mirror of
https://github.com/Divested-Mobile/DivestOS-Build.git
synced 2024-12-23 22:49:28 -05:00
70 lines
1.8 KiB
Diff
70 lines
1.8 KiB
Diff
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.
|
|
*
|