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| 1 | /* vi: set sw=4 ts=4: */
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| 2 | /*
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| 3 | * Utility routines.
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| 4 | *
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| 5 | * create raw socket for icmp (IPv6 version) protocol test permission
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| 6 | * and drop root privileges if running setuid
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| 7 | *
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| 8 | */
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| 9 |
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| 10 | //#include <sys/types.h>
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| 11 | //#include <netdb.h>
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| 12 | //#include <sys/socket.h>
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| 13 | #include "libbb.h"
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| 14 |
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| 15 | #if ENABLE_FEATURE_IPV6
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| 16 | int create_icmp6_socket(void)
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| 17 | {
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| 18 | struct protoent *proto;
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| 19 | int sock;
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| 20 |
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| 21 | proto = getprotobyname("ipv6-icmp");
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| 22 | /* if getprotobyname failed, just silently force
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| 23 | * proto->p_proto to have the correct value for "ipv6-icmp" */
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| 24 | sock = socket(AF_INET6, SOCK_RAW,
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| 25 | (proto ? proto->p_proto : IPPROTO_ICMPV6));
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| 26 | if (sock < 0) {
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| 27 | if (errno == EPERM)
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| 28 | bb_error_msg_and_die(bb_msg_perm_denied_are_you_root);
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| 29 | bb_perror_msg_and_die(bb_msg_can_not_create_raw_socket);
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| 30 | }
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| 31 |
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| 32 | /* drop root privs if running setuid */
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| 33 | xsetuid(getuid());
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| 34 |
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| 35 | return sock;
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| 36 | }
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| 37 | #endif
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