writing the http server service

mio/bin/t01.c

@@ -31,6 +31,7 @@
 #include <mio-pro.h>
 #include <mio-dns.h>
 #include <mio-nwif.h>
+#include <mio-http.h>
 
 #include <stdlib.h>
 #include <string.h>
@@ -944,8 +945,10 @@ for (i = 0; i < 5; i++)
 
 {
 	mio_svc_dnc_t* dnc;
+	mio_svc_htts_t* htts;
 	mio_ntime_t send_tmout, reply_tmout;
 	mio_skad_t servaddr;
+	mio_skad_t htts_bind_addr;
 
 	send_tmout.sec = 0;
 	send_tmout.nsec = 0;
@@ -955,7 +958,12 @@ for (i = 0; i < 5; i++)
 	mio_bcstrtoskad (mio, "8.8.8.8:53", &servaddr);
 	//mio_bcstrtoskad (mio, "[fe80::c7e2:bd6e:1209:ac1b]:1153", &servaddr);
 	//mio_bcstrtoskad (mio, "[fe80::c7e2:bd6e:1209:ac1b%eno1]:1153", &servaddr);
-	dnc = mio_svc_dnc_start (mio, &servaddr, MIO_NULL, &send_tmout, &reply_tmout, 2); /* option - send to all, send one by one */
+
+	//mio_bcstrtoskad (mio, "[::]:9988", &htts_bind_addr);
+	mio_bcstrtoskad (mio, "127.0.0.1:9988", &htts_bind_addr);
+
+	dnc = mio_svc_dnc_start(mio, &servaddr, MIO_NULL, &send_tmout, &reply_tmout, 2); /* option - send to all, send one by one */
+	htts = mio_svc_htts_start(mio, &htts_bind_addr);
 
 #if 1
 	{
@@ -1077,6 +1085,7 @@ if (!mio_svc_dnc_resolve(dnc, "google.com", MIO_DNS_RRT_SOA, MIO_SVC_DNC_RESOLVE
 	mio_loop (mio);
 
 	/* TODO: let mio close it ... dnc is svc. sck is dev. */
+	if (htts) mio_svc_htts_stop (htts);
 	mio_svc_dnc_stop (dnc);
 }
 

mio/lib/Makefile.am

@@ -54,6 +54,7 @@ libmio_la_SOURCES = \
 	htrd.c \
 	htre.c \
 	http.c \
+	http-svr.c \
 	mio-prv.h \
 	mio.c \
 	nwif.c \

mio/lib/Makefile.in

@@ -141,12 +141,12 @@ libmio_la_DEPENDENCIES = $(am__DEPENDENCIES_2) $(am__DEPENDENCIES_1) \
 am_libmio_la_OBJECTS = libmio_la-chr.lo libmio_la-dns.lo \
 	libmio_la-dns-cli.lo libmio_la-ecs.lo libmio_la-err.lo \
 	libmio_la-fmt.lo libmio_la-htb.lo libmio_la-htrd.lo \
-	libmio_la-htre.lo libmio_la-http.lo libmio_la-mio.lo \
+	libmio_la-htre.lo libmio_la-http.lo libmio_la-http-svr.lo \
-	libmio_la-nwif.lo libmio_la-path.lo libmio_la-pro.lo \
+	libmio_la-mio.lo libmio_la-nwif.lo libmio_la-path.lo \
-	libmio_la-sck.lo libmio_la-skad.lo libmio_la-sys.lo \
+	libmio_la-pro.lo libmio_la-sck.lo libmio_la-skad.lo \
-	libmio_la-sys-ass.lo libmio_la-sys-err.lo libmio_la-sys-log.lo \
+	libmio_la-sys.lo libmio_la-sys-ass.lo libmio_la-sys-err.lo \
-	libmio_la-sys-mux.lo libmio_la-sys-tim.lo libmio_la-tmr.lo \
+	libmio_la-sys-log.lo libmio_la-sys-mux.lo libmio_la-sys-tim.lo \
-	libmio_la-utf8.lo libmio_la-utl.lo
+	libmio_la-tmr.lo libmio_la-utf8.lo libmio_la-utl.lo
 libmio_la_OBJECTS = $(am_libmio_la_OBJECTS)
 AM_V_lt = $(am__v_lt_@AM_V@)
 am__v_lt_ = $(am__v_lt_@AM_DEFAULT_V@)
@@ -175,10 +175,12 @@ am__depfiles_remade = ./$(DEPDIR)/libmio_la-chr.Plo \
 	./$(DEPDIR)/libmio_la-dns.Plo ./$(DEPDIR)/libmio_la-ecs.Plo \
 	./$(DEPDIR)/libmio_la-err.Plo ./$(DEPDIR)/libmio_la-fmt.Plo \
 	./$(DEPDIR)/libmio_la-htb.Plo ./$(DEPDIR)/libmio_la-htrd.Plo \
-	./$(DEPDIR)/libmio_la-htre.Plo ./$(DEPDIR)/libmio_la-http.Plo \
+	./$(DEPDIR)/libmio_la-htre.Plo \
-	./$(DEPDIR)/libmio_la-mio.Plo ./$(DEPDIR)/libmio_la-nwif.Plo \
+	./$(DEPDIR)/libmio_la-http-svr.Plo \
-	./$(DEPDIR)/libmio_la-path.Plo ./$(DEPDIR)/libmio_la-pro.Plo \
+	./$(DEPDIR)/libmio_la-http.Plo ./$(DEPDIR)/libmio_la-mio.Plo \
-	./$(DEPDIR)/libmio_la-sck.Plo ./$(DEPDIR)/libmio_la-skad.Plo \
+	./$(DEPDIR)/libmio_la-nwif.Plo ./$(DEPDIR)/libmio_la-path.Plo \
+	./$(DEPDIR)/libmio_la-pro.Plo ./$(DEPDIR)/libmio_la-sck.Plo \
+	./$(DEPDIR)/libmio_la-skad.Plo \
 	./$(DEPDIR)/libmio_la-sys-ass.Plo \
 	./$(DEPDIR)/libmio_la-sys-err.Plo \
 	./$(DEPDIR)/libmio_la-sys-log.Plo \
@@ -375,6 +377,7 @@ pdfdir = @pdfdir@
 prefix = @prefix@
 program_transform_name = @program_transform_name@
 psdir = @psdir@
+runstatedir = @runstatedir@
 sbindir = @sbindir@
 sharedstatedir = @sharedstatedir@
 srcdir = @srcdir@
@@ -436,6 +439,7 @@ libmio_la_SOURCES = \
 	htrd.c \
 	htre.c \
 	http.c \
+	http-svr.c \
 	mio-prv.h \
 	mio.c \
 	nwif.c \
@@ -560,6 +564,7 @@ distclean-compile:
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libmio_la-htb.Plo@am__quote@ # am--include-marker
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libmio_la-htrd.Plo@am__quote@ # am--include-marker
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libmio_la-htre.Plo@am__quote@ # am--include-marker
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libmio_la-http-svr.Plo@am__quote@ # am--include-marker
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libmio_la-http.Plo@am__quote@ # am--include-marker
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libmio_la-mio.Plo@am__quote@ # am--include-marker
 @AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/libmio_la-nwif.Plo@am__quote@ # am--include-marker
@@ -677,6 +682,13 @@ libmio_la-http.lo: http.c
 @AMDEP_TRUE@@am__fastdepCC_FALSE@	DEPDIR=$(DEPDIR) $(CCDEPMODE) $(depcomp) @AMDEPBACKSLASH@
 @am__fastdepCC_FALSE@	$(AM_V_CC@am__nodep@)$(LIBTOOL) $(AM_V_lt) --tag=CC $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=compile $(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(libmio_la_CPPFLAGS) $(CPPFLAGS) $(AM_CFLAGS) $(CFLAGS) -c -o libmio_la-http.lo `test -f 'http.c' || echo '$(srcdir)/'`http.c
 
+libmio_la-http-svr.lo: http-svr.c
+@am__fastdepCC_TRUE@	$(AM_V_CC)$(LIBTOOL) $(AM_V_lt) --tag=CC $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=compile $(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(libmio_la_CPPFLAGS) $(CPPFLAGS) $(AM_CFLAGS) $(CFLAGS) -MT libmio_la-http-svr.lo -MD -MP -MF $(DEPDIR)/libmio_la-http-svr.Tpo -c -o libmio_la-http-svr.lo `test -f 'http-svr.c' || echo '$(srcdir)/'`http-svr.c
+@am__fastdepCC_TRUE@	$(AM_V_at)$(am__mv) $(DEPDIR)/libmio_la-http-svr.Tpo $(DEPDIR)/libmio_la-http-svr.Plo
+@AMDEP_TRUE@@am__fastdepCC_FALSE@	$(AM_V_CC)source='http-svr.c' object='libmio_la-http-svr.lo' libtool=yes @AMDEPBACKSLASH@
+@AMDEP_TRUE@@am__fastdepCC_FALSE@	DEPDIR=$(DEPDIR) $(CCDEPMODE) $(depcomp) @AMDEPBACKSLASH@
+@am__fastdepCC_FALSE@	$(AM_V_CC@am__nodep@)$(LIBTOOL) $(AM_V_lt) --tag=CC $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=compile $(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(libmio_la_CPPFLAGS) $(CPPFLAGS) $(AM_CFLAGS) $(CFLAGS) -c -o libmio_la-http-svr.lo `test -f 'http-svr.c' || echo '$(srcdir)/'`http-svr.c
+
 libmio_la-mio.lo: mio.c
 @am__fastdepCC_TRUE@	$(AM_V_CC)$(LIBTOOL) $(AM_V_lt) --tag=CC $(AM_LIBTOOLFLAGS) $(LIBTOOLFLAGS) --mode=compile $(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(libmio_la_CPPFLAGS) $(CPPFLAGS) $(AM_CFLAGS) $(CFLAGS) -MT libmio_la-mio.lo -MD -MP -MF $(DEPDIR)/libmio_la-mio.Tpo -c -o libmio_la-mio.lo `test -f 'mio.c' || echo '$(srcdir)/'`mio.c
 @am__fastdepCC_TRUE@	$(AM_V_at)$(am__mv) $(DEPDIR)/libmio_la-mio.Tpo $(DEPDIR)/libmio_la-mio.Plo
@@ -946,6 +958,7 @@ distclean: distclean-am
 	-rm -f ./$(DEPDIR)/libmio_la-htb.Plo
 	-rm -f ./$(DEPDIR)/libmio_la-htrd.Plo
 	-rm -f ./$(DEPDIR)/libmio_la-htre.Plo
+	-rm -f ./$(DEPDIR)/libmio_la-http-svr.Plo
 	-rm -f ./$(DEPDIR)/libmio_la-http.Plo
 	-rm -f ./$(DEPDIR)/libmio_la-mio.Plo
 	-rm -f ./$(DEPDIR)/libmio_la-nwif.Plo
@@ -1017,6 +1030,7 @@ maintainer-clean: maintainer-clean-am
 	-rm -f ./$(DEPDIR)/libmio_la-htb.Plo
 	-rm -f ./$(DEPDIR)/libmio_la-htrd.Plo
 	-rm -f ./$(DEPDIR)/libmio_la-htre.Plo
+	-rm -f ./$(DEPDIR)/libmio_la-http-svr.Plo
 	-rm -f ./$(DEPDIR)/libmio_la-http.Plo
 	-rm -f ./$(DEPDIR)/libmio_la-mio.Plo
 	-rm -f ./$(DEPDIR)/libmio_la-nwif.Plo

mio/lib/dns-cli.c

@@ -123,7 +123,7 @@ static mio_dns_msg_t* make_dns_msg (mio_svc_dnc_t* dnc, mio_dns_bhdr_t* bdns, mi
 	dnc_dns_msg_xtn_t* msgxtn;
 
 	msg = mio_dns_make_msg(dnc->mio, bdns, qr, qr_count, rr, rr_count, edns, MIO_SIZEOF(*msgxtn) + xtnsize);
-	if (!msg) return MIO_NULL;
+	if (MIO_UNLIKELY(!msg)) return MIO_NULL;
 
 	if (bdns->id < 0)
 	{
@@ -720,10 +720,10 @@ mio_svc_dnc_t* mio_svc_dnc_start (mio_t* mio, const mio_skad_t* serv_addr, const
 	dnc_sck_xtn_t* sckxtn;
 
 	dnc = (mio_svc_dnc_t*)mio_callocmem(mio, MIO_SIZEOF(*dnc));
-	if (!dnc) goto oops;
+	if (MIO_UNLIKELY(!dnc)) goto oops;
 
 	dnc->mio = mio;
-	dnc->stop = mio_svc_dnc_stop;
+	dnc->svc_stop = mio_svc_dnc_stop;
 	dnc->serv_addr = *serv_addr;
 	dnc->send_tmout = *send_tmout;
 	dnc->reply_tmout = *reply_tmout;

mio/lib/http-svr.c

@@ -0,0 +1,228 @@
+#include "mio-http.h"
+#include "mio-htrd.h"
+#include "mio-prv.h"
+
+struct mio_svc_htts_t
+{
+	MIO_SVC_HEADER;
+
+	mio_dev_sck_t* lsck;
+};
+
+struct mio_svc_httc_t
+{
+	MIO_SVC_HEADER;
+};
+
+struct sck_xtn_t
+{
+	mio_svc_htts_t* htts;
+	mio_htrd_t* htrd; /* used by clients only */
+};
+typedef struct sck_xtn_t sck_xtn_t;
+
+struct htrd_xtn_t
+{
+	mio_dev_sck_t* sck;
+};
+typedef struct htrd_xtn_t htrd_xtn_t;
+/* ------------------------------------------------------------------------ */
+
+static int client_on_read (mio_dev_sck_t* sck, const void* buf, mio_iolen_t len, const mio_skad_t* srcaddr)
+{
+	sck_xtn_t* sckxtn = mio_dev_sck_getxtn(sck);
+printf ("** HTTS - client read   %p  %d -> htts:%p\n", sck, (int)len, sckxtn->htts);
+	if (len <= 0)
+	{
+		mio_dev_sck_halt (sck);
+	}
+	else if (mio_htrd_feed(sckxtn->htrd, buf, len) <= -1)
+	{
+		mio_dev_sck_halt (sck);
+	}
+
+	return 0;
+}
+
+static int client_on_write (mio_dev_sck_t* sck, mio_iolen_t wrlen, void* wrctx, const mio_skad_t* dstaddr)
+{
+	return 0;
+}
+
+static int client_on_disconnect (mio_dev_sck_t* sck)
+{
+printf ("** HTTS - client disconnect  %p\n", sck);
+}
+
+/* ------------------------------------------------------------------------ */
+static int listener_on_read (mio_dev_sck_t* sck, const void* buf, mio_iolen_t len, const mio_skad_t* srcaddr)
+{
+	return 0;
+}
+
+static int listener_on_write (mio_dev_sck_t* sck, mio_iolen_t wrlen, void* wrctx, const mio_skad_t* dstaddr)
+{
+	return 0;
+}
+
+static void listener_on_connect (mio_dev_sck_t* sck)
+{
+	sck_xtn_t* sckxtn = mio_dev_sck_getxtn(sck); /* the contents came from the listening socket */
+
+	if (sck->state & MIO_DEV_SCK_ACCEPTED)
+	{
+		/* accepted a new client */
+		htrd_xtn_t* htrdxtn;
+
+		printf ("** HTTS(%p) - accepted... %p %d \n", sckxtn->htts, sck, sck->sck);
+
+		/* the accepted socket inherits various event callbacks. switch some of them to avoid sharing */
+		sck->on_read = client_on_read;
+		sck->on_write = client_on_write;
+		sck->on_disconnect = client_on_disconnect;
+
+		sckxtn->htrd = mio_htrd_open(sck->mio, MIO_SIZEOF(*htrdxtn));
+		if (MIO_UNLIKELY(!sckxtn->htrd)) 
+		{
+			MIO_INFO2 (sck->mio, "UNABLE TO OPEN HTTP READER FOR ACCEPTED SOCKET %p %d\n", sck, (int)sck->sck);
+			mio_dev_sck_halt (sck);
+		}
+		else
+		{
+			htrdxtn = mio_htrd_getxtn(sckxtn->htrd);
+			htrdxtn->sck = sck;
+		}
+	}
+	else if (sck->state & MIO_DEV_SCK_CONNECTED)
+	{
+		/* this will never be triggered as the listing socket never call mio_dev_sck_connect() */
+		printf ("** HTTS(%p) - connected... %p %d \n", sckxtn->htts, sck, sck->sck);
+	}
+
+	/* MIO_DEV_SCK_CONNECTED must not be seen here as this is only for the listener socket */
+}
+
+static void listener_on_disconnect (mio_dev_sck_t* sck)
+{
+	sck_xtn_t* sckxtn = mio_dev_sck_getxtn(sck);
+
+	switch (MIO_DEV_SCK_GET_PROGRESS(sck))
+	{
+		case MIO_DEV_SCK_CONNECTING:
+			MIO_INFO1 (sck->mio, "OUTGOING SESSION DISCONNECTED - FAILED TO CONNECT (%d) TO REMOTE SERVER\n", (int)sck->sck);
+			break;
+
+		case MIO_DEV_SCK_CONNECTING_SSL:
+			MIO_INFO1 (sck->mio, "OUTGOING SESSION DISCONNECTED - FAILED TO SSL-CONNECT (%d) TO REMOTE SERVER\n", (int)sck->sck);
+			break;
+
+		case MIO_DEV_SCK_LISTENING:
+			MIO_INFO1 (sck->mio, "SHUTTING DOWN THE SERVER SOCKET(%d)...\n", (int)sck->sck);
+			break;
+
+		case MIO_DEV_SCK_CONNECTED:
+			MIO_INFO1 (sck->mio, "OUTGOING CLIENT CONNECTION GOT TORN DOWN(%d).......\n", (int)sck->sck);
+			break;
+
+		case MIO_DEV_SCK_ACCEPTING_SSL:
+			MIO_INFO1 (sck->mio, "INCOMING SSL-ACCEPT GOT DISCONNECTED(%d) ....\n", (int)sck->sck);
+			break;
+
+		case MIO_DEV_SCK_ACCEPTED:
+			MIO_INFO1 (sck->mio, "INCOMING CLIENT BEING SERVED GOT DISCONNECTED(%d).......\n", (int)sck->sck);
+			break;
+
+		default:
+			MIO_INFO1 (sck->mio, "DISCONNECTED AFTER ALL(%d).......\n", (int)sck->sck);
+			break;
+	}
+
+	if (sckxtn->htrd)
+	{
+		mio_htrd_close (sckxtn->htrd);
+		sckxtn->htrd = 0;
+	}
+}
+
+
+/* ------------------------------------------------------------------------ */
+
+mio_svc_htts_t* mio_svc_htts_start (mio_t* mio, const mio_skad_t* bind_addr)
+{
+	mio_svc_htts_t* htts = MIO_NULL;
+	union
+	{
+		mio_dev_sck_make_t m;
+		mio_dev_sck_bind_t b;
+		mio_dev_sck_listen_t l;
+	} info;
+	sck_xtn_t* sckxtn;
+
+	htts = (mio_svc_htts_t*)mio_callocmem(mio, MIO_SIZEOF(*htts));
+	if (MIO_UNLIKELY(!htts)) goto oops;
+
+	htts->mio = mio;
+	htts->svc_stop = mio_svc_htts_stop;
+
+	MIO_MEMSET (&info, 0, MIO_SIZEOF(info));
+	switch (mio_skad_family(bind_addr))
+	{
+		case MIO_AF_INET:
+			info.m.type = MIO_DEV_SCK_TCP4;
+			break;
+
+		case MIO_AF_INET6:
+			info.m.type = MIO_DEV_SCK_TCP6;
+			break;
+
+		default:
+			mio_seterrnum (mio, MIO_EINVAL);
+			goto oops;
+	}
+
+	MIO_MEMSET (&info, 0, MIO_SIZEOF(info));
+	info.m.on_write = listener_on_write;
+	info.m.on_read = listener_on_read;
+	info.m.on_connect = listener_on_connect;
+	info.m.on_disconnect = listener_on_disconnect;
+	htts->lsck = mio_dev_sck_make(mio, MIO_SIZEOF(*sckxtn), &info.m);
+	if (!htts->lsck) goto oops;
+
+	sckxtn = (sck_xtn_t*)mio_dev_sck_getxtn(htts->lsck);
+	sckxtn->htts = htts;
+
+	MIO_MEMSET (&info, 0, MIO_SIZEOF(info));
+	info.b.localaddr = *bind_addr;
+	info.b.options = MIO_DEV_SCK_BIND_REUSEADDR | MIO_DEV_SCK_BIND_REUSEPORT;
+	MIO_INIT_NTIME (&info.b.accept_tmout, 5, 1);
+	if (mio_dev_sck_bind(htts->lsck, &info.b) <= -1) goto oops;
+
+	info.l.backlogs = 255;
+	if (mio_dev_sck_listen(htts->lsck, &info.l) <= -1) goto oops;
+
+printf ("** HTTS LISTENER SOCKET %p\n", htts->lsck);
+	MIO_SVCL_APPEND_SVC (&mio->actsvc, (mio_svc_t*)htts);
+	return htts;
+
+oops:
+	if (htts)
+	{
+		if (htts->lsck) mio_dev_sck_kill (htts->lsck);
+		mio_freemem (mio, htts);
+	}
+	return MIO_NULL;
+}
+
+void mio_svc_htts_stop (mio_svc_htts_t* htts)
+{
+	mio_t* mio = htts->mio;
+
+	if (htts->lsck) mio_dev_sck_kill (htts->lsck);
+	/*if (dnc->lsck) mio_dev_sck_kill (dnc->lsck);
+	while (dnc->pending_req) release_dns_msg (dnc, dnc->pending_req);*/
+
+	MIO_SVCL_UNLINK_SVC (htts);
+	mio_freemem (mio, htts);
+}
+
+

mio/lib/mio-http.h

@@ -26,6 +26,7 @@
 #define _MIO_HTTP_H_
 
 #include <mio-ecs.h>
+#include <mio-sck.h>
 
 /** \file
  * This file provides basic data types and functions for the http protocol.
@@ -153,6 +154,11 @@ enum mio_perenchttpstr_opt_t
 };
 typedef enum mio_perenchttpstr_opt_t mio_perenchttpstr_opt_t;
 
+
+/* -------------------------------------------------------------- */
+typedef struct mio_svc_htts_t mio_svc_htts_t;
+typedef struct mio_svc_httc_t mio_svc_httc_t;
+
 #if defined(__cplusplus)
 extern "C" {
 #endif
@@ -236,6 +242,19 @@ MIO_EXPORT mio_bch_t* mio_perenchttpstrdup (
 	mio_mmgr_t*        mmgr
 );
 
+/* ------------------------------------------------------------------------- */
+/* HTTP SERVER SERVICE                                                       */
+/* ------------------------------------------------------------------------- */
+
+MIO_EXPORT mio_svc_htts_t* mio_svc_htts_start (
+	mio_t*            mio,
+	const mio_skad_t* bind_addr
+);
+
+MIO_EXPORT void mio_svc_htts_stop (
+	mio_svc_htts_t* htts
+);
+
 #if defined(__cplusplus)
 }
 #endif

mio/lib/mio.c

@@ -184,10 +184,10 @@ void mio_fini (mio_t* mio)
 		mio_svc_t* svc;
 
 		svc = MIO_SVCL_FIRST_SVC(&mio->actsvc);
-		if (svc->stop) 
+		if (svc->svc_stop) 
 		{
 			/* the stop callback must unregister itself */
-			svc->stop (svc);
+			svc->svc_stop (svc);
 		}
 		else
 		{
@@ -670,8 +670,8 @@ mio_dev_t* mio_dev_make (mio_t* mio, mio_oow_t dev_size, mio_dev_mth_t* dev_mth,
 		return MIO_NULL;
 	}
 
-	dev = mio_callocmem(mio, dev_size);
+	dev = (mio_dev_t*)mio_callocmem(mio, dev_size);
-	if (!dev) return MIO_NULL;
+	if (MIO_UNLIKELY(!dev)) return MIO_NULL;
 
 	dev->mio = mio;
 	dev->dev_size = dev_size;
@@ -888,7 +888,7 @@ kill_device:
 		if (schedule_kill_zombie_job (dev) <= -1)
 		{
 			/* i have no choice but to free up the devide by force */
-			while (kill_and_free_device (dev, 1) <= -1)
+			while (kill_and_free_device(dev, 1) <= -1)
 			{
 				if (mio->stopreq  != MIO_STOPREQ_NONE) 
 				{

mio/lib/mio.h

@@ -426,7 +426,7 @@ typedef void (*mio_svc_stop_t) (mio_svc_t* svc);
 
 #define MIO_SVC_HEADER \
 	mio_t*          mio; \
-	mio_svc_stop_t  stop; \
+	mio_svc_stop_t  svc_stop; \
 	mio_svc_t*      svc_prev; \
 	mio_svc_t*      svc_next 
 

mio/lib/sck.c

@@ -1289,7 +1289,7 @@ accept_done:
 	 * extension area as big as that of the master sck device
 	 * is created in the client sck device */
 	clidev = (mio_dev_sck_t*)mio_dev_make(mio, rdev->dev_size, &dev_mth_clisck, rdev->dev_evcb, &clisck); 
-	if (!clidev) 
+	if (MIO_UNLIKELY(!clidev))
 	{
 		close (clisck);
 		return -1;
@@ -1347,6 +1347,10 @@ accept_done:
 	clidev->on_write = rdev->on_write;
 	clidev->on_read = rdev->on_read;
 
+	/* inherit the contents of the extension area */
+	MIO_ASSERT (mio, rdev->dev_size == clidev->dev_size);
+	MIO_MEMCPY (mio_dev_sck_getxtn(clidev), mio_dev_sck_getxtn(rdev), rdev->dev_size - MIO_SIZEOF(mio_dev_sck_t));
+
 	MIO_ASSERT (mio, clidev->tmrjob_index == MIO_TMRIDX_INVALID);
 
 	if (rdev->ssl_ctx)
@@ -1359,7 +1363,7 @@ accept_done:
 		clidev->ssl_ctx = rdev->ssl_ctx;
 
 		if (MIO_IS_POS_NTIME(&rdev->tmout) &&
-		    schedule_timer_job_after (clidev, &rdev->tmout, ssl_accept_timedout) <= -1)
+		    schedule_timer_job_after(clidev, &rdev->tmout, ssl_accept_timedout) <= -1)
 		{
 			/* TODO: call a warning/error callback */
 			/* timer job scheduling failed. halt the device */
@@ -1484,7 +1488,7 @@ static int dev_evcb_sck_ready_stateful (mio_dev_t* dev, int events)
 			}
 			else if (events & MIO_DEV_EVENT_IN)
 			{
-				return accept_incoming_connection (rdev);
+				return accept_incoming_connection(rdev);
 			}
 			else
 			{
@@ -1638,7 +1642,7 @@ mio_dev_sck_t* mio_dev_sck_make (mio_t* mio, mio_oow_t xtnsize, const mio_dev_sc
 	if (sck_type_map[info->type].extra_dev_cap & MIO_DEV_CAP_STREAM) /* can't use the IS_STATEFUL() macro yet */
 	{
 		rdev = (mio_dev_sck_t*)mio_dev_make(
-			mio, MIO_SIZEOF(mio_dev_sck_t) + xtnsize, 
+			mio, MIO_SIZEOF(mio_dev_sck_t) + xtnsize,
 			&dev_sck_methods_stateful, &dev_sck_event_callbacks_stateful, (void*)info);
 	}
 	else