slaac: add initial SLAAC implementation

Author: bergzand

Cargo.toml

@@ -184,6 +184,15 @@ iface-max-route-count-256 = []
 iface-max-route-count-512 = []
 iface-max-route-count-1024 = []
 
+iface-max-prefix-count-1 = [] # Default
+iface-max-prefix-count-2 = []
+iface-max-prefix-count-3 = []
+iface-max-prefix-count-4 = []
+iface-max-prefix-count-5 = []
+iface-max-prefix-count-6 = []
+iface-max-prefix-count-7 = []
+iface-max-prefix-count-8 = []
+
 fragmentation-buffer-size-256 = []
 fragmentation-buffer-size-512 = []
 fragmentation-buffer-size-1024 = []

README.md

@@ -256,6 +256,11 @@ Amount of "IP address -> hardware address" entries the neighbor cache (also know
 
 Max amount of routes that can be added to one interface. Includes the default route. Includes both IPv4 and IPv6. Default: 2.
 
+### `IFACE_MAX_PREFIX_COUNT`
+
+Max amount of IPv6 prefixes that can be added to one interface via SLAAC.
+Should be lower or equal to `IFACE_MAX_ADDR_COUNT`.
+
 ### `FRAGMENTATION_BUFFER_SIZE`
 
 Size of the buffer used for fragmenting outgoing packets larger than the MTU. Packets larger than this setting will be dropped instead of fragmented. Default: 1500.

build.rs

@@ -11,6 +11,7 @@ static CONFIGS: &[(&str, usize)] = &[
     ("IFACE_MAX_SIXLOWPAN_ADDRESS_CONTEXT_COUNT", 4),
     ("IFACE_NEIGHBOR_CACHE_COUNT", 8),
     ("IFACE_MAX_ROUTE_COUNT", 2),
+    ("IFACE_MAX_PREFIX_COUNT", 1),
     ("FRAGMENTATION_BUFFER_SIZE", 1500),
     ("ASSEMBLER_MAX_SEGMENT_COUNT", 4),
     ("REASSEMBLY_BUFFER_SIZE", 1500),

gen_config.py

@@ -32,6 +32,7 @@ def feature(name, default, min, max, pow2=None):
 feature("iface_max_sixlowpan_address_context_count", default=4, min=1, max=1024, pow2=8)
 feature("iface_neighbor_cache_count", default=8, min=1, max=1024, pow2=8)
 feature("iface_max_route_count", default=2, min=1, max=1024, pow2=8)
+feature("iface_max_prefix_count", default=1, min=1, max=8)
 feature("fragmentation_buffer_size", default=1500, min=256, max=65536, pow2=True)
 feature("assembler_max_segment_count", default=4, min=1, max=32, pow2=4)
 feature("reassembly_buffer_size", default=1500, min=256, max=65536, pow2=True)

src/iface/mod.rs

@@ -11,6 +11,11 @@ mod neighbor;
 mod route;
 #[cfg(feature = "proto-rpl")]
 mod rpl;
+#[cfg(all(
+    feature = "proto-ipv6",
+    any(feature = "medium-ethernet", feature = "medium-ieee802154")
+))]
+mod slaac;
 mod socket_meta;
 mod socket_set;
 
@@ -23,4 +28,9 @@ pub use self::interface::{
 };
 
 pub use self::route::{Route, RouteTableFull, Routes};
+#[cfg(all(
+    feature = "proto-ipv6",
+    any(feature = "medium-ethernet", feature = "medium-ieee802154")
+))]
+pub use self::slaac::Slaac;
 pub use self::socket_set::{SocketHandle, SocketSet, SocketStorage};