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  • Committer: Teddy Hogeborn
  • Date: 2019-07-14 23:39:53 UTC
  • Revision ID: teddy@recompile.se-20190714233953-1zmsd3o062xloazt
Server bug fix: Allow restarts when using port= option

If the Mandos server is configured to use a specific TCP port to
listen to (by using the port= option in mandos.conf or the command
line --port option), that port becomes unusable for a time when the
Mandos server is restarted, making restarts fail.  Avoid this by, if a
port number is specified, using SO_REUSEADDR when binding the
listening TCP socket to a port number.

* mandos (IPv6_TCPServer.server_bind): Set self.allow_reuse_address if
                                       a port number is specified.

Reported-by: Juan Miguel Alcarria Herrera <juanmi@arco2000.es>

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Lines of Context:
Makefile
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        -Wmissing-format-attribute -Wnormalized=nfc -Wpacked \
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        -Wredundant-decls -Wnested-externs -Winline -Wvla \
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        -Wvolatile-register-var -Woverlength-strings
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#DEBUG:=-ggdb3 -fsanitize=address 
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# For info about _FORTIFY_SOURCE, see feature_test_macros(7)
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# and <https://gcc.gnu.org/ml/gcc-patches/2004-09/msg02055.html>.
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FORTIFY:=-D_FORTIFY_SOURCE=2 -fstack-protector-all -fPIC
 
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#DEBUG:=-ggdb3 -fsanitize=address $(SANITIZE)
 
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## Check which sanitizing options can be used
 
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#SANITIZE:=$(foreach option,$(ALL_SANITIZE_OPTIONS),$(shell \
 
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#       echo 'int main(){}' | $(CC) --language=c $(option) \
 
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#       /dev/stdin -o /dev/null >/dev/null 2>&1 && echo $(option)))
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# <https://developerblog.redhat.com/2014/10/16/gcc-undefined-behavior-sanitizer-ubsan/>
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ALL_SANITIZE_OPTIONS:=-fsanitize=leak -fsanitize=undefined \
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        -fsanitize=shift -fsanitize=integer-divide-by-zero \
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        -fsanitize=float-cast-overflow -fsanitize=nonnull-attribute \
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        -fsanitize=returns-nonnull-attribute -fsanitize=bool \
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        -fsanitize=enum
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# Check which sanitizing options can be used
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SANITIZE:=$(foreach option,$(ALL_SANITIZE_OPTIONS),$(shell \
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        echo 'int main(){}' | $(CC) --language=c $(option) /dev/stdin \
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        -o /dev/null >/dev/null 2>&1 && echo $(option)))
 
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# For info about _FORTIFY_SOURCE, see feature_test_macros(7)
 
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# and <https://gcc.gnu.org/ml/gcc-patches/2004-09/msg02055.html>.
 
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FORTIFY:=-D_FORTIFY_SOURCE=2 -fstack-protector-all -fPIC
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LINK_FORTIFY_LD:=-z relro -z now
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LINK_FORTIFY:=
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version:=1.8.4
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SED:=sed
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USER:=$(firstword $(subst :, ,$(shell getent passwd _mandos || getent passwd nobody || echo 65534)))
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GROUP:=$(firstword $(subst :, ,$(shell getent group _mandos || getent group nogroup || echo 65534)))
 
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USER:=$(firstword $(subst :, ,$(shell getent passwd _mandos \
 
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        || getent passwd nobody || echo 65534)))
 
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GROUP:=$(firstword $(subst :, ,$(shell getent group _mandos \
 
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        || getent group nogroup || echo 65534)))
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## Use these settings for a traditional /usr/local install
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# PREFIX:=$(DESTDIR)/usr/local
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LIBNL3_LIBS:=$(shell pkg-config --libs libnl-route-3.0)
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# Do not change these two
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CFLAGS+=$(WARN) $(DEBUG) $(FORTIFY) $(SANITIZE) $(COVERAGE) \
 
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CFLAGS+=$(WARN) $(DEBUG) $(FORTIFY) $(COVERAGE) \
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        $(OPTIMIZE) $(LANGUAGE) -DVERSION='"$(version)"'
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LDFLAGS+=-Xlinker --as-needed $(COVERAGE) $(LINK_FORTIFY) $(foreach flag,$(LINK_FORTIFY_LD),-Xlinker $(flag))
 
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LDFLAGS+=-Xlinker --as-needed $(COVERAGE) $(LINK_FORTIFY) $(strip \
 
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        ) $(foreach flag,$(LINK_FORTIFY_LD),-Xlinker $(flag))
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# Commands to format a DocBook <refentry> document into a manual page
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DOCBOOKTOMAN=$(strip cd $(dir $<); xsltproc --nonet --xinclude \
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                --expression='s/\(mandos_\)[0-9.]\+\(\.orig\.tar\.gz\)/\1$(version)\2/' \
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                $@)
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# Need to add the GnuTLS, Avahi and GPGME libraries, and can't use
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# -fsanitize=leak because GnuTLS and GPGME both leak memory.
 
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# Need to add the GnuTLS, Avahi and GPGME libraries
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plugins.d/mandos-client: plugins.d/mandos-client.c
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        $(CC) $(filter-out -fsanitize=leak,$(CFLAGS)) $(strip\
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        ) $(GNUTLS_CFLAGS) $(AVAHI_CFLAGS) $(GPGME_CFLAGS) $(strip\
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                ) $(CPPFLAGS) $(LDFLAGS) $(TARGET_ARCH) $^ $(strip\
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                ) -lrt $(GNUTLS_LIBS) $(AVAHI_LIBS) $(strip\
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                ) $(GPGME_LIBS) $(LOADLIBES) $(LDLIBS) -o $@
 
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        $(LINK.c) $^ $(GNUTLS_CFLAGS) $(AVAHI_CFLAGS) $(strip\
 
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                ) $(GPGME_CFLAGS) $(GNUTLS_LIBS) $(strip\
 
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                ) $(AVAHI_LIBS) $(GPGME_LIBS) $(LOADLIBES) $(strip\
 
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                ) $(LDLIBS) -o $@
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plugin-helpers/mandos-client-iprouteadddel: plugin-helpers/mandos-client-iprouteadddel.c
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        $(LINK.c) $(LIBNL3_CFLAGS) $^ $(LIBNL3_LIBS) $(strip\