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Problem Report 1161 Details

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Report 1161 Actions

    Problem Report Number 1161
    Submitter's Classification Test Suite problem
    State Resolved
    Resolution Rejected (REJ)
    Problem Resolution ID REJ.X.0363
    Raised 1970-01-01 08:00
    Updated 2003-03-13 08:00
    Published null
    Product Standard Sockets (UNIX 95)
    Certification Program The Open Brand certification program
    Test Suite VSU version 4.1.0
    Test Identification Sockets/bind 6
    Problem Summary PG4U.00107 The IR claims that a protocol by default may bind to a new local address when a socket is already bound to an local address.
    Problem Text
    The test source is inconsistent with the test assertion.

    The X/Open CAE specification, Networking Services, Issue 4 contains the
    following statement with respect to the EINVAL errno for the bind()
    interface:

    EINVAL The socket is already bound to an address, and the protocol
    does not support binding to a new address; or the socket
    has been shut down.

    As also noted in the test assertion for bind #6, this test case is testing
    for the EINVAL errno in the case where the protocol DOES NOT support
    binding to a new address. The problem is that the test itself makes the
    assumption that the implementation does not support binding to the new
    address, when in fact the implementation may support this behavior.

    In the case under test, our implementation of AF_INET and AF_UNIX sockets
    DOES support binding to a new address in the case where the socket is
    already bound to an address. The test does not appear to take into
    consideration that this support may exist and as a result expects a
    return value of -1 with errno set to EINVAL. There is no VSU
    configuration variable to specify which protocols support binding already
    bound sockets to a new address. We suggest that such a configuration
    variable be added or the test be rewritten to except as a valid result
    a return value of 0 and the value of errno unchanged.
    Test Output
    TEST CASE: bind

    TEST PURPOSE #6
    If the implementation supports a communications
    domain and a socket type:
    EINVAL in errno and return -1 on a call to int
    bind(int socket, const struct sockaddr *address,
    size_t address_len) when the socket is already bound
    to an address and the protocol does not support binding to a new address.
    TEST: AF_INET SOCK_STREAM
    PREP: Create test sockaddr_in: address = 129.146.85.212, port = 4913
    PREP: Create socket
    TEST: Bind socket
    TEST: Bind again
    TEST: Return value
    ERROR: bind call succeeded unexpectedly, returned 0
    6 FAIL

    Review Information

    Review Type TSMA Review
    Start Date null
    Completed null
    Status Complete
    Review Recommendation No Resolution Given
    Review Response
    We recommend this request be refused.

    The standard does permit a protocol to reuse local addresses, but not
    as a default.

    The underlying issue here is the setting of SO_REUSEADDR. X/Open standards
    defer to POSIX in cases where the standard is vague or unclear.

    POSIX.12 states in section 5.3,

    SO_REUSEADDR indicates that the rules used in validating
    addresses supplied in a bind() should allow reuse of local
    addresses. Operation of theis option is protocol-specific.
    the defult value for SO_REUSEADDR is off, that is, reuse of
    local addresses is not permitted.

    Even if the protocol supports local address reuse, the default is to
    not permit local address reuse.

    Consequently, the second bind should not succeed in the test.

    Review Type SA Review
    Start Date null
    Completed null
    Status Complete
    Review Resolution Rejected (REJ)
    Review Conclusion
    This request is refused.

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