Visit The New, Modern Unix Linux Community

Linux and UNIX Man Pages

Test Your Knowledge in Computers #73
Difficulty: Easy
BSD (Berkeley Software Distribution) is an open-source, Unix-like operating system.
True or False?
Linux & Unix Commands - Search Man Pages

pcap_geterr(3) [freebsd man page]

PCAP_GETERR(3)						     Library Functions Manual						    PCAP_GETERR(3)

NAME
pcap_geterr, pcap_perror - get or print libpcap error message text SYNOPSIS
#include <pcap/pcap.h> char *pcap_geterr(pcap_t *p); void pcap_perror(pcap_t *p, char *prefix); DESCRIPTION
pcap_geterr() returns the error text pertaining to the last pcap library error. NOTE: the pointer it returns will no longer point to a valid error message string after the pcap_t passed to it is closed; you must use or copy the string before closing the pcap_t. pcap_perror() prints the text of the last pcap library error on stderr, prefixed by prefix. SEE ALSO
pcap(3) 5 April 2008 PCAP_GETERR(3)

Check Out this Related Man Page

PCAP_LIST_DATALINKS(3PCAP)												PCAP_LIST_DATALINKS(3PCAP)

NAME
pcap_list_datalinks, pcap_free_datalinks - get a list of link-layer header types supported by a capture device, and free that list SYNOPSIS
#include <pcap/pcap.h> int pcap_list_datalinks(pcap_t *p, int **dlt_buf); void pcap_free_datalinks(int *dlt_list); DESCRIPTION
pcap_list_datalinks() is used to get a list of the supported link-layer header types of the interface associated with the pcap descriptor. pcap_list_datalinks() allocates an array to hold the list and sets *dlt_buf to point to that array. The caller is responsible for freeing the array with pcap_free_datalinks(), which frees the list of link-layer header types pointed to by dlt_list. RETURN VALUE
pcap_list_datalinks() returns the number of link-layer header types in the array on success and -1 on failure. If -1 is returned, pcap_geterr() or pcap_perror() may be called with p as an argument to fetch or display the error text. SEE ALSO
pcap(3PCAP), pcap_geterr(3PCAP), pcap_datalink_val_to_name(3PCAP), pcap-linktype(7) 22 August 2010 PCAP_LIST_DATALINKS(3PCAP)

3 More Discussions You Might Find Interesting

1. Programming

can some1 help me in Modifying sniffex.c

hi plz help me modifying the following code (use pcap) to include concepts of parallel programming or multi threading. I am trying from the past 1 week to change the code and apply concepts of threads but have been unsuccessful.. pls guide me.. /* This section contains additional information... (1 Reply)
Discussion started by: aka.bhagvanji
1 Replies

2. Programming

Modifying sniffex.c to include concepts of parallel programming or threads

HI For the past 1 week i have been trying to include the concepts of parallel programming or thread in the sniffex.c code. Haven't been able to.. Please suggest sm appropriate modifications to the following code: /* * sniffex.c * * Sniffer example of TCP/IP packet capture using... (1 Reply)
Discussion started by: aka.bhagvanji
1 Replies

3. Programming

using libpcap with timeout

I want to write a small application using Libpcap in C on Linux. Currently, it starts to sniff and waits for the packets. But that's not what I need actually. I want it to wait for N seconds and then stop listening. (I think there's something wrong with my usage of 'pcap_open_live'...) How... (0 Replies)
Discussion started by: xyzt
0 Replies

Featured Tech Videos