From: Joan Lledó
---
Makefile | 4 +
config.make.in | 7 +
configure.ac | 5 +
lwip/Makefile| 51 +++
lwip/config.h| 5 +
lwip/iioctl-ops.c| 418
lwip/io-ops.c| 560 ++
lwip/lwip-hurd.h | 100 +
lwip/lwip-util.c | 348 +
lwip/lwip-util.h | 41 ++
lwip/main.c | 234 +++
lwip/mig-decls.h | 68
lwip/mig-mutate.h| 44 +++
lwip/options.c | 346 +
lwip/options.h | 81
lwip/pfinet-ops.c| 119 ++
lwip/port-objs.c | 143 +++
lwip/port/include/netif/hurdethif.h | 39 ++
lwip/port/include/netif/hurdloopif.h | 36 ++
lwip/port/include/netif/hurdtunif.h | 65
lwip/port/include/netif/ifcommon.h | 60 +++
lwip/port/netif/hurdethif.c | 688
lwip/port/netif/hurdloopif.c | 112 ++
lwip/port/netif/hurdtunif.c | 734 +++
lwip/port/netif/ifcommon.c | 121 ++
lwip/socket-ops.c| 458 ++
26 files changed, 4887 insertions(+)
create mode 100644 lwip/Makefile
create mode 100644 lwip/config.h
create mode 100644 lwip/iioctl-ops.c
create mode 100644 lwip/io-ops.c
create mode 100644 lwip/lwip-hurd.h
create mode 100644 lwip/lwip-util.c
create mode 100644 lwip/lwip-util.h
create mode 100644 lwip/main.c
create mode 100644 lwip/mig-decls.h
create mode 100644 lwip/mig-mutate.h
create mode 100644 lwip/options.c
create mode 100644 lwip/options.h
create mode 100644 lwip/pfinet-ops.c
create mode 100644 lwip/port-objs.c
create mode 100644 lwip/port/include/netif/hurdethif.h
create mode 100644 lwip/port/include/netif/hurdloopif.h
create mode 100644 lwip/port/include/netif/hurdtunif.h
create mode 100644 lwip/port/include/netif/ifcommon.h
create mode 100644 lwip/port/netif/hurdethif.c
create mode 100644 lwip/port/netif/hurdloopif.c
create mode 100644 lwip/port/netif/hurdtunif.c
create mode 100644 lwip/port/netif/ifcommon.c
create mode 100644 lwip/socket-ops.c
diff --git a/Makefile b/Makefile
index 119f130b..2d9d3f80 100644
--- a/Makefile
+++ b/Makefile
@@ -50,6 +50,10 @@ ifeq ($(HAVE_SUN_RPC),yes)
prog-subdirs += nfs nfsd
endif
+ifeq ($(HAVE_LIBLWIP),yes)
+prog-subdirs += lwip
+endif
+
# Other directories
other-subdirs = hurd doc config release include
diff --git a/config.make.in b/config.make.in
index dfbf0c10..7b62e851 100644
--- a/config.make.in
+++ b/config.make.in
@@ -99,6 +99,13 @@ HAVE_SUN_RPC = @HAVE_SUN_RPC@
# Whether we found libgcrypt.
HAVE_LIBGCRYPT = @HAVE_LIBGCRYPT@
+# Whether we found liblwip.
+HAVE_LIBLWIP = @HAVE_LIBLWIP@
+
+# How to compile and link against liblwip.
+liblwip_CFLAGS = @liblwip_CFLAGS@
+liblwip_LIBS = @liblwip_LIBS@
+
# Installation tools.
INSTALL = @INSTALL@
INSTALL_PROGRAM = @INSTALL_PROGRAM@
diff --git a/configure.ac b/configure.ac
index 54aa72b0..5abedf46 100644
--- a/configure.ac
+++ b/configure.ac
@@ -344,6 +344,11 @@ AC_SUBST([libblkid_CFLAGS])
AM_PATH_LIBGCRYPT("1:1.6.0",[HAVE_LIBGCRYPT=yes], [HAVE_LIBGCRYPT=no])
AC_SUBST([HAVE_LIBGCRYPT])
+PKG_CHECK_MODULES([liblwip], [lwip], [HAVE_LIBLWIP=yes], [HAVE_LIBLWIP=no])
+AC_SUBST([HAVE_LIBLWIP])
+AC_SUBST([liblwip_CFLAGS])
+AC_SUBST([liblwip_LIBS])
+
AC_CONFIG_FILES([config.make ${makefiles}])
AC_OUTPUT
diff --git a/lwip/Makefile b/lwip/Makefile
new file mode 100644
index ..b4212500
--- /dev/null
+++ b/lwip/Makefile
@@ -0,0 +1,51 @@
+# Copyright (C) 2017 Free Software Foundation, Inc.
+#
+# This file is part of the GNU Hurd.
+#
+# The GNU Hurd is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License as
+# published by the Free Software Foundation; either version 2, or (at
+# your option) any later version.
+#
+# The GNU Hurd is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+# General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with the GNU Hurd. If not, see .
+
+dir= lwip
+makemode = server
+
+PORTDIR = $(srcdir)/port
+
+SRCS = main.c io-ops.c socket-ops.c pfinet-ops.c iioctl-ops.c
port-objs.c \
+ options.c lwip-util.c
+IFSRCS = ifcommon.c hurdethif.c hurdloopif.c hurdtunif.c
+MIGSRCS= ioServer.c socketServer.c pfinetServer.c
iioctlServer.c
+OBJS = $(pat
