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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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9641458d3e
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 <remi.denis-courmont@nokia.com> Signed-off-by: David S. Miller <davem@davemloft.net>
163 lines
3.9 KiB
C
163 lines
3.9 KiB
C
/**
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* file phonet.h
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*
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* Phonet sockets kernel interface
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*
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* Copyright (C) 2008 Nokia Corporation. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* version 2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
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* 02110-1301 USA
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*/
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#ifndef LINUX_PHONET_H
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#define LINUX_PHONET_H
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/* Automatic protocol selection */
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#define PN_PROTO_TRANSPORT 0
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/* Phonet datagram socket */
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#define PN_PROTO_PHONET 1
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/* Phonet pipe */
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#define PN_PROTO_PIPE 2
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#define PHONET_NPROTO 3
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#define PNADDR_ANY 0
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#define PNPORT_RESOURCE_ROUTING 0
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/* ioctls */
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#define SIOCPNGETOBJECT (SIOCPROTOPRIVATE + 0)
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/* Phonet protocol header */
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struct phonethdr {
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__u8 pn_rdev;
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__u8 pn_sdev;
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__u8 pn_res;
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__be16 pn_length;
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__u8 pn_robj;
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__u8 pn_sobj;
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} __attribute__((packed));
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/* Common Phonet payload header */
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struct phonetmsg {
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__u8 pn_trans_id; /* transaction ID */
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__u8 pn_msg_id; /* message type */
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union {
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struct {
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__u8 pn_submsg_id; /* message subtype */
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__u8 pn_data[5];
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} base;
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struct {
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__u16 pn_e_res_id; /* extended resource ID */
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__u8 pn_e_submsg_id; /* message subtype */
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__u8 pn_e_data[3];
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} ext;
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} pn_msg_u;
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};
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#define PN_COMMON_MESSAGE 0xF0
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#define PN_PREFIX 0xE0 /* resource for extended messages */
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#define pn_submsg_id pn_msg_u.base.pn_submsg_id
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#define pn_e_submsg_id pn_msg_u.ext.pn_e_submsg_id
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#define pn_e_res_id pn_msg_u.ext.pn_e_res_id
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#define pn_data pn_msg_u.base.pn_data
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#define pn_e_data pn_msg_u.ext.pn_e_data
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/* data for unreachable errors */
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#define PN_COMM_SERVICE_NOT_IDENTIFIED_RESP 0x01
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#define PN_COMM_ISA_ENTITY_NOT_REACHABLE_RESP 0x14
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#define pn_orig_msg_id pn_data[0]
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#define pn_status pn_data[1]
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#define pn_e_orig_msg_id pn_e_data[0]
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#define pn_e_status pn_e_data[1]
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/* Phonet socket address structure */
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struct sockaddr_pn {
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sa_family_t spn_family;
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__u8 spn_obj;
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__u8 spn_dev;
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__u8 spn_resource;
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__u8 spn_zero[sizeof(struct sockaddr) - sizeof(sa_family_t) - 3];
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} __attribute__ ((packed));
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static inline __u16 pn_object(__u8 addr, __u16 port)
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{
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return (addr << 8) | (port & 0x3ff);
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}
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static inline __u8 pn_obj(__u16 handle)
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{
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return handle & 0xff;
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}
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static inline __u8 pn_dev(__u16 handle)
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{
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return handle >> 8;
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}
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static inline __u16 pn_port(__u16 handle)
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{
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return handle & 0x3ff;
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}
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static inline __u8 pn_addr(__u16 handle)
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{
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return (handle >> 8) & 0xfc;
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}
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static inline void pn_sockaddr_set_addr(struct sockaddr_pn *spn, __u8 addr)
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{
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spn->spn_dev &= 0x03;
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spn->spn_dev |= addr & 0xfc;
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}
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static inline void pn_sockaddr_set_port(struct sockaddr_pn *spn, __u16 port)
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{
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spn->spn_dev &= 0xfc;
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spn->spn_dev |= (port >> 8) & 0x03;
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spn->spn_obj = port & 0xff;
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}
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static inline void pn_sockaddr_set_object(struct sockaddr_pn *spn,
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__u16 handle)
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{
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spn->spn_dev = pn_dev(handle);
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spn->spn_obj = pn_obj(handle);
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}
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static inline void pn_sockaddr_set_resource(struct sockaddr_pn *spn,
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__u8 resource)
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{
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spn->spn_resource = resource;
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}
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static inline __u8 pn_sockaddr_get_addr(const struct sockaddr_pn *spn)
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{
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return spn->spn_dev & 0xfc;
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}
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static inline __u16 pn_sockaddr_get_port(const struct sockaddr_pn *spn)
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{
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return ((spn->spn_dev & 0x03) << 8) | spn->spn_obj;
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}
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static inline __u16 pn_sockaddr_get_object(const struct sockaddr_pn *spn)
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{
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return pn_object(spn->spn_dev, spn->spn_obj);
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}
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static inline __u8 pn_sockaddr_get_resource(const struct sockaddr_pn *spn)
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{
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return spn->spn_resource;
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}
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#endif
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