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// SPDX-License-Identifier: GPL-2.0
#include <stdio.h>
#include <string.h>
#include <ynl.h>
#include <arpa/inet.h>
#include <net/if.h>
#include "rt-link-user.h"
static void rt_link_print(struct rt_link_getlink_rsp *r)
{
unsigned int i;
printf("%3d: ", r->_hdr.ifi_index);
if (r->_len.ifname)
printf("%16s: ", r->ifname);
if (r->_present.mtu)
printf("mtu %5d ", r->mtu);
if (r->linkinfo._len.kind)
printf("kind %-8s ", r->linkinfo.kind);
else
printf(" %8s ", "");
if (r->prop_list._count.alt_ifname) {
printf("altname ");
for (i = 0; i < r->prop_list._count.alt_ifname; i++)
printf("%s ", r->prop_list.alt_ifname[i]->str);
printf(" ");
}
if (r->linkinfo._present.data && r->linkinfo.data._present.netkit) {
struct rt_link_linkinfo_netkit_attrs *netkit;
const char *name;
netkit = &r->linkinfo.data.netkit;
printf("primary %d ", netkit->primary);
name = NULL;
if (netkit->_present.policy)
name = rt_link_netkit_policy_str(netkit->policy);
if (name)
printf("policy %s ", name);
}
printf("\n");
}
static int rt_link_create_netkit(struct ynl_sock *ys)
{
struct rt_link_getlink_ntf *ntf_gl;
struct rt_link_newlink_req *req;
struct ynl_ntf_base_type *ntf;
int ret;
req = rt_link_newlink_req_alloc();
if (!req) {
fprintf(stderr, "Can't alloc req\n");
return -1;
}
/* rtnetlink doesn't provide info about the created object.
* It expects us to set the ECHO flag and the dig the info out
* of the notifications...
*/
rt_link_newlink_req_set_nlflags(req, NLM_F_CREATE | NLM_F_ECHO);
rt_link_newlink_req_set_linkinfo_kind(req, "netkit");
/* Test error messages */
rt_link_newlink_req_set_linkinfo_data_netkit_policy(req, 10);
ret = rt_link_newlink(ys, req);
if (ret) {
printf("Testing error message for policy being bad:\n\t%s\n", ys->err.msg);
} else {
fprintf(stderr, "Warning: unexpected success creating netkit with bad attrs\n");
goto created;
}
rt_link_newlink_req_set_linkinfo_data_netkit_policy(req, NETKIT_DROP);
ret = rt_link_newlink(ys, req);
created:
rt_link_newlink_req_free(req);
if (ret) {
fprintf(stderr, "YNL: %s\n", ys->err.msg);
return -1;
}
if (!ynl_has_ntf(ys)) {
fprintf(stderr,
"Warning: interface created but received no notification, won't delete the interface\n");
return 0;
}
ntf = ynl_ntf_dequeue(ys);
if (ntf->cmd != RTM_NEWLINK) {
fprintf(stderr,
"Warning: unexpected notification type, won't delete the interface\n");
return 0;
}
ntf_gl = (void *)ntf;
ret = ntf_gl->obj._hdr.ifi_index;
ynl_ntf_free(ntf);
return ret;
}
static void rt_link_del(struct ynl_sock *ys, int ifindex)
{
struct rt_link_dellink_req *req;
req = rt_link_dellink_req_alloc();
if (!req) {
fprintf(stderr, "Can't alloc req\n");
return;
}
req->_hdr.ifi_index = ifindex;
if (rt_link_dellink(ys, req))
fprintf(stderr, "YNL: %s\n", ys->err.msg);
else
fprintf(stderr,
"Trying to delete a Netkit interface (ifindex %d)\n",
ifindex);
rt_link_dellink_req_free(req);
}
int main(int argc, char **argv)
{
struct rt_link_getlink_req_dump *req;
struct rt_link_getlink_list *rsp;
struct ynl_error yerr;
struct ynl_sock *ys;
int created = 0;
ys = ynl_sock_create(&ynl_rt_link_family, &yerr);
if (!ys) {
fprintf(stderr, "YNL: %s\n", yerr.msg);
return 1;
}
if (argc > 1) {
fprintf(stderr, "Trying to create a Netkit interface\n");
created = rt_link_create_netkit(ys);
if (created < 0)
goto err_destroy;
}
req = rt_link_getlink_req_dump_alloc();
if (!req)
goto err_del_ifc;
rsp = rt_link_getlink_dump(ys, req);
rt_link_getlink_req_dump_free(req);
if (!rsp)
goto err_close;
if (ynl_dump_empty(rsp))
fprintf(stderr, "Error: no links reported\n");
ynl_dump_foreach(rsp, link)
rt_link_print(link);
rt_link_getlink_list_free(rsp);
if (created)
rt_link_del(ys, created);
ynl_sock_destroy(ys);
return 0;
err_close:
fprintf(stderr, "YNL: %s\n", ys->err.msg);
err_del_ifc:
if (created)
rt_link_del(ys, created);
err_destroy:
ynl_sock_destroy(ys);
return 2;
}
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