libpcap network packet capture function library

download
Compile and install
Instance

The C function interface provided by the library is used to capture data packets passing through the specified network interface.

download:
http://www.linuxfromscratch.org/blfs/view/svn/basicnet/libpcap.html

Install and compile:

tar -zxvf libpcap-1.9.1.tar.gz
./configure configuration
make compile
make install installation, the default directory /usr/local/
Copy the two directories /usr/local/lib and /usr/local/include to your own program directory, gcc -Wl,rpath=./lib -L./lib -I ./include

There may be an error, please check whether you have installed all the dependent packages bison, m4, GNU, flex and libpcap-dev:

#yum install bison
#yum install m4
#yum install flex

test.c:

#include <pcap.h>
#include <stdio.h>

int main()
{
  char errBuf[PCAP_ERRBUF_SIZE], * device;
  device = pcap_lookupdev(errBuf);
  if(device)
  {
    printf("success: device: %s\n", device);
  }
  else
  {
    printf("error: %s\n", errBuf);
  }
  return 0;
}

Makefile:

  1 CC = gcc
  2 OBJS = test.o
  3 CFLAGS = -Wl,-rpath=./lib -L./lib
  4 CFLAGS += -I./include
  5 LIBS = pcap
  6 DEST = test
  7 RM = rm -f
  8 
  9 $(DEST):$(OBJS)
 10         $(CC) -o $(DEST) $(OBJS) $(CFLAGS) $(addprefix -l, $(LIBS))
 11 clean:
 12         $(RM) $(DEST) $(OBJS)  
 13 
 14 #test: test.c
 15 #       gcc -o test test.c -lpcap -Wl,-rpath=./lib -L./lib -I./include
 16 #clean:
 17 #       rm -f test.o test

Run result: ./test

success: device: ens33

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