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Add UDP MTU configurability.

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This commit is contained in:
Adam Ierymenko 2017-09-01 16:25:34 -07:00
parent 2d858b05ac
commit f8014413a3
11 changed files with 134 additions and 84 deletions
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55
include/ZeroTierOne.h
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@ -93,13 +93,17 @@ extern "C" {
#define ZT_MAX_MTU 10000
/**
* Default payload MTU for UDP packets
* Minimum UDP payload size allowed
*/
#define ZT_MIN_PHYSMTU 1400
/**
* Default UDP payload size (physical path MTU) not including UDP and IP overhead
*
* This is 1500 - IPv6 UDP overhead - PPPoE overhead and is safe for 99.9% of
* all Internet links.
*/
#define ZT_DEFAULT_PHYSMTU 1444
#define ZT_UDP_DEFAULT_PAYLOAD_MTU 1444
/**
* Maximum physical UDP payload
@ -172,9 +176,9 @@ extern "C" {
#define ZT_MAX_PEER_NETWORK_PATHS 4
/**
* Maximum number of trusted physical network paths
* Maximum number of path configurations that can be set
*/
#define ZT_MAX_TRUSTED_PATHS 16
#define ZT_MAX_CONFIGURABLE_PATHS 32
/**
* Maximum number of rules per capability
@ -1058,11 +1062,6 @@ typedef struct
*/
unsigned int mtu;
/**
* Recommended MTU to avoid fragmentation at the physical layer (hint)
*/
unsigned int physicalMtu;
/**
* If nonzero, the network this port belongs to indicates DHCP availability
*
@ -1132,6 +1131,21 @@ typedef struct
unsigned long networkCount;
} ZT_VirtualNetworkList;
/**
* Physical path configuration
*/
typedef struct {
/**
* If non-zero set this physical network path to be trusted to disable encryption and authentication
*/
uint64_t trustedPathId;
/**
* Physical path MTU from ZT_MIN_PHYSMTU and ZT_MAX_PHYSMTU or <= 0 to use default
*/
int mtu;
} ZT_PhysicalPathConfiguration;
/**
* Physical network path to a peer
*/
@ -1856,27 +1870,14 @@ ZT_SDK_API int ZT_Node_sendUserMessage(ZT_Node *node,void *tptr,uint64_t dest,ui
ZT_SDK_API void ZT_Node_setNetconfMaster(ZT_Node *node,void *networkConfigMasterInstance);
/**
* Set trusted paths
*
* A trusted path is a physical network (network/bits) over which both
* encryption and authentication can be skipped to improve performance.
* Each trusted path must have a non-zero unique ID that is the same across
* all participating nodes.
*
* We don't recommend using trusted paths at all unless you really *need*
* near-bare-metal performance. Even on a LAN authentication and encryption
* are never a bad thing, and anything that introduces an "escape hatch"
* for encryption should be treated with the utmost care.
*
* Calling with NULL pointers for networks and ids and a count of zero clears
* all trusted paths.
* Set configuration for a given physical path
*
* @param node Node instance
* @param networks Array of [count] networks
* @param ids Array of [count] corresponding non-zero path IDs (zero path IDs are ignored)
* @param count Number of trusted paths-- values greater than ZT_MAX_TRUSTED_PATHS are clipped
* @param pathNetwork Network/CIDR of path or NULL to clear the cache and reset all paths to default
* @param pathConfig Path configuration or NULL to erase this entry and therefore reset it to NULL
* @return OK or error code
*/
ZT_SDK_API void ZT_Node_setTrustedPaths(ZT_Node *node,const struct sockaddr_storage *networks,const uint64_t *ids,unsigned int count);
ZT_SDK_API enum ZT_ResultCode ZT_Node_setPhysicalPathConfiguration(ZT_Node *node,const struct sockaddr_storage *pathNetwork,const ZT_PhysicalPathConfiguration *pathConfig);
/**
* Get ZeroTier One version