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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."); |