From 7baffca714b6264cd5cfd05c314a59aeea938f8f Mon Sep 17 00:00:00 2001
From: andersen <andersen@69ca8d6d-28ef-0310-b511-8ec308f3f277>
Date: Thu, 12 Jul 2001 20:26:32 +0000
Subject: Patch from vodz:     Changed email address     cmdedit API change    
 optimizations for traceroute and md5sum     added a new shared
 create_icmp_socket() function

git-svn-id: svn://busybox.net/trunk/busybox@3078 69ca8d6d-28ef-0310-b511-8ec308f3f277
---
 libbb/create_icmp_socket.c | 37 +++++++++++++++++++++++++++++++++++++
 1 file changed, 37 insertions(+)
 create mode 100644 libbb/create_icmp_socket.c

(limited to 'libbb/create_icmp_socket.c')

diff --git a/libbb/create_icmp_socket.c b/libbb/create_icmp_socket.c
new file mode 100644
index 000000000..d804b3987
--- /dev/null
+++ b/libbb/create_icmp_socket.c
@@ -0,0 +1,37 @@
+/* vi: set sw=4 ts=4: */
+/*
+ * Utility routines.
+ *
+ * create raw socket for icmp protocol test permision
+ * and drop root privilegies if running setuid
+ *
+ */
+
+#include <sys/types.h>
+#include <netdb.h>
+#include <sys/socket.h>
+#include <errno.h>
+#include <unistd.h>
+#include "libbb.h"
+
+int create_icmp_socket(void)
+{
+	struct protoent *proto;
+	int sock;
+
+	proto = getprotobyname("icmp");
+	/* if getprotobyname failed, just silently force
+	 * proto->p_proto to have the correct value for "icmp" */
+	if ((sock = socket(AF_INET, SOCK_RAW,
+			(proto ? proto->p_proto : 1))) < 0) {        /* 1 == ICMP */
+		if (errno == EPERM)
+			error_msg_and_die("permission denied. (are you root?)");
+		else
+			perror_msg_and_die(can_not_create_raw_socket);
+	}
+
+	/* drop root privs if running setuid */
+	setuid(getuid());
+
+	return sock;
+}
-- 
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