/* * Copyright (c) 2003 Can Erkin Acar * * Permission to use, copy, modify, and distribute this software for any * purpose with or without fee is hereby granted, provided that the above * copyright notice and this permission notice appear in all copies. * * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */ #ifndef _PRIVSEP_H_ #define _PRIVSEP_H_ #include <pcap-int.h> #define TCPDUMP_MAGIC 0xa1b2c3d4 /* file ids used by priv_getlines */ #define FTAB_APPLETALK 0 #define FTAB_PFOSFP 1 enum cmd_types { PRIV_OPEN_BPF, /* open a bpf descriptor */ PRIV_OPEN_DUMP, /* open dump file for reading */ PRIV_OPEN_OUTPUT, /* open output file */ PRIV_SETFILTER, /* set a bpf read filter */ PRIV_GETHOSTBYADDR, /* resolve numeric address into hostname */ PRIV_ETHER_NTOHOST, /* translate ethernet address into host name */ PRIV_GETRPCBYNUMBER, /* translate rpc number into name */ PRIV_GETSERVENTRIES, /* get the service entries table */ PRIV_GETPROTOENTRIES, /* get the ip protocol entries table */ PRIV_LOCALTIME, /* return localtime */ PRIV_GETLINES, /* get lines from a file */ PRIV_INIT_DONE /* signal that the initialization is done */ }; struct ether_addr; /* Privilege separation */ int priv_init(int, char **); void priv_init_done(void); int setfilter(int, int, char *); int pcap_live(const char *, int, int, u_int); struct bpf_program *priv_pcap_setfilter(pcap_t *, int, u_int32_t); pcap_t *priv_pcap_live(const char *, int, int, int, char *, u_int); pcap_t *priv_pcap_offline(const char *, char *); size_t priv_gethostbyaddr(char *, size_t, int, char *, size_t); size_t priv_ether_ntohost(char *, size_t, struct ether_addr *); size_t priv_getrpcbynumber(int, char *, size_t); struct tm *priv_localtime(const time_t *); /* Start getting service entries */ void priv_getserventries(void); /* Retrieve a single service entry, should be called repeatedly after calling priv_getserventries() until it returns zero */ size_t priv_getserventry(char *, size_t, int *, char *, size_t); /* Start getting ip protocol entries */ void priv_getprotoentries(void); /* Retrieve a single protocol entry, should be called repeatedly after calling priv_getprotoentries() until it returns zero */ size_t priv_getprotoentry(char *, size_t, int *); /* Start getting lines from a file */ void priv_getlines(size_t); /* Retrieve a single line from a file, should be called repeatedly after calling priv_getlines() until it returns zero */ size_t priv_getline(char *, size_t); pcap_dumper_t *priv_pcap_dump_open(pcap_t *, char *); /* File descriptor send/recv */ void send_fd(int, int); int receive_fd(int); /* communications over the channel */ int may_read(int, void *, size_t); void must_read(int, void *, size_t); void must_write(int, const void *, size_t); size_t read_block(int, char *, size_t, const char *); size_t read_string(int, char *, size_t, const char *); void write_block(int, size_t, const char *); void write_command(int, int); void write_string(int, const char *); void write_zero(int); extern int priv_fd; #endif