1 /* 2 * link_veth.c veth driver module 3 * 4 * This program is free software; you can redistribute it and/or 5 * modify it under the terms of the GNU General Public License 6 * as published by the Free Software Foundation; either version 7 * 2 of the License, or (at your option) any later version. 8 * 9 * Authors: Pavel Emelianov <xemul (at) openvz.org> 10 * 11 */ 12 13 #include <string.h> 14 #include <net/if.h> 15 #include <linux/veth.h> 16 17 #include "utils.h" 18 #include "ip_common.h" 19 20 static void usage(void) 21 { 22 printf("Usage: ip link <options> type veth " 23 "[peer <options>]\nTo get <options> type " 24 "'ip link add help'\n"); 25 } 26 27 static int veth_parse_opt(struct link_util *lu, int argc, char **argv, 28 struct nlmsghdr *hdr) 29 { 30 char *name, *type, *link, *dev; 31 int err, len; 32 struct rtattr * data; 33 34 if (strcmp(argv[0], "peer") != 0) { 35 usage(); 36 return -1; 37 } 38 39 data = NLMSG_TAIL(hdr); 40 addattr_l(hdr, 1024, VETH_INFO_PEER, NULL, 0); 41 42 hdr->nlmsg_len += sizeof(struct ifinfomsg); 43 44 err = iplink_parse(argc - 1, argv + 1, (struct iplink_req *)hdr, 45 &name, &type, &link, &dev); 46 if (err < 0) 47 return err; 48 49 if (name) { 50 len = strlen(name) + 1; 51 if (len > IFNAMSIZ) 52 invarg("\"name\" too long\n", *argv); 53 addattr_l(hdr, 1024, IFLA_IFNAME, name, len); 54 } 55 56 data->rta_len = (void *)NLMSG_TAIL(hdr) - (void *)data; 57 return argc - 1 - err; 58 } 59 60 struct link_util veth_link_util = { 61 .id = "veth", 62 .parse_opt = veth_parse_opt, 63 }; 64
