Add socket udp peek #383
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Add socket udp peek #383
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Introduces the peek(N) method for UDP request sockets in the preread phase, allowing inspection of N bytes from the preread buffer without consuming them. Updates the UDP socket implementation, metatable, and state tracking to support this feature. Adds documentation and comprehensive tests for UDP socket peek behavior, including error and edge cases.
Replaces the coroutine cleanup handler from ngx_stream_lua_coctx_cleanup to ngx_stream_lua_udp_socket_cleanup in ngx_stream_lua_req_socket_udp_peek. This ensures proper cleanup specific to UDP socket operations when yielding due to insufficient preread buffer data.
Added a check for NULL buffer before calculating the size in ngx_stream_lua_req_socket_udp_peek_resume to prevent potential null pointer dereference.
Introduces additional debug logging when the UDP socket peek() method is called and updates an existing log message for clarity. This helps with tracing and debugging UDP socket operations in the stream lua module.
zhuizhuhaomeng
requested changes
Sep 1, 2025
| @@ -1122,6 +1128,8 @@ ngx_stream_lua_socket_udp_receive(lua_State *L) | |||
| r->connection->buffer->pos, u->received); | |||
| r->connection->buffer->pos += u->received; | |||
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| u->read_consumed = 1; | |||
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If there are multiple udp packets in the same stream, will peak available in every packet?
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Changes
reqsock:peekfor UDP preread sockets