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net/vsock: add AF_VSOCK address family

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Add AF_VSOCK address family support, This is the vsock framework
preparation patch.

Signed-off-by: Bowen Wang <wangbowen6@xiaomi.com>
This commit is contained in:
Bowen Wang
2024-03-19 15:17:08 +08:00
committed by Xiang Xiao
parent 7ab27ec1c8
commit b5b0430c39
3 changed files with 287 additions and 7 deletions
Download Patch File Download Diff File Expand all files Collapse all files

206
include/netpacket/vm_sockets.h Normal file
View File

@@ -0,0 +1,206 @@
/****************************************************************************
* include/netpacket/vm_sockets.h
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership. The
* ASF licenses this file to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance with the
* License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations
* under the License.
*
****************************************************************************/
#ifndef __INCLUDE_NETPACKET_VM_SOCKETS_H
#define __INCLUDE_NETPACKET_VM_SOCKETS_H
/****************************************************************************
* Included Files
****************************************************************************/
#include <sys/types.h>
#include <nuttx/fs/ioctl.h>
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
/* Option name for STREAM socket buffer size. Use as the option name in
* setsockopt(3) or getsockopt(3) to set or get an unsigned long long that
* specifies the size of the buffer underlying a vSockets STREAM socket.
* Value is clamped to the MIN and MAX.
*/
#define SO_VM_SOCKETS_BUFFER_SIZE 0
/* Option name for STREAM socket minimum buffer size. Use as the option name
* in setsockopt(3) or getsockopt(3) to set or get an unsigned long long that
* specifies the minimum size allowed for the buffer underlying a vSockets
* STREAM socket.
*/
#define SO_VM_SOCKETS_BUFFER_MIN_SIZE 1
/* Option name for STREAM socket maximum buffer size. Use as the option name
* in setsockopt(3) or getsockopt(3) to set or get an unsigned long long
* that specifies the maximum size allowed for the buffer underlying a
* vSockets STREAM socket.
*/
#define SO_VM_SOCKETS_BUFFER_MAX_SIZE 2
/* Option name for socket peer's host-specific VM ID. Use as the option name
* in getsockopt(3) to get a host-specific identifier for the peer endpoint's
* VM. The identifier is a signed integer.
* Only available for hypervisor endpoints.
*/
#define SO_VM_SOCKETS_PEER_HOST_VM_ID 3
/* Option name for determining if a socket is trusted. Use as the option
* name in getsockopt(3) to determine if a socket is trusted. The value is a
* signed integer.
*/
#define SO_VM_SOCKETS_TRUSTED 5
/* Option name for using non-blocking send/receive. Use as the option name
* for setsockopt(3) or getsockopt(3) to set or get the non-blocking
* transmit/receive flag for a STREAM socket. This flag determines whether
* send() and recv() can be called in non-blocking contexts for the given
* socket. The value is a signed integer.
*
* This option is only relevant to kernel endpoints, where descheduling the
* thread of execution is not allowed, for example, while holding a spinlock.
* It is not to be confused with conventional non-blocking socket operations.
*
* Only available for hypervisor endpoints.
*/
#define SO_VM_SOCKETS_NONBLOCK_TXRX 7
/* Option name for STREAM socket connection timeout. Use as the option name
* in setsockopt(3) or getsockopt(3) to set or get the connection
* timeout for a STREAM socket.
*/
#define SO_VM_SOCKETS_CONNECT_TIMEOUT 8
/* The vSocket equivalent of INADDR_ANY. This works for the svm_cid field of
* sockaddr_vm and indicates the context ID of the current endpoint.
*/
#define VMADDR_CID_ANY -1u
/* Bind to any available port. Works for the svm_port field of
* sockaddr_vm.
*/
#define VMADDR_PORT_ANY -1u
/* Use this as the destination CID in an address when referring to the
* hypervisor. VMCI relies on it being 0, but this would be useful for other
* transports too.
*/
#define VMADDR_CID_HYPERVISOR 0
/* Use this as the destination CID in an address when referring to the
* local communication (loopback).
* (This was VMADDR_CID_RESERVED, but even VMCI doesn't use it anymore,
* it was a legacy value from an older release).
*/
#define VMADDR_CID_LOCAL 1
/* Use this as the destination CID in an address when referring to the host
* (any process other than the hypervisor). VMCI relies on it being 2, but
* this would be useful for other transports too.
*/
#define VMADDR_CID_HOST 2
/* The current default use case for the vsock channel is the following:
* local vsock communication between guest and host and nested VMs setup.
* In addition to this, implicitly, the vsock packets are forwarded to the
* host if no host->guest vsock transport is set.
*
* Set this flag value in the sockaddr_vm corresponding field if the vsock
* packets need to be always forwarded to the host. Using this behavior,
* vsock communication between sibling VMs can be setup.
*
* This way can explicitly distinguish between vsock channels created for
* different use cases, such as nested VMs (or local communication between
* guest and host) and sibling VMs.
*
* The flag can be set in the connect logic in the user space application
* flow. In the listen logic (from kernel space) the flag is set on the
* remote peer address. This happens for an incoming connection when it is
* routed from the host and comes from the guest (local CID and
* remote CID > VMADDR_CID_HOST).
*/
#define VMADDR_FLAG_TO_HOST 0x01
/* Invalid vSockets version. */
#define VM_SOCKETS_INVALID_VERSION -1u
/* The epoch (first) component of the vSockets version. A single byte
* representing the epoch component of the vSockets version.
*/
#define VM_SOCKETS_VERSION_EPOCH(v) (((v) & 0xFF000000) >> 24)
/* The major (second) component of the vSockets version. A single byte
* representing the major component of the vSockets version. Typically
* changes for every major release of a product.
*/
#define VM_SOCKETS_VERSION_MAJOR(v) (((v) & 0x00FF0000) >> 16)
/* The minor (third) component of the vSockets version. Two bytes
* representing the minor component of the vSockets version.
*/
#define VM_SOCKETS_VERSION_MINOR(v) (((v) & 0x0000FFFF))
/* vSocket get local cid ioctl command */
#define IOCTL_VM_SOCKETS_GET_LOCAL_CID _SIOC(0x0040)
/****************************************************************************
* Public Types
****************************************************************************/
/* Address structure for vSockets. The address family should be set to
* AF_VSOCK. The structure members should all align on their natural
* boundaries without resorting to compiler packing directives. The total
* size of this structure should be exactly the same as that of
* struct sockaddr.
*/
struct sockaddr_vm
{
sa_family_t svm_family;
unsigned short svm_reserved1;
unsigned int svm_port;
unsigned int svm_cid;
uint8_t svm_flags;
unsigned char svm_zero[sizeof(struct sockaddr) -
sizeof(sa_family_t) -
sizeof(unsigned short) -
sizeof(unsigned int) -
sizeof(unsigned int) -
sizeof(uint8_t)];
};
#endif /* __INCLUDE_NETPACKET_VM_SOCKETS_H */

2
include/sys/socket.h
View File

@@ -52,6 +52,7 @@
#define PF_CAN 29 /* Controller Area Network (SocketCAN) */
#define PF_BLUETOOTH 31 /* Bluetooth sockets */
#define PF_IEEE802154 36 /* Low level IEEE 802.15.4 radio frame interface */
#define PF_VSOCK 40 /* vSockets */
#define PF_PKTRADIO 64 /* Low level packet radio interface */
#define PF_RPMSG 65 /* Remote core communication */
@@ -70,6 +71,7 @@
#define AF_CAN PF_CAN
#define AF_BLUETOOTH PF_BLUETOOTH
#define AF_IEEE802154 PF_IEEE802154
#define AF_VSOCK PF_VSOCK
#define AF_PKTRADIO PF_PKTRADIO
#define AF_RPMSG PF_RPMSG

86
libs/libc/netdb/lib_getaddrinfo.c
View File

@@ -26,11 +26,13 @@
#include <nuttx/config.h>
#include <stdlib.h>
#include <string.h>
#include <arpa/inet.h>
#include <nuttx/net/loopback.h>
#include <netpacket/rpmsg.h>
#include <netpacket/vm_sockets.h>
#include <netdb.h>
#include <sys/un.h>
@@ -50,6 +52,7 @@ struct ai_s
struct sockaddr_in sin;
struct sockaddr_in6 sin6;
struct sockaddr_rpmsg srp;
struct sockaddr_vm svm;
} sa;
};
@@ -105,6 +108,14 @@ FAR static struct ai_s *alloc_ai(int family, int socktype, int protocol,
strlcpy(ai->sa.srp.rp_cpu, addr, sizeof(ai->sa.srp.rp_cpu));
snprintf(ai->sa.srp.rp_name, sizeof(ai->sa.srp.rp_name), "%d", port);
break;
#endif
#ifdef CONFIG_NET_VSOCK
case AF_VSOCK:
ai->ai.ai_addrlen = sizeof(struct sockaddr_vm);
ai->sa.svm.svm_family = AF_VSOCK;
ai->sa.svm.svm_cid = strtoul(addr, NULL, 0);
ai->sa.svm.svm_port = ntohl(port);
break;
#endif
}
@@ -158,6 +169,7 @@ int getaddrinfo(FAR const char *hostname, FAR const char *servname,
family != AF_INET6 &&
family != AF_LOCAL &&
family != AF_RPMSG &&
family != AF_VSOCK &&
family != AF_UNSPEC)
{
return EAI_FAMILY;
@@ -201,13 +213,11 @@ int getaddrinfo(FAR const char *hostname, FAR const char *servname,
if ((flags & AI_PASSIVE) != 0 && hostname == NULL)
{
struct in6_addr addr;
memset(&addr, 0, sizeof(struct in6_addr));
#ifdef CONFIG_NET_IPv4
if (family == AF_INET || family == AF_UNSPEC)
{
struct in_addr addr;
memset(&addr, 0, sizeof(struct in_addr));
ai = alloc_ai(AF_INET, socktype, proto, port, &addr);
if (ai != NULL)
{
@@ -219,6 +229,8 @@ int getaddrinfo(FAR const char *hostname, FAR const char *servname,
#ifdef CONFIG_NET_IPv6
if (family == AF_INET6 || family == AF_UNSPEC)
{
struct in6_addr addr;
memset(&addr, 0, sizeof(struct in6_addr));
ai = alloc_ai(AF_INET6, socktype, proto, port, &addr);
if (ai != NULL)
{
@@ -236,6 +248,44 @@ int getaddrinfo(FAR const char *hostname, FAR const char *servname,
}
#endif
#if defined(CONFIG_NET_RPMSG)
if (family == AF_RPMSG || family == AF_UNSPEC)
{
ai = alloc_ai(AF_RPMSG, socktype, proto, port, "");
if (ai != NULL)
{
if (*res != NULL)
{
(*res)->ai_next = (FAR struct addrinfo *)ai;
}
else
{
*res = (FAR struct addrinfo *)ai;
}
}
}
#endif
#if defined(CONFIG_NET_VSOCK)
if (family == AF_VSOCK || family == AF_UNSPEC)
{
/* "-1" <--> VMADDR_CID_ANY */
ai = alloc_ai(AF_VSOCK, socktype, proto, port, "-1");
if (ai != NULL)
{
if (*res != NULL)
{
(*res)->ai_next = (FAR struct addrinfo *)ai;
}
else
{
*res = (FAR struct addrinfo *)ai;
}
}
}
#endif
return (*res != NULL) ? OK : EAI_MEMORY;
}
@@ -276,17 +326,39 @@ int getaddrinfo(FAR const char *hostname, FAR const char *servname,
}
}
#endif
#endif
#if defined(CONFIG_NET_VSOCK)
if (family == AF_VSOCK || family == AF_UNSPEC)
{
/* "1" <--> VMADDR_CID_LOCAL */
ai = alloc_ai(AF_VSOCK, socktype, proto, port, "1");
if (ai != NULL)
{
if (*res != NULL)
{
(*res)->ai_next = (FAR struct addrinfo *)ai;
}
else
{
*res = (FAR struct addrinfo *)ai;
}
}
}
#endif
#if defined(CONFIG_NET_LOOPBACK) || defined(CONFIG_NET_VSOCK)
return (*res != NULL) ? OK : EAI_MEMORY;
#else
/* Local service, but no loopback so cannot succeed. */
return EAI_FAIL;
#endif /* CONFIG_NET_LOOPBACK */
#endif
}
#if defined(CONFIG_NET_LOCAL) || defined(CONFIG_NET_RPMSG)
if (family == AF_LOCAL || family == AF_RPMSG)
#if defined(CONFIG_NET_LOCAL) || defined(CONFIG_NET_RPMSG) || defined(CONFIG_NET_VSOCK)
if (family == AF_LOCAL || family == AF_RPMSG || family == AF_VSOCK)
{
ai = alloc_ai(family, socktype, proto, port, hostname);
if (ai != NULL)