00001
00002
00003
00004
00005
00006
00007
00008
00009
00010
00011
00012
00013
00014
00015
00016
00017
00018
00019 #include <netlink-local.h>
00020 #include <netlink-tc.h>
00021 #include <netlink/netlink.h>
00022 #include <netlink/route/cls/ematch.h>
00023 #include <netlink/route/cls/ematch/meta.h>
00024
00025 struct rtnl_meta_value
00026 {
00027 uint8_t mv_type;
00028 uint8_t mv_shift;
00029 uint16_t mv_id;
00030 size_t mv_len;
00031 };
00032
00033 struct meta_data
00034 {
00035 struct rtnl_meta_value * left;
00036 struct rtnl_meta_value * right;
00037 uint8_t opnd;
00038 };
00039
00040 static struct rtnl_meta_value *meta_alloc(uint8_t type, uint16_t id,
00041 uint8_t shift, void *data,
00042 size_t len)
00043 {
00044 struct rtnl_meta_value *value;
00045
00046 if (!(value = calloc(1, sizeof(*value) + len)))
00047 return NULL;
00048
00049 value->mv_type = type;
00050 value->mv_id = id;
00051 value->mv_shift = shift;
00052 value->mv_len = len;
00053
00054 memcpy(value + 1, data, len);
00055
00056 return value;
00057 }
00058
00059 struct rtnl_meta_value *rtnl_meta_value_alloc_int(uint64_t value)
00060 {
00061 return meta_alloc(TCF_META_TYPE_INT, TCF_META_ID_VALUE, 0, &value, 8);
00062 }
00063
00064 struct rtnl_meta_value *rtnl_meta_value_alloc_var(void *data, size_t len)
00065 {
00066 return meta_alloc(TCF_META_TYPE_VAR, TCF_META_ID_VALUE, 0, data, len);
00067 }
00068
00069 struct rtnl_meta_value *rtnl_meta_value_alloc_id(uint8_t type, uint16_t id,
00070 uint8_t shift, uint64_t mask)
00071 {
00072 size_t masklen = 0;
00073
00074 if (id > TCF_META_ID_MAX)
00075 return NULL;
00076
00077 if (mask) {
00078 if (type == TCF_META_TYPE_VAR)
00079 return NULL;
00080
00081 masklen = 8;
00082 }
00083
00084 return meta_alloc(type, id, shift, &mask, masklen);
00085 }
00086
00087 void rtnl_meta_value_put(struct rtnl_meta_value *mv)
00088 {
00089 free(mv);
00090 }
00091
00092 void rtnl_ematch_meta_set_lvalue(struct rtnl_ematch *e, struct rtnl_meta_value *v)
00093 {
00094 struct meta_data *m = rtnl_ematch_data(e);
00095 m->left = v;
00096 }
00097
00098 void rtnl_ematch_meta_set_rvalue(struct rtnl_ematch *e, struct rtnl_meta_value *v)
00099 {
00100 struct meta_data *m = rtnl_ematch_data(e);
00101 m->right = v;
00102 }
00103
00104 void rtnl_ematch_meta_set_operand(struct rtnl_ematch *e, uint8_t opnd)
00105 {
00106 struct meta_data *m = rtnl_ematch_data(e);
00107 m->opnd = opnd;
00108 }
00109
00110 static struct nla_policy meta_policy[TCA_EM_META_MAX+1] = {
00111 [TCA_EM_META_HDR] = { .minlen = sizeof(struct tcf_meta_hdr) },
00112 [TCA_EM_META_LVALUE] = { .minlen = 1, },
00113 [TCA_EM_META_RVALUE] = { .minlen = 1, },
00114 };
00115
00116 static int meta_parse(struct rtnl_ematch *e, void *data, size_t len)
00117 {
00118 struct meta_data *m = rtnl_ematch_data(e);
00119 struct nlattr *tb[TCA_EM_META_MAX+1];
00120 struct rtnl_meta_value *v;
00121 struct tcf_meta_hdr *hdr;
00122 void *vdata = NULL;
00123 size_t vlen = 0;
00124 int err;
00125
00126 if ((err = nla_parse(tb, TCA_EM_META_MAX, data, len, meta_policy)) < 0)
00127 return err;
00128
00129 if (!tb[TCA_EM_META_HDR])
00130 return -NLE_MISSING_ATTR;
00131
00132 hdr = nla_data(tb[TCA_EM_META_HDR]);
00133
00134 if (tb[TCA_EM_META_LVALUE]) {
00135 vdata = nla_data(tb[TCA_EM_META_LVALUE]);
00136 vlen = nla_len(tb[TCA_EM_META_LVALUE]);
00137 }
00138
00139 v = meta_alloc(TCF_META_TYPE(hdr->left.kind),
00140 TCF_META_ID(hdr->left.kind),
00141 hdr->left.shift, vdata, vlen);
00142 if (!v)
00143 return -NLE_NOMEM;
00144
00145 m->left = v;
00146
00147 vlen = 0;
00148 if (tb[TCA_EM_META_RVALUE]) {
00149 vdata = nla_data(tb[TCA_EM_META_RVALUE]);
00150 vlen = nla_len(tb[TCA_EM_META_RVALUE]);
00151 }
00152
00153 v = meta_alloc(TCF_META_TYPE(hdr->right.kind),
00154 TCF_META_ID(hdr->right.kind),
00155 hdr->right.shift, vdata, vlen);
00156 if (!v) {
00157 rtnl_meta_value_put(m->left);
00158 return -NLE_NOMEM;
00159 }
00160
00161 m->right = v;
00162 m->opnd = hdr->left.op;
00163
00164 return 0;
00165 }
00166
00167 static const struct trans_tbl meta_int[] = {
00168 __ADD(TCF_META_ID_RANDOM, random)
00169 __ADD(TCF_META_ID_LOADAVG_0, loadavg_0)
00170 __ADD(TCF_META_ID_LOADAVG_1, loadavg_1)
00171 __ADD(TCF_META_ID_LOADAVG_2, loadavg_2)
00172 __ADD(TCF_META_ID_DEV, dev)
00173 __ADD(TCF_META_ID_PRIORITY, prio)
00174 __ADD(TCF_META_ID_PROTOCOL, proto)
00175 __ADD(TCF_META_ID_PKTTYPE, pkttype)
00176 __ADD(TCF_META_ID_PKTLEN, pktlen)
00177 __ADD(TCF_META_ID_DATALEN, datalen)
00178 __ADD(TCF_META_ID_MACLEN, maclen)
00179 __ADD(TCF_META_ID_NFMARK, mark)
00180 __ADD(TCF_META_ID_TCINDEX, tcindex)
00181 __ADD(TCF_META_ID_RTCLASSID, rtclassid)
00182 __ADD(TCF_META_ID_RTIIF, rtiif)
00183 __ADD(TCF_META_ID_SK_FAMILY, sk_family)
00184 __ADD(TCF_META_ID_SK_STATE, sk_state)
00185 __ADD(TCF_META_ID_SK_REUSE, sk_reuse)
00186 __ADD(TCF_META_ID_SK_REFCNT, sk_refcnt)
00187 __ADD(TCF_META_ID_SK_RCVBUF, sk_rcvbuf)
00188 __ADD(TCF_META_ID_SK_SNDBUF, sk_sndbuf)
00189 __ADD(TCF_META_ID_SK_SHUTDOWN, sk_sutdown)
00190 __ADD(TCF_META_ID_SK_PROTO, sk_proto)
00191 __ADD(TCF_META_ID_SK_TYPE, sk_type)
00192 __ADD(TCF_META_ID_SK_RMEM_ALLOC, sk_rmem_alloc)
00193 __ADD(TCF_META_ID_SK_WMEM_ALLOC, sk_wmem_alloc)
00194 __ADD(TCF_META_ID_SK_WMEM_QUEUED, sk_wmem_queued)
00195 __ADD(TCF_META_ID_SK_RCV_QLEN, sk_rcv_qlen)
00196 __ADD(TCF_META_ID_SK_SND_QLEN, sk_snd_qlen)
00197 __ADD(TCF_META_ID_SK_ERR_QLEN, sk_err_qlen)
00198 __ADD(TCF_META_ID_SK_FORWARD_ALLOCS, sk_forward_allocs)
00199 __ADD(TCF_META_ID_SK_ALLOCS, sk_allocs)
00200 __ADD(TCF_META_ID_SK_ROUTE_CAPS, sk_route_caps)
00201 __ADD(TCF_META_ID_SK_HASH, sk_hash)
00202 __ADD(TCF_META_ID_SK_LINGERTIME, sk_lingertime)
00203 __ADD(TCF_META_ID_SK_ACK_BACKLOG, sk_ack_backlog)
00204 __ADD(TCF_META_ID_SK_MAX_ACK_BACKLOG, sk_max_ack_backlog)
00205 __ADD(TCF_META_ID_SK_PRIO, sk_prio)
00206 __ADD(TCF_META_ID_SK_RCVLOWAT, sk_rcvlowat)
00207 __ADD(TCF_META_ID_SK_RCVTIMEO, sk_rcvtimeo)
00208 __ADD(TCF_META_ID_SK_SNDTIMEO, sk_sndtimeo)
00209 __ADD(TCF_META_ID_SK_SENDMSG_OFF, sk_sendmsg_off)
00210 __ADD(TCF_META_ID_SK_WRITE_PENDING, sk_write_pending)
00211 __ADD(TCF_META_ID_VLAN_TAG, vlan)
00212 __ADD(TCF_META_ID_RXHASH, rxhash)
00213 };
00214
00215 static char *int_id2str(int id, char *buf, size_t size)
00216 {
00217 return __type2str(id, buf, size, meta_int, ARRAY_SIZE(meta_int));
00218 }
00219
00220 static const struct trans_tbl meta_var[] = {
00221 __ADD(TCF_META_ID_DEV,devname)
00222 __ADD(TCF_META_ID_SK_BOUND_IF,sk_bound_if)
00223 };
00224
00225 static char *var_id2str(int id, char *buf, size_t size)
00226 {
00227 return __type2str(id, buf, size, meta_var, ARRAY_SIZE(meta_var));
00228 }
00229
00230 static void dump_value(struct rtnl_meta_value *v, struct nl_dump_params *p)
00231 {
00232 char buf[32];
00233
00234 switch (v->mv_type) {
00235 case TCF_META_TYPE_INT:
00236 if (v->mv_id == TCF_META_ID_VALUE) {
00237 nl_dump(p, "%u",
00238 *(uint32_t *) (v + 1));
00239 } else {
00240 nl_dump(p, "%s",
00241 int_id2str(v->mv_id, buf, sizeof(buf)));
00242
00243 if (v->mv_shift)
00244 nl_dump(p, " >> %u", v->mv_shift);
00245
00246 if (v->mv_len == 4)
00247 nl_dump(p, " & %#x", *(uint32_t *) (v + 1));
00248 else if (v->mv_len == 8)
00249 nl_dump(p, " & %#x", *(uint64_t *) (v + 1));
00250 }
00251 break;
00252
00253 case TCF_META_TYPE_VAR:
00254 if (v->mv_id == TCF_META_ID_VALUE) {
00255 nl_dump(p, "%s", (char *) (v + 1));
00256 } else {
00257 nl_dump(p, "%s",
00258 var_id2str(v->mv_id, buf, sizeof(buf)));
00259
00260 if (v->mv_shift)
00261 nl_dump(p, " >> %u", v->mv_shift);
00262 }
00263 break;
00264 }
00265 }
00266
00267 static void meta_dump(struct rtnl_ematch *e, struct nl_dump_params *p)
00268 {
00269 struct meta_data *m = rtnl_ematch_data(e);
00270 char buf[32];
00271
00272 nl_dump(p, "meta(");
00273 dump_value(m->left, p);
00274
00275 nl_dump(p, " %s ", rtnl_ematch_opnd2txt(m->opnd, buf, sizeof(buf)));
00276
00277 dump_value(m->right, p);
00278 nl_dump(p, ")");
00279 }
00280
00281 static int meta_fill(struct rtnl_ematch *e, struct nl_msg *msg)
00282 {
00283 struct meta_data *m = rtnl_ematch_data(e);
00284 struct tcf_meta_hdr hdr;
00285
00286 if (!(m->left && m->right))
00287 return -NLE_MISSING_ATTR;
00288
00289 memset(&hdr, 0, sizeof(hdr));
00290 hdr.left.kind = (m->left->mv_type << 12) & TCF_META_TYPE_MASK;
00291 hdr.left.kind |= m->left->mv_id & TCF_META_ID_MASK;
00292 hdr.left.shift = m->left->mv_shift;
00293 hdr.left.op = m->opnd;
00294 hdr.right.kind = (m->right->mv_type << 12) & TCF_META_TYPE_MASK;
00295 hdr.right.kind |= m->right->mv_id & TCF_META_ID_MASK;
00296
00297 NLA_PUT(msg, TCA_EM_META_HDR, sizeof(hdr), &hdr);
00298
00299 if (m->left->mv_len)
00300 NLA_PUT(msg, TCA_EM_META_LVALUE, m->left->mv_len, (m->left + 1));
00301
00302 if (m->right->mv_len)
00303 NLA_PUT(msg, TCA_EM_META_RVALUE, m->right->mv_len, (m->right + 1));
00304
00305 return 0;
00306
00307 nla_put_failure:
00308 return -NLE_NOMEM;
00309 }
00310
00311 static void meta_free(struct rtnl_ematch *e)
00312 {
00313 struct meta_data *m = rtnl_ematch_data(e);
00314 free(m->left);
00315 free(m->right);
00316 }
00317
00318 static struct rtnl_ematch_ops meta_ops = {
00319 .eo_kind = TCF_EM_META,
00320 .eo_name = "meta",
00321 .eo_minlen = sizeof(struct tcf_meta_hdr),
00322 .eo_datalen = sizeof(struct meta_data),
00323 .eo_parse = meta_parse,
00324 .eo_dump = meta_dump,
00325 .eo_fill = meta_fill,
00326 .eo_free = meta_free,
00327 };
00328
00329 static void __init meta_init(void)
00330 {
00331 rtnl_ematch_register(&meta_ops);
00332 }
00333
00334