From 9641458d3ec42def729fde64669abf07f3220cd5 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?R=C3=A9mi=20Denis-Courmont?= Date: Sun, 5 Oct 2008 11:15:13 -0700 Subject: Phonet: Pipe End Point for Phonet Pipes protocol MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit This protocol provides some connection handling and negotiated congestion control. Nokia cellular modems use it for bulk transfers. It provides packet boundaries (hence SOCK_SEQPACKET). Congestion control is per packet rather per byte, so we do not re-use the generic socket memory accounting. Signed-off-by: Rémi Denis-Courmont Signed-off-by: David S. Miller --- include/net/phonet/pep.h | 114 +++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 114 insertions(+) (limited to 'include/net') diff --git a/include/net/phonet/pep.h b/include/net/phonet/pep.h index b2f8c54c5333..fb024e186860 100644 --- a/include/net/phonet/pep.h +++ b/include/net/phonet/pep.h @@ -26,11 +26,21 @@ struct pep_sock { struct pn_sock pn_sk; + /* XXX: union-ify listening vs connected stuff ? */ /* Listening socket stuff: */ struct hlist_head ackq; + struct hlist_head hlist; /* Connected socket stuff: */ + struct sock *listener; + u16 peer_type; /* peer type/subtype */ + u8 pipe_handle; + + u8 rx_credits; u8 tx_credits; + u8 rx_fc; /* RX flow control */ + u8 tx_fc; /* TX flow control */ + u8 init_enable; /* auto-enable at creation */ }; static inline struct pep_sock *pep_sk(struct sock *sk) @@ -40,4 +50,108 @@ static inline struct pep_sock *pep_sk(struct sock *sk) extern const struct proto_ops phonet_stream_ops; +/* Pipe protocol definitions */ +struct pnpipehdr { + u8 utid; /* transaction ID */ + u8 message_id; + u8 pipe_handle; + union { + u8 state_after_connect; /* connect request */ + u8 state_after_reset; /* reset request */ + u8 error_code; /* any response */ + u8 pep_type; /* status indication */ + u8 data[1]; + }; +}; +#define other_pep_type data[1] + +static inline struct pnpipehdr *pnp_hdr(struct sk_buff *skb) +{ + return (struct pnpipehdr *)skb_transport_header(skb); +} + +#define MAX_PNPIPE_HEADER (MAX_PHONET_HEADER + 4) + +enum { + PNS_PIPE_DATA = 0x20, + + PNS_PEP_CONNECT_REQ = 0x40, + PNS_PEP_CONNECT_RESP, + PNS_PEP_DISCONNECT_REQ, + PNS_PEP_DISCONNECT_RESP, + PNS_PEP_RESET_REQ, + PNS_PEP_RESET_RESP, + PNS_PEP_ENABLE_REQ, + PNS_PEP_ENABLE_RESP, + PNS_PEP_CTRL_REQ, + PNS_PEP_CTRL_RESP, + PNS_PEP_DISABLE_REQ = 0x4C, + PNS_PEP_DISABLE_RESP, + + PNS_PEP_STATUS_IND = 0x60, + PNS_PIPE_CREATED_IND, + PNS_PIPE_RESET_IND = 0x63, + PNS_PIPE_ENABLED_IND, + PNS_PIPE_REDIRECTED_IND, + PNS_PIPE_DISABLED_IND = 0x66, +}; + +#define PN_PIPE_INVALID_HANDLE 0xff +#define PN_PEP_TYPE_COMMON 0x00 + +/* Phonet pipe status indication */ +enum { + PN_PEP_IND_FLOW_CONTROL, + PN_PEP_IND_ID_MCFC_GRANT_CREDITS, +}; + +/* Phonet pipe error codes */ +enum { + PN_PIPE_NO_ERROR, + PN_PIPE_ERR_INVALID_PARAM, + PN_PIPE_ERR_INVALID_HANDLE, + PN_PIPE_ERR_INVALID_CTRL_ID, + PN_PIPE_ERR_NOT_ALLOWED, + PN_PIPE_ERR_PEP_IN_USE, + PN_PIPE_ERR_OVERLOAD, + PN_PIPE_ERR_DEV_DISCONNECTED, + PN_PIPE_ERR_TIMEOUT, + PN_PIPE_ERR_ALL_PIPES_IN_USE, + PN_PIPE_ERR_GENERAL, + PN_PIPE_ERR_NOT_SUPPORTED, +}; + +/* Phonet pipe states */ +enum { + PN_PIPE_DISABLE, + PN_PIPE_ENABLE, +}; + +/* Phonet pipe sub-block types */ +enum { + PN_PIPE_SB_CREATE_REQ_PEP_SUB_TYPE, + PN_PIPE_SB_CONNECT_REQ_PEP_SUB_TYPE, + PN_PIPE_SB_REDIRECT_REQ_PEP_SUB_TYPE, + PN_PIPE_SB_NEGOTIATED_FC, + PN_PIPE_SB_REQUIRED_FC_TX, + PN_PIPE_SB_PREFERRED_FC_RX, +}; + +/* Phonet pipe flow control models */ +enum { + PN_NO_FLOW_CONTROL, + PN_LEGACY_FLOW_CONTROL, + PN_ONE_CREDIT_FLOW_CONTROL, + PN_MULTI_CREDIT_FLOW_CONTROL, +}; + +#define pn_flow_safe(fc) ((fc) >> 1) + +/* Phonet pipe flow control states */ +enum { + PEP_IND_EMPTY, + PEP_IND_BUSY, + PEP_IND_READY, +}; + #endif -- cgit v1.2.1