1. API Extension for MIF- enabled Hosts Dapeng Liu, Zhen Cao, Bo Zhou

2. The Problem The problem –5.9. Applications usually do not have advanced APIs to specify the source IP address or to set preferences on the address selection policies.

3. The Scenario Applications IF 1 IF n …… Server IF 2 Host Applications can specify the source address Applications can set the preference of address selection Applications can failover among different interfaces

4. Requirements R1: Compatible with existing Socket APIs R2: Support for Multiple Connection to multiple domains R3: No Changes to Existing Socket APIs R4: Easy for Implementation

5. Extended Data Structure GenericConnection is to encapsulate a socket and related information, often used as a link list –next: this is an pointer that points to another GenericConnection –index: the index of this node on the link –dev: point to a physical interface structure –priority: the priority of this socket –status: indicate the interface status –sock: point to a socket structure struct GenericConnection { struct GenericConnection *next; int index; struct Netdevice *dev; int priority; char status; struct socket *sock; }

6. Our work: an example Socket #1 Socket #2 IF1 IF2 Pr=0 Pr=1 ConnectionMap() GenericConnection Application *gconn BindToConnection()

7. Thanks Questions and Comments?