stubdom: use the 1.3.0 release + patch instead of checking out from cvs
Signed-off-by: Samuel Thibault <samuel.thibault@xxxxxxxxxxxxx>
diff -r e4bf34e529fa stubdom/Makefile
--- a/stubdom/Makefile Thu Jul 17 15:14:14 2008 +0100
+++ b/stubdom/Makefile Thu Jul 17 15:29:41 2008 +0100
@@ -14,7 +14,7 @@
ZLIB_VERSION=1.2.3
LIBPCI_VERSION=2.2.9
NEWLIB_VERSION=1.16.0
-LWIP_DATE=2008-06-01
+LWIP_VERSION=1.3.0
GRUB_VERSION=0.97
WGET=wget -c
@@ -55,8 +55,8 @@
TARGET_CPPFLAGS += -isystem $(CURDIR)/$(MINI_OS)/include/posix
TARGET_CPPFLAGS += -isystem $(CROSS_PREFIX)/$(GNU_TARGET_ARCH)-xen-elf/include
TARGET_CPPFLAGS += -isystem $(GCC_INSTALL)include
-TARGET_CPPFLAGS += -isystem $(CURDIR)/lwip-cvs/src/include
-TARGET_CPPFLAGS += -isystem $(CURDIR)/lwip-cvs/src/include/ipv4
+TARGET_CPPFLAGS += -isystem $(CURDIR)/lwip/src/include
+TARGET_CPPFLAGS += -isystem $(CURDIR)/lwip/src/include/ipv4
TARGET_CPPFLAGS += -I$(CURDIR)/include
TARGET_LDFLAGS += -nostdlib -L$(CROSS_PREFIX)/$(GNU_TARGET_ARCH)-xen-elf/lib
@@ -140,8 +140,13 @@
# lwIP
######
-lwip-cvs:
- cvs -z 9 -d :pserver:anonymous@xxxxxxxxxxxxxxxxxxxxxxx:/sources/lwip co
-D $(LWIP_DATE) -d $@ lwip
+lwip-$(LWIP_VERSION).tar.gz:
+ $(WGET) http://download.savannah.gnu.org/releases/lwip/$@
+
+lwip: lwip-$(LWIP_VERSION).tar.gz
+ tar xzf $<
+ patch -d $@ -p0 < lwip.patch-cvs
+ touch $@
#######
# Links
@@ -214,12 +219,12 @@
[ -f ioemu/config-host.mak ] || \
( cd ioemu ; \
XEN_TARGET_ARCH=$(XEN_TARGET_ARCH) CFLAGS="$(TARGET_CFLAGS)" sh
configure --prefix=/usr --enable-stubdom $(IOEMU_OPTIONS))
- CPPFLAGS="$(TARGET_CPPFLAGS)" $(MAKE) -C ioemu
LWIPDIR=$(CURDIR)/lwip-cvs TOOLS=
+ CPPFLAGS="$(TARGET_CPPFLAGS)" $(MAKE) -C ioemu LWIPDIR=$(CURDIR)/lwip
TOOLS=
else
[ -f ioemu/config-host.mak ] || \
( cd ioemu ; \
CONFIG_STUBDOM=yes XEN_ROOT=$(abspath $(XEN_ROOT))
XEN_TARGET_ARCH=$(XEN_TARGET_ARCH) CFLAGS="$(TARGET_CFLAGS)" sh ./xen-setup
--cc=$(CC) --disable-gcc-check $(IOEMU_OPTIONS))
- CPPFLAGS= TARGET_CPPFLAGS="$(TARGET_CPPFLAGS)" $(MAKE) -C ioemu
LWIPDIR=$(CURDIR)/lwip-cvs TOOLS= CONFIG_STUBDOM=yes
+ CPPFLAGS= TARGET_CPPFLAGS="$(TARGET_CPPFLAGS)" $(MAKE) -C ioemu
LWIPDIR=$(CURDIR)/lwip TOOLS= CONFIG_STUBDOM=yes
endif
######
@@ -228,7 +233,7 @@
.PHONY: caml
caml: cross-newlib mk-headers
- CPPFLAGS="$(TARGET_CPPFLAGS)" CFLAGS="$(TARGET_CFLAGS)" $(MAKE) -C $@
LWIPDIR=$(CURDIR)/lwip-cvs
+ CPPFLAGS="$(TARGET_CPPFLAGS)" CFLAGS="$(TARGET_CFLAGS)" $(MAKE) -C $@
LWIPDIR=$(CURDIR)/lwip
###
# C
@@ -236,7 +241,7 @@
.PHONY: c
c: cross-newlib mk-headers
- CPPFLAGS="$(TARGET_CPPFLAGS)" CFLAGS="$(TARGET_CFLAGS)" $(MAKE) -C $@
LWIPDIR=$(CURDIR)/lwip-cvs
+ CPPFLAGS="$(TARGET_CPPFLAGS)" CFLAGS="$(TARGET_CFLAGS)" $(MAKE) -C $@
LWIPDIR=$(CURDIR)/lwip
######
# Grub
@@ -266,17 +271,17 @@
else
ioemu-stubdom: APP_OBJS=$(CURDIR)/ioemu/i386-stubdom/qemu.a
$(CURDIR)/ioemu/i386-stubdom/libqemu.a $(CURDIR)/ioemu/libqemu_common.a
endif
-ioemu-stubdom: mini-os-ioemu lwip-cvs libxc ioemu
- DEF_CPPFLAGS="$(TARGET_CPPFLAGS)" DEF_CFLAGS="-DCONFIG_QEMU
$(TARGET_CFLAGS)" DEF_LDFLAGS="$(TARGET_LDFLAGS)" $(MAKE) -C $(MINI_OS)
OBJ_DIR=$(CURDIR)/$< LWIPDIR=$(CURDIR)/lwip-cvs APP_OBJS="$(APP_OBJS)"
+ioemu-stubdom: mini-os-ioemu lwip libxc ioemu
+ DEF_CPPFLAGS="$(TARGET_CPPFLAGS)" DEF_CFLAGS="-DCONFIG_QEMU
$(TARGET_CFLAGS)" DEF_LDFLAGS="$(TARGET_LDFLAGS)" $(MAKE) -C $(MINI_OS)
OBJ_DIR=$(CURDIR)/$< LWIPDIR=$(CURDIR)/lwip APP_OBJS="$(APP_OBJS)"
CAMLLIB = $(shell ocamlc -where)
.PHONY: caml-stubdom
-caml-stubdom: mini-os-caml lwip-cvs libxc caml
- DEF_CPPFLAGS="$(TARGET_CPPFLAGS)" DEF_CFLAGS="-DCONFIG_CAML
$(TARGET_CFLAGS)" DEF_LDFLAGS="$(TARGET_LDFLAGS)" $(MAKE) -C $(MINI_OS)
OBJ_DIR=$(CURDIR)/$< LWIPDIR=$(CURDIR)/lwip-cvs
APP_OBJS="$(CURDIR)/caml/main-caml.o $(CURDIR)/caml/caml.o
$(CAMLLIB)/libasmrun.a"
+caml-stubdom: mini-os-caml lwip libxc caml
+ DEF_CPPFLAGS="$(TARGET_CPPFLAGS)" DEF_CFLAGS="-DCONFIG_CAML
$(TARGET_CFLAGS)" DEF_LDFLAGS="$(TARGET_LDFLAGS)" $(MAKE) -C $(MINI_OS)
OBJ_DIR=$(CURDIR)/$< LWIPDIR=$(CURDIR)/lwip
APP_OBJS="$(CURDIR)/caml/main-caml.o $(CURDIR)/caml/caml.o
$(CAMLLIB)/libasmrun.a"
.PHONY: c-stubdom
-c-stubdom: mini-os-c lwip-cvs libxc c
- DEF_CPPFLAGS="$(TARGET_CPPFLAGS)" DEF_CFLAGS="-DCONFIG_C
$(TARGET_CFLAGS)" DEF_LDFLAGS="$(TARGET_LDFLAGS)" $(MAKE) -C $(MINI_OS)
OBJ_DIR=$(CURDIR)/$< LWIPDIR=$(CURDIR)/lwip-cvs APP_OBJS=$(CURDIR)/c/main.a
+c-stubdom: mini-os-c lwip libxc c
+ DEF_CPPFLAGS="$(TARGET_CPPFLAGS)" DEF_CFLAGS="-DCONFIG_C
$(TARGET_CFLAGS)" DEF_LDFLAGS="$(TARGET_LDFLAGS)" $(MAKE) -C $(MINI_OS)
OBJ_DIR=$(CURDIR)/$< LWIPDIR=$(CURDIR)/lwip APP_OBJS=$(CURDIR)/c/main.a
.PHONY: pv-grub
pv-grub: mini-os-grub libxc grub
@@ -329,7 +334,7 @@
.PHONY: patchclean
patchclean: crossclean
rm -fr newlib-$(NEWLIB_VERSION)
- rm -fr lwip-cvs
+ rm -fr lwip
rm -fr grub-upstream
# clean downloads
@@ -338,6 +343,8 @@
rm -f newlib-$(NEWLIB_VERSION).tar.gz
rm -f zlib-$(ZLIB_VERSION).tar.gz
rm -f pciutils-$(LIBPCI_VERSION).tar.bz2
+ rm -f grub-$(GRUB_VERSION).tar.gz
+ rm -f lwip-$(LWIP_VERSION).tar.gz
.PHONY: distclean
distclean: downloadclean
diff -r e4bf34e529fa stubdom/lwip.patch-cvs
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/stubdom/lwip.patch-cvs Thu Jul 17 15:29:41 2008 +0100
@@ -0,0 +1,2398 @@
+? .ChangeLog.swp
+? ChangeLog
+Index: CHANGELOG
+===================================================================
+RCS file: /sources/lwip/lwip/CHANGELOG,v
+retrieving revision 1.300
+retrieving revision 1.318
+diff -u -p -r1.300 -r1.318
+--- CHANGELOG 23 Mar 2008 13:49:39 -0000 1.300
++++ CHANGELOG 14 Jul 2008 20:12:36 -0000 1.318
+@@ -19,9 +19,77 @@ HISTORY
+
+ ++ New features:
+
++ 2008-06-30 Simon Goldschmidt
++ * mem.c, opt.h, stats.h: fixed bug #21433: Calling mem_free/pbuf_free from
++ interrupt context isn't safe: LWIP_ALLOW_MEM_FREE_FROM_OTHER_CONTEXT
allows
++ mem_free to run between mem_malloc iterations. Added illegal counter for
++ mem stats.
++
++ 2008-06-27 Simon Goldschmidt
++ * stats.h/.c, some other files: patch #6483: stats module improvement:
++ Added defines to display each module's statistic individually, added stats
++ defines for MEM, MEMP and SYS modules, removed (unused) rexmit counter.
++
++ 2008-06-17 Simon Goldschmidt
++ * err.h: patch #6459: Made err_t overridable to use a more efficient type
++ (define LWIP_ERR_T in cc.h)
++
++ 2008-06-17 Simon Goldschmidt
++ * slipif.c: patch #6480: Added a configuration option for slipif for
symmetry
++ to loopif
++
++ 2008-06-17 Simon Goldschmidt (patch by Luca Ceresoli)
++ * netif.c, loopif.c, ip.c, netif.h, loopif.h, opt.h: Checked in slightly
++ modified version of patch # 6370: Moved loopif code to netif.c so that
++ loopback traffic is supported on all netifs (all local IPs).
++ Added option to limit loopback packets for each netifs.
++
+
+ ++ Bugfixes:
+
++ 2008-08-14 Simon Goldschmidt
++ * api_msg.c: fixed bug #23847: do_close_internal references freed memory
(when
++ tcp_close returns != ERR_OK)
++
++ 2008-07-08 Frédéric Bernon
++ * stats.h: Fix some build bugs introduced with patch #6483 (missing some
parameters
++ in macros, mainly if MEM_STATS=0 and MEMP_STATS=0).
++
++ 2008-06-24 Jonathan Larmour
++ * tcp_in.c: Fix for bug #23693 as suggested by Art R. Ensure cseg is unused
++ if tcp_seg_copy fails.
++
++ 2008-06-17 Simon Goldschmidt
++ * inet_chksum.c: Checked in some ideas of patch #6460 (loop optimizations)
++ and created defines for swapping bytes and folding u32 to u16.
++
++ 2008-05-30 Kieran Mansley
++ * tcp_in.c Remove redundant "if" statement, and use real rcv_wnd
++ rather than rcv_ann_wnd when deciding if packets are in-window.
++ Contributed by <arasmussen@xxxxxxxxxxxxxxxxxxxxxxxxxxx>
++
++ 2008-05-30 Kieran Mansley
++ * mem.h: Fix BUG#23254. Change macro definition of mem_* to allow
++ passing as function pointers when MEM_LIBC_MALLOC is defined.
++
++ 2008-05-09 Jonathan Larmour
++ * err.h, err.c, sockets.c: Fix bug #23119: Reorder timeout error code to
++ stop it being treated as a fatal error.
++
++ 2008-04-15 Simon Goldschmidt
++ * dhcp.c: fixed bug #22804: dhcp_stop doesn't clear NETIF_FLAG_DHCP
++ (flag now cleared)
++
++ 2008-03-27 Simon Goldschmidt
++ * mem.c, tcpip.c, tcpip.h, opt.h: fixed bug #21433 (Calling
mem_free/pbuf_free
++ from interrupt context isn't safe): set LWIP_USE_HEAP_FROM_INTERRUPT to 1
++ in lwipopts.h or use pbuf_free_callback(p)/mem_free_callback(m) to free
pbufs
++ or heap memory from interrupt context
++
++ 2008-03-26 Simon Goldschmidt
++ * tcp_in.c, tcp.c: fixed bug #22249: division by zero could occur if a
remote
++ host sent a zero mss as TCP option.
++
+
+ (STABLE-1.3.0)
+
+Index: src/api/api_msg.c
+===================================================================
+RCS file: /sources/lwip/lwip/src/api/api_msg.c,v
+retrieving revision 1.102
+retrieving revision 1.104
+diff -u -p -r1.102 -r1.104
+--- src/api/api_msg.c 21 Mar 2008 16:23:14 -0000 1.102
++++ src/api/api_msg.c 15 Jul 2008 11:18:58 -0000 1.104
+@@ -598,11 +598,16 @@ do_close_internal(struct netconn *conn)
+ LWIP_ASSERT("pcb already closed", (conn->pcb.tcp != NULL));
+
+ /* Set back some callback pointers */
++ tcp_arg(conn->pcb.tcp, NULL);
+ if (conn->pcb.tcp->state == LISTEN) {
+- tcp_arg(conn->pcb.tcp, NULL);
+ tcp_accept(conn->pcb.tcp, NULL);
+ } else {
+ tcp_recv(conn->pcb.tcp, NULL);
++ tcp_accept(conn->pcb.tcp, NULL);
++ /* some callbacks have to be reset if tcp_close is not successful */
++ tcp_sent(conn->pcb.tcp, NULL);
++ tcp_poll(conn->pcb.tcp, NULL, 4);
++ tcp_err(conn->pcb.tcp, NULL);
+ }
+ /* Try to close the connection */
+ err = tcp_close(conn->pcb.tcp);
+@@ -610,11 +615,6 @@ do_close_internal(struct netconn *conn)
+ /* Closing succeeded */
+ conn->state = NETCONN_NONE;
+ /* Set back some callback pointers as conn is going away */
+- tcp_err(conn->pcb.tcp, NULL);
+- tcp_poll(conn->pcb.tcp, NULL, 4);
+- tcp_sent(conn->pcb.tcp, NULL);
+- tcp_recv(conn->pcb.tcp, NULL);
+- tcp_arg(conn->pcb.tcp, NULL);
+ conn->pcb.tcp = NULL;
+ conn->err = ERR_OK;
+ /* Trigger select() in socket layer. This send should something else so
the
+@@ -623,6 +623,14 @@ do_close_internal(struct netconn *conn)
+ API_EVENT(conn, NETCONN_EVT_SENDPLUS, 0);
+ /* wake up the application task */
+ sys_sem_signal(conn->op_completed);
++ } else {
++ /* Closing failed, restore some of the callbacks */
++ /* Closing of listen pcb will never fail! */
++ LWIP_ASSERT("Closing a listen pcb may not fail!", (conn->pcb.tcp->state
!= LISTEN));
++ tcp_sent(conn->pcb.tcp, sent_tcp);
++ tcp_poll(conn->pcb.tcp, poll_tcp, 4);
++ tcp_err(conn->pcb.tcp, err_tcp);
++ tcp_arg(conn->pcb.tcp, conn);
+ }
+ /* If closing didn't succeed, we get called again either
+ from poll_tcp or from sent_tcp */
+Index: src/api/err.c
+===================================================================
+RCS file: /sources/lwip/lwip/src/api/err.c,v
+retrieving revision 1.11
+retrieving revision 1.12
+diff -u -p -r1.11 -r1.12
+--- src/api/err.c 13 Dec 2007 23:06:50 -0000 1.11
++++ src/api/err.c 9 May 2008 12:14:23 -0000 1.12
+@@ -44,17 +44,17 @@ static const char *err_strerr[] = {
+ "Ok.", /* ERR_OK 0 */
+ "Out of memory error.", /* ERR_MEM -1 */
+ "Buffer error.", /* ERR_BUF -2 */
+- "Routing problem.", /* ERR_RTE -3 */
+- "Connection aborted.", /* ERR_ABRT -4 */
+- "Connection reset.", /* ERR_RST -5 */
+- "Connection closed.", /* ERR_CLSD -6 */
+- "Not connected.", /* ERR_CONN -7 */
+- "Illegal value.", /* ERR_VAL -8 */
+- "Illegal argument.", /* ERR_ARG -9 */
+- "Address in use.", /* ERR_USE -10 */
+- "Low-level netif error.", /* ERR_IF -11 */
+- "Already connected.", /* ERR_ISCONN -12 */
+- "Timeout.", /* ERR_TIMEOUT -13 */
++ "Timeout.", /* ERR_TIMEOUT -3 */
++ "Routing problem.", /* ERR_RTE -4 */
++ "Connection aborted.", /* ERR_ABRT -5 */
++ "Connection reset.", /* ERR_RST -6 */
++ "Connection closed.", /* ERR_CLSD -7 */
++ "Not connected.", /* ERR_CONN -8 */
++ "Illegal value.", /* ERR_VAL -9 */
++ "Illegal argument.", /* ERR_ARG -10 */
++ "Address in use.", /* ERR_USE -11 */
++ "Low-level netif error.", /* ERR_IF -12 */
++ "Already connected.", /* ERR_ISCONN -13 */
+ "Operation in progress." /* ERR_INPROGRESS -14 */
+ };
+
+Index: src/api/netdb.c
+===================================================================
+RCS file: /sources/lwip/lwip/src/api/netdb.c,v
+retrieving revision 1.4
+retrieving revision 1.5
+diff -u -p -r1.4 -r1.5
+--- src/api/netdb.c 26 Jan 2008 16:11:39 -0000 1.4
++++ src/api/netdb.c 16 Jul 2008 20:36:12 -0000 1.5
+@@ -326,7 +326,8 @@ lwip_getaddrinfo(const char *nodename, c
+ if (nodename != NULL) {
+ /* copy nodename to canonname if specified */
+ size_t namelen = strlen(nodename);
+- ai->ai_canonname = mem_malloc(namelen + 1);
++ LWIP_ASSERT("namelen is too long", (namelen + 1) <= (mem_size_t)-1);
++ ai->ai_canonname = mem_malloc((mem_size_t)(namelen + 1));
+ if (ai->ai_canonname == NULL) {
+ goto memerr;
+ }
+Index: src/api/sockets.c
+===================================================================
+RCS file: /sources/lwip/lwip/src/api/sockets.c,v
+retrieving revision 1.116
+retrieving revision 1.117
+diff -u -p -r1.116 -r1.117
+--- src/api/sockets.c 13 Mar 2008 20:03:57 -0000 1.116
++++ src/api/sockets.c 9 May 2008 12:14:24 -0000 1.117
+@@ -128,17 +128,17 @@ static const int err_to_errno_table[] =
+ 0, /* ERR_OK 0 No error, everything OK. */
+ ENOMEM, /* ERR_MEM -1 Out of memory error. */
+ ENOBUFS, /* ERR_BUF -2 Buffer error. */
+- EHOSTUNREACH, /* ERR_RTE -3 Routing problem. */
+- ECONNABORTED, /* ERR_ABRT -4 Connection aborted. */
+- ECONNRESET, /* ERR_RST -5 Connection reset. */
+- ESHUTDOWN, /* ERR_CLSD -6 Connection closed. */
+- ENOTCONN, /* ERR_CONN -7 Not connected. */
+- EINVAL, /* ERR_VAL -8 Illegal value. */
+- EIO, /* ERR_ARG -9 Illegal argument. */
+- EADDRINUSE, /* ERR_USE -10 Address in use. */
+- -1, /* ERR_IF -11 Low-level netif error */
+- -1, /* ERR_ISCONN -12 Already connected. */
+- ETIMEDOUT, /* ERR_TIMEOUT -13 Timeout */
++ ETIMEDOUT, /* ERR_TIMEOUT -3 Timeout */
++ EHOSTUNREACH, /* ERR_RTE -4 Routing problem. */
++ ECONNABORTED, /* ERR_ABRT -5 Connection aborted. */
++ ECONNRESET, /* ERR_RST -6 Connection reset. */
++ ESHUTDOWN, /* ERR_CLSD -7 Connection closed. */
++ ENOTCONN, /* ERR_CONN -8 Not connected. */
++ EINVAL, /* ERR_VAL -9 Illegal value. */
++ EIO, /* ERR_ARG -10 Illegal argument. */
++ EADDRINUSE, /* ERR_USE -11 Address in use. */
++ -1, /* ERR_IF -12 Low-level netif error */
++ -1, /* ERR_ISCONN -13 Already connected. */
+ EINPROGRESS /* ERR_INPROGRESS -14 Operation in progress */
+ };
+
+Index: src/api/tcpip.c
+===================================================================
+RCS file: /sources/lwip/lwip/src/api/tcpip.c,v
+retrieving revision 1.70
+retrieving revision 1.73
+diff -u -p -r1.70 -r1.73
+--- src/api/tcpip.c 12 Jan 2008 11:52:22 -0000 1.70
++++ src/api/tcpip.c 27 Jun 2008 20:34:51 -0000 1.73
+@@ -518,4 +518,42 @@ tcpip_init(void (* initfunc)(void *), vo
+ sys_thread_new(TCPIP_THREAD_NAME, tcpip_thread, NULL,
TCPIP_THREAD_STACKSIZE, TCPIP_THREAD_PRIO);
+ }
+
++/**
++ * Simple callback function used with tcpip_callback to free a pbuf
++ * (pbuf_free has a wrong signature for tcpip_callback)
++ *
++ * @param p The pbuf (chain) to be dereferenced.
++ */
++static void
++pbuf_free_int(void *p)
++{
++ struct pbuf *q = p;
++ pbuf_free(q);
++}
++
++/**
++ * A simple wrapper function that allows you to free a pbuf from interrupt
context.
++ *
++ * @param p The pbuf (chain) to be dereferenced.
++ * @return ERR_OK if callback could be enqueued, an err_t if not
++ */
++err_t
++pbuf_free_callback(struct pbuf *p)
++{
++ return tcpip_callback_with_block(pbuf_free_int, p, 0);
++}
++
++/**
++ * A simple wrapper function that allows you to free heap memory from
++ * interrupt context.
++ *
++ * @param m the heap memory to free
++ * @return ERR_OK if callback could be enqueued, an err_t if not
++ */
++err_t
++mem_free_callback(void *m)
++{
++ return tcpip_callback_with_block(mem_free, m, 0);
++}
++
+ #endif /* !NO_SYS */
+Index: src/core/dhcp.c
+===================================================================
+RCS file: /sources/lwip/lwip/src/core/dhcp.c,v
+retrieving revision 1.86
+retrieving revision 1.87
+diff -u -p -r1.86 -r1.87
+--- src/core/dhcp.c 4 Mar 2008 14:25:58 -0000 1.86
++++ src/core/dhcp.c 15 Apr 2008 17:24:55 -0000 1.87
+@@ -568,6 +568,8 @@ dhcp_start(struct netif *netif)
+ LWIP_ERROR("netif != NULL", (netif != NULL), return ERR_ARG;);
+ dhcp = netif->dhcp;
+ LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | LWIP_DBG_STATE,
("dhcp_start(netif=%p) %c%c%"U16_F"\n", (void*)netif, netif->name[0],
netif->name[1], (u16_t)netif->num));
++ /* Remove the flag that says this netif is handled by DHCP,
++ it is set when we succeeded starting. */
+ netif->flags &= ~NETIF_FLAG_DHCP;
+
+ /* no DHCP client attached yet? */
+@@ -609,6 +611,7 @@ dhcp_start(struct netif *netif)
+ dhcp_stop(netif);
+ return ERR_MEM;
+ }
++ /* Set the flag that says this netif is handled by DHCP. */
+ netif->flags |= NETIF_FLAG_DHCP;
+ return result;
+ }
+@@ -1063,6 +1066,8 @@ dhcp_stop(struct netif *netif)
+ {
+ struct dhcp *dhcp = netif->dhcp;
+ LWIP_ERROR("dhcp_stop: netif != NULL", (netif != NULL), return;);
++ /* Remove the flag that says this netif is handled by DHCP. */
++ netif->flags &= ~NETIF_FLAG_DHCP;
+
+ LWIP_DEBUGF(DHCP_DEBUG | LWIP_DBG_TRACE | 3, ("dhcp_stop()\n"));
+ /* netif is DHCP configured? */
+Index: src/core/mem.c
+===================================================================
+RCS file: /sources/lwip/lwip/src/core/mem.c,v
+retrieving revision 1.59
+retrieving revision 1.62
+diff -u -p -r1.59 -r1.62
+--- src/core/mem.c 4 Mar 2008 16:31:32 -0000 1.59
++++ src/core/mem.c 30 Jun 2008 18:16:51 -0000 1.62
+@@ -177,9 +177,36 @@ static u8_t *ram;
+ static struct mem *ram_end;
+ /** pointer to the lowest free block, this is used for faster search */
+ static struct mem *lfree;
++
+ /** concurrent access protection */
+ static sys_sem_t mem_sem;
+
++#if LWIP_ALLOW_MEM_FREE_FROM_OTHER_CONTEXT
++
++static volatile u8_t mem_free_count;
++
++/* Allow mem_free from other (e.g. interrupt) context */
++#define LWIP_MEM_FREE_DECL_PROTECT() SYS_ARCH_DECL_PROTECT(lev_free)
++#define LWIP_MEM_FREE_PROTECT() SYS_ARCH_PROTECT(lev_free)
++#define LWIP_MEM_FREE_UNPROTECT() SYS_ARCH_UNPROTECT(lev_free)
++#define LWIP_MEM_ALLOC_DECL_PROTECT() SYS_ARCH_DECL_PROTECT(lev_alloc)
++#define LWIP_MEM_ALLOC_PROTECT() SYS_ARCH_PROTECT(lev_alloc)
++#define LWIP_MEM_ALLOC_UNPROTECT() SYS_ARCH_UNPROTECT(lev_alloc)
++
++#else /* LWIP_ALLOW_MEM_FREE_FROM_OTHER_CONTEXT */
++
++/* Protect the heap only by using a semaphore */
++#define LWIP_MEM_FREE_DECL_PROTECT()
++#define LWIP_MEM_FREE_PROTECT() sys_arch_sem_wait(mem_sem, 0)
++#define LWIP_MEM_FREE_UNPROTECT() sys_sem_signal(mem_sem)
++/* mem_malloc is protected using semaphore AND LWIP_MEM_ALLOC_PROTECT */
++#define LWIP_MEM_ALLOC_DECL_PROTECT()
++#define LWIP_MEM_ALLOC_PROTECT()
++#define LWIP_MEM_ALLOC_UNPROTECT()
++
++#endif /* LWIP_ALLOW_MEM_FREE_FROM_OTHER_CONTEXT */
++
++
+ /**
+ * "Plug holes" by combining adjacent empty struct mems.
+ * After this function is through, there should not exist
+@@ -255,9 +282,7 @@ mem_init(void)
+ /* initialize the lowest-free pointer to the start of the heap */
+ lfree = (struct mem *)ram;
+
+-#if MEM_STATS
+- lwip_stats.mem.avail = MEM_SIZE_ALIGNED;
+-#endif /* MEM_STATS */
++ MEM_STATS_AVAIL(avail, MEM_SIZE_ALIGNED);
+ }
+
+ /**
+@@ -270,6 +295,7 @@ void
+ mem_free(void *rmem)
+ {
+ struct mem *mem;
++ LWIP_MEM_FREE_DECL_PROTECT();
+
+ if (rmem == NULL) {
+ LWIP_DEBUGF(MEM_DEBUG | LWIP_DBG_TRACE | 2, ("mem_free(p == NULL) was
called.\n"));
+@@ -277,20 +303,20 @@ mem_free(void *rmem)
+ }
+ LWIP_ASSERT("mem_free: sanity check alignment", (((mem_ptr_t)rmem) &
(MEM_ALIGNMENT-1)) == 0);
+
+- /* protect the heap from concurrent access */
+- sys_arch_sem_wait(mem_sem, 0);
+-
+ LWIP_ASSERT("mem_free: legal memory", (u8_t *)rmem >= (u8_t *)ram &&
+ (u8_t *)rmem < (u8_t *)ram_end);
+
+ if ((u8_t *)rmem < (u8_t *)ram || (u8_t *)rmem >= (u8_t *)ram_end) {
++ SYS_ARCH_DECL_PROTECT(lev);
+ LWIP_DEBUGF(MEM_DEBUG | 3, ("mem_free: illegal memory\n"));
+-#if MEM_STATS
+- ++lwip_stats.mem.err;
+-#endif /* MEM_STATS */
+- sys_sem_signal(mem_sem);
++ /* protect mem stats from concurrent access */
++ SYS_ARCH_PROTECT(lev);
++ MEM_STATS_INC(illegal);
++ SYS_ARCH_UNPROTECT(lev);
+ return;
+ }
++ /* protect the heap from concurrent access */
++ LWIP_MEM_FREE_PROTECT();
+ /* Get the corresponding struct mem ... */
+ mem = (struct mem *)((u8_t *)rmem - SIZEOF_STRUCT_MEM);
+ /* ... which has to be in a used state ... */
+@@ -303,13 +329,14 @@ mem_free(void *rmem)
+ lfree = mem;
+ }
+
+-#if MEM_STATS
+- lwip_stats.mem.used -= mem->next - ((u8_t *)mem - ram);
+-#endif /* MEM_STATS */
++ MEM_STATS_DEC_USED(used, mem->next - ((u8_t *)mem - ram));
+
+ /* finally, see if prev or next are free also */
+ plug_holes(mem);
+- sys_sem_signal(mem_sem);
++#if LWIP_ALLOW_MEM_FREE_FROM_OTHER_CONTEXT
++ mem_free_count = 1;
++#endif /* LWIP_ALLOW_MEM_FREE_FROM_OTHER_CONTEXT */
++ LWIP_MEM_FREE_UNPROTECT();
+ }
+
+ /**
+@@ -321,6 +348,8 @@ mem_free(void *rmem)
+ * @param newsize required size after shrinking (needs to be smaller than or
+ * equal to the previous size)
+ * @return for compatibility reasons: is always == rmem, at the moment
++ * or NULL if newsize is > old size, in which case rmem is NOT touched
++ * or freed!
+ */
+ void *
+ mem_realloc(void *rmem, mem_size_t newsize)
+@@ -328,6 +357,8 @@ mem_realloc(void *rmem, mem_size_t newsi
+ mem_size_t size;
+ mem_size_t ptr, ptr2;
+ struct mem *mem, *mem2;
++ /* use the FREE_PROTECT here: it protects with sem OR SYS_ARCH_PROTECT */
++ LWIP_MEM_FREE_DECL_PROTECT();
+
+ /* Expand the size of the allocated memory region so that we can
+ adjust for alignment. */
+@@ -346,7 +377,12 @@ mem_realloc(void *rmem, mem_size_t newsi
+ (u8_t *)rmem < (u8_t *)ram_end);
+
+ if ((u8_t *)rmem < (u8_t *)ram || (u8_t *)rmem >= (u8_t *)ram_end) {
++ SYS_ARCH_DECL_PROTECT(lev);
+ LWIP_DEBUGF(MEM_DEBUG | 3, ("mem_realloc: illegal memory\n"));
++ /* protect mem stats from concurrent access */
++ SYS_ARCH_PROTECT(lev);
++ MEM_STATS_INC(illegal);
++ SYS_ARCH_UNPROTECT(lev);
+ return rmem;
+ }
+ /* Get the corresponding struct mem ... */
+@@ -366,11 +402,9 @@ mem_realloc(void *rmem, mem_size_t newsi
+ }
+
+ /* protect the heap from concurrent access */
+- sys_arch_sem_wait(mem_sem, 0);
++ LWIP_MEM_FREE_PROTECT();
+
+-#if MEM_STATS
+- lwip_stats.mem.used -= (size - newsize);
+-#endif /* MEM_STATS */
++ MEM_STATS_DEC_USED(used, (size - newsize));
+
+ mem2 = (struct mem *)&ram[mem->next];
+ if(mem2->used == 0) {
+@@ -426,7 +460,10 @@ mem_realloc(void *rmem, mem_size_t newsi
+ -> don't do anyhting.
+ -> the remaining space stays unused since it is too small
+ } */
+- sys_sem_signal(mem_sem);
++#if LWIP_ALLOW_MEM_FREE_FROM_OTHER_CONTEXT
++ mem_free_count = 1;
++#endif /* LWIP_ALLOW_MEM_FREE_FROM_OTHER_CONTEXT */
++ LWIP_MEM_FREE_UNPROTECT();
+ return rmem;
+ }
+
+@@ -444,6 +481,10 @@ mem_malloc(mem_size_t size)
+ {
+ mem_size_t ptr, ptr2;
+ struct mem *mem, *mem2;
++#if LWIP_ALLOW_MEM_FREE_FROM_OTHER_CONTEXT
++ u8_t local_mem_free_count = 0;
++#endif /* LWIP_ALLOW_MEM_FREE_FROM_OTHER_CONTEXT */
++ LWIP_MEM_ALLOC_DECL_PROTECT();
+
+ if (size == 0) {
+ return NULL;
+@@ -464,88 +505,101 @@ mem_malloc(mem_size_t size)
+
+ /* protect the heap from concurrent access */
+ sys_arch_sem_wait(mem_sem, 0);
++ LWIP_MEM_ALLOC_PROTECT();
++#if LWIP_ALLOW_MEM_FREE_FROM_OTHER_CONTEXT
++ /* run as long as a mem_free disturbed mem_malloc */
++ do {
++ local_mem_free_count = 0;
++#endif /* LWIP_ALLOW_MEM_FREE_FROM_OTHER_CONTEXT */
++
++ /* Scan through the heap searching for a free block that is big enough,
++ * beginning with the lowest free block.
++ */
++ for (ptr = (u8_t *)lfree - ram; ptr < MEM_SIZE_ALIGNED - size;
++ ptr = ((struct mem *)&ram[ptr])->next) {
++ mem = (struct mem *)&ram[ptr];
++#if LWIP_ALLOW_MEM_FREE_FROM_OTHER_CONTEXT
++ mem_free_count = 0;
++ LWIP_MEM_ALLOC_UNPROTECT();
++ /* allow mem_free to run */
++ LWIP_MEM_ALLOC_PROTECT();
++ if (mem_free_count != 0) {
++ local_mem_free_count = mem_free_count;
++ }
++ mem_free_count = 0;
++#endif /* LWIP_ALLOW_MEM_FREE_FROM_OTHER_CONTEXT */
+
+- /* Scan through the heap searching for a free block that is big enough,
+- * beginning with the lowest free block.
+- */
+- for (ptr = (u8_t *)lfree - ram; ptr < MEM_SIZE_ALIGNED - size;
+- ptr = ((struct mem *)&ram[ptr])->next) {
+- mem = (struct mem *)&ram[ptr];
+-
+- if ((!mem->used) &&
+- (mem->next - (ptr + SIZEOF_STRUCT_MEM)) >= size) {
+- /* mem is not used and at least perfect fit is possible:
+- * mem->next - (ptr + SIZEOF_STRUCT_MEM) gives us the 'user data size'
of mem */
+-
+- if (mem->next - (ptr + SIZEOF_STRUCT_MEM) >= (size + SIZEOF_STRUCT_MEM
+ MIN_SIZE_ALIGNED)) {
+- /* (in addition to the above, we test if another struct mem
(SIZEOF_STRUCT_MEM) containing
+- * at least MIN_SIZE_ALIGNED of data also fits in the 'user data
space' of 'mem')
+- * -> split large block, create empty remainder,
+- * remainder must be large enough to contain MIN_SIZE_ALIGNED data: if
+- * mem->next - (ptr + (2*SIZEOF_STRUCT_MEM)) == size,
+- * struct mem would fit in but no data between mem2 and mem2->next
+- * @todo we could leave out MIN_SIZE_ALIGNED. We would create an empty
+- * region that couldn't hold data, but when mem->next gets
freed,
+- * the 2 regions would be combined, resulting in more free
memory
+- */
+- ptr2 = ptr + SIZEOF_STRUCT_MEM + size;
+- /* create mem2 struct */
+- mem2 = (struct mem *)&ram[ptr2];
+- mem2->used = 0;
+- mem2->next = mem->next;
+- mem2->prev = ptr;
+- /* and insert it between mem and mem->next */
+- mem->next = ptr2;
+- mem->used = 1;
+-
+- if (mem2->next != MEM_SIZE_ALIGNED) {
+- ((struct mem *)&ram[mem2->next])->prev = ptr2;
+- }
+-#if MEM_STATS
+- lwip_stats.mem.used += (size + SIZEOF_STRUCT_MEM);
+- if (lwip_stats.mem.max < lwip_stats.mem.used) {
+- lwip_stats.mem.max = lwip_stats.mem.used;
++ if ((!mem->used) &&
++ (mem->next - (ptr + SIZEOF_STRUCT_MEM)) >= size) {
++ /* mem is not used and at least perfect fit is possible:
++ * mem->next - (ptr + SIZEOF_STRUCT_MEM) gives us the 'user data
size' of mem */
++
++ if (mem->next - (ptr + SIZEOF_STRUCT_MEM) >= (size +
SIZEOF_STRUCT_MEM + MIN_SIZE_ALIGNED)) {
++ /* (in addition to the above, we test if another struct mem
(SIZEOF_STRUCT_MEM) containing
++ * at least MIN_SIZE_ALIGNED of data also fits in the 'user data
space' of 'mem')
++ * -> split large block, create empty remainder,
++ * remainder must be large enough to contain MIN_SIZE_ALIGNED data:
if
++ * mem->next - (ptr + (2*SIZEOF_STRUCT_MEM)) == size,
++ * struct mem would fit in but no data between mem2 and mem2->next
++ * @todo we could leave out MIN_SIZE_ALIGNED. We would create an
empty
++ * region that couldn't hold data, but when mem->next gets
freed,
++ * the 2 regions would be combined, resulting in more free
memory
++ */
++ ptr2 = ptr + SIZEOF_STRUCT_MEM + size;
++ /* create mem2 struct */
++ mem2 = (struct mem *)&ram[ptr2];
++ mem2->used = 0;
++ mem2->next = mem->next;
++ mem2->prev = ptr;
++ /* and insert it between mem and mem->next */
++ mem->next = ptr2;
++ mem->used = 1;
++
++ if (mem2->next != MEM_SIZE_ALIGNED) {
++ ((struct mem *)&ram[mem2->next])->prev = ptr2;
++ }
++ MEM_STATS_INC_USED(used, (size + SIZEOF_STRUCT_MEM));
++ } else {
++ /* (a mem2 struct does no fit into the user data space of mem and
mem->next will always
++ * be used at this point: if not we have 2 unused structs in a row,
plug_holes should have
++ * take care of this).
++ * -> near fit or excact fit: do not split, no mem2 creation
++ * also can't move mem->next directly behind mem, since mem->next
++ * will always be used at this point!
++ */
++ mem->used = 1;
++ MEM_STATS_INC_USED(used, mem->next - ((u8_t *)mem - ram));
+ }
+-#endif /* MEM_STATS */
+- } else {
+- /* (a mem2 struct does no fit into the user data space of mem and
mem->next will always
+- * be used at this point: if not we have 2 unused structs in a row,
plug_holes should have
+- * take care of this).
+- * -> near fit or excact fit: do not split, no mem2 creation
+- * also can't move mem->next directly behind mem, since mem->next
+- * will always be used at this point!
+- */
+- mem->used = 1;
+-#if MEM_STATS
+- lwip_stats.mem.used += mem->next - ((u8_t *)mem - ram);
+- if (lwip_stats.mem.max < lwip_stats.mem.used) {
+- lwip_stats.mem.max = lwip_stats.mem.used;
+- }
+-#endif /* MEM_STATS */
+- }
+
+- if (mem == lfree) {
+- /* Find next free block after mem and update lowest free pointer */
+- while (lfree->used && lfree != ram_end) {
+- lfree = (struct mem *)&ram[lfree->next];
++ if (mem == lfree) {
++ /* Find next free block after mem and update lowest free pointer */
++ while (lfree->used && lfree != ram_end) {
++ LWIP_MEM_ALLOC_UNPROTECT();
++ /* prevent high interrupt latency... */
++ LWIP_MEM_ALLOC_PROTECT();
++ lfree = (struct mem *)&ram[lfree->next];
++ }
++ LWIP_ASSERT("mem_malloc: !lfree->used", ((lfree == ram_end) ||
(!lfree->used)));
+ }
+- LWIP_ASSERT("mem_malloc: !lfree->used", ((lfree == ram_end) ||
(!lfree->used)));
+- }
+- sys_sem_signal(mem_sem);
+- LWIP_ASSERT("mem_malloc: allocated memory not above ram_end.",
+- (mem_ptr_t)mem + SIZEOF_STRUCT_MEM + size <= (mem_ptr_t)ram_end);
+- LWIP_ASSERT("mem_malloc: allocated memory properly aligned.",
+- (unsigned long)((u8_t *)mem + SIZEOF_STRUCT_MEM) % MEM_ALIGNMENT == 0);
+- LWIP_ASSERT("mem_malloc: sanity check alignment",
+- (((mem_ptr_t)mem) & (MEM_ALIGNMENT-1)) == 0);
++ LWIP_MEM_ALLOC_UNPROTECT();
++ sys_sem_signal(mem_sem);
++ LWIP_ASSERT("mem_malloc: allocated memory not above ram_end.",
++ (mem_ptr_t)mem + SIZEOF_STRUCT_MEM + size <= (mem_ptr_t)ram_end);
++ LWIP_ASSERT("mem_malloc: allocated memory properly aligned.",
++ (unsigned long)((u8_t *)mem + SIZEOF_STRUCT_MEM) % MEM_ALIGNMENT ==
0);
++ LWIP_ASSERT("mem_malloc: sanity check alignment",
++ (((mem_ptr_t)mem) & (MEM_ALIGNMENT-1)) == 0);
+
+- return (u8_t *)mem + SIZEOF_STRUCT_MEM;
++ return (u8_t *)mem + SIZEOF_STRUCT_MEM;
++ }
+ }
+- }
++#if LWIP_ALLOW_MEM_FREE_FROM_OTHER_CONTEXT
++ /* if we got interrupted by a mem_free, try again */
++ } while(local_mem_free_count != 0);
++#endif /* LWIP_ALLOW_MEM_FREE_FROM_OTHER_CONTEXT */
+ LWIP_DEBUGF(MEM_DEBUG | 2, ("mem_malloc: could not allocate %"S16_F"
bytes\n", (s16_t)size));
+-#if MEM_STATS
+- ++lwip_stats.mem.err;
+-#endif /* MEM_STATS */
++ MEM_STATS_INC(err);
++ LWIP_MEM_ALLOC_UNPROTECT();
+ sys_sem_signal(mem_sem);
+ return NULL;
+ }
+Index: src/core/memp.c
+===================================================================
+RCS file: /sources/lwip/lwip/src/core/memp.c,v
+retrieving revision 1.55
+retrieving revision 1.56
+diff -u -p -r1.55 -r1.56
+--- src/core/memp.c 25 Nov 2007 10:43:28 -0000 1.55
++++ src/core/memp.c 27 Jun 2008 18:37:54 -0000 1.56
+@@ -252,13 +252,12 @@ memp_init(void)
+ struct memp *memp;
+ u16_t i, j;
+
+-#if MEMP_STATS
+ for (i = 0; i < MEMP_MAX; ++i) {
+- lwip_stats.memp[i].used = lwip_stats.memp[i].max =
+- lwip_stats.memp[i].err = 0;
+- lwip_stats.memp[i].avail = memp_num[i];
++ MEMP_STATS_AVAIL(used, i, 0);
++ MEMP_STATS_AVAIL(max, i, 0);
++ MEMP_STATS_AVAIL(err, i, 0);
++ MEMP_STATS_AVAIL(avail, i, memp_num[i]);
+ }
+-#endif /* MEMP_STATS */
+
+ memp = LWIP_MEM_ALIGN(memp_memory);
+ /* for every pool: */
+@@ -315,20 +314,13 @@ memp_malloc_fn(memp_t type, const char*
+ memp->file = file;
+ memp->line = line;
+ #endif /* MEMP_OVERFLOW_CHECK */
+-#if MEMP_STATS
+- ++lwip_stats.memp[type].used;
+- if (lwip_stats.memp[type].used > lwip_stats.memp[type].max) {
+- lwip_stats.memp[type].max = lwip_stats.memp[type].used;
+- }
+-#endif /* MEMP_STATS */
++ MEMP_STATS_INC_USED(used, type);
+ LWIP_ASSERT("memp_malloc: memp properly aligned",
+ ((mem_ptr_t)memp % MEM_ALIGNMENT) == 0);
+ memp = (struct memp*)((u8_t*)memp + MEMP_SIZE);
+ } else {
+ LWIP_DEBUGF(MEMP_DEBUG | 2, ("memp_malloc: out of memory in pool %s\n",
memp_desc[type]));
+-#if MEMP_STATS
+- ++lwip_stats.memp[type].err;
+-#endif /* MEMP_STATS */
++ MEMP_STATS_INC(err, type);
+ }
+
+ SYS_ARCH_UNPROTECT(old_level);
+@@ -365,9 +357,7 @@ memp_free(memp_t type, void *mem)
+ #endif /* MEMP_OVERFLOW_CHECK >= 2 */
+ #endif /* MEMP_OVERFLOW_CHECK */
+
+-#if MEMP_STATS
+- lwip_stats.memp[type].used--;
+-#endif /* MEMP_STATS */
++ MEMP_STATS_DEC(used, type);
+
+ memp->next = memp_tab[type];
+ memp_tab[type] = memp;
+Index: src/core/netif.c
+===================================================================
+RCS file: /sources/lwip/lwip/src/core/netif.c,v
+retrieving revision 1.65
+retrieving revision 1.68
+diff -u -p -r1.65 -r1.68
+--- src/core/netif.c 9 Oct 2007 20:00:55 -0000 1.65
++++ src/core/netif.c 19 Jun 2008 16:27:18 -0000 1.68
+@@ -45,6 +45,12 @@
+ #include "lwip/snmp.h"
+ #include "lwip/igmp.h"
+ #include "netif/etharp.h"
++#if ENABLE_LOOPBACK
++#include "lwip/sys.h"
++#if LWIP_NETIF_LOOPBACK_MULTITHREADING
++#include "lwip/tcpip.h"
++#endif /* LWIP_NETIF_LOOPBACK_MULTITHREADING */
++#endif /* ENABLE_LOOPBACK */
+
+ #if LWIP_NETIF_STATUS_CALLBACK
+ #define NETIF_STATUS_CALLBACK(n) { if (n->status_callback)
(n->status_callback)(n); }
+@@ -106,6 +112,10 @@ netif_add(struct netif *netif, struct ip
+ #if LWIP_IGMP
+ netif->igmp_mac_filter = NULL;
+ #endif /* LWIP_IGMP */
++#if ENABLE_LOOPBACK
++ netif->loop_first = NULL;
++ netif->loop_last = NULL;
++#endif /* ENABLE_LOOPBACK */
+
+ /* remember netif specific state information data */
+ netif->state = state;
+@@ -114,6 +124,9 @@ netif_add(struct netif *netif, struct ip
+ #if LWIP_NETIF_HWADDRHINT
+ netif->addr_hint = NULL;
+ #endif /* LWIP_NETIF_HWADDRHINT*/
++#if ENABLE_LOOPBACK && LWIP_LOOPBACK_MAX_PBUFS
++ netif->loop_cnt_current = 0;
++#endif /* ENABLE_LOOPBACK && LWIP_LOOPBACK_MAX_PBUFS */
+
+ netif_set_addr(netif, ipaddr, netmask, gw);
+
+@@ -493,7 +506,158 @@ u8_t netif_is_link_up(struct netif *neti
+ */
+ void netif_set_link_callback(struct netif *netif, void (*
link_callback)(struct netif *netif ))
+ {
+- if ( netif )
+- netif->link_callback = link_callback;
++ if (netif) {
++ netif->link_callback = link_callback;
++ }
+ }
+ #endif /* LWIP_NETIF_LINK_CALLBACK */
++
++#if ENABLE_LOOPBACK
++/**
++ * Send an IP packet to be received on the same netif (loopif-like).
++ * The pbuf is simply copied and handed back to netif->input.
++ * In multithreaded mode, this is done directly since netif->input must put
++ * the packet on a queue.
++ * In callback mode, the packet is put on an internal queue and is fed to
++ * netif->input by netif_poll().
++ *
++ * @param netif the lwip network interface structure
++ * @param p the (IP) packet to 'send'
++ * @param ipaddr the ip address to send the packet to (not used)
++ * @return ERR_OK if the packet has been sent
++ * ERR_MEM if the pbuf used to copy the packet couldn't be allocated
++ */
++err_t
++netif_loop_output(struct netif *netif, struct pbuf *p,
++ struct ip_addr *ipaddr)
++{
++ struct pbuf *r;
++ err_t err;
++ struct pbuf *last;
++#if LWIP_LOOPBACK_MAX_PBUFS
++ u8_t clen = 0;
++#endif /* LWIP_LOOPBACK_MAX_PBUFS */
++ SYS_ARCH_DECL_PROTECT(lev);
++ LWIP_UNUSED_ARG(ipaddr);
++
++ /* Allocate a new pbuf */
++ r = pbuf_alloc(PBUF_LINK, p->tot_len, PBUF_RAM);
++ if (r == NULL) {
++ return ERR_MEM;
++ }
++#if LWIP_LOOPBACK_MAX_PBUFS
++ clen = pbuf_clen(r);
++ /* check for overflow or too many pbuf on queue */
++ if(((netif->loop_cnt_current + clen) < netif->loop_cnt_current) ||
++ ((netif->loop_cnt_current + clen) > LWIP_LOOPBACK_MAX_PBUFS)) {
++ pbuf_free(r);
++ r = NULL;
++ return ERR_MEM;
++ }
++ netif->loop_cnt_current += clen;
++#endif /* LWIP_LOOPBACK_MAX_PBUFS */
++
++ /* Copy the whole pbuf queue p into the single pbuf r */
++ if ((err = pbuf_copy(r, p)) != ERR_OK) {
++ pbuf_free(r);
++ r = NULL;
++ return err;
++ }
++
++ /* Put the packet on a linked list which gets emptied through calling
++ netif_poll(). */
++
++ /* let last point to the last pbuf in chain r */
++ for (last = r; last->next != NULL; last = last->next);
++
++ SYS_ARCH_PROTECT(lev);
++ if(netif->loop_first != NULL) {
++ LWIP_ASSERT("if first != NULL, last must also be != NULL",
netif->loop_last != NULL);
++ netif->loop_last->next = r;
++ netif->loop_last = last;
++ } else {
++ netif->loop_first = r;
++ netif->loop_last = last;
++ }
++ SYS_ARCH_UNPROTECT(lev);
++
++#if LWIP_NETIF_LOOPBACK_MULTITHREADING
++ /* For multithreading environment, schedule a call to netif_poll */
++ tcpip_callback(netif_poll, netif);
++#endif /* LWIP_NETIF_LOOPBACK_MULTITHREADING */
++
++ return ERR_OK;
++}
++
++/**
++ * Call netif_poll() in the main loop of your application. This is to prevent
++ * reentering non-reentrant functions like tcp_input(). Packets passed to
++ * netif_loop_output() are put on a list that is passed to netif->input() by
++ * netif_poll().
++ */
++void
++netif_poll(struct netif *netif)
++{
++ struct pbuf *in;
++ SYS_ARCH_DECL_PROTECT(lev);
++
++ do {
++ /* Get a packet from the list. With SYS_LIGHTWEIGHT_PROT=1, this is
protected */
++ SYS_ARCH_PROTECT(lev);
++ in = netif->loop_first;
++ if(in != NULL) {
++ struct pbuf *in_end = in;
++#if LWIP_LOOPBACK_MAX_PBUFS
++ u8_t clen = pbuf_clen(in);
++ /* adjust the number of pbufs on queue */
++ LWIP_ASSERT("netif->loop_cnt_current underflow",
++ ((netif->loop_cnt_current - clen) < netif->loop_cnt_current));
++ netif->loop_cnt_current -= clen;
++#endif /* LWIP_LOOPBACK_MAX_PBUFS */
++ while(in_end->len != in_end->tot_len) {
++ LWIP_ASSERT("bogus pbuf: len != tot_len but next == NULL!",
in_end->next != NULL);
++ in_end = in_end->next;
++ }
++ /* 'in_end' now points to the last pbuf from 'in' */
++ if(in_end == netif->loop_last) {
++ /* this was the last pbuf in the list */
++ netif->loop_first = netif->loop_last = NULL;
++ } else {
++ /* pop the pbuf off the list */
++ netif->loop_first = in_end->next;
++ LWIP_ASSERT("should not be null since first != last!",
netif->loop_first != NULL);
++ }
++ /* De-queue the pbuf from its successors on the 'loop_' list. */
++ in_end->next = NULL;
++ }
++ SYS_ARCH_UNPROTECT(lev);
++
++ if(in != NULL) {
++ /* loopback packets are always IP packets! */
++ if(ip_input(in, netif) != ERR_OK) {
++ pbuf_free(in);
++ }
++ /* Don't reference the packet any more! */
++ in = NULL;
++ }
++ /* go on while there is a packet on the list */
++ } while(netif->loop_first != NULL);
++}
++
++#if !LWIP_NETIF_LOOPBACK_MULTITHREADING
++/**
++ * Calls netif_poll() for every netif on the netif_list.
++ */
++void
++netif_poll_all(void)
++{
++ struct netif *netif = netif_list;
++ /* loop through netifs */
++ while (netif != NULL) {
++ netif_poll(netif);
++ /* proceed to next network interface */
++ netif = netif->next;
++ }
++}
++#endif /* !LWIP_NETIF_LOOPBACK_MULTITHREADING */
++#endif /* ENABLE_LOOPBACK */
+Index: src/core/pbuf.c
+===================================================================
+RCS file: /sources/lwip/lwip/src/core/pbuf.c,v
+retrieving revision 1.127
+retrieving revision 1.128
+diff -u -p -r1.127 -r1.128
+--- src/core/pbuf.c 4 Mar 2008 16:37:46 -0000 1.127
++++ src/core/pbuf.c 1 Apr 2008 19:05:40 -0000 1.128
+@@ -667,8 +667,8 @@ pbuf_dechain(struct pbuf *p)
+ *
+ * @note Only one packet is copied, no packet queue!
+ *
+- * @param p_to pbuf source of the copy
+- * @param p_from pbuf destination of the copy
++ * @param p_to pbuf destination of the copy
++ * @param p_from pbuf source of the copy
+ *
+ * @return ERR_OK if pbuf was copied
+ * ERR_ARG if one of the pbufs is NULL or p_to is not big
+Index: src/core/stats.c
+===================================================================
+RCS file: /sources/lwip/lwip/src/core/stats.c,v
+retrieving revision 1.27
+retrieving revision 1.28
+diff -u -p -r1.27 -r1.28
+--- src/core/stats.c 4 Mar 2008 16:31:32 -0000 1.27
++++ src/core/stats.c 27 Jun 2008 18:37:54 -0000 1.28
+@@ -54,7 +54,6 @@ stats_display_proto(struct stats_proto *
+ {
+ LWIP_PLATFORM_DIAG(("\n%s\n\t", name));
+ LWIP_PLATFORM_DIAG(("xmit: %"STAT_COUNTER_F"\n\t", proto->xmit));
+- LWIP_PLATFORM_DIAG(("rexmit: %"STAT_COUNTER_F"\n\t", proto->rexmit));
+ LWIP_PLATFORM_DIAG(("recv: %"STAT_COUNTER_F"\n\t", proto->recv));
+ LWIP_PLATFORM_DIAG(("fw: %"STAT_COUNTER_F"\n\t", proto->fw));
+ LWIP_PLATFORM_DIAG(("drop: %"STAT_COUNTER_F"\n\t", proto->drop));
+@@ -68,6 +67,7 @@ stats_display_proto(struct stats_proto *
+ LWIP_PLATFORM_DIAG(("cachehit: %"STAT_COUNTER_F"\n", proto->cachehit));
+ }
+
++#if IGMP_STATS
+ void
+ stats_display_igmp(struct stats_igmp *igmp)
+ {
+@@ -82,7 +82,9 @@ stats_display_igmp(struct stats_igmp *ig
+ LWIP_PLATFORM_DIAG(("report_rxed: %"STAT_COUNTER_F"\n\t",
igmp->report_rxed));
+ LWIP_PLATFORM_DIAG(("group_query_rxed: %"STAT_COUNTER_F"\n",
igmp->group_query_rxed));
+ }
++#endif /* IGMP_STATS */
+
++#if MEM_STATS || MEMP_STATS
+ void
+ stats_display_mem(struct stats_mem *mem, char *name)
+ {
+@@ -93,48 +95,53 @@ stats_display_mem(struct stats_mem *mem,
+ LWIP_PLATFORM_DIAG(("err: %"U32_F"\n", (u32_t)mem->err));
+ }
+
++#if MEMP_STATS
+ void
+-stats_display(void)
++stats_display_memp(struct stats_mem *mem, int index)
+ {
+-#if MEMP_STATS
+- s16_t i;
+ char * memp_names[] = {
+ #define LWIP_MEMPOOL(name,num,size,desc) desc,
+ #include "lwip/memp_std.h"
+ };
+-#endif
+-#if LINK_STATS
+- stats_display_proto(&lwip_stats.link, "LINK");
+-#endif
+-#if ETHARP_STATS
+- stats_display_proto(&lwip_stats.etharp, "ETHARP");
+-#endif
+-#if IPFRAG_STATS
+- stats_display_proto(&lwip_stats.ip_frag, "IP_FRAG");
+-#endif
+-#if IP_STATS
+- stats_display_proto(&lwip_stats.ip, "IP");
+-#endif
+-#if ICMP_STATS
+- stats_display_proto(&lwip_stats.icmp, "ICMP");
+-#endif
+-#if IGMP_STATS
+- stats_display_igmp(&lwip_stats.igmp);
+-#endif
+-#if UDP_STATS
+- stats_display_proto(&lwip_stats.udp, "UDP");
+-#endif
+-#if TCP_STATS
+- stats_display_proto(&lwip_stats.tcp, "TCP");
+-#endif
+-#if MEM_STATS
+- stats_display_mem(&lwip_stats.mem, "HEAP");
+-#endif
+-#if MEMP_STATS
++ if(index < MEMP_MAX) {
++ stats_display_mem(mem, memp_names[index]);
++ }
++}
++#endif /* MEMP_STATS */
++#endif /* MEM_STATS || MEMP_STATS */
++
++#if SYS_STATS
++void
++stats_display_sys(struct stats_sys *sys)
++{
++ LWIP_PLATFORM_DIAG(("\nSYS\n\t"));
++ LWIP_PLATFORM_DIAG(("sem.used: %"U32_F"\n\t", (u32_t)sys->sem.used));
++ LWIP_PLATFORM_DIAG(("sem.max: %"U32_F"\n\t", (u32_t)sys->sem.max));
++ LWIP_PLATFORM_DIAG(("sem.err: %"U32_F"\n\t", (u32_t)sys->sem.err));
++ LWIP_PLATFORM_DIAG(("mbox.used: %"U32_F"\n\t", (u32_t)sys->mbox.used));
++ LWIP_PLATFORM_DIAG(("mbox.max: %"U32_F"\n\t", (u32_t)sys->mbox.max));
++ LWIP_PLATFORM_DIAG(("mbox.err: %"U32_F"\n\t", (u32_t)sys->mbox.err));
++}
++#endif /* SYS_STATS */
++
++void
++stats_display(void)
++{
++ s16_t i;
++
++ LINK_STATS_DISPLAY();
++ ETHARP_STATS_DISPLAY();
++ IPFRAG_STATS_DISPLAY();
++ IP_STATS_DISPLAY();
++ IGMP_STATS_DISPLAY();
++ ICMP_STATS_DISPLAY();
++ UDP_STATS_DISPLAY();
++ TCP_STATS_DISPLAY();
++ MEM_STATS_DISPLAY();
+ for (i = 0; i < MEMP_MAX; i++) {
+- stats_display_mem(&lwip_stats.memp[i], memp_names[i]);
++ MEMP_STATS_DISPLAY(i);
+ }
+-#endif
++ SYS_STATS_DISPLAY();
+ }
+ #endif /* LWIP_STATS_DISPLAY */
+
+Index: src/core/sys.c
+===================================================================
+RCS file: /sources/lwip/lwip/src/core/sys.c,v
+retrieving revision 1.32
+retrieving revision 1.33
+diff -u -p -r1.32 -r1.33
+--- src/core/sys.c 25 Nov 2007 13:57:05 -0000 1.32
++++ src/core/sys.c 16 Jul 2008 20:36:12 -0000 1.33
+@@ -65,7 +65,7 @@ struct sswt_cb
+ void
+ sys_mbox_fetch(sys_mbox_t mbox, void **msg)
+ {
+- u32_t time;
++ u32_t time_needed;
+ struct sys_timeouts *timeouts;
+ struct sys_timeo *tmptimeout;
+ sys_timeout_handler h;
+@@ -76,18 +76,18 @@ sys_mbox_fetch(sys_mbox_t mbox, void **m
+
+ if (!timeouts || !timeouts->next) {
+ UNLOCK_TCPIP_CORE();
+- time = sys_arch_mbox_fetch(mbox, msg, 0);
++ time_needed = sys_arch_mbox_fetch(mbox, msg, 0);
+ LOCK_TCPIP_CORE();
+ } else {
+ if (timeouts->next->time > 0) {
+ UNLOCK_TCPIP_CORE();
+- time = sys_arch_mbox_fetch(mbox, msg, timeouts->next->time);
++ time_needed = sys_arch_mbox_fetch(mbox, msg, timeouts->next->time);
+ LOCK_TCPIP_CORE();
+ } else {
+- time = SYS_ARCH_TIMEOUT;
++ time_needed = SYS_ARCH_TIMEOUT;
+ }
+
+- if (time == SYS_ARCH_TIMEOUT) {
++ if (time_needed == SYS_ARCH_TIMEOUT) {
+ /* If time == SYS_ARCH_TIMEOUT, a timeout occured before a message
+ could be fetched. We should now call the timeout handler and
+ deallocate the memory allocated for the timeout. */
+@@ -107,8 +107,8 @@ sys_mbox_fetch(sys_mbox_t mbox, void **m
+ /* If time != SYS_ARCH_TIMEOUT, a message was received before the
timeout
+ occured. The time variable is set to the number of
+ milliseconds we waited for the message. */
+- if (time < timeouts->next->time) {
+- timeouts->next->time -= time;
++ if (time_needed < timeouts->next->time) {
++ timeouts->next->time -= time_needed;
+ } else {
+ timeouts->next->time = 0;
+ }
+@@ -125,7 +125,7 @@ sys_mbox_fetch(sys_mbox_t mbox, void **m
+ void
+ sys_sem_wait(sys_sem_t sem)
+ {
+- u32_t time;
++ u32_t time_needed;
+ struct sys_timeouts *timeouts;
+ struct sys_timeo *tmptimeout;
+ sys_timeout_handler h;
+@@ -139,12 +139,12 @@ sys_sem_wait(sys_sem_t sem)
+ sys_arch_sem_wait(sem, 0);
+ } else {
+ if (timeouts->next->time > 0) {
+- time = sys_arch_sem_wait(sem, timeouts->next->time);
++ time_needed = sys_arch_sem_wait(sem, timeouts->next->time);
+ } else {
+- time = SYS_ARCH_TIMEOUT;
++ time_needed = SYS_ARCH_TIMEOUT;
+ }
+
+- if (time == SYS_ARCH_TIMEOUT) {
++ if (time_needed == SYS_ARCH_TIMEOUT) {
+ /* If time == SYS_ARCH_TIMEOUT, a timeout occured before a message
+ could be fetched. We should now call the timeout handler and
+ deallocate the memory allocated for the timeout. */
+@@ -164,8 +164,8 @@ sys_sem_wait(sys_sem_t sem)
+ /* If time != SYS_ARCH_TIMEOUT, a message was received before the
timeout
+ occured. The time variable is set to the number of
+ milliseconds we waited for the message. */
+- if (time < timeouts->next->time) {
+- timeouts->next->time -= time;
++ if (time_needed < timeouts->next->time) {
++ timeouts->next->time -= time_needed;
+ } else {
+ timeouts->next->time = 0;
+ }
+Index: src/core/tcp.c
+===================================================================
+RCS file: /sources/lwip/lwip/src/core/tcp.c,v
+retrieving revision 1.85
+retrieving revision 1.86
+diff -u -p -r1.85 -r1.86
+--- src/core/tcp.c 22 Jan 2008 21:15:15 -0000 1.85
++++ src/core/tcp.c 26 Mar 2008 11:57:13 -0000 1.86
+@@ -509,7 +509,8 @@ tcp_connect(struct tcp_pcb *pcb, struct
+ pcb->rcv_wnd = TCP_WND;
+ pcb->rcv_ann_wnd = TCP_WND;
+ pcb->snd_wnd = TCP_WND;
+- /* The send MSS is updated when an MSS option is received. */
++ /* As initial send MSS, we use TCP_MSS but limit it to 536.
++ The send MSS is updated when an MSS option is received. */
+ pcb->mss = (TCP_MSS > 536) ? 536 : TCP_MSS;
+ #if TCP_CALCULATE_EFF_SEND_MSS
+ pcb->mss = tcp_eff_send_mss(pcb->mss, ipaddr);
+@@ -991,7 +992,8 @@ tcp_alloc(u8_t prio)
+ pcb->rcv_ann_wnd = TCP_WND;
+ pcb->tos = 0;
+ pcb->ttl = TCP_TTL;
+- /* The send MSS is updated when an MSS option is received. */
++ /* As initial send MSS, we use TCP_MSS but limit it to 536.
++ The send MSS is updated when an MSS option is received. */
+ pcb->mss = (TCP_MSS > 536) ? 536 : TCP_MSS;
+ pcb->rto = 3000 / TCP_SLOW_INTERVAL;
+ pcb->sa = 0;
+Index: src/core/tcp_in.c
+===================================================================
+RCS file: /sources/lwip/lwip/src/core/tcp_in.c,v
+retrieving revision 1.97
+retrieving revision 1.100
+diff -u -p -r1.97 -r1.100
+--- src/core/tcp_in.c 22 Jan 2008 21:15:15 -0000 1.97
++++ src/core/tcp_in.c 24 Jun 2008 15:46:39 -0000 1.100
+@@ -511,7 +511,7 @@ tcp_process(struct tcp_pcb *pcb)
+ }
+ } else {
+ if (TCP_SEQ_BETWEEN(seqno, pcb->rcv_nxt,
+- pcb->rcv_nxt+pcb->rcv_ann_wnd)) {
++ pcb->rcv_nxt+pcb->rcv_wnd)) {
+ acceptable = 1;
+ }
+ }
+@@ -1038,7 +1038,7 @@ tcp_receive(struct tcp_pcb *pcb)
+ and below rcv_nxt + rcv_wnd) in order to be further
+ processed. */
+ if (TCP_SEQ_BETWEEN(seqno, pcb->rcv_nxt,
+- pcb->rcv_nxt + pcb->rcv_ann_wnd - 1)){
++ pcb->rcv_nxt + pcb->rcv_wnd - 1)){
+ if (pcb->rcv_nxt == seqno) {
+ accepted_inseq = 1;
+ /* The incoming segment is the next in sequence. We check if
+@@ -1195,14 +1195,14 @@ tcp_receive(struct tcp_pcb *pcb)
+ } else {
+ pcb->ooseq = cseg;
+ }
+- }
+- tcp_seg_free(next);
+- if (cseg->next != NULL) {
+- next = cseg->next;
+- if (TCP_SEQ_GT(seqno + cseg->len, next->tcphdr->seqno)) {
+- /* We need to trim the incoming segment. */
+- cseg->len = (u16_t)(next->tcphdr->seqno - seqno);
+- pbuf_realloc(cseg->p, cseg->len);
++ tcp_seg_free(next);
++ if (cseg->next != NULL) {
++ next = cseg->next;
++ if (TCP_SEQ_GT(seqno + cseg->len, next->tcphdr->seqno)) {
++ /* We need to trim the incoming segment. */
++ cseg->len = (u16_t)(next->tcphdr->seqno - seqno);
++ pbuf_realloc(cseg->p, cseg->len);
++ }
+ }
+ }
+ break;
+@@ -1282,10 +1282,7 @@ tcp_receive(struct tcp_pcb *pcb)
+
+ }
+ } else {
+- if(!TCP_SEQ_BETWEEN(seqno, pcb->rcv_nxt,
+- pcb->rcv_nxt + pcb->rcv_ann_wnd-1)){
+- tcp_ack_now(pcb);
+- }
++ tcp_ack_now(pcb);
+ }
+ } else {
+ /* Segments with length 0 is taken care of here. Segments that
+@@ -1331,7 +1328,8 @@ tcp_parseopt(struct tcp_pcb *pcb)
+ opts[c + 1] == 0x04) {
+ /* An MSS option with the right option length. */
+ mss = (opts[c + 2] << 8) | opts[c + 3];
+- pcb->mss = mss > TCP_MSS? TCP_MSS: mss;
++ /* Limit the mss to the configured TCP_MSS and prevent division by
zero */
++ pcb->mss = ((mss > TCP_MSS) || (mss == 0)) ? TCP_MSS : mss;
+
+ /* And we are done processing options. */
+ break;
+Index: src/core/ipv4/autoip.c
+===================================================================
+RCS file: /sources/lwip/lwip/src/core/ipv4/autoip.c,v
+retrieving revision 1.16
+retrieving revision 1.17
+diff -u -p -r1.16 -r1.17
+--- src/core/ipv4/autoip.c 26 Jan 2008 16:11:40 -0000 1.16
++++ src/core/ipv4/autoip.c 17 Jun 2008 20:16:23 -0000 1.17
+@@ -395,8 +395,8 @@ autoip_arp_reply(struct netif *netif, st
+ /* Copy struct ip_addr2 to aligned ip_addr, to support compilers without
+ * structure packing (not using structure copy which breaks
strict-aliasing rules).
+ */
+- MEMCPY(&sipaddr, &hdr->sipaddr, sizeof(sipaddr));
+- MEMCPY(&dipaddr, &hdr->dipaddr, sizeof(dipaddr));
++ SMEMCPY(&sipaddr, &hdr->sipaddr, sizeof(sipaddr));
++ SMEMCPY(&dipaddr, &hdr->dipaddr, sizeof(dipaddr));
+
+ if ((netif->autoip->state == AUTOIP_STATE_PROBING) ||
+ ((netif->autoip->state == AUTOIP_STATE_ANNOUNCING) &&
+Index: src/core/ipv4/inet_chksum.c
+===================================================================
+RCS file: /sources/lwip/lwip/src/core/ipv4/inet_chksum.c,v
+retrieving revision 1.4
+retrieving revision 1.5
+diff -u -p -r1.4 -r1.5
+--- src/core/ipv4/inet_chksum.c 10 Mar 2008 16:12:31 -0000 1.4
++++ src/core/ipv4/inet_chksum.c 17 Jun 2008 20:06:25 -0000 1.5
+@@ -41,8 +41,6 @@
+ #include "lwip/inet_chksum.h"
+ #include "lwip/inet.h"
+
+-#include <string.h>
+-
+ /* These are some reference implementations of the checksum algorithm, with
the
+ * aim of being simple, correct and fully portable. Checksumming is the
+ * first thing you would want to optimize for your platform. If you create
+@@ -65,6 +63,11 @@
+ # define LWIP_CHKSUM_ALGORITHM 0
+ #endif
+
++/** Like the name says... */
++#define SWAP_BYTES_IN_WORD(w) ((w & 0xff) << 8) | ((w & 0xff00) >> 8)
++/** Split an u32_t in two u16_ts and add them up */
++#define FOLD_U32T(u) ((u >> 16) + (u & 0x0000ffffUL))
++
+ #if (LWIP_CHKSUM_ALGORITHM == 1) /* Version #1 */
+ /**
+ * lwip checksum
+@@ -86,8 +89,7 @@ lwip_standard_chksum(void *dataptr, u16_
+ acc = 0;
+ /* dataptr may be at odd or even addresses */
+ octetptr = (u8_t*)dataptr;
+- while (len > 1)
+- {
++ while (len > 1) {
+ /* declare first octet as most significant
+ thus assume network order, ignoring host order */
+ src = (*octetptr) << 8;
+@@ -98,8 +100,7 @@ lwip_standard_chksum(void *dataptr, u16_
+ acc += src;
+ len -= 2;
+ }
+- if (len > 0)
+- {
++ if (len > 0) {
+ /* accumulate remaining octet */
+ src = (*octetptr) << 8;
+ acc += src;
+@@ -154,19 +155,22 @@ lwip_standard_chksum(void *dataptr, int
+ }
+
+ /* Consume left-over byte, if any */
+- if (len > 0)
++ if (len > 0) {
+ ((u8_t *)&t)[0] = *(u8_t *)ps;;
++ }
+
+ /* Add end bytes */
+ sum += t;
+
+- /* Fold 32-bit sum to 16 bits */
+- while ((sum >> 16) != 0)
+- sum = (sum & 0xffff) + (sum >> 16);
++ /* Fold 32-bit sum to 16 bits
++ calling this twice is propably faster than if statements... */
++ sum = FOLD_U32T(sum);
++ sum = FOLD_U32T(sum);
+
+ /* Swap if alignment was odd */
+- if (odd)
+- sum = ((sum & 0xff) << 8) | ((sum & 0xff00) >> 8);
++ if (odd) {
++ sum = SWAP_BYTES_IN_WORD(sum);
++ }
+
+ return sum;
+ }
+@@ -211,18 +215,20 @@ lwip_standard_chksum(void *dataptr, int
+
+ while (len > 7) {
+ tmp = sum + *pl++; /* ping */
+- if (tmp < sum)
++ if (tmp < sum) {
+ tmp++; /* add back carry */
++ }
+
+ sum = tmp + *pl++; /* pong */
+- if (sum < tmp)
++ if (sum < tmp) {
+ sum++; /* add back carry */
++ }
+
+ len -= 8;
+ }
+
+ /* make room in upper bits */
+- sum = (sum >> 16) + (sum & 0xffff);
++ sum = FOLD_U32T(sum);
+
+ ps = (u16_t *)pl;
+
+@@ -233,16 +239,20 @@ lwip_standard_chksum(void *dataptr, int
+ }
+
+ /* dangling tail byte remaining? */
+- if (len > 0) /* include odd byte */
++ if (len > 0) { /* include odd byte */
+ ((u8_t *)&t)[0] = *(u8_t *)ps;
++ }
+
+ sum += t; /* add end bytes */
+
+- while ((sum >> 16) != 0) /* combine halves */
+- sum = (sum >> 16) + (sum & 0xffff);
++ /* Fold 32-bit sum to 16 bits
++ calling this twice is propably faster than if statements... */
++ sum = FOLD_U32T(sum);
++ sum = FOLD_U32T(sum);
+
+- if (odd)
+- sum = ((sum & 0xff) << 8) | ((sum & 0xff00) >> 8);
++ if (odd) {
++ sum = SWAP_BYTES_IN_WORD(sum);
++ }
+
+ return sum;
+ }
+@@ -277,18 +287,18 @@ inet_chksum_pseudo(struct pbuf *p,
+ (void *)q, (void *)q->next));
+ acc += LWIP_CHKSUM(q->payload, q->len);
+ /*LWIP_DEBUGF(INET_DEBUG, ("inet_chksum_pseudo(): unwrapped
lwip_chksum()=%"X32_F" \n", acc));*/
+- while ((acc >> 16) != 0) {
+- acc = (acc & 0xffffUL) + (acc >> 16);
+- }
++ /* just executing this next line is probably faster that the if statement
needed
++ to check whether we really need to execute it, and does no harm */
++ acc = FOLD_U32T(acc);
+ if (q->len % 2 != 0) {
+ swapped = 1 - swapped;
+- acc = ((acc & 0xff) << 8) | ((acc & 0xff00UL) >> 8);
++ acc = SWAP_BYTES_IN_WORD(acc);
+ }
+ /*LWIP_DEBUGF(INET_DEBUG, ("inet_chksum_pseudo(): wrapped
lwip_chksum()=%"X32_F" \n", acc));*/
+ }
+
+ if (swapped) {
+- acc = ((acc & 0xff) << 8) | ((acc & 0xff00UL) >> 8);
++ acc = SWAP_BYTES_IN_WORD(acc);
+ }
+ acc += (src->addr & 0xffffUL);
+ acc += ((src->addr >> 16) & 0xffffUL);
+@@ -297,9 +307,10 @@ inet_chksum_pseudo(struct pbuf *p,
+ acc += (u32_t)htons((u16_t)proto);
+ acc += (u32_t)htons(proto_len);
+
+- while ((acc >> 16) != 0) {
+- acc = (acc & 0xffffUL) + (acc >> 16);
+- }
++ /* Fold 32-bit sum to 16 bits
++ calling this twice is propably faster than if statements... */
++ acc = FOLD_U32T(acc);
++ acc = FOLD_U32T(acc);
+ LWIP_DEBUGF(INET_DEBUG, ("inet_chksum_pseudo(): pbuf chain
lwip_chksum()=%"X32_F"\n", acc));
+ return (u16_t)~(acc & 0xffffUL);
+ }
+@@ -340,18 +351,17 @@ inet_chksum_pseudo_partial(struct pbuf *
+ chksum_len -= chklen;
+ LWIP_ASSERT("delete me", chksum_len < 0x7fff);
+ /*LWIP_DEBUGF(INET_DEBUG, ("inet_chksum_pseudo(): unwrapped
lwip_chksum()=%"X32_F" \n", acc));*/
+- while ((acc >> 16) != 0) {
+- acc = (acc & 0xffffUL) + (acc >> 16);
+- }
++ /* fold the upper bit down */
++ acc = FOLD_U32T(acc);
+ if (q->len % 2 != 0) {
+ swapped = 1 - swapped;
+- acc = ((acc & 0xff) << 8) | ((acc & 0xff00UL) >> 8);
++ acc = SWAP_BYTES_IN_WORD(acc);
+ }
+ /*LWIP_DEBUGF(INET_DEBUG, ("inet_chksum_pseudo(): wrapped
lwip_chksum()=%"X32_F" \n", acc));*/
+ }
+
+ if (swapped) {
+- acc = ((acc & 0xff) << 8) | ((acc & 0xff00UL) >> 8);
++ acc = SWAP_BYTES_IN_WORD(acc);
+ }
+ acc += (src->addr & 0xffffUL);
+ acc += ((src->addr >> 16) & 0xffffUL);
+@@ -360,9 +370,10 @@ inet_chksum_pseudo_partial(struct pbuf *
+ acc += (u32_t)htons((u16_t)proto);
+ acc += (u32_t)htons(proto_len);
+
+- while ((acc >> 16) != 0) {
+- acc = (acc & 0xffffUL) + (acc >> 16);
+- }
++ /* Fold 32-bit sum to 16 bits
++ calling this twice is propably faster than if statements... */
++ acc = FOLD_U32T(acc);
++ acc = FOLD_U32T(acc);
+ LWIP_DEBUGF(INET_DEBUG, ("inet_chksum_pseudo(): pbuf chain
lwip_chksum()=%"X32_F"\n", acc));
+ return (u16_t)~(acc & 0xffffUL);
+ }
+@@ -380,13 +391,7 @@ inet_chksum_pseudo_partial(struct pbuf *
+ u16_t
+ inet_chksum(void *dataptr, u16_t len)
+ {
+- u32_t acc;
+-
+- acc = LWIP_CHKSUM(dataptr, len);
+- while ((acc >> 16) != 0) {
+- acc = (acc & 0xffff) + (acc >> 16);
+- }
+- return (u16_t)~(acc & 0xffff);
++ return ~LWIP_CHKSUM(dataptr, len);
+ }
+
+ /**
+@@ -407,17 +412,15 @@ inet_chksum_pbuf(struct pbuf *p)
+ swapped = 0;
+ for(q = p; q != NULL; q = q->next) {
+ acc += LWIP_CHKSUM(q->payload, q->len);
+- while ((acc >> 16) != 0) {
+- acc = (acc & 0xffffUL) + (acc >> 16);
+- }
++ acc = FOLD_U32T(acc);
+ if (q->len % 2 != 0) {
+ swapped = 1 - swapped;
+- acc = (acc & 0x00ffUL << 8) | (acc & 0xff00UL >> 8);
++ acc = SWAP_BYTES_IN_WORD(acc);
+ }
+ }
+
+ if (swapped) {
+- acc = ((acc & 0x00ffUL) << 8) | ((acc & 0xff00UL) >> 8);
++ acc = SWAP_BYTES_IN_WORD(acc);
+ }
+ return (u16_t)~(acc & 0xffffUL);
+ }
+Index: src/core/ipv4/ip.c
+===================================================================
+RCS file: /sources/lwip/lwip/src/core/ipv4/ip.c,v
+retrieving revision 1.66
+retrieving revision 1.68
+diff -u -p -r1.66 -r1.68
+--- src/core/ipv4/ip.c 14 Jan 2008 20:53:23 -0000 1.66
++++ src/core/ipv4/ip.c 17 Jun 2008 19:39:22 -0000 1.68
+@@ -531,9 +531,19 @@ ip_output_if(struct pbuf *p, struct ip_a
+ LWIP_DEBUGF(IP_DEBUG, ("ip_output_if: %c%c%"U16_F"\n", netif->name[0],
netif->name[1], netif->num));
+ ip_debug_print(p);
+
+- LWIP_DEBUGF(IP_DEBUG, ("netif->output()"));
++#if (LWIP_NETIF_LOOPBACK || LWIP_HAVE_LOOPIF)
++ if (ip_addr_cmp(dest, &netif->ip_addr)) {
++ /* Packet to self, enqueue it for loopback */
++ LWIP_DEBUGF(IP_DEBUG, ("netif_loop_output()"));
++
++ return netif_loop_output(netif, p, dest);
++ } else
++#endif /* (LWIP_NETIF_LOOPBACK || LWIP_HAVE_LOOPIF) */
++ {
++ LWIP_DEBUGF(IP_DEBUG, ("netif->output()"));
+
+- return netif->output(netif, p, dest);
++ return netif->output(netif, p, dest);
++ }
+ }
+
+ /**
+Index: src/include/lwip/debug.h
+===================================================================
+RCS file: /sources/lwip/lwip/src/include/lwip/debug.h,v
+retrieving revision 1.37
+retrieving revision 1.39
+diff -u -p -r1.37 -r1.39
+--- src/include/lwip/debug.h 22 Sep 2007 11:16:07 -0000 1.37
++++ src/include/lwip/debug.h 16 Jul 2008 20:36:22 -0000 1.39
+@@ -61,26 +61,28 @@
+ #define LWIP_DBG_HALT 0x08U
+
+ #ifndef LWIP_NOASSERT
+-#define LWIP_ASSERT(x,y) do { if(!(y)) LWIP_PLATFORM_ASSERT(x); } while(0)
++#define LWIP_ASSERT(message, assertion) do { if(!(assertion)) \
++ LWIP_PLATFORM_ASSERT(message); } while(0)
+ #else /* LWIP_NOASSERT */
+-#define LWIP_ASSERT(x,y)
++#define LWIP_ASSERT(message, assertion)
+ #endif /* LWIP_NOASSERT */
+
+-/** print "m" message only if "e" is true, and execute "h" expression */
++/** if "expression" isn't true, then print "message" and execute "handler"
expression */
+ #ifndef LWIP_ERROR
+-#define LWIP_ERROR(m,e,h) do { if (!(e)) { LWIP_PLATFORM_ASSERT(m); h;}}
while(0)
++#define LWIP_ERROR(message, expression, handler) do { if (!(expression)) { \
++ LWIP_PLATFORM_ASSERT(message); handler;}} while(0)
+ #endif /* LWIP_ERROR */
+
+ #ifdef LWIP_DEBUG
+ /** print debug message only if debug message type is enabled...
+ * AND is of correct type AND is at least LWIP_DBG_LEVEL
+ */
+-#define LWIP_DEBUGF(debug,x) do { \
++#define LWIP_DEBUGF(debug, message) do { \
+ if ( \
+ ((debug) & LWIP_DBG_ON) && \
+ ((debug) & LWIP_DBG_TYPES_ON) && \
+ ((s16_t)((debug) & LWIP_DBG_MASK_LEVEL) >=
LWIP_DBG_MIN_LEVEL)) { \
+- LWIP_PLATFORM_DIAG(x); \
++ LWIP_PLATFORM_DIAG(message); \
+ if ((debug) & LWIP_DBG_HALT) { \
+ while(1); \
+ } \
+@@ -88,7 +90,7 @@
+ } while(0)
+
+ #else /* LWIP_DEBUG */
+-#define LWIP_DEBUGF(debug,x)
++#define LWIP_DEBUGF(debug, message)
+ #endif /* LWIP_DEBUG */
+
+ #endif /* __LWIP_DEBUG_H__ */
+Index: src/include/lwip/err.h
+===================================================================
+RCS file: /sources/lwip/lwip/src/include/lwip/err.h,v
+retrieving revision 1.13
+retrieving revision 1.15
+diff -u -p -r1.13 -r1.15
+--- src/include/lwip/err.h 13 Dec 2007 23:06:50 -0000 1.13
++++ src/include/lwip/err.h 17 Jun 2008 20:27:32 -0000 1.15
+@@ -33,37 +33,43 @@
+ #define __LWIP_ERR_H__
+
+ #include "lwip/opt.h"
++#include "lwip/arch.h"
+
+ #ifdef __cplusplus
+ extern "C" {
+ #endif
+
+-typedef s8_t err_t;
++/** Define LWIP_ERR_T in cc.h if you want to use
++ * a different type for your platform (must be signed). */
++#ifdef LWIP_ERR_T
++typedef LWIP_ERR_T err_t;
++#else /* LWIP_ERR_T */
++ typedef s8_t err_t;
++#endif /* LWIP_ERR_T*/
+
+ /* Definitions for error constants. */
+
+ #define ERR_OK 0 /* No error, everything OK. */
+ #define ERR_MEM -1 /* Out of memory error. */
+ #define ERR_BUF -2 /* Buffer error. */
+-#define ERR_RTE -3 /* Routing problem. */
++#define ERR_TIMEOUT -3 /* Timeout. */
++#define ERR_RTE -4 /* Routing problem. */
+
+ #define ERR_IS_FATAL(e) ((e) < ERR_RTE)
+
+-#define ERR_ABRT -4 /* Connection aborted. */
+-#define ERR_RST -5 /* Connection reset. */
+-#define ERR_CLSD -6 /* Connection closed. */
+-#define ERR_CONN -7 /* Not connected. */
++#define ERR_ABRT -5 /* Connection aborted. */
++#define ERR_RST -6 /* Connection reset. */
++#define ERR_CLSD -7 /* Connection closed. */
++#define ERR_CONN -8 /* Not connected. */
+
+-#define ERR_VAL -8 /* Illegal value. */
++#define ERR_VAL -9 /* Illegal value. */
+
+-#define ERR_ARG -9 /* Illegal argument. */
++#define ERR_ARG -10 /* Illegal argument. */
+
+-#define ERR_USE -10 /* Address in use. */
++#define ERR_USE -11 /* Address in use. */
+
+-#define ERR_IF -11 /* Low-level netif error */
+-#define ERR_ISCONN -12 /* Already connected. */
+-
+-#define ERR_TIMEOUT -13 /* Timeout. */
++#define ERR_IF -12 /* Low-level netif error */
++#define ERR_ISCONN -13 /* Already connected. */
+
+ #define ERR_INPROGRESS -14 /* Operation in progress */
+
+Index: src/include/lwip/mem.h
+===================================================================
+RCS file: /sources/lwip/lwip/src/include/lwip/mem.h,v
+retrieving revision 1.21
+retrieving revision 1.22
+diff -u -p -r1.21 -r1.22
+--- src/include/lwip/mem.h 4 Mar 2008 16:31:32 -0000 1.21
++++ src/include/lwip/mem.h 30 May 2008 11:37:15 -0000 1.22
+@@ -50,16 +50,16 @@ typedef size_t mem_size_t;
+ * allow these defines to be overridden.
+ */
+ #ifndef mem_free
+-#define mem_free(x) free(x)
++#define mem_free free
+ #endif
+ #ifndef mem_malloc
+-#define mem_malloc(x) malloc(x)
++#define mem_malloc malloc
+ #endif
+ #ifndef mem_calloc
+-#define mem_calloc(x, y) calloc(x, y)
++#define mem_calloc calloc
+ #endif
+ #ifndef mem_realloc
+-#define mem_realloc(x, size) (x)
++#define mem_realloc realloc
+ #endif
+ #else /* MEM_LIBC_MALLOC */
+
+Index: src/include/lwip/netif.h
+===================================================================
+RCS file: /sources/lwip/lwip/src/include/lwip/netif.h,v
+retrieving revision 1.43
+retrieving revision 1.46
+diff -u -p -r1.43 -r1.46
+--- src/include/lwip/netif.h 9 Oct 2007 19:59:59 -0000 1.43
++++ src/include/lwip/netif.h 19 Jun 2008 16:27:23 -0000 1.46
+@@ -34,6 +34,8 @@
+
+ #include "lwip/opt.h"
+
++#define ENABLE_LOOPBACK (LWIP_NETIF_LOOPBACK || LWIP_HAVE_LOOPIF)
++
+ #include "lwip/err.h"
+
+ #include "lwip/ip_addr.h"
+@@ -165,6 +167,14 @@ struct netif {
+ #if LWIP_NETIF_HWADDRHINT
+ u8_t *addr_hint;
+ #endif /* LWIP_NETIF_HWADDRHINT */
++#if ENABLE_LOOPBACK
++ /* List of packets to be queued for ourselves. */
++ struct pbuf *loop_first;
++ struct pbuf *loop_last;
++#if LWIP_LOOPBACK_MAX_PBUFS
++ u16_t loop_cnt_current;
++#endif /* LWIP_LOOPBACK_MAX_PBUFS */
++#endif /* ENABLE_LOOPBACK */
+ };
+
+ #if LWIP_SNMP
+@@ -242,4 +252,12 @@ void netif_set_link_callback(struct neti
+ }
+ #endif
+
++#if ENABLE_LOOPBACK
++err_t netif_loop_output(struct netif *netif, struct pbuf *p, struct ip_addr
*dest_ip);
++void netif_poll(struct netif *netif);
++#if !LWIP_NETIF_LOOPBACK_MULTITHREADING
++void netif_poll_all(void);
++#endif /* !LWIP_NETIF_LOOPBACK_MULTITHREADING */
++#endif /* ENABLE_LOOPBACK */
++
+ #endif /* __LWIP_NETIF_H__ */
+Index: src/include/lwip/opt.h
+===================================================================
+RCS file: /sources/lwip/lwip/src/include/lwip/opt.h,v
+retrieving revision 1.116
+retrieving revision 1.122
+diff -u -p -r1.116 -r1.122
+--- src/include/lwip/opt.h 31 Jan 2008 18:19:29 -0000 1.116
++++ src/include/lwip/opt.h 30 Jun 2008 18:16:52 -0000 1.122
+@@ -155,6 +155,27 @@
+ #define MEMP_USE_CUSTOM_POOLS 0
+ #endif
+
++/**
++ * Set this to 1 if you want to free PBUF_RAM pbufs (or call mem_free()) from
++ * interrupt context (or another context that doesn't allow waiting for a
++ * semaphore).
++ * If set to 1, mem_malloc will be protected by a semaphore and
SYS_ARCH_PROTECT,
++ * while mem_free will only use SYS_ARCH_PROTECT. mem_malloc
SYS_ARCH_UNPROTECTs
++ * with each loop so that mem_free can run.
++ *
++ * ATTENTION: As you can see from the above description, this leads to dis-/
++ * enabling interrupts often, which can be slow! Also, on low memory,
mem_malloc
++ * can need longer.
++ *
++ * If you don't want that, at least for NO_SYS=0, you can still use the
following
++ * functions to enqueue a deallocation call which then runs in the
tcpip_thread
++ * context:
++ * - pbuf_free_callback(p);
++ * - mem_free_callback(m);
++ */
++#ifndef LWIP_ALLOW_MEM_FREE_FROM_OTHER_CONTEXT
++#define LWIP_ALLOW_MEM_FREE_FROM_OTHER_CONTEXT 0
++#endif
+
+ /*
+ ------------------------------------------------
+@@ -815,6 +836,39 @@
+ #define LWIP_NETIF_HWADDRHINT 0
+ #endif
+
++/**
++ * LWIP_NETIF_LOOPBACK==1: Support sending packets with a destination IP
++ * address equal to the netif IP address, looping them back up the stack.
++ */
++#ifndef LWIP_NETIF_LOOPBACK
++#define LWIP_NETIF_LOOPBACK 0
++#endif
++
++/**
++ * LWIP_LOOPBACK_MAX_PBUFS: Maximum number of pbufs on queue for loopback
++ * sending for each netif (0 = disabled)
++ */
++#ifndef LWIP_LOOPBACK_MAX_PBUFS
++#define LWIP_LOOPBACK_MAX_PBUFS 0
++#endif
++
++/**
++ * LWIP_NETIF_LOOPBACK_MULTITHREADING: Indicates whether threading is enabled
in
++ * the system, as netifs must change how they behave depending on this setting
++ * for the LWIP_NETIF_LOOPBACK option to work.
++ * Setting this is needed to avoid reentering non-reentrant functions like
++ * tcp_input().
++ * LWIP_NETIF_LOOPBACK_MULTITHREADING==1: Indicates that the user is using
a
++ * multithreaded environment like tcpip.c. In this case, netif->input()
++ * is called directly.
++ * LWIP_NETIF_LOOPBACK_MULTITHREADING==0: Indicates a polling (or NO_SYS)
setup.
++ * The packets are put on a list and netif_poll() must be called in
++ * the main application loop.
++ */
++#ifndef LWIP_NETIF_LOOPBACK_MULTITHREADING
++#define LWIP_NETIF_LOOPBACK_MULTITHREADING (!NO_SYS)
++#endif
++
+ /*
+ ------------------------------------
+ ---------- LOOPIF options ----------
+@@ -827,20 +881,16 @@
+ #define LWIP_HAVE_LOOPIF 0
+ #endif
+
++/*
++ ------------------------------------
++ ---------- SLIPIF options ----------
++ ------------------------------------
++*/
+ /**
+- * LWIP_LOOPIF_MULTITHREADING: Indicates whether threading is enabled in
+- * the system, as LOOPIF must change how it behaves depending on this setting.
+- * Setting this is needed to avoid reentering non-reentrant functions like
+- * tcp_input().
+- * LWIP_LOOPIF_MULTITHREADING==1: Indicates that the user is using a
+- * multithreaded environment like tcpip.c. In this case, netif->input()
+- * is called directly.
+- * LWIP_LOOPIF_MULTITHREADING==0: Indicates a polling (or NO_SYS) setup.
+- * The packets are put on a list and loopif_poll() must be called in
+- * the main application loop.
++ * LWIP_HAVE_SLIPIF==1: Support slip interface and slipif.c
+ */
+-#ifndef LWIP_LOOPIF_MULTITHREADING
+-#define LWIP_LOOPIF_MULTITHREADING 1
++#ifndef LWIP_HAVE_SLIPIF
++#define LWIP_HAVE_SLIPIF 0
+ #endif
+
+ /*
+Index: src/include/lwip/sio.h
+===================================================================
+RCS file: /sources/lwip/lwip/src/include/lwip/sio.h,v
+retrieving revision 1.7
+retrieving revision 1.8
+diff -u -p -r1.7 -r1.8
+--- src/include/lwip/sio.h 6 Sep 2007 16:43:44 -0000 1.7
++++ src/include/lwip/sio.h 27 Mar 2008 18:06:02 -0000 1.8
+@@ -32,16 +32,24 @@
+ * It needs to be implemented by those platforms which need SLIP or PPP
+ */
+
++#ifndef __SIO_H__
++#define __SIO_H__
++
+ #include "lwip/arch.h"
+
+ #ifdef __cplusplus
+ extern "C" {
+ #endif
+
++/* If you want to define sio_fd_t elsewhere or differently,
++ define this in your cc.h file. */
+ #ifndef __sio_fd_t_defined
+ typedef void * sio_fd_t;
+ #endif
+
++/* The following functions can be defined to something else in your cc.h file
++ or be implemented in your custom sio.c file. */
++
+ #ifndef sio_open
+ sio_fd_t sio_open(u8_t);
+ #endif
+@@ -69,3 +77,5 @@ void sio_read_abort(sio_fd_t);
+ #ifdef __cplusplus
+ }
+ #endif
++
++#endif /* __SIO_H__ */
+Index: src/include/lwip/sockets.h
+===================================================================
+RCS file: /sources/lwip/lwip/src/include/lwip/sockets.h,v
+retrieving revision 1.38
+retrieving revision 1.39
+diff -u -p -r1.38 -r1.39
+--- src/include/lwip/sockets.h 2 Dec 2007 15:24:02 -0000 1.38
++++ src/include/lwip/sockets.h 26 Apr 2008 10:46:23 -0000 1.39
+@@ -177,7 +177,22 @@ typedef struct ip_mreq {
+ } ip_mreq;
+ #endif /* LWIP_IGMP */
+
+-/* Unimplemented for now... */
++/*
++ * The Type of Service provides an indication of the abstract
++ * parameters of the quality of service desired. These parameters are
++ * to be used to guide the selection of the actual service parameters
++ * when transmitting a datagram through a particular network. Several
++ * networks offer service precedence, which somehow treats high
++ * precedence traffic as more important than other traffic (generally
++ * by accepting only traffic above a certain precedence at time of high
++ * load). The major choice is a three way tradeoff between low-delay,
++ * high-reliability, and high-throughput.
++ * The use of the Delay, Throughput, and Reliability indications may
++ * increase the cost (in some sense) of the service. In many networks
++ * better performance for one of these parameters is coupled with worse
++ * performance on another. Except for very unusual cases at most two
++ * of these three indications should be set.
++ */
+ #define IPTOS_TOS_MASK 0x1E
+ #define IPTOS_TOS(tos) ((tos) & IPTOS_TOS_MASK)
+ #define IPTOS_LOWDELAY 0x10
+@@ -187,7 +202,13 @@ typedef struct ip_mreq {
+ #define IPTOS_MINCOST IPTOS_LOWCOST
+
+ /*
+- * Definitions for IP precedence (also in ip_tos) (Unimplemented)
++ * The Network Control precedence designation is intended to be used
++ * within a network only. The actual use and control of that
++ * designation is up to each network. The Internetwork Control
++ * designation is intended for use by gateway control originators only.
++ * If the actual use of these precedence designations is of concern to
++ * a particular network, it is the responsibility of that network to
++ * control the access to, and use of, those precedence designations.
+ */
+ #define IPTOS_PREC_MASK 0xe0
+ #define IPTOS_PREC(tos) ((tos) & IPTOS_PREC_MASK)
+Index: src/include/lwip/stats.h
+===================================================================
+RCS file: /sources/lwip/lwip/src/include/lwip/stats.h,v
+retrieving revision 1.19
+retrieving revision 1.23
+diff -u -p -r1.19 -r1.23
+--- src/include/lwip/stats.h 28 Nov 2007 21:25:07 -0000 1.19
++++ src/include/lwip/stats.h 8 Jul 2008 09:15:57 -0000 1.23
+@@ -57,7 +57,6 @@ extern "C" {
+
+ struct stats_proto {
+ STAT_COUNTER xmit; /* Transmitted packets. */
+- STAT_COUNTER rexmit; /* Retransmitted packets. */
+ STAT_COUNTER recv; /* Received packets. */
+ STAT_COUNTER fw; /* Forwarded packets. */
+ STAT_COUNTER drop; /* Dropped packets. */
+@@ -87,7 +86,8 @@ struct stats_mem {
+ mem_size_t avail;
+ mem_size_t used;
+ mem_size_t max;
+- mem_size_t err;
++ STAT_COUNTER err;
++ STAT_COUNTER illegal;
+ };
+
+ struct stats_syselem {
+@@ -142,64 +142,138 @@ extern struct stats_ lwip_stats;
+ #define stats_init() /* Compatibility define, not init needed. */
+
+ #define STATS_INC(x) ++lwip_stats.x
++#define STATS_DEC(x) --lwip_stats.x
+ #else
+ #define stats_init()
+ #define STATS_INC(x)
++#define STATS_DEC(x)
+ #endif /* LWIP_STATS */
+
+ #if TCP_STATS
+ #define TCP_STATS_INC(x) STATS_INC(x)
++#define TCP_STATS_DISPLAY() stats_display_proto(&lwip_stats.tcp, "TCP")
+ #else
+ #define TCP_STATS_INC(x)
++#define TCP_STATS_DISPLAY()
+ #endif
+
+ #if UDP_STATS
+ #define UDP_STATS_INC(x) STATS_INC(x)
++#define UDP_STATS_DISPLAY() stats_display_proto(&lwip_stats.udp, "UDP")
+ #else
+ #define UDP_STATS_INC(x)
++#define UDP_STATS_DISPLAY()
+ #endif
+
+ #if ICMP_STATS
+ #define ICMP_STATS_INC(x) STATS_INC(x)
++#define ICMP_STATS_DISPLAY() stats_display_proto(&lwip_stats.icmp, "ICMP")
+ #else
+ #define ICMP_STATS_INC(x)
++#define ICMP_STATS_DISPLAY()
+ #endif
+
+ #if IGMP_STATS
+ #define IGMP_STATS_INC(x) STATS_INC(x)
++#define IGMP_STATS_DISPLAY() stats_display_igmp(&lwip_stats.igmp)
+ #else
+ #define IGMP_STATS_INC(x)
++#define IGMP_STATS_DISPLAY()
+ #endif
+
+ #if IP_STATS
+ #define IP_STATS_INC(x) STATS_INC(x)
++#define IP_STATS_DISPLAY() stats_display_proto(&lwip_stats.ip, "IP")
+ #else
+ #define IP_STATS_INC(x)
++#define IP_STATS_DISPLAY()
+ #endif
+
+ #if IPFRAG_STATS
+ #define IPFRAG_STATS_INC(x) STATS_INC(x)
++#define IPFRAG_STATS_DISPLAY() stats_display_proto(&lwip_stats.ip_frag,
"IP_FRAG")
+ #else
+ #define IPFRAG_STATS_INC(x)
++#define IPFRAG_STATS_DISPLAY()
+ #endif
+
+ #if ETHARP_STATS
+ #define ETHARP_STATS_INC(x) STATS_INC(x)
++#define ETHARP_STATS_DISPLAY() stats_display_proto(&lwip_stats.etharp,
"ETHARP")
+ #else
+ #define ETHARP_STATS_INC(x)
++#define ETHARP_STATS_DISPLAY()
+ #endif
+
+ #if LINK_STATS
+ #define LINK_STATS_INC(x) STATS_INC(x)
++#define LINK_STATS_DISPLAY() stats_display_proto(&lwip_stats.link, "LINK")
+ #else
+ #define LINK_STATS_INC(x)
++#define LINK_STATS_DISPLAY()
++#endif
++
++#if MEM_STATS
++#define MEM_STATS_AVAIL(x, y) lwip_stats.mem.x = y
++#define MEM_STATS_INC(x) STATS_INC(mem.x)
++#define MEM_STATS_INC_USED(x, y) do { lwip_stats.mem.used += y; \
++ if (lwip_stats.mem.max <
lwip_stats.mem.used) { \
++ lwip_stats.mem.max =
lwip_stats.mem.used; \
++ } \
++ } while(0)
++#define MEM_STATS_DEC_USED(x, y) lwip_stats.mem.x -= y
++#define MEM_STATS_DISPLAY() stats_display_mem(&lwip_stats.mem, "HEAP")
++#else
++#define MEM_STATS_AVAIL(x, y)
++#define MEM_STATS_INC(x)
++#define MEM_STATS_INC_USED(x, y)
++#define MEM_STATS_DEC_USED(x, y)
++#define MEM_STATS_DISPLAY()
++#endif
++
++#if MEMP_STATS
++#define MEMP_STATS_AVAIL(x, i, y) lwip_stats.memp[i].x = y
++#define MEMP_STATS_INC(x, i) STATS_INC(memp[i].x)
++#define MEMP_STATS_DEC(x, i) STATS_DEC(memp[i].x)
++#define MEMP_STATS_INC_USED(x, i) do { ++lwip_stats.memp[i].used; \
++ if (lwip_stats.memp[i].max <
lwip_stats.memp[i].used) { \
++ lwip_stats.memp[i].max =
lwip_stats.memp[i].used; \
++ } \
++ } while(0)
++#define MEMP_STATS_DISPLAY(i) stats_display_memp(&lwip_stats.memp[i], i)
++#else
++#define MEMP_STATS_AVAIL(x, i, y)
++#define MEMP_STATS_INC(x, i)
++#define MEMP_STATS_DEC(x, i)
++#define MEMP_STATS_INC_USED(x, i)
++#define MEMP_STATS_DISPLAY(i)
++#endif
++
++#if SYS_STATS
++#define SYS_STATS_INC(x) STATS_INC(sys.x)
++#define SYS_STATS_DEC(x) STATS_DEC(sys.x)
++#define SYS_STATS_DISPLAY() stats_display_sys(&lwip_stats.sys)
++#else
++#define SYS_STATS_INC(x)
++#define SYS_STATS_DEC(x)
++#define SYS_STATS_DISPLAY()
+ #endif
+
+ /* Display of statistics */
+ #if LWIP_STATS_DISPLAY
+ void stats_display(void);
++void stats_display_proto(struct stats_proto *proto, char *name);
++void stats_display_igmp(struct stats_igmp *igmp);
++void stats_display_mem(struct stats_mem *mem, char *name);
++void stats_display_memp(struct stats_mem *mem, int index);
++void stats_display_sys(struct stats_sys *sys);
+ #else
+ #define stats_display()
++#define stats_display_proto(proto, name)
++#define stats_display_igmp(igmp)
++#define stats_display_mem(mem, name)
++#define stats_display_memp(mem, index)
++#define stats_display_sys(sys)
+ #endif /* LWIP_STATS_DISPLAY */
+
+ #ifdef __cplusplus
+Index: src/include/lwip/tcpip.h
+===================================================================
+RCS file: /sources/lwip/lwip/src/include/lwip/tcpip.h,v
+retrieving revision 1.24
+retrieving revision 1.27
+diff -u -p -r1.24 -r1.27
+--- src/include/lwip/tcpip.h 12 Jan 2008 11:52:22 -0000 1.24
++++ src/include/lwip/tcpip.h 27 Jun 2008 20:34:55 -0000 1.27
+@@ -83,7 +83,11 @@ err_t tcpip_netifapi_lock(struct netifap
+ #endif /* LWIP_NETIF_API */
+
+ err_t tcpip_callback_with_block(void (*f)(void *ctx), void *ctx, u8_t block);
+-#define tcpip_callback(f,ctx) tcpip_callback_with_block(f,ctx,1)
++#define tcpip_callback(f, ctx) tcpip_callback_with_block(f, ctx,
1)
++
++/* free pbufs or heap memory from another context without blocking */
++err_t pbuf_free_callback(struct pbuf *p);
++err_t mem_free_callback(void *m);
+
+ err_t tcpip_timeout(u32_t msecs, sys_timeout_handler h, void *arg);
+ #define tcpip_untimeout(h, arg) tcpip_timeout(0xffffffff, h, arg)
+Index: src/include/netif/loopif.h
+===================================================================
+RCS file: /sources/lwip/lwip/src/include/netif/loopif.h,v
+retrieving revision 1.7
+retrieving revision 1.9
+diff -u -p -r1.7 -r1.9
+--- src/include/netif/loopif.h 10 May 2007 10:59:20 -0000 1.7
++++ src/include/netif/loopif.h 17 Jun 2008 20:12:22 -0000 1.9
+@@ -32,6 +32,7 @@
+ #ifndef __NETIF_LOOPIF_H__
+ #define __NETIF_LOOPIF_H__
+
++#include "lwip/opt.h"
+ #include "lwip/netif.h"
+ #include "lwip/err.h"
+
+@@ -39,9 +40,9 @@
+ extern "C" {
+ #endif
+
+-#if !LWIP_LOOPIF_MULTITHREADING
+-void loopif_poll(struct netif *netif);
+-#endif
++#if !LWIP_NETIF_LOOPBACK_MULTITHREADING
++#define loopif_poll netif_poll
++#endif /* !LWIP_NETIF_LOOPBACK_MULTITHREADING */
+
+ err_t loopif_init(struct netif *netif);
+
+Index: src/netif/etharp.c
+===================================================================
+RCS file: /sources/lwip/lwip/src/netif/etharp.c,v
+retrieving revision 1.145
+retrieving revision 1.148
+diff -u -p -r1.145 -r1.148
+--- src/netif/etharp.c 4 Mar 2008 13:41:24 -0000 1.145
++++ src/netif/etharp.c 19 Jun 2008 16:40:59 -0000 1.148
+@@ -353,7 +353,7 @@ find_entry(struct ip_addr *ipaddr, u8_t
+ * 1) empty entry
+ * 2) oldest stable entry
+ * 3) oldest pending entry without queued packets
+- * 4) oldest pending entry without queued packets
++ * 4) oldest pending entry with queued packets
+ *
+ * { ETHARP_TRY_HARD is set at this point }
+ */
+@@ -1130,7 +1130,14 @@ ethernet_input(struct pbuf *p, struct ne
+
+ /* points to packet payload, which starts with an Ethernet header */
+ ethhdr = p->payload;
+-
++ LWIP_DEBUGF(ETHARP_DEBUG | LWIP_DBG_TRACE,
++ ("ethernet_input: dest:%02x:%02x:%02x:%02x:%02x:%02x,
src:%02x:%02x:%02x:%02x:%02x:%02x, type:%2hx\n",
++ (unsigned)ethhdr->dest.addr[0], (unsigned)ethhdr->dest.addr[1],
(unsigned)ethhdr->dest.addr[2],
++ (unsigned)ethhdr->dest.addr[3], (unsigned)ethhdr->dest.addr[4],
(unsigned)ethhdr->dest.addr[5],
++ (unsigned)ethhdr->src.addr[0], (unsigned)ethhdr->src.addr[1],
(unsigned)ethhdr->src.addr[2],
++ (unsigned)ethhdr->src.addr[3], (unsigned)ethhdr->src.addr[4],
(unsigned)ethhdr->src.addr[5],
++ (unsigned)htons(ethhdr->type)));
++
+ switch (htons(ethhdr->type)) {
+ /* IP packet? */
+ case ETHTYPE_IP:
+@@ -1165,6 +1172,8 @@ ethernet_input(struct pbuf *p, struct ne
+ #endif /* PPPOE_SUPPORT */
+
+ default:
++ ETHARP_STATS_INC(etharp.proterr);
++ ETHARP_STATS_INC(etharp.drop);
+ pbuf_free(p);
+ p = NULL;
+ break;
+Index: src/netif/loopif.c
+===================================================================
+RCS file: /sources/lwip/lwip/src/netif/loopif.c,v
+retrieving revision 1.26
+retrieving revision 1.27
+diff -u -p -r1.26 -r1.27
+--- src/netif/loopif.c 31 Aug 2007 10:14:09 -0000 1.26
++++ src/netif/loopif.c 12 Jun 2008 20:10:10 -0000 1.27
+@@ -40,149 +40,8 @@
+ #if LWIP_HAVE_LOOPIF
+
+ #include "netif/loopif.h"
+-#include "lwip/pbuf.h"
+ #include "lwip/snmp.h"
+
+-#include <string.h>
+-
+-#if !LWIP_LOOPIF_MULTITHREADING
+-
+-#include "lwip/sys.h"
+-#include "lwip/mem.h"
+-
+-/* helper struct for the linked list of pbufs */
+-struct loopif_private {
+- struct pbuf *first;
+- struct pbuf *last;
+-};
+-
+-/**
+- * Call loopif_poll() in the main loop of your application. This is to prevent
+- * reentering non-reentrant functions like tcp_input(). Packets passed to
+- * loopif_output() are put on a list that is passed to netif->input() by
+- * loopif_poll().
+- *
+- * @param netif the lwip network interface structure for this loopif
+- */
+-void
+-loopif_poll(struct netif *netif)
+-{
+- SYS_ARCH_DECL_PROTECT(lev);
+- struct pbuf *in, *in_end;
+- struct loopif_private *priv = (struct loopif_private*)netif->state;
+-
+- LWIP_ERROR("priv != NULL", (priv != NULL), return;);
+-
+- do {
+- /* Get a packet from the list. With SYS_LIGHTWEIGHT_PROT=1, this is
protected */
+- SYS_ARCH_PROTECT(lev);
+- in = priv->first;
+- if(in) {
+- in_end = in;
+- while(in_end->len != in_end->tot_len) {
+- LWIP_ASSERT("bogus pbuf: len != tot_len but next == NULL!",
in_end->next != NULL);
+- in_end = in_end->next;
+- }
+- /* 'in_end' now points to the last pbuf from 'in' */
+- if(in_end == priv->last) {
+- /* this was the last pbuf in the list */
+- priv->first = priv->last = NULL;
+- } else {
+- /* pop the pbuf off the list */
+- priv->first = in_end->next;
+- LWIP_ASSERT("should not be null since first != last!", priv->first !=
NULL);
+- }
+- }
+- SYS_ARCH_UNPROTECT(lev);
+-
+- if(in != NULL) {
+- if(in_end->next != NULL) {
+- /* De-queue the pbuf from its successors on the 'priv' list. */
+- in_end->next = NULL;
+- }
+- if(netif->input(in, netif) != ERR_OK) {
+- pbuf_free(in);
+- }
+- /* Don't reference the packet any more! */
+- in = NULL;
+- in_end = NULL;
+- }
+- /* go on while there is a packet on the list */
+- } while(priv->first != NULL);
+-}
+-#endif /* LWIP_LOOPIF_MULTITHREADING */
+-
+-/**
+- * Send an IP packet over the loopback interface.
+- * The pbuf is simply copied and handed back to netif->input.
+- * In multithreaded mode, this is done directly since netif->input must put
+- * the packet on a queue.
+- * In callback mode, the packet is put on an internal queue and is fed to
+- * netif->input by loopif_poll().
+- *
+- * @param netif the lwip network interface structure for this loopif
+- * @param p the (IP) packet to 'send'
+- * @param ipaddr the ip address to send the packet to (not used for loopif)
+- * @return ERR_OK if the packet has been sent
+- * ERR_MEM if the pbuf used to copy the packet couldn't be allocated
+- */
+-static err_t
+-loopif_output(struct netif *netif, struct pbuf *p,
+- struct ip_addr *ipaddr)
+-{
+-#if !LWIP_LOOPIF_MULTITHREADING
+- SYS_ARCH_DECL_PROTECT(lev);
+- struct loopif_private *priv;
+- struct pbuf *last;
+-#endif /* LWIP_LOOPIF_MULTITHREADING */
+- struct pbuf *r;
+- err_t err;
+-
+- LWIP_UNUSED_ARG(ipaddr);
+-
+- /* Allocate a new pbuf */
+- r = pbuf_alloc(PBUF_RAW, p->tot_len, PBUF_RAM);
+- if (r == NULL) {
+- return ERR_MEM;
+- }
+-
+- /* Copy the whole pbuf queue p into the single pbuf r */
+- if ((err = pbuf_copy(r, p)) != ERR_OK) {
+- pbuf_free(r);
+- r = NULL;
+- return err;
+- }
+-
+-#if LWIP_LOOPIF_MULTITHREADING
+- /* Multithreading environment, netif->input() is supposed to put the packet
+- into a mailbox, so we can safely call it here without risking to re-enter
+- functions that are not reentrant (TCP!!!) */
+- if(netif->input(r, netif) != ERR_OK) {
+- pbuf_free(r);
+- r = NULL;
+- }
+-#else /* LWIP_LOOPIF_MULTITHREADING */
+- /* Raw API without threads: put the packet on a linked list which gets
emptied
+- through calling loopif_poll(). */
+- priv = (struct loopif_private*)netif->state;
+-
+- /* let last point to the last pbuf in chain r */
+- for (last = r; last->next != NULL; last = last->next);
+- SYS_ARCH_PROTECT(lev);
+- if(priv->first != NULL) {
+- LWIP_ASSERT("if first != NULL, last must also be != NULL", priv->last !=
NULL);
+- priv->last->next = r;
+- priv->last = last;
+- } else {
+- priv->first = r;
+- priv->last = last;
+- }
+- SYS_ARCH_UNPROTECT(lev);
+-#endif /* LWIP_LOOPIF_MULTITHREADING */
+-
+- return ERR_OK;
+-}
+-
+ /**
+ * Initialize a lwip network interface structure for a loopback interface
+ *
+@@ -193,16 +52,6 @@ loopif_output(struct netif *netif, struc
+ err_t
+ loopif_init(struct netif *netif)
+ {
+-#if !LWIP_LOOPIF_MULTITHREADING
+- struct loopif_private *priv;
+-
+- priv = (struct loopif_private*)mem_malloc(sizeof(struct loopif_private));
+- if(priv == NULL)
+- return ERR_MEM;
+- priv->first = priv->last = NULL;
+- netif->state = priv;
+-#endif /* LWIP_LOOPIF_MULTITHREADING */
+-
+ /* initialize the snmp variables and counters inside the struct netif
+ * ifSpeed: no assumption can be made!
+ */
+@@ -210,7 +59,7 @@ loopif_init(struct netif *netif)
+
+ netif->name[0] = 'l';
+ netif->name[1] = 'o';
+- netif->output = loopif_output;
++ netif->output = netif_loop_output;
+ return ERR_OK;
+ }
+
+Index: src/netif/slipif.c
+===================================================================
+RCS file: /sources/lwip/lwip/src/netif/slipif.c,v
+retrieving revision 1.29
+retrieving revision 1.30
+diff -u -p -r1.29 -r1.30
+--- src/netif/slipif.c 30 Nov 2007 17:22:21 -0000 1.29
++++ src/netif/slipif.c 17 Jun 2008 20:14:05 -0000 1.30
+@@ -44,6 +44,9 @@
+
+ #include "netif/slipif.h"
+ #include "lwip/opt.h"
++
++#if LWIP_HAVE_SLIPIF
++
+ #include "lwip/def.h"
+ #include "lwip/pbuf.h"
+ #include "lwip/sys.h"
+@@ -273,3 +276,4 @@ slipif_init(struct netif *netif)
+ sys_thread_new(SLIPIF_THREAD_NAME, slipif_loop, netif,
SLIPIF_THREAD_STACKSIZE, SLIPIF_THREAD_PRIO);
+ return ERR_OK;
+ }
++#endif /* LWIP_HAVE_SLIPIF */
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