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authorEric Andersen2001-07-12 20:26:32 +0000
committerEric Andersen2001-07-12 20:26:32 +0000
commit7467c8d3b6a50e2cbd8db750963d40b420ad38d1 (patch)
tree10dcece1e0bb88e35aa95c3a68896ad426e43f7a /libbb/create_icmp_socket.c
parentf69bfc76fa7acb0c87fa3f3b319fde361a8315a8 (diff)
downloadbusybox-7467c8d3b6a50e2cbd8db750963d40b420ad38d1.zip
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Patch from vodz:
Changed email address cmdedit API change optimizations for traceroute and md5sum added a new shared create_icmp_socket() function
Diffstat (limited to 'libbb/create_icmp_socket.c')
-rw-r--r--libbb/create_icmp_socket.c37
1 files changed, 37 insertions, 0 deletions
diff --git a/libbb/create_icmp_socket.c b/libbb/create_icmp_socket.c
new file mode 100644
index 0000000..d804b39
--- /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;
+}