USOCKET

Comparison to "trivial-sockets"

usocket supports more backends than trivial-sockets. The latter implements different feature-sets for different backends while the former supplies consistent functionality for all backends.

Feature In trivial-sockets? In usocket?

ABCL ACL clisp CMUCL LispWorks OpenMCL SBCL overall
Client side tcp streams :element-type Yes Yes* Yes Yes Yes Yes* Yes Yes Yes
:external-format No No Yes No No No No No No
binding local interface/port No Yes No No No Yes Yes No Yes
Server socket creation Binding specific local port Yes
Binding specific local interface No Yes No Yes No Yes Yes No Yes
Selectable backlog length No Yes No Yes No Yes Yes No Yes
reuse-address Yes Yes No* Yes Yes Yes Yes No* Yes*
:element-type for created connections No Yes
Accepting connections :element-type for created stream Yes Yes* Yes Yes Yes Yes* Yes Yes Yes*
:external-format for created stream No No Yes No No No No No No

In summary: there are only a very limited number of features you can depend on to work on all platforms supported by trivial-sockets. While usocket doesn't support all features, you can depend on the features to be available.

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