123 static int pcap_next_packet(pcap_t *p, struct pcap_pkthdr *hdr, u_char **datap);
154 	struct pcap_file_header hdr;  in pcap_check_header()  local
183 	hdr.magic = magic;  in pcap_check_header()
184 	amt_read = fread(((char *)&hdr) + sizeof hdr.magic, 1,  in pcap_check_header()
185 	    sizeof(hdr) - sizeof(hdr.magic), fp);  in pcap_check_header()
186 	if (amt_read != sizeof(hdr) - sizeof(hdr.magic)) {  in pcap_check_header()
194 			    (unsigned long)sizeof(hdr),  in pcap_check_header()
205 		hdr.version_major = SWAPSHORT(hdr.version_major);  in pcap_check_header()
206 		hdr.version_minor = SWAPSHORT(hdr.version_minor);  in pcap_check_header()
207 		hdr.thiszone = SWAPLONG(hdr.thiszone);  in pcap_check_header()
208 		hdr.sigfigs = SWAPLONG(hdr.sigfigs);  in pcap_check_header()
209 		hdr.snaplen = SWAPLONG(hdr.snaplen);  in pcap_check_header()
210 		hdr.linktype = SWAPLONG(hdr.linktype);  in pcap_check_header()
213 	if (hdr.version_major < PCAP_VERSION_MAJOR) {  in pcap_check_header()
231 	p->version_major = hdr.version_major;  in pcap_check_header()
232 	p->version_minor = hdr.version_minor;  in pcap_check_header()
233 	p->tzoff = hdr.thiszone;  in pcap_check_header()
234 	p->snapshot = hdr.snaplen;  in pcap_check_header()
235 	p->linktype = linktype_to_dlt(LT_LINKTYPE(hdr.linktype));  in pcap_check_header()
236 	p->linktype_ext = LT_LINKTYPE_EXT(hdr.linktype);  in pcap_check_header()
302 	switch (hdr.version_major) {  in pcap_check_header()
305 		if (hdr.version_minor < 3)  in pcap_check_header()
307 		else if (hdr.version_minor == 3)  in pcap_check_header()
397 pcap_next_packet(pcap_t *p, struct pcap_pkthdr *hdr, u_char **data)  in pcap_next_packet()  argument
434 		hdr->caplen = SWAPLONG(sf_hdr.caplen);  in pcap_next_packet()
435 		hdr->len = SWAPLONG(sf_hdr.len);  in pcap_next_packet()
436 		hdr->ts.tv_sec = SWAPLONG(sf_hdr.ts.tv_sec);  in pcap_next_packet()
437 		hdr->ts.tv_usec = SWAPLONG(sf_hdr.ts.tv_usec);  in pcap_next_packet()
439 		hdr->caplen = sf_hdr.caplen;  in pcap_next_packet()
440 		hdr->len = sf_hdr.len;  in pcap_next_packet()
441 		hdr->ts.tv_sec = sf_hdr.ts.tv_sec;  in pcap_next_packet()
442 		hdr->ts.tv_usec = sf_hdr.ts.tv_usec;  in pcap_next_packet()
458 		hdr->ts.tv_usec = hdr->ts.tv_usec * 1000;  in pcap_next_packet()
466 		hdr->ts.tv_usec = hdr->ts.tv_usec / 1000;  in pcap_next_packet()
477 		if (hdr->caplen <= hdr->len) {  in pcap_next_packet()
487 		t = hdr->caplen;  in pcap_next_packet()
488 		hdr->caplen = hdr->len;  in pcap_next_packet()
489 		hdr->len = t;  in pcap_next_packet()
493 	if (hdr->caplen > p->bufsize) {  in pcap_next_packet()
503 		if (hdr->caplen > 65535) {  in pcap_next_packet()
509 		if (tsize < hdr->caplen) {  in pcap_next_packet()
510 			tsize = ((hdr->caplen + 1023) / 1024) * 1024;  in pcap_next_packet()
521 		amt_read = fread((char *)tp, 1, hdr->caplen, fp);  in pcap_next_packet()
522 		if (amt_read != hdr->caplen) {  in pcap_next_packet()
530 				    hdr->caplen, (unsigned long)amt_read);  in pcap_next_packet()
542 		hdr->caplen = p->bufsize;  in pcap_next_packet()
546 		amt_read = fread(p->buffer, 1, hdr->caplen, fp);  in pcap_next_packet()
547 		if (amt_read != hdr->caplen) {  in pcap_next_packet()
555 				    hdr->caplen, (unsigned long)amt_read);  in pcap_next_packet()
563 		swap_pseudo_headers(p->linktype, hdr, *data);  in pcap_next_packet()
571 	struct pcap_file_header hdr;  in sf_write_header()  local
573 …hdr.magic = p->opt.tstamp_precision == PCAP_TSTAMP_PRECISION_NANO ? NSEC_TCPDUMP_MAGIC : TCPDUMP_M…  in sf_write_header()
574 	hdr.version_major = PCAP_VERSION_MAJOR;  in sf_write_header()
575 	hdr.version_minor = PCAP_VERSION_MINOR;  in sf_write_header()
577 	hdr.thiszone = thiszone;  in sf_write_header()
578 	hdr.snaplen = snaplen;  in sf_write_header()
579 	hdr.sigfigs = 0;  in sf_write_header()
580 	hdr.linktype = linktype;  in sf_write_header()
582 	if (fwrite((char *)&hdr, sizeof(hdr), 1, fp) != 1)  in sf_write_header()