744ee5db1
Denys Vlasenko
2014-02-07
Subject
udhcpc: in comments, explain the kind of raw socket we create
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networking/udhcp/dhcpc.c+4 -2
| @@ -979,6 +979,10 @@ static int udhcp_raw_socket(int ifindex) | |
| log1("Opening raw socket on ifindex %d", ifindex); //log2? | |
| fd = xsocket(PF_PACKET, SOCK_DGRAM, htons(ETH_P_IP)); | |
| + | /* ^^^^^ |
| + | * SOCK_DGRAM: remove link-layer headers on input (SOCK_RAW keeps them) |
| + | * ETH_P_IP: want to receive only packets with IPv4 eth type |
| + | */ |
| log1("Got raw socket fd"); //log2? | |
| sock.sll_family = AF_PACKET; | |
| @@ -1005,8 +1009,6 @@ static int udhcp_raw_socket(int ifindex) | |
| * | |
| * Copyright: 2006, 2007 Stefan Rompf <[email protected]>. | |
| * License: GPL v2. | |
| - | * |
| - | * TODO: make conditional? |
| */ | |
| static const struct sock_filter filter_instr[] = { | |
| /* load 9th byte (protocol) */ | |