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."); 192
