[PATCH] Introduce virStringStripIPv6Brackets

[Ján Tomko <jtomko@xxxxxxxxxx>]

Helper function to strip the brackets from an IPv6 address.
Tested by viruritest.
---
 src/libvirt_private.syms |  1 +
 src/util/virstring.c     | 22 ++++++++++++++++++++++
 src/util/virstring.h     |  2 ++
 src/util/viruri.c        | 20 ++++----------------
 4 files changed, 29 insertions(+), 16 deletions(-)

diff --git a/src/libvirt_private.syms b/src/libvirt_private.syms
index d6265ac..c5397dd 100644
--- a/src/libvirt_private.syms
+++ b/src/libvirt_private.syms
@@ -2004,6 +2004,7 @@ virStringSortCompare;
 virStringSortRevCompare;
 virStringSplit;
 virStringSplitCount;
+virStringStripIPv6Brackets;
 virStrncpy;
 virStrndup;
 virStrToDouble;
diff --git a/src/util/virstring.c b/src/util/virstring.c
index 54c0b6f..0cb7f3f 100644
--- a/src/util/virstring.c
+++ b/src/util/virstring.c
@@ -929,3 +929,25 @@ virStringReplace(const char *haystack,
 
     return virBufferContentAndReset(&buf);
 }
+
+/**
+ * virStringStripIPv6Brackets:
+ * @str: the string to strip
+ *
+ * Modify the string in-place to remove the leading and closing brackets
+ * from an IPv6 address.
+ */
+void
+virStringStripIPv6Brackets(char *str)
+{
+    size_t len;
+
+    if (!str)
+        return;
+
+    len = strlen(str);
+    if (str[0] == '[' && str[len-1] == ']' && strchr(str, ':')) {
+        memmove(&str[0], &str[1], len - 2);
+        str[len - 2] = '\0';
+    }
+}
diff --git a/src/util/virstring.h b/src/util/virstring.h
index b82ef2a..40ebaeb 100644
--- a/src/util/virstring.h
+++ b/src/util/virstring.h
@@ -268,4 +268,6 @@ char *virStringReplace(const char *haystack,
                        const char *newneedle)
     ATTRIBUTE_NONNULL(1) ATTRIBUTE_NONNULL(2) ATTRIBUTE_NONNULL(3);
 
+void virStringStripIPv6Brackets(char *str);
+
 #endif /* __VIR_STRING_H__ */
diff --git a/src/util/viruri.c b/src/util/viruri.c
index 23d86c5..6166c37 100644
--- a/src/util/viruri.c
+++ b/src/util/viruri.c
@@ -182,22 +182,10 @@ virURIParse(const char *uri)
     if (VIR_STRDUP(ret->user, xmluri->user) < 0)
         goto error;
 
-    /* First check: does it even make sense to jump inside */
-    if (ret->server != NULL &&
-        ret->server[0] == '[') {
-        size_t length = strlen(ret->server);
-
-        /* We want to modify the server string only if there are
-         * square brackets on both ends and inside there is IPv6
-         * address. Otherwise we could make a mistake by modifying
-         * something other than an IPv6 address. */
-        if (ret->server[length - 1] == ']' && strchr(ret->server, ':')) {
-            memmove(&ret->server[0], &ret->server[1], length - 2);
-            ret->server[length - 2] = '\0';
-        }
-        /* Even after such modification, it is completely ok to free
-         * the uri with xmlFreeURI() */
-    }
+    /* Strip square bracket from an IPv6 address.
+     * The function modifies the string in-place. Even after such
+     * modification, it is OK to free the URI with xmlFreeURI. */
+    virStringStripIPv6Brackets(ret->server);
 
     if (virURIParseParams(ret) < 0)
         goto error;
-- 
2.0.4

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