iOS开发之获取网关IP地址,路由器地址,在网上找了段代码,说要自己建立route.h,测试发现目前iOS SDK已经包含了route.h,直接使用啦,直接上代码
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#define CTL_NET 4 /* network, see socket.h */ #define ROUNDUP(a) \ ((a) > 0 ? (1 + (((a) - 1) | (sizeof(long) - 1))) : sizeof(long)) #import "NetInfo.h" #include <arpa/inet.h> #include <sys/sysctl.h> #include <net/route.h> @implementation NetInfo + (NSString *)getGatewayIPAddress { NSString *address = nil; /* net.route.0.inet.flags.gateway */ int mib[] = {CTL_NET, PF_ROUTE, 0, AF_INET, NET_RT_FLAGS, RTF_GATEWAY}; size_t l; char * buf, * p; struct rt_msghdr * rt; struct sockaddr * sa; struct sockaddr * sa_tab[RTAX_MAX]; int i; int r = -1; if(sysctl(mib, sizeof(mib)/sizeof(int), 0, &l, 0, 0) < 0) { address = @"192.168.0.1"; } if(l>0) { buf = malloc(l); if(sysctl(mib, sizeof(mib)/sizeof(int), buf, &l, 0, 0) < 0) { address = @"192.168.0.1"; } for(p=buf; p<buf+l; p+=rt->rtm_msglen) { rt = (struct rt_msghdr *)p; sa = (struct sockaddr *)(rt + 1); for(i=0; i<RTAX_MAX; i++) { if(rt->rtm_addrs & (1 << i)) { sa_tab[i] = sa; sa = (struct sockaddr *)((char *)sa + ROUNDUP(sa->sa_len)); } else { sa_tab[i] = NULL; } } if( ((rt->rtm_addrs & (RTA_DST|RTA_GATEWAY)) == (RTA_DST|RTA_GATEWAY)) && sa_tab[RTAX_DST]->sa_family == AF_INET && sa_tab[RTAX_GATEWAY]->sa_family == AF_INET) { unsigned char octet[4] = {0,0,0,0}; int i; for (i=0; i<4; i++){ octet[i] = ( ((struct sockaddr_in *)(sa_tab[RTAX_GATEWAY]))->sin_addr.s_addr >> (i*8) ) & 0xFF; } if(((struct sockaddr_in *)sa_tab[RTAX_DST])->sin_addr.s_addr == 0) { in_addr_t addr = ((struct sockaddr_in *)(sa_tab[RTAX_GATEWAY]))->sin_addr.s_addr; r = 0; address = [NSString stringWithFormat:@"%s", inet_ntoa(*((struct in_addr*)&addr))]; NSLog(@"\naddress%@",address); break; } } } free(buf); } return address; } @end |
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