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Full Discussion: TCPdump
Special Forums IP Networking TCPdump Post 302951385 by gwillie on Wednesday 5th of August 2015 09:56:01 PM
Old 08-05-2015
In order to know a packet is not for it, it reads the destination mac address in the frame. You are in promiscuous mode so interface will accept all frames regardless of destination, reconstitute to a packet and send to cpu
 

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net_inject_t(9S)					    Data Structures for Drivers 					  net_inject_t(9S)

NAME
net_inject_t - structure for describing how to transmit a packet SYNOPSIS
#include <sys/neti.h> INTERFACE LEVEL
Solaris DDI specific (Solaris DDI). DESCRIPTION
The net_inject_t data structure passes information in to net_inject about how to transmit a packet. Transmit includes sending the packet up into the system as well as out of it. STRUCTURE MEMBERS
mblk_t *ni_packet; /* start of the packet */ struct sockaddr_storage ni_addr; /* address of next hop */ phy_if_t ni_physical; /* network interface to use */ ni_packet Pointer to the first the mblk_t data structure that makes up this packet. ni_addr This field is only required to be initialized if NI_DIRECT_OUT is being used to transmit the packet. The sockaddr_storage field must be set to indicate whether the destination address contained in the structure is IPv4 (cast ni_addr to struct sockaddr_in) or IPv6 (cast ni_addr to struct sockaddr_in6). ni_physical The physical interface where the packet will be injected. ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Interface Stability |Committed | +-----------------------------+-----------------------------+ SEE ALSO
net_inject(9F), netinfo(9F), attributes(5) SunOS 5.11 1 May 2008 net_inject_t(9S)
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