libnl  3.6.0
nl-class-add.c
1 /* SPDX-License-Identifier: LGPL-2.1-only */
2 /*
3  * Copyright (c) 2010 Thomas Graf <tgraf@suug.ch>
4  */
5 
6 #include <netlink/cli/utils.h>
7 #include <netlink/cli/tc.h>
8 #include <netlink/cli/qdisc.h>
9 #include <netlink/cli/class.h>
10 #include <netlink/cli/link.h>
11 
12 #include <netlink-private/route/tc-api.h>
13 
14 #include <linux/netlink.h>
15 
16 static int quiet = 0;
17 
18 static void print_usage(void)
19 {
20  printf(
21 "Usage: nl-class-add [OPTIONS]... class [CONFIGURATION]...\n"
22 "\n"
23 "OPTIONS\n"
24 " -q, --quiet Do not print informal notifications.\n"
25 " -h, --help Show this help text.\n"
26 " -v, --version Show versioning information.\n"
27 " --update Update class if it exists.\n"
28 " --update-only Only update class, never create it.\n"
29 " -d, --dev=DEV Network device the class should be attached to.\n"
30 " -i, --id=ID ID of new class (default: auto-generated)\n"
31 " -p, --parent=ID ID of parent { root | ingress | class-ID }\n"
32 " --mtu=SIZE Overwrite MTU (default: MTU of network device)\n"
33 " --mpu=SIZE Minimum packet size on the link (default: 0).\n"
34 " --overhead=SIZE Overhead in bytes per packet (default: 0).\n"
35 " --linktype=TYPE Overwrite linktype (default: type of network device)\n"
36 "\n"
37 "CONFIGURATION\n"
38 " -h, --help Show help text of class specific options.\n"
39 "\n"
40 "EXAMPLE\n"
41 " $ nl-class-add --dev=eth1 --parent=root htb --rate=100mbit\n"
42 "\n"
43  );
44  exit(0);
45 }
46 
47 int main(int argc, char *argv[])
48 {
49  struct nl_sock *sock;
50  struct rtnl_class *class;
51  struct rtnl_tc *tc;
52  struct nl_cache *link_cache;
53  struct nl_dump_params dp = {
55  .dp_fd = stdout,
56  };
57  struct nl_cli_tc_module *tm;
58  struct rtnl_tc_ops *ops;
59  int err, flags = NLM_F_CREATE | NLM_F_EXCL;
60  char *kind, *id = NULL;
61 
62  sock = nl_cli_alloc_socket();
63  nl_cli_connect(sock, NETLINK_ROUTE);
64 
65  link_cache = nl_cli_link_alloc_cache(sock);
66 
67  class = nl_cli_class_alloc();
68  tc = (struct rtnl_tc *) class;
69 
70  for (;;) {
71  int c, optidx = 0;
72  enum {
73  ARG_UPDATE = 257,
74  ARG_UPDATE_ONLY = 258,
75  ARG_MTU,
76  ARG_MPU,
77  ARG_OVERHEAD,
78  ARG_LINKTYPE,
79  };
80  static struct option long_opts[] = {
81  { "quiet", 0, 0, 'q' },
82  { "help", 0, 0, 'h' },
83  { "version", 0, 0, 'v' },
84  { "dev", 1, 0, 'd' },
85  { "parent", 1, 0, 'p' },
86  { "id", 1, 0, 'i' },
87  { "update", 0, 0, ARG_UPDATE },
88  { "update-only", 0, 0, ARG_UPDATE_ONLY },
89  { "mtu", 1, 0, ARG_MTU },
90  { "mpu", 1, 0, ARG_MPU },
91  { "overhead", 1, 0, ARG_OVERHEAD },
92  { "linktype", 1, 0, ARG_LINKTYPE },
93  { 0, 0, 0, 0 }
94  };
95 
96  c = getopt_long(argc, argv, "+qhvd:p:i:",
97  long_opts, &optidx);
98  if (c == -1)
99  break;
100 
101  switch (c) {
102  case 'q': quiet = 1; break;
103  case 'h': print_usage(); break;
104  case 'v': nl_cli_print_version(); break;
105  case 'd': nl_cli_tc_parse_dev(tc, link_cache, optarg); break;
106  case 'p': nl_cli_tc_parse_parent(tc, optarg); break;
107  case 'i': id = strdup(optarg); break;
108  case ARG_UPDATE: flags = NLM_F_CREATE; break;
109  case ARG_UPDATE_ONLY: flags = 0; break;
110  case ARG_MTU: nl_cli_tc_parse_mtu(tc, optarg); break;
111  case ARG_MPU: nl_cli_tc_parse_mpu(tc, optarg); break;
112  case ARG_OVERHEAD: nl_cli_tc_parse_overhead(tc, optarg); break;
113  case ARG_LINKTYPE: nl_cli_tc_parse_linktype(tc, optarg); break;
114  }
115  }
116 
117  if (optind >= argc)
118  print_usage();
119 
120  if (!rtnl_tc_get_ifindex(tc))
121  nl_cli_fatal(EINVAL, "You must specify a network device (--dev=XXX)");
122 
123  if (!rtnl_tc_get_parent(tc))
124  nl_cli_fatal(EINVAL, "You must specify a parent (--parent=XXX)");
125 
126  if (id) {
127  nl_cli_tc_parse_handle(tc, id, 1);
128  free(id);
129  }
130 
131  kind = argv[optind++];
132  rtnl_tc_set_kind(tc, kind);
133 
134  if (!(ops = rtnl_tc_get_ops(tc)))
135  nl_cli_fatal(ENOENT, "Unknown class \"%s\"", kind);
136 
137  if (!(tm = nl_cli_tc_lookup(ops)))
138  nl_cli_fatal(ENOTSUP, "class type \"%s\" not supported.", kind);
139 
140  tm->tm_parse_argv(tc, argc, argv);
141 
142  if (!quiet) {
143  printf("Adding ");
144  nl_object_dump(OBJ_CAST(class), &dp);
145  }
146 
147  if ((err = rtnl_class_add(sock, class, flags)) < 0)
148  nl_cli_fatal(EINVAL, "Unable to add class: %s", nl_geterror(err));
149 
150  return 0;
151 }
int rtnl_class_add(struct nl_sock *sk, struct rtnl_class *class, int flags)
Add/Update traffic class.
Definition: class.c:165
void nl_cli_fatal(int err, const char *fmt,...)
Print error message and quit application.
Definition: utils.c:71
void nl_object_dump(struct nl_object *obj, struct nl_dump_params *params)
Dump this object according to the specified parameters.
Definition: object.c:287
uint32_t rtnl_tc_get_parent(struct rtnl_tc *tc)
Return parent identifier of a traffic control object.
Definition: tc.c:511
int rtnl_tc_set_kind(struct rtnl_tc *tc, const char *kind)
Define the type of traffic control object.
Definition: tc.c:523
int rtnl_tc_get_ifindex(struct rtnl_tc *tc)
Return interface index of traffic control object.
Definition: tc.c:287
@ NL_DUMP_DETAILS
Dump all attributes but no statistics.
Definition: types.h:17
Dumping parameters.
Definition: types.h:28
enum nl_dump_type dp_type
Specifies the type of dump that is requested.
Definition: types.h:32