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frontier.c
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/*
* frontier client C API implementation
*
* Author: Sergey Kosyakov
*
* $Id$
*
* 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 <stdlib.h>
#include <sys/time.h>
#include <time.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <string.h>
#include <frontier_client/frontier.h>
#include "fn-internal.h"
#include "fn-hash.h"
#include "fn-zlib.h"
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <pwd.h>
#include <fcntl.h>
#include <openssl/bio.h>
#include <openssl/pem.h>
#include <openssl/x509.h>
#include <openssl/x509v3.h>
int frontier_log_level;
char *frontier_log_file;
int frontier_log_dup = 0;
pid_t frontier_pid;
void *(*frontier_mem_alloc)(size_t size);
void (*frontier_mem_free)(void *ptr);
static int initialized=0;
static char frontier_id[FRONTIER_ID_SIZE];
static char frontier_api_version[]=FNAPI_VERSION;
static int chan_seqnum=0;
static void channel_delete(Channel *chn);
static fn_client_cache_list *client_cache_list=0;
// our own implementation of strndup
char *frontier_str_ncopy(const char *str, size_t len)
{
char *ret;
ret=frontier_mem_alloc(len+1);
if(!ret) return ret;
bcopy(str,ret,len);
ret[len]=0;
return ret;
}
// our own implementation of strdup
char *frontier_str_copy(const char *str)
{
int len=strlen(str);
char *ret;
ret=frontier_mem_alloc(len+1);
if(!ret) return ret;
bcopy(str,ret,len);
ret[len]=0;
return ret;
}
/* this returns the real owner of grid jobs */
static char *getX509Subject()
{
char *filename=getenv("X509_USER_PROXY");
BIO *biof=NULL;
X509 *x509cert=NULL;
char *subject=NULL;
if(filename==NULL)return NULL;
biof=BIO_new(BIO_s_file());
if(BIO_read_filename(biof,filename)!=0)
{
x509cert=PEM_read_bio_X509_AUX(biof,0,0,0);
if(x509cert!=NULL)
subject=X509_NAME_oneline(X509_get_subject_name(x509cert),0,0);
}
if (biof != NULL) BIO_free(biof);
if (x509cert != NULL) X509_free(x509cert);
return subject;
}
// get current time as a string
// buf should be a space at least 26 bytes long, according to man ctime_r
char *frontier_str_now(char *buf)
{
time_t now=time(NULL);
char *cnow=ctime_r(&now,buf);
// eliminate trailing newline
cnow[strlen(cnow)-1]='\0';
return cnow;
}
/* Calculate the X-Frontier-Id value. Assumes frontier_pid is set. */
static void set_frontier_id()
{
uid_t uid;
struct passwd *pwent;
char *appId;
char *x509Subject;
char *pwname, *pwgecos;
uid=getuid();
pwent=getpwuid(uid);
if(pwent==NULL)
pwname=pwgecos="pwent_failed";
else
{
pwname=pwent->pw_name;
pwgecos=pwent->pw_gecos;
}
appId=getenv("FRONTIER_ID");
if(appId==NULL)
appId=getenv("CMSSW_VERSION");
if(appId==NULL)
appId="client";
x509Subject=getX509Subject();
snprintf(frontier_id,FRONTIER_ID_SIZE,"%s %s %d %s(%d) %s",appId,frontier_api_version,frontier_pid,pwname,uid,(x509Subject!=NULL)?x509Subject:pwgecos);
if(x509Subject!=NULL)OPENSSL_free(x509Subject);
frontier_log(FRONTIER_LOGLEVEL_DEBUG,__FILE__,__LINE__,"client id: %s",frontier_id);
}
int frontier_init(void *(*f_mem_alloc)(size_t size),void (*f_mem_free)(void *ptr))
{
return(frontier_initdebug(f_mem_alloc,f_mem_free,
getenv(FRONTIER_ENV_LOG_FILE),getenv(FRONTIER_ENV_LOG_LEVEL)));
}
int frontier_initdebug(void *(*f_mem_alloc)(size_t size),void (*f_mem_free)(void *ptr),
const char *logfilename, const char *loglevel)
{
if(initialized) return FRONTIER_OK;
if(!f_mem_alloc) {f_mem_alloc=malloc; f_mem_free=free;}
if(!f_mem_free) {f_mem_alloc=malloc; f_mem_free=free;}
frontier_mem_alloc=f_mem_alloc;
frontier_mem_free=f_mem_free;
frontier_pid=getpid();
if(!loglevel)
{
frontier_log_level=FRONTIER_LOGLEVEL_NOLOG;
frontier_log_file=(char*)0;
}
else
{
if(strcasecmp(loglevel,"warning")==0 || strcasecmp(loglevel,"info")==0) frontier_log_level=FRONTIER_LOGLEVEL_WARNING;
else if(strcasecmp(loglevel,"error")==0) frontier_log_level=FRONTIER_LOGLEVEL_ERROR;
else if(strcasecmp(loglevel,"nolog")==0) frontier_log_level=FRONTIER_LOGLEVEL_NOLOG;
else frontier_log_level=FRONTIER_LOGLEVEL_DEBUG;
if(!logfilename)
{
frontier_log_file=(char*)0;
}
else
{
if(*logfilename=='+')
{
frontier_log_dup=1;
logfilename++;
}
frontier_log_file=frontier_str_copy(logfilename);
if(!frontier_log_init())
{
printf("Cannot open log file %s. Log is disabled.\n",logfilename);
frontier_log_level=FRONTIER_LOGLEVEL_NOLOG;
frontier_mem_free(frontier_log_file);
frontier_log_file=(char*)0;
}
}
}
frontier_log(FRONTIER_LOGLEVEL_DEBUG,__FILE__,__LINE__,"starting frontier client version %s",frontier_api_version);
set_frontier_id();
initialized=1;
return FRONTIER_OK;
}
/* note that caller is responsible for creating config but channel_create2
or later call to channel_delete is responsible for deleting it */
static Channel *channel_create2(FrontierConfig *config, int *ec)
{
Channel *chn;
int ret;
const char *p;
fn_client_cache_list *cache_listp;
char *servlet;
int n,s;
int longfresh=0;
chn=frontier_mem_alloc(sizeof(Channel));
if(!chn)
{
*ec=FRONTIER_EMEM;
FRONTIER_MSG(*ec);
if(config)frontierConfig_delete(config);
return (void*)0;
}
bzero(chn,sizeof(Channel));
chn->seqnum=++chan_seqnum;
chn->pid=frontier_pid;
chn->cfg=config;
if(!chn->cfg)
{
*ec=FRONTIER_EMEM;
FRONTIER_MSG(*ec);
channel_delete(chn);
return (void*)0;
}
if(!chn->cfg->server_num)
{
*ec=FRONTIER_ECFG;
frontier_setErrorMsg(__FILE__,__LINE__,"no servers configured");
channel_delete(chn);
return (void*)0;
}
chn->ht_clnt=frontierHttpClnt_create(ec);
if(!chn->ht_clnt||*ec)
{
channel_delete(chn);
return (void*)0;
}
n=0;
do
{
p=frontierConfig_getServerUrl(chn->cfg);
if(!p) break;
ret=frontierHttpClnt_addServer(chn->ht_clnt,p);
if(ret)
{
*ec=ret;
channel_delete(chn);
return (void*)0;
}
n++;
}while(frontierConfig_nextServer(chn->cfg)==0);
if(n==0)
{
*ec=FRONTIER_ECFG;
frontier_setErrorMsg(__FILE__,__LINE__,"no server configured");
channel_delete(chn);
return (void*)0;
}
if(frontierConfig_getBalancedServers(chn->cfg))
frontierHttpClnt_setBalancedServers(chn->ht_clnt);
do
{
p=frontierConfig_getProxyUrl(chn->cfg);
if(!p) break;
ret=frontierHttpClnt_addProxy(chn->ht_clnt,p);
if(ret)
{
*ec=ret;
channel_delete(chn);
return (void*)0;
}
}while(frontierConfig_nextProxy(chn->cfg)==0);
if((n=frontierConfig_getNumBalancedProxies(chn->cfg))>0)
frontierHttpClnt_setNumBalancedProxies(chn->ht_clnt,n);
chn->client_cache_maxsize=frontierConfig_getClientCacheMaxResultSize(chn->cfg);
if(chn->client_cache_maxsize>0)
{
chn->client_cache_buf=frontier_mem_alloc(chn->client_cache_maxsize);
if(!chn->client_cache_buf)
{
*ec=FRONTIER_EMEM;
FRONTIER_MSG(*ec);
channel_delete(chn);
return (void*)0;
}
// get the path component of one of the servers (they're all the same)
// which is the servlet name
servlet=frontierHttpClnt_curserverpath(chn->ht_clnt);
// locate the client cache for this servlet if it exists
for(cache_listp=client_cache_list;cache_listp!=NULL;cache_listp=cache_listp->next)
{
if(strcmp(cache_listp->servlet,servlet)==0)
{
frontier_log(FRONTIER_LOGLEVEL_DEBUG,__FILE__,__LINE__,"using existing %s client cache for responses less than %d bytes",
servlet,chn->client_cache_maxsize);
break;
}
}
if(!cache_listp)
{
// doesn't yet exist, create a client cache and its list entry.
// note that they are never deleted.
frontier_log(FRONTIER_LOGLEVEL_DEBUG,__FILE__,__LINE__,"creating %s client cache for responses less than %d bytes",
servlet,chn->client_cache_maxsize);
// leave room for the servlet name after the list entry
cache_listp=(fn_client_cache_list *)frontier_mem_alloc(sizeof(*cache_listp)+strlen(servlet)+1);
if(!cache_listp)
{
*ec=FRONTIER_EMEM;
FRONTIER_MSG(*ec);
channel_delete(chn);
frontier_mem_free(cache_listp);
return (void*)0;
}
cache_listp->table=fn_inithashtable();
if(!cache_listp->table)
{
*ec=FRONTIER_EMEM;
FRONTIER_MSG(*ec);
channel_delete(chn);
frontier_mem_free(cache_listp);
return (void*)0;
}
// tack the servlet name on the end, space was allocated above
cache_listp->servlet=((char *)cache_listp)+sizeof(*cache_listp);
strcpy(cache_listp->servlet,servlet);
cache_listp->next=client_cache_list;
client_cache_list=cache_listp;
}
chn->client_cache=cache_listp;
}
// calculate the url suffixes for short and long time-to-live, including
// &sec and &freshkey if needed
if(frontierConfig_getSecured(chn->cfg))
s=strlen("&sec=sig");
else
s=0;
p=frontierConfig_getFreshkey(chn->cfg);
n=strlen(p);
if(strncmp(p,"long",4)==0)
{
longfresh=1;
p+=4;
n-=4;
}
if(n>0)
n+=strlen("&freshkey=");
chn->ttlshort_suffix=(char *)frontier_mem_alloc(s+strlen("&ttl=short")+n+1);
chn->ttllong_suffix=(char *)frontier_mem_alloc(s+(longfresh?n:0)+1);
chn->ttlforever_suffix=(char *)frontier_mem_alloc(s+strlen("&ttl=forever")+1);
if(!chn->ttlshort_suffix||!chn->ttllong_suffix||!chn->ttlforever_suffix)
{
*ec=FRONTIER_EMEM;
FRONTIER_MSG(*ec);
channel_delete(chn);
return (void*)0;
}
*chn->ttlshort_suffix='\0';
*chn->ttllong_suffix='\0';
*chn->ttlforever_suffix='\0';
if(s>0)
{
strcat(chn->ttlshort_suffix,"&sec=sig");
strcat(chn->ttllong_suffix,"&sec=sig");
strcat(chn->ttlforever_suffix,"&sec=sig");
}
strcat(chn->ttlshort_suffix,"&ttl=short");
// long is the default ttl so don't need to add anything to it
strcat(chn->ttlforever_suffix,"&ttl=forever");
if(n>0)
{
strcat(chn->ttlshort_suffix,"&freshkey=");
strcat(chn->ttlshort_suffix,p);
if(longfresh)
{
strcat(chn->ttllong_suffix,"&freshkey=");
strcat(chn->ttllong_suffix,p);
}
// freshkey never applies to the forever time-to-live
}
frontierHttpClnt_setConnectTimeoutSecs(chn->ht_clnt,
frontierConfig_getConnectTimeoutSecs(chn->cfg));
frontierHttpClnt_setReadTimeoutSecs(chn->ht_clnt,
frontierConfig_getReadTimeoutSecs(chn->cfg));
frontierHttpClnt_setWriteTimeoutSecs(chn->ht_clnt,
frontierConfig_getWriteTimeoutSecs(chn->cfg));
chn->ttl=2; // default time-to-live is "long"
*ec=FRONTIER_OK;
return chn;
}
static Channel *channel_create(const char *srv,const char *proxy,int *ec)
{
FrontierConfig *cfg=frontierConfig_get(srv,proxy,ec);
if(!cfg)
return (void*)0;
return channel_create2(cfg,ec);
}
static void channel_delete(Channel *chn)
{
int i;
char nowbuf[26];
if(!chn) return;
frontier_log(FRONTIER_LOGLEVEL_DEBUG,__FILE__,__LINE__,"closing chan %d at %s",chn->seqnum,frontier_str_now(nowbuf));
frontierHttpClnt_delete(chn->ht_clnt);
if(chn->resp)frontierResponse_delete(chn->resp);
frontierConfig_delete(chn->cfg);
if(chn->client_cache_buf)frontier_mem_free(chn->client_cache_buf);
if(chn->ttlshort_suffix)frontier_mem_free(chn->ttlshort_suffix);
if(chn->ttllong_suffix)frontier_mem_free(chn->ttllong_suffix);
if(chn->ttlforever_suffix)frontier_mem_free(chn->ttlforever_suffix);
for(i=0;i<FRONTIER_MAX_SERVERN;i++)
if(chn->serverrsakey[i])
RSA_free((RSA *)chn->serverrsakey[i]);
frontier_mem_free(chn);
fn_gzip_cleanup();
frontier_log_close();
}
// This function is called by gcc when unloading the shared library
__attribute__ ((destructor))
static void frontier_fini()
{
EVP_cleanup();
CRYPTO_cleanup_all_ex_data();
}
FrontierChannel frontier_createChannel(const char *srv,const char *proxy,int *ec)
{
Channel *chn=channel_create(srv,proxy,ec);
return (unsigned long)chn;
}
FrontierChannel frontier_createChannel2(FrontierConfig* config, int *ec) {
Channel *chn = channel_create2(config, ec);
return (unsigned long)chn;
}
void frontier_closeChannel(FrontierChannel fchn)
{
channel_delete((Channel*)fchn);
}
// 1: short time
// 2: long time
// 3: forever
void frontier_setTimeToLive(FrontierChannel u_channel,int ttl)
{
Channel *chn=(Channel*)u_channel;
if((ttl<1)||(ttl>3))
frontier_log(FRONTIER_LOGLEVEL_DEBUG,__FILE__,__LINE__,"ignoring bad value of TimeToLive %d on chan %d",ttl,chn->seqnum);
else if(chn->ttl!=ttl)
{
frontier_log(FRONTIER_LOGLEVEL_DEBUG,__FILE__,__LINE__,"changing chan %d ttl flag to %d",chn->seqnum,ttl);
chn->ttl=ttl;
}
}
void frontier_setReload(FrontierChannel u_channel,int reload)
{
// deprecated interface, leave for backward compatibility
// 0=long, !0=short
frontier_setTimeToLive(u_channel,reload?1:2);
}
static int write_data(FrontierResponse *resp,void *buf,int len)
{
int ret;
ret=FrontierResponse_append(resp,buf,len);
return ret;
}
static int prepare_channel(Channel *chn,int curserver,const char *params1,const char *params2)
{
int ec;
if(chn->resp) frontierResponse_delete(chn->resp);
chn->resp=frontierResponse_create(&ec,curserver<0?0:chn->serverrsakey[curserver],params1,params2);
chn->resp->seqnum=++chn->response_seqnum;
if(!chn->resp) return ec;
return FRONTIER_OK;
}
static char *vcb_curservername;
static int cert_verify_callback(int ok,X509_STORE_CTX *ctx)
{
if (!ok)
frontier_setErrorMsg(__FILE__,__LINE__, "error verifying server %s cert: %s",vcb_curservername,X509_verify_cert_error_string(ctx->error));
return ok;
}
static int get_cert(Channel *chn,const char *uri,int curserver)
{
int ret;
int refresh;
const char *force_reload;
char *certuri=0;
char *p,*cert=0;
int n,len;
char *servername,*commonname=0;
BIO *bio=0;
X509 *x509cert=0;
X509_STORE *x509store=0;
X509_STORE_CTX *x509storectx=0;
X509_VERIFY_PARAM *x509verifyparam=0;
X509_LOOKUP *x509lookup=0;
char *x509subject=0;
GENERAL_NAMES *subjectAltNames=0;
EVP_PKEY *pubkey=0;
RSA *rsakey=0;
ret=prepare_channel(chn,curserver,0,0);
if(ret) return ret;
frontierHttpClnt_setPreferIpFamily(chn->ht_clnt,
frontierConfig_getPreferIpFamily(chn->cfg));
force_reload=frontierConfig_getForceReload(chn->cfg);
refresh=0;
if((strstr(force_reload,"long")!=0)||(strstr(force_reload,"forever")!=0))
{
refresh=1;
if(strncmp(force_reload,"soft",4)!=0)
refresh=2;
}
frontierHttpClnt_setCacheRefreshFlag(chn->ht_clnt,refresh);
frontierHttpClnt_setUrlSuffix(chn->ht_clnt,"");
frontierHttpClnt_setFrontierId(chn->ht_clnt,frontier_id);
ret=frontierHttpClnt_open(chn->ht_clnt);
if(ret) goto end;
p=strstr(uri,"/type=");
if(p==0)
{
frontier_setErrorMsg(__FILE__,__LINE__,"cannot find /type= in URI: %s",uri);
return FRONTIER_EIARG;
}
len=p-uri;
#define CERTURISTR "/type=cert_request:1&encoding=pem"
certuri=frontier_mem_alloc(len+sizeof(CERTURISTR));
if(!certuri) {ret=FRONTIER_EMEM;FRONTIER_MSG(ret);goto end;}
strncpy(certuri,uri,len);
strcpy(certuri+len,CERTURISTR);
#undef CERTURISTR
ret=frontierHttpClnt_get(chn->ht_clnt,certuri);
if(ret) goto end;
servername=frontierHttpClnt_curservername(chn->ht_clnt);
if((p=strchr(servername,'['))!=0)
*p='\0';
len=frontierHttpClnt_getContentLength(chn->ht_clnt);
if(len<=0)
{
frontier_setErrorMsg(__FILE__,__LINE__,"no content length from server cert request to server %s",servername);
ret=FRONTIER_ESERVER;
goto end;
}
cert=frontier_mem_alloc(len+1);
if(!cert) {ret=FRONTIER_EMEM;FRONTIER_MSG(ret);goto end;}
n=0;
while(n<len)
{
ret=frontierHttpClnt_read(chn->ht_clnt,cert+n,len-n);
if(ret<=0)
{
if(ret==0)
{
frontier_setErrorMsg(__FILE__,__LINE__,"server cert from %s too short: expected %d bytes, got %d",servername,len,n);
ret=FRONTIER_ESERVER;
}
goto end;
}
n+=ret;
}
cert[len]='\0';
if(strncmp(cert,"-----BEGIN ",11)!=0)
{
frontier_setErrorMsg(__FILE__,__LINE__,"server cert from %s bad response",servername);
ret=FRONTIER_ESERVER;
goto end;
}
bio=BIO_new_mem_buf(cert,len);
if(!bio) {ret=FRONTIER_EMEM;FRONTIER_MSG(ret);goto end;}
x509cert=PEM_read_bio_X509(bio,0,0,0);
if(!x509cert)
{
frontier_setErrorMsg(__FILE__,__LINE__,"error reading x509 certificate from server %s",servername);
ret=FRONTIER_ESERVER;
goto end;
}
OpenSSL_add_all_algorithms();
x509store=X509_STORE_new();
x509verifyparam=X509_VERIFY_PARAM_new();
X509_VERIFY_PARAM_set_flags(x509verifyparam,X509_V_FLAG_CRL_CHECK|X509_V_FLAG_CRL_CHECK_ALL);
X509_STORE_set1_param(x509store,x509verifyparam);
X509_STORE_set_verify_cb_func(x509store,cert_verify_callback);
x509lookup=X509_STORE_add_lookup(x509store,X509_LOOKUP_hash_dir());
if(!x509lookup) {ret=FRONTIER_EMEM;FRONTIER_MSG(ret);goto end;}
if(!X509_LOOKUP_add_dir(x509lookup,frontierConfig_getCAPath(chn->cfg),X509_FILETYPE_PEM))
{
frontier_setErrorMsg(__FILE__,__LINE__,"error adding %s as x509 lookup dir",frontierConfig_getCAPath(chn->cfg));
ret=FRONTIER_ECFG;
goto end;
}
x509storectx=X509_STORE_CTX_new();
if(!x509storectx) {ret=FRONTIER_EMEM;FRONTIER_MSG(ret);goto end;}
if(!X509_STORE_CTX_init(x509storectx,x509store,x509cert,0)) {ret=FRONTIER_EMEM;FRONTIER_MSG(ret);goto end;}
x509subject=X509_NAME_oneline(X509_get_subject_name(x509cert),0,0);
if(!x509subject) {ret=FRONTIER_EMEM;FRONTIER_MSG(ret);goto end;}
frontier_log(FRONTIER_LOGLEVEL_DEBUG,__FILE__,__LINE__,"verifying server certificate %s",x509subject);
// Have to put server name in a static variable for the error, unfortunately,
// because there's no way to pass a value to the callback.
vcb_curservername=servername;
if(!X509_verify_cert(x509storectx))
{
// error message is set inside callback
ret=FRONTIER_ESERVER;
goto end;
}
if((p=strstr(x509subject,"/CN="))!=0)
{
commonname=p+4;
if((p=strchr(commonname,'/'))!=0)
*p='\0';
}
if((commonname!=0)&&(strcmp(commonname,servername)==0))
frontier_log(FRONTIER_LOGLEVEL_DEBUG,__FILE__,__LINE__,"servername %s matched CN",servername);
else
{
int numalts,i;
subjectAltNames=(GENERAL_NAMES *)X509_get_ext_d2i(x509cert,NID_subject_alt_name,0,0);
if(!subjectAltNames)
{
frontier_setErrorMsg(__FILE__,__LINE__,"server %s name does not match cert common name %s",servername,commonname?commonname:"none");
ret=FRONTIER_ESERVER;
goto end;
}
numalts=sk_GENERAL_NAME_num(subjectAltNames);
for(i=0;i<numalts;i++)
{
GENERAL_NAME *altname=sk_GENERAL_NAME_value(subjectAltNames,i);
if(altname->type==GEN_DNS)
{
unsigned char *dns;
ASN1_STRING_to_UTF8(&dns,altname->d.dNSName);
if(strcmp((char *)dns,servername)==0)
{
OPENSSL_free(dns);
break;
}
frontier_log(FRONTIER_LOGLEVEL_DEBUG,__FILE__,__LINE__,"cert alternative DNS name %s didn't match server name %s",dns,servername);
OPENSSL_free(dns);
}
}
if(i==numalts)
{
frontier_setErrorMsg(__FILE__,__LINE__,"server %s name does not match cert common name %s nor any of the alternative DNS subject names",servername,commonname?commonname:"none");
ret=FRONTIER_ESERVER;
goto end;
}
frontier_log(FRONTIER_LOGLEVEL_DEBUG,__FILE__,__LINE__,"server name %s matched alternative DNS subject name",servername);
}
pubkey=X509_get_pubkey(x509cert);
if(!pubkey)
{
frontier_setErrorMsg(__FILE__,__LINE__,"error extracting public key from server %s cert",servername);
ret=FRONTIER_ESERVER;
goto end;
}
rsakey=EVP_PKEY_get1_RSA(pubkey);
if(!rsakey)
{
frontier_setErrorMsg(__FILE__,__LINE__,"error extracting rsa key from server %s cert",servername);
ret=FRONTIER_ESERVER;
goto end;
}
ret=FRONTIER_OK;
chn->serverrsakey[curserver]=rsakey;
end:
frontierHttpClnt_close(chn->ht_clnt);
if(certuri)frontier_mem_free(certuri);
if(x509store)X509_STORE_free(x509store);
// X509_STORE_free does X509_LOOKUP_free
if(x509storectx)X509_STORE_CTX_free(x509storectx);
if(x509verifyparam)X509_VERIFY_PARAM_free(x509verifyparam);
if(pubkey)EVP_PKEY_free(pubkey);
if(x509cert)X509_free(x509cert);
if(bio)BIO_free(bio);
if(cert)frontier_mem_free(cert);
if(x509subject)OPENSSL_free(x509subject);
if(subjectAltNames)sk_GENERAL_NAME_pop_free(subjectAltNames,GENERAL_NAME_free);
return ret;
}
static int get_data(Channel *chn,const char *uri,const char *body,int curserver)
{
int ret=FRONTIER_OK;
char buf[8192];
const char *force_reload;
int force_ttl;
char *url_suffix;
char *uri_copy,*data_copy;
int uri_len;
int refresh,maxage;
int client_cache_bufsize;
fn_hashval *hashval;
char statbuf[128];
if(!chn)
{
frontier_setErrorMsg(__FILE__,__LINE__,"wrong channel");
return FRONTIER_EIARG;
}
refresh=chn->refresh;
maxage=frontierConfig_getMaxAgeSecs(chn->cfg);
if(refresh)
{
// refresh requested by server in last response
if(refresh==1)
{
// soft refresh; chn->max_age contains the max cache age to request
if((maxage<0)||(maxage>chn->max_age))
maxage=chn->max_age;
refresh=0; // because httpclient treats a refresh==1 as maxage==0
}
// else refresh==2, fall through to do a hard refresh
}
else
{
// refresh not requested by server, see if need to force a refresh
force_reload=frontierConfig_getForceReload(chn->cfg);
if(strcmp(force_reload,"none")!=0)
{
force_ttl=0;
if(strstr(force_reload,"short")!=0)
force_ttl=1;
else if(strstr(force_reload,"long")!=0)
force_ttl=2;
else if(strstr(force_reload,"forever")!=0)
force_ttl=3;
if(force_ttl&&(chn->ttl<=force_ttl))
{
refresh=1;
if(strncmp(force_reload,"soft",4)!=0)
{
// hard refresh if force_reload doesn't start with "soft"
refresh=2;
}
}
}
}
frontierHttpClnt_setCacheRefreshFlag(chn->ht_clnt,refresh);
frontierHttpClnt_setCacheMaxAgeSecs(chn->ht_clnt,maxage);
frontierHttpClnt_setPreferIpFamily(chn->ht_clnt,
frontierConfig_getPreferIpFamily(chn->cfg));
if(chn->ttl==1)
url_suffix=chn->ttlshort_suffix;
else if(chn->ttl==3)
url_suffix=chn->ttlforever_suffix;
else
url_suffix=chn->ttllong_suffix;
frontierHttpClnt_setUrlSuffix(chn->ht_clnt,url_suffix);
frontierHttpClnt_setFrontierId(chn->ht_clnt,frontier_id);
ret=prepare_channel(chn,curserver,uri,url_suffix);
if(ret) return ret;
ret=frontierHttpClnt_open(chn->ht_clnt);
if(ret) goto end;
if(body) ret=frontierHttpClnt_post(chn->ht_clnt,uri,body);
else ret=frontierHttpClnt_get(chn->ht_clnt,uri);
if(ret) goto end;
if(body)client_cache_bufsize=-1;
else client_cache_bufsize=0;
while(1)
{
ret=frontierHttpClnt_read(chn->ht_clnt,buf,8192);
if(ret<0) goto end;
if(ret==0) break;
#if 0
frontier_log(FRONTIER_LOGLEVEL_DEBUG,__FILE__,__LINE__,"read %d bytes from server",ret);
#endif
if((chn->client_cache_maxsize>0)&&(client_cache_bufsize>=0))
{
if(ret+client_cache_bufsize<=chn->client_cache_maxsize)
{
bcopy(buf,chn->client_cache_buf+client_cache_bufsize,ret);
client_cache_bufsize+=ret;
}
else
{
//too big, don't append any more chunks that might fit
client_cache_bufsize=-1;
frontier_log(FRONTIER_LOGLEVEL_DEBUG,__FILE__,__LINE__,"result too large for client cache");
}
}
ret=write_data(chn->resp,buf,ret);
if(ret!=FRONTIER_OK) goto end;
}
if(client_cache_bufsize>0)
{
uri_len=strlen(uri)+1;
if((uri_copy=frontier_mem_alloc(uri_len))==0)
{
ret=FRONTIER_EMEM;
FRONTIER_MSG(ret);
}
else if((data_copy=frontier_mem_alloc(client_cache_bufsize))==0)
{
ret=FRONTIER_EMEM;
FRONTIER_MSG(ret);
frontier_mem_free(uri_copy);
}
else if((hashval=(fn_hashval *)frontier_mem_alloc(sizeof(fn_hashval)))==0)
{
ret=FRONTIER_EMEM;
FRONTIER_MSG(ret);
frontier_mem_free(uri_copy);
frontier_mem_free(data_copy);
}
else
{
bcopy(uri,uri_copy,uri_len);
bcopy(chn->client_cache_buf,data_copy,client_cache_bufsize);
hashval->len=client_cache_bufsize;
hashval->data=data_copy;
if(!fn_hashtable_insert(chn->client_cache->table,uri_copy,hashval))
{
frontier_setErrorMsg(__FILE__,__LINE__,"error inserting result in client cache");
ret=FRONTIER_EMEM;
frontier_mem_free(uri_copy);
frontier_mem_free(data_copy);
frontier_mem_free(hashval);
}
else if(frontier_log_level==FRONTIER_LOGLEVEL_DEBUG)
{
frontier_log(FRONTIER_LOGLEVEL_DEBUG,__FILE__,__LINE__,"inserted %d byte result in %s client cache with %d byte key",
client_cache_bufsize,chn->client_cache->servlet,uri_len);
fn_hashtable_stats(chn->client_cache->table,statbuf,sizeof(statbuf));
frontier_log(FRONTIER_LOGLEVEL_DEBUG,__FILE__,__LINE__,"%s client cache hash stats: %s",chn->client_cache->servlet,statbuf);
}
}
}
end:
frontierHttpClnt_close(chn->ht_clnt);
return ret;
}
#define ERR_LAST_BUF_SIZE 1024
int frontier_getRawData(FrontierChannel u_channel,const char *uri)
{
int ret;
ret=frontier_postRawData(u_channel,uri,NULL);
return ret;
}
int frontier_postRawData(FrontierChannel u_channel,const char *uri,const char *body)
{
Channel *chn=(Channel*)u_channel;
int ret=FRONTIER_OK;
fn_hashval *hashval;
FrontierHttpClnt *clnt;
char err_last_buf[ERR_LAST_BUF_SIZE];
int curproxy,curserver;
int have_reset_serverlist=0;
pid_t pid;
char nowbuf[26];
if((pid=getpid())!=frontier_pid)
{
pid_t oldpid;
// process must have forked
frontier_log(FRONTIER_LOGLEVEL_DEBUG,__FILE__,__LINE__,"process id changed to %d",(int)pid);
oldpid=frontier_pid;
frontier_pid=pid;
// switch to new log if it includes %P in the name
frontier_log_close();
frontier_log(FRONTIER_LOGLEVEL_DEBUG,__FILE__,__LINE__,"process id changed from %d",(int)oldpid);
// re-set id to use new pid
set_frontier_id();
}
if(pid!=chn->pid)
{
frontier_log(FRONTIER_LOGLEVEL_DEBUG,__FILE__,__LINE__,"dropping any chan %d persisted connection because process id changed",chn->seqnum);
chn->pid=pid;
// drop the socket because it is shared between parent and child
frontierHttpClnt_drop(chn->ht_clnt);
}
if(!chn)
{
frontier_setErrorMsg(__FILE__,__LINE__,"wrong channel");
return FRONTIER_EIARG;
}
if(!body&&(chn->client_cache_maxsize>0))
{
if((hashval=fn_hashtable_search(chn->client_cache->table,(char *)uri))!=0)
{
frontier_log(FRONTIER_LOGLEVEL_DEBUG,__FILE__,__LINE__,"HIT in %s client cache, skipping contacting server",chn->client_cache->servlet);
ret=prepare_channel(chn,-1,0,0);
if(ret) return ret;
return write_data(chn->resp,hashval->data,hashval->len);
}
}
clnt=chn->ht_clnt;
frontierHttpClnt_resetwhenold(clnt);
curproxy=frontierHttpClnt_shuffleproxygroup(clnt);
curserver=frontierHttpClnt_shuffleservergroup(clnt);
chn->refresh=0;
bzero(err_last_buf,ERR_LAST_BUF_SIZE);
while(1)
{
// because this is a retry loop, transfer errors aren't necessarily errors
frontier_turnErrorsIntoDebugs(1);
ret=FRONTIER_OK;
if(frontierConfig_getSecured(chn->cfg)&&(chn->serverrsakey[curserver]==0))
{
// don't yet have the server certificate, get that first
frontier_log(FRONTIER_LOGLEVEL_DEBUG,__FILE__,__LINE__,"getting certificate on chan %d at %s",chn->seqnum,frontier_str_now(nowbuf));
ret=get_cert(chn,uri,curserver);
}
if(ret==FRONTIER_OK)
{
frontier_log(FRONTIER_LOGLEVEL_DEBUG,__FILE__,__LINE__,"querying on chan %d at %s",chn->seqnum,frontier_str_now(nowbuf));
ret=get_data(chn,uri,body,curserver);
if(ret==FRONTIER_OK)
{
ret=frontierResponse_finalize(chn->resp);
frontier_turnErrorsIntoDebugs(0);
frontier_log(FRONTIER_LOGLEVEL_DEBUG,__FILE__,__LINE__,"chan %d response %d finished at %s",chn->seqnum,chn->resp->seqnum,frontier_str_now(nowbuf));
}