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14 * must display the following acknowledgement:
15 * This product includes software developed by the Computer Systems
16 * Engineering Group at Lawrence Berkeley Laboratory.
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34 * @(#) $Header: /tcpdump/master/libpcap/pcap-int.h,v 1.68.2.2 2005/05/03 18:54:36 guy Exp $ (LBL)
68 swapped_type_t lengths_swapped;
75 struct pcap_stat stat;
77 int use_bpf; /* using kernel filter */
78 u_long TotPkts; /* can't oflow for 79 hrs on ether */
79 u_long TotAccepted; /* count accepted by filter */
80 u_long TotDrops; /* count of dropped packets */
81 long TotMissed; /* missed by i/f during this run */
82 long OrigMissed; /* missed by i/f before this run */
83 char *device; /* device name */
85 int sock_packet; /* using Linux 2.0 compatible interface */
86 int timeout; /* timeout specified to pcap_open_live */
87 int clear_promisc; /* must clear promiscuous mode when we close */
88 int cooked; /* using SOCK_DGRAM rather than SOCK_RAW */
89 int ifindex; /* interface index of device we're bound to */
90 int lo_ifindex; /* interface index of the loopback device */
91 struct pcap *next; /* list of open promiscuous sock_packet pcaps */
95 void *dag_mem_base; /* DAG card memory base address */
96 u_int dag_mem_bottom; /* DAG card current memory bottom pointer */
97 u_int dag_mem_top; /* DAG card current memory top pointer */
98 int dag_fcs_bits; /* Number of checksum bits from link layer */
99 int dag_offset_flags; /* Flags to pass to dag_offset(). */
104 * Ultrix, DEC OSF/1^H^H^H^H^H^H^H^H^HDigital UNIX^H^H^H^H^H^H^H^H^H^H^H^H
105 * Tru64 UNIX, and NetBSD pad to make everything line up on a nice boundary.
107 #if defined(ultrix) || defined(__osf__) || (defined(__NetBSD__) && __NetBSD_Version__ > 106000000)
108 #define PCAP_FDDIPAD 3
124 int tzoff; /* timezone offset */
125 int offset; /* offset for proper alignment */
127 int break_loop; /* flag set to force break from packet-reading loop */
134 int inter_packet_wait; /* offline: wait between packets */
135 void (*wait_proc)(void); /* call proc while waiting */
150 * Place holder for pcap_next().
154 /* We're accepting only packets in this direction/these directions. */
155 direction_t direction;
160 int (*read_op)(pcap_t *, int cnt, pcap_handler, u_char *);
161 int (*inject_op)(pcap_t *, const void *, size_t);
162 int (*setfilter_op)(pcap_t *, struct bpf_program *);
163 int (*setdirection_op)(pcap_t *, direction_t);
164 int (*set_datalink_op)(pcap_t *, int);
165 int (*getnonblock_op)(pcap_t *, char *);
166 int (*setnonblock_op)(pcap_t *, int, char *);
167 int (*stats_op)(pcap_t *, struct pcap_stat *);
168 void (*close_op)(pcap_t *);
171 * Placeholder for filter code if bpf not in kernel.
173 struct bpf_program fcode;
175 char errbuf[PCAP_ERRBUF_SIZE + 1];
179 struct pcap_pkthdr pcap_header; /* This is needed for the pcap_next_ex() to work */
183 * This is a timeval as stored in disk in a dumpfile.
184 * It has to use the same types everywhere, independent of the actual
188 struct pcap_timeval {
189 bpf_int32 tv_sec; /* seconds */
190 bpf_int32 tv_usec; /* microseconds */
194 * How a `pcap_pkthdr' is actually stored in the dumpfile.
196 * Do not change the format of this structure, in any way (this includes
197 * changes that only affect the length of fields in this structure),
198 * and do not make the time stamp anything other than seconds and
199 * microseconds (e.g., seconds and nanoseconds). Instead:
201 * introduce a new structure for the new format;
203 * send mail to "tcpdump-workers@tcpdump.org", requesting a new
204 * magic number for your new capture file format, and, when
205 * you get the new magic number, put it in "savefile.c";
207 * use that magic number for save files with the changed record
210 * make the code in "savefile.c" capable of reading files with
211 * the old record header as well as files with the new record header
212 * (using the magic number to determine the header format).
214 * Then supply the changes to "patches@tcpdump.org", so that future
215 * versions of libpcap and programs that use it (such as tcpdump) will
216 * be able to read your new capture file format.
219 struct pcap_sf_pkthdr {
220 struct pcap_timeval ts; /* time stamp */
221 bpf_u_int32 caplen; /* length of portion present */
222 bpf_u_int32 len; /* length this packet (off wire) */
226 * How a `pcap_pkthdr' is actually stored in dumpfiles written
227 * by some patched versions of libpcap (e.g. the ones in Red
228 * Hat Linux 6.1 and 6.2).
230 * Do not change the format of this structure, in any way (this includes
231 * changes that only affect the length of fields in this structure).
232 * Instead, introduce a new structure, as per the above.
235 struct pcap_sf_patched_pkthdr {
236 struct pcap_timeval ts; /* time stamp */
237 bpf_u_int32 caplen; /* length of portion present */
238 bpf_u_int32 len; /* length this packet (off wire) */
240 unsigned short protocol;
241 unsigned char pkt_type;
247 #define min(a, b) ((a) > (b) ? (b) : (a))
250 /* XXX should these be in pcap.h? */
251 int pcap_offline_read(pcap_t *, int, pcap_handler, u_char *);
252 int pcap_read(pcap_t *, int cnt, pcap_handler, u_char *);
255 #define strlcpy(x, y, z) \
256 (strncpy((x), (y), (z)), \
257 ((z) <= 0 ? 0 : ((x)[(z) - 1] = '\0')), \
264 * Routines that most pcap implementations can use for non-blocking mode.
266 #if !defined(WIN32) && !defined(MSDOS)
267 int pcap_getnonblock_fd(pcap_t *, char *);
268 int pcap_setnonblock_fd(pcap_t *p, int, char *);
271 void pcap_close_common(pcap_t *);
274 * Internal interfaces for "pcap_findalldevs()".
276 * "pcap_platform_finddevs()" is a platform-dependent routine to
277 * add devices not found by the "standard" mechanisms (SIOCGIFCONF,
278 * "getifaddrs()", etc..
280 * "pcap_add_if()" adds an interface to the list of interfaces.
282 int pcap_platform_finddevs(pcap_if_t **, char *);
283 int add_addr_to_iflist(pcap_if_t **, const char *, u_int, struct sockaddr *,
284 size_t, struct sockaddr *, size_t, struct sockaddr *, size_t,
285 struct sockaddr *, size_t, char *);
286 int pcap_add_if(pcap_if_t **, const char *, u_int, const char *, char *);
287 struct sockaddr *dup_sockaddr(struct sockaddr *, size_t);
288 int add_or_find_if(pcap_if_t **, pcap_if_t **, const char *, u_int,
289 const char *, char *);
292 char *pcap_win32strerror(void);
295 int install_bpf_program(pcap_t *, struct bpf_program *);
297 int pcap_strcasecmp(const char *, const char *);