0d75e8b79
Denys Vlasenko
2019-04-13
Subject
udhcpc6: add a few comments, no code changes.
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networking/udhcp/d6_dhcpc.c+1 -0
| @@ -531,6 +531,7 @@ static uint8_t *add_d6_client_options(uint8_t *ptr) | |
| static int d6_mcast_from_client_config_ifindex(struct d6_packet *packet, uint8_t *end) | |
| { | |
| + | /* FF02::1:2 is "All_DHCP_Relay_Agents_and_Servers" address */ |
| static const uint8_t FF02__1_2[16] = { | |
| 0xFF, 0x02, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, | |
| 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x02, | |
networking/udhcp/d6_socket.c+9 -0
| @@ -38,6 +38,15 @@ int FAST_FUNC d6_read_interface(const char *interface, int *ifindex, struct in6_ | |
| log1("IP %s", inet_ntoa(((struct sockaddr_in *)ifa->ifa_addr)->sin_addr)); | |
| } | |
| #endif | |
| + | /* RFC 3315 |
| + | * 16. Client Source Address and Interface Selection |
| + | * |
| + | * "When a client sends a DHCP message to the |
| + | * All_DHCP_Relay_Agents_and_Servers address, ... ... The client |
| + | * MUST use a link-local address assigned to the interface for which it |
| + | * is requesting configuration information as the source address in the |
| + | * header of the IP datagram." |
| + | */ |
| if (ifa->ifa_addr->sa_family == AF_INET6 | |
| && IN6_IS_ADDR_LINKLOCAL(&sip6->sin6_addr) | |
| ) { | |