enhanced stio_dev_sck_to support a stream operations

stio/lib/main.c

@@ -97,23 +97,23 @@ static void tcp_on_disconnect (stio_dev_tcp_t* tcp)
 {
 	if (tcp->state & STIO_DEV_TCP_CONNECTING)
 	{
-		printf ("TCP DISCONNECTED - FAILED TO CONNECT (%d) TO REMOTE SERVER\n", tcp->sck);
+		printf ("TCP DISCONNECTED - FAILED TO CONNECT (%d) TO REMOTE SERVER\n", (int)tcp->sck);
 	}
 	else if (tcp->state & STIO_DEV_TCP_LISTENING)
 	{
-		printf ("SHUTTING DOWN THE SERVER SOCKET(%d)...\n", tcp->sck);
+		printf ("SHUTTING DOWN THE SERVER SOCKET(%d)...\n", (int)tcp->sck);
 	}
 	else if (tcp->state & STIO_DEV_TCP_CONNECTED)
 	{
-		printf ("CLIENT ORIGINATING FROM HERE GOT DISCONNECTED(%d).......\n", tcp->sck);
+		printf ("CLIENT ORIGINATING FROM HERE GOT DISCONNECTED(%d).......\n", (int)tcp->sck);
 	}
 	else if (tcp->state & STIO_DEV_TCP_ACCEPTED)
 	{
-		printf ("CLIENT BEING SERVED GOT DISCONNECTED(%d).......\n", tcp->sck);
+		printf ("CLIENT BEING SERVED GOT DISCONNECTED(%d).......\n", (int)tcp->sck);
 	}
 	else
 	{
-		printf ("TCP DISCONNECTED - THIS MUST NOT HAPPEN (%d)\n", tcp->sck);
+		printf ("TCP DISCONNECTED - THIS MUST NOT HAPPEN (%d - %x)\n", (int)tcp->sck, (unsigned int)tcp->state);
 	}
 }
 static int tcp_on_connect (stio_dev_tcp_t* tcp)
@@ -143,8 +143,6 @@ printf ("SEDING TIMED OUT...........\n");
 }
 else
 {
-
-
 	ts = (tcp_server_t*)(tcp + 1);
 	printf (">>> SENT MESSAGE %d of length %ld\n", ts->tally, (long int)wrlen);
 
@@ -194,12 +192,23 @@ printf ("DISABLING READING..............................\n");
 
 /* ========================================================================= */
 
-static int sck_on_read (stio_dev_sck_t* dev, const void* buf, stio_len_t len, const stio_sckadr_t* srcadr)
+static int arp_sck_on_read (stio_dev_sck_t* dev, const void* data, stio_len_t dlen, const stio_adr_t* srcadr)
 {
+	stio_etharp_pkt_t* eap;
+
+	if (dlen < STIO_SIZEOF(*eap)) return 0; /* drop */
+
+	eap = (stio_etharp_pkt_t*)data;
+	printf ("ARP OPCODE: %d", ntohs(eap->arphdr.opcode));
+	printf (" SHA: %02X:%02X:%02X:%02X:%02X:%02X", eap->arppld.sha[0], eap->arppld.sha[1], eap->arppld.sha[2], eap->arppld.sha[3], eap->arppld.sha[4], eap->arppld.sha[5]);
+	printf (" SPA: %d.%d.%d.%d", eap->arppld.spa[0], eap->arppld.spa[1], eap->arppld.spa[2], eap->arppld.spa[3]);
+	printf (" THA: %02X:%02X:%02X:%02X:%02X:%02X", eap->arppld.tha[0], eap->arppld.tha[1], eap->arppld.tha[2], eap->arppld.tha[3], eap->arppld.tha[4], eap->arppld.tha[5]);
+	printf (" TPA: %d.%d.%d.%d", eap->arppld.tpa[0], eap->arppld.tpa[1], eap->arppld.tpa[2], eap->arppld.tpa[3]);
+	printf ("\n");
 	return 0;
 }
 
-static int sck_on_write (stio_dev_sck_t* dev, stio_len_t wrlen, void* wrctx)
+static int arp_sck_on_write (stio_dev_sck_t* dev, stio_len_t wrlen, void* wrctx)
 {
 	return 0;
 }
@@ -322,8 +331,8 @@ int main ()
 	memset (&sck_make, 0, STIO_SIZEOF(sck_make));
 	sck_make.type = STIO_DEV_SCK_ARP;
 	//sck_make.type = STIO_DEV_SCK_ARP_DGRAM;
-	sck_make.on_write = sck_on_write;
+	sck_make.on_write = arp_sck_on_write;
-	sck_make.on_read = sck_on_read;
+	sck_make.on_read = arp_sck_on_read;
 	sck = stio_dev_sck_make (stio, 0, &sck_make);
 	if (!sck)
 	{
@@ -341,16 +350,15 @@ int main ()
 	adr.ptr = &sll;
 	adr.len = sizeof(sll);
 	sll.sll_family = AF_PACKET;
-	//sll.sll_protocol = STIO_CONST_HTON16(0x0003); /* P_ALL */
+//	sll.sll_protocol = STIO_CONST_HTON16(STIO_ETHHDR_PROTO_ARP);
-	sll.sll_protocol = STIO_CONST_HTON16(STIO_ETHHDR_PROTO_ARP);
+//	sll.sll_hatype = STIO_CONST_HTON16(STIO_ARPHDR_HTYPE_ETH);
-	sll.sll_hatype = STIO_CONST_HTON16(STIO_ARPHDR_HTYPE_ETH);
 	sll.sll_halen = STIO_ETHADR_LEN;
 	memcpy (sll.sll_addr, "\xFF\xFF\xFF\xFF\xFF\xFF", sll.sll_halen);
 	sll.sll_ifindex = if_nametoindex ("enp0s25.3");
 
 	/* if unicast ... */
 	//sll.sll_pkttype = PACKET_OTHERHOST;
-	sll.sll_pkttype = PACKET_BROADCAST;
+//	sll.sll_pkttype = PACKET_BROADCAST;
 
 	memset (&etharp, 0, sizeof(etharp));
 

stio/lib/stio-arp.c

@@ -158,7 +158,6 @@ static int arp_on_read (stio_dev_t* dev, const void* data, stio_len_t len)
 {
 printf ("dATA received %d bytes\n", (int)len);
 	return 0;
-
 }
 
 static int arp_on_write (stio_dev_t* dev, stio_len_t wrlen, void* wrctx)

stio/lib/stio-arp.h

@@ -30,7 +30,6 @@
 #include <stio.h>
 #include <stio-sck.h>
 
-typedef struct stio_dev_arp_t stio_dev_arp_t;
 #define STIO_ETHHDR_PROTO_IP4 0x0800
 #define STIO_ETHHDR_PROTO_ARP 0x0806
 
@@ -80,8 +79,8 @@ struct stio_etharp_pkt_t
 	stio_etharp_t arppld;
 };
 typedef struct stio_etharp_pkt_t stio_etharp_pkt_t;
-#pragma pack(pop)
 
+#pragma pack(pop)
 
 #if 0
 typedef int (*stio_dev_arp_on_read_t) (stio_dev_arp_t* dev, stio_pkt_arp_t* pkt, stio_len_t len);

stio/lib/stio-prv.h

@@ -42,18 +42,12 @@
 #define STIO_ASSERT assert
 
 
-#define STIO_USE_TMRJOB_IDXPTR
-
 struct stio_tmrjob_t
 {
 	void*                  ctx;
 	stio_ntime_t           when;
 	stio_tmrjob_handler_t  handler;
-#if defined(STIO_USE_TMRJOB_IDXPTR)
 	stio_tmridx_t*         idxptr; /* pointer to the index holder */
-#else
-	stio_tmrjob_updater_t  updater;
-#endif
 };
 
 #define STIO_TMRIDX_INVALID ((stio_tmridx_t)-1)

stio/lib/stio-sck.c

@@ -111,40 +111,66 @@ int stio_getsckadrinfo (stio_t* stio, const stio_sckadr_t* addr, stio_scklen_t*
 
 
 /* ========================================================================= */
+
+#define IS_STATEFUL(sck) ((sck)->dev_capa & STIO_DEV_CAPA_STREAM)
+
 struct sck_type_map_t
 {
 	int domain;
 	int type;
 	int proto;
-} sck_type_map[] =
+	int extra_dev_capa;
-{
+	int sck_capa;
-	{ AF_INET,      SOCK_STREAM,      0 },
-	{ AF_INET6,     SOCK_STREAM,      0 },
-	{ AF_INET,      SOCK_DGRAM,       0 },
-	{ AF_INET6,     SOCK_DGRAM,       0 },
-
-	{ AF_PACKET,    SOCK_RAW,         STIO_CONST_HTON16(0x0806) },
-	{ AF_PACKET,    SOCK_DGRAM,       STIO_CONST_HTON16(0x0806) } 
 };
 
+static struct sck_type_map_t sck_type_map[] =
+{
+	{ AF_INET,    SOCK_STREAM,    0,                         STIO_DEV_CAPA_STREAM  | STIO_DEV_CAPA_OUT_QUEUED },
+	{ AF_INET6,   SOCK_STREAM,    0,                         STIO_DEV_CAPA_STREAM  | STIO_DEV_CAPA_OUT_QUEUED },
+	{ AF_INET,    SOCK_DGRAM,     0,                         0                                                },
+	{ AF_INET6,   SOCK_DGRAM,     0,                         0                                                },
+
+	{ AF_PACKET,  SOCK_RAW,       STIO_CONST_HTON16(0x0806), 0                                                },
+	{ AF_PACKET,  SOCK_DGRAM,     STIO_CONST_HTON16(0x0806), 0                                                } 
+};
+
+/* ======================================================================== */
+
+static void tmr_connect_handle (stio_t* stio, const stio_ntime_t* now, stio_tmrjob_t* job)
+{
+	stio_dev_sck_t* rdev = (stio_dev_sck_t*)job->ctx;
+
+	STIO_ASSERT (IS_STATEFUL(rdev));
+
+	if (rdev->state & STIO_DEV_SCK_CONNECTING)
+	{
+		/* the state check for STIO_DEV_TCP_CONNECTING is actually redundant
+		 * as it must not be fired  after it gets connected. the timer job 
+		 * doesn't need to be deleted when it gets connected for this check 
+		 * here. this libarary, however, deletes the job when it gets 
+		 * connected. */
+		stio_dev_sck_halt (rdev);
+	}
+}
+
+/* ======================================================================== */
+
 static int dev_sck_make (stio_dev_t* dev, void* ctx)
 {
 	stio_dev_sck_t* rdev = (stio_dev_sck_t*)dev;
 	stio_dev_sck_make_t* arg = (stio_dev_sck_make_t*)ctx;
 
-
+	STIO_ASSERT (arg->type >= 0 && arg->type < STIO_COUNTOF(sck_type_map));
-	if (arg->type < 0 && arg->type >= STIO_COUNTOF(sck_type_map))
-	{
-		dev->stio->errnum = STIO_EINVAL;
-		return -1;
-	}
 
 	rdev->sck = stio_openasyncsck (dev->stio, sck_type_map[arg->type].domain, sck_type_map[arg->type].type, sck_type_map[arg->type].proto);
 	if (rdev->sck == STIO_SCKHND_INVALID) goto oops;
 
-	rdev->dev_capa = STIO_DEV_CAPA_IN | STIO_DEV_CAPA_OUT;
+	rdev->dev_capa = STIO_DEV_CAPA_IN | STIO_DEV_CAPA_OUT | sck_type_map[arg->type].extra_dev_capa;
 	rdev->on_write = arg->on_write;
 	rdev->on_read = arg->on_read;
+	rdev->type = arg->type;
+
+	rdev->tmridx_connect = STIO_TMRIDX_INVALID;
 	return 0;
 
 oops:
@@ -156,9 +182,40 @@ oops:
 	return -1;
 }
 
+static int dev_sck_make_client (stio_dev_t* dev, void* ctx)
+{
+	stio_dev_sck_t* rdev = (stio_dev_sck_t*)dev;
+	stio_syshnd_t* sck = (stio_syshnd_t*)ctx;
+
+	rdev->sck = *sck;
+	if (stio_makesckasync (rdev->stio, rdev->sck) <= -1) return -1;
+
+	return 0;
+}
+
 static void dev_sck_kill (stio_dev_t* dev)
 {
 	stio_dev_sck_t* rdev = (stio_dev_sck_t*)dev;
+
+	if (IS_STATEFUL(rdev))
+	{
+		if (rdev->state & (STIO_DEV_SCK_ACCEPTED | STIO_DEV_SCK_CONNECTED | STIO_DEV_SCK_CONNECTING | STIO_DEV_SCK_LISTENING))
+		{
+			if (rdev->on_disconnect) rdev->on_disconnect (rdev);
+		}
+
+		if (rdev->tmridx_connect != STIO_TMRIDX_INVALID)
+		{
+			stio_deltmrjob (dev->stio, rdev->tmridx_connect);
+			STIO_ASSERT (rdev->tmridx_connect == STIO_TMRIDX_INVALID);
+		}
+	}
+	else
+	{
+		STIO_ASSERT (rdev->state == 0);
+		STIO_ASSERT (rdev->tmridx_connect == STIO_TMRIDX_INVALID);
+	}
+
 	if (rdev->sck != STIO_SCKHND_INVALID) 
 	{
 		stio_closeasyncsck (rdev->stio, rdev->sck);
@@ -172,11 +229,29 @@ static stio_syshnd_t dev_sck_getsyshnd (stio_dev_t* dev)
 	return (stio_syshnd_t)rdev->sck;
 }
 
-static int dev_sck_read (stio_dev_t* dev, void* buf, stio_len_t* len, stio_adr_t* srcadr)
+static int dev_sck_read_stateful (stio_dev_t* dev, void* buf, stio_len_t* len, stio_adr_t* srcadr)
+{
+	stio_dev_sck_t* tcp = (stio_dev_sck_t*)dev;
+	ssize_t x;
+
+	x = recv (tcp->sck, buf, *len, 0);
+	if (x == -1)
+	{
+		if (errno == EINPROGRESS || errno == EWOULDBLOCK) return 0;  /* no data available */
+		if (errno == EINTR) return 0;
+		tcp->stio->errnum = stio_syserrtoerrnum(errno);
+		return -1;
+	}
+
+	*len = x;
+	return 1;
+}
+
+static int dev_sck_read_stateless (stio_dev_t* dev, void* buf, stio_len_t* len, stio_adr_t* srcadr)
 {
 	stio_dev_sck_t* rdev = (stio_dev_sck_t*)dev;
 	stio_scklen_t srcadrlen;
-	int x;
+	ssize_t x;
 
 	srcadrlen = srcadr->len;
 	x = recvfrom (rdev->sck, buf, *len, 0, srcadr->ptr, &srcadrlen);
@@ -193,7 +268,44 @@ static int dev_sck_read (stio_dev_t* dev, void* buf, stio_len_t* len, stio_adr_t
 	return 1;
 }
 
-static int dev_sck_write (stio_dev_t* dev, const void* data, stio_len_t* len, const stio_adr_t* dstadr)
+
+static int dev_sck_write_stateful (stio_dev_t* dev, const void* data, stio_len_t* len, const stio_adr_t* dstadr)
+{
+	stio_dev_sck_t* rdev = (stio_dev_sck_t*)dev;
+	ssize_t x;
+	int flags = 0;
+
+	if (*len <= 0)
+	{
+		/* it's a writing finish indicator. close the writing end of
+		 * the socket, probably leaving it in the half-closed state */
+		if (shutdown (rdev->sck, SHUT_WR) == -1)
+		{
+			rdev->stio->errnum = stio_syserrtoerrnum(errno);
+			return -1;
+		}
+
+		return 1;
+	}
+
+	/* TODO: flags MSG_DONTROUTE, MSG_DONTWAIT, MSG_MORE, MSG_OOB, MSG_NOSIGNAL */
+#if defined(MSG_NOSIGNAL)
+	flags |= MSG_NOSIGNAL;
+#endif
+	x = send (rdev->sck, data, *len, flags);
+	if (x == -1) 
+	{
+		if (errno == EINPROGRESS || errno == EWOULDBLOCK) return 0;  /* no data can be written */
+		if (errno == EINTR) return 0;
+		rdev->stio->errnum = stio_syserrtoerrnum(errno);
+		return -1;
+	}
+
+	*len = x;
+	return 1;
+}
+
+static int dev_sck_write_stateless (stio_dev_t* dev, const void* data, stio_len_t* len, const stio_adr_t* dstadr)
 {
 	stio_dev_sck_t* rdev = (stio_dev_sck_t*)dev;
 	ssize_t x;
@@ -211,64 +323,427 @@ static int dev_sck_write (stio_dev_t* dev, const void* data, stio_len_t* len, co
 	return 1;
 }
 
-
 static int dev_sck_ioctl (stio_dev_t* dev, int cmd, void* arg)
 {
+	stio_dev_sck_t* rdev = (stio_dev_sck_t*)dev;
+
+	switch (cmd)
+	{
+		case STIO_DEV_SCK_BIND:
+		{
+			stio_dev_sck_bind_t* bnd = (stio_dev_sck_bind_t*)arg;
+			struct sockaddr* sa = (struct sockaddr*)&bnd->addr;
+			stio_scklen_t sl;
+			stio_sckfam_t fam;
+			int x;
+
+			if (stio_getsckadrinfo (dev->stio, &bnd->addr, &sl, &fam) <= -1) return -1;
+
+			/* the socket is already non-blocking */
+			x = bind (rdev->sck, sa, sl);
+			if (x == -1)
+			{
+				rdev->stio->errnum = stio_syserrtoerrnum(errno);
+				return -1;
+			}
+
 			return 0;
 		}
 
-static stio_dev_mth_t dev_mth_sck = 
+		case STIO_DEV_SCK_CONNECT:
+		{
+			stio_dev_sck_connect_t* conn = (stio_dev_sck_connect_t*)arg;
+			struct sockaddr* sa = (struct sockaddr*)&conn->addr;
+			stio_scklen_t sl;
+			int x;
+
+			if (!IS_STATEFUL(rdev)) 
+			{
+				dev->stio->errnum = STIO_ENOCAPA;
+				return -1;
+			}
+
+			if (sa->sa_family == AF_INET) sl = STIO_SIZEOF(struct sockaddr_in);
+			else if (sa->sa_family == AF_INET6) sl = STIO_SIZEOF(struct sockaddr_in6);
+			else 
+			{
+				dev->stio->errnum = STIO_EINVAL;
+				return -1;
+			}
+
+			/* the socket is already non-blocking */
+			x = connect (rdev->sck, sa, sl);
+			if (x == -1)
+			{
+				if (errno == EINPROGRESS || errno == EWOULDBLOCK)
+				{
+					if (stio_dev_watch ((stio_dev_t*)rdev, STIO_DEV_WATCH_UPDATE, STIO_DEV_EVENT_IN | STIO_DEV_EVENT_OUT) >= 0)
+					{
+						stio_tmrjob_t tmrjob;
+
+						if (!stio_isnegtime(&conn->tmout))
+						{
+							STIO_MEMSET (&tmrjob, 0, STIO_SIZEOF(tmrjob));
+							tmrjob.ctx = rdev;
+							stio_gettime (&tmrjob.when);
+							stio_addtime (&tmrjob.when, &conn->tmout, &tmrjob.when);
+							tmrjob.handler = tmr_connect_handle;
+							tmrjob.idxptr = &rdev->tmridx_connect;
+
+							STIO_ASSERT (rdev->tmridx_connect == STIO_TMRIDX_INVALID);
+							rdev->tmridx_connect = stio_instmrjob (rdev->stio, &tmrjob);
+							if (rdev->tmridx_connect == STIO_TMRIDX_INVALID)
+							{
+								stio_dev_watch ((stio_dev_t*)rdev, STIO_DEV_WATCH_UPDATE, STIO_DEV_EVENT_IN);
+								/* event manipulation failure can't be handled properly. so ignore it. 
+								 * anyway, it's already in a failure condition */
+								return -1;
+							}
+						}
+
+						rdev->state |= STIO_DEV_SCK_CONNECTING;
+						rdev->peer = conn->addr;
+						rdev->on_connect = conn->on_connect;
+						rdev->on_disconnect = conn->on_disconnect;
+						return 0;
+					}
+				}
+
+				rdev->stio->errnum = stio_syserrtoerrnum(errno);
+				return -1;
+			}
+
+			/* connected immediately */
+			rdev->state |= STIO_DEV_SCK_CONNECTED;
+			rdev->peer = conn->addr;
+			rdev->on_connect = conn->on_connect;
+			rdev->on_disconnect = conn->on_disconnect;
+			return 0;
+		}
+
+		case STIO_DEV_SCK_LISTEN:
+		{
+			stio_dev_sck_listen_t* lstn = (stio_dev_sck_listen_t*)arg;
+			int x;
+
+			if (!IS_STATEFUL(rdev)) 
+			{
+				dev->stio->errnum = STIO_ENOCAPA;
+				return -1;
+			}
+
+			x = listen (rdev->sck, lstn->backlogs);
+			if (x == -1) 
+			{
+				rdev->stio->errnum = stio_syserrtoerrnum(errno);
+				return -1;
+			}
+
+			rdev->state |= STIO_DEV_SCK_LISTENING;
+			rdev->on_connect = lstn->on_connect;
+			rdev->on_disconnect = lstn->on_disconnect;
+			return 0;
+		}
+	}
+
+	return 0;
+}
+
+static stio_dev_mth_t dev_mth_sck_stateless = 
 {
 	dev_sck_make,
 	dev_sck_kill,
 	dev_sck_getsyshnd,
 
-	dev_sck_read,
+	dev_sck_read_stateless,
-	dev_sck_write,
+	dev_sck_write_stateless,
 	dev_sck_ioctl,     /* ioctl */
 };
 
 
+static stio_dev_mth_t dev_mth_sck_stateful = 
+{
+	dev_sck_make,
+	dev_sck_kill,
+	dev_sck_getsyshnd,
+
+	dev_sck_read_stateful,
+	dev_sck_write_stateful,
+	dev_sck_ioctl,     /* ioctl */
+};
+
+
+static stio_dev_mth_t dev_mth_clisck =
+{
+	dev_sck_make_client,
+	dev_sck_kill,
+	dev_sck_getsyshnd,
+
+	dev_sck_read_stateful,
+	dev_sck_write_stateful,
+	dev_sck_ioctl
+};
 /* ========================================================================= */
 
-static int dev_evcb_sck_ready (stio_dev_t* dev, int events)
+static int dev_evcb_sck_ready_stateful (stio_dev_t* dev, int events)
 {
-/* TODO: ... */
+	stio_dev_sck_t* rdev = (stio_dev_sck_t*)dev;
-	if (events & STIO_DEV_EVENT_ERR) printf ("SCK READY ERROR.....\n");
-	if (events & STIO_DEV_EVENT_HUP) printf ("SCK READY HANGUP.....\n");
-	if (events & STIO_DEV_EVENT_PRI) printf ("SCK READY PRI.....\n");
-	if (events & STIO_DEV_EVENT_IN) printf ("SCK READY IN.....\n");
-	if (events & STIO_DEV_EVENT_OUT) printf ("SCK READY OUT.....\n");
 
+	if (events & STIO_DEV_EVENT_ERR)
+	{
+		int errcode;
+		stio_scklen_t len;
+
+		len = STIO_SIZEOF(errcode);
+		if (getsockopt (rdev->sck, SOL_SOCKET, SO_ERROR, (char*)&errcode, &len) == -1)
+		{
+			/* the error number is set to the socket error code.
+			 * errno resulting from getsockopt() doesn't reflect the actual
+			 * socket error. so errno is not used to set the error number.
+			 * instead, the generic device error STIO_EDEVERRR is used */
+			rdev->stio->errnum = STIO_EDEVERR;
+		}
+		else
+		{
+			rdev->stio->errnum = stio_syserrtoerrnum (errcode);
+		}
+		return -1;
+	}
+
+	/* this socket can connect */
+	if (rdev->state & STIO_DEV_SCK_CONNECTING)
+	{
+		if (events & STIO_DEV_EVENT_HUP)
+		{
+			/* device hang-up */
+			rdev->stio->errnum = STIO_EDEVHUP;
+			return -1;
+		}
+		else if (events & (STIO_DEV_EVENT_PRI | STIO_DEV_EVENT_IN))
+		{
+			/* invalid event masks. generic device error */
+			rdev->stio->errnum = STIO_EDEVERR;
+			return -1;
+		}
+		else if (events & STIO_DEV_EVENT_OUT)
+		{
+			int errcode;
+			stio_scklen_t len;
+
+			STIO_ASSERT (!(rdev->state & STIO_DEV_SCK_CONNECTED));
+
+			len = STIO_SIZEOF(errcode);
+			if (getsockopt (rdev->sck, SOL_SOCKET, SO_ERROR, (char*)&errcode, &len) == -1)
+			{
+				rdev->stio->errnum = stio_syserrtoerrnum(errno);
+				return -1;
+			}
+			else if (errcode == 0)
+			{
+				rdev->state &= ~STIO_DEV_SCK_CONNECTING;
+				rdev->state |= STIO_DEV_SCK_CONNECTED;
+
+				if (stio_dev_watch ((stio_dev_t*)rdev, STIO_DEV_WATCH_RENEW, 0) <= -1) return -1;
+
+				if (rdev->tmridx_connect != STIO_TMRIDX_INVALID)
+				{
+					stio_deltmrjob (rdev->stio, rdev->tmridx_connect);
+					STIO_ASSERT (rdev->tmridx_connect == STIO_TMRIDX_INVALID);
+				}
+
+				if (rdev->on_connect (rdev) <= -1) 
+				{
+					printf ("ON_CONNECTE HANDLER RETURNEF FAILURE...\n");
+					return -1;
+				}
+			}
+			else if (errcode == EINPROGRESS || errcode == EWOULDBLOCK)
+			{
+				/* still in progress */
+			}
+			else
+			{
+				rdev->stio->errnum = stio_syserrtoerrnum(errcode);
+				return -1;
+			}
+		}
+
+		return 0; /* success but don't invoke on_read() */ 
+	}
+	else if (rdev->state & STIO_DEV_SCK_LISTENING)
+	{
+		if (events & STIO_DEV_EVENT_HUP)
+		{
+			/* device hang-up */
+			rdev->stio->errnum = STIO_EDEVHUP;
+			return -1;
+		}
+		else if (events & (STIO_DEV_EVENT_PRI | STIO_DEV_EVENT_OUT))
+		{
+			rdev->stio->errnum = STIO_EDEVERR;
+			return -1;
+		}
+		else if (events & STIO_DEV_EVENT_IN)
+		{
+			stio_sckhnd_t clisck;
+			stio_sckadr_t peer;
+			stio_scklen_t addrlen;
+			stio_dev_sck_t* clidev;
+
+			/* this is a server(lisening) socket */
+
+			addrlen = STIO_SIZEOF(peer);
+			clisck = accept (rdev->sck, (struct sockaddr*)&peer, &addrlen);
+			if (clisck == STIO_SCKHND_INVALID)
+			{
+				if (errno == EINPROGRESS || errno == EWOULDBLOCK) return 0;
+				if (errno == EINTR) return 0; /* if interrupted by a signal, treat it as if it's EINPROGRESS */
+
+				rdev->stio->errnum = stio_syserrtoerrnum(errno);
+				return -1;
+			}
+
+			/* use rdev->dev_size when instantiating a client sck device
+			 * instead of STIO_SIZEOF(stio_dev_sck_t). therefore, the 
+			 * extension area as big as that of the master sck device
+			 * is created in the client sck device */
+			clidev = (stio_dev_sck_t*)stio_makedev (rdev->stio, rdev->dev_size, &dev_mth_clisck, rdev->dev_evcb, &clisck); 
+			if (!clidev) 
+			{
+				close (clisck);
+				return -1;
+			}
+
+			clidev->dev_capa |= STIO_DEV_CAPA_IN | STIO_DEV_CAPA_OUT | STIO_DEV_CAPA_STREAM;
+			clidev->state |= STIO_DEV_SCK_ACCEPTED;
+			clidev->peer = peer;
+			/*clidev->parent = sck;*/
+
+			/* inherit some event handlers from the parent.
+			 * you can still change them inside the on_connect handler */
+			clidev->on_connect = rdev->on_connect;
+			clidev->on_disconnect = rdev->on_disconnect; 
+			clidev->on_write = rdev->on_write;
+			clidev->on_read = rdev->on_read;
+
+			clidev->tmridx_connect = STIO_TMRIDX_INVALID;
+			if (clidev->on_connect(clidev) <= -1) stio_dev_sck_halt (clidev);
+
+			return 0; /* success but don't invoke on_read() */ 
+		}
+	}
+	else if (events & STIO_DEV_EVENT_HUP)
+	{
+		if (events & (STIO_DEV_EVENT_PRI | STIO_DEV_EVENT_IN | STIO_DEV_EVENT_OUT)) 
+		{
+			/* probably half-open? */
+			return 1;
+		}
+
+		rdev->stio->errnum = STIO_EDEVHUP;
+		return -1;
+	}
+
+	return 1; /* the device is ok. carry on reading or writing */
+}
+
+static int dev_evcb_sck_ready_stateless (stio_dev_t* dev, int events)
+{
+	stio_dev_sck_t* rdev = (stio_dev_sck_t*)dev;
+
+	if (events & STIO_DEV_EVENT_ERR)
+	{
+		int errcode;
+		stio_scklen_t len;
+
+		len = STIO_SIZEOF(errcode);
+		if (getsockopt (rdev->sck, SOL_SOCKET, SO_ERROR, (char*)&errcode, &len) == -1)
+		{
+			/* the error number is set to the socket error code.
+			 * errno resulting from getsockopt() doesn't reflect the actual
+			 * socket error. so errno is not used to set the error number.
+			 * instead, the generic device error STIO_EDEVERRR is used */
+			rdev->stio->errnum = STIO_EDEVERR;
+		}
+		else
+		{
+			rdev->stio->errnum = stio_syserrtoerrnum (errcode);
+		}
+		return -1;
+	}
+	else if (events & STIO_DEV_EVENT_HUP)
+	{
+		rdev->stio->errnum = STIO_EDEVHUP;
+		return -1;
+	}
 
 	return 1; /* the device is ok. carry on reading or writing */
 }
 
 static int dev_evcb_sck_on_read (stio_dev_t* dev, const void* data, stio_len_t dlen, const stio_adr_t* adr)
 {
-printf ("dATA received %d bytes\n", (int)dlen);
+	stio_dev_sck_t* rdev = (stio_dev_sck_t*)dev;
-	return 0;
+	return rdev->on_read (rdev, data, dlen, adr);
-
 }
 
 static int dev_evcb_sck_on_write (stio_dev_t* dev, stio_len_t wrlen, void* wrctx, const stio_adr_t* adr)
 {
-	return 0;
+	stio_dev_sck_t* rdev = (stio_dev_sck_t*)dev;
-
+	return rdev->on_write (rdev, wrlen, wrctx);
 }
 
-static stio_dev_evcb_t dev_evcb_sck =
+static stio_dev_evcb_t dev_evcb_sck_stateful =
 {
-	dev_evcb_sck_ready,
+	dev_evcb_sck_ready_stateful,
 	dev_evcb_sck_on_read,
 	dev_evcb_sck_on_write
 };
 
-/* ======================================================================== */
+static stio_dev_evcb_t dev_evcb_sck_stateless =
-
-stio_dev_sck_t* stio_dev_sck_make (stio_t* stio, stio_size_t xtnsize, const stio_dev_sck_make_t* data)
 {
-	return (stio_dev_sck_t*)stio_makedev (stio, STIO_SIZEOF(stio_dev_sck_t) + xtnsize, &dev_mth_sck, &dev_evcb_sck, (void*)data);
+	dev_evcb_sck_ready_stateless,
+	dev_evcb_sck_on_read,
+	dev_evcb_sck_on_write
+};
+
+/* ========================================================================= */
+
+stio_dev_sck_t* stio_dev_sck_make (stio_t* stio, stio_size_t xtnsize, const stio_dev_sck_make_t* mkinf)
+{
+	stio_dev_sck_t* rdev;
+
+
+	if (mkinf->type < 0 && mkinf->type >= STIO_COUNTOF(sck_type_map))
+	{
+		stio->errnum = STIO_EINVAL;
+		return STIO_NULL;
+	}
+
+	if (sck_type_map[mkinf->type].extra_dev_capa & STIO_DEV_CAPA_STREAM) /* can't use the IS_STATEFUL() macro yet */
+	{
+		rdev = (stio_dev_sck_t*)stio_makedev (stio, STIO_SIZEOF(stio_dev_sck_t) + xtnsize, &dev_mth_sck_stateful, &dev_evcb_sck_stateful, (void*)mkinf);
+	}
+	else
+	{
+		rdev = (stio_dev_sck_t*)stio_makedev (stio, STIO_SIZEOF(stio_dev_sck_t) + xtnsize, &dev_mth_sck_stateless, &dev_evcb_sck_stateless, (void*)mkinf);
+	}
+
+	return rdev;
+}
+
+int stio_dev_sck_bind (stio_dev_sck_t* dev, stio_dev_sck_bind_t* info)
+{
+	return stio_dev_ioctl ((stio_dev_t*)dev, STIO_DEV_SCK_BIND, info);
+}
+
+int stio_dev_sck_connect (stio_dev_sck_t* dev, stio_dev_sck_connect_t* info)
+{
+	return stio_dev_ioctl ((stio_dev_t*)dev, STIO_DEV_SCK_CONNECT, info);
+}
+
+int stio_dev_sck_listen (stio_dev_sck_t* dev, stio_dev_sck_listen_t* info)
+{
+	return stio_dev_ioctl ((stio_dev_t*)dev, STIO_DEV_SCK_LISTEN, info);
 }
 
 int stio_dev_sck_write (stio_dev_sck_t* dev, const void* data, stio_len_t dlen, void* wrctx, const stio_adr_t* dstadr)

stio/lib/stio-sck.h

@@ -80,11 +80,40 @@ typedef int stio_sckfam_t;
 
 /* ========================================================================= */
 
+enum stio_dev_sck_ioctl_cmd_t
+{
+	STIO_DEV_SCK_BIND, 
+	STIO_DEV_SCK_CONNECT,
+	STIO_DEV_SCK_LISTEN
+};
+typedef enum stio_dev_sck_ioctl_cmd_t stio_dev_sck_ioctl_cmd_t;
+
+
+enum stio_dev_sck_state_t
+{
+	STIO_DEV_SCK_CONNECTING = (1 << 0),
+	STIO_DEV_SCK_CONNECTED  = (1 << 1),
+	STIO_DEV_SCK_LISTENING  = (1 << 2),
+	STIO_DEV_SCK_ACCEPTED   = (1 << 3)
+};
+typedef enum stio_dev_sck_state_t stio_dev_sck_state_t;
 
 typedef struct stio_dev_sck_t stio_dev_sck_t;
 
-typedef int (*stio_dev_sck_on_read_t) (stio_dev_sck_t* dev, const void* data, stio_len_t dlen, const stio_sckadr_t* srcadr);
+typedef int (*stio_dev_sck_on_read_t) (
-typedef int (*stio_dev_sck_on_write_t) (stio_dev_sck_t* dev, stio_len_t wrlen, void* wrctx);
+	stio_dev_sck_t*   dev,
+	const void*       data,
+	stio_len_t        dlen,
+	const stio_adr_t* srcadr
+);
+typedef int (*stio_dev_sck_on_write_t) (
+	stio_dev_sck_t*   dev,
+	stio_len_t        wrlen,
+	void*             wrctx
+);
+
+typedef int (*stio_dev_sck_on_connect_t) (stio_dev_sck_t* dev);
+typedef void (*stio_dev_sck_on_disconnect_t) (stio_dev_sck_t* dev);
 
 enum stio_dev_sck_type_t
 {
@@ -106,20 +135,64 @@ struct stio_dev_sck_make_t
 	stio_dev_sck_on_read_t on_read;
 };
 
+typedef struct stio_dev_sck_bind_t stio_dev_sck_bind_t;
+struct stio_dev_sck_bind_t
+{
+	int opts; /* TODO: REUSEADDR , TRANSPARENT, etc  or someting?? */
+	stio_sckadr_t addr;
+	/* TODO: add device name for BIND_TO_DEVICE */
+};
+
+typedef struct stio_dev_sck_connect_t stio_dev_sck_connect_t;
+struct stio_dev_sck_connect_t
+{
+	stio_sckadr_t addr;
+	stio_ntime_t tmout; /* connect timeout */
+	stio_dev_sck_on_connect_t on_connect;
+	stio_dev_sck_on_disconnect_t on_disconnect;
+};
+
+typedef struct stio_dev_sck_listen_t stio_dev_sck_listen_t;
+struct stio_dev_sck_listen_t
+{
+	int backlogs;
+	stio_dev_sck_on_connect_t on_connect; /* optional, but new connections are dropped immediately without this */
+	stio_dev_sck_on_disconnect_t on_disconnect; /* should on_discconneted be part of on_accept_t??? */
+};
+
+typedef struct stio_dev_sck_accept_t stio_dev_sck_accept_t;
+struct stio_dev_sck_accept_t
+{
+	stio_syshnd_t   sck;
+/* TODO: add timeout */
+	stio_sckadr_t   peer;
+};
+
+
+
 struct stio_dev_sck_t
 {
 	STIO_DEV_HEADERS;
+	stio_dev_sck_type_t type;
 	stio_sckhnd_t sck;
+
 	stio_dev_sck_on_write_t on_write;
 	stio_dev_sck_on_read_t on_read;
-};
 
+	int state;
+	/** return 0 on succes, -1 on failure/
+	 *  called on a new tcp device for an accepted client or
+	 *         on a tcp device conntected to a remote server */
+	stio_dev_sck_on_connect_t on_connect;
+	stio_dev_sck_on_disconnect_t on_disconnect;
+	stio_tmridx_t tmridx_connect;
+	stio_sckadr_t peer;
+};
 
 #ifdef __cplusplus
 extern "C" {
 #endif
 
-
 STIO_EXPORT stio_sckhnd_t stio_openasyncsck (
 	stio_t* stio,
 	int     domain, 
@@ -149,7 +222,22 @@ STIO_EXPORT int stio_getsckadrinfo (
 STIO_EXPORT stio_dev_sck_t* stio_dev_sck_make (
 	stio_t*                    stio,
 	stio_size_t                xtnsize,
-	const stio_dev_sck_make_t* data
+	const stio_dev_sck_make_t* info
+);
+
+STIO_EXPORT int stio_dev_sck_bind (
+	stio_dev_sck_t*         dev,
+	stio_dev_sck_bind_t*    info
+);
+
+STIO_EXPORT int stio_dev_sck_connect (
+	stio_dev_sck_t*         dev,
+	stio_dev_sck_connect_t* info
+);
+
+STIO_EXPORT int stio_dev_sck_listen (
+	stio_dev_sck_t*         dev,
+	stio_dev_sck_listen_t*  info
 );
 
 STIO_EXPORT int stio_dev_sck_write (
@@ -169,6 +257,45 @@ STIO_EXPORT int stio_dev_sck_timedwrite (
 	const stio_adr_t*     dstadr
 );
 
+#if defined(STIO_HAVE_INLINE)
+
+static STIO_INLINE void stio_dev_sck_halt (stio_dev_sck_t* sck)
+{
+	stio_dev_halt ((stio_dev_t*)sck);
+
+}
+
+static STIO_INLINE int stio_dev_sck_read (stio_dev_sck_t* sck, int enabled)
+{
+	return stio_dev_read ((stio_dev_t*)sck, enabled);
+}
+
+/*
+static STIO_INLINE int stio_dev_sck_write (stio_dev_sck_t* sck, const void* data, stio_len_t len, void* wrctx, const stio_adr_t* dstadr)
+{
+	return stio_dev_write ((stio_dev_t*)sck, data, len, wrctx, STIO_NULL);
+}
+
+static STIO_INLINE int stio_dev_sck_timedwrite (stio_dev_sck_t* sck, const void* data, stio_len_t len, const stio_ntime_t* tmout, void* wrctx)
+{
+	return stio_dev_timedwrite ((stio_dev_t*)sck, data, len, tmout, wrctx, STIO_NULL);
+}
+*/
+
+
+#else
+
+#define stio_dev_sck_halt(sck) stio_dev_halt((stio_dev_t*)sck)
+#define stio_dev_sck_read(sck,enabled) stio_dev_read((stio_dev_t*)sck, enabled)
+/*
+#define stio_dev_sck_write(sck,data,len,wrctx) stio_dev_write((stio_dev_t*)sck, data, len, wrctx, STIO_NULL)
+#define stio_dev_sck_timedwrite(sck,data,len,tmout,wrctx) stio_dev_timedwrite((stio_dev_t*)sck, data, len, tmout, wrctx, STIO_NULL)
+*/
+
+
+
+#endif
+
 
 #ifdef __cplusplus
 }

stio/lib/stio-tcp.c

@@ -182,17 +182,6 @@ static void tmr_connect_handle (stio_t* stio, const stio_ntime_t* now, stio_tmrj
 	}
 }
 
-#if defined(STIO_USE_TMRJOB_IDXPTR)
-/* nothing to define */
-#else
-static void tmr_connect_update (stio_t* stio, stio_tmridx_t old_index, stio_tmridx_t new_index, stio_tmrjob_t* job)
-{
-	stio_dev_tcp_t* tcp = (stio_dev_tcp_t*)job->ctx;
-	tcp->tmridx_connect = new_index;
-}
-#endif
-
-
 static int tcp_ioctl (stio_dev_t* dev, int cmd, void* arg)
 {
 	stio_dev_tcp_t* tcp = (stio_dev_tcp_t*)dev;
@@ -261,11 +250,7 @@ static int tcp_ioctl (stio_dev_t* dev, int cmd, void* arg)
 							stio_gettime (&tmrjob.when);
 							stio_addtime (&tmrjob.when, &conn->tmout, &tmrjob.when);
 							tmrjob.handler = tmr_connect_handle;
-						#if defined(STIO_USE_TMRJOB_IDXPTR)
 							tmrjob.idxptr = &tcp->tmridx_connect;
-						#else
-							tmrjob.updater = tmr_connect_update;
-						#endif
 
 							STIO_ASSERT (tcp->tmridx_connect == STIO_TMRIDX_INVALID);
 							tcp->tmridx_connect = stio_instmrjob (tcp->stio, &tmrjob);

stio/lib/stio-tcp.h

@@ -50,7 +50,6 @@ typedef enum stio_dev_tcp_state_t stio_dev_tcp_state_t;
 typedef struct stio_dev_tcp_t stio_dev_tcp_t;
 
 typedef int (*stio_dev_tcp_on_connect_t) (stio_dev_tcp_t* dev);
-typedef void (*stio_dev_tcp_on_accepted_t) (stio_dev_tcp_t* dev, stio_dev_tcp_t* clidev);
 typedef void (*stio_dev_tcp_on_disconnect_t) (stio_dev_tcp_t* dev);
 
 typedef int (*stio_dev_tcp_on_read_t) (stio_dev_tcp_t* dev, const void* data, stio_len_t len);

stio/lib/stio-tmr.c

@@ -46,28 +46,14 @@ static stio_tmridx_t sift_up (stio_t* stio, stio_tmridx_t index, int notify)
 	if (index > 0 && YOUNGER_THAN(&stio->tmr.jobs[index], &stio->tmr.jobs[parent]))
 	{
 		stio_tmrjob_t item;
-#if defined(STIO_USE_TMRJOB_IDXPTR)
-		/* nothing */
-#else
-		stio_tmridx_t old_index;
-#endif
 
 		item = stio->tmr.jobs[index]; 
-#if defined(STIO_USE_TMRJOB_IDXPTR)
-		/* nothing */
-#else
-		old_index = index;
-#endif
 
 		do
 		{
 			/* move down the parent to my current position */
 			stio->tmr.jobs[index] = stio->tmr.jobs[parent];
-#if defined(STIO_USE_TMRJOB_IDXPTR)
 			if (stio->tmr.jobs[index].idxptr) *stio->tmr.jobs[index].idxptr = index;
-#else
-			stio->tmr.jobs[index].updater (stio, parent, index, &stio->tmr.jobs[index]);
-#endif
 
 			/* traverse up */
 			index = parent;
@@ -76,15 +62,7 @@ static stio_tmridx_t sift_up (stio_t* stio, stio_tmridx_t index, int notify)
 		while (index > 0 && YOUNGER_THAN(&item, &stio->tmr.jobs[parent]));
 
 		stio->tmr.jobs[index] = item;
-#if defined(STIO_USE_TMRJOB_IDXPTR)
 		if (stio->tmr.jobs[index].idxptr) *stio->tmr.jobs[index].idxptr = index;
-#else
-		/* we send no notification if the item is added with stio_instmrjob()
-		 * or updated with stio_updtmrjob(). the caller of these functions
-		 * must rely on the return value. */
-		if (notify && index != old_index)
-			stio->tmr.jobs[index].updater (stio, old_index, index, &stio->tmr.jobs[index]);
-#endif
 	}
 
 	return index;
@@ -97,20 +75,9 @@ static stio_tmridx_t sift_down (stio_t* stio, stio_tmridx_t index, int notify)
 	if (index < base) /* at least 1 child is under the 'index' position */
 	{
 		stio_tmrjob_t item;
-#if defined(STIO_USE_TMRJOB_IDXPTR)
-		/* nothing */
-#else
-		stio_tmridx_t old_index;
-#endif
 
 		item = stio->tmr.jobs[index];
 
-#if defined(STIO_USE_TMRJOB_IDXPTR)
-		/* nothing */
-#else
-		old_index = index;
-#endif
-
 		do
 		{
 			stio_tmridx_t left, right, younger;
@@ -130,23 +97,14 @@ static stio_tmridx_t sift_down (stio_t* stio, stio_tmridx_t index, int notify)
 			if (YOUNGER_THAN(&item, &stio->tmr.jobs[younger])) break;
 
 			stio->tmr.jobs[index] = stio->tmr.jobs[younger];
-#if defined(STIO_USE_TMRJOB_IDXPTR)
 			if (stio->tmr.jobs[index].idxptr) *stio->tmr.jobs[index].idxptr = index;
-#else
-			stio->tmr.jobs[index].updater (stio, younger, index, &stio->tmr.jobs[index]);
-#endif
 
 			index = younger;
 		}
 		while (index < base);
 		
 		stio->tmr.jobs[index] = item;
-#if defined(STIO_USE_TMRJOB_IDXPTR)
 		if (stio->tmr.jobs[index].idxptr) *stio->tmr.jobs[index].idxptr = index;
-#else
-		if (notify && index != old_index)
-			stio->tmr.jobs[index].updater (stio, old_index, index, &stio->tmr.jobs[index]);
-#endif
 	}
 
 	return index;
@@ -159,21 +117,13 @@ void stio_deltmrjob (stio_t* stio, stio_tmridx_t index)
 	STIO_ASSERT (index < stio->tmr.size);
 
 	item = stio->tmr.jobs[index];
-#if defined(STIO_USE_TMRJOB_IDXPTR)
 	if (stio->tmr.jobs[index].idxptr) *stio->tmr.jobs[index].idxptr = STIO_TMRIDX_INVALID;
-#else
-	stio->tmr.jobs[index].updater (stio, index, STIO_TMRIDX_INVALID, &stio->tmr.jobs[index]);
-#endif
 
 	stio->tmr.size = stio->tmr.size - 1;
 	if (stio->tmr.size > 0 && index != stio->tmr.size)
 	{
 		stio->tmr.jobs[index] = stio->tmr.jobs[stio->tmr.size];
-#if defined(STIO_USE_TMRJOB_IDXPTR)
 		if (stio->tmr.jobs[index].idxptr) *stio->tmr.jobs[index].idxptr = index;
-#else
-		stio->tmr.jobs[index].updater (stio, stio->tmr.size, index, &stio->tmr.jobs[index]);
-#endif
 		YOUNGER_THAN(&stio->tmr.jobs[index], &item)? sift_up(stio, index, 1): sift_down(stio, index, 1);
 	}
 }
@@ -202,9 +152,7 @@ stio_tmridx_t stio_instmrjob (stio_t* stio, const stio_tmrjob_t* job)
 
 	stio->tmr.size = stio->tmr.size + 1;
 	stio->tmr.jobs[index] = *job;
-#if defined(STIO_USE_TMRJOB_IDXPTR)
 	if (stio->tmr.jobs[index].idxptr) *stio->tmr.jobs[index].idxptr = index;
-#endif
 	return sift_up (stio, index, 0);
 }
 
@@ -213,9 +161,7 @@ stio_tmridx_t stio_updtmrjob (stio_t* stio, stio_tmridx_t index, const stio_tmrj
 	stio_tmrjob_t item;
 	item = stio->tmr.jobs[index];
 	stio->tmr.jobs[index] = *job;
-#if defined(STIO_USE_TMRJOB_IDXPTR)
 	if (stio->tmr.jobs[index].idxptr) *stio->tmr.jobs[index].idxptr = index;
-#endif
 	return YOUNGER_THAN(job, &item)? sift_up (stio, index, 0): sift_down (stio, index, 0);
 }
 

stio/lib/stio.c

@@ -847,7 +847,6 @@ enqueue_data:
 	}
 	else
 	{
-		q->dstadr.ptr = STIO_NULL;
 		q->dstadr.len = 0;
 	}
 

stio/lib/stio.h

@@ -48,12 +48,11 @@ struct stio_ntime_t
 	#define STIO_SYSHND_INVALID (-1)
 #endif
 
-
 typedef struct stio_adr_t stio_adr_t;
 struct stio_adr_t
 {
-	void* ptr;
 	int len;
+	void* ptr;
 };
 
 #define STIO_CONST_SWAP16(x) \