/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __NETWORK_HELPERS_H
#define __NETWORK_HELPERS_H
#include <arpa/inet.h>
#include <sys/socket.h>
#include <sys/types.h>
#include <linux/types.h>
typedef __u16 __sum16;
#include <linux/if_ether.h>
#include <linux/if_packet.h>
#include <linux/if_tun.h>
#include <linux/ip.h>
#include <linux/ipv6.h>
#include <linux/ethtool.h>
#include <linux/sockios.h>
#include <linux/err.h>
#include <netinet/tcp.h>
#include <netinet/udp.h>
#include <bpf/bpf_endian.h>
#include <net/if .h>
#include <stdio.h>
#define MAGIC_VAL 0 x1234
#define NUM_ITER 100000
#define VIP_NUM 5
#define MAGIC_BYTES 123
struct network_helper_opts {
int timeout_ms;
int proto;
/* +ve: Passed to listen() as-is.
* 0 : Default when the test does not set
* a particular value during the struct init .
* It is changed to 1 before passing to listen ( ) .
* Most tests only have one on - going connection .
* - ve : It is changed to 0 before passing to listen ( ) .
* It is useful to force syncookie without
* changing the " tcp_syncookies " sysctl from 1 to 2 .
*/
int backlog;
int (*post_socket_cb)(int fd, void *opts);
void *cb_opts;
};
/* ipv4 test vector */
struct ipv4_packet {
struct ethhdr eth;
struct iphdr iph;
struct tcphdr tcp;
} __packed;
extern struct ipv4_packet pkt_v4;
/* ipv6 test vector */
struct ipv6_packet {
struct ethhdr eth;
struct ipv6hdr iph;
struct tcphdr tcp;
} __packed;
extern struct ipv6_packet pkt_v6;
int settimeo(int fd, int timeout_ms);
int start_server_str(int family, int type, const char *addr_str, __u16 port,
const struct network_helper_opts *opts);
int start_server(int family, int type, const char *addr, __u16 port,
int timeout_ms);
int *start_reuseport_server(int family, int type, const char *addr_str,
__u16 port, int timeout_ms,
unsigned int nr_listens);
int start_server_addr(int type, const struct sockaddr_storage *addr, socklen_t len,
const struct network_helper_opts *opts);
void free_fds(int *fds, unsigned int nr_close_fds);
int client_socket(int family, int type,
const struct network_helper_opts *opts);
int connect_to_addr(int type, const struct sockaddr_storage *addr, socklen_t len,
const struct network_helper_opts *opts);
int connect_to_addr_str(int family, int type, const char *addr_str, __u16 port,
const struct network_helper_opts *opts);
int connect_to_fd(int server_fd, int timeout_ms);
int connect_to_fd_opts(int server_fd, const struct network_helper_opts *opts);
int connect_fd_to_fd(int client_fd, int server_fd, int timeout_ms);
int fastopen_connect(int server_fd, const char *data, unsigned int data_len,
int timeout_ms);
int make_sockaddr(int family, const char *addr_str, __u16 port,
struct sockaddr_storage *addr, socklen_t *len);
char *ping_command(int family);
int get_socket_local_port(int sock_fd);
int get_hw_ring_size(char *ifname, struct ethtool_ringparam *ring_param);
int set_hw_ring_size(char *ifname, struct ethtool_ringparam *ring_param);
int open_tuntap(const char *dev_name, bool need_mac);
struct nstoken;
/**
* open_netns ( ) - Switch to specified network namespace by name .
*
* Returns token with which to restore the original namespace
* using close_netns ( ) .
*/
struct nstoken *open_netns(const char *name);
void close_netns(struct nstoken *token);
int send_recv_data(int lfd, int fd, uint32_t total_bytes);
int make_netns(const char *name);
int remove_netns(const char *name);
/**
* append_tid ( ) - Append thread ID to the given string .
*
* @ str : string to extend
* @ sz : string ' s size
*
* 8 characters are used to append the thread ID ( 7 digits + ' \ 0 ' )
*
* Returns - 1 on errors , 0 otherwise
*/
int append_tid(char *str, size_t sz);
static __u16 csum_fold(__u32 csum)
{
csum = (csum & 0 xffff) + (csum >> 16 );
csum = (csum & 0 xffff) + (csum >> 16 );
return (__u16)~csum;
}
static __wsum csum_partial(const void *buf, int len, __wsum sum)
{
__u16 *p = (__u16 *)buf;
int num_u16 = len >> 1 ;
int i;
for (i = 0 ; i < num_u16; i++)
sum += p[i];
return sum;
}
static inline __sum16 build_ip_csum(struct iphdr *iph)
{
__u32 sum = 0 ;
__u16 *p;
iph->check = 0 ;
p = (void *)iph;
sum = csum_partial(p, iph->ihl << 2 , 0 );
return csum_fold(sum);
}
/**
* csum_tcpudp_magic - compute IP pseudo - header checksum
*
* Compute the IPv4 pseudo header checksum . The helper can take a
* accumulated sum from the transport layer to accumulate it and directly
* return the transport layer
*
* @ saddr : IP source address
* @ daddr : IP dest address
* @ len : IP data size
* @ proto : transport layer protocol
* @ csum : The accumulated partial sum to add to the computation
*
* Returns the folded sum
*/
static inline __sum16 csum_tcpudp_magic(__be32 saddr, __be32 daddr,
__u32 len, __u8 proto,
__wsum csum)
{
__u64 s = csum;
s += (__u32)saddr;
s += (__u32)daddr;
s += htons(proto + len);
s = (s & 0 xffffffff) + (s >> 32 );
s = (s & 0 xffffffff) + (s >> 32 );
return csum_fold((__u32)s);
}
/**
* csum_ipv6_magic - compute IPv6 pseudo - header checksum
*
* Compute the ipv6 pseudo header checksum . The helper can take a
* accumulated sum from the transport layer to accumulate it and directly
* return the transport layer
*
* @ saddr : IPv6 source address
* @ daddr : IPv6 dest address
* @ len : IPv6 data size
* @ proto : transport layer protocol
* @ csum : The accumulated partial sum to add to the computation
*
* Returns the folded sum
*/
static inline __sum16 csum_ipv6_magic(const struct in6_addr *saddr,
const struct in6_addr *daddr,
__u32 len, __u8 proto,
__wsum csum)
{
__u64 s = csum;
int i;
for (i = 0 ; i < 4 ; i++)
s += (__u32)saddr->s6_addr32[i];
for (i = 0 ; i < 4 ; i++)
s += (__u32)daddr->s6_addr32[i];
s += htons(proto + len);
s = (s & 0 xffffffff) + (s >> 32 );
s = (s & 0 xffffffff) + (s >> 32 );
return csum_fold((__u32)s);
}
/**
* build_udp_v4_csum - compute UDP checksum for UDP over IPv4
*
* Compute the checksum to embed in UDP header , composed of the sum of IP
* pseudo - header checksum , UDP header checksum and UDP data checksum
* @ iph IP header
* @ udph UDP header , which must be immediately followed by UDP data
*
* Returns the total checksum
*/
static inline __sum16 build_udp_v4_csum(const struct iphdr *iph,
const struct udphdr *udph)
{
unsigned long sum;
sum = csum_partial(udph, ntohs(udph->len), 0 );
return csum_tcpudp_magic(iph->saddr, iph->daddr, ntohs(udph->len),
IPPROTO_UDP, sum);
}
/**
* build_udp_v6_csum - compute UDP checksum for UDP over IPv6
*
* Compute the checksum to embed in UDP header , composed of the sum of IPv6
* pseudo - header checksum , UDP header checksum and UDP data checksum
* @ ip6h IPv6 header
* @ udph UDP header , which must be immediately followed by UDP data
*
* Returns the total checksum
*/
static inline __sum16 build_udp_v6_csum(const struct ipv6hdr *ip6h,
const struct udphdr *udph)
{
unsigned long sum;
sum = csum_partial(udph, ntohs(udph->len), 0 );
return csum_ipv6_magic(&ip6h->saddr, &ip6h->daddr, ntohs(udph->len),
IPPROTO_UDP, sum);
}
struct tmonitor_ctx;
typedef int (*tm_print_fn_t)(const char *format, va_list args);
#ifdef TRAFFIC_MONITOR
struct tmonitor_ctx *traffic_monitor_start(const char *netns, const char *test_name,
const char *subtest_name);
void traffic_monitor_stop(struct tmonitor_ctx *ctx);
tm_print_fn_t traffic_monitor_set_print(tm_print_fn_t fn);
#else
static inline struct tmonitor_ctx *traffic_monitor_start(const char *netns, const char *test_name,
const char *subtest_name)
{
return NULL;
}
static inline void traffic_monitor_stop(struct tmonitor_ctx *ctx)
{
}
static inline tm_print_fn_t traffic_monitor_set_print(tm_print_fn_t fn)
{
return NULL;
}
#endif
#endif
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