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-rw-r--r--networking/udhcp/common.c19
1 files changed, 19 insertions, 0 deletions
diff --git a/networking/udhcp/common.c b/networking/udhcp/common.c
index 2e6113627..a89dce3ae 100644
--- a/networking/udhcp/common.c
+++ b/networking/udhcp/common.c
@@ -539,3 +539,22 @@ int FAST_FUNC udhcp_str2optset(const char *const_str, void *arg)
return retval;
}
+
+/* note: ip is a pointer to an IPv6 in network order, possibly misaliged */
+int FAST_FUNC sprint_nip6(char *dest, /*const char *pre,*/ const uint8_t *ip)
+{
+ char hexstrbuf[16 * 2];
+ bin2hex(hexstrbuf, (void*)ip, 16);
+ return sprintf(dest, /* "%s" */
+ "%.4s:%.4s:%.4s:%.4s:%.4s:%.4s:%.4s:%.4s",
+ /* pre, */
+ hexstrbuf + 0 * 4,
+ hexstrbuf + 1 * 4,
+ hexstrbuf + 2 * 4,
+ hexstrbuf + 3 * 4,
+ hexstrbuf + 4 * 4,
+ hexstrbuf + 5 * 4,
+ hexstrbuf + 6 * 4,
+ hexstrbuf + 7 * 4
+ );
+}