chan_sip: Fix order of variables specified in SIPNotify action

Prior to this patch, sequential variables would be ordered in reverse
from the order specified in the manager action.

Review: https://reviewboard.asterisk.org/r/3588/
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Merged revisions 415359 from http://svn.asterisk.org/svn/asterisk/branches/1.8
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Merged revisions 415390 from http://svn.asterisk.org/svn/asterisk/branches/11
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Merged revisions 415410 from http://svn.asterisk.org/svn/asterisk/branches/12


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@415411 65c4cc65-6c06-0410-ace0-fbb531ad65f3

1 files changed, 24 insertions, 0 deletions

diff --git a/main/config.c b/main/config.c
index aee81e3ff..d9bef2e1b 100644
--- a/main/config.c
+++ b/main/config.c
@@ -562,6 +562,30 @@ struct ast_variable *ast_variables_dup(struct ast_variable *var)
 	return cloned;
 }
 
+struct ast_variable *ast_variables_reverse(struct ast_variable *var)
+{
+	struct ast_variable *var1, *var2;
+
+	var1 = var;
+
+	if (!var1 || !var1->next) {
+		return var1;
+	}
+
+	var2 = var1->next;
+	var1->next = NULL;
+
+	while (var2) {
+		struct ast_variable *next = var2->next;
+
+		var2->next = var1;
+		var1 = var2;
+		var2 = next;
+	}
+
+	return var1;
+}
+
 void ast_variables_destroy(struct ast_variable *v)
 {
 	struct ast_variable *vn;