File kdump-remove-IPv6-brackets-for-getaddrinfo.patch of Package kdump.21349

From: Michal Koutny <mkoutny@suse.com>
Date: Mon, 26 Mar 2018 20:43:40 +0200
Subject: Routable: do not pass bracketed IPv6 to getaddrinfo
References: bsc#1062026
Upstream: merged
Git-commit: ba186e82f9ea9b724fd48a1f119afb73b0063c12

It would be nicer to strip the brackets in URLParser and work with a
plain IPv6 as hostname. However, since we pass that value to callees
that expect bracketed form (e.g. NFS mount) we invert the convention and
keep the bracketed version and use bare IPv6 to feed getaddrinfo only.

---
 kdumptool/routable.cc |   11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

--- a/kdumptool/routable.cc
+++ b/kdumptool/routable.cc
@@ -33,6 +33,7 @@
 
 #include "global.h"
 #include "routable.h"
+#include "stringutil.h"
 #include "debug.h"
 
 //{{{ NetLink ------------------------------------------------------------------
@@ -459,8 +460,14 @@ bool Routable::resolve(void)
 {
     struct addrinfo hints;
     int res;
+    KString raw_host(m_host);
 
-    Debug::debug()->trace("resolve(%s)", m_host.c_str());
+    // remove IPv6 URL bracketing for getaddrinfo
+    if (raw_host.size() > 0 &&
+            raw_host[0] == '[' && raw_host[raw_host.size()-1] == ']')
+        raw_host = raw_host.substr(1, raw_host.size()-2);
+
+    Debug::debug()->trace("resolve(%s)", raw_host.c_str());
 
     if (m_ai)
 	freeaddrinfo(m_ai);
@@ -469,7 +476,7 @@ bool Routable::resolve(void)
     hints.ai_family = AF_UNSPEC;
     hints.ai_socktype = SOCK_RAW;
     do {
-	res = getaddrinfo(m_host.c_str(), NULL, &hints, &m_ai);
+	res = getaddrinfo(raw_host.c_str(), NULL, &hints, &m_ai);
     } while (res == EAI_AGAIN);
 
     if (res == 0)