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73 lines
2.5 KiB
73 lines
2.5 KiB
.\" Copyright (c) 1994, 1996, 1997 |
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.\" The Regents of the University of California. All rights reserved. |
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.\" |
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.\" Redistribution and use in source and binary forms, with or without |
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.\" modification, are permitted provided that: (1) source code distributions |
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.\" retain the above copyright notice and this paragraph in its entirety, (2) |
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.\" distributions including binary code include the above copyright notice and |
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.\" this paragraph in its entirety in the documentation or other materials |
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.\" provided with the distribution, and (3) all advertising materials mentioning |
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.\" features or use of this software display the following acknowledgement: |
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.\" ``This product includes software developed by the University of California, |
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.\" Lawrence Berkeley Laboratory and its contributors.'' Neither the name of |
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.\" the University nor the names of its contributors may be used to endorse |
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.\" or promote products derived from this software without specific prior |
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.\" written permission. |
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.\" THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED |
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.\" WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF |
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.\" MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. |
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.\" |
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.TH PCAP_LIST_DATALINKS 3PCAP "8 March 2015" |
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.SH NAME |
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pcap_list_datalinks, pcap_free_datalinks \- get a list of link-layer header |
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types supported by a capture device, and free that list |
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.SH SYNOPSIS |
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.nf |
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.ft B |
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#include <pcap/pcap.h> |
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.ft |
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.LP |
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.ft B |
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int pcap_list_datalinks(pcap_t *p, int **dlt_buf); |
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void pcap_free_datalinks(int *dlt_list); |
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.ft |
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.fi |
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.SH DESCRIPTION |
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.B pcap_list_datalinks() |
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is used to get a list of the supported link-layer header types of the |
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interface associated with the pcap descriptor. |
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.B pcap_list_datalinks() |
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allocates an array to hold the list and sets |
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.IR *dlt_buf |
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to point to that array. |
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.LP |
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The caller is responsible for freeing the array with |
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.BR pcap_free_datalinks() , |
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which frees the list of link-layer header types pointed to by |
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.IR dlt_list . |
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.LP |
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It must not be called on a pcap descriptor created by |
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.B pcap_create() |
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that has not yet been activated by |
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.BR pcap_activate() . |
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.SH RETURN VALUE |
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.B pcap_list_datalinks() |
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returns the number of link-layer header types in the array on success, |
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.B PCAP_ERROR_NOT_ACTIVATED |
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if called on a capture handle that has been created but not activated, |
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and |
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.B PCAP_ERROR |
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(\-1) on other errors. |
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If |
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.B PCAP_ERROR |
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is returned, |
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.B pcap_geterr() |
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or |
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.B pcap_perror() |
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may be called with |
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.I p |
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as an argument to fetch or display the error text. |
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.SH SEE ALSO |
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pcap(3PCAP), pcap_geterr(3PCAP), |
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pcap_datalink_val_to_name(3PCAP), |
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pcap-linktype(@MAN_MISC_INFO@)
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