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ping: try SOCK_DGRAM if no root privileges

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Signed-off-by: Daniel Borca <dborca@yahoo.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Daniel Borca 2013-11-28 12:50:25 +01:00 committed by Denys Vlasenko
parent df0d2cd837
commit 72745632a1
1 changed files with 16 additions and 3 deletions
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19
networking/ping.c
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@ -168,9 +168,22 @@ create_icmp_socket(void)
#endif
sock = socket(AF_INET, SOCK_RAW, 1); /* 1 == ICMP */
if (sock < 0) {
if (errno == EPERM)
bb_error_msg_and_die(bb_msg_perm_denied_are_you_root);
bb_perror_msg_and_die(bb_msg_can_not_create_raw_socket);
if (errno != EPERM)
bb_perror_msg_and_die(bb_msg_can_not_create_raw_socket);
#if defined(__linux__) || defined(__APPLE__)
/* We don't have root privileges. Try SOCK_DGRAM instead.
* Linux needs net.ipv4.ping_group_range for this to work.
* MacOSX allows ICMP_ECHO, ICMP_TSTAMP or ICMP_MASKREQ
*/
#if ENABLE_PING6
if (lsa->u.sa.sa_family == AF_INET6)
sock = socket(AF_INET6, SOCK_DGRAM, IPPROTO_ICMPV6);
else
#endif
sock = socket(AF_INET, SOCK_DGRAM, 1); /* 1 == ICMP */
if (sock < 0)
#endif
bb_error_msg_and_die(bb_msg_perm_denied_are_you_root);
}
xmove_fd(sock, pingsock);