2  * Copyright (c) 1988-1997
5  * Copyright (c) 1998-2012  Michael Richardson <mcr@tcpdump.org>
27 #include "netdissect-stdinc.h"
61 		return (-1);  in nd_init()
67 	 * XXX - should we just fail if this fails?  Some of the  in nd_init()
126 		return (-1);  in nd_load_smi_module()
133 	return (-1);  in nd_load_smi_module()
157 	ndspi->ndspi_buffer = new_buffer;  in nd_push_buffer()
158 	ndspi->ndspi_packetp = ndo->ndo_packetp;  in nd_push_buffer()
159 	ndspi->ndspi_snapend = ndo->ndo_snapend;  in nd_push_buffer()
160 	ndspi->ndspi_prev = ndo->ndo_packet_info_stack;  in nd_push_buffer()
162 	ndo->ndo_packetp = new_packetp;  in nd_push_buffer()
163 	ndo->ndo_snapend = new_packetp + newlen;  in nd_push_buffer()
164 	ndo->ndo_packet_info_stack = ndspi;  in nd_push_buffer()
176  *    given a pointer into the packet and a length past that point in
177  *    the packet, calculate a new snapshot end that's at the lower
178  *    of the current snapshot end and that point in the packet;
180  *    set the snapshot end to that new value.
191 	ndspi->ndspi_buffer = NULL;	/* no new buffer */  in nd_push_snaplen()
192 	ndspi->ndspi_packetp = ndo->ndo_packetp;  in nd_push_snaplen()
193 	ndspi->ndspi_snapend = ndo->ndo_snapend;  in nd_push_snaplen()
194 	ndspi->ndspi_prev = ndo->ndo_packet_info_stack;  in nd_push_snaplen()
199 	ndo->ndo_packet_info_stack = ndspi;  in nd_push_snaplen()
211 	snaplen_remaining = (u_int)(ndo->ndo_snapend - bp);  in nd_push_snaplen()
220 		ndo->ndo_snapend = bp + newlen;  in nd_push_snaplen()
229  *    given a pointer into the packet and a length past that point in
230  *    the packet, calculate a new snapshot end that's at the lower
231  *    of the previous snapshot end - or, if there is no previous
232  *    snapshot end, the current snapshot end - and that point in the
235  *    set the snapshot end to that new value.
237  * This is to change the current snapshot end.  This may increase the
238  * snapshot end, as it may be used, for example, for a Jumbo Payload
249 	ndspi = ndo->ndo_packet_info_stack;  in nd_change_snaplen()
250 	if (ndspi->ndspi_prev != NULL)  in nd_change_snaplen()
251 		previous_snapend = ndspi->ndspi_prev->ndspi_snapend;  in nd_change_snaplen()
253 		previous_snapend = ndo->ndo_snapend;  in nd_change_snaplen()
257 	 * snapend - or, if there is no previous snapend, after  in nd_change_snaplen()
267 	snaplen_remaining = (u_int)(previous_snapend - bp);  in nd_change_snaplen()
276 		ndo->ndo_snapend = bp + newlen;  in nd_change_snaplen()
285 	ndspi = ndo->ndo_packet_info_stack;  in nd_pop_packet_info()
286 	ndo->ndo_packetp = ndspi->ndspi_packetp;  in nd_pop_packet_info()
287 	ndo->ndo_snapend = ndspi->ndspi_snapend;  in nd_pop_packet_info()
288 	ndo->ndo_packet_info_stack = ndspi->ndspi_prev;  in nd_pop_packet_info()
290 	free(ndspi->ndspi_buffer);  in nd_pop_packet_info()
297 	while (ndo->ndo_packet_info_stack != NULL)  in nd_pop_all_packet_info()
304 	longjmp(ndo->ndo_early_end, ND_TRUNCATED);  in nd_trunc_longjmp()