diff options
| -rw-r--r-- | man/man2type/in_pktinfo.2type | 11 |
1 files changed, 8 insertions, 3 deletions
diff --git a/man/man2type/in_pktinfo.2type b/man/man2type/in_pktinfo.2type index e5d767cf83..bccafffc82 100644 --- a/man/man2type/in_pktinfo.2type +++ b/man/man2type/in_pktinfo.2type @@ -23,21 +23,24 @@ struct in_pktinfo { }; .EE .SH DESCRIPTION +.SS recvmsg(2) When returned by .BR recvmsg (2) , .I .ipi_ifindex is the unique index of the interface the packet was received on. +.P .I .ipi_spec_dst -is the preferred source address for replies to the given packet, -and +is the preferred source address for replies to the given packet. +.P .I .ipi_addr is the destination address in the packet header. +.P These addresses are usually the same, but can differ for broadcast or multicast packets. Depending on the configured routes, .I .ipi_spec_dst might belong to a different interface from the one that received the packet. -.P +.SS sendmsg(2) If .B IP_PKTINFO is passed to @@ -49,6 +52,7 @@ is not zero, then it is used as the local source address, for the routing table lookup, and for setting up IP source route options. +.P When .I .ipi_ifindex is not zero, @@ -56,6 +60,7 @@ the primary local address of the interface specified by the index overwrites .I .ipi_spec_dst for the routing table lookup. +.P .I .ipi_addr is ignored. .SH STANDARDS |