How To Monitor Network Activity From Within App?

Question

I'm trying to monitor network activity on my iPhone from within an app I'm developing. Does iOS support a netstat-like command or something similar that can tell me what what inbound and outbound connections are active ?

Answer 1

After some searching I found Apple's code used for netstat.

Everything you need in the void protopr(uint32_t proto, char *name, int af) function.

I tested on the device and sysctlbyname("net.inet.tcp.pcblist_n",...) works.

That should be all you need.

Answer 2

I can't test this but from what I gather you will have to use sysctl in combination with sysctlnametomib or alternatively sysctlbyname for this:

sysctlbyname("net.inet.tcp.pcblist", ...)

and/or

sysctlbyname("net.inet.udp.pcblist", ...)