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Trivial changes: whitespace and modes. Remote whitespace at the ends of lines. Remove blank lines from the ends of files. Change modes on source files so that they are not executable. Signed-off-by: Dan Cross <cross@gajendra.net>
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  1 9aec88f2 2005-12-31 devnull #include <u.h>

  2 9aec88f2 2005-12-31 devnull #include <sys/ioctl.h>

  3 9aec88f2 2005-12-31 devnull #include <sys/socket.h>

  4 9aec88f2 2005-12-31 devnull #include <netinet/in.h>

  5 9aec88f2 2005-12-31 devnull #include <arpa/inet.h>

  6 9aec88f2 2005-12-31 devnull #include <asm/types.h>

  7 9aec88f2 2005-12-31 devnull #include <net/if_arp.h>

  8 9aec88f2 2005-12-31 devnull #include <linux/netlink.h>

  9 9aec88f2 2005-12-31 devnull #include <linux/rtnetlink.h>

 10 9aec88f2 2005-12-31 devnull #include <net/if.h>

 11 9aec88f2 2005-12-31 devnull #include <libc.h>

 12 9aec88f2 2005-12-31 devnull #include <ip.h>

 13 9aec88f2 2005-12-31 devnull 

 14 9aec88f2 2005-12-31 devnull /*

 15 9aec88f2 2005-12-31 devnull  * Use netlink sockets to find interfaces.

 16 9aec88f2 2005-12-31 devnull  * Thanks to Erik Quanstrom.

 17 9aec88f2 2005-12-31 devnull  */

 18 9aec88f2 2005-12-31 devnull static int

 19 fa325e9b 2020-01-10 cross netlinkrequest(int fd, int type, int (*fn)(struct nlmsghdr *h, Ipifc**, int),

 20 9aec88f2 2005-12-31 devnull 	Ipifc **ifc, int index)

 21 9aec88f2 2005-12-31 devnull {

 22 9aec88f2 2005-12-31 devnull 	char buf[1024];

 23 9aec88f2 2005-12-31 devnull 	int n;

 24 9aec88f2 2005-12-31 devnull 	struct sockaddr_nl nl;

 25 9aec88f2 2005-12-31 devnull 	struct {

 26 9aec88f2 2005-12-31 devnull 		struct nlmsghdr nlh;

 27 9aec88f2 2005-12-31 devnull 		struct rtgenmsg g;

 28 9aec88f2 2005-12-31 devnull 	} req;

 29 9aec88f2 2005-12-31 devnull 	struct nlmsghdr *h;

 30 9aec88f2 2005-12-31 devnull 

 31 9aec88f2 2005-12-31 devnull 	memset(&nl, 0, sizeof nl);

 32 9aec88f2 2005-12-31 devnull 	nl.nl_family = AF_NETLINK;

 33 9aec88f2 2005-12-31 devnull 

 34 9aec88f2 2005-12-31 devnull 	memset(&req, 0, sizeof req);

 35 9aec88f2 2005-12-31 devnull 	req.nlh.nlmsg_len = sizeof req;

 36 9aec88f2 2005-12-31 devnull 	req.nlh.nlmsg_type = type;

 37 9aec88f2 2005-12-31 devnull 	req.nlh.nlmsg_flags = NLM_F_ROOT|NLM_F_MATCH|NLM_F_REQUEST;

 38 9aec88f2 2005-12-31 devnull 	req.nlh.nlmsg_pid = 0;

 39 9aec88f2 2005-12-31 devnull 	req.nlh.nlmsg_seq = 1;

 40 9aec88f2 2005-12-31 devnull 	req.g.rtgen_family = AF_NETLINK;

 41 9aec88f2 2005-12-31 devnull 

 42 9aec88f2 2005-12-31 devnull 	if(sendto(fd, (void*)&req, sizeof req, 0, (struct sockaddr*)&nl, sizeof nl) < 0)

 43 9aec88f2 2005-12-31 devnull 		return -1;

 44 9aec88f2 2005-12-31 devnull 

 45 9aec88f2 2005-12-31 devnull 	while((n=read(fd, buf, sizeof buf)) > 0){

 46 9aec88f2 2005-12-31 devnull 		for(h=(struct nlmsghdr*)buf; NLMSG_OK(h, n); h = NLMSG_NEXT(h, n)){

 47 9aec88f2 2005-12-31 devnull 			if(h->nlmsg_type == NLMSG_DONE)

 48 9aec88f2 2005-12-31 devnull 				return 0;

 49 9aec88f2 2005-12-31 devnull 			if(h->nlmsg_type == NLMSG_ERROR){

 50 9aec88f2 2005-12-31 devnull 				werrstr("netlink error");

 51 9aec88f2 2005-12-31 devnull 				return -1;

 52 9aec88f2 2005-12-31 devnull 			}

 53 9aec88f2 2005-12-31 devnull 			if(fn(h, ifc, index) < 0)

 54 9aec88f2 2005-12-31 devnull 				return -1;

 55 9aec88f2 2005-12-31 devnull 		}

 56 9aec88f2 2005-12-31 devnull 	}

 57 9aec88f2 2005-12-31 devnull 	werrstr("netlink error");

 58 9aec88f2 2005-12-31 devnull 	return -1;

 59 9aec88f2 2005-12-31 devnull }

 60 9aec88f2 2005-12-31 devnull 

 61 9aec88f2 2005-12-31 devnull static int

 62 9aec88f2 2005-12-31 devnull devsocket(void)

 63 9aec88f2 2005-12-31 devnull {

 64 9aec88f2 2005-12-31 devnull 	/* we couldn't care less which one; just want to talk to the kernel! */

 65 9aec88f2 2005-12-31 devnull 	static int dumb[3] = { AF_INET, AF_PACKET, AF_INET6 };

 66 9aec88f2 2005-12-31 devnull 	int i, fd;

 67 fa325e9b 2020-01-10 cross 

 68 9aec88f2 2005-12-31 devnull 	for(i=0; i<nelem(dumb); i++)

 69 9aec88f2 2005-12-31 devnull 		if((fd = socket(dumb[i], SOCK_DGRAM, 0)) >= 0)

 70 9aec88f2 2005-12-31 devnull 			return fd;

 71 9aec88f2 2005-12-31 devnull 	return -1;

 72 9aec88f2 2005-12-31 devnull }

 73 9aec88f2 2005-12-31 devnull 

 74 9aec88f2 2005-12-31 devnull static int

 75 9aec88f2 2005-12-31 devnull parsertattr(struct rtattr **dst, int ndst, struct nlmsghdr *h, int type, int skip)

 76 9aec88f2 2005-12-31 devnull {

 77 9aec88f2 2005-12-31 devnull 	struct rtattr *src;

 78 9aec88f2 2005-12-31 devnull 	int len;

 79 fa325e9b 2020-01-10 cross 

 80 9aec88f2 2005-12-31 devnull 	len = h->nlmsg_len - NLMSG_LENGTH(skip);

 81 9aec88f2 2005-12-31 devnull 	if(len < 0 || h->nlmsg_type != type){

 82 9aec88f2 2005-12-31 devnull 		werrstr("attrs too short");

 83 9aec88f2 2005-12-31 devnull 		return -1;

 84 9aec88f2 2005-12-31 devnull 	}

 85 9aec88f2 2005-12-31 devnull 	src = (struct rtattr*)((char*)NLMSG_DATA(h) + NLMSG_ALIGN(skip));

 86 9aec88f2 2005-12-31 devnull 

 87 9aec88f2 2005-12-31 devnull 	memset(dst, 0, ndst*sizeof dst[0]);

 88 9aec88f2 2005-12-31 devnull 	for(; RTA_OK(src, len); src = RTA_NEXT(src, len))

 89 9aec88f2 2005-12-31 devnull 		if(src->rta_type < ndst)

 90 9aec88f2 2005-12-31 devnull 			dst[src->rta_type] = src;

 91 9aec88f2 2005-12-31 devnull 	return 0;

 92 9aec88f2 2005-12-31 devnull }

 93 9aec88f2 2005-12-31 devnull 

 94 9aec88f2 2005-12-31 devnull static void

 95 9aec88f2 2005-12-31 devnull rta2ip(int af, uchar *ip, struct rtattr *rta)

 96 9aec88f2 2005-12-31 devnull {

 97 9aec88f2 2005-12-31 devnull 	memset(ip, 0, IPaddrlen);

 98 fa325e9b 2020-01-10 cross 

 99 9aec88f2 2005-12-31 devnull 	switch(af){

100 9aec88f2 2005-12-31 devnull 	case AF_INET:

101 9aec88f2 2005-12-31 devnull 		memmove(ip, v4prefix, IPv4off);

102 9aec88f2 2005-12-31 devnull 		memmove(ip+IPv4off, RTA_DATA(rta), IPv4addrlen);

103 9aec88f2 2005-12-31 devnull 		break;

104 9aec88f2 2005-12-31 devnull 	case AF_INET6:

105 9aec88f2 2005-12-31 devnull 		memmove(ip, RTA_DATA(rta), IPaddrlen);

106 9aec88f2 2005-12-31 devnull 		break;

107 9aec88f2 2005-12-31 devnull 	}

108 9aec88f2 2005-12-31 devnull }

109 9aec88f2 2005-12-31 devnull 

110 9aec88f2 2005-12-31 devnull static int

111 9aec88f2 2005-12-31 devnull getlink(struct nlmsghdr *h, Ipifc **ipifclist, int index)

112 9aec88f2 2005-12-31 devnull {

113 9aec88f2 2005-12-31 devnull 	char *p;

114 9aec88f2 2005-12-31 devnull 	int fd;

115 9aec88f2 2005-12-31 devnull 	struct rtattr *attr[IFLA_MAX+1];

116 9aec88f2 2005-12-31 devnull 	struct ifinfomsg *ifi;

117 9aec88f2 2005-12-31 devnull 	Ipifc *ifc;

118 fa325e9b 2020-01-10 cross 

119 9aec88f2 2005-12-31 devnull 	ifi = (struct ifinfomsg*)NLMSG_DATA(h);

120 9aec88f2 2005-12-31 devnull 	if(index >= 0 && ifi->ifi_index != index)

121 9aec88f2 2005-12-31 devnull 		return 0;

122 9aec88f2 2005-12-31 devnull 

123 9aec88f2 2005-12-31 devnull 	ifc = mallocz(sizeof *ifc, 1);

124 9aec88f2 2005-12-31 devnull 	if(ifc == nil)

125 9aec88f2 2005-12-31 devnull 		return -1;

126 9aec88f2 2005-12-31 devnull 	ifc->index = ifi->ifi_index;

127 9aec88f2 2005-12-31 devnull 

128 9aec88f2 2005-12-31 devnull 	while(*ipifclist)

129 9aec88f2 2005-12-31 devnull 		ipifclist = &(*ipifclist)->next;

130 9aec88f2 2005-12-31 devnull 	*ipifclist = ifc;

131 9aec88f2 2005-12-31 devnull 

132 9aec88f2 2005-12-31 devnull 	if(parsertattr(attr, nelem(attr), h, RTM_NEWLINK, sizeof(struct ifinfomsg)) < 0)

133 9aec88f2 2005-12-31 devnull 		return -1;

134 9aec88f2 2005-12-31 devnull 

135 9aec88f2 2005-12-31 devnull 	if(attr[IFLA_IFNAME])

136 9aec88f2 2005-12-31 devnull 		p = (char*)RTA_DATA(attr[IFLA_IFNAME]);

137 9aec88f2 2005-12-31 devnull 	else

138 9aec88f2 2005-12-31 devnull 		p = "nil";

139 9aec88f2 2005-12-31 devnull 	strecpy(ifc->dev, ifc->dev+sizeof ifc->dev, p);

140 9aec88f2 2005-12-31 devnull 

141 9aec88f2 2005-12-31 devnull 	if(attr[IFLA_MTU])

142 9aec88f2 2005-12-31 devnull 		ifc->mtu = *(int*)RTA_DATA(attr[IFLA_MTU]);

143 d9742d7e 2006-01-05 devnull 

144 d9742d7e 2006-01-05 devnull 	/*

145 d9742d7e 2006-01-05 devnull 	 * Does not work on old Linux systems,

146 d9742d7e 2006-01-05 devnull 	 * and not really necessary for my purposes.

147 d9742d7e 2006-01-05 devnull 	 * Uncomment if you want it bad.

148 d9742d7e 2006-01-05 devnull 	 *

149 9aec88f2 2005-12-31 devnull 	if(attr[IFLA_STATS]){

150 9aec88f2 2005-12-31 devnull 		struct rtnl_link_stats *s;

151 9aec88f2 2005-12-31 devnull 

152 9aec88f2 2005-12-31 devnull 		s = RTA_DATA(attr[IFLA_STATS]);

153 9aec88f2 2005-12-31 devnull 		ifc->pktin = s->rx_packets;

154 9aec88f2 2005-12-31 devnull 		ifc->pktout = s->tx_packets;

155 9aec88f2 2005-12-31 devnull 		ifc->errin = s->rx_errors;

156 9aec88f2 2005-12-31 devnull 		ifc->errout = s->tx_errors;

157 9aec88f2 2005-12-31 devnull 	}

158 d9742d7e 2006-01-05 devnull 	 *

159 d9742d7e 2006-01-05 devnull 	 */

160 d9742d7e 2006-01-05 devnull 

161 9aec88f2 2005-12-31 devnull 	if((fd = devsocket()) > 0){

162 9aec88f2 2005-12-31 devnull 		struct ifreq ifr;

163 9aec88f2 2005-12-31 devnull 

164 9aec88f2 2005-12-31 devnull 		memset(&ifr, 0, sizeof ifr);

165 9aec88f2 2005-12-31 devnull 		strncpy(ifr.ifr_name, p, IFNAMSIZ);

166 9aec88f2 2005-12-31 devnull 		ifr.ifr_mtu = 0;

167 9aec88f2 2005-12-31 devnull 		if(ioctl(fd, SIOCGIFMTU, &ifr) >= 0)

168 9aec88f2 2005-12-31 devnull 			ifc->rp.linkmtu = ifr.ifr_mtu;

169 9aec88f2 2005-12-31 devnull 

170 9aec88f2 2005-12-31 devnull 		memset(&ifr, 0, sizeof ifr);

171 9aec88f2 2005-12-31 devnull 		strncpy(ifr.ifr_name, p, IFNAMSIZ);

172 9aec88f2 2005-12-31 devnull 		if(ioctl(fd, SIOCGIFHWADDR, &ifr) >= 0

173 9aec88f2 2005-12-31 devnull 		&& ifr.ifr_hwaddr.sa_family == ARPHRD_ETHER)

174 9aec88f2 2005-12-31 devnull 			memmove(ifc->ether, ifr.ifr_hwaddr.sa_data, 6);

175 fa325e9b 2020-01-10 cross 

176 9aec88f2 2005-12-31 devnull 		close(fd);

177 9aec88f2 2005-12-31 devnull 	}

178 9aec88f2 2005-12-31 devnull 	return 0;

179 9aec88f2 2005-12-31 devnull }

180 9aec88f2 2005-12-31 devnull 

181 9aec88f2 2005-12-31 devnull static int

182 9aec88f2 2005-12-31 devnull getaddr(struct nlmsghdr *h, Ipifc **ipifclist, int index)

183 9aec88f2 2005-12-31 devnull {

184 9aec88f2 2005-12-31 devnull 	int mask;

185 9aec88f2 2005-12-31 devnull 	Ipifc *ifc;

186 9aec88f2 2005-12-31 devnull 	Iplifc *lifc, **l;

187 9aec88f2 2005-12-31 devnull 	struct ifaddrmsg *ifa;

188 9aec88f2 2005-12-31 devnull 	struct rtattr *attr[IFA_MAX+1];

189 fa325e9b 2020-01-10 cross 

190 9aec88f2 2005-12-31 devnull 	USED(index);

191 9aec88f2 2005-12-31 devnull 

192 9aec88f2 2005-12-31 devnull 	ifa = (struct ifaddrmsg*)NLMSG_DATA(h);

193 9aec88f2 2005-12-31 devnull 	for(ifc=*ipifclist; ifc; ifc=ifc->next)

194 9aec88f2 2005-12-31 devnull 		if(ifc->index == ifa->ifa_index)

195 9aec88f2 2005-12-31 devnull 			break;

196 9aec88f2 2005-12-31 devnull 	if(ifc == nil)

197 9aec88f2 2005-12-31 devnull 		return 0;

198 9aec88f2 2005-12-31 devnull 	if(parsertattr(attr, nelem(attr), h, RTM_NEWADDR, sizeof(struct ifaddrmsg)) < 0)

199 9aec88f2 2005-12-31 devnull 		return -1;

200 fa325e9b 2020-01-10 cross 

201 9aec88f2 2005-12-31 devnull 	lifc = mallocz(sizeof *lifc, 1);

202 9aec88f2 2005-12-31 devnull 	if(lifc == nil)

203 9aec88f2 2005-12-31 devnull 		return -1;

204 9aec88f2 2005-12-31 devnull 	for(l=&ifc->lifc; *l; l=&(*l)->next)

205 9aec88f2 2005-12-31 devnull 		;

206 9aec88f2 2005-12-31 devnull 	*l = lifc;

207 9aec88f2 2005-12-31 devnull 

208 9aec88f2 2005-12-31 devnull 	if(attr[IFA_ADDRESS] == nil)

209 9aec88f2 2005-12-31 devnull 		attr[IFA_ADDRESS] = attr[IFA_LOCAL];

210 9aec88f2 2005-12-31 devnull 	if(attr[IFA_ADDRESS] == nil)

211 9aec88f2 2005-12-31 devnull 		return 0;

212 9aec88f2 2005-12-31 devnull 

213 9aec88f2 2005-12-31 devnull 	rta2ip(ifa->ifa_family, lifc->ip, attr[IFA_ADDRESS]);

214 fa325e9b 2020-01-10 cross 

215 9aec88f2 2005-12-31 devnull 	mask = ifa->ifa_prefixlen/8;

216 9aec88f2 2005-12-31 devnull 	if(ifa->ifa_family == AF_INET)

217 9aec88f2 2005-12-31 devnull 		mask += IPv4off;

218 9aec88f2 2005-12-31 devnull 	memset(lifc->mask, 0xFF, mask);

219 9aec88f2 2005-12-31 devnull 	memmove(lifc->net, lifc->ip, mask);

220 fa325e9b 2020-01-10 cross 

221 9aec88f2 2005-12-31 devnull 	if(attr[IFA_CACHEINFO]){

222 9aec88f2 2005-12-31 devnull 		struct ifa_cacheinfo *ci;

223 9aec88f2 2005-12-31 devnull 

224 9aec88f2 2005-12-31 devnull 		ci = RTA_DATA(attr[IFA_CACHEINFO]);

225 9aec88f2 2005-12-31 devnull 		lifc->preflt = ci->ifa_prefered;

226 9aec88f2 2005-12-31 devnull 		lifc->validlt = ci->ifa_valid;

227 9aec88f2 2005-12-31 devnull 	}

228 9aec88f2 2005-12-31 devnull 	return 0;

229 9aec88f2 2005-12-31 devnull }

230 9aec88f2 2005-12-31 devnull 

231 9aec88f2 2005-12-31 devnull Ipifc*

232 9aec88f2 2005-12-31 devnull readipifc(char *net, Ipifc *ifc, int index)

233 9aec88f2 2005-12-31 devnull {

234 9aec88f2 2005-12-31 devnull 	int fd;

235 9aec88f2 2005-12-31 devnull 

236 9aec88f2 2005-12-31 devnull 	USED(net);

237 9aec88f2 2005-12-31 devnull 	freeipifc(ifc);

238 9aec88f2 2005-12-31 devnull 	ifc = nil;

239 fa325e9b 2020-01-10 cross 

240 9aec88f2 2005-12-31 devnull 	fd = socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE);

241 9aec88f2 2005-12-31 devnull 	if(fd < 0)

242 9aec88f2 2005-12-31 devnull 		return nil;

243 9aec88f2 2005-12-31 devnull 	ifc = nil;

244 9aec88f2 2005-12-31 devnull 	if(netlinkrequest(fd, RTM_GETLINK, getlink, &ifc, index) < 0

245 9aec88f2 2005-12-31 devnull 	|| netlinkrequest(fd, RTM_GETADDR, getaddr, &ifc, index) < 0){

246 9aec88f2 2005-12-31 devnull 		close(fd);

247 9aec88f2 2005-12-31 devnull 		freeipifc(ifc);

248 9aec88f2 2005-12-31 devnull 		return nil;

249 9aec88f2 2005-12-31 devnull 	}

250 9aec88f2 2005-12-31 devnull 	close(fd);

251 9aec88f2 2005-12-31 devnull 	return ifc;

252 9aec88f2 2005-12-31 devnull }