Wild Card and IP Address

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Is there a way to refernce a nuber of IP address with a wildcar character? I want to run code on all IP addresses starting with 192.168. Would it be done like this?
192.168.*.*
Here is the code I'm trying to run. It's the first part that is giving trouble.

C++

if ((ipSrc == 192.168.*.*) || (ip_header->source_ip == sockAddr.sin_addr.s_addr))
			{
			printf("\n   Source      IP: %s", "0.0.0.0");
			printf("\n   Destination IP: %s", ipDest);

Tried this as well...No work.

C++

if ((ipSrc == "192.168.0.0" - "192.168.255.255") || (ip_header->source_ip == sockAddr.sin_addr.s_addr))
			{

ipSrc is a char

Posted 16-Sep-11 9:36am

Member 7766180

Updated 16-Sep-11 9:55am

v4

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2 solutions

Solution 1

The expressions in the above samples are not valid and will never work. You should compare individual values from IPAddresses to see if they are on the same subnet. Use the FIRST_IPADDRESS[^] and related macros to extract each field.

Posted 16-Sep-11 10:03am

Richard MacCutchan

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Member 7766180 16-Sep-11 16:13pm

Thank you.

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lewax00 · Accepted Answer · 2011-09-16T10:07:00

Solution 2

C++

if ((strncmp("192.168", ipSrc, 7) == 0) || (ip_header->source_ip == sockAddr.sin_addr.s_addr))
			{
			printf("\n   Source      IP: %s", "0.0.0.0");
			printf("\n   Destination IP: %s", ipDest);

This may work, it just compares the first part of the IP address, (the 7 is the number of characters to compare, 192.168 is 7 characters long)

Posted 16-Sep-11 10:07am

lewax00

Comments

Member 7766180 16-Sep-11 16:12pm

Thank You, Works like a charm!!!!!!