18#include <netinet/in.h>
20#include <libmnl/libmnl.h>
21#include <linux/netfilter.h>
22#include <linux/netfilter/nfnetlink.h>
23#include <linux/netfilter/nf_tables.h>
25#include <libnftnl/trace.h>
55EXPORT_SYMBOL(nftnl_trace_alloc);
61EXPORT_SYMBOL(nftnl_trace_free);
66 xfree(t->jump_target);
73EXPORT_SYMBOL(nftnl_trace_is_set);
74bool nftnl_trace_is_set(
const struct nftnl_trace *t, uint16_t attr)
76 return t->flags & (1 << attr);
79static int nftnl_trace_parse_attr_cb(
const struct nlattr *attr,
void *data)
81 const struct nlattr **tb = data;
82 enum nft_trace_attributes type = mnl_attr_get_type(attr);
84 if (mnl_attr_type_valid(attr, NFTA_TRACE_MAX) < 0)
88 case NFTA_TRACE_UNSPEC:
89 case __NFTA_TRACE_MAX:
91 case NFTA_TRACE_VERDICT:
92 if (mnl_attr_validate(attr, MNL_TYPE_NESTED) < 0)
95 case NFTA_TRACE_IIFTYPE:
96 case NFTA_TRACE_OIFTYPE:
97 if (mnl_attr_validate(attr, MNL_TYPE_U16) < 0)
102 case NFTA_TRACE_MARK:
104 case NFTA_TRACE_POLICY:
105 case NFTA_TRACE_NFPROTO:
106 case NFTA_TRACE_TYPE:
107 if (mnl_attr_validate(attr, MNL_TYPE_U32) < 0)
110 case NFTA_TRACE_CHAIN:
111 case NFTA_TRACE_TABLE:
112 if (mnl_attr_validate(attr, MNL_TYPE_STRING) < 0)
115 case NFTA_TRACE_RULE_HANDLE:
116 if (mnl_attr_validate(attr, MNL_TYPE_U64) < 0)
119 case NFTA_TRACE_LL_HEADER:
120 case NFTA_TRACE_NETWORK_HEADER:
121 case NFTA_TRACE_TRANSPORT_HEADER:
122 if (mnl_attr_get_payload_len(attr) == 0)
133EXPORT_SYMBOL(nftnl_trace_get_data);
134const void *nftnl_trace_get_data(
const struct nftnl_trace *trace,
135 uint16_t type, uint32_t *data_len)
137 enum nftnl_trace_attr attr = type;
139 if (!(trace->flags & (1 << type)))
143 case NFTNL_TRACE_FAMILY:
144 *data_len =
sizeof(uint32_t);
145 return &trace->family;
147 *data_len =
sizeof(uint32_t);
149 case NFTNL_TRACE_IIF:
150 *data_len =
sizeof(uint32_t);
152 case NFTNL_TRACE_OIF:
153 *data_len =
sizeof(uint32_t);
155 case NFTNL_TRACE_LL_HEADER:
156 *data_len = trace->ll.len;
157 return trace->ll.data;
158 case NFTNL_TRACE_MARK:
159 *data_len =
sizeof(uint32_t);
161 case NFTNL_TRACE_NETWORK_HEADER:
162 *data_len = trace->nh.len;
163 return trace->nh.data;
164 case NFTNL_TRACE_TYPE:
165 *data_len =
sizeof(uint32_t);
167 case NFTNL_TRACE_CHAIN:
168 *data_len = strlen(trace->chain) + 1;
170 case NFTNL_TRACE_TABLE:
171 *data_len = strlen(trace->table) + 1;
173 case NFTNL_TRACE_JUMP_TARGET:
174 *data_len = strlen(trace->jump_target) + 1;
175 return trace->jump_target;
176 case NFTNL_TRACE_TRANSPORT_HEADER:
177 *data_len = trace->th.len;
178 return trace->th.data;
179 case NFTNL_TRACE_RULE_HANDLE:
180 *data_len =
sizeof(uint64_t);
181 return &trace->rule_handle;
182 case NFTNL_TRACE_VERDICT:
183 *data_len =
sizeof(uint32_t);
184 return &trace->verdict;
185 case NFTNL_TRACE_IIFTYPE:
186 *data_len =
sizeof(uint16_t);
187 return &trace->iiftype;
188 case NFTNL_TRACE_OIFTYPE:
189 *data_len =
sizeof(uint16_t);
190 return &trace->oiftype;
191 case NFTNL_TRACE_NFPROTO:
192 *data_len =
sizeof(uint32_t);
193 return &trace->nfproto;
194 case NFTNL_TRACE_POLICY:
195 *data_len =
sizeof(uint32_t);
196 return &trace->policy;
197 case __NFTNL_TRACE_MAX:
204EXPORT_SYMBOL(nftnl_trace_get_str);
205const char *nftnl_trace_get_str(
const struct nftnl_trace *trace, uint16_t type)
207 if (!nftnl_trace_is_set(trace, type))
211 case NFTNL_TRACE_CHAIN:
return trace->chain;
212 case NFTNL_TRACE_TABLE:
return trace->table;
213 case NFTNL_TRACE_JUMP_TARGET:
return trace->jump_target;
219EXPORT_SYMBOL(nftnl_trace_get_u16);
220uint16_t nftnl_trace_get_u16(
const struct nftnl_trace *trace, uint16_t type)
225 d = nftnl_trace_get_data(trace, type, &dlen);
226 if (d && dlen ==
sizeof(*d))
232EXPORT_SYMBOL(nftnl_trace_get_u32);
233uint32_t nftnl_trace_get_u32(
const struct nftnl_trace *trace, uint16_t type)
238 d = nftnl_trace_get_data(trace, type, &dlen);
239 if (d && dlen ==
sizeof(*d))
245EXPORT_SYMBOL(nftnl_trace_get_u64);
246uint64_t nftnl_trace_get_u64(
const struct nftnl_trace *trace, uint16_t type)
251 d = nftnl_trace_get_data(trace, type, &dlen);
252 if (d && dlen ==
sizeof(*d))
258static bool nftnl_trace_nlmsg_parse_hdrdata(
struct nlattr *attr,
266 len = mnl_attr_get_payload_len(attr);
268 header->data = malloc(len);
270 memcpy(header->data, mnl_attr_get_payload(attr), len);
278static int nftnl_trace_parse_verdict_cb(
const struct nlattr *attr,
void *data)
280 int type = mnl_attr_get_type(attr);
281 const struct nlattr **tb = data;
284 case NFTA_VERDICT_CODE:
285 if (mnl_attr_validate(attr, MNL_TYPE_U32) < 0)
289 case NFTA_VERDICT_CHAIN:
290 if (mnl_attr_validate(attr, MNL_TYPE_STRING) < 0)
299static int nftnl_trace_parse_verdict(
const struct nlattr *attr,
302 struct nlattr *tb[NFTA_VERDICT_MAX+1];
304 if (mnl_attr_parse_nested(attr, nftnl_trace_parse_verdict_cb, tb) < 0)
307 if (!tb[NFTA_VERDICT_CODE])
310 t->verdict = ntohl(mnl_attr_get_u32(tb[NFTA_VERDICT_CODE]));
311 t->flags |= (1 << NFTNL_TRACE_VERDICT);
313 switch (t->verdict) {
316 if (!tb[NFTA_VERDICT_CHAIN])
318 t->jump_target = strdup(mnl_attr_get_str(tb[NFTA_VERDICT_CHAIN]));
322 t->flags |= (1 << NFTNL_TRACE_JUMP_TARGET);
328EXPORT_SYMBOL(nftnl_trace_nlmsg_parse);
329int nftnl_trace_nlmsg_parse(
const struct nlmsghdr *nlh,
struct nftnl_trace *t)
331 struct nfgenmsg *nfg = mnl_nlmsg_get_payload(nlh);
332 struct nlattr *tb[NFTA_TRACE_MAX+1] = {};
334 if (mnl_attr_parse(nlh,
sizeof(*nfg), nftnl_trace_parse_attr_cb, tb) < 0)
337 if (!tb[NFTA_TRACE_ID])
340 if (!tb[NFTA_TRACE_TYPE])
343 t->family = nfg->nfgen_family;
344 t->flags |= (1 << NFTNL_TRACE_FAMILY);
346 t->type = ntohl(mnl_attr_get_u32(tb[NFTA_TRACE_TYPE]));
347 t->flags |= (1 << NFTNL_TRACE_TYPE);
349 t->id = ntohl(mnl_attr_get_u32(tb[NFTA_TRACE_ID]));
350 t->flags |= (1 << NFTNL_TRACE_ID);
352 if (tb[NFTA_TRACE_TABLE]) {
353 t->table = strdup(mnl_attr_get_str(tb[NFTA_TRACE_TABLE]));
357 t->flags |= (1 << NFTNL_TRACE_TABLE);
360 if (tb[NFTA_TRACE_CHAIN]) {
361 t->chain = strdup(mnl_attr_get_str(tb[NFTA_TRACE_CHAIN]));
365 t->flags |= (1 << NFTNL_TRACE_CHAIN);
368 if (tb[NFTA_TRACE_IIFTYPE]) {
369 t->iiftype = ntohs(mnl_attr_get_u16(tb[NFTA_TRACE_IIFTYPE]));
370 t->flags |= (1 << NFTNL_TRACE_IIFTYPE);
373 if (tb[NFTA_TRACE_IIF]) {
374 t->iif = ntohl(mnl_attr_get_u32(tb[NFTA_TRACE_IIF]));
375 t->flags |= (1 << NFTNL_TRACE_IIF);
378 if (tb[NFTA_TRACE_OIFTYPE]) {
379 t->oiftype = ntohs(mnl_attr_get_u16(tb[NFTA_TRACE_OIFTYPE]));
380 t->flags |= (1 << NFTNL_TRACE_OIFTYPE);
383 if (tb[NFTA_TRACE_OIF]) {
384 t->oif = ntohl(mnl_attr_get_u32(tb[NFTA_TRACE_OIF]));
385 t->flags |= (1 << NFTNL_TRACE_OIF);
388 if (tb[NFTA_TRACE_MARK]) {
389 t->mark = ntohl(mnl_attr_get_u32(tb[NFTA_TRACE_MARK]));
390 t->flags |= (1 << NFTNL_TRACE_MARK);
393 if (tb[NFTA_TRACE_RULE_HANDLE]) {
394 t->rule_handle = be64toh(mnl_attr_get_u64(tb[NFTA_TRACE_RULE_HANDLE]));
395 t->flags |= (1 << NFTNL_TRACE_RULE_HANDLE);
398 if (tb[NFTA_TRACE_VERDICT] &&
399 nftnl_trace_parse_verdict(tb[NFTA_TRACE_VERDICT], t) < 0)
402 if (nftnl_trace_nlmsg_parse_hdrdata(tb[NFTA_TRACE_LL_HEADER], &t->ll))
403 t->flags |= (1 << NFTNL_TRACE_LL_HEADER);
405 if (nftnl_trace_nlmsg_parse_hdrdata(tb[NFTA_TRACE_NETWORK_HEADER], &t->nh))
406 t->flags |= (1 << NFTNL_TRACE_NETWORK_HEADER);
408 if (nftnl_trace_nlmsg_parse_hdrdata(tb[NFTA_TRACE_TRANSPORT_HEADER], &t->th))
409 t->flags |= (1 << NFTNL_TRACE_TRANSPORT_HEADER);
411 if (tb[NFTA_TRACE_NFPROTO]) {
412 t->nfproto = ntohl(mnl_attr_get_u32(tb[NFTA_TRACE_NFPROTO]));
413 t->flags |= (1 << NFTNL_TRACE_NFPROTO);
416 if (tb[NFTA_TRACE_POLICY]) {
417 t->policy = ntohl(mnl_attr_get_u32(tb[NFTA_TRACE_POLICY]));
418 t->flags |= (1 << NFTNL_TRACE_POLICY);
421 if (tb[NFTA_TRACE_MARK]) {
422 t->mark = ntohl(mnl_attr_get_u32(tb[NFTA_TRACE_MARK]));
423 t->flags |= (1 << NFTNL_TRACE_MARK);