05-28-2008
netlink and libpcap
"libpcap" can provide you quickest implementation. "netlink" will be very much kernel centric. See tcpdump source code for generic/finer level implmentation.
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LEARN ABOUT OPENSOLARIS
net_routeto
net_routeto(9F) Kernel Functions for Drivers net_routeto(9F)
NAME
net_routeto - indicate which network interface packets are sent
SYNOPSIS
#include <sys/neti.h>
phy_if_t net_routeto(const net_data_t *net, struct sockaddr *address,
struct sockaddr *nexthop);
INTERFACE LEVEL
Solaris DDI specific (Solaris DDI).
PARAMETERS
net value returned from a successful call to net_protocol_lookup(9F).
address network address to find a path out of the machine for.
nexthop pointer to the sockaddr structure in which to store the address of the next hop. If this information is not required, the value
NULL may be passed instead.
DESCRIPTION
The net_routeto() function indicates which network interface packets destined for a particular address would be sent out of, according to
the systems network routing tables. If next is supplied as a non-NULL pointer, the IP address of the nexthop router to be used is returned
in it.
RETURN VALUES
The net_routeto() function returns:
-1 The network protocol does not support this function.
0 This function cannot find a route for the address given.
>0 Indicates which network interface can be used to reach the given address.
CONTEXT
The net_routeto() function may be called from user, kernel, or interrupt context.
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Availability |SUNWcsu |
+-----------------------------+-----------------------------+
|Interface Stability |Committed |
+-----------------------------+-----------------------------+
SEE ALSO
net_phygetnext(9F), net_phylookup(9F), net_protocol_lookup(9F), attributes(5)
SunOS 5.11 1 May 2008 net_routeto(9F)