link_veth.c revision 118c923cc09551d3428e2905a69c07c5719988e5
12da55b1bbed22e1058627f6b262158349b2b142ePavel Emelianov/* 22da55b1bbed22e1058627f6b262158349b2b142ePavel Emelianov * link_veth.c veth driver module 32da55b1bbed22e1058627f6b262158349b2b142ePavel Emelianov * 42da55b1bbed22e1058627f6b262158349b2b142ePavel Emelianov * This program is free software; you can redistribute it and/or 52da55b1bbed22e1058627f6b262158349b2b142ePavel Emelianov * modify it under the terms of the GNU General Public License 62da55b1bbed22e1058627f6b262158349b2b142ePavel Emelianov * as published by the Free Software Foundation; either version 72da55b1bbed22e1058627f6b262158349b2b142ePavel Emelianov * 2 of the License, or (at your option) any later version. 82da55b1bbed22e1058627f6b262158349b2b142ePavel Emelianov * 92da55b1bbed22e1058627f6b262158349b2b142ePavel Emelianov * Authors: Pavel Emelianov <xemul@openvz.org> 102da55b1bbed22e1058627f6b262158349b2b142ePavel Emelianov * 112da55b1bbed22e1058627f6b262158349b2b142ePavel Emelianov */ 122da55b1bbed22e1058627f6b262158349b2b142ePavel Emelianov 132da55b1bbed22e1058627f6b262158349b2b142ePavel Emelianov#include <string.h> 14c595fda55bfed9753851de5675aa310f523564b3Stephen Hemminger#include <net/if.h> 15118c923cc09551d3428e2905a69c07c5719988e5Stephen Hemminger#include <linux/veth.h> 162da55b1bbed22e1058627f6b262158349b2b142ePavel Emelianov 172da55b1bbed22e1058627f6b262158349b2b142ePavel Emelianov#include "utils.h" 182da55b1bbed22e1058627f6b262158349b2b142ePavel Emelianov#include "ip_common.h" 192da55b1bbed22e1058627f6b262158349b2b142ePavel Emelianov 202da55b1bbed22e1058627f6b262158349b2b142ePavel Emelianovstatic void usage(void) 212da55b1bbed22e1058627f6b262158349b2b142ePavel Emelianov{ 22f9329ccaf933a9dee5760de6979c7be6f17e253fVitaliy Gusev printf("Usage: ip link <options> type veth " 23c595fda55bfed9753851de5675aa310f523564b3Stephen Hemminger "[peer <options>]\nTo get <options> type " 24c595fda55bfed9753851de5675aa310f523564b3Stephen Hemminger "'ip link add help'\n"); 252da55b1bbed22e1058627f6b262158349b2b142ePavel Emelianov} 262da55b1bbed22e1058627f6b262158349b2b142ePavel Emelianov 272da55b1bbed22e1058627f6b262158349b2b142ePavel Emelianovstatic int veth_parse_opt(struct link_util *lu, int argc, char **argv, 28c595fda55bfed9753851de5675aa310f523564b3Stephen Hemminger struct nlmsghdr *hdr) 292da55b1bbed22e1058627f6b262158349b2b142ePavel Emelianov{ 30f9329ccaf933a9dee5760de6979c7be6f17e253fVitaliy Gusev char *name, *type, *link, *dev; 31f9329ccaf933a9dee5760de6979c7be6f17e253fVitaliy Gusev int err, len; 32f9329ccaf933a9dee5760de6979c7be6f17e253fVitaliy Gusev struct rtattr * data; 332da55b1bbed22e1058627f6b262158349b2b142ePavel Emelianov 34f9329ccaf933a9dee5760de6979c7be6f17e253fVitaliy Gusev if (strcmp(argv[0], "peer") != 0) { 35f9329ccaf933a9dee5760de6979c7be6f17e253fVitaliy Gusev usage(); 36f9329ccaf933a9dee5760de6979c7be6f17e253fVitaliy Gusev return -1; 37f9329ccaf933a9dee5760de6979c7be6f17e253fVitaliy Gusev } 382da55b1bbed22e1058627f6b262158349b2b142ePavel Emelianov 39f9329ccaf933a9dee5760de6979c7be6f17e253fVitaliy Gusev data = NLMSG_TAIL(hdr); 40f9329ccaf933a9dee5760de6979c7be6f17e253fVitaliy Gusev addattr_l(hdr, 1024, VETH_INFO_PEER, NULL, 0); 412da55b1bbed22e1058627f6b262158349b2b142ePavel Emelianov 42f9329ccaf933a9dee5760de6979c7be6f17e253fVitaliy Gusev hdr->nlmsg_len += sizeof(struct ifinfomsg); 432da55b1bbed22e1058627f6b262158349b2b142ePavel Emelianov 44f9329ccaf933a9dee5760de6979c7be6f17e253fVitaliy Gusev err = iplink_parse(argc - 1, argv + 1, (struct iplink_req *)hdr, 45c595fda55bfed9753851de5675aa310f523564b3Stephen Hemminger &name, &type, &link, &dev); 46f9329ccaf933a9dee5760de6979c7be6f17e253fVitaliy Gusev if (err < 0) 47f9329ccaf933a9dee5760de6979c7be6f17e253fVitaliy Gusev return err; 482da55b1bbed22e1058627f6b262158349b2b142ePavel Emelianov 49f9329ccaf933a9dee5760de6979c7be6f17e253fVitaliy Gusev if (name) { 50f9329ccaf933a9dee5760de6979c7be6f17e253fVitaliy Gusev len = strlen(name) + 1; 51f9329ccaf933a9dee5760de6979c7be6f17e253fVitaliy Gusev if (len > IFNAMSIZ) 52f9329ccaf933a9dee5760de6979c7be6f17e253fVitaliy Gusev invarg("\"name\" too long\n", *argv); 53f9329ccaf933a9dee5760de6979c7be6f17e253fVitaliy Gusev addattr_l(hdr, 1024, IFLA_IFNAME, name, len); 542da55b1bbed22e1058627f6b262158349b2b142ePavel Emelianov } 552da55b1bbed22e1058627f6b262158349b2b142ePavel Emelianov 56f9329ccaf933a9dee5760de6979c7be6f17e253fVitaliy Gusev data->rta_len = (void *)NLMSG_TAIL(hdr) - (void *)data; 57f9329ccaf933a9dee5760de6979c7be6f17e253fVitaliy Gusev return argc - 1 - err; 582da55b1bbed22e1058627f6b262158349b2b142ePavel Emelianov} 592da55b1bbed22e1058627f6b262158349b2b142ePavel Emelianov 602da55b1bbed22e1058627f6b262158349b2b142ePavel Emelianovstruct link_util veth_link_util = { 612da55b1bbed22e1058627f6b262158349b2b142ePavel Emelianov .id = "veth", 622da55b1bbed22e1058627f6b262158349b2b142ePavel Emelianov .parse_opt = veth_parse_opt, 632da55b1bbed22e1058627f6b262158349b2b142ePavel Emelianov}; 64