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15 * This product includes software developed by the Computer Systems
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34 * @(#) $Header: /tcpdump/master/libpcap/pcap-int.h,v 1.32 2000/12/21 10:29:23 guy Exp $ (LBL)
59 struct pcap_stat stat;
61 int use_bpf; /* using kernel filter */
62 u_long TotPkts; /* can't oflow for 79 hrs on ether */
63 u_long TotAccepted; /* count accepted by filter */
64 u_long TotDrops; /* count of dropped packets */
65 long TotMissed; /* missed by i/f during this run */
66 long OrigMissed; /* missed by i/f before this run */
68 int sock_packet; /* using Linux 2.0 compatible interface */
69 int readlen; /* byte count to hand to "recvmsg()" */
70 int timeout; /* timeout specified to pcap_open_live */
71 int clear_promisc; /* must clear promiscuous mode when we close */
72 int cooked; /* using SOCK_DGRAM rather than SOCK_RAW */
73 int lo_ifindex; /* interface index of the loopback device */
74 char *device; /* device name */
75 struct pcap *next; /* list of open promiscuous sock_packet pcaps */
83 int tzoff; /* timezone offset */
84 int offset; /* offset for proper alignment */
98 * Place holder for pcap_next().
104 * Placeholder for filter code if bpf not in kernel.
106 struct bpf_program fcode;
108 char errbuf[PCAP_ERRBUF_SIZE];
112 * This is a timeval as stored in disk in a dumpfile.
113 * It has to use the same types everywhere, independent of the actual
117 struct pcap_timeval {
118 bpf_int32 tv_sec; /* seconds */
119 bpf_int32 tv_usec; /* microseconds */
123 * How a `pcap_pkthdr' is actually stored in the dumpfile.
125 * Do not change the format of this structure, in any way (this includes
126 * changes that only affect the length of fields in this structure),
127 * and do not make the time stamp anything other than seconds and
128 * microseconds (e.g., seconds and nanoseconds). Instead:
130 * introduce a new structure for the new format;
132 * send mail to "tcpdump-workers@tcpdump.org", requesting a new
133 * magic number for your new capture file format, and, when
134 * you get the new magic number, put it in "savefile.c";
136 * use that magic number for save files with the changed record
139 * make the code in "savefile.c" capable of reading files with
140 * the old record header as well as files with the new record header
141 * (using the magic number to determine the header format).
143 * Then supply the changes to "patches@tcpdump.org", so that future
144 * versions of libpcap and programs that use it (such as tcpdump) will
145 * be able to read your new capture file format.
148 struct pcap_sf_pkthdr {
149 struct pcap_timeval ts; /* time stamp */
150 bpf_u_int32 caplen; /* length of portion present */
151 bpf_u_int32 len; /* length this packet (off wire) */
155 * How a `pcap_pkthdr' is actually stored in dumpfiles written
156 * by some patched versions of libpcap (e.g. the ones in Red
157 * Hat Linux 6.1 and 6.2).
159 * Do not change the format of this structure, in any way (this includes
160 * changes that only affect the length of fields in this structure).
161 * Instead, introduce a new structure, as per the above.
164 struct pcap_sf_patched_pkthdr {
165 struct pcap_timeval ts; /* time stamp */
166 bpf_u_int32 caplen; /* length of portion present */
167 bpf_u_int32 len; /* length this packet (off wire) */
169 unsigned short protocol;
170 unsigned char pkt_type;
176 #define min(a, b) ((a) > (b) ? (b) : (a))
179 /* XXX should these be in pcap.h? */
180 int pcap_offline_read(pcap_t *, int, pcap_handler, u_char *);
181 int pcap_read(pcap_t *, int cnt, pcap_handler, u_char *);
184 * 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
185 * Tru64 UNIX, and NetBSD pad to make everything line up on a nice boundary.
187 #if defined(ultrix) || defined(__osf__) || defined(__NetBSD__)
188 #define PCAP_FDDIPAD 3
192 #define strlcpy(x, y, z) \
193 (strncpy((x), (y), (z)), \
194 ((z) <= 0 ? 0 : ((x)[(z) - 1] = '\0')), \
199 void pcap_close_linux(pcap_t *);
203 extern int pcap_fddipad;
205 int install_bpf_program(pcap_t *, struct bpf_program *);