From ac878566eb935fd3ebfb804e6bd9e1690d4a65e3 Mon Sep 17 00:00:00 2001
From: Tollef Fog Heen <tfheen@err.no>
Date: Tue, 20 Mar 2018 22:40:32 +0100
Subject: [PATCH] Open raw sockets when adding hosts, not when doing the
 pinging

This allows this to run as non-root again, without this, oping will
have dropped privileges before trying to ping, which then fails to
open the necessary raw sockets.

Fixes: #34

[Upstream: https://github.com/octo/liboping/pull/35/commits/a88c51f38dafa1fba9118045176754bec05d3c94]
Signed-off-by: Peter Seiderer <ps.report@gmx.net>
---
 src/liboping.c | 48 +++++++++++++++++-------------------------------
 1 file changed, 17 insertions(+), 31 deletions(-)

diff --git a/src/liboping.c b/src/liboping.c
index 39b0041..f98e810 100644
--- a/src/liboping.c
+++ b/src/liboping.c
@@ -1344,41 +1344,10 @@ int ping_send (pingobj_t *obj)
 	struct timeval nowtime;
 	struct timeval timeout;
 
-	_Bool need_ipv4_socket = 0;
-	_Bool need_ipv6_socket = 0;
-
 	for (ptr = obj->head; ptr != NULL; ptr = ptr->next)
 	{
 		ptr->latency  = -1.0;
 		ptr->recv_ttl = -1;
-
-		if (ptr->addrfamily == AF_INET)
-			need_ipv4_socket = 1;
-		else if (ptr->addrfamily == AF_INET6)
-			need_ipv6_socket = 1;
-	}
-
-	if (!need_ipv4_socket && !need_ipv6_socket)
-	{
-		ping_set_error (obj, "ping_send", "No hosts to ping");
-		return (-1);
-	}
-
-	if (need_ipv4_socket && obj->fd4 == -1)
-	{
-		obj->fd4 = ping_open_socket(obj, AF_INET);
-		if (obj->fd4 == -1)
-			return (-1);
-		ping_set_ttl (obj, obj->ttl);
-		ping_set_qos (obj, obj->qos);
-	}
-	if (need_ipv6_socket && obj->fd6 == -1)
-	{
-		obj->fd6 = ping_open_socket(obj, AF_INET6);
-		if (obj->fd6 == -1)
-			return (-1);
-		ping_set_ttl (obj, obj->ttl);
-		ping_set_qos (obj, obj->qos);
 	}
 
 	if (gettimeofday (&nowtime, NULL) == -1)
@@ -1698,6 +1667,23 @@ int ping_host_add (pingobj_t *obj, const char *host)
 	ph->table_next = obj->table[ph->ident % PING_TABLE_LEN];
 	obj->table[ph->ident % PING_TABLE_LEN] = ph;
 
+	if (ph->addrfamily == AF_INET && obj->fd4 == -1)
+	{
+		obj->fd4 = ping_open_socket(obj, AF_INET);
+		if (obj->fd4 == -1)
+			return (-1);
+		ping_set_ttl (obj, obj->ttl);
+		ping_set_qos (obj, obj->qos);
+	}
+	if (ph->addrfamily == AF_INET6 && obj->fd6 == -1)
+	{
+		obj->fd6 = ping_open_socket(obj, AF_INET6);
+		if (obj->fd6 == -1)
+			return (-1);
+		ping_set_ttl (obj, obj->ttl);
+		ping_set_qos (obj, obj->qos);
+	}
+
 	return (0);
 } /* int ping_host_add */
 
-- 
2.25.1