGPREFIX " (pacparser message: "
struct pp_errcontext {
char buf[MAXPPERRORBUFSIZE];
int len;
};
static struct pp_errcontext *pp_errorcontext;
static int fn_pp_errorvprint(const char *fmt,va_list ap)
{
struct pp_errcontext *cx=pp_errorcontext;
int start=sizeof(PPERRORMSGPREFIX)-1+cx->len;
int left=MAXPPERRORBUFSIZE-start-2;
int ret;
char *p;
ret=vsnprintf(&cx->buf[start],left,fmt,ap);
// replace newlines with blank
for(p=&cx->buf[start];*p;p++)
if(*p=='\n')
*p=' ';
if(strncmp(fmt,"WARNING: ",9)==0)
{
frontier_log(FRONTIER_LOGLEVEL_WARNING,__FILE__,__LINE__,
&cx->buf[start+9]);
return ret;
}
if(strncmp(fmt,"DEBUG: ",7)==0)
{
frontier_log(FRONTIER_LOGLEVEL_DEBUG,__FILE__,__LINE__,
&cx->buf[start+7]);
return ret;
}
if(ret>=left)
cx->len+=left-1;
else
cx->len+=ret;
return(ret);
}
static char *fn_pp_getErrorMsg()
{
struct pp_errcontext *cx=pp_errorcontext;
if(cx->len==0)
return "";
memcpy(&cx->buf[0],PPERRORMSGPREFIX,sizeof(PPERRORMSGPREFIX)-1);
cx->buf[cx->len+sizeof(PPERRORMSGPREFIX)-1]=')';
cx->buf[cx->len+sizeof(PPERRORMSGPREFIX)]='\0';
return(&cx->buf[0]);
}
int frontierConfig_doProxyConfig(FrontierConfig *cfg)
{
FrontierHttpClnt *clnt;
FrontierUrlInfo *fui=0;
int curproxyconfig,nextproxyconfig;
char *proxyconfig_url;
int n,nbytes,ret=FRONTIER_OK;
char err_last_buf[MAXPPERRORBUFSIZE];
struct pp_errcontext err_context;
char *pacstring=0;
char *ipaddr,*proxylist;
char *p,*endp,endc;
int gotdirect=0;
if(cfg->proxyconfig_num<=0)
return FRONTIER_OK;
clnt=frontierHttpClnt_create(&ret);
if(ret!=FRONTIER_OK)
return ret;
if(!clnt)
{
frontier_setErrorMsg(__FILE__,__LINE__,
"error creating http client object",0);
return FRONTIER_ECFG;
}
frontierHttpClnt_setPreferIpFamily(clnt,
frontierConfig_getPreferIpFamily(cfg));
frontierHttpClnt_setConnectTimeoutSecs(clnt,
frontierConfig_getConnectTimeoutSecs(cfg));
frontierHttpClnt_setReadTimeoutSecs(clnt,
frontierConfig_getReadTimeoutSecs(cfg));
frontierHttpClnt_setWriteTimeoutSecs(clnt,
frontierConfig_getWriteTimeoutSecs(cfg));
frontierHttpClnt_setFrontierId(clnt,FNAPI_VERSION);
for(curproxyconfig=0;curproxyconfig<cfg->proxyconfig_num;curproxyconfig++)
{
proxyconfig_url=cfg->proxyconfig[curproxyconfig];
if(strncmp(proxyconfig_url,"file://",7)==0)
{
// don't consider any proxyconfig URLs after this one
break;
}
if(strncmp(proxyconfig_url,"http://",7)!=0)
{
frontier_setErrorMsg(__FILE__,__LINE__,
"proxyconfigurl %s does not begin with 'http://', 'file://', or 'auto'",proxyconfig_url);
ret=FRONTIER_ECFG;
goto cleanup;
}
// check for something beyond a server name because otherwise
// frontierHttpClnt_addServer will give wrong message about missing servlet
if(strchr(proxyconfig_url+7,'/')==0)
{
frontier_setErrorMsg(__FILE__,__LINE__,
"config error: proxyconfigurl %s missing path on server",proxyconfig_url);
ret=FRONTIER_ECFG;
goto cleanup;
}
ret=frontierHttpClnt_addServer(clnt,proxyconfig_url);
if(ret!=FRONTIER_OK) goto cleanup;
}
pacstring=frontier_mem_alloc(MAXPACSTRINGSIZE+1);
if(!pacstring)
{
ret=FRONTIER_EMEM;
goto cleanup;
}
// Messages below have either the http client servername or the current
// proxyconfig_url. In general, warning messages should have the
// servername because that includes an IP address, and warning messages
// here are about server errors. Error messages should show the
// proxyconfig_url because that's more relevant to the user.
curproxyconfig=0;
while(1)
{
proxyconfig_url=cfg->proxyconfig[curproxyconfig];
if(strncmp(proxyconfig_url,"file://",7)==0)
{
char *fname;
int fd;
fname=strchr(proxyconfig_url+7,'/');
if(fname==NULL)
{
frontier_setErrorMsg(__FILE__,__LINE__,
"bad format for file url %s, no path", proxyconfig_url);
ret=FRONTIER_ECFG;
goto cleanup;
}
fd=open(fname,O_RDONLY);
if(fd<0)
{
frontier_setErrorMsg(__FILE__,__LINE__,
"error opening %s: %s",fname,strerror(errno));
ret=FRONTIER_ECFG;
goto cleanup;
}
nbytes=read(fd,pacstring,MAXPACSTRINGSIZE);
if(nbytes<0)
{
frontier_setErrorMsg(__FILE__,__LINE__,
"error reading %s: %s",fname,strerror(errno));
ret=FRONTIER_ECFG;
close(fd);
goto cleanup;
}
close(fd);
if(nbytes==MAXPACSTRINGSIZE)
{
frontier_setErrorMsg(__FILE__,__LINE__,
"config error: proxyconfig file %s larger than limit of %d bytes",
fname,MAXPACSTRINGSIZE);
ret=FRONTIER_ECFG;
goto cleanup;
}
frontier_log(FRONTIER_LOGLEVEL_DEBUG,__FILE__,__LINE__,
"proxyconfig file from %s is %d bytes long",fname,nbytes);
break;
}
frontier_turnErrorsIntoDebugs(1);
ret=frontierHttpClnt_open(clnt);
if(ret!=FRONTIER_OK)
{
frontier_log(FRONTIER_LOGLEVEL_WARNING,__FILE__,__LINE__,
"unable to connect to proxyconfig server %s: %s",
frontierHttpClnt_curservername(clnt), frontier_getErrorMsg());
goto trynext;
}
ret=frontierHttpClnt_get(clnt,"");
if(ret!=FRONTIER_OK)
{
frontier_log(FRONTIER_LOGLEVEL_WARNING,__FILE__,__LINE__,
"unable to get proxyconfig from %s: %s",
frontierHttpClnt_curservername(clnt), frontier_getErrorMsg());
goto trynext;
}
nbytes=0;
while((n=frontierHttpClnt_read(clnt,pacstring+nbytes,MAXPACSTRINGSIZE-nbytes))>0)
{
nbytes+=n;
if(nbytes==MAXPACSTRINGSIZE)
{
frontier_turnErrorsIntoDebugs(0);
frontier_setErrorMsg(__FILE__,__LINE__,
"config error: downloaded proxyconfig file from %s larger than limit of %d bytes",
proxyconfig_url,MAXPACSTRINGSIZE);
ret=FRONTIER_ECFG;
goto cleanup;
}
}
if(n<0)
{
frontier_log(FRONTIER_LOGLEVEL_WARNING,__FILE__,__LINE__,
"problem reading proxyconfig from %s: %s",
frontierHttpClnt_curservername(clnt), frontier_getErrorMsg());
goto trynext;
}
pacstring[nbytes]='\0';
frontier_turnErrorsIntoDebugs(0);
// successfully read the proxy autoconfig file
frontier_log(FRONTIER_LOGLEVEL_DEBUG,__FILE__,__LINE__,
"proxyconfig file from %s is %d bytes long",
frontierHttpClnt_curservername(clnt),nbytes);
break;
trynext:
strncpy(err_last_buf,frontier_getErrorMsg(),sizeof(err_last_buf)-1);
err_last_buf[sizeof(err_last_buf)-1]='\0';
frontierHttpClnt_close(clnt);
frontier_turnErrorsIntoDebugs(0);
if((nextproxyconfig=frontierHttpClnt_nextserver(clnt,1))<0)
{
curproxyconfig++;