"struct rtentry" (in <net/if.h> on some systems, e.g. Digital UNIX 4.0,
there are prototypes for kernel functions that include "struct mbuf *"
and "struct rtentry *" arguments, and they are included even if you're
just user-mode code).
field, and make a PCAP_IF_LOOPBACK flag be the first flag bit in that
field, specifying whether the interface is a loopback interface; this
allows us to add more flags without changing the layout of the
structure.
"getifaddrs()"), after processing the list returned by SIOCGIFCONF, scan
"/proc/net/dev" for interface names, and add to the list of interfaces
entries for those interfaces, with no associated addresses (if the
interfaces were already added, with addresses, from the list returned by
SIOCGIFCONF, they won't get added again).
Clean up the error handling a bit.
whether we have "freeifaddrs()" (we don't check whether we have
"getifaddrs()", and if we have "getifaddrs()" but not "freeifaddrs()",
we're stuck with leaking memory).
Give the "any" device an instance number of INT_MAX, so it shows up
after all other non-loopback devices.
"getifaddrs()" sometimes appears to supply a destination address even
for non-point-to-point interfaces (it did so on a FreeBSD 4.1 system);
don't use the broadcast address it supplies if an interface isn't a
broadcast interface, and don't use the destination address it supplies
if an interface isn't a point-to-point interface.
If we had an error constructing the list of interfaces, don't attempt to
add the "any" device to the list.
Add a new "pcap_findalldevs()" routine to get a list of all
interfaces that can be opened with "pcap_open_live()", and a
"pcap_freealldevs()" routine to free the list.
Make "pcap_lookupdev()" use it, which also arranges that it will
not return a device that cannot be opened by "pcap_open_live()".
Allow the "any" device to be opened, on Linux, with "promisc"
non-zero; ignore the request for promiscuity, and return a
warning message indicating that promiscuous mode isn't supported
on the "any" device.
Document "pcap_findalldevs()" and "pcap_lookupdev()", and clean up some
items in the libpcap man page.
guy