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| author | Rémi Denis-Courmont <remi.denis-courmont@nokia.com> | 2011-03-08 22:44:11 +0000 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2011-03-09 11:59:32 -0800 |
| commit | acaf7df610ff3faf1778ce40d601fc3dd4a41b40 (patch) | |
| tree | a6ed66e7314b43d253dceb5930da6b5fc40d051f /Documentation | |
| parent | f7ae8d59f66154df0424fd94035c89981fed3379 (diff) | |
| download | linux-acaf7df610ff3faf1778ce40d601fc3dd4a41b40.tar.gz linux-acaf7df610ff3faf1778ce40d601fc3dd4a41b40.tar.bz2 linux-acaf7df610ff3faf1778ce40d601fc3dd4a41b40.zip | |
Phonet: provide pipe socket option to retrieve the pipe identifier
User-space sometimes needs this information. In particular, the GPRS
context or the AT commands pipe setups may use the pipe handle as a
reference.
This removes the settable pipe handle with CONFIG_PHONET_PIPECTRLR.
It did not handle error cases correctly. Furthermore, the kernel
*could* implement a smart scheme for allocating handles (if ever
needed), but userspace really cannot.
Signed-off-by: Rémi Denis-Courmont <remi.denis-courmont@nokia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/networking/phonet.txt | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/Documentation/networking/phonet.txt b/Documentation/networking/phonet.txt index 24ad2adba6e5..cacac968c1c3 100644 --- a/Documentation/networking/phonet.txt +++ b/Documentation/networking/phonet.txt @@ -181,6 +181,10 @@ The pipe protocol provides two socket options at the SOL_PNPIPE level: interface index of the network interface created by PNPIPE_ENCAP, or zero if encapsulation is off. + PNPIPE_HANDLE is a read-only integer value. It contains the underlying + identifier ("pipe handle") of the pipe. This is only defined for + socket descriptors that are already connected or being connected. + Phonet Pipe-controller Implementation ------------------------------------- @@ -199,9 +203,6 @@ between itself and a remote pipe-end point (e.g. modem). The implementation adds socket options at SOL_PNPIPE level: - PNPIPE_PIPE_HANDLE - It accepts an integer argument for setting value of pipe handle. - PNPIPE_ENABLE accepts one integer value (int). If set to zero, the pipe is disabled. If the value is non-zero, the pipe is enabled. If the pipe is not (yet) connected, ENOTCONN is error is returned. |