tools/testing/selftests/net/tuntap_helpers.h

Source file repositories/reference/linux-study-clean/tools/testing/selftests/net/tuntap_helpers.h

File Facts

System
Linux kernel
Corpus path
tools/testing/selftests/net/tuntap_helpers.h
Extension
.h
Size
9881 bytes
Lines
391
Domain
Support Tooling And Documentation
Bucket
tools
Inferred role
Support Tooling And Documentation: implementation source
Status
source implementation candidate

Why This File Exists

Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.

Dependency Surface

Detected Declarations

Annotated Snippet

#ifndef _TUNTAP_HELPERS_H
#define _TUNTAP_HELPERS_H

#include <errno.h>
#include <linux/if_packet.h>
#include <linux/ipv6.h>
#include <linux/virtio_net.h>
#include <netinet/in.h>
#include <netinet/if_ether.h>
#include <netinet/udp.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <ynl.h>

#include "rt-route-user.h"
#include "rt-addr-user.h"
#include "rt-neigh-user.h"
#include "rt-link-user.h"

#define GENEVE_HLEN 8
#define PKT_DATA 0xCB
#define TUNTAP_DEFAULT_TTL 8
#define TUNTAP_DEFAULT_IPID 1337

unsigned int if_nametoindex(const char *ifname);

static inline int ip_addr_len(int family)
{
	return (family == AF_INET) ? sizeof(struct in_addr) :
				     sizeof(struct in6_addr);
}

static inline void fill_ifaddr_msg(struct ifaddrmsg *ifam, int family,
				   int prefix, int flags, const char *dev)
{
	ifam->ifa_family = family;
	ifam->ifa_prefixlen = prefix;
	ifam->ifa_index = if_nametoindex(dev);
	ifam->ifa_flags = flags;
	ifam->ifa_scope = RT_SCOPE_UNIVERSE;
}

static inline int ip_addr_add(const char *dev, int family, void *addr,
			      uint8_t prefix)
{
	int nl_flags = NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL;
	int ifa_flags = IFA_F_PERMANENT | IFA_F_NODAD;
	int ret = -1, ipalen = ip_addr_len(family);
	struct rt_addr_newaddr_req *req;
	struct ynl_sock *ys;

	ys = ynl_sock_create(&ynl_rt_addr_family, NULL);
	if (!ys)
		return -1;

	req = rt_addr_newaddr_req_alloc();
	if (!req)
		goto err_req_alloc;

	fill_ifaddr_msg(&req->_hdr, family, prefix, ifa_flags, dev);
	rt_addr_newaddr_req_set_nlflags(req, nl_flags);
	rt_addr_newaddr_req_set_local(req, addr, ipalen);

	ret = rt_addr_newaddr(ys, req);
	rt_addr_newaddr_req_free(req);
err_req_alloc:
	ynl_sock_destroy(ys);
	return ret;
}

static inline void fill_neigh_req_header(struct ndmsg *ndm, int family,
					 int state, const char *dev)
{
	ndm->ndm_family = family;
	ndm->ndm_ifindex = if_nametoindex(dev);
	ndm->ndm_state = state;
	ndm->ndm_flags = 0;
	ndm->ndm_type = RTN_UNICAST;
}

static inline int ip_neigh_add(const char *dev, int family, void *addr,
			       unsigned char *lladdr)
{
	int nl_flags = NLM_F_REQUEST | NLM_F_CREATE | NLM_F_EXCL;
	int ret = -1, ipalen = ip_addr_len(family);
	struct rt_neigh_newneigh_req *req;
	struct ynl_sock *ys;

Annotation

Implementation Notes