From 1498c2fc3d0a9b72232e7aee2d973f15e82cb5b4 Mon Sep 17 00:00:00 2001
From: Rob Landley <rob@landley.net>
Date: Tue, 30 Jan 2018 18:44:58 -0600
Subject: Basic ping support. Requires echo 0 $((1<<30)) >
 /proc/sys/net/ipv4/ping_group_range (as root)

---
 lib/lib.h |  1 +
 lib/net.c | 13 +++++++++++++
 2 files changed, 14 insertions(+)

diff --git a/lib/lib.h b/lib/lib.h
index 94662983..939d6127 100644
--- a/lib/lib.h
+++ b/lib/lib.h
@@ -294,6 +294,7 @@ struct addrinfo *xgetaddrinfo(char *host, char *port, int family, int socktype,
 int xconnect(struct addrinfo *ai_arg);
 int xpoll(struct pollfd *fds, int nfds, int timeout);
 int pollinate(int in1, int in2, int out1, int out2, int timeout, int shutdown_timeout);
+char *ntop(struct sockaddr *sa);
 
 // password.c
 int get_salt(char *salt, char * algo);
diff --git a/lib/net.c b/lib/net.c
index 5c6d4f7c..846be31f 100644
--- a/lib/net.c
+++ b/lib/net.c
@@ -102,3 +102,16 @@ int pollinate(int in1, int in2, int out1, int out2, int timeout, int shutdown_ti
     }
   }
 }
+
+// Return converted numeric address in libbuf
+char *ntop(struct sockaddr *sa)
+{
+  void *addr;
+
+  if (sa->sa_family == AF_INET) addr = &((struct sockaddr_in *)sa)->sin_addr;
+  else addr = &((struct sockaddr_in6 *)sa)->sin6_addr;
+
+  inet_ntop(sa->sa_family, addr, libbuf, sizeof(libbuf));
+
+  return libbuf;
+}
-- 
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