refine core, move specified functions to kernel utility.

@@ -346,7 +346,7 @@ function write_nginx_html5()
 END
 END
 }
 }
 # create the nginx dir, for http-server if not build nginx
 # create the nginx dir, for http-server if not build nginx
-rm -rf ${SRS_OBJS}/nginx && mkdir -p ${SRS_OBJS}/nginx
+mkdir -p ${SRS_OBJS}/nginx
 # make nginx
 # make nginx
 __SRS_BUILD_NGINX=NO; if [ $SRS_EMBEDED_CPU = NO ]; then if [ $SRS_NGINX = YES ]; then __SRS_BUILD_NGINX=YES; fi fi
 __SRS_BUILD_NGINX=NO; if [ $SRS_EMBEDED_CPU = NO ]; then if [ $SRS_NGINX = YES ]; then __SRS_BUILD_NGINX=YES; fi fi
 if [ $__SRS_BUILD_NGINX = YES ]; then
 if [ $__SRS_BUILD_NGINX = YES ]; then

@@ -70,6 +70,8 @@ SRS_PURE_RTMP=NO
 SRS_RTMP_HLS=NO
 SRS_RTMP_HLS=NO
 # the most fast compile, nothing, only support vp6 RTMP.
 # the most fast compile, nothing, only support vp6 RTMP.
 SRS_DISABLE_ALL=NO
 SRS_DISABLE_ALL=NO
+# all features is on
+SRS_ENABLE_ALL=NO
 #
 #
 # calc
 # calc
 # whether embed cpu, arm/mips
 # whether embed cpu, arm/mips
@@ -146,6 +148,7 @@ Presets:
   --pure-rtmp               only support RTMP with ssl.
   --pure-rtmp               only support RTMP with ssl.
   --rtmp-hls                only support RTMP+HLS with ssl.
   --rtmp-hls                only support RTMP+HLS with ssl.
   --disable-all             disable all features, only support vp6 RTMP.
   --disable-all             disable all features, only support vp6 RTMP.
+  --full                    enable all features.
   
   
 Conflicts:
 Conflicts:
   1. --with-gmc vs --with-gmp: 
   1. --with-gmc vs --with-gmp: 
@@ -229,6 +232,7 @@ function parse_user_option() {
         --disable-all)                  SRS_DISABLE_ALL=YES         ;;
         --disable-all)                  SRS_DISABLE_ALL=YES         ;;
         --pure-rtmp)                    SRS_PURE_RTMP=YES           ;;
         --pure-rtmp)                    SRS_PURE_RTMP=YES           ;;
         --rtmp-hls)                     SRS_RTMP_HLS=YES            ;;
         --rtmp-hls)                     SRS_RTMP_HLS=YES            ;;
+        --full)                         SRS_ENABLE_ALL=YES          ;;
         
         
         --use-sys-ssl)                  SRS_USE_SYS_SSL=YES         ;;
         --use-sys-ssl)                  SRS_USE_SYS_SSL=YES         ;;
 
 
@@ -272,12 +276,14 @@ function apply_user_presets() {
         if [ $SRS_PURE_RTMP = NO ]; then
         if [ $SRS_PURE_RTMP = NO ]; then
             if [ $SRS_FAST = NO ]; then
             if [ $SRS_FAST = NO ]; then
                 if [ $SRS_DISABLE_ALL = NO ]; then
                 if [ $SRS_DISABLE_ALL = NO ]; then
-                    if [ $SRS_DEV = NO ]; then
-                        if [ $SRS_ARM_UBUNTU12 = NO ]; then
-                            if [ $SRS_MIPS_UBUNTU12 = NO ]; then
-                                if [ $SRS_PI = NO ]; then
-                                    if [ $SRS_X86_X64 = NO ]; then
-                                        SRS_X86_X64=YES; opt="--x86-x64 $opt";
+                    if [ $SRS_ENABLE_ALL = NO ]; then
+                        if [ $SRS_DEV = NO ]; then
+                            if [ $SRS_ARM_UBUNTU12 = NO ]; then
+                                if [ $SRS_MIPS_UBUNTU12 = NO ]; then
+                                    if [ $SRS_PI = NO ]; then
+                                        if [ $SRS_X86_X64 = NO ]; then
+                                            SRS_X86_X64=YES; opt="--x86-x64 $opt";
+                                        fi
                                     fi
                                     fi
                                 fi
                                 fi
                             fi
                             fi
@@ -321,6 +327,31 @@ function apply_user_presets() {
         SRS_STATIC=NO
         SRS_STATIC=NO
     fi
     fi
 
 
+    # all enabled.
+    if [ $SRS_ENABLE_ALL = YES ]; then
+        SRS_HLS=YES
+        SRS_DVR=YES
+        SRS_NGINX=YES
+        SRS_SSL=YES
+        SRS_FFMPEG_TOOL=YES
+        SRS_TRANSCODE=YES
+        SRS_INGEST=YES
+        SRS_HTTP_PARSER=YES
+        SRS_HTTP_CALLBACK=YES
+        SRS_HTTP_SERVER=YES
+        SRS_HTTP_API=YES
+        SRS_LIBRTMP=YES
+        SRS_BWTC=YES
+        SRS_RESEARCH=YES
+        SRS_UTEST=YES
+        SRS_GPERF=NO
+        SRS_GPERF_MC=NO
+        SRS_GPERF_MP=NO
+        SRS_GPERF_CP=NO
+        SRS_GPROF=NO
+        SRS_STATIC=NO
+    fi
+
     # only rtmp vp6
     # only rtmp vp6
     if [ $SRS_FAST = YES ]; then
     if [ $SRS_FAST = YES ]; then
         SRS_HLS=NO
         SRS_HLS=NO

@@ -29,6 +29,8 @@ CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */
 */
 #include <srs_core.hpp>
 #include <srs_core.hpp>
 
 
+#include <string>
+
 #ifdef SRS_AUTO_DVR
 #ifdef SRS_AUTO_DVR
 
 
 class SrsSource;
 class SrsSource;
@@ -238,4 +240,4 @@ public:
 
 
 #endif
 #endif
 
 
-#endif
+#endif

@@ -43,6 +43,7 @@ CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 #include <srs_core_autofree.hpp>
 #include <srs_core_autofree.hpp>
 #include <srs_app_socket.hpp>
 #include <srs_app_socket.hpp>
 #include <srs_app_kbps.hpp>
 #include <srs_app_kbps.hpp>
+#include <srs_kernel_utility.hpp>
 
 
 // when error, edge ingester sleep for a while and retry.
 // when error, edge ingester sleep for a while and retry.
 #define SRS_EDGE_INGESTER_SLEEP_US (int64_t)(1*1000*1000LL)
 #define SRS_EDGE_INGESTER_SLEEP_US (int64_t)(1*1000*1000LL)

@@ -33,6 +33,7 @@ using namespace std;
 #include <srs_app_pithy_print.hpp>
 #include <srs_app_pithy_print.hpp>
 #include <srs_protocol_rtmp_stack.hpp>
 #include <srs_protocol_rtmp_stack.hpp>
 #include <srs_app_ffmpeg.hpp>
 #include <srs_app_ffmpeg.hpp>
+#include <srs_kernel_utility.hpp>
 
 
 #ifdef SRS_AUTO_TRANSCODE
 #ifdef SRS_AUTO_TRANSCODE
 
 

@@ -40,6 +40,7 @@ CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 #include <srs_protocol_utility.hpp>
 #include <srs_protocol_utility.hpp>
 #include <srs_protocol_rtmp.hpp>
 #include <srs_protocol_rtmp.hpp>
 #include <srs_app_kbps.hpp>
 #include <srs_app_kbps.hpp>
+#include <srs_kernel_utility.hpp>
 
 
 // when error, forwarder sleep for a while and retry.
 // when error, forwarder sleep for a while and retry.
 #define SRS_FORWARDER_SLEEP_US (int64_t)(3*1000*1000LL)
 #define SRS_FORWARDER_SLEEP_US (int64_t)(3*1000*1000LL)

@@ -43,6 +43,7 @@ using namespace std;
 #include <srs_core_autofree.hpp>
 #include <srs_core_autofree.hpp>
 #include <srs_protocol_rtmp.hpp>
 #include <srs_protocol_rtmp.hpp>
 #include <srs_app_pithy_print.hpp>
 #include <srs_app_pithy_print.hpp>
+#include <srs_kernel_utility.hpp>
 
 
 // max PES packets size to flush the video.
 // max PES packets size to flush the video.
 #define SRS_AUTO_HLS_AUDIO_CACHE_SIZE 1024 * 1024
 #define SRS_AUTO_HLS_AUDIO_CACHE_SIZE 1024 * 1024

@@ -35,6 +35,7 @@ using namespace std;
 #include <srs_app_http_api.hpp>
 #include <srs_app_http_api.hpp>
 #include <srs_app_http_conn.hpp>
 #include <srs_app_http_conn.hpp>
 #include <srs_app_json.hpp>
 #include <srs_app_json.hpp>
+#include <srs_kernel_utility.hpp>
 
 
 #define SRS_DEFAULT_HTTP_PORT 80
 #define SRS_DEFAULT_HTTP_PORT 80
 
 

@@ -33,6 +33,7 @@ using namespace std;
 #include <srs_kernel_error.hpp>
 #include <srs_kernel_error.hpp>
 #include <srs_kernel_log.hpp>
 #include <srs_kernel_log.hpp>
 #include <srs_app_socket.hpp>
 #include <srs_app_socket.hpp>
+#include <srs_kernel_utility.hpp>
 
 
 SrsHttpClient::SrsHttpClient()
 SrsHttpClient::SrsHttpClient()
 {
 {

@@ -29,6 +29,8 @@ CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */
 */
 #include <srs_core.hpp>
 #include <srs_core.hpp>
 
 
+#include <string>
+
 #ifdef SRS_AUTO_HTTP_PARSER
 #ifdef SRS_AUTO_HTTP_PARSER
 
 
 #include <srs_app_st.hpp>
 #include <srs_app_st.hpp>

@@ -41,6 +41,7 @@ using namespace std;
 #include <srs_app_json.hpp>
 #include <srs_app_json.hpp>
 #include <srs_app_config.hpp>
 #include <srs_app_config.hpp>
 #include <srs_kernel_flv.hpp>
 #include <srs_kernel_flv.hpp>
+#include <srs_kernel_utility.hpp>
 
 
 #define SRS_HTTP_DEFAULT_PAGE "index.html"
 #define SRS_HTTP_DEFAULT_PAGE "index.html"
 
 

@@ -29,6 +29,8 @@ CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */
 */
 #include <srs_core.hpp>
 #include <srs_core.hpp>
 
 
+#include <string>
+
 #ifdef SRS_AUTO_HTTP_CALLBACK
 #ifdef SRS_AUTO_HTTP_CALLBACK
 
 
 #include <http_parser.h>
 #include <http_parser.h>
@@ -117,4 +119,4 @@ public:
 
 
 #endif
 #endif
 
 
-#endif
+#endif

@@ -32,6 +32,7 @@ using namespace std;
 #include <srs_kernel_log.hpp>
 #include <srs_kernel_log.hpp>
 #include <srs_app_ffmpeg.hpp>
 #include <srs_app_ffmpeg.hpp>
 #include <srs_app_pithy_print.hpp>
 #include <srs_app_pithy_print.hpp>
+#include <srs_kernel_utility.hpp>
 
 
 // when error, ingester sleep for a while and retry.
 // when error, ingester sleep for a while and retry.
 // ingest never sleep a long time, for we must start the stream ASAP.
 // ingest never sleep a long time, for we must start the stream ASAP.

@@ -33,6 +33,7 @@ CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 #include <srs_app_config.hpp>
 #include <srs_app_config.hpp>
 #include <srs_kernel_error.hpp>
 #include <srs_kernel_error.hpp>
 #include <srs_app_utility.hpp>
 #include <srs_app_utility.hpp>
+#include <srs_kernel_utility.hpp>
 
 
 SrsThreadContext::SrsThreadContext()
 SrsThreadContext::SrsThreadContext()
 {
 {

@@ -46,6 +46,9 @@ CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 #include <srs_app_utility.hpp>
 #include <srs_app_utility.hpp>
 #include <srs_app_heartbeat.hpp>
 #include <srs_app_heartbeat.hpp>
 
 
+// signal defines.
+#define SIGNAL_RELOAD SIGHUP
+
 #define SERVER_LISTEN_BACKLOG 512
 #define SERVER_LISTEN_BACKLOG 512
 
 
 // system interval
 // system interval

@@ -40,6 +40,7 @@ using namespace std;
 #include <srs_app_dvr.hpp>
 #include <srs_app_dvr.hpp>
 #include <srs_kernel_stream.hpp>
 #include <srs_kernel_stream.hpp>
 #include <srs_app_edge.hpp>
 #include <srs_app_edge.hpp>
+#include <srs_kernel_utility.hpp>
 
 
 #define CONST_MAX_JITTER_MS         500
 #define CONST_MAX_JITTER_MS         500
 #define DEFAULT_FRAME_TIME_MS         40
 #define DEFAULT_FRAME_TIME_MS         40

@@ -26,6 +26,10 @@ CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 #include <srs_kernel_error.hpp>
 #include <srs_kernel_error.hpp>
 #include <srs_kernel_log.hpp>
 #include <srs_kernel_log.hpp>
 
 
+// const time for st to convert to us
+#define SRS_TIME_MILLISECONDS 1000
+#define SRS_TIME_SECONDS 1000000
+
 ISrsThreadHandler::ISrsThreadHandler()
 ISrsThreadHandler::ISrsThreadHandler()
 {
 {
 }
 }
@@ -180,4 +184,4 @@ void* SrsThread::thread_fun(void* arg)
     st_thread_exit(NULL);
     st_thread_exit(NULL);
     
     
     return NULL;
     return NULL;
-}
+}

@@ -23,128 +23,3 @@ CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 
 
 #include <srs_core.hpp>
 #include <srs_core.hpp>
 
 
-#include <string.h>
-#include <netdb.h>
-#include <arpa/inet.h>
-
-using namespace std;
-
-string srs_string_replace(string str, string old_str, string new_str)
-{
-    std::string ret = str;
-    
-    if (old_str == new_str) {
-        return ret;
-    }
-    
-    size_t pos = 0;
-    while ((pos = ret.find(old_str, pos)) != std::string::npos) {
-        ret = ret.replace(pos, old_str.length(), new_str);
-    }
-    
-    return ret;
-}
-
-string srs_string_trim_end(string str, string trim_chars)
-{
-    std::string ret = str;
-    
-    for (int i = 0; i < (int)trim_chars.length(); i++) {
-        char ch = trim_chars.at(i);
-        
-        while (!ret.empty() && ret.at(ret.length() - 1) == ch) {
-            ret.erase(ret.end() - 1);
-            
-            // ok, matched, should reset the search
-            i = 0;
-        }
-    }
-    
-    return ret;
-}
-
-string srs_string_trim_start(string str, string trim_chars)
-{
-    std::string ret = str;
-    
-    for (int i = 0; i < (int)trim_chars.length(); i++) {
-        char ch = trim_chars.at(i);
-        
-        while (!ret.empty() && ret.at(0) == ch) {
-            ret.erase(ret.begin());
-            
-            // ok, matched, should reset the search
-            i = 0;
-        }
-    }
-    
-    return ret;
-}
-
-string srs_string_remove(string str, string remove_chars)
-{
-    std::string ret = str;
-    
-    for (int i = 0; i < (int)remove_chars.length(); i++) {
-        char ch = remove_chars.at(i);
-        
-        for (std::string::iterator it = ret.begin(); it != ret.end();) {
-            if (ch == *it) {
-                it = ret.erase(it);
-                
-                // ok, matched, should reset the search
-                i = 0;
-            } else {
-                ++it;
-            }
-        }
-    }
-    
-    return ret;
-}
-
-bool srs_string_ends_with(string str, string flag)
-{
-    return str.rfind(flag) == str.length() - flag.length();
-}
-
-string srs_dns_resolve(string host)
-{
-    if (inet_addr(host.c_str()) != INADDR_NONE) {
-        return host;
-    }
-    
-    hostent* answer = gethostbyname(host.c_str());
-    if (answer == NULL) {
-        return "";
-    }
-    
-    char ipv4[16];
-    memset(ipv4, 0, sizeof(ipv4));
-    for (int i = 0; i < answer->h_length; i++) {
-        inet_ntop(AF_INET, answer->h_addr_list[i], ipv4, sizeof(ipv4));
-        break;
-    }
-    
-    return ipv4;
-}
-
-bool srs_is_little_endian()
-{
-    // convert to network(big-endian) order, if not equals, 
-    // the system is little-endian, so need to convert the int64
-    static int little_endian_check = -1;
-    
-    if(little_endian_check == -1) {
-        union {
-            int32_t i;
-            int8_t c;
-        } little_check_union;
-        
-        little_check_union.i = 0x01;
-        little_endian_check = little_check_union.c;
-    }
-    
-    return (little_endian_check == 1);
-}
-

@@ -85,30 +85,6 @@ CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 // it's recomments to free each elem explicit.
 // it's recomments to free each elem explicit.
 // so we remove the srs_freepa utility.
 // so we remove the srs_freepa utility.
 
 
-// compare
-#define srs_min(a, b) (((a) < (b))? (a) : (b))
-#define srs_max(a, b) (((a) < (b))? (b) : (a))
-
-// signal defines.
-#define SIGNAL_RELOAD SIGHUP
-
-#include <string>
-// replace old_str to new_str of str
-extern std::string srs_string_replace(std::string str, std::string old_str, std::string new_str);
-// trim char in trim_chars of str
-extern std::string srs_string_trim_end(std::string str, std::string trim_chars);
-// trim char in trim_chars of str
-extern std::string srs_string_trim_start(std::string str, std::string trim_chars);
-// remove char in remove_chars of str
-extern std::string srs_string_remove(std::string str, std::string remove_chars);
-// whether string end with
-extern bool srs_string_ends_with(std::string str, std::string flag);
-
-// dns resolve utility, return the resolved ip address.
-extern std::string srs_dns_resolve(std::string host);
-// whether system is little endian
-extern bool srs_is_little_endian();
-
 /**
 /**
 * disable copy constructor of class
 * disable copy constructor of class
 */
 */
@@ -120,8 +96,4 @@ extern bool srs_is_little_endian();
         className(const className&); \
         className(const className&); \
         className& operator= (const className&)
         className& operator= (const className&)
 
 
-// const time for st to convert to us
-#define SRS_TIME_MILLISECONDS 1000
-#define SRS_TIME_SECONDS 1000000
-
 #endif
 #endif

@@ -29,6 +29,8 @@ CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */
 */
 #include <srs_core.hpp>
 #include <srs_core.hpp>
 
 
+#include <string>
+
 class SrsStream;
 class SrsStream;
 
 
 /**
 /**
@@ -173,4 +175,4 @@ public:
     virtual int read_previous_tag_size(char ts[4]);
     virtual int read_previous_tag_size(char ts[4]);
 };
 };
 
 
-#endif
+#endif

@@ -27,6 +27,7 @@ using namespace std;
 
 
 #include <srs_kernel_log.hpp>
 #include <srs_kernel_log.hpp>
 #include <srs_kernel_error.hpp>
 #include <srs_kernel_error.hpp>
+#include <srs_kernel_utility.hpp>
 
 
 SrsStream::SrsStream()
 SrsStream::SrsStream()
 {
 {

@@ -23,8 +23,13 @@ CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 
 
 #include <srs_kernel_utility.hpp>
 #include <srs_kernel_utility.hpp>
 
 
-#include <sys/time.h>
 #include <unistd.h>
 #include <unistd.h>
+#include <string.h>
+#include <netdb.h>
+#include <arpa/inet.h>
+#include <sys/time.h>
+
+using namespace std;
 
 
 #include <srs_kernel_log.hpp>
 #include <srs_kernel_log.hpp>
 
 
@@ -58,3 +63,122 @@ void srs_update_system_time_ms()
     
     
     _srs_system_time_us_cache = now_us;
     _srs_system_time_us_cache = now_us;
 }
 }
+
+string srs_dns_resolve(string host)
+{
+    if (inet_addr(host.c_str()) != INADDR_NONE) {
+        return host;
+    }
+    
+    hostent* answer = gethostbyname(host.c_str());
+    if (answer == NULL) {
+        return "";
+    }
+    
+    char ipv4[16];
+    memset(ipv4, 0, sizeof(ipv4));
+    for (int i = 0; i < answer->h_length; i++) {
+        inet_ntop(AF_INET, answer->h_addr_list[i], ipv4, sizeof(ipv4));
+        break;
+    }
+    
+    return ipv4;
+}
+
+bool srs_is_little_endian()
+{
+    // convert to network(big-endian) order, if not equals, 
+    // the system is little-endian, so need to convert the int64
+    static int little_endian_check = -1;
+    
+    if(little_endian_check == -1) {
+        union {
+            int32_t i;
+            int8_t c;
+        } little_check_union;
+        
+        little_check_union.i = 0x01;
+        little_endian_check = little_check_union.c;
+    }
+    
+    return (little_endian_check == 1);
+}
+
+string srs_string_replace(string str, string old_str, string new_str)
+{
+    std::string ret = str;
+    
+    if (old_str == new_str) {
+        return ret;
+    }
+    
+    size_t pos = 0;
+    while ((pos = ret.find(old_str, pos)) != std::string::npos) {
+        ret = ret.replace(pos, old_str.length(), new_str);
+    }
+    
+    return ret;
+}
+
+string srs_string_trim_end(string str, string trim_chars)
+{
+    std::string ret = str;
+    
+    for (int i = 0; i < (int)trim_chars.length(); i++) {
+        char ch = trim_chars.at(i);
+        
+        while (!ret.empty() && ret.at(ret.length() - 1) == ch) {
+            ret.erase(ret.end() - 1);
+            
+            // ok, matched, should reset the search
+            i = 0;
+        }
+    }
+    
+    return ret;
+}
+
+string srs_string_trim_start(string str, string trim_chars)
+{
+    std::string ret = str;
+    
+    for (int i = 0; i < (int)trim_chars.length(); i++) {
+        char ch = trim_chars.at(i);
+        
+        while (!ret.empty() && ret.at(0) == ch) {
+            ret.erase(ret.begin());
+            
+            // ok, matched, should reset the search
+            i = 0;
+        }
+    }
+    
+    return ret;
+}
+
+string srs_string_remove(string str, string remove_chars)
+{
+    std::string ret = str;
+    
+    for (int i = 0; i < (int)remove_chars.length(); i++) {
+        char ch = remove_chars.at(i);
+        
+        for (std::string::iterator it = ret.begin(); it != ret.end();) {
+            if (ch == *it) {
+                it = ret.erase(it);
+                
+                // ok, matched, should reset the search
+                i = 0;
+            } else {
+                ++it;
+            }
+        }
+    }
+    
+    return ret;
+}
+
+bool srs_string_ends_with(string str, string flag)
+{
+    return str.rfind(flag) == str.length() - flag.length();
+}

@@ -30,9 +30,32 @@ CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 
 
 #include <srs_core.hpp>
 #include <srs_core.hpp>
 
 
+#include <string>
+
+// compare
+#define srs_min(a, b) (((a) < (b))? (a) : (b))
+#define srs_max(a, b) (((a) < (b))? (b) : (a))
+
 // get current system time in ms, use cache to avoid performance problem
 // get current system time in ms, use cache to avoid performance problem
 extern int64_t srs_get_system_time_ms();
 extern int64_t srs_get_system_time_ms();
 // the deamon st-thread will update it.
 // the deamon st-thread will update it.
 extern void srs_update_system_time_ms();
 extern void srs_update_system_time_ms();
 
 
+// dns resolve utility, return the resolved ip address.
+extern std::string srs_dns_resolve(std::string host);
+
+// whether system is little endian
+extern bool srs_is_little_endian();
+
+// replace old_str to new_str of str
+extern std::string srs_string_replace(std::string str, std::string old_str, std::string new_str);
+// trim char in trim_chars of str
+extern std::string srs_string_trim_end(std::string str, std::string trim_chars);
+// trim char in trim_chars of str
+extern std::string srs_string_trim_start(std::string str, std::string trim_chars);
+// remove char in remove_chars of str
+extern std::string srs_string_remove(std::string str, std::string remove_chars);
+// whether string end with
+extern bool srs_string_ends_with(std::string str, std::string flag);
+
 #endif
 #endif

@@ -38,6 +38,7 @@ CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 #include <srs_app_config.hpp>
 #include <srs_app_config.hpp>
 #include <srs_app_log.hpp>
 #include <srs_app_log.hpp>
 #include <srs_app_server.hpp>
 #include <srs_app_server.hpp>
+#include <srs_kernel_utility.hpp>
 
 
 // kernel module.
 // kernel module.
 ISrsLog* _srs_log = new SrsFastLog();
 ISrsLog* _srs_log = new SrsFastLog();

@@ -39,6 +39,7 @@ CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 #include <srs_app_config.hpp>
 #include <srs_app_config.hpp>
 #include <srs_app_log.hpp>
 #include <srs_app_log.hpp>
 #include <srs_app_utility.hpp>
 #include <srs_app_utility.hpp>
+#include <srs_kernel_utility.hpp>
 
 
 // pre-declare
 // pre-declare
 int run();
 int run();

@@ -32,6 +32,7 @@ CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 #include <srs_protocol_rtmp_stack.hpp>
 #include <srs_protocol_rtmp_stack.hpp>
 #include <srs_protocol_utility.hpp>
 #include <srs_protocol_utility.hpp>
 #include <srs_kernel_stream.hpp>
 #include <srs_kernel_stream.hpp>
+#include <srs_kernel_utility.hpp>
 
 
 using namespace std;
 using namespace std;
 
 

@@ -30,6 +30,7 @@ CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 #include <srs_kernel_buffer.hpp>
 #include <srs_kernel_buffer.hpp>
 #include <srs_kernel_stream.hpp>
 #include <srs_kernel_stream.hpp>
 #include <srs_core_autofree.hpp>
 #include <srs_core_autofree.hpp>
+#include <srs_kernel_utility.hpp>
 
 
 using namespace std;
 using namespace std;
 
 

@@ -26,6 +26,7 @@ CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 #include <stdlib.h>
 #include <stdlib.h>
 
 
 #include <srs_kernel_log.hpp>
 #include <srs_kernel_log.hpp>
+#include <srs_kernel_utility.hpp>
 
 
 void srs_vhost_resolve(std::string& vhost, std::string& app)
 void srs_vhost_resolve(std::string& vhost, std::string& app)
 {
 {

@@ -29,6 +29,8 @@ CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */
 */
 #include <srs_core.hpp>
 #include <srs_core.hpp>
 
 
+#include <string>
+
 #define RTMP_DEFAULT_PORT "1935"
 #define RTMP_DEFAULT_PORT "1935"
 
 
 // the default chunk size for system.
 // the default chunk size for system.

@@ -23,6 +23,7 @@ CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 #include <srs_utest_buffer.hpp>
 #include <srs_utest_buffer.hpp>
 
 
 #include <srs_kernel_error.hpp>
 #include <srs_kernel_error.hpp>
+#include <srs_kernel_utility.hpp>
 
 
 MockBufferReader::MockBufferReader(const char* data)
 MockBufferReader::MockBufferReader(const char* data)
 {
 {