1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef __NETWORK_HELPERS_H
3 #define __NETWORK_HELPERS_H
4 #include <sys/socket.h>
5 #include <sys/types.h>
6 #include <linux/types.h>
7 typedef __u16 __sum16;
8 #include <linux/if_ether.h>
9 #include <linux/if_packet.h>
10 #include <linux/ip.h>
11 #include <linux/ipv6.h>
12 #include <linux/ethtool.h>
13 #include <linux/sockios.h>
14 #include <linux/err.h>
15 #include <netinet/tcp.h>
16 #include <bpf/bpf_endian.h>
17 #include <net/if.h>
18
19 #define MAGIC_VAL 0x1234
20 #define NUM_ITER 100000
21 #define VIP_NUM 5
22 #define MAGIC_BYTES 123
23
24 struct network_helper_opts {
25 int timeout_ms;
26 int proto;
27 /* +ve: Passed to listen() as-is.
28 * 0: Default when the test does not set
29 * a particular value during the struct init.
30 * It is changed to 1 before passing to listen().
31 * Most tests only have one on-going connection.
32 * -ve: It is changed to 0 before passing to listen().
33 * It is useful to force syncookie without
34 * changing the "tcp_syncookies" sysctl from 1 to 2.
35 */
36 int backlog;
37 int (*post_socket_cb)(int fd, void *opts);
38 void *cb_opts;
39 };
40
41 /* ipv4 test vector */
42 struct ipv4_packet {
43 struct ethhdr eth;
44 struct iphdr iph;
45 struct tcphdr tcp;
46 } __packed;
47 extern struct ipv4_packet pkt_v4;
48
49 /* ipv6 test vector */
50 struct ipv6_packet {
51 struct ethhdr eth;
52 struct ipv6hdr iph;
53 struct tcphdr tcp;
54 } __packed;
55 extern struct ipv6_packet pkt_v6;
56
57 int settimeo(int fd, int timeout_ms);
58 int start_server_str(int family, int type, const char *addr_str, __u16 port,
59 const struct network_helper_opts *opts);
60 int start_server(int family, int type, const char *addr, __u16 port,
61 int timeout_ms);
62 int *start_reuseport_server(int family, int type, const char *addr_str,
63 __u16 port, int timeout_ms,
64 unsigned int nr_listens);
65 int start_server_addr(int type, const struct sockaddr_storage *addr, socklen_t len,
66 const struct network_helper_opts *opts);
67 void free_fds(int *fds, unsigned int nr_close_fds);
68 int client_socket(int family, int type,
69 const struct network_helper_opts *opts);
70 int connect_to_addr(int type, const struct sockaddr_storage *addr, socklen_t len,
71 const struct network_helper_opts *opts);
72 int connect_to_addr_str(int family, int type, const char *addr_str, __u16 port,
73 const struct network_helper_opts *opts);
74 int connect_to_fd(int server_fd, int timeout_ms);
75 int connect_to_fd_opts(int server_fd, const struct network_helper_opts *opts);
76 int connect_fd_to_fd(int client_fd, int server_fd, int timeout_ms);
77 int fastopen_connect(int server_fd, const char *data, unsigned int data_len,
78 int timeout_ms);
79 int make_sockaddr(int family, const char *addr_str, __u16 port,
80 struct sockaddr_storage *addr, socklen_t *len);
81 char *ping_command(int family);
82 int get_socket_local_port(int sock_fd);
83 int get_hw_ring_size(char *ifname, struct ethtool_ringparam *ring_param);
84 int set_hw_ring_size(char *ifname, struct ethtool_ringparam *ring_param);
85
86 struct nstoken;
87 /**
88 * open_netns() - Switch to specified network namespace by name.
89 *
90 * Returns token with which to restore the original namespace
91 * using close_netns().
92 */
93 struct nstoken *open_netns(const char *name);
94 void close_netns(struct nstoken *token);
95 int send_recv_data(int lfd, int fd, uint32_t total_bytes);
96 int make_netns(const char *name);
97 int remove_netns(const char *name);
98
csum_fold(__u32 csum)99 static __u16 csum_fold(__u32 csum)
100 {
101 csum = (csum & 0xffff) + (csum >> 16);
102 csum = (csum & 0xffff) + (csum >> 16);
103
104 return (__u16)~csum;
105 }
106
csum_tcpudp_magic(__be32 saddr,__be32 daddr,__u32 len,__u8 proto,__wsum csum)107 static inline __sum16 csum_tcpudp_magic(__be32 saddr, __be32 daddr,
108 __u32 len, __u8 proto,
109 __wsum csum)
110 {
111 __u64 s = csum;
112
113 s += (__u32)saddr;
114 s += (__u32)daddr;
115 s += htons(proto + len);
116 s = (s & 0xffffffff) + (s >> 32);
117 s = (s & 0xffffffff) + (s >> 32);
118
119 return csum_fold((__u32)s);
120 }
121
csum_ipv6_magic(const struct in6_addr * saddr,const struct in6_addr * daddr,__u32 len,__u8 proto,__wsum csum)122 static inline __sum16 csum_ipv6_magic(const struct in6_addr *saddr,
123 const struct in6_addr *daddr,
124 __u32 len, __u8 proto,
125 __wsum csum)
126 {
127 __u64 s = csum;
128 int i;
129
130 for (i = 0; i < 4; i++)
131 s += (__u32)saddr->s6_addr32[i];
132 for (i = 0; i < 4; i++)
133 s += (__u32)daddr->s6_addr32[i];
134 s += htons(proto + len);
135 s = (s & 0xffffffff) + (s >> 32);
136 s = (s & 0xffffffff) + (s >> 32);
137
138 return csum_fold((__u32)s);
139 }
140
141 struct tmonitor_ctx;
142
143 #ifdef TRAFFIC_MONITOR
144 struct tmonitor_ctx *traffic_monitor_start(const char *netns, const char *test_name,
145 const char *subtest_name);
146 void traffic_monitor_stop(struct tmonitor_ctx *ctx);
147 #else
traffic_monitor_start(const char * netns,const char * test_name,const char * subtest_name)148 static inline struct tmonitor_ctx *traffic_monitor_start(const char *netns, const char *test_name,
149 const char *subtest_name)
150 {
151 return NULL;
152 }
153
traffic_monitor_stop(struct tmonitor_ctx * ctx)154 static inline void traffic_monitor_stop(struct tmonitor_ctx *ctx)
155 {
156 }
157 #endif
158
159 #endif
160