Merge Generate af_names.h similar to cap_names.h

This adds a base_af_names.h file similar to base_cap_names.h to support newer address families in policy when built against older headers.

Fixes: https://gitlab.com/apparmor/apparmor/-/issues/195
MR: https://gitlab.com/apparmor/apparmor/-/merge_requests/808
Acked-by: John Johansen <john.johansen@canonical.com>

.gitignore

@@ -14,6 +14,7 @@ parser/po/*.mo
 parser/af_names.h
 parser/cap_names.h
 parser/generated_cap_names.h
+parser/generated_af_names.h
 parser/tst_lib
 parser/tst_misc
 parser/tst_regex

parser/Makefile

@@ -307,10 +307,18 @@ parser_version.h: Makefile
 # as well as the filtering that occurs for network protocols that
 # apparmor should not mediate.
 
-af_names.h: ../common/list_af_names.sh
+generated_af_names.h: ../common/list_af_names.sh
-	../common/list_af_names.sh | LC_ALL=C sed -n -e 's/[ \t]\?AF_MAX[ \t]\+[0-9]\+,//g'  -e 's/[ \t]\+\?AF_\([A-Z0-9_]\+\)[ \t]\+\([0-9]\+\),/#ifndef AF_\1\n#  define AF_\1 \2\n#endif\nAA_GEN_NET_ENT("\L\1", \UAF_\1)\n/pg' > $@
+	../common/list_af_names.sh > $@
-	../common/list_af_names.sh | LC_ALL=C sed -n -e 's/AF_MAX[ \t]\+\([0-9]\+\),\?.*/\n#define AA_AF_MAX \1\n/p' >> $@
+
-	# cat $@
+af_names.h: generated_af_names.h base_af_names.h
+	cat base_af_names.h | diff -u - generated_af_names.h | grep -v '^.AF_MAX' | grep '^\+[^+]' ; \
+	if [ $$? -eq 1 ] ; then \
+		cat base_af_names.h | LC_ALL=C sed -n -e 's/[ \t]\?AF_MAX[ \t]\+[0-9]\+,//g'  -e 's/[ \t]\+\?AF_\([A-Z0-9_]\+\)[ \t]\+\([0-9]\+\),/#ifndef AF_\1\n#  define AF_\1 \2\n#endif\nAA_GEN_NET_ENT("\L\1", \UAF_\1)\n/pg' > $@ ; \
+		cat base_af_names.h | LC_ALL=C sed -n -e 's/AF_MAX[ \t]\+\([0-9]\+\),\?.*/\n#define AA_AF_MAX \1\n/p' >> $@ ; \
+	else \
+		echo "Error: new AF names detected; please update base_af_names.h with values from generated_af_names.h" ; \
+		exit 1 ; \
+	fi
 
 generated_cap_names.h: /usr/include/linux/capability.h
 	../common/list_capabilities.sh | LC_ALL=C sed -n -e "s/[ \\t]\\?CAP_\\([A-Z0-9_]\\+\\)/\{\"\\L\\1\", \\UCAP_\\1, NO_BACKMAP_CAP, CAPFLAG_BASE_FEATURE\},\\n/pg" > $@
@@ -434,7 +442,7 @@ clean: pod_clean
 	rm -f $(YACC_C_FILES)
 	rm -f parser_version.h
 	rm -f $(NAME)*.tar.gz $(NAME)*.tgz
-	rm -f af_names.h
+	rm -f af_names.h generated_af_names.h
 	rm -f cap_names.h generated_cap_names.h
 	rm -rf techdoc.aux techdoc.out techdoc.log techdoc.pdf techdoc.toc techdoc.txt techdoc/
 	$(MAKE) -s -C $(AAREDIR) clean

parser/base_af_names.h

@@ -0,0 +1,45 @@
+AF_UNSPEC 0,
+AF_UNIX 1,
+AF_INET 2,
+AF_AX25 3,
+AF_IPX 4,
+AF_APPLETALK 5,
+AF_NETROM 6,
+AF_BRIDGE 7,
+AF_ATMPVC 8,
+AF_X25 9,
+AF_INET6 10,
+AF_ROSE 11,
+AF_NETBEUI 13,
+AF_SECURITY 14,
+AF_KEY 15,
+AF_NETLINK 16,
+AF_PACKET 17,
+AF_ASH 18,
+AF_ECONET 19,
+AF_ATMSVC 20,
+AF_RDS 21,
+AF_SNA 22,
+AF_IRDA 23,
+AF_PPPOX 24,
+AF_WANPIPE 25,
+AF_LLC 26,
+AF_IB 27,
+AF_MPLS 28,
+AF_CAN 29,
+AF_TIPC 30,
+AF_BLUETOOTH 31,
+AF_IUCV 32,
+AF_RXRPC 33,
+AF_ISDN 34,
+AF_PHONET 35,
+AF_IEEE802154 36,
+AF_CAIF 37,
+AF_ALG 38,
+AF_NFC 39,
+AF_VSOCK 40,
+AF_KCM 41,
+AF_QIPCRTR 42,
+AF_SMC 43,
+AF_XDP 44,
+AF_MAX 45,