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This commit brings in a fragmentary, experimental implementation of NETLINK sockets. There is not too much to that socket support on this initial commit, just the netlink socketer framework. However, I decided to bring it into master because there is a enough that I would not want to lose what is in place. And since it is dependent on CONFIG_EXPERIMENATL, its presence on master should be innocuous.

Browse Source 
Squashed commit of the following:

    net/netlink:  Mark netlink support as EXPERIMENTAL.
    net/netlink/netlink_sockif.c:  Add netlink_getpeername to the socket interface.
    net:  Add getpeeername() support for netlink sockets.
    include/netpacket/netlink.h:  Add a few more definitions and structures used at the NetLink interface.  Still missing many.
    net/netlink:  Add basic framework for Netlink socket support.
    include/:  Add basic Netlink definitions.
This commit is contained in:
Gregory Nutt 2018-08-03 13:22:36 -06:00
parent caa7fa7327
commit 056d704cf9
13 changed files with 1403 additions and 3 deletions
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2
drivers/audio/wm8776.c
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@ -1,7 +1,7 @@
/****************************************************************************
* drivers/audio/wm8776.c
*
* Copyright 2017,2018 Sony Video & Sound Products Inc.
* Copyright 2017, 2018 Sony Video & Sound Products Inc.
* Author: Masayuki Ishikawa <Masayuki.Ishikawa@jp.sony.com>
*
* Based on drivers/audio/wm8904.c

323
include/netpacket/netlink.h Normal file
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@ -0,0 +1,323 @@
/****************************************************************************
* include/netpacket/netlink.h
*
* Copyright (C) 2018 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name NuttX nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
****************************************************************************/
#ifndef __INCLUDE_NETPACKET_NETLINK_H
#define __INCLUDE_NETPACKET_NETLINK_H
/****************************************************************************
* Included Files
****************************************************************************/
#include <sys/socket.h>
#include <stdint.h>
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
/* Netlink socket protocols *************************************************/
/* The AF_NETLINK family offers multiple protocol subsets. Each interfaces
* to a different kernel component and has a different messaging subset. The
* subset is referenced by the protocol field in the socket call:
*
* int socket(AF_NETLINK, SOCK_DGRAM or SOCK_RAW, protocol)
*
* Ref. Wikipedia.org
*/
#define NETLINK_ROUTE 0 /* Routing/device hook for user-space
* routing daemons */
#define NETLINK_FIREWALL 1 /* Interface to receive packets from
* the firewall */
#define NETLINK_NFLOG 2 /* netfilter/iptables ULOG */
#define NETLINK_ARPD 3 /* Interface to manage the ARP table */
#define NETLINK_AUDIT 4 /* Interface to auditing sub-system */
#define NETLINK_IP6_FW 5 /* Interface to transport packets from
* netfilter to user-space. */
#define NETLINK_ROUTE6 6
#define NETLINK_TAPBASE 7
#define NETLINK_NETFILTER 8
#define NETLINK_TCPDIAG 9
#define NETLINK_XFRM 10 /* Interface to IPsec security databases
* for key-manager daemons using the Internet
* Key Exchange protocol. */
#define NETLINK_USERSOCK 11 /* Reserved for user mode socket protocols */
/* NETLINK_ROUTE protocol message types *************************************/
/* Link layer:
*
* RTM_NEWLINK, RTM_DELLINK, RTM_GETLINK
* Create, remove or get information about a specific network interface.
* These messages contain an ifinfomsg structure followed by a series
* of rtattr structures.
*/
#define RTM_NEWLINK 0
#define RTM_DELLINK 1
#define RTM_GETLINK 2
#define RTM_SETLINK 3
/* Address settings:
*
* RTM_NEWADDR, RTM_DELADDR, RTM_GETADDR
* Add, remove or receive information about an IP address associated with
* an interface. These messages contain an ifaddrmsg structure, optionally
* followed by rtattr routing attributes.
*/
#define RTM_NEWADDR 4
#define RTM_DELADDR 5
#define RTM_GETADDR 6
/* Routing tables:
*
* RTM_NEWROUTE, RTM_DELROUTE, RTM_GETROUTE
* Create, remove or receive information about a network route. These
* messages contain an rtmsg structure with an optional sequence of
* rtattr structures following.
*
* For RTM_GETROUTE, setting rtm_dst_len and rtm_src_len to 0 means you
* get all entries for the specified routing table. For the other fields,
* except rtm_table and rtm_protocol, 0 is the wildcard.
*/
#define RTM_NEWROUTE 7
#define RTM_DELROUTE 8
#define RTM_GETROUTE 9
/* Neighbor cache:
*
* RTM_NEWNEIGH, RTM_DELNEIGH, RTM_GETNEIGH
* Add, remove or receive information about a neighbor table entry (e.g.,
* an ARP entry). The message contains an ndmsg structure.
*/
#define RTM_NEWNEIGH 10
#define RTM_DELNEIGH 11
#define RTM_GETNEIGH 12
/* Routing rules:
*
* RTM_NEWRULE, RTM_DELRULE, RTM_GETRULE
* Add, delete or retrieve a routing rule. Carries a struct rtmsg
*/
#define RTM_NEWRULE 13
#define RTM_DELRULE 14
#define RTM_GETRULE 15
/* Queuing discipline settings:
*
* RTM_NEWQDISC, RTM_DELQDISC, RTM_GETQDISC
* Add, remove or get a queuing discipline. The message contains a
* struct tcmsg and may be followed by a series of attributes.
*/
#define RTM_NEWQDISC 16
#define RTM_DELQDISC 17
#define RTM_GETQDISC 18
/* Traffic classes used with queues:
*
* RTM_NEWTCLASS, RTM_DELTCLASS, RTM_GETTCLASS
* Add, remove or get a traffic class. These messages contain a struct
* tcmsg as described above.
*/
#define RTM_NEWTCLASS 19
#define RTM_DELTCLASS 20
#define RTM_GETTCLASS 21
/* Traffic filters:
*
* RTM_NEWTFILTER, RTM_DELTFILTER, RTM_GETTFILTER
* Add, remove or receive information about a traffic filter. These
* messages contain a struct tcmsg as described above.
*/
#define RTM_NEWTFILTER 22
#define RTM_DELTFILTER 23
#define RTM_GETTFILTER 24
/* Others: */
#define RTM_NEWACTION 25
#define RTM_DELACTION 26
#define RTM_GETACTION 27
#define RTM_NEWPREFIX 28
#define RTM_GETPREFIX 29
#define RTM_GETMULTICAST 30
#define RTM_GETANYCAST 31
#define RTM_NEWNEIGHTBL 32
#define RTM_GETNEIGHTBL 33
#define RTM_SETNEIGHTBL 34
/* Definitions associated with struct sockaddr_nl ***************************/
/* Flags values */
#define NLM_F_REQUEST 0x0001 /* It is request message. */
#define NLM_F_MULTI 0x0002 /* Multipart message, terminated by NLMSG_DONE */
#define NLM_F_ACK 0x0004 /* Reply with ack, with zero or error code */
#define NLM_F_ECHO 0x0008 /* Echo this request */
#define NLM_F_DUMP_INTR 0x0010 /* Dump was inconsistent due to sequence change */
#define NLM_F_DUMP_FILTERED 0x0020 /* Dump was filtered as requested */
/* Modifiers to GET request */
#define NLM_F_ROOT 0x0100 /* specify tree root */
#define NLM_F_MATCH 0x0200 /* return all matching */
#define NLM_F_ATOMIC 0x0400 /* atomic GET */
#define NLM_F_DUMP (NLM_F_ROOT|NLM_F_MATCH)
/* Modifiers to NEW request */
#define NLM_F_REPLACE 0x0100 /* Override existing */
#define NLM_F_EXCL 0x0200 /* Do not touch, if it exists */
#define NLM_F_CREATE 0x0400 /* Create, if it does not exist */
#define NLM_F_APPEND 0x0800 /* Add to end of list */
/* Modifiers to DELETE request */
#define NLM_F_NONREC 0x0100 /* Do not delete recursively */
/* Flags for ACK message */
#define NLM_F_CAPPED 0x0100 /* request was capped */
#define NLM_F_ACK_TLVS 0x0200 /* extended ACK TVLs were included */
/* Definitions for struct rtattr ********************************************/
/* Macros to handle rtattributes */
#define RTA_ALIGNTO 4
#define RTA_ALIGN(len) (((len)+RTA_ALIGNTO-1) & ~(RTA_ALIGNTO-1))
#define RTA_OK(rta,len) \
((len) >= (int)sizeof(struct rtattr) && \
(rta)->rta_len >= sizeof(struct rtattr) && \
(rta)->rta_len <= (len))
#define RTA_NEXT(rta,attrlen) \
((attrlen) -= RTA_ALIGN((rta)->rta_len), \
(struct rtattr*)(((char*)(rta)) + RTA_ALIGN((rta)->rta_len)))
#define RTA_LENGTH(len) (RTA_ALIGN(sizeof(struct rtattr)) + (len))
#define RTA_SPACE(len) RTA_ALIGN(RTA_LENGTH(len))
#define RTA_DATA(rta) ((FAR void *)(((FAR char *)(rta)) + RTA_LENGTH(0)))
#define RTA_PAYLOAD(rta) ((int)((rta)->rta_len) - RTA_LENGTH(0))
/* Definitions for struct ifaddrmsg ****************************************/
/* ifa_flags definitions: ifa_flags is a flag word of IFA_F_SECONDARY for
* secondary address (old alias interface), IFA_F_PERMANENT for a permanent
* address set by the user and other undocumented flags.
*/
#define IFA_F_SECONDARY 0x01
#define IFA_F_PERMANENT 0x02
/****************************************************************************
* Public Type Definitions
****************************************************************************/
/* Netlink socket address type. */
struct sockaddr_nl
{
sa_family_t nl_family; /* AF_NETLINK */
uint16_t nl_pad; /* Zero */
uint32_t nl_pid; /* Port ID */
uint32_t nl_groups; /* Multicast groups mask */
};
/* Packet structure. The Netlink message header, struct nlmsghdr, must be
* prepared by the caller. The Netlink socket generally works in a SOCK_RAW-
* like mode (even if SOCK_DGRAM was used to create it).
*
* The data portion then contains a subsystem-specific message that may be
* further nested.
*/
struct nlmsghdr
{
uint32_t nlmsg_len; /* Length of message including header */
uint16_t nlmsg_type; /* Message content */
uint16_t nlmsg_flags; /* Additional flags */
uint32_t nlmsg_seq; /* Sequence number */
uint32_t nlmsg_pid; /* Sending process port ID */
/* Data follows */
};
/* RTM_NEWLINK, RTM_DELLINK, RTM_GETLINK
*
* Create, remove or get information about a specific network interface.
* These messages contain an ifinfomsg structure followed by a series
* of rtattr structures.
*
* These attributes should be manipulated using only the RTA_*
*/
struct rtattr
{
uint16_t rta_len; /* Length of option */
uint16_t rta_type; /* Type of option */
/* Data follows */
};
struct ifinfomsg
{
uint8_t ifi_family; /* AF_UNSPEC */
uint16_t ifi_type; /* Device type */
int16_t ifi_index; /* Unique interface index */
uint32_t ifi_flags; /* Device flags */
uint32_t ifi_change; /* Change mask, must always be 0xffffffff */
};
/* RTM_NEWADDR, RTM_DELADDR, RTM_GETADDR
*
* Add, remove or receive information about an IP address associated with
* an interface. These messages contain an ifaddrmsg structure, optionally
* followed by rtattr routing attributes.
*/
struct ifaddrmsg
{
uint8_t ifa_family; /* Address type: AF_INET or AF_INET6 */
uint8_t ifa_prefixlen; /* Prefix length of address */
uint8_t ifa_flags; /* Address flags. See IFA_F_* definitions */
uint8_t ifa_scope; /* Address scope */
int16_t ifa_index; /* Unique interface index */
};
/****************************************************************************
* Public Function Prototypes
****************************************************************************/
#endif /* __INCLUDE_NETPACKET_NETLINK_H */

4
include/sys/socket.h
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@ -62,6 +62,7 @@
#define PF_BLUETOOTH 5 /* Bluetooth sockets */
#define PF_IEEE802154 6 /* Low level IEEE 802.15.4 radio frame interface */
#define PF_PKTRADIO 7 /* Low level packet radio interface */
#define PF_NETLINK 8 /* Netlink IPC socket */
/* Supported Address Families. Opengroup.org requires only AF_UNSPEC,
* AF_UNIX, AF_INET and AF_INET6.
@ -76,6 +77,7 @@
#define AF_BLUETOOTH PF_BLUETOOTH
#define AF_IEEE802154 PF_IEEE802154
#define AF_PKTRADIO PF_PKTRADIO
#define AF_NETLINK PF_NETLINK
/* The socket created by socket() has the indicated type, which specifies
* the communication semantics.
@ -194,7 +196,7 @@
* return: int
*/
/* Protocol-level socket operations */
/* Protocol-level socket operations. */
#define SOL_IP 1 /* See options in include/netinet/ip.h */
#define SOL_IPV6 2 /* See options in include/netinet/ip6.h */

2
net/Kconfig
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@ -87,7 +87,6 @@ config NET_SLIP_PKTSIZE
256 MSS, but restrict transfers to 128 bytes (possibly by modifying
the MSS value in the TCP connection structure).
config NET_GUARDSIZE
int "Driver I/O guard size"
default 2
@ -307,6 +306,7 @@ source "net/socket/Kconfig"
source "net/inet/Kconfig"
source "net/pkt/Kconfig"
source "net/local/Kconfig"
source "net/netlink/Kconfig"
source "net/tcp/Kconfig"
source "net/udp/Kconfig"
source "net/bluetooth/Kconfig"

1
net/Makefile
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@ -65,6 +65,7 @@ include neighbor/Make.defs
include igmp/Make.defs
include pkt/Make.defs
include local/Make.defs
include netlink/Make.defs
include tcp/Make.defs
include udp/Make.defs
include sixlowpan/Make.defs

1
net/README.txt
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@ -20,6 +20,7 @@ Directory Structure
+- loopback - Local loopback
+- neighbor - Neighbor Discovery Protocol (IPv6)
+- netdev - Socket network device interface
+- netlink - Netlink IPC socket interface
+- pkt - "Raw" packet socket support
+- sixlowpan - 6LoWPAN implementation
+- socket - BSD socket interface

7
net/net_initialize.c
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@ -60,6 +60,7 @@
#include "bluetooth/bluetooth.h"
#include "ieee802154/ieee802154.h"
#include "local/local.h"
#include "netlink/netlink.h"
#include "igmp/igmp.h"
#include "route/route.h"
#include "usrsock/usrsock.h"
@ -160,6 +161,12 @@ void net_setup(void)
local_initialize();
#endif
#ifdef CONFIG_NET_NETLINK
/* Initialize the Netlink IPC support */
netlink_initialize();
#endif
#ifdef NET_TCP_HAVE_STACK
/* Initialize the listening port structures */

26
net/netlink/Kconfig Normal file
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@ -0,0 +1,26 @@
#
# For a description of the syntax of this configuration file,
# see the file kconfig-language.txt in the NuttX tools repository.
#
config NET_NETLINK
bool "Netlink socket support"
default n
depends on EXPERIMENTAL
---help---
Enable support for Nelink-like IPC sockets that will permit user-
space applications to interact with network services.
This logic is a WIP. Currenlty only fragmentary support is
available, not enough to actually do antything of consequence.
Hence, the feature depends on EXPERIMENTAL.
if NET_NETLINK
config NET_NETLINK_CONNS
int "Number of netlink connections"
default 4
---help---
Maximum number of netlink connections (all tasks).
endif # NET_NETLINK

46
net/netlink/Make.defs Normal file
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@ -0,0 +1,46 @@
############################################################################
# net/netlink/Make.defs
#
# Copyright (C) 2018 Gregory Nutt. All rights reserved.
# Author: Gregory Nutt <gnutt@nuttx.org>
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
#
# 1. Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in
# the documentation and/or other materials provided with the
# distribution.
# 3. Neither the name NuttX nor the names of its contributors may be
# used to endorse or promote products derived from this software
# without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
# FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
# COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
# BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
# OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
# AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
# POSSIBILITY OF SUCH DAMAGE.
#
############################################################################
# Logic specific to IPv6 Neighbor Discovery Protocol
ifeq ($(CONFIG_NET_NETLINK),y)
SOCK_CSRCS += netlink_sockif.c netlink_conn.c
# Include netlink build support
DEPPATH += --dep-path netlink
VPATH += :netlink
endif

156
net/netlink/netlink.h Normal file
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@ -0,0 +1,156 @@
/****************************************************************************
* net/netlink/netlink.h
*
* Copyright (C) 2018 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name NuttX nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
****************************************************************************/
#ifndef __NET_NETLINK_NETLINK_H
#define __NET_NETLINK_NETLINK_H
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <sys/types.h>
#include <queue.h>
#include <semaphore.h>
#include "devif/devif.h"
#include "socket/socket.h"
#ifdef CONFIG_NET_NETLINK
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
/****************************************************************************
* Public Type Definitions
****************************************************************************/
struct netlink_conn_s
{
dq_entry_t node; /* Supports a doubly linked list */
uint8_t crefs; /* Reference counts on this instance */
/* Defines the list of netlink callbacks */
FAR struct devif_callback_s *list;
};
/****************************************************************************
* Public Data
****************************************************************************/
#ifdef __cplusplus
# define EXTERN extern "C"
extern "C"
{
#else
# define EXTERN extern
#endif
EXTERN const struct sock_intf_s g_netlink_sockif;
/****************************************************************************
* Public Function Prototypes
****************************************************************************/
/****************************************************************************
* Name: netlink_initialize()
*
* Description:
* Initialize the User Socket connection structures. Called once and only
* from the networking layer.
*
****************************************************************************/
void netlink_initialize(void);
/****************************************************************************
* Name: netlink_alloc()
*
* Description:
* Allocate a new, uninitialized netlink connection structure. This is
* normally something done by the implementation of the socket() API
*
****************************************************************************/
FAR struct netlink_conn_s *netlink_alloc(void);
/****************************************************************************
* Name: netlink_free()
*
* Description:
* Free a netlink connection structure that is no longer in use. This should
* be done by the implementation of close().
*
****************************************************************************/
void netlink_free(FAR struct netlink_conn_s *conn);
/****************************************************************************
* Name: netlink_nextconn()
*
* Description:
* Traverse the list of allocated netlink connections
*
* Assumptions:
* This function is called from netlink device logic.
*
****************************************************************************/
FAR struct netlink_conn_s *netlink_nextconn(FAR struct netlink_conn_s *conn);
/****************************************************************************
* Name: netlink_active()
*
* Description:
* Find a connection structure that is the appropriate connection for the
* provided netlink address
*
* Assumptions:
*
****************************************************************************/
struct sockaddr_nl; /* Forward reference */
FAR struct netlink_conn_s *netlink_active(FAR struct sockaddr_nl *addr);
#undef EXTERN
#ifdef __cplusplus
}
#endif
#endif /* CONFIG_NET_NETLINK */
#endif /* __NET_NETLINK_NETLINK_H */

246
net/netlink/netlink_conn.c Normal file
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@ -0,0 +1,246 @@
/****************************************************************************
* net/netlink/netlink_conn.c
*
* Copyright (C) 2018 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name NuttX nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <stdint.h>
#include <string.h>
#include <assert.h>
#include <errno.h>
#include <debug.h>
#include <arch/irq.h>
#include <nuttx/semaphore.h>
#include <nuttx/net/netconfig.h>
#include <nuttx/net/net.h>
#include "netlink/netlink.h"
#ifdef CONFIG_NET_NETLINK
/****************************************************************************
* Private Data
****************************************************************************/
/* The array containing all netlink connections. */
static struct netlink_conn_s g_netlink_connections[CONFIG_NET_NETLINK_CONNS];
/* A list of all free netlink connections */
static dq_queue_t g_free_netlink_connections;
static sem_t g_free_sem;
/* A list of all allocated netlink connections */
static dq_queue_t g_active_netlink_connections;
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Name: _netlink_semtake() and _netlink_semgive()
*
* Description:
* Take/give semaphore
*
****************************************************************************/
static void _netlink_semtake(FAR sem_t *sem)
{
int ret;
/* Take the semaphore (perhaps waiting) */
while ((ret = net_lockedwait(sem)) < 0)
{
/* The only case that an error should occur here is if
* the wait was awakened by a signal.
*/
DEBUGASSERT(ret == -EINTR || ret == -ECANCELED);
}
}
static void _netlink_semgive(FAR sem_t *sem)
{
(void)nxsem_post(sem);
}
/****************************************************************************
* Public Functions
****************************************************************************/
/****************************************************************************
* Name: netlink_initialize()
*
* Description:
* Initialize the User Socket connection structures. Called once and only
* from the networking layer.
*
****************************************************************************/
void netlink_initialize(void)
{
int i;
/* Initialize the queues */
dq_init(&g_free_netlink_connections);
dq_init(&g_active_netlink_connections);
nxsem_init(&g_free_sem, 0, 1);
for (i = 0; i < CONFIG_NET_NETLINK_CONNS; i++)
{
FAR struct netlink_conn_s *conn = &g_netlink_connections[i];
/* Mark the connection closed and move it to the free list */
memset(conn, 0, sizeof(*conn));
dq_addlast(&conn->node, &g_free_netlink_connections);
}
}
/****************************************************************************
* Name: netlink_alloc()
*
* Description:
* Allocate a new, uninitialized netlink connection structure. This is
* normally something done by the implementation of the socket() API
*
****************************************************************************/
FAR struct netlink_conn_s *netlink_alloc(void)
{
FAR struct netlink_conn_s *conn;
/* The free list is protected by a semaphore (that behaves like a mutex). */
_netlink_semtake(&g_free_sem);
conn = (FAR struct netlink_conn_s *)dq_remfirst(&g_free_netlink_connections);
if (conn)
{
/* Make sure that the connection is marked as uninitialized */
memset(conn, 0, sizeof(*conn));
/* Enqueue the connection into the active list */
dq_addlast(&conn->node, &g_active_netlink_connections);
}
_netlink_semgive(&g_free_sem);
return conn;
}
/****************************************************************************
* Name: netlink_free()
*
* Description:
* Free a netlink connection structure that is no longer in use. This should
* be done by the implementation of close().
*
****************************************************************************/
void netlink_free(FAR struct netlink_conn_s *conn)
{
/* The free list is protected by a semaphore (that behaves like a mutex). */
DEBUGASSERT(conn->crefs == 0);
_netlink_semtake(&g_free_sem);
/* Remove the connection from the active list */
dq_rem(&conn->node, &g_active_netlink_connections);
/* Reset structure */
memset(conn, 0, sizeof(*conn));
/* Free the connection */
dq_addlast(&conn->node, &g_free_netlink_connections);
_netlink_semgive(&g_free_sem);
}
/****************************************************************************
* Name: netlink_nextconn()
*
* Description:
* Traverse the list of allocated netlink connections
*
* Assumptions:
* This function is called from netlink device logic.
*
****************************************************************************/
FAR struct netlink_conn_s *netlink_nextconn(FAR struct netlink_conn_s *conn)
{
if (conn == NULL)
{
return (FAR struct netlink_conn_s *)g_active_netlink_connections.head;
}
else
{
return (FAR struct netlink_conn_s *)conn->node.flink;
}
}
/****************************************************************************
* Name: netlink_active()
*
* Description:
* Find a connection structure that is the appropriate connection for the
* provided netlink address
*
* Assumptions:
*
****************************************************************************/
FAR struct netlink_conn_s *netlink_active(FAR struct sockaddr_nl *addr)
{
FAR struct netlink_conn_s *conn = NULL;
#warning "Missing logic for NETLINK active"
return NULL;
}
#endif /* CONFIG_NET_NETLINK */

585
net/netlink/netlink_sockif.c Normal file
View File

@ -0,0 +1,585 @@
/****************************************************************************
* net/netlink/netlink_sockif.c
*
* Copyright (C) 2018 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided with the
* distribution.
* 3. Neither the name NuttX nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include <nuttx/config.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <stdbool.h>
#include <assert.h>
#include <errno.h>
#include <debug.h>
#include <nuttx/net/net.h>
#include "netlink/netlink.h"
#ifdef CONFIG_NET_NETLINK
/****************************************************************************
* Private Function Prototypes
****************************************************************************/
static int netlink_setup(FAR struct socket *psock, int protocol);
static sockcaps_t netlink_sockcaps(FAR struct socket *psock);
static void netlink_addref(FAR struct socket *psock);
static int netlink_bind(FAR struct socket *psock,
FAR const struct sockaddr *addr, socklen_t addrlen);
static int netlink_getsockname(FAR struct socket *psock,
FAR struct sockaddr *addr, FAR socklen_t *addrlen);
static int netlink_getpeername(FAR struct socket *psock,
FAR struct sockaddr *addr, FAR socklen_t *addrlen);
static int netlink_listen(FAR struct socket *psock, int backlog);
static int netlink_connect(FAR struct socket *psock,
FAR const struct sockaddr *addr, socklen_t addrlen);
static int netlink_accept(FAR struct socket *psock, FAR struct sockaddr *addr,
FAR socklen_t *addrlen, FAR struct socket *newsock);
#ifndef CONFIG_DISABLE_POLL
static int netlink_poll(FAR struct socket *psock, FAR struct pollfd *fds,
bool setup);
#endif
static ssize_t netlink_send(FAR struct socket *psock,
FAR const void *buf, size_t len, int flags);
static ssize_t netlink_sendto(FAR struct socket *psock, FAR const void *buf,
size_t len, int flags, FAR const struct sockaddr *to,
socklen_t tolen);
static ssize_t netlink_recvfrom(FAR struct socket *psock, FAR void *buf,
size_t len, int flags, FAR struct sockaddr *from,
FAR socklen_t *fromlen);
static int netlink_close(FAR struct socket *psock);
/****************************************************************************
* Public Data
****************************************************************************/
const struct sock_intf_s g_netlink_sockif =
{
netlink_setup, /* si_setup */
netlink_sockcaps, /* si_sockcaps */
netlink_addref, /* si_addref */
netlink_bind, /* si_bind */
netlink_getsockname, /* si_getsockname */
netlink_getpeername, /* si_getpeername */
netlink_listen, /* si_listen */
netlink_connect, /* si_connect */
netlink_accept, /* si_accept */
#ifndef CONFIG_DISABLE_POLL
netlink_poll, /* si_poll */
#endif
netlink_send, /* si_send */
netlink_sendto, /* si_sendto */
#ifdef CONFIG_NET_SENDFILE
NULL, /* si_sendfile */
#endif
netlink_recvfrom, /* si_recvfrom */
netlink_close /* si_close */
};
/****************************************************************************
* Private Functions
****************************************************************************/
/****************************************************************************
* Name: inet_setup
*
* Description:
* Called for socket() to verify that the provided socket type and
* protocol are usable by this address family. Perform any family-
* specific socket fields.
*
* Input Parameters:
* psock A pointer to a user allocated socket structure to be initialized.
* protocol (see sys/socket.h)
*
* Returned Value:
* Zero (OK) is returned on success. Otherwise, a negater errno value is
* returned.
*
****************************************************************************/
static int netlink_setup(FAR struct socket *psock, int protocol)
{
int domain = psock->s_domain;
int type = psock->s_type;
int ret;
if (domain == PF_NETLINK && (type == SOCK_RAW || type == SOCK_DGRAM))
{
ret = OK;
}
else
{
return -ENETDOWN;
}
psock->s_conn = NULL;
return ret;
}
/****************************************************************************
* Name: netlink_sockcaps
*
* Description:
* Return the bit encoded capabilities of this socket.
*
* Input Parameters:
* psock - Socket structure of the socket whose capabilities are being
* queried.
*
* Returned Value:
* The non-negative set of socket capabilities is returned.
*
****************************************************************************/
static sockcaps_t netlink_sockcaps(FAR struct socket *psock)
{
return 0;
}
/****************************************************************************
* Name: netlink_addref
*
* Description:
* Increment the reference count on the underlying connection structure.
*
* Input Parameters:
* psock - Socket structure of the socket whose reference count will be
* incremented.
*
* Returned Value:
* None
*
****************************************************************************/
static void netlink_addref(FAR struct socket *psock)
{
FAR struct netlink_conn_s *conn;
DEBUGASSERT(psock != NULL && psock->s_conn != NULL);
conn = psock->s_conn;
DEBUGASSERT(conn->crefs > 0 && conn->crefs < 255);
conn->crefs++;
}
/****************************************************************************
* Name: netlink_bind
*
* Description:
* netlink_bind() gives the socket 'conn' the local address 'addr'. 'addr'
* is 'addrlen' bytes long. Traditionally, this is called "assigning a name
* to a socket." When a socket is created with socket, it exists in a name
* space (address family) but has no name assigned.
*
* Input Parameters:
* conn netlink socket connection structure
* addr Socket local address
* addrlen Length of 'addr'
*
* Returned Value:
* 0 on success; -1 on error with errno set appropriately
*
* EACCES
* The address is protected, and the user is not the superuser.
* EADDRINUSE
* The given address is already in use.
* EINVAL
* The socket is already bound to an address.
* ENOTSOCK
* psock is a descriptor for a file, not a socket.
*
* Assumptions:
*
****************************************************************************/
static int netlink_bind(FAR struct socket *psock,
FAR const struct sockaddr *addr, socklen_t addrlen)
{
#warning Missing logic for NETLINK bind
return -EOPNOTSUPP;
}
/****************************************************************************
* Name: netlink_getsockname
*
* Description:
* The getsockname() function retrieves the locally-bound name of the
* specified socket, stores this address in the sockaddr structure pointed
* to by the 'addr' argument, and stores the length of this address in the
* object pointed to by the 'addrlen' argument.
*
* If the actual length of the address is greater than the length of the
* supplied sockaddr structure, the stored address will be truncated.
*
* If the socket has not been bound to a local name, the value stored in
* the object pointed to by address is unspecified.
*
* Input Parameters:
* conn netlink socket connection structure
* addr sockaddr structure to receive data [out]
* addrlen Length of sockaddr structure [in/out]
*
****************************************************************************/
static int netlink_getsockname(FAR struct socket *psock,
FAR struct sockaddr *addr,
FAR socklen_t *addrlen)
{
#warning Missing logic for NETLINK getsockname
return -EOPNOTSUPP;
}
/****************************************************************************
* Name: netlink_getpeername
*
* Description:
* The netlink_getpeername() function retrieves the remote-connected name
* of the specified packet socket, stores this address in the sockaddr
* structure pointed to by the 'addr' argument, and stores the length of
* this address in the object pointed to by the 'addrlen' argument.
*
* If the actual length of the address is greater than the length of the
* supplied sockaddr structure, the stored address will be truncated.
*
* If the socket has not been bound to a local name, the value stored in
* the object pointed to by address is unspecified.
*
* Parameters:
* psock Socket structure of the socket to be queried
* addr sockaddr structure to receive data [out]
* addrlen Length of sockaddr structure [in/out]
*
* Returned Value:
* On success, 0 is returned, the 'addr' argument points to the address
* of the socket, and the 'addrlen' argument points to the length of the
* address. Otherwise, a negated errno value is returned. See
* getpeername() for the list of appropriate error numbers.
*
****************************************************************************/
static int netlink_getpeername(FAR struct socket *psock,
FAR struct sockaddr *addr,
FAR socklen_t *addrlen)
{
#warning Missing logic for NETLINK getsockname
return -EOPNOTSUPP;
//return -EAFNOSUPPORT;
}
/****************************************************************************
* Name: netlink_listen
*
* Description:
* To accept connections, a socket is first created with psock_socket(), a
* willingness to accept incoming connections and a queue limit for
* incoming connections are specified with psock_listen(), and then the
* connections are accepted with psock_accept(). For the case of AFINET
* and AFINET6 sockets, psock_listen() calls this function. The
* psock_listen() call applies only to sockets of type SOCK_STREAM or
* SOCK_SEQPACKET.
*
* Input Parameters:
* psock Reference to an internal, bound socket structure.
* backlog The maximum length the queue of pending connections may grow.
* If a connection request arrives with the queue full, the client
* may receive an error with an indication of ECONNREFUSED or,
* if the underlying protocol supports retransmission, the request
* may be ignored so that retries succeed.
*
* Returned Value:
* On success, zero is returned. On error, a negated errno value is
* returned. See list() for the set of appropriate error values.
*
****************************************************************************/
static int netlink_listen(FAR struct socket *psock, int backlog)
{
#warning Missing logic for NETLINK listen
return -EOPNOTSUPP;
}
/****************************************************************************
* Name: netlink_connect
*
* Description:
* Perform a netlink connection
*
* Input Parameters:
* psock A reference to the socket structure of the socket to be connected
* addr The address of the remote server to connect to
* addrlen Length of address buffer
*
* Returned Value:
* None
*
* Assumptions:
*
****************************************************************************/
static int netlink_connect(FAR struct socket *psock,
FAR const struct sockaddr *addr,
socklen_t addrlen)
{
#warning Missing logic for NETLINK connect
return -EOPNOTSUPP;
}
/****************************************************************************
* Name: netlink_accept
*
* Description:
* The netlink_accept function is used with connection-based socket
* types (SOCK_STREAM, SOCK_SEQPACKET and SOCK_RDM). It extracts the first
* connection request on the queue of pending connections, creates a new
* connected socket with mostly the same properties as 'sockfd', and
* allocates a new socket descriptor for the socket, which is returned. The
* newly created socket is no longer in the listening state. The original
* socket 'sockfd' is unaffected by this call. Per file descriptor flags
* are not inherited across an inet_accept.
*
* The 'sockfd' argument is a socket descriptor that has been created with
* socket(), bound to a local address with bind(), and is listening for
* connections after a call to listen().
*
* On return, the 'addr' structure is filled in with the address of the
* connecting entity. The 'addrlen' argument initially contains the size
* of the structure pointed to by 'addr'; on return it will contain the
* actual length of the address returned.
*
* If no pending connections are present on the queue, and the socket is
* not marked as non-blocking, inet_accept blocks the caller until a
* connection is present. If the socket is marked non-blocking and no
* pending connections are present on the queue, inet_accept returns
* EAGAIN.
*
* Input Parameters:
* psock Reference to the listening socket structure
* addr Receives the address of the connecting client
* addrlen Input: allocated size of 'addr', Return: returned size of 'addr'
* newsock Location to return the accepted socket information.
*
* Returned Value:
* Returns 0 (OK) on success. On failure, it returns a negated errno
* value. See accept() for a desrciption of the approriate error value.
*
* Assumptions:
* The network is locked.
*
****************************************************************************/
static int netlink_accept(FAR struct socket *psock, FAR struct sockaddr *addr,
FAR socklen_t *addrlen, FAR struct socket *newsock)
{
#warning Missing logic for NETLINK accept
return -EOPNOTSUPP;
}
/****************************************************************************
* Name: netlink_poll
*
* Description:
* The standard poll() operation redirects operations on socket descriptors
* to this function.
*
* Input Parameters:
* psock - An instance of the internal socket structure.
* fds - The structure describing the events to be monitored.
* setup - true: Setup up the poll; false: Teardown the poll
*
* Returned Value:
* 0: Success; Negated errno on failure
*
****************************************************************************/
#ifndef CONFIG_DISABLE_POLL
static int netlink_poll(FAR struct socket *psock, FAR struct pollfd *fds,
bool setup)
{
#warning Missing logic for NETLINK poll
return -EOPNOTSUPP;
}
#endif
/****************************************************************************
* Name: netlink_send
*
* Description:
* The netlink_send() call may be used only when the socket is in
* a connected state (so that the intended recipient is known).
*
* Input Parameters:
* psock An instance of the internal socket structure.
* buf Data to send
* len Length of data to send
* flags Send flags (ignored)
*
* Returned Value:
* On success, returns the number of characters sent. On error, a negated
* errno value is returned (see send() for the list of appropriate error
* values.
*
****************************************************************************/
static ssize_t netlink_send(FAR struct socket *psock,
FAR const void *buf,
size_t len, int flags)
{
#warning Missing logic for NETLINK send
return -EOPNOTSUPP;
}
/****************************************************************************
* Name: netlink_sendto
*
* Description:
* If sendto() is used on a connection-mode (SOCK_STREAM, SOCK_SEQPACKET)
* socket, the parameters to and 'tolen' are ignored (and the error EISCONN
* may be returned when they are not NULL and 0), and the error ENOTCONN is
* returned when the socket was not actually connected.
*
* Input Parameters:
* psock A reference to the socket structure of the socket to be connected
* buf Data to send
* len Length of data to send
* flags Send flags (ignored)
* to Address of recipient
* tolen The length of the address structure
*
* Returned Value:
* None
*
* Assumptions:
*
****************************************************************************/
static ssize_t netlink_sendto(FAR struct socket *psock, FAR const void *buf,
size_t len, int flags,
FAR const struct sockaddr *to, socklen_t tolen)
{
#warning Missing logic for NETLINK sendto
return -EOPNOTSUPP;
}
/****************************************************************************
* Name: netlink_recvfrom
*
* Description:
* recvfrom() receives messages from a socket, and may be used to receive
* data on a socket whether or not it is connection-oriented.
*
* If from is not NULL, and the underlying protocol provides the source
* address, this source address is filled in. The argument fromlen
* initialized to the size of the buffer associated with from, and modified
* on return to indicate the actual size of the address stored there.
*
* Input Parameters:
* psock A pointer to a NuttX-specific, internal socket structure
* buf Buffer to receive data
* len Length of buffer
* flags Receive flags (ignored)
* from Address of source (may be NULL)
* fromlen The length of the address structure
*
****************************************************************************/
static ssize_t netlink_recvfrom(FAR struct socket *psock, FAR void *buf,
size_t len, int flags,
FAR struct sockaddr *from,
FAR socklen_t *fromlen)
{
#warning Missing logic for NETLINK recvfrom
return -EOPNOTSUPP;
}
/****************************************************************************
* Name: netlink_close
*
* Description:
* Performs the close operation on an NETLINK socket instance
*
* Input Parameters:
* psock Socket instance
*
* Returned Value:
* 0 on success; -1 on error with errno set appropriately.
*
* Assumptions:
*
****************************************************************************/
static int netlink_close(FAR struct socket *psock)
{
FAR struct netlink_conn_s *conn = psock->s_conn;
int ret;
/* Perform some pre-close operations for the NETLINK socket type. */
/* Is this the last reference to the connection structure (there
* could be more if the socket was dup'ed).
*/
if (conn->crefs <= 1)
{
/* Yes... inform user-space daemon of socket close. */
#warning Missing logic
/* Free the connection structure */
conn->crefs = 0;
netlink_free(psock->s_conn);
if (ret < 0)
{
/* Return with error code, but free resources. */
nerr("ERROR: netlink_close failed: %d\n", ret);
return ret;
}
}
else
{
/* No.. Just decrement the reference count */
conn->crefs--;
}
return OK;
}
#endif /* CONFIG_NET_NETLINK */

7
net/socket/net_sockif.c
View File

@ -47,6 +47,7 @@
#include "inet/inet.h"
#include "local/local.h"
#include "netlink/netlink.h"
#include "pkt/pkt.h"
#include "bluetooth/bluetooth.h"
#include "ieee802154/ieee802154.h"
@ -103,6 +104,12 @@ FAR const struct sock_intf_s *
break;
#endif
#ifdef CONFIG_NET_NETLINK
case PF_NETLINK:
sockif = &g_netlink_sockif;
break;
#endif
#ifdef CONFIG_NET_PKT
case PF_PACKET:
sockif = &g_pkt_sockif;