C 列出以太网usb适配器接口
我需要一个C函数，列出以太网usb适配器接口。在互联网上进行了一些搜索之后，我在ubuntu 16.04中创建了以下小代码：C 列出以太网usb适配器接口,c,linux,networking,usb,ethernet,C,Linux,Networking,Usb,Ethernet,我需要一个C函数，列出以太网usb适配器接口。在互联网上进行了一些搜索之后，我在ubuntu 16.04中创建了以下小代码： #include <stdio.h> #include <stdlib.h> /* The following include files for the network interface. */ #include <sys/types.h> #include <sys/socket.h> #include <ifa
#include <stdio.h>
#include <stdlib.h>
/* The following include files for the network interface. */
#include <sys/types.h>
#include <sys/socket.h>
#include <ifaddrs.h>
#include <net/if.h>
#include <net/if_dl.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <net/if_types.h>
/* For "toupper". */
#include <ctype.h>
/* For "strerror". */
#include <string.h>
/* For "errno". */
#include <errno.h>
int main() {
struct ifaddrs *addrs,*tmp;
getifaddrs(&addrs);
tmp = addrs;
struct sockaddr_dl * sdl;
while (tmp)
{
if (tmp->ifa_addr && tmp->ifa_addr->sa_family == AF_PACKET)
printf("%s\n", tmp->ifa_name);
tmp = tmp->ifa_next;
sdl = (struct sockaddr_dl *) tmp->ifa_addr;
if (sdl->sdl_type == IFT_USB) { //IFT_USB
printf("%s is usb adapter\n", tmp->ifa_name);
}
}
freeifaddrs(addrs);
}
/#includefatal error: net/if_types.h: No such file or directory
/#includeethernetifaces.c: In function ‘main’:
ethernetifaces.c:48:13: error: dereferencing pointer to incomplete type ‘struct sockaddr_dl’
if (sdl->sdl_type == IFT_USB) { //IFT_USB
^
ethernetifaces.c:48:27: error: ‘IFT_USB’ undeclared (first use in this function)
if (sdl->sdl_type == IFT_USB) { //IFT_USB
^
ethernetifaces.c:48:27: note: each undeclared identifier is reported only once for each function it appears in
内核版本：4.15.0-54-generic我在安装
freebsd gluesudo-apt-get-install-freebsd glue- 第一个是创建文件，如果从internet搜索并将其插入目录
/usr/include/freebsd/net. - 第二个是将行
注释到文件#include_next
（if_dl.h
）/usr/include/freebsd/net/if_dl.h - 第三种方法是在代码中插入结构声明
sockaddr\u dl
#include <stdio.h>
#include <stdlib.h>
/*The following include files for the network interface. */
#include <sys/types.h>
#include <sys/socket.h>
#include <ifaddrs.h>
#include <net/if.h>
#include <freebsd/net/if_dl.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <freebsd/net/if_types.h>
/* For "toupper". */
#include <ctype.h>
/* For "strerror". */
#include <string.h>
/* For "errno". */
#include <errno.h>
/*
* Structure of a Link-Level sockaddr:
*/
struct sockaddr_dl {
unsigned char sdl_len; /* Total length of sockaddr */
unsigned char sdl_family; /* AF_LINK */
unsigned short sdl_index; /* if != 0, system given index for interface */
unsigned char sdl_type; /* interface type */
unsigned char sdl_nlen; /* interface name length, no trailing 0 reqd. */
unsigned char sdl_alen; /* link level address length */
unsigned char sdl_slen; /* link layer selector length */
char sdl_data[46]; /* minimum work area, can be larger;
contains both if name and ll address */
};
int main() {
struct ifaddrs *addrs,*tmp;
getifaddrs(&addrs);
tmp = addrs;
struct sockaddr_dl * sdl;
while (tmp)
{
if (tmp->ifa_addr && tmp->ifa_addr->sa_family == AF_PACKET) {
sdl = (struct sockaddr_dl *) tmp->ifa_addr;
printf("%s %d - ", tmp->ifa_name, sdl->sdl_type);
if (sdl->sdl_type == IFT_USB) { //IFT_USB
printf("%s is usb adapter", tmp->ifa_name);
}
puts("");
}
tmp = tmp->ifa_next;
}
freeifaddrs(addrs);
}
#包括
#包括
/*以下包括网络接口的文件*/
#包括
#包括
#包括
#包括
#包括
#包括
#包括
#包括
/*为了“图珀”*/
#包括
/*对于“strerror”*/
#包括
/*对于“errno”*/
#包括
/*
*链路级sockaddr的结构：
*/
结构sockaddr\u dl{
无符号字符sdl_len；/*sockaddr的总长度*/
无符号字符sdl_族；/*AF_链接*/
无符号短sdl_索引；/*如果！=0，系统为接口指定索引*/
无符号字符sdl_类型；/*接口类型*/
无符号字符sdl_nlen；/*接口名称长度，不需要尾随0*/
无符号字符sdl_alen；/*链路级地址长度*/
无符号字符sdl_slen；/*链路层选择器长度*/
字符sdl_数据[46]；/*最小工作区域，可以更大；
包含if名称和ll地址*/
};
int main（）{
结构ifaddrs*addrs，*tmp；
getifaddrs（和addrs）；
tmp=地址；
结构sockaddr_dl*sdl；
while（tmp）
{
如果（tmp->ifa\U地址（&tmp->ifa\U地址->sa\U系列==AF\U数据包）{
sdl=（结构sockaddr\u dl*）tmp->ifa\u addr；
printf（“%s%d-”，tmp->ifa\u名称，sdl->sdl\u类型）；
如果（sdl->sdl_类型==IFT_USB）{//IFT_USB
printf（“%s是usb适配器”，tmp->ifa\u名称）；
}
认沽权（“”）；
}
tmp=tmp->ifa\U下一步；
}
freeifaddrs（addrs）；
}
/*
* Copyright (c) 2000-2012 Apple Inc. All rights reserved.
*
* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
*
* This file contains Original Code and/or Modifications of Original Code
* as defined in and that are subject to the Apple Public Source License
* Version 2.0 (the 'License'). You may not use this file except in
* compliance with the License. The rights granted to you under the License
* may not be used to create, or enable the creation or redistribution of,
* unlawful or unlicensed copies of an Apple operating system, or to
* circumvent, violate, or enable the circumvention or violation of, any
* terms of an Apple operating system software license agreement.
*
* Please obtain a copy of the License at
* http://www.opensource.apple.com/apsl/ and read it before using this file.
*
* The Original Code and all software distributed under the License are
* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
* Please see the License for the specific language governing rights and
* limitations under the License.
*
* @APPLE_OSREFERENCE_LICENSE_HEADER_END@
*/
/*
* Copyright (c) 1989, 1993, 1994
* The Regents of the University of California. All rights reserved.
*
* 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. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University 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 REGENTS 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 REGENTS 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.
*
* @(#)if_types.h 8.2 (Berkeley) 4/20/94
* $FreeBSD: src/sys/net/if_types.h,v 1.8.2.3 2001/07/03 11:01:41 ume Exp $
*/
#ifndef _NET_IF_TYPES_H_
#define _NET_IF_TYPES_H_
// #include <sys/appleapiopts.h>
/*
* Interface types for benefit of parsing media address headers.
* This list is derived from the SNMP list of ifTypes, currently
* documented in RFC1573.
* The current list of assignments is maintained at:
* http://www.iana.org/assignments/smi-numbers
*/
#define IFT_OTHER 0x1 /* none of the following */
#define IFT_1822 0x2 /* old-style arpanet imp */
#define IFT_HDH1822 0x3 /* HDH arpanet imp */
#define IFT_X25DDN 0x4 /* x25 to imp */
#define IFT_X25 0x5 /* PDN X25 interface (RFC877) */
#define IFT_ETHER 0x6 /* Ethernet CSMACD */
#define IFT_ISO88023 0x7 /* CMSA CD */
#define IFT_ISO88024 0x8 /* Token Bus */
#define IFT_ISO88025 0x9 /* Token Ring */
#define IFT_ISO88026 0xa /* MAN */
#define IFT_STARLAN 0xb
#define IFT_P10 0xc /* Proteon 10MBit ring */
#define IFT_P80 0xd /* Proteon 80MBit ring */
#define IFT_HY 0xe /* Hyperchannel */
#define IFT_FDDI 0xf
#define IFT_LAPB 0x10
#define IFT_SDLC 0x11
#define IFT_T1 0x12
#define IFT_CEPT 0x13 /* E1 - european T1 */
#define IFT_ISDNBASIC 0x14
#define IFT_ISDNPRIMARY 0x15
#define IFT_PTPSERIAL 0x16 /* Proprietary PTP serial */
#define IFT_PPP 0x17 /* RFC 1331 */
#define IFT_LOOP 0x18 /* loopback */
#define IFT_EON 0x19 /* ISO over IP */
#define IFT_XETHER 0x1a /* obsolete 3MB experimental ethernet */
#define IFT_NSIP 0x1b /* XNS over IP */
#define IFT_SLIP 0x1c /* IP over generic TTY */
#define IFT_ULTRA 0x1d /* Ultra Technologies */
#define IFT_DS3 0x1e /* Generic T3 */
#define IFT_SIP 0x1f /* SMDS */
#define IFT_FRELAY 0x20 /* Frame Relay DTE only */
#define IFT_RS232 0x21
#define IFT_PARA 0x22 /* parallel-port */
#define IFT_ARCNET 0x23
#define IFT_ARCNETPLUS 0x24
#define IFT_ATM 0x25 /* ATM cells */
#define IFT_MIOX25 0x26
#define IFT_SONET 0x27 /* SONET or SDH */
#define IFT_X25PLE 0x28
#define IFT_ISO88022LLC 0x29
#define IFT_LOCALTALK 0x2a
#define IFT_SMDSDXI 0x2b
#define IFT_FRELAYDCE 0x2c /* Frame Relay DCE */
#define IFT_V35 0x2d
#define IFT_HSSI 0x2e
#define IFT_HIPPI 0x2f
#define IFT_MODEM 0x30 /* Generic Modem */
#define IFT_AAL5 0x31 /* AAL5 over ATM */
#define IFT_SONETPATH 0x32
#define IFT_SONETVT 0x33
#define IFT_SMDSICIP 0x34 /* SMDS InterCarrier Interface */
#define IFT_PROPVIRTUAL 0x35 /* Proprietary Virtual/internal */
#define IFT_PROPMUX 0x36 /* Proprietary Multiplexing */
/*
* IFT_GIF, IFT_FAITH and IFT_FAITH are not based on IANA assignments.
* Note: IFT_STF has a defined ifType: 0xd7 (215), but we use 0x39.
*/
#define IFT_GIF 0x37 /*0xf0*/
#define IFT_FAITH 0x38 /*0xf2*/
#define IFT_STF 0x39 /*0xf3*/
#define IFT_L2VLAN 0x87 /* Layer 2 Virtual LAN using 802.1Q */
#define IFT_IEEE8023ADLAG 0x88 /* IEEE802.3ad Link Aggregate */
#define IFT_IEEE1394 0x90 /* IEEE1394 High Performance SerialBus*/
#define IFT_USB 0xa0 /* USB net*/
#define IFT_BRIDGE 0xd1 /* Transparent bridge interface */
#define IFT_ENC 0xf4 /* Encapsulation */
#define IFT_PFLOG 0xf5 /* Packet filter logging */
#define IFT_PFSYNC 0xf6 /* Packet filter state syncing */
#define IFT_CARP 0xf8 /* Common Address Redundancy Protocol */
#define IFT_PKTAP 0xfe /* Packet tap pseudo interface */
#define IFT_CELLULAR 0xff /* Packet Data over Cellular */
#define IFT_PDP IFT_CELLULAR /* deprecated; use IFT_CELLULAR */
#endif
/*
*版权所有（c）2000-2012苹果公司。保留所有权利。
*
*@APPLE\u OSREFERENCE\u LICENSE\u HEADER\u START@
*
*此文件包含原始代码和/或原始代码的修改
*如和中所定义，受苹果公共资源许可证的约束
*2.0版（“许可证”）。除非在中，否则不能使用此文件
*遵守许可证。许可证授予您的权利
*不得用于创建或启用创建或重新分发，
*非法或未经许可的苹果操作系统副本，或
*规避、违反或促成规避或违反任何
*苹果操作系统软件许可协议的条款。
*
*请通过以下地址获取许可证副本：
* http://www.opensource.apple.com/apsl/ 并在使用此文件之前读取它。
*
*原始代码和许可证下分发的所有软件
*按“原样”分发，也不提供任何形式的担保
*明示或默示，苹果特此否认所有此类保证，
*包括但不限于任何适销性保证，
*适合特定用途、安静享受或不侵权。
*请参阅许可证，了解特定语言的管辖权和权限
*许可证下的限制。
*
*@APPLE\u OSREFERENCE\u LICENSE\u HEADER\u END@
*/
/*
*版权所有（c）1989、1993、1994
＊加利福尼亚大学的摄政王。版权所有。
*
*以源代码和二进制形式重新分发和使用，带或不带
*如果满足以下条件，则允许进行修改
*满足以下条件：
* 1. 源代码的重新分发必须保留上述版权
*请注意，此条件列表和以下免责声明。
* 2. 以二进制形式重新分发必须复制上述版权
*请注意，此条件列表和中的以下免责声明
*随分发提供的文件和/或其他材料。
* 3. 所有提及本软件功能或使用的广告材料
*必须显示以下确认信息：
*该产品包括大学开发的软件。
*加利福尼亚、伯克利及其贡献者。
* 4. 既不是大学的名称，也不是贡献者的名称
*可用于认可或推广源自本软件的产品
*未经事先书面许可。
*
*此软件由摄政者和贡献者“按原样”和
*任何明示或暗示的保证，包括但不限于
*对适销性和特定用途适用性的默示保证
*拒绝承认。在任何情况下，摄政者或贡献者概不负责
*对于任何直接、间接、附带、特殊、示范或后果
*损害赔偿（包括但不限于采购替代货物
*或服务；使用、数据或利润损失；或业务中断）
*然而，无论是在合同中，还是在任何责任理论上，都是严格的
*责任或侵权（包括疏忽或其他）
/*
* Copyright (c) 2000-2012 Apple Inc. All rights reserved.
*
* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
*
* This file contains Original Code and/or Modifications of Original Code
* as defined in and that are subject to the Apple Public Source License
* Version 2.0 (the 'License'). You may not use this file except in
* compliance with the License. The rights granted to you under the License
* may not be used to create, or enable the creation or redistribution of,
* unlawful or unlicensed copies of an Apple operating system, or to
* circumvent, violate, or enable the circumvention or violation of, any
* terms of an Apple operating system software license agreement.
*
* Please obtain a copy of the License at
* http://www.opensource.apple.com/apsl/ and read it before using this file.
*
* The Original Code and all software distributed under the License are
* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
* Please see the License for the specific language governing rights and
* limitations under the License.
*
* @APPLE_OSREFERENCE_LICENSE_HEADER_END@
*/
/*
* Copyright (c) 1989, 1993, 1994
* The Regents of the University of California. All rights reserved.
*
* 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. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University 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 REGENTS 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 REGENTS 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.
*
* @(#)if_types.h 8.2 (Berkeley) 4/20/94
* $FreeBSD: src/sys/net/if_types.h,v 1.8.2.3 2001/07/03 11:01:41 ume Exp $
*/
#ifndef _NET_IF_TYPES_H_
#define _NET_IF_TYPES_H_
// #include <sys/appleapiopts.h>
/*
* Interface types for benefit of parsing media address headers.
* This list is derived from the SNMP list of ifTypes, currently
* documented in RFC1573.
* The current list of assignments is maintained at:
* http://www.iana.org/assignments/smi-numbers
*/
#define IFT_OTHER 0x1 /* none of the following */
#define IFT_1822 0x2 /* old-style arpanet imp */
#define IFT_HDH1822 0x3 /* HDH arpanet imp */
#define IFT_X25DDN 0x4 /* x25 to imp */
#define IFT_X25 0x5 /* PDN X25 interface (RFC877) */
#define IFT_ETHER 0x6 /* Ethernet CSMACD */
#define IFT_ISO88023 0x7 /* CMSA CD */
#define IFT_ISO88024 0x8 /* Token Bus */
#define IFT_ISO88025 0x9 /* Token Ring */
#define IFT_ISO88026 0xa /* MAN */
#define IFT_STARLAN 0xb
#define IFT_P10 0xc /* Proteon 10MBit ring */
#define IFT_P80 0xd /* Proteon 80MBit ring */
#define IFT_HY 0xe /* Hyperchannel */
#define IFT_FDDI 0xf
#define IFT_LAPB 0x10
#define IFT_SDLC 0x11
#define IFT_T1 0x12
#define IFT_CEPT 0x13 /* E1 - european T1 */
#define IFT_ISDNBASIC 0x14
#define IFT_ISDNPRIMARY 0x15
#define IFT_PTPSERIAL 0x16 /* Proprietary PTP serial */
#define IFT_PPP 0x17 /* RFC 1331 */
#define IFT_LOOP 0x18 /* loopback */
#define IFT_EON 0x19 /* ISO over IP */
#define IFT_XETHER 0x1a /* obsolete 3MB experimental ethernet */
#define IFT_NSIP 0x1b /* XNS over IP */
#define IFT_SLIP 0x1c /* IP over generic TTY */
#define IFT_ULTRA 0x1d /* Ultra Technologies */
#define IFT_DS3 0x1e /* Generic T3 */
#define IFT_SIP 0x1f /* SMDS */
#define IFT_FRELAY 0x20 /* Frame Relay DTE only */
#define IFT_RS232 0x21
#define IFT_PARA 0x22 /* parallel-port */
#define IFT_ARCNET 0x23
#define IFT_ARCNETPLUS 0x24
#define IFT_ATM 0x25 /* ATM cells */
#define IFT_MIOX25 0x26
#define IFT_SONET 0x27 /* SONET or SDH */
#define IFT_X25PLE 0x28
#define IFT_ISO88022LLC 0x29
#define IFT_LOCALTALK 0x2a
#define IFT_SMDSDXI 0x2b
#define IFT_FRELAYDCE 0x2c /* Frame Relay DCE */
#define IFT_V35 0x2d
#define IFT_HSSI 0x2e
#define IFT_HIPPI 0x2f
#define IFT_MODEM 0x30 /* Generic Modem */
#define IFT_AAL5 0x31 /* AAL5 over ATM */
#define IFT_SONETPATH 0x32
#define IFT_SONETVT 0x33
#define IFT_SMDSICIP 0x34 /* SMDS InterCarrier Interface */
#define IFT_PROPVIRTUAL 0x35 /* Proprietary Virtual/internal */
#define IFT_PROPMUX 0x36 /* Proprietary Multiplexing */
/*
* IFT_GIF, IFT_FAITH and IFT_FAITH are not based on IANA assignments.
* Note: IFT_STF has a defined ifType: 0xd7 (215), but we use 0x39.
*/
#define IFT_GIF 0x37 /*0xf0*/
#define IFT_FAITH 0x38 /*0xf2*/
#define IFT_STF 0x39 /*0xf3*/
#define IFT_L2VLAN 0x87 /* Layer 2 Virtual LAN using 802.1Q */
#define IFT_IEEE8023ADLAG 0x88 /* IEEE802.3ad Link Aggregate */
#define IFT_IEEE1394 0x90 /* IEEE1394 High Performance SerialBus*/
#define IFT_USB 0xa0 /* USB net*/
#define IFT_BRIDGE 0xd1 /* Transparent bridge interface */
#define IFT_ENC 0xf4 /* Encapsulation */
#define IFT_PFLOG 0xf5 /* Packet filter logging */
#define IFT_PFSYNC 0xf6 /* Packet filter state syncing */
#define IFT_CARP 0xf8 /* Common Address Redundancy Protocol */
#define IFT_PKTAP 0xfe /* Packet tap pseudo interface */
#define IFT_CELLULAR 0xff /* Packet Data over Cellular */
#define IFT_PDP IFT_CELLULAR /* deprecated; use IFT_CELLULAR */
#endif
//#include_next <net/if_dl.h>
#ifndef _FREEBSD_NET_IF_DL_H_
#define _FREEBSD_NET_IF_DL_H_
__BEGIN_DECLS
void link_addr(const char *, struct sockaddr_dl *);
char *link_ntoa(const struct sockaddr_dl *);
__END_DECLS
#endif