libnl: /data/src/libnl3/lib/route/act/mirred.c Source File

libnl 3.7.0

mirred.c
1 /* SPDX-License-Identifier: LGPL-2.1-only */
2 /*
3 * Copyright (c) 2013 Cong Wang <xiyou.wangcong@gmail.com>
4 */
5
6 /**
7 * @ingroup act
8 * @defgroup act_mirred Mirror and Redirect
9 *
10 * @{
11 */
12
13 #include <netlink-private/netlink.h>
14 #include <netlink-private/tc.h>
15 #include <netlink/netlink.h>
16 #include <netlink/attr.h>
17 #include <netlink/utils.h>
18 #include <netlink-private/route/tc-api.h>
19 #include <netlink/route/act/mirred.h>
20
21 static struct nla_policy mirred_policy[TCA_MIRRED_MAX + 1] = {
22 [TCA_MIRRED_PARMS] = { .minlen = sizeof(struct tc_mirred) },
23 };
24
25 static int mirred_msg_parser(struct rtnl_tc *tc, void *data)
26 {
27 struct rtnl_mirred *u = data;
28 struct nlattr *tb[TCA_MIRRED_MAX + 1];
29 int err;
30
31 err = tca_parse(tb, TCA_MIRRED_MAX, tc, mirred_policy);
32 if (err < 0)
33 return err;
34
35 if (!tb[TCA_MIRRED_PARMS])
36 return -NLE_MISSING_ATTR;
37
38 nla_memcpy(&u->m_parm, tb[TCA_MIRRED_PARMS], sizeof(u->m_parm));
39 return 0;
40 }
41
42 static void mirred_free_data(struct rtnl_tc *tc, void *data)
43 {
44 }
45
46 static void mirred_dump_line(struct rtnl_tc *tc, void *data,
47 struct nl_dump_params *p)
48 {
49 struct rtnl_mirred *u = data;
50 if (!u)
51 return;
52
53 nl_dump(p, " index %u", u->m_parm.ifindex);
54
55 if (u->m_parm.eaction == TCA_EGRESS_MIRROR)
56 nl_dump(p, " egress mirror");
57 else if (u->m_parm.eaction == TCA_EGRESS_REDIR)
58 nl_dump(p, " egress redirect");
59
60 switch(u->m_parm.action) {
61 case TC_ACT_UNSPEC:
62 nl_dump(p, " unspecified");
63 break;
64 case TC_ACT_PIPE:
65 nl_dump(p, " pipe");
66 break;
67 case TC_ACT_STOLEN:
68 nl_dump(p, " stolen");
69 break;
70 case TC_ACT_SHOT:
71 nl_dump(p, " shot");
72 break;
73 case TC_ACT_QUEUED:
74 nl_dump(p, " queued");
75 break;
76 case TC_ACT_REPEAT:
77 nl_dump(p, " repeat");
78 break;
79 }
80 }
81
82 static void mirred_dump_details(struct rtnl_tc *tc, void *data,
83 struct nl_dump_params *p)
84 {
85 }
86
87 static void mirred_dump_stats(struct rtnl_tc *tc, void *data,
88 struct nl_dump_params *p)
89 {
90 struct rtnl_mirred *u = data;
91
92 if (!u)
93 return;
94 /* TODO */
95 }
96
97
98 static int mirred_msg_fill(struct rtnl_tc *tc, void *data, struct nl_msg *msg)
99 {
100 struct rtnl_mirred *u = data;
101
102 if (!u)
103 return 0;
104
105 NLA_PUT(msg, TCA_MIRRED_PARMS, sizeof(u->m_parm), &u->m_parm);
106 return 0;
107
108 nla_put_failure:
109 return -NLE_NOMEM;
110 }
111
112 /**
113 * @name Attribute Modifications
114 * @{
115 */
116
117 int rtnl_mirred_set_action(struct rtnl_act *act, int action)
118 {
119 struct rtnl_mirred *u;
120
121 if (!(u = (struct rtnl_mirred *) rtnl_tc_data(TC_CAST(act))))
122 return -NLE_NOMEM;
123
124 if (action > TCA_INGRESS_MIRROR || action < TCA_EGRESS_REDIR)
125 return -NLE_INVAL;
126
127 switch (action) {
128 case TCA_EGRESS_MIRROR:
129 case TCA_EGRESS_REDIR:
130 u->m_parm.eaction = action;
131 break;
132 case TCA_INGRESS_REDIR:
133 case TCA_INGRESS_MIRROR:
134 default:
135 return NLE_OPNOTSUPP;
136 }
137 return 0;
138 }
139
140 int rtnl_mirred_get_action(struct rtnl_act *act)
141 {
142 struct rtnl_mirred *u;
143
144 if (!(u = (struct rtnl_mirred *) rtnl_tc_data(TC_CAST(act))))
145 return -NLE_NOMEM;
146 return u->m_parm.eaction;
147 }
148
149 int rtnl_mirred_set_ifindex(struct rtnl_act *act, uint32_t ifindex)
150 {
151 struct rtnl_mirred *u;
152
153 if (!(u = (struct rtnl_mirred *) rtnl_tc_data(TC_CAST(act))))
154 return -NLE_NOMEM;
155
156 u->m_parm.ifindex = ifindex;
157 return 0;
158 }
159
160 uint32_t rtnl_mirred_get_ifindex(struct rtnl_act *act)
161 {
162 struct rtnl_mirred *u;
163
164 if ((u = (struct rtnl_mirred *) rtnl_tc_data(TC_CAST(act))))
165 return u->m_parm.ifindex;
166 return 0;
167 }
168
169 int rtnl_mirred_set_policy(struct rtnl_act *act, int policy)
170 {
171 struct rtnl_mirred *u;
172
173 if (!(u = (struct rtnl_mirred *) rtnl_tc_data(TC_CAST(act))))
174 return -NLE_NOMEM;
175
176 u->m_parm.action = policy;
177
178 return 0;
179 }
180
181 int rtnl_mirred_get_policy(struct rtnl_act *act)
182 {
183 struct rtnl_mirred *u;
184
185 if (!(u = (struct rtnl_mirred *) rtnl_tc_data(TC_CAST(act))))
186 return -NLE_NOMEM;
187 return u->m_parm.action;
188 }
189
190 /** @} */
191
192 static struct rtnl_tc_ops mirred_ops = {
193 .to_kind = "mirred",
194 .to_type = RTNL_TC_TYPE_ACT,
195 .to_size = sizeof(struct rtnl_mirred),
196 .to_msg_parser = mirred_msg_parser,
197 .to_free_data = mirred_free_data,
198 .to_clone = NULL,
199 .to_msg_fill = mirred_msg_fill,
200 .to_dump = {
201 [NL_DUMP_LINE] = mirred_dump_line,
202 [NL_DUMP_DETAILS] = mirred_dump_details,
203 [NL_DUMP_STATS] = mirred_dump_stats,
204 },
205 };
206
207 static void __init mirred_init(void)
208 {
209 rtnl_tc_register(&mirred_ops);
210 }
211
212 static void __exit mirred_exit(void)
213 {
214 rtnl_tc_unregister(&mirred_ops);
215 }
216
217 /** @} */
NLA_PUT
#define NLA_PUT(msg, attrtype, attrlen, data)
Add unspecific attribute to netlink message.
Definition: attr.h:159
nla_memcpy
int nla_memcpy(void *dest, const struct nlattr *src, int count)
Copy attribute payload to another memory area.
Definition: attr.c:346
rtnl_tc_data
void * rtnl_tc_data(struct rtnl_tc *tc)
Return pointer to private data of traffic control object.
Definition: tc.c:1076
TC_CAST
#define TC_CAST(ptr)
Macro to cast qdisc/class/classifier to tc object.
Definition: tc.h:50
rtnl_tc_register
int rtnl_tc_register(struct rtnl_tc_ops *ops)
Register a traffic control module.
Definition: tc.c:1015
rtnl_tc_unregister
void rtnl_tc_unregister(struct rtnl_tc_ops *ops)
Unregister a traffic control module.
Definition: tc.c:1049
nl_dump
void nl_dump(struct nl_dump_params *params, const char *fmt,...)
Dump a formatted character string.
Definition: utils.c:955
NL_DUMP_STATS
@ NL_DUMP_STATS
Dump all attributes including statistics.
Definition: types.h:18
NL_DUMP_LINE
@ NL_DUMP_LINE
Dump object briefly on one line.
Definition: types.h:16
NL_DUMP_DETAILS
@ NL_DUMP_DETAILS
Dump all attributes but no statistics.
Definition: types.h:17
nl_dump_params
Dumping parameters.
Definition: types.h:28
nla_policy
Attribute validation policy.
Definition: attr.h:63
nla_policy::minlen
uint16_t minlen
Minimal length of payload required.
Definition: attr.h:68