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packet.7: Rework description of 'sockaddr_ll' fields as a list 

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
This commit is contained in:
Michael Kerrisk 2015-03-27 12:54:14 +01:00
parent 71bbbbef71
commit ab8ff64cb9
1 changed files with 6 additions and 1 deletions
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7
man7/packet.7
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@ -127,12 +127,15 @@ struct sockaddr_ll {
.fi .fi
.in .in
The fields of this structure are as follows:
.IP * 3
.I sll_protocol .I sll_protocol
is the standard ethernet protocol type in network byte order as defined is the standard ethernet protocol type in network byte order as defined
in the in the
.I <linux/if_ether.h> .I <linux/if_ether.h>
include file. include file.
It defaults to the socket's protocol. It defaults to the socket's protocol.
.IP *
.I sll_ifindex .I sll_ifindex
is the interface index of the interface is the interface index of the interface
(see (see
@ -142,6 +145,7 @@ is the interface index of the interface
is an ARP type as defined in the is an ARP type as defined in the
.I <linux/if_arp.h> .I <linux/if_arp.h>
include file. include file.
.IP *
.I sll_pkttype .I sll_pkttype
contains the packet type. contains the packet type.
Valid types are Valid types are
@ -158,12 +162,13 @@ in promiscuous mode, and
for a packet originating from the local host that is looped back to a packet for a packet originating from the local host that is looped back to a packet
socket. socket.
These types make sense only for receiving. These types make sense only for receiving.
.IP *
.I sll_addr .I sll_addr
and and
.I sll_halen .I sll_halen
contain the physical-layer (e.g., IEEE 802.3) address and its length. contain the physical-layer (e.g., IEEE 802.3) address and its length.
The exact interpretation depends on the device. The exact interpretation depends on the device.
.PP
When you send packets, it is enough to specify When you send packets, it is enough to specify
.IR sll_family , .IR sll_family ,
.IR sll_addr , .IR sll_addr ,