source: MondoRescue/branches/stable/mindi-busybox/libbb/create_icmp_socket.c @ 821

Last change on this file since 821 was 821, checked in by Bruno Cornec, 14 years ago

Addition of busybox 1.2.1 as a mindi-busybox new package
This should avoid delivering binary files in mindi not built there (Fedora and Debian are quite serious about that)

File size: 827 bytes
Line 
1/* vi: set sw=4 ts=4: */
2/*
3 * Utility routines.
4 *
5 * create raw socket for icmp protocol test permission
6 * and drop root privileges if running setuid
7 *
8 */
9
10#include <sys/types.h>
11#include <netdb.h>
12#include <sys/socket.h>
13#include <errno.h>
14#include <unistd.h>
15#include "libbb.h"
16
17int create_icmp_socket(void)
18{
19    struct protoent *proto;
20    int sock;
21
22    proto = getprotobyname("icmp");
23    /* if getprotobyname failed, just silently force
24     * proto->p_proto to have the correct value for "icmp" */
25    if ((sock = socket(AF_INET, SOCK_RAW,
26            (proto ? proto->p_proto : 1))) < 0) {        /* 1 == ICMP */
27        if (errno == EPERM)
28            bb_error_msg_and_die(bb_msg_perm_denied_are_you_root);
29        else
30            bb_perror_msg_and_die(bb_msg_can_not_create_raw_socket);
31    }
32
33    /* drop root privs if running setuid */
34    setuid(getuid());
35
36    return sock;
37}
Note: See TracBrowser for help on using the repository browser.