我是 iPhone 开发的新手,我想将网络唤醒功能集成到我的应用程序中,而不会在已知 IP 的情况下强迫我的用户输入计算机 MAC 地址。我搜索了大约几个小时,获取了 ARP 工具的源代码,但我不知道如何在 iPhone 上管理它。
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3 回答
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由于没有人回答我的问题......这是答案;)
#include <sys/param.h>
#include <sys/file.h>
#include <sys/socket.h>
#include <sys/sysctl.h>
#include <net/if.h>
#include <net/if_dl.h>
#include "if_types.h"
#include "route.h"
#include "if_ether.h"
#include <netinet/in.h>
#include <arpa/inet.h>
#include <err.h>
#include <errno.h>
#include <netdb.h>
#include <paths.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
-(NSString*) ip2mac: (char*) ip
{
int expire_time, flags, export_only, doing_proxy, found_entry;
NSString *mAddr = nil;
u_long addr = inet_addr(ip);
int mib[6];
size_t needed;
char *host, *lim, *buf, *next;
struct rt_msghdr *rtm;
struct sockaddr_inarp *sin;
struct sockaddr_dl *sdl;
extern int h_errno;
struct hostent *hp;
mib[0] = CTL_NET;
mib[1] = PF_ROUTE;
mib[2] = 0;
mib[3] = AF_INET;
mib[4] = NET_RT_FLAGS;
mib[5] = RTF_LLINFO;
if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0)
err(1, "route-sysctl-estimate");
if ((buf = malloc(needed)) == NULL)
err(1, "malloc");
if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0)
err(1, "actual retrieval of routing table");
lim = buf + needed;
for (next = buf; next < lim; next += rtm->rtm_msglen) {
rtm = (struct rt_msghdr *)next;
sin = (struct sockaddr_inarp *)(rtm + 1);
sdl = (struct sockaddr_dl *)(sin + 1);
if (addr) {
if (addr != sin->sin_addr.s_addr)
continue;
found_entry = 1;
}
if (nflag == 0)
hp = gethostbyaddr((caddr_t)&(sin->sin_addr),
sizeof sin->sin_addr, AF_INET);
else
hp = 0;
if (hp)
host = hp->h_name;
else {
host = "?";
if (h_errno == TRY_AGAIN)
nflag = 1;
}
if (sdl->sdl_alen) {
u_char *cp = LLADDR(sdl);
mAddr = [NSString stringWithFormat:@"%x:%x:%x:%x:%x:%x", cp[0], cp[1], cp[2], cp[3], cp[4], cp[5]];
// ether_print((u_char *)LLADDR(sdl));
}
else
mAddr = nil;
}
if (found_entry == 0) {
return nil;
} else {
return mAddr;
}
}
来自苹果 arp.c 在 iphone 上工作
复制以下内容:
- "if_types.h"
- "route.h"
- "if_ether.h"
mac 中的头文件包含在您的项目文件夹中并添加到类中
于 2010-02-16T00:26:24.373 回答
8
我简化了代码并修复了内存泄漏。
在我的机器上,头文件位于 /usr/include/netinet 和 /usr/include/net 中。
- (NSString*)ip2mac:(in_addr_t)addr
{
NSString *ret = nil;
size_t needed;
char *buf, *next;
struct rt_msghdr *rtm;
struct sockaddr_inarp *sin;
struct sockaddr_dl *sdl;
int mib[6];
mib[0] = CTL_NET;
mib[1] = PF_ROUTE;
mib[2] = 0;
mib[3] = AF_INET;
mib[4] = NET_RT_FLAGS;
mib[5] = RTF_LLINFO;
if (sysctl(mib, sizeof(mib) / sizeof(mib[0]), NULL, &needed, NULL, 0) < 0)
err(1, "route-sysctl-estimate");
if ((buf = (char*)malloc(needed)) == NULL)
err(1, "malloc");
if (sysctl(mib, sizeof(mib) / sizeof(mib[0]), buf, &needed, NULL, 0) < 0)
err(1, "retrieval of routing table");
for (next = buf; next < buf + needed; next += rtm->rtm_msglen) {
rtm = (struct rt_msghdr *)next;
sin = (struct sockaddr_inarp *)(rtm + 1);
sdl = (struct sockaddr_dl *)(sin + 1);
if (addr != sin->sin_addr.s_addr || sdl->sdl_alen < 6)
continue;
u_char *cp = (u_char*)LLADDR(sdl);
ret = [NSString stringWithFormat:@"%02X:%02X:%02X:%02X:%02X:%02X",
cp[0], cp[1], cp[2], cp[3], cp[4], cp[5]];
break;
}
free(buf);
return ret;
}
于 2011-05-17T17:40:05.293 回答
2
我不确定 sysctl 函数是公共 API 的一部分。我已经使用了明显的方法,并且我的应用因“非公开”API 使用而被拒绝。但是,除了上面显示的方法之外,我也不相信有任何方法可以做到这一点。
于 2011-06-15T16:14:43.397 回答