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5a9262a333

Stefan Eissing
Stefan Eissing
2024-08-03
SUCCESS Duration: 92s

Subject

url: dns_entry related improvements

Binary

Download Binary (840 KB)

Architecture & Compiler Flags

Architecture: x86_64-linux-gnu Compiler: gcc (Ubuntu 11.4.0-1ubuntu1~22.04.3) 11.4.0

—

Build Log

$ git checkout -f 5a9262a333900cb175f4067b10700b3e264552a5
Previous HEAD position was 0472afe5f9 vtls: init ssl peer only once
HEAD is now at 5a9262a333 url: dns_entry related improvements

$ git clean -fdx
Removing Makefile
Removing Makefile.in
Removing aclocal.m4
Removing autom4te.cache/
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Removing config.log
Removing config.status
Removing config.sub
Removing configure
Removing curl-config
Removing depcomp
Removing docs/Makefile
Removing docs/Makefile.in
Removing docs/cmdline-opts/Makefile
Removing docs/cmdline-opts/Makefile.in
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Removing lib/curl_config.h
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Removing lib/curl_multibyte.o
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$ autoreconf -fi
libtoolize: putting auxiliary files in '.'.
libtoolize: copying file './ltmain.sh'
libtoolize: putting macros in AC_CONFIG_MACRO_DIRS, 'm4'.
libtoolize: copying file 'm4/libtool.m4'
libtoolize: copying file 'm4/ltoptions.m4'
libtoolize: copying file 'm4/ltsugar.m4'
libtoolize: copying file 'm4/ltversion.m4'
libtoolize: copying file 'm4/lt~obsolete.m4'
libtoolize: Remember to add 'LT_INIT' to configure.ac.
configure.ac:125: installing './compile'
configure.ac:437: installing './config.guess'
configure.ac:437: installing './config.sub'
configure.ac:125: installing './install-sh'
configure.ac:131: installing './missing'
docs/examples/Makefile.am: installing './depcomp'

$ bash -c find . -name config.guess -exec cp /usr/share/misc/config.guess {} \;

$ bash -c find . -name config.sub -exec cp /usr/share/misc/config.sub {} \;

$ chmod +x configure

$ ./configure --disable-shared --without-ssl --disable-docs
checking whether to enable maintainer-specific portions of Makefiles... no
checking whether make supports nested variables... yes
checking whether to enable debug build options... no
checking whether to enable compiler optimizer... (assumed) yes
checking whether to enable strict compiler warnings... no
checking whether to enable compiler warnings as errors... no
checking whether to enable curl debug memory tracking... no
checking whether to enable hiding of library internal symbols... yes
checking whether to enable c-ares for DNS lookups... no
checking whether to disable dependency on -lrt... (assumed no)
checking whether to enable HTTPSRR support... no
checking whether to enable ECH support... no
checking for path separator... :
checking for sed... /usr/bin/sed
checking for grep... /usr/bin/grep
checking that grep -E works... yes
checking for ar... /usr/bin/ar
checking for a BSD-compatible install... /usr/bin/install -c
checking for gcc... ccache gcc
checking whether the C compiler works... yes
checking for C compiler default output file name... a.out
checking for suffix of executables... 
checking whether we are cross compiling... no
checking for suffix of object files... o
checking whether the compiler supports GNU C... yes
checking whether ccache gcc accepts -g... yes
checking for ccache gcc option to enable C11 features... none needed
checking whether ccache gcc understands -c and -o together... yes
checking how to run the C preprocessor... ccache gcc -E
checking for stdio.h... yes
checking for stdlib.h... yes
checking for string.h... yes
checking for inttypes.h... yes
checking for stdint.h... yes
checking for strings.h... yes
checking for sys/stat.h... yes
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checking if compiler accepts some basic options... yes
configure: compiler options added: -Werror-implicit-function-declaration 
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configure: found both libz and libz.h header
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checking whether to use POSIX threads for threaded resolver... auto
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configure: disables HSTS due to lack of SSL
checking whether to support WebSockets... no
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checking if this build supports HTTPS-proxy... no
checking that generated files are newer than configure... done
configure: creating ./config.status
config.status: creating Makefile
config.status: creating docs/Makefile
config.status: creating docs/examples/Makefile
config.status: creating docs/libcurl/Makefile
config.status: creating docs/libcurl/opts/Makefile
config.status: creating docs/cmdline-opts/Makefile
config.status: creating include/Makefile
config.status: creating include/curl/Makefile
config.status: creating src/Makefile
config.status: creating lib/Makefile
config.status: creating scripts/Makefile
config.status: creating lib/libcurl.vers
config.status: creating tests/Makefile
config.status: creating tests/config
config.status: creating tests/certs/Makefile
config.status: creating tests/certs/scripts/Makefile
config.status: creating tests/data/Makefile
config.status: creating tests/server/Makefile
config.status: creating tests/libtest/Makefile
config.status: creating tests/unit/Makefile
config.status: creating tests/http/config.ini
config.status: creating tests/http/Makefile
config.status: creating tests/http/clients/Makefile
config.status: creating packages/Makefile
config.status: creating packages/vms/Makefile
config.status: creating curl-config
config.status: creating libcurl.pc
config.status: creating lib/curl_config.h
config.status: executing depfiles commands
config.status: executing libtool commands
configure: Configured to build curl/libcurl:

  Host setup:       x86_64-pc-linux-gnu
  Install prefix:   /usr/local
  Compiler:         ccache gcc
   CFLAGS:          -Werror-implicit-function-declaration -O2 -Wno-system-headers
   CFLAGS extras:   
   CPPFLAGS:        
   LDFLAGS:         
   LIBS:            -lpsl -lz

  curl version:     8.10.0-DEV
  SSL:              no      (--with-{openssl,gnutls,mbedtls,wolfssl,schannel,secure-transport,amissl,bearssl,rustls} )
  SSH:              no      (--with-{libssh,libssh2})
  zlib:             enabled
  brotli:           no      (--with-brotli)
  zstd:             no      (--with-zstd)
  GSS-API:          no      (--with-gssapi)
  GSASL:            no      (libgsasl not found)
  TLS-SRP:          no      (--enable-tls-srp)
  resolver:         POSIX threaded
  IPv6:             enabled
  Unix sockets:     enabled
  IDN:              no      (--with-{libidn2,winidn})
  Build docs:       no
  Build libcurl:    Shared=no, Static=yes
  Built-in manual:  no      (--enable-manual)
  --libcurl option: enabled (--disable-libcurl-option)
  Verbose errors:   enabled (--disable-verbose)
  Code coverage:    disabled
  SSPI:             no      (--enable-sspi)
  ca cert bundle:   no
  ca cert path:     
  ca fallback:      
  LDAP:             no      (--enable-ldap / --with-ldap-lib / --with-lber-lib)
  LDAPS:            no      (--enable-ldaps)
  RTSP:             enabled
  RTMP:             no      (--with-librtmp)
  PSL:              enabled
  Alt-svc:          enabled (--disable-alt-svc)
  Headers API:      enabled (--disable-headers-api)
  HSTS:             no      (--enable-hsts)
  HTTP1:            enabled (internal)
  HTTP2:            no      (--with-nghttp2)
  HTTP3:            no      (--with-ngtcp2 --with-nghttp3, --with-quiche, --with-openssl-quic, --with-msh3)
  ECH:              no      (--enable-ech)
  WebSockets:       no      (--enable-websockets)
  Protocols:        dict file ftp gopher http imap ipfs ipns mqtt pop3 rtsp smtp telnet tftp
  Features:         alt-svc AsynchDNS IPv6 Largefile libz PSL threadsafe UnixSockets

configure: WARNING: Cannot find libraries for LDAP support: LDAP disabled
configure: WARNING: libgsasl was not found
configure: WARNING: Cannot find libraries for IDN support: IDN disabled

$ make -j3
Making all in lib
make[1]: Entering directory '/root/asi_db/builds/curl/_worktrees/w0/lib'
make  all-am
make[2]: Entering directory '/root/asi_db/builds/curl/_worktrees/w0/lib'
  CC       libcurl_la-altsvc.lo
  CC       libcurl_la-amigaos.lo
  CC       libcurl_la-asyn-ares.lo
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  CC       vssh/libcurl_la-libssh.lo
  CC       vssh/libcurl_la-libssh2.lo
  CC       vssh/libcurl_la-wolfssh.lo
  CCLD     libcurl.la
make[2]: Leaving directory '/root/asi_db/builds/curl/_worktrees/w0/lib'
make[1]: Leaving directory '/root/asi_db/builds/curl/_worktrees/w0/lib'
Making all in docs
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Making all in .
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Making all in opts
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make[3]: Entering directory '/root/asi_db/builds/curl/_worktrees/w0/docs/libcurl'
make[3]: Nothing to be done for 'all-am'.
make[3]: Leaving directory '/root/asi_db/builds/curl/_worktrees/w0/docs/libcurl'
make[2]: Leaving directory '/root/asi_db/builds/curl/_worktrees/w0/docs/libcurl'
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make[1]: Entering directory '/root/asi_db/builds/curl/_worktrees/w0/src'
  CC       slist_wc.o
  CC       terminal.o
  CC       tool_binmode.o
  CC       tool_bname.o
  CC       tool_cb_dbg.o
  CC       tool_cb_hdr.o
  CC       tool_cb_prg.o
  CC       tool_cb_rea.o
  CC       tool_cb_see.o
  CC       tool_cb_soc.o
  CC       tool_cb_wrt.o
  CC       tool_cfgable.o
  CC       tool_dirhie.o
  CC       tool_doswin.o
  CC       tool_easysrc.o
  CC       tool_filetime.o
  CC       tool_findfile.o
  CC       tool_formparse.o
  CC       tool_getparam.o
  CC       tool_getpass.o
  CC       tool_help.o
echo '#include "tool_hugehelp.h"' >> tool_hugehelp.c
  CC       tool_helpers.o
  CC       tool_ipfs.o
  CC       tool_libinfo.o
  CC       tool_listhelp.o
  CC       tool_main.o
  CC       tool_msgs.o
  CC       tool_operate.o
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  CC       tool_paramhlp.o
  CC       tool_parsecfg.o
  CC       tool_progress.o
  CC       tool_setopt.o
  CC       tool_sleep.o
  CC       tool_stderr.o
  CC       tool_strdup.o
  CC       tool_urlglob.o
  CC       tool_util.o
  CC       tool_vms.o
  CC       tool_writeout.o
  CC       tool_writeout_json.o
  CC       tool_xattr.o
  CC       var.o
echo 'extern const void *curl_ca_embed; const void *curl_ca_embed;' > tool_ca_embed.c
  CC       tool_hugehelp.o
  CC       tool_ca_embed.o
  CC       ../lib/base64.o
  CC       ../lib/curl_multibyte.o
  CC       ../lib/dynbuf.o
  CC       ../lib/nonblock.o
  CC       ../lib/strtoofft.o
  CC       ../lib/timediff.o
  CC       ../lib/version_win32.o
  CC       ../lib/warnless.o
  CCLD     curl
make[1]: Leaving directory '/root/asi_db/builds/curl/_worktrees/w0/src'
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make[1]: Nothing to be done for 'all-am'.
make[1]: Leaving directory '/root/asi_db/builds/curl/_worktrees/w0'

Commit Diff GitHub →

lib/cf-socket.c+4 -3
@@ -679,12 +679,13 @@ static CURLcode bindlocal(struct Curl_easy *data, struct connectdata *conn,
conn->ip_version = ipver;
if(h) {
+ int h_af = h->addr->ai_family;
/* convert the resolved address, sizeof myhost >= INET_ADDRSTRLEN */
Curl_printable_address(h->addr, myhost, sizeof(myhost));
infof(data, "Name '%s' family %i resolved to '%s' family %i",
- host, af, myhost, h->addr->ai_family);
- Curl_resolv_unlock(data, h);
- if(af != h->addr->ai_family) {
+ host, af, myhost, h_af);
+ Curl_resolv_unlink(data, &h); /* this will NULL, potential free h */
+ if(af != h_af) {
/* bad IP version combo, signal the caller to try another address
family if available */
return CURLE_UNSUPPORTED_PROTOCOL;
lib/conncache.c+3 -5
@@ -772,10 +772,8 @@ static void connc_run_conn_shutdown_handler(struct Curl_easy *data,
struct connectdata *conn)
{
if(!conn->bits.shutdown_handler) {
- if(conn->dns_entry) {
- Curl_resolv_unlock(data, conn->dns_entry);
- conn->dns_entry = NULL;
- }
+ if(conn->dns_entry)
+ Curl_resolv_unlink(data, &conn->dns_entry);
/* Cleanup NTLM connection-related data */
Curl_http_auth_cleanup_ntlm(conn);
@@ -1178,7 +1176,7 @@ void Curl_conncache_print(struct conncache *connc)
while(curr) {
conn = curr->ptr;
- fprintf(stderr, " [%p %d]", (void *)conn, conn->inuse);
+ fprintf(stderr, " [%p %d]", (void *)conn, conn->refcount);
curr = curr->next;
}
fprintf(stderr, "\n");
lib/doh.c+1 -1
@@ -1360,7 +1360,7 @@ CURLcode Curl_doh_is_resolved(struct Curl_easy *data,
Curl_share_lock(data, CURL_LOCK_DATA_DNS, CURL_LOCK_ACCESS_SINGLE);
/* we got a response, store it in the cache */
- dns = Curl_cache_addr(data, ai, dohp->host, 0, dohp->port);
+ dns = Curl_cache_addr(data, ai, dohp->host, 0, dohp->port, FALSE);
if(data->share)
Curl_share_unlock(data, CURL_LOCK_DATA_DNS);
lib/ftp.c+11 -11
@@ -1042,7 +1042,7 @@ static CURLcode ftp_state_use_port(struct Curl_easy *data,
int error;
char *host = NULL;
char *string_ftpport = data->set.str[STRING_FTPPORT];
- struct Curl_dns_entry *h = NULL;
+ struct Curl_dns_entry *dns_entry = NULL;
unsigned short port_min = 0;
unsigned short port_max = 0;
unsigned short port;
@@ -1178,15 +1178,12 @@ static CURLcode ftp_state_use_port(struct Curl_easy *data,
}
/* resolv ip/host to ip */
- rc = Curl_resolv(data, host, 0, FALSE, &h);
+ rc = Curl_resolv(data, host, 0, FALSE, &dns_entry);
if(rc == CURLRESOLV_PENDING)
- (void)Curl_resolver_wait_resolv(data, &h);
- if(h) {
- res = h->addr;
- /* when we return from this function, we can forget about this entry
- to we can unlock it now already */
- Curl_resolv_unlock(data, h);
- } /* (h) */
+ (void)Curl_resolver_wait_resolv(data, &dns_entry);
+ if(dns_entry) {
+ res = dns_entry->addr;
+ }
else
res = NULL; /* failure! */
@@ -1381,6 +1378,9 @@ static CURLcode ftp_state_use_port(struct Curl_easy *data,
ftp_state(data, FTP_PORT);
out:
+ /* If we looked up a dns_entry, now is the time to safely release it */
+ if(dns_entry)
+ Curl_resolv_unlink(data, &dns_entry);
if(result) {
ftp_state(data, FTP_STOP);
}
@@ -2098,7 +2098,7 @@ static CURLcode ftp_state_pasv_resp(struct Curl_easy *data,
CURL_CF_SSL_ENABLE : CURL_CF_SSL_DISABLE);
if(result) {
- Curl_resolv_unlock(data, addr); /* we are done using this address */
+ Curl_resolv_unlink(data, &addr); /* we are done using this address */
if(ftpc->count1 == 0 && ftpcode == 229)
return ftp_epsv_disable(data, conn);
@@ -2116,7 +2116,7 @@ static CURLcode ftp_state_pasv_resp(struct Curl_easy *data,
/* this just dumps information about this second connection */
ftp_pasv_verbose(data, addr->addr, ftpc->newhost, connectport);
- Curl_resolv_unlock(data, addr); /* we are done using this address */
+ Curl_resolv_unlink(data, &addr); /* we are done using this address */
Curl_safefree(conn->secondaryhostname);
conn->secondary_port = ftpc->newport;
lib/hostasyn.c+1 -1
@@ -79,7 +79,7 @@ CURLcode Curl_addrinfo_callback(struct Curl_easy *data,
dns = Curl_cache_addr(data, ai,
data->state.async.hostname, 0,
- data->state.async.port);
+ data->state.async.port, FALSE);
if(data->share)
Curl_share_unlock(data, CURL_LOCK_DATA_DNS);
lib/hostip.c+45 -40
@@ -115,7 +115,7 @@
* CURLRES_* defines based on the config*.h and curl_setup.h defines.
*/
-static void freednsentry(void *freethis);
+static void hostcache_unlink_entry(void *entry);
#ifndef CURL_DISABLE_VERBOSE_STRINGS
static void show_resolve_info(struct Curl_easy *data,
@@ -178,7 +178,7 @@ create_hostcache_id(const char *name,
struct hostcache_prune_data {
time_t now;
time_t oldest; /* oldest time in cache not pruned. */
- int cache_timeout;
+ int max_age_sec;
};
/*
@@ -189,16 +189,16 @@ struct hostcache_prune_data {
* cache.
*/
static int
-hostcache_timestamp_remove(void *datap, void *hc)
+hostcache_entry_is_stale(void *datap, void *hc)
{
struct hostcache_prune_data *prune =
(struct hostcache_prune_data *) datap;
- struct Curl_dns_entry *c = (struct Curl_dns_entry *) hc;
+ struct Curl_dns_entry *dns = (struct Curl_dns_entry *) hc;
- if(c->timestamp) {
+ if(dns->timestamp) {
/* age in seconds */
- time_t age = prune->now - c->timestamp;
- if(age >= prune->cache_timeout)
+ time_t age = prune->now - dns->timestamp;
+ if(age >= prune->max_age_sec)
return TRUE;
if(age > prune->oldest)
prune->oldest = age;
@@ -216,13 +216,13 @@ hostcache_prune(struct Curl_hash *hostcache, int cache_timeout,
{
struct hostcache_prune_data user;
- user.cache_timeout = cache_timeout;
+ user.max_age_sec = cache_timeout;
user.now = now;
user.oldest = 0;
Curl_hash_clean_with_criterium(hostcache,
(void *) &user,
- hostcache_timestamp_remove);
+ hostcache_entry_is_stale);
return user.oldest;
}
@@ -299,10 +299,10 @@ static struct Curl_dns_entry *fetch_addr(struct Curl_easy *data,
struct hostcache_prune_data user;
user.now = time(NULL);
- user.cache_timeout = data->set.dns_cache_timeout;
+ user.max_age_sec = data->set.dns_cache_timeout;
user.oldest = 0;
- if(hostcache_timestamp_remove(&user, dns)) {
+ if(hostcache_entry_is_stale(&user, dns)) {
infof(data, "Hostname in DNS cache was stale, zapped");
dns = NULL; /* the memory deallocation is being handled by the hash */
Curl_hash_delete(data->dns.hostcache, entry_id, entry_len + 1);
@@ -348,7 +348,7 @@ static struct Curl_dns_entry *fetch_addr(struct Curl_easy *data,
*
* Returns the Curl_dns_entry entry pointer or NULL if not in the cache.
*
- * The returned data *MUST* be "unlocked" with Curl_resolv_unlock() after
+ * The returned data *MUST* be "released" with Curl_resolv_unlink() after
* use, or we will leak memory!
*/
struct Curl_dns_entry *
@@ -364,7 +364,7 @@ Curl_fetch_addr(struct Curl_easy *data,
dns = fetch_addr(data, hostname, port);
if(dns)
- dns->inuse++; /* we use it! */
+ dns->refcount++; /* we use it! */
if(data->share)
Curl_share_unlock(data, CURL_LOCK_DATA_DNS);
@@ -468,7 +468,8 @@ Curl_cache_addr(struct Curl_easy *data,
struct Curl_addrinfo *addr,
const char *hostname,
size_t hostlen, /* length or zero */
- int port)
+ int port,
+ bool permanent)
{
char entry_id[MAX_HOSTCACHE_LEN];
size_t entry_len;
@@ -496,11 +497,15 @@ Curl_cache_addr(struct Curl_easy *data,
entry_len = create_hostcache_id(hostname, hostlen, port,
entry_id, sizeof(entry_id));
- dns->inuse = 1; /* the cache has the first reference */
+ dns->refcount = 1; /* the cache has the first reference */
dns->addr = addr; /* this is the address(es) */
- time(&dns->timestamp);
- if(dns->timestamp == 0)
- dns->timestamp = 1; /* zero indicates permanent CURLOPT_RESOLVE entry */
+ if(permanent)
+ dns->timestamp = 0; /* an entry that never goes stale */
+ else {
+ dns->timestamp = time(NULL);
+ if(dns->timestamp == 0)
+ dns->timestamp = 1;
+ }
dns->hostport = port;
if(hostlen)
memcpy(dns->hostname, hostname, hostlen);
@@ -514,7 +519,7 @@ Curl_cache_addr(struct Curl_easy *data,
}
dns = dns2;
- dns->inuse++; /* mark entry as in-use */
+ dns->refcount++; /* mark entry as in-use */
return dns;
}
@@ -666,8 +671,8 @@ static bool tailmatch(const char *full, const char *part)
* resolves. See the return codes.
*
* The cache entry we return will get its 'inuse' counter increased when this
- * function is used. You MUST call Curl_resolv_unlock() later (when you are
- * done using this struct) to decrease the counter again.
+ * function is used. You MUST call Curl_resolv_unlink() later (when you are
+ * done using this struct) to decrease the reference counter again.
*
* Return codes:
*
@@ -708,7 +713,7 @@ enum resolve_t Curl_resolv(struct Curl_easy *data,
if(dns) {
infof(data, "Hostname %s was found in DNS cache", hostname);
- dns->inuse++; /* we use it! */
+ dns->refcount++; /* we use it! */
rc = CURLRESOLV_RESOLVED;
}
@@ -828,7 +833,7 @@ enum resolve_t Curl_resolv(struct Curl_easy *data,
Curl_share_lock(data, CURL_LOCK_DATA_DNS, CURL_LOCK_ACCESS_SINGLE);
/* we got a response, store it in the cache */
- dns = Curl_cache_addr(data, addr, hostname, 0, port);
+ dns = Curl_cache_addr(data, addr, hostname, 0, port, FALSE);
if(data->share)
Curl_share_unlock(data, CURL_LOCK_DATA_DNS);
@@ -868,8 +873,8 @@ void alarmfunc(int sig)
* resolves. See the return codes.
*
* The cache entry we return will get its 'inuse' counter increased when this
- * function is used. You MUST call Curl_resolv_unlock() later (when you are
- * done using this struct) to decrease the counter again.
+ * function is used. You MUST call Curl_resolv_unlink() later (when you are
+ * done using this struct) to decrease the reference counter again.
*
* If built with a synchronous resolver and use of signals is not
* disabled by the application, then a nonzero timeout will cause a
@@ -1037,18 +1042,20 @@ clean_up:
}
/*
- * Curl_resolv_unlock() unlocks the given cached DNS entry. When this has been
- * made, the struct may be destroyed due to pruning. It is important that only
- * one unlock is made for each Curl_resolv() call.
+ * Curl_resolv_unlink() releases a reference to the given cached DNS entry.
+ * When the reference count reaches 0, the entry is destroyed. It is important
+ * that only one unlink is made for each Curl_resolv() call.
*
* May be called with 'data' == NULL for global cache.
*/
-void Curl_resolv_unlock(struct Curl_easy *data, struct Curl_dns_entry *dns)
+void Curl_resolv_unlink(struct Curl_easy *data, struct Curl_dns_entry **pdns)
{
+ struct Curl_dns_entry *dns = *pdns;
+ *pdns = NULL;
if(data && data->share)
Curl_share_lock(data, CURL_LOCK_DATA_DNS, CURL_LOCK_ACCESS_SINGLE);
- freednsentry(dns);
+ hostcache_unlink_entry(dns);
if(data && data->share)
Curl_share_unlock(data, CURL_LOCK_DATA_DNS);
@@ -1057,13 +1064,13 @@ void Curl_resolv_unlock(struct Curl_easy *data, struct Curl_dns_entry *dns)
/*
* File-internal: release cache dns entry reference, free if inuse drops to 0
*/
-static void freednsentry(void *freethis)
+static void hostcache_unlink_entry(void *entry)
{
- struct Curl_dns_entry *dns = (struct Curl_dns_entry *) freethis;
- DEBUGASSERT(dns && (dns->inuse>0));
+ struct Curl_dns_entry *dns = (struct Curl_dns_entry *) entry;
+ DEBUGASSERT(dns && (dns->refcount>0));
- dns->inuse--;
- if(dns->inuse == 0) {
+ dns->refcount--;
+ if(dns->refcount == 0) {
Curl_freeaddrinfo(dns->addr);
#ifdef USE_HTTPSRR
if(dns->hinfo) {
@@ -1092,7 +1099,7 @@ static void freednsentry(void *freethis)
void Curl_init_dnscache(struct Curl_hash *hash, size_t size)
{
Curl_hash_init(hash, size, Curl_hash_str, Curl_str_key_compare,
- freednsentry);
+ hostcache_unlink_entry);
}
/*
@@ -1285,13 +1292,11 @@ err:
}
/* put this new host in the cache */
- dns = Curl_cache_addr(data, head, host_begin, hlen, port);
+ dns = Curl_cache_addr(data, head, host_begin, hlen, port, permanent);
if(dns) {
- if(permanent)
- dns->timestamp = 0; /* mark as permanent */
/* release the returned reference; the cache itself will keep the
* entry alive: */
- dns->inuse--;
+ dns->refcount--;
}
if(data->share)
lib/hostip.h+10 -9
@@ -99,8 +99,8 @@ struct Curl_dns_entry {
#endif
/* timestamp == 0 -- permanent CURLOPT_RESOLVE entry (does not time out) */
time_t timestamp;
- /* use-counter, use Curl_resolv_unlock to release reference */
- long inuse;
+ /* reference counter, entry is freed on reaching 0 */
+ size_t refcount;
/* hostname port number that resolved to addr. */
int hostport;
/* hostname that resolved to addr. may be NULL (unix domain sockets). */
@@ -113,7 +113,7 @@ bool Curl_host_is_ipnum(const char *hostname);
* Curl_resolv() returns an entry with the info for the specified host
* and port.
*
- * The returned data *MUST* be "unlocked" with Curl_resolv_unlock() after
+ * The returned data *MUST* be "released" with Curl_resolv_unlink() after
* use, or we will leak memory!
*/
/* return codes */
@@ -161,9 +161,9 @@ struct Curl_addrinfo *Curl_getaddrinfo(struct Curl_easy *data,
int *waitp);
-/* unlock a previously resolved dns entry */
-void Curl_resolv_unlock(struct Curl_easy *data,
- struct Curl_dns_entry *dns);
+/* unlink a dns entry, potentially shared with a cache */
+void Curl_resolv_unlink(struct Curl_easy *data,
+ struct Curl_dns_entry **pdns);
/* init a new dns cache */
void Curl_init_dnscache(struct Curl_hash *hash, size_t hashsize);
@@ -199,7 +199,7 @@ void Curl_printable_address(const struct Curl_addrinfo *ip,
*
* Returns the Curl_dns_entry entry pointer or NULL if not in the cache.
*
- * The returned data *MUST* be "unlocked" with Curl_resolv_unlock() after
+ * The returned data *MUST* be "released" with Curl_resolv_unlink() after
* use, or we will leak memory!
*/
struct Curl_dns_entry *
@@ -209,12 +209,13 @@ Curl_fetch_addr(struct Curl_easy *data,
/*
* Curl_cache_addr() stores a 'Curl_addrinfo' struct in the DNS cache.
- *
+ * @param permanent iff TRUE, entry will never become stale
* Returns the Curl_dns_entry entry pointer or NULL if the storage failed.
*/
struct Curl_dns_entry *
Curl_cache_addr(struct Curl_easy *data, struct Curl_addrinfo *addr,
- const char *hostname, size_t hostlen, int port);
+ const char *hostname, size_t hostlen, int port,
+ bool permanent);
#ifndef INADDR_NONE
#define CURL_INADDR_NONE (in_addr_t) ~0
lib/multi.c+2 -4
@@ -742,10 +742,8 @@ static CURLcode multi_done(struct Curl_easy *data,
data->state.done = TRUE; /* called just now! */
- if(conn->dns_entry) {
- Curl_resolv_unlock(data, conn->dns_entry); /* done with this */
- conn->dns_entry = NULL;
- }
+ if(conn->dns_entry)
+ Curl_resolv_unlink(data, &conn->dns_entry); /* done with this */
Curl_hostcache_prune(data);
/* if data->set.reuse_forbid is TRUE, it means the libcurl client has
lib/socks.c+2 -2
@@ -388,7 +388,7 @@ CONNECT_RESOLVED:
infof(data, "SOCKS4 connect to IPv4 %s (locally resolved)", buf);
- Curl_resolv_unlock(data, dns); /* not used anymore from now on */
+ Curl_resolv_unlink(data, &dns); /* not used anymore from now on */
}
else
failf(data, "SOCKS4 connection to %s not supported", sx->hostname);
@@ -893,7 +893,7 @@ CONNECT_RESOLVED:
failf(data, "SOCKS5 connection to %s not supported", dest);
}
- Curl_resolv_unlock(data, dns); /* not used anymore from now on */
+ Curl_resolv_unlink(data, &dns); /* not used anymore from now on */
goto CONNECT_REQ_SEND;
}
CONNECT_RESOLVE_REMOTE:
lib/url.c+59 -111
@@ -637,10 +637,8 @@ void Curl_disconnect(struct Curl_easy *data,
return;
}
- if(conn->dns_entry) {
- Curl_resolv_unlock(data, conn->dns_entry);
- conn->dns_entry = NULL;
- }
+ if(conn->dns_entry)
+ Curl_resolv_unlink(data, &conn->dns_entry);
/* Cleanup NTLM connection-related data */
Curl_http_auth_cleanup_ntlm(conn);
@@ -3101,140 +3099,82 @@ static CURLcode resolve_unix(struct Curl_easy *data,
return longpath ? CURLE_COULDNT_RESOLVE_HOST : CURLE_OUT_OF_MEMORY;
}
- hostaddr->inuse++;
+ hostaddr->refcount = 1; /* connection is the only one holding this */
conn->dns_entry = hostaddr;
return CURLE_OK;
}
#endif
-#ifndef CURL_DISABLE_PROXY
-static CURLcode resolve_proxy(struct Curl_easy *data,
- struct connectdata *conn,
- bool *async)
+/*************************************************************
+ * Resolve the address of the server or proxy
+ *************************************************************/
+static CURLcode resolve_server(struct Curl_easy *data,
+ struct connectdata *conn,
+ bool *async)
{
- struct Curl_dns_entry *hostaddr = NULL;
- struct hostname *host;
+ struct hostname *ehost;
timediff_t timeout_ms = Curl_timeleft(data, NULL, TRUE);
+ const char *peertype = "host";
int rc;
+#ifdef USE_UNIX_SOCKETS
+ char *unix_path = conn->unix_domain_socket;
- DEBUGASSERT(conn->dns_entry == NULL);
-
- host = conn->bits.socksproxy ? &conn->socks_proxy.host :
- &conn->http_proxy.host;
-
- conn->hostname_resolve = strdup(host->name);
- if(!conn->hostname_resolve)
- return CURLE_OUT_OF_MEMORY;
+#ifndef CURL_DISABLE_PROXY
+ if(!unix_path && CONN_IS_PROXIED(conn) && conn->socks_proxy.host.name &&
+ !strncmp(UNIX_SOCKET_PREFIX"/",
+ conn->socks_proxy.host.name, sizeof(UNIX_SOCKET_PREFIX)))
+ unix_path = conn->socks_proxy.host.name + sizeof(UNIX_SOCKET_PREFIX) - 1;
+#endif
- rc = Curl_resolv_timeout(data, conn->hostname_resolve,
- conn->primary.remote_port, &hostaddr, timeout_ms);
- conn->dns_entry = hostaddr;
- if(rc == CURLRESOLV_PENDING)
- *async = TRUE;
- else if(rc == CURLRESOLV_TIMEDOUT)
- return CURLE_OPERATION_TIMEDOUT;
- else if(!hostaddr) {
- failf(data, "Couldn't resolve proxy '%s'", host->dispname);
- return CURLE_COULDNT_RESOLVE_PROXY;
+ if(unix_path) {
+ /* TODO, this only works if previous transport is TRNSPRT_TCP. Check it? */
+ conn->transport = TRNSPRT_UNIX;
+ return resolve_unix(data, conn, unix_path);
}
-
- return CURLE_OK;
-}
#endif
-static CURLcode resolve_host(struct Curl_easy *data,
- struct connectdata *conn,
- bool *async)
-{
- struct Curl_dns_entry *hostaddr = NULL;
- struct hostname *connhost;
- timediff_t timeout_ms = Curl_timeleft(data, NULL, TRUE);
- int rc;
-
DEBUGASSERT(conn->dns_entry == NULL);
- connhost = conn->bits.conn_to_host ? &conn->conn_to_host : &conn->host;
-
- /* If not connecting via a proxy, extract the port from the URL, if it is
- * there, thus overriding any defaults that might have been set above. */
- conn->primary.remote_port = conn->bits.conn_to_port ? conn->conn_to_port :
- conn->remote_port;
+#ifndef CURL_DISABLE_PROXY
+ if(CONN_IS_PROXIED(conn)) {
+ ehost = conn->bits.socksproxy ? &conn->socks_proxy.host :
+ &conn->http_proxy.host;
+ peertype = "proxy";
+ }
+ else
+#endif
+ {
+ ehost = conn->bits.conn_to_host ? &conn->conn_to_host : &conn->host;
+ /* If not connecting via a proxy, extract the port from the URL, if it is
+ * there, thus overriding any defaults that might have been set above. */
+ conn->primary.remote_port = conn->bits.conn_to_port ? conn->conn_to_port :
+ conn->remote_port;
+ }
/* Resolve target host right on */
- conn->hostname_resolve = strdup(connhost->name);
+ conn->hostname_resolve = strdup(ehost->name);
if(!conn->hostname_resolve)
return CURLE_OUT_OF_MEMORY;
rc = Curl_resolv_timeout(data, conn->hostname_resolve,
- conn->primary.remote_port, &hostaddr, timeout_ms);
- conn->dns_entry = hostaddr;
+ conn->primary.remote_port,
+ &conn->dns_entry, timeout_ms);
if(rc == CURLRESOLV_PENDING)
*async = TRUE;
else if(rc == CURLRESOLV_TIMEDOUT) {
- failf(data, "Failed to resolve host '%s' with timeout after %"
- CURL_FORMAT_TIMEDIFF_T " ms", connhost->dispname,
+ failf(data, "Failed to resolve %s '%s' with timeout after %"
+ CURL_FORMAT_TIMEDIFF_T " ms", peertype, ehost->dispname,
Curl_timediff(Curl_now(), data->progress.t_startsingle));
return CURLE_OPERATION_TIMEDOUT;
}
- else if(!hostaddr) {
- failf(data, "Could not resolve host: %s", connhost->dispname);
+ else if(!conn->dns_entry) {
+ failf(data, "Could not resolve %s: %s", peertype, ehost->dispname);
return CURLE_COULDNT_RESOLVE_HOST;
}
return CURLE_OK;
}
-/* Perform a fresh resolve */
-static CURLcode resolve_fresh(struct Curl_easy *data,
- struct connectdata *conn,
- bool *async)
-{
-#ifdef USE_UNIX_SOCKETS
- char *unix_path = conn->unix_domain_socket;
-
-#ifndef CURL_DISABLE_PROXY
- if(!unix_path && conn->socks_proxy.host.name &&
- !strncmp(UNIX_SOCKET_PREFIX"/",
- conn->socks_proxy.host.name, sizeof(UNIX_SOCKET_PREFIX)))
- unix_path = conn->socks_proxy.host.name + sizeof(UNIX_SOCKET_PREFIX) - 1;
-#endif
-
- if(unix_path) {
- conn->transport = TRNSPRT_UNIX;
- return resolve_unix(data, conn, unix_path);
- }
-#endif
-
-#ifndef CURL_DISABLE_PROXY
- if(CONN_IS_PROXIED(conn))
- return resolve_proxy(data, conn, async);
-#endif
-
- return resolve_host(data, conn, async);
-}
-
-/*************************************************************
- * Resolve the address of the server or proxy
- *************************************************************/
-static CURLcode resolve_server(struct Curl_easy *data,
- struct connectdata *conn,
- bool *async)
-{
- DEBUGASSERT(conn);
- DEBUGASSERT(data);
-
- /* Resolve the name of the server or proxy */
- if(conn->bits.reuse) {
- /* We are reusing the connection - no need to resolve anything, and
- idnconvert_hostname() was called already in create_conn() for the reuse
- case. */
- *async = FALSE;
- return CURLE_OK;
- }
-
- return resolve_fresh(data, conn, async);
-}
-
/*
* Cleanup the connection `temp`, just allocated for `data`, before using the
* previously `existing` one for `data`. All relevant info is copied over
@@ -3708,12 +3648,20 @@ static CURLcode create_conn(struct Curl_easy *data,
/* Continue connectdata initialization here. */
- /*************************************************************
- * Resolve the address of the server or proxy
- *************************************************************/
- result = resolve_server(data, conn, async);
- if(result)
- goto out;
+ if(conn->bits.reuse) {
+ /* We are reusing the connection - no need to resolve anything, and
+ idnconvert_hostname() was called already in create_conn() for the reuse
+ case. */
+ *async = FALSE;
+ }
+ else {
+ /*************************************************************
+ * Resolve the address of the server or proxy
+ *************************************************************/
+ result = resolve_server(data, conn, async);
+ if(result)
+ goto out;
+ }
/* Everything general done, inform filters that they need
* to prepare for a data transfer.
lib/urldata.h+2 -1
@@ -831,7 +831,8 @@ struct connectdata {
struct proxy_info http_proxy;
#endif
/* 'primary' and 'secondary' get filled with IP quadruple
- (local/remote numerical ip address and port) whenever a is *attempted*.
+ (local/remote numerical ip address and port) whenever a connect is
+ *attempted*.
When more than one address is tried for a connection these will hold data
for the last attempt. When the connection is actually established
these are updated with data which comes directly from the socket. */
lib/vtls/openssl.c+1 -1
@@ -3897,7 +3897,7 @@ CURLcode Curl_ossl_ctx_init(struct ossl_ctx *octx,
if(data->set.tls_ech & CURLECH_HARD)
return CURLE_SSL_CONNECT_ERROR;
}
- Curl_resolv_unlock(data, dns);
+ Curl_resolv_unlink(data, &dns);
}
}
# ifdef OPENSSL_IS_BORINGSSL
lib/vtls/wolfssl.c+1 -1
@@ -988,7 +988,7 @@ wolfssl_connect_step1(struct Curl_cfilter *cf, struct Curl_easy *data)
if(data->set.tls_ech & CURLECH_HARD)
return CURLE_SSL_CONNECT_ERROR;
}
- Curl_resolv_unlock(data, dns);
+ Curl_resolv_unlink(data, &dns);
}
}
tests/unit/unit1305.c+1 -1
@@ -122,7 +122,7 @@ UNITTEST_START
abort_unless(rc == CURLE_OK, "data node creation failed");
key_len = strlen(data_key);
- data_node->inuse = 1; /* hash will hold the reference */
+ data_node->refcount = 1; /* hash will hold the reference */
nodep = Curl_hash_add(&hp, data_key, key_len + 1, data_node);
abort_unless(nodep, "insertion into hash failed");
/* Freeing will now be done by Curl_hash_destroy */