Constant MAX_IP_SOCKET_MATCHERS 

pub const MAX_IP_SOCKET_MATCHERS: u32 = 128; // 128u32

The maximum number of IpSocketMatchers that can be specified in a request.

The theoretical maximum imposed by the 64 KiB Zircon channel message limit is 629 (64 bytes of fixed overhead and 104 bytes per IpSocketMatcher). However, as a practical limit to avoid unreasonable numbers of matchers.