(server)promiscuous socket^connected socket

[[tcp/ip sockets in C]] P100 has a diagram showing that an incoming packet will be matched against multiple candidate listening sockets:

  • format: {local address:local port / remote address:remote port}
  • Socket 0: { *:99/*:*}
  • Socket 1: {10.1.2.3:99/*:*}
  • Socket 2: {192.168.3.2:99/ 172.1.2.3:30001} — this one has the remote address:port populated because it’s an Established connection)

An incoming packet need to match all fields otherwise it’s rejected.

However it could find multiple candidate sockets. Socket 0 is very “promiscuous”. The rule (described in the book) is — the more wild cards, the less likely selected.

(Each packet must be delivered to at most 1 socket as far as I know.)

(server)promiscuous socket^connected socket”的一个响应

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