第17章 ioctl操作

#include <sys/ioctl.h>int ioctl(int fd, unsigned long request, ...);

/usr/src/linux-headers-4.10.0-35/include/uapi/linux/if.h

/* * INETAn implementation of the TCP/IP protocol suite for the LINUX *operating system.  INET is implemented using the  BSD Socket *interface as the means of communication with the user level. * *Global definitions for the INET interface module. * * Version:@(#)if.h1.0.204/18/93 * * Authors:Original taken from Berkeley UNIX 4.3, (c) UCB 1982-1988 *Ross Biro *Fred N. van Kempen, <[e-mail]> * *This program is free software; you can redistribute it and/or *modify it under the terms of the GNU General Public License *as published by the Free Software Foundation; either version *2 of the License, or (at your option) any later version. */#ifndef _LINUX_IF_H#define _LINUX_IF_H#include <linux/libc-compat.h>          /* for compatibility with glibc */#include <linux/types.h>/* for "__kernel_caddr_t" et al*/#include <linux/socket.h>/* for "struct sockaddr" et al*/#include <linux/compiler.h>/* for "__user" et al           */#if __UAPI_DEF_IF_IFNAMSIZ#defineIFNAMSIZ16#endif /* __UAPI_DEF_IF_IFNAMSIZ */#defineIFALIASZ256#include <linux/hdlc/ioctl.h>/* For glibc compatibility. An empty enum does not compile. */#if __UAPI_DEF_IF_NET_DEVICE_FLAGS_LOWER_UP_DORMANT_ECHO != 0 || \                                                            __UAPI_DEF_IF_NET_DEVICE_FLAGS != 0/** * enum net_device_flags - &struct net_device flags * * These are the &struct net_device flags, they can be set by drivers, the * kernel and some can be triggered by userspace. Userspace can query and * set these flags using userspace utilities but there is also a sysfs * entry available for all dev flags which can be queried and set. These flags * are shared for all types of net_devices. The sysfs entries are available * via /sys/class/net/<dev>/flags. Flags which can be toggled through sysfs * are annotated below, note that only a few flags can be toggled and some * other flags are always preserved from the original net_device flags * even if you try to set them via sysfs. Flags which are always preserved * are kept under the flag grouping @IFF_VOLATILE. Flags which are volatile * are annotated below as such. * * You should have a pretty good reason to be extending these flags. * * @IFF_UP: interface is up. Can be toggled through sysfs. * @IFF_BROADCAST: broadcast address valid. Volatile. * @IFF_DEBUG: turn on debugging. Can be toggled through sysfs. * @IFF_LOOPBACK: is a loopback net. Volatile. * @IFF_POINTOPOINT: interface is has p-p link. Volatile. * @IFF_NOTRAILERS: avoid use of trailers. Can be toggled through sysfs. *Volatile. * @IFF_RUNNING: interface RFC2863 OPER_UP. Volatile. * @IFF_NOARP: no ARP protocol. Can be toggled through sysfs. Volatile. * @IFF_PROMISC: receive all packets. Can be toggled through sysfs. * @IFF_ALLMULTI: receive all multicast packets. Can be toggled through *sysfs. * @IFF_MASTER: master of a load balancer. Volatile. * @IFF_SLAVE: slave of a load balancer. Volatile. * @IFF_MULTICAST: Supports multicast. Can be toggled through sysfs. * @IFF_PORTSEL: can set media type. Can be toggled through sysfs. * @IFF_AUTOMEDIA: auto media select active. Can be toggled through sysfs. * @IFF_DYNAMIC: dialup device with changing addresses. Can be toggled *through sysfs. * @IFF_LOWER_UP: driver signals L1 up. Volatile. * @IFF_DORMANT: driver signals dormant. Volatile. * @IFF_ECHO: echo sent packets. Volatile. */enum net_device_flags {    /* for compatibility with glibc net/if.h */#if __UAPI_DEF_IF_NET_DEVICE_FLAGS    IFF_UP= 1<<0,  /* sysfs */    IFF_BROADCAST= 1<<1,  /* volatile */    IFF_DEBUG= 1<<2,  /* sysfs */    IFF_LOOPBACK= 1<<3,  /* volatile */    IFF_POINTOPOINT= 1<<4,  /* volatile */    IFF_NOTRAILERS= 1<<5,  /* sysfs */    IFF_RUNNING= 1<<6,  /* volatile */    IFF_NOARP= 1<<7,  /* sysfs */    IFF_PROMISC= 1<<8,  /* sysfs */    IFF_ALLMULTI= 1<<9,  /* sysfs */    IFF_MASTER= 1<<10, /* volatile */    IFF_SLAVE= 1<<11, /* volatile */    IFF_MULTICAST= 1<<12, /* sysfs */    IFF_PORTSEL= 1<<13, /* sysfs */    IFF_AUTOMEDIA= 1<<14, /* sysfs */    IFF_DYNAMIC= 1<<15, /* sysfs */#endif /* __UAPI_DEF_IF_NET_DEVICE_FLAGS */#if __UAPI_DEF_IF_NET_DEVICE_FLAGS_LOWER_UP_DORMANT_ECHO    IFF_LOWER_UP= 1<<16, /* volatile */    IFF_DORMANT= 1<<17, /* volatile */    IFF_ECHO= 1<<18, /* volatile */#endif /* __UAPI_DEF_IF_NET_DEVICE_FLAGS_LOWER_UP_DORMANT_ECHO */};#endif /* __UAPI_DEF_IF_NET_DEVICE_FLAGS_LOWER_UP_DORMANT_ECHO != 0 || __UAPI_DEF_IF_NET_DEVICE_FLAGS != 0 *//* for compatibility with glibc net/if.h */#if __UAPI_DEF_IF_NET_DEVICE_FLAGS#define IFF_UPIFF_UP#define IFF_BROADCASTIFF_BROADCAST#define IFF_DEBUGIFF_DEBUG#define IFF_LOOPBACKIFF_LOOPBACK#define IFF_POINTOPOINTIFF_POINTOPOINT#define IFF_NOTRAILERSIFF_NOTRAILERS#define IFF_RUNNINGIFF_RUNNING#define IFF_NOARPIFF_NOARP#define IFF_PROMISCIFF_PROMISC#define IFF_ALLMULTIIFF_ALLMULTI#define IFF_MASTERIFF_MASTER#define IFF_SLAVEIFF_SLAVE#define IFF_MULTICASTIFF_MULTICAST#define IFF_PORTSELIFF_PORTSEL#define IFF_AUTOMEDIAIFF_AUTOMEDIA#define IFF_DYNAMICIFF_DYNAMIC#endif /* __UAPI_DEF_IF_NET_DEVICE_FLAGS */#if __UAPI_DEF_IF_NET_DEVICE_FLAGS_LOWER_UP_DORMANT_ECHO#define IFF_LOWER_UPIFF_LOWER_UP#define IFF_DORMANTIFF_DORMANT#define IFF_ECHOIFF_ECHO#endif /* __UAPI_DEF_IF_NET_DEVICE_FLAGS_LOWER_UP_DORMANT_ECHO */#define IFF_VOLATILE(IFF_LOOPBACK|IFF_POINTOPOINT|IFF_BROADCAST|IFF_ECHO|\                         IFF_MASTER|IFF_SLAVE|IFF_RUNNING|IFF_LOWER_UP|IFF_DORMANT)#define IF_GET_IFACE0x0001/* for querying only */#define IF_GET_PROTO0x0002/* For definitions see hdlc.h */#define IF_IFACE_V350x1000/* V.35 serial interface*/#define IF_IFACE_V240x1001/* V.24 serial interface*/#define IF_IFACE_X210x1002/* X.21 serial interface*/#define IF_IFACE_T10x1003/* T1 telco serial interface*/#define IF_IFACE_E10x1004/* E1 telco serial interface*/#define IF_IFACE_SYNC_SERIAL 0x1005/* can't be set by software*/#define IF_IFACE_X21D   0x1006          /* X.21 Dual Clocking (FarSite) *//* For definitions see hdlc.h */#define IF_PROTO_HDLC0x2000/* raw HDLC protocol*/#define IF_PROTO_PPP0x2001/* PPP protocol*/#define IF_PROTO_CISCO0x2002/* Cisco HDLC protocol*/#define IF_PROTO_FR0x2003/* Frame Relay protocol*/#define IF_PROTO_FR_ADD_PVC 0x2004/*    Create FR PVC*/#define IF_PROTO_FR_DEL_PVC 0x2005/*    Delete FR PVC*/#define IF_PROTO_X250x2006/* X.25*/#define IF_PROTO_HDLC_ETH 0x2007/* raw HDLC, Ethernet emulation*/#define IF_PROTO_FR_ADD_ETH_PVC 0x2008/*  Create FR Ethernet-bridged PVC */#define IF_PROTO_FR_DEL_ETH_PVC 0x2009/*  Delete FR Ethernet-bridged PVC */#define IF_PROTO_FR_PVC0x200A/* for reading PVC status*/#define IF_PROTO_FR_ETH_PVC 0x200B#define IF_PROTO_RAW    0x200C          /* RAW Socket                   *//* RFC 2863 operational status */enum {    IF_OPER_UNKNOWN,    IF_OPER_NOTPRESENT,    IF_OPER_DOWN,    IF_OPER_LOWERLAYERDOWN,    IF_OPER_TESTING,    IF_OPER_DORMANT,    IF_OPER_UP,};/* link modes */enum {    IF_LINK_MODE_DEFAULT,    IF_LINK_MODE_DORMANT,/* limit upward transition to dormant */};/* *Device mapping structure. I'd just gone off and designed a  *beautiful scheme using only loadable modules with arguments *for driver options and along come the PCMCIA people 8) * *Ah well. The get() side of this is good for WDSETUP, and it'll *be handy for debugging things. The set side is fine for now and *being very small might be worth keeping for clean configuration. *//* for compatibility with glibc net/if.h */#if __UAPI_DEF_IF_IFMAPstruct ifmap {    unsigned long mem_start;    unsigned long mem_end;    unsigned short base_addr;     unsigned char irq;    unsigned char dma;    unsigned char port;    /* 3 bytes spare */};#endif /* __UAPI_DEF_IF_IFMAP */struct if_settings {    unsigned int type;/* Type of physical device or protocol */    unsigned int size;/* Size of the data allocated by the caller */    union {        /* {atm/eth/dsl}_settings anyone ? */        raw_hdlc_proto__user *raw_hdlc;        cisco_proto__user *cisco;        fr_proto__user *fr;        fr_proto_pvc__user *fr_pvc;        fr_proto_pvc_info__user *fr_pvc_info;        /* interface settings */        sync_serial_settings__user *sync;        te1_settings__user *te1;    } ifs_ifsu;};/* * Interface request structure used for socket * ioctl's.  All interface ioctl's must have parameter * definitions which begin with ifr_name.  The * remainder may be interface specific. *//* for compatibility with glibc net/if.h */#if __UAPI_DEF_IF_IFREQstruct ifreq {#define IFHWADDRLEN6    union    {        charifrn_name[IFNAMSIZ];/* if name, e.g. "en0" */    } ifr_ifrn;    union {        structsockaddr ifru_addr;        structsockaddr ifru_dstaddr;        structsockaddr ifru_broadaddr;        structsockaddr ifru_netmask;        struct  sockaddr ifru_hwaddr;        shortifru_flags;        intifru_ivalue;        intifru_mtu;        struct  ifmap ifru_map;        charifru_slave[IFNAMSIZ];/* Just fits the size */        charifru_newname[IFNAMSIZ];        void __user *ifru_data;        structif_settings ifru_settings;    } ifr_ifru;};#endif /* __UAPI_DEF_IF_IFREQ */#define ifr_nameifr_ifrn.ifrn_name/* interface name */#define ifr_hwaddrifr_ifru.ifru_hwaddr/* MAC address */#defineifr_addrifr_ifru.ifru_addr/* address*/#defineifr_dstaddrifr_ifru.ifru_dstaddr/* other end of p-p lnk*/#defineifr_broadaddrifr_ifru.ifru_broadaddr/* broadcast address*/#defineifr_netmaskifr_ifru.ifru_netmask/* interface net mask*/#defineifr_flagsifr_ifru.ifru_flags/* flags*/#defineifr_metricifr_ifru.ifru_ivalue/* metric*/#defineifr_mtuifr_ifru.ifru_mtu/* mtu*/#define ifr_mapifr_ifru.ifru_map/* device map*/#define ifr_slaveifr_ifru.ifru_slave/* slave device*/#defineifr_dataifr_ifru.ifru_data/* for use by interface*/#define ifr_ifindexifr_ifru.ifru_ivalue/* interface index*/#define ifr_bandwidthifr_ifru.ifru_ivalue    /* link bandwidth*/#define ifr_qlenifr_ifru.ifru_ivalue/* Queue length */#define ifr_newnameifr_ifru.ifru_newname/* New name*/#define ifr_settingsifr_ifru.ifru_settings/* Device/proto settings*//* * Structure used in SIOCGIFCONF request. * Used to retrieve interface configuration * for machine (useful for programs which * must know all networks accessible). *//* for compatibility with glibc net/if.h */#if __UAPI_DEF_IF_IFCONFstruct ifconf  {    intifc_len;/* size of buffer*/    union {        char __user *ifcu_buf;        struct ifreq __user *ifcu_req;    } ifc_ifcu;};#endif /* __UAPI_DEF_IF_IFCONF */#defineifc_bufifc_ifcu.ifcu_buf/* buffer address*/#defineifc_reqifc_ifcu.ifcu_req/* array of structures*/#endif /* _LINUX_IF_H */