14.1+15.1: Support wildcards in cached hosts file

Signed-off-by: Tad <tad@spotco.us>

Patches/Common/android_bionic/0001-Wildcard_Hosts.patch

@@ -0,0 +1,69 @@
+From 8604fcb3686a74d8f2a0632027525486febd45a4 Mon Sep 17 00:00:00 2001
+From: Tom Marshall <tdm.code@gmail.com>
+Date: Thu, 16 Jan 2020 13:07:04 -0800
+Subject: [PATCH] bionic: Support wildcards in cached hosts file
+
+If an exact name is not found in the hosts file and the host name
+contains at least one dot, search for entries of the form "*.domain",
+where domain is the portion of the host name after the first dot.  If
+that is not found, repeat using the domain.
+
+Example: a.b.c.example.com would search for the following in turn:
+	a.b.c.example.com
+	*.b.c.example.com
+	*.c.example.com
+	*.example.com
+	*.com
+
+Change-Id: I4b0bb81699151d5b371850daebf785e35ec9b180
+---
+ libc/dns/net/hosts_cache.c | 29 ++++++++++++++++++++++++++++-
+ 1 file changed, 28 insertions(+), 1 deletion(-)
+
+diff --git a/libc/dns/net/hosts_cache.c b/libc/dns/net/hosts_cache.c
+index deafb78b73..5038986be6 100644
+--- a/libc/dns/net/hosts_cache.c
++++ b/libc/dns/net/hosts_cache.c
+@@ -121,7 +121,7 @@ static int cmp_hcent_name(const void *a, const void *b)
+ 	return hstrcmp(na, nb);
+ }
+ 
+-static struct hcent *_hcfindname(const char *name)
++static struct hcent *_hcfindname_exact(const char *name)
+ {
+ 	size_t first, last, mid;
+ 	struct hcent *cur = NULL;
+@@ -162,6 +162,33 @@ static struct hcent *_hcfindname(const char *name)
+ 	return cur;
+ }
+ 
++static struct hcent *_hcfindname(const char *name)
++{
++	struct hcent *ent;
++	char namebuf[MAX_HOSTLEN];
++	char *p;
++	char *dot;
++
++	ent = _hcfindname_exact(name);
++	if (!ent && strlen(name) < sizeof(namebuf)) {
++		strcpy(namebuf, name);
++		p = namebuf;
++		do {
++			dot = strchr(p, '.');
++			if (!dot)
++				break;
++			if (dot > p) {
++				*(dot - 1) = '*';
++				ent = _hcfindname_exact(dot - 1);
++			}
++			p = dot + 1;
++		}
++		while (!ent);
++	}
++
++	return ent;
++}
++
+ /*
+  * Find next name on line, if any.
+  *

Scripts/LineageOS-14.1/Patch.sh

@@ -54,6 +54,10 @@ gpgVerifyDirectory "$DOS_PREBUILT_APPS""android_vendor_FDroid_PrebuiltApps/packa
 cp -r "$DOS_PREBUILT_APPS""android_vendor_FDroid_PrebuiltApps/." "$DOS_BUILD_BASE""vendor/fdroid_prebuilt/"; #Add the prebuilt apps
 cp -r "$DOS_PATCHES_COMMON""android_vendor_divested/." "$DOS_BUILD_BASE""vendor/divested/"; #Add our vendor files
 
+if enterAndClear "bionic"; then
+patch -p1 < "$DOS_PATCHES_COMMON/android_bionic/0001-Wildcard_Hosts.patch"; #Support wildcards in cached hosts file (backport from 16.0+)
+fi;
+
 if enterAndClear "bootable/recovery"; then
 git revert --no-edit 3c0d796b79c7a1ee904e0cef7c0f2e20bf84c237; #Remove sideload cache, breaks with large files
 patch -p1 < "$DOS_PATCHES/android_bootable_recovery/0001-Squash_Menus.patch"; #What's a back button?

Scripts/LineageOS-15.1/Patch.sh

@@ -51,6 +51,10 @@ gpgVerifyDirectory "$DOS_PREBUILT_APPS""android_vendor_FDroid_PrebuiltApps/packa
 cp -r "$DOS_PREBUILT_APPS""android_vendor_FDroid_PrebuiltApps/." "$DOS_BUILD_BASE""vendor/fdroid_prebuilt/"; #Add the prebuilt apps
 cp -r "$DOS_PATCHES_COMMON""android_vendor_divested/." "$DOS_BUILD_BASE""vendor/divested/"; #Add our vendor files
 
+if enterAndClear "bionic"; then
+patch -p1 < "$DOS_PATCHES_COMMON/android_bionic/0001-Wildcard_Hosts.patch"; #Support wildcards in cached hosts file (backport from 16.0+)
+fi;
+
 if enterAndClear "bootable/recovery"; then
 git revert --no-edit eb98fde70a6e54a25408eb8c626caecf7841c5df; #Remove sideload cache, breaks with large files
 git revert --no-edit ac258a4f4c4b4b91640cc477ad1ac125f206db02; #Resurrect dm-verity