Patch-Source: https://github.com/schweikert/fping/commit/e975a4339b24716fb57bed234b0a1176f2bf3451
--
Author: David Schweikert <david@schweikert.ch>
Committer: Nash Kaminski <Nash.Kaminski@ny.email.gs.com>
Summary: This patch backports the upstream bugfix from
         https://github.com/schweikert/fping/issues/248
         for a regression introduced in version 5.1 which
         prevents fping from functioning when run in an
         unprivileged container.
----
diff --git a/src/fping.c b/src/fping.c
index e26b216c..0bd2b70c 100644
--- a/src/fping.c
+++ b/src/fping.c
@@ -1104,11 +1104,11 @@ int main(int argc, char** argv)
         exit(num_noaddress ? 2 : 1);
     }

-    if (src_addr_set && socket4 >= 0) {
+    if (socket4 >= 0 && (src_addr_set || socktype4 == SOCK_DGRAM)) {
         socket_set_src_addr_ipv4(socket4, &src_addr, (socktype4 == SOCK_DGRAM) ? &ident4 : NULL);
     }
 #ifdef IPV6
-    if (src_addr6_set && socket6 >= 0) {
+    if (socket6 >= 0 && (src_addr6_set || socktype4 == SOCK_DGRAM)) {
         socket_set_src_addr_ipv6(socket6, &src_addr6, (socktype6 == SOCK_DGRAM) ? &ident6 : NULL);
     }
 #endif