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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 | |
| parent | f7ae8d59f66154df0424fd94035c89981fed3379 (diff) | |
| download | linux-stable-acaf7df610ff3faf1778ce40d601fc3dd4a41b40.tar.gz linux-stable-acaf7df610ff3faf1778ce40d601fc3dd4a41b40.tar.bz2 linux-stable-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>
| -rw-r--r-- | Documentation/networking/phonet.txt | 7 | ||||
| -rw-r--r-- | include/linux/phonet.h | 2 | ||||
| -rw-r--r-- | net/phonet/pep.c | 15 |
3 files changed, 12 insertions, 12 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. diff --git a/include/linux/phonet.h b/include/linux/phonet.h index 26c8df786918..32a0965da953 100644 --- a/include/linux/phonet.h +++ b/include/linux/phonet.h @@ -36,7 +36,7 @@ /* Socket options for SOL_PNPIPE level */ #define PNPIPE_ENCAP 1 #define PNPIPE_IFINDEX 2 -#define PNPIPE_PIPE_HANDLE 3 +#define PNPIPE_HANDLE 3 #define PNPIPE_ENABLE 4 /* unused slot */ diff --git a/net/phonet/pep.c b/net/phonet/pep.c index c0fab4cfcef7..abfb795af142 100644 --- a/net/phonet/pep.c +++ b/net/phonet/pep.c @@ -853,6 +853,7 @@ static int pep_sock_connect(struct sock *sk, struct sockaddr *addr, int len) pn->pn_sk.dobject = pn_sockaddr_get_object(spn); pn->pn_sk.resource = pn_sockaddr_get_resource(spn); + pn->pipe_handle = 1; /* anything but INVALID_HANDLE */ return pipe_handler_request(sk, PNS_PEP_CONNECT_REQ, PN_PIPE_DISABLE, data, 4); } @@ -909,14 +910,6 @@ static int pep_setsockopt(struct sock *sk, int level, int optname, lock_sock(sk); switch (optname) { -#ifdef CONFIG_PHONET_PIPECTRLR - case PNPIPE_PIPE_HANDLE: - if (val) { - pn->pipe_handle = val; - break; - } -#endif - case PNPIPE_ENCAP: if (val && val != PNPIPE_ENCAP_IP) { err = -EINVAL; @@ -982,6 +975,12 @@ static int pep_getsockopt(struct sock *sk, int level, int optname, val = pn->ifindex; break; + case PNPIPE_HANDLE: + val = pn->pipe_handle; + if (val == PN_PIPE_INVALID_HANDLE) + return -EINVAL; + break; + #ifdef CONFIG_PHONET_PIPECTRLR case PNPIPE_ENABLE: val = sk->sk_state == TCP_ESTABLISHED; |