| 1 | The following issues exist with the EFI Socket Library:
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| 2 |
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| 3 | * Don't run socket applications or the socket driver for a long time - The IPv4Config
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| 4 | and DHCP protocols are not properly running the renew and lease expiration timers.
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| 5 | When the DHCP lease expires it is possible for a duplicate IP address to exist on
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| 6 | the network. HSD 206136
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| 7 |
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| 8 | * Network adapters must be initialized prior to running the socket application - Static
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| 9 | and dynamic IP address need to be properly assigned to the network adapters on the
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| 10 | system. Note that sockets does not assign the IP addresses since it does not
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| 11 | understand how the system is connected to the network!
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| 12 |
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| 13 | * The default device must contain the Efi\etc directory populated with files containing
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| 14 | the proper network configuration - A template set of files is in StdLib\Efi\etc. Note
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| 15 | that the resolv.conf file contains the set of DNS servers.
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| 16 |
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| 17 | * Since DHCP is not running when the sockets application is running, the last negotiated
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| 18 | packet is no longer available. As a result, any of the options that DHCP did negotiate
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| 19 | are no longer available for sockets such as the list of DNS servers.
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| 20 |
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| 21 | * DHCP does not request the domain name and domain name server (DNS) addresses. This
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| 22 | requires that sockets use configuration files in Efi\etc!
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| 23 |
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| 24 | * TCPv4 transfer rate is slow (< 10 Mbits/sec) - This is an unidentified issue.
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| 25 |
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| 26 | * Tcp4Dxe transmits more urgent data than is sent through sockets when normal data is
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| 27 | queued for transmission before the urgent data. HSD 206365
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| 28 |
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| 29 | * Raw socket applications are not able to pass the IP header as part of their
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| 30 | payload by using the IP option IP_HDRINCL. This is because the UEFI IPv4 driver
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| 31 | (Ip4Dxe) does not support RawData. HSD 206136
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| 32 |
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| 33 | * Only version 4 of the UEFI network stack is supported
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| 34 |
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