nexmon – Blame information for rev 1

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1 office 1 #include <net/if.h>
2 #include <errno.h>
3 #include <string.h>
4  
5 #include <netlink/genl/genl.h>
6 #include <netlink/genl/family.h>
7 #include <netlink/genl/ctrl.h>
8 #include <netlink/msg.h>
9 #include <netlink/attr.h>
10  
11 #include "nl80211.h"
12 #include "iw.h"
13  
14 SECTION(mpath);
15  
16 enum plink_state {
17 LISTEN,
18 OPN_SNT,
19 OPN_RCVD,
20 CNF_RCVD,
21 ESTAB,
22 HOLDING,
23 BLOCKED
24 };
25  
26  
27 static int print_mpath_handler(struct nl_msg *msg, void *arg)
28 {
29 struct nlattr *tb[NL80211_ATTR_MAX + 1];
30 struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg));
31 struct nlattr *pinfo[NL80211_MPATH_INFO_MAX + 1];
32 char dst[20], next_hop[20], dev[20];
33 static struct nla_policy mpath_policy[NL80211_MPATH_INFO_MAX + 1] = {
34 [NL80211_MPATH_INFO_FRAME_QLEN] = { .type = NLA_U32 },
35 [NL80211_MPATH_INFO_SN] = { .type = NLA_U32 },
36 [NL80211_MPATH_INFO_METRIC] = { .type = NLA_U32 },
37 [NL80211_MPATH_INFO_EXPTIME] = { .type = NLA_U32 },
38 [NL80211_MPATH_INFO_DISCOVERY_TIMEOUT] = { .type = NLA_U32 },
39 [NL80211_MPATH_INFO_DISCOVERY_RETRIES] = { .type = NLA_U8 },
40 [NL80211_MPATH_INFO_FLAGS] = { .type = NLA_U8 },
41 };
42  
43 nla_parse(tb, NL80211_ATTR_MAX, genlmsg_attrdata(gnlh, 0),
44 genlmsg_attrlen(gnlh, 0), NULL);
45  
46 /*
47 * TODO: validate the interface and mac address!
48 * Otherwise, there's a race condition as soon as
49 * the kernel starts sending mpath notifications.
50 */
51  
52 if (!tb[NL80211_ATTR_MPATH_INFO]) {
53 fprintf(stderr, "mpath info missing!\n");
54 return NL_SKIP;
55 }
56 if (nla_parse_nested(pinfo, NL80211_MPATH_INFO_MAX,
57 tb[NL80211_ATTR_MPATH_INFO],
58 mpath_policy)) {
59 fprintf(stderr, "failed to parse nested attributes!\n");
60 return NL_SKIP;
61 }
62  
63 mac_addr_n2a(dst, nla_data(tb[NL80211_ATTR_MAC]));
64 mac_addr_n2a(next_hop, nla_data(tb[NL80211_ATTR_MPATH_NEXT_HOP]));
65 if_indextoname(nla_get_u32(tb[NL80211_ATTR_IFINDEX]), dev);
66 printf("%s %s %s", dst, next_hop, dev);
67 if (pinfo[NL80211_MPATH_INFO_SN])
68 printf("\t%u",
69 nla_get_u32(pinfo[NL80211_MPATH_INFO_SN]));
70 if (pinfo[NL80211_MPATH_INFO_METRIC])
71 printf("\t%u",
72 nla_get_u32(pinfo[NL80211_MPATH_INFO_METRIC]));
73 if (pinfo[NL80211_MPATH_INFO_FRAME_QLEN])
74 printf("\t%u",
75 nla_get_u32(pinfo[NL80211_MPATH_INFO_FRAME_QLEN]));
76 if (pinfo[NL80211_MPATH_INFO_EXPTIME])
77 printf("\t%u",
78 nla_get_u32(pinfo[NL80211_MPATH_INFO_EXPTIME]));
79 if (pinfo[NL80211_MPATH_INFO_DISCOVERY_TIMEOUT])
80 printf("\t%u",
81 nla_get_u32(pinfo[NL80211_MPATH_INFO_DISCOVERY_TIMEOUT]));
82 if (pinfo[NL80211_MPATH_INFO_DISCOVERY_RETRIES])
83 printf("\t%u",
84 nla_get_u8(pinfo[NL80211_MPATH_INFO_DISCOVERY_RETRIES]));
85 if (pinfo[NL80211_MPATH_INFO_FLAGS])
86 printf("\t0x%x",
87 nla_get_u8(pinfo[NL80211_MPATH_INFO_FLAGS]));
88  
89 printf("\n");
90 return NL_SKIP;
91 }
92  
93 static int handle_mpath_get(struct nl80211_state *state,
94 struct nl_cb *cb,
95 struct nl_msg *msg,
96 int argc, char **argv,
97 enum id_input id)
98 {
99 unsigned char dst[ETH_ALEN];
100  
101 if (argc < 1)
102 return 1;
103  
104 if (mac_addr_a2n(dst, argv[0])) {
105 fprintf(stderr, "invalid mac address\n");
106 return 2;
107 }
108 argc--;
109 argv++;
110  
111 if (argc)
112 return 1;
113  
114 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, dst);
115  
116 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, print_mpath_handler, NULL);
117  
118 return 0;
119 nla_put_failure:
120 return -ENOBUFS;
121 }
122 COMMAND(mpath, get, "<MAC address>",
123 NL80211_CMD_GET_MPATH, 0, CIB_NETDEV, handle_mpath_get,
124 "Get information on mesh path to the given node.");
125 COMMAND(mpath, del, "<MAC address>",
126 NL80211_CMD_DEL_MPATH, 0, CIB_NETDEV, handle_mpath_get,
127 "Remove the mesh path to the given node.");
128  
129 static int handle_mpath_set(struct nl80211_state *state,
130 struct nl_cb *cb,
131 struct nl_msg *msg,
132 int argc, char **argv,
133 enum id_input id)
134 {
135 unsigned char dst[ETH_ALEN];
136 unsigned char next_hop[ETH_ALEN];
137  
138 if (argc < 3)
139 return 1;
140  
141 if (mac_addr_a2n(dst, argv[0])) {
142 fprintf(stderr, "invalid destination mac address\n");
143 return 2;
144 }
145 argc--;
146 argv++;
147  
148 if (strcmp("next_hop", argv[0]) != 0)
149 return 1;
150 argc--;
151 argv++;
152  
153 if (mac_addr_a2n(next_hop, argv[0])) {
154 fprintf(stderr, "invalid next hop mac address\n");
155 return 2;
156 }
157 argc--;
158 argv++;
159  
160 if (argc)
161 return 1;
162  
163 NLA_PUT(msg, NL80211_ATTR_MAC, ETH_ALEN, dst);
164 NLA_PUT(msg, NL80211_ATTR_MPATH_NEXT_HOP, ETH_ALEN, next_hop);
165  
166 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, print_mpath_handler, NULL);
167 return 0;
168 nla_put_failure:
169 return -ENOBUFS;
170 }
171 COMMAND(mpath, new, "<destination MAC address> next_hop <next hop MAC address>",
172 NL80211_CMD_NEW_MPATH, 0, CIB_NETDEV, handle_mpath_set,
173 "Create a new mesh path (instead of relying on automatic discovery).");
174 COMMAND(mpath, set, "<destination MAC address> next_hop <next hop MAC address>",
175 NL80211_CMD_SET_MPATH, 0, CIB_NETDEV, handle_mpath_set,
176 "Set an existing mesh path's next hop.");
177  
178 static int handle_mpath_dump(struct nl80211_state *state,
179 struct nl_cb *cb,
180 struct nl_msg *msg,
181 int argc, char **argv,
182 enum id_input id)
183 {
184 printf("DEST ADDR NEXT HOP IFACE\tSN\tMETRIC\tQLEN\t"
185 "EXPTIME\t\tDTIM\tDRET\tFLAGS\n");
186 nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, print_mpath_handler, NULL);
187 return 0;
188 }
189 COMMAND(mpath, dump, NULL,
190 NL80211_CMD_GET_MPATH, NLM_F_DUMP, CIB_NETDEV, handle_mpath_dump,
191 "List known mesh paths.");