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37 lines
850 B
C
37 lines
850 B
C
/* vi: set sw=4 ts=4: */
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/*
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* Utility routines.
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*
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* create raw socket for icmp protocol
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* and drop root privileges if running setuid
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*
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* Licensed under GPLv2, see file LICENSE in this tarball for details.
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*/
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#include "libbb.h"
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int FAST_FUNC create_icmp_socket(void)
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{
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int sock;
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#if 0
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struct protoent *proto;
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proto = getprotobyname("icmp");
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/* if getprotobyname failed, just silently force
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* proto->p_proto to have the correct value for "icmp" */
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sock = socket(AF_INET, SOCK_RAW,
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(proto ? proto->p_proto : 1)); /* 1 == ICMP */
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#else
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sock = socket(AF_INET, SOCK_RAW, 1); /* 1 == ICMP */
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#endif
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if (sock < 0) {
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if (errno == EPERM)
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bb_error_msg_and_die(bb_msg_perm_denied_are_you_root);
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bb_perror_msg_and_die(bb_msg_can_not_create_raw_socket);
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}
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/* drop root privs if running setuid */
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xsetuid(getuid());
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return sock;
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}
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