1
2
3
4
5#include <stdio.h>
6
7#include <rte_common.h>
8#include <rte_flow.h>
9#include <rte_ip.h>
10
11#include "flow.h"
12#include "ipsec-secgw.h"
13#include "parser.h"
14
15#define FLOW_RULES_MAX 128
16
17struct flow_rule_entry {
18 uint8_t is_ipv4;
19 RTE_STD_C11
20 union {
21 struct {
22 struct rte_flow_item_ipv4 spec;
23 struct rte_flow_item_ipv4 mask;
24 } ipv4;
25 struct {
26 struct rte_flow_item_ipv6 spec;
27 struct rte_flow_item_ipv6 mask;
28 } ipv6;
29 };
30 uint16_t port;
31 uint16_t queue;
32 struct rte_flow *flow;
33} flow_rule_tbl[FLOW_RULES_MAX];
34
35int nb_flow_rule;
36
37static void
38ipv4_hdr_print(struct rte_ipv4_hdr *hdr)
39{
40 char a, b, c, d;
41
42 uint32_t_to_char(rte_bswap32(hdr->src_addr), &a, &b, &c, &d);
43 printf("src: %3hhu.%3hhu.%3hhu.%3hhu \t", a, b, c, d);
44
45 uint32_t_to_char(rte_bswap32(hdr->dst_addr), &a, &b, &c, &d);
46 printf("dst: %3hhu.%3hhu.%3hhu.%3hhu", a, b, c, d);
47}
48
49static int
50ipv4_addr_cpy(rte_be32_t *spec, rte_be32_t *mask, char *token,
51 struct parse_status *status)
52{
53 struct in_addr ip;
54 uint32_t depth;
55
56 APP_CHECK(parse_ipv4_addr(token, &ip, &depth) == 0, status,
57 "unrecognized input \"%s\", expect valid ipv4 addr", token);
58 if (status->status < 0)
59 return -1;
60
61 if (depth > 32)
62 return -1;
63
64 memcpy(mask, &rte_flow_item_ipv4_mask.hdr.src_addr, sizeof(ip));
65
66 *spec = ip.s_addr;
67 if (depth < 32)
68 *mask = *mask << (32-depth);
69
70 return 0;
71}
72
73static void
74ipv6_hdr_print(struct rte_ipv6_hdr *hdr)
75{
76 uint8_t *addr;
77
78 addr = hdr->src_addr;
79 printf("src: %4hx:%4hx:%4hx:%4hx:%4hx:%4hx:%4hx:%4hx \t",
80 (uint16_t)((addr[0] << 8) | addr[1]),
81 (uint16_t)((addr[2] << 8) | addr[3]),
82 (uint16_t)((addr[4] << 8) | addr[5]),
83 (uint16_t)((addr[6] << 8) | addr[7]),
84 (uint16_t)((addr[8] << 8) | addr[9]),
85 (uint16_t)((addr[10] << 8) | addr[11]),
86 (uint16_t)((addr[12] << 8) | addr[13]),
87 (uint16_t)((addr[14] << 8) | addr[15]));
88
89 addr = hdr->dst_addr;
90 printf("dst: %4hx:%4hx:%4hx:%4hx:%4hx:%4hx:%4hx:%4hx",
91 (uint16_t)((addr[0] << 8) | addr[1]),
92 (uint16_t)((addr[2] << 8) | addr[3]),
93 (uint16_t)((addr[4] << 8) | addr[5]),
94 (uint16_t)((addr[6] << 8) | addr[7]),
95 (uint16_t)((addr[8] << 8) | addr[9]),
96 (uint16_t)((addr[10] << 8) | addr[11]),
97 (uint16_t)((addr[12] << 8) | addr[13]),
98 (uint16_t)((addr[14] << 8) | addr[15]));
99}
100
101static int
102ipv6_addr_cpy(uint8_t *spec, uint8_t *mask, char *token,
103 struct parse_status *status)
104{
105 struct in6_addr ip;
106 uint32_t depth, i;
107
108 APP_CHECK(parse_ipv6_addr(token, &ip, &depth) == 0, status,
109 "unrecognized input \"%s\", expect valid ipv6 address", token);
110 if (status->status < 0)
111 return -1;
112
113 memcpy(mask, &rte_flow_item_ipv6_mask.hdr.src_addr, sizeof(ip));
114 memcpy(spec, ip.s6_addr, sizeof(struct in6_addr));
115
116 for (i = 0; i < depth && (i%8 <= sizeof(struct in6_addr)); i++)
117 mask[i/8] &= ~(1 << (7-i%8));
118
119 return 0;
120}
121
122void
123parse_flow_tokens(char **tokens, uint32_t n_tokens,
124 struct parse_status *status)
125{
126 struct flow_rule_entry *rule;
127 uint32_t ti;
128
129 if (nb_flow_rule >= FLOW_RULES_MAX) {
130 printf("Too many flow rules\n");
131 return;
132 }
133
134 rule = &flow_rule_tbl[nb_flow_rule];
135 memset(rule, 0, sizeof(*rule));
136
137 if (strcmp(tokens[0], "ipv4") == 0) {
138 rule->is_ipv4 = 1;
139 } else if (strcmp(tokens[0], "ipv6") == 0) {
140 rule->is_ipv4 = 0;
141 } else {
142 APP_CHECK(0, status, "unrecognized input \"%s\"", tokens[0]);
143 return;
144 }
145
146 for (ti = 1; ti < n_tokens; ti++) {
147 if (strcmp(tokens[ti], "src") == 0) {
148 INCREMENT_TOKEN_INDEX(ti, n_tokens, status);
149 if (status->status < 0)
150 return;
151
152 if (rule->is_ipv4) {
153 if (ipv4_addr_cpy(&rule->ipv4.spec.hdr.src_addr,
154 &rule->ipv4.mask.hdr.src_addr,
155 tokens[ti], status))
156 return;
157 } else {
158 if (ipv6_addr_cpy(rule->ipv6.spec.hdr.src_addr,
159 rule->ipv6.mask.hdr.src_addr,
160 tokens[ti], status))
161 return;
162 }
163 }
164 if (strcmp(tokens[ti], "dst") == 0) {
165 INCREMENT_TOKEN_INDEX(ti, n_tokens, status);
166 if (status->status < 0)
167 return;
168
169 if (rule->is_ipv4) {
170 if (ipv4_addr_cpy(&rule->ipv4.spec.hdr.dst_addr,
171 &rule->ipv4.mask.hdr.dst_addr,
172 tokens[ti], status))
173 return;
174 } else {
175 if (ipv6_addr_cpy(rule->ipv6.spec.hdr.dst_addr,
176 rule->ipv6.mask.hdr.dst_addr,
177 tokens[ti], status))
178 return;
179 }
180 }
181
182 if (strcmp(tokens[ti], "port") == 0) {
183 INCREMENT_TOKEN_INDEX(ti, n_tokens, status);
184 if (status->status < 0)
185 return;
186 APP_CHECK_TOKEN_IS_NUM(tokens, ti, status);
187 if (status->status < 0)
188 return;
189
190 rule->port = atoi(tokens[ti]);
191 }
192
193 if (strcmp(tokens[ti], "queue") == 0) {
194 INCREMENT_TOKEN_INDEX(ti, n_tokens, status);
195 if (status->status < 0)
196 return;
197 APP_CHECK_TOKEN_IS_NUM(tokens, ti, status);
198 if (status->status < 0)
199 return;
200
201 rule->queue = atoi(tokens[ti]);
202 }
203 }
204
205 nb_flow_rule++;
206}
207
208#define MAX_RTE_FLOW_PATTERN (3)
209#define MAX_RTE_FLOW_ACTIONS (2)
210
211static void
212flow_init_single(struct flow_rule_entry *rule)
213{
214 struct rte_flow_item pattern[MAX_RTE_FLOW_PATTERN] = {};
215 struct rte_flow_action action[MAX_RTE_FLOW_ACTIONS] = {};
216 struct rte_flow_attr attr = {};
217 struct rte_flow_error err;
218 int ret;
219
220 attr.egress = 0;
221 attr.ingress = 1;
222
223 action[0].type = RTE_FLOW_ACTION_TYPE_QUEUE;
224 action[0].conf = &(struct rte_flow_action_queue) {
225 .index = rule->queue,
226 };
227 action[1].type = RTE_FLOW_ACTION_TYPE_END;
228
229 pattern[0].type = RTE_FLOW_ITEM_TYPE_ETH;
230
231 if (rule->is_ipv4) {
232 pattern[1].type = RTE_FLOW_ITEM_TYPE_IPV4;
233 pattern[1].spec = &rule->ipv4.spec;
234 pattern[1].mask = &rule->ipv4.mask;
235 } else {
236 pattern[1].type = RTE_FLOW_ITEM_TYPE_IPV6;
237 pattern[1].spec = &rule->ipv6.spec;
238 pattern[1].mask = &rule->ipv6.mask;
239 }
240
241 pattern[2].type = RTE_FLOW_ITEM_TYPE_END;
242
243 ret = rte_flow_validate(rule->port, &attr, pattern, action, &err);
244 if (ret < 0) {
245 RTE_LOG(ERR, IPSEC, "Flow validation failed %s\n", err.message);
246 return;
247 }
248
249 rule->flow = rte_flow_create(rule->port, &attr, pattern, action, &err);
250 if (rule->flow == NULL)
251 RTE_LOG(ERR, IPSEC, "Flow creation return %s\n", err.message);
252}
253
254void
255flow_init(void)
256{
257 struct flow_rule_entry *rule;
258 int i;
259
260 for (i = 0; i < nb_flow_rule; i++) {
261 rule = &flow_rule_tbl[i];
262 flow_init_single(rule);
263 }
264
265 for (i = 0; i < nb_flow_rule; i++) {
266 rule = &flow_rule_tbl[i];
267 if (rule->is_ipv4) {
268 printf("Flow #%3d: spec ipv4 ", i);
269 ipv4_hdr_print(&rule->ipv4.spec.hdr);
270 printf("\n");
271 printf(" mask ipv4 ");
272 ipv4_hdr_print(&rule->ipv4.mask.hdr);
273 } else {
274 printf("Flow #%3d: spec ipv6 ", i);
275 ipv6_hdr_print(&rule->ipv6.spec.hdr);
276 printf("\n");
277 printf(" mask ipv6 ");
278 ipv6_hdr_print(&rule->ipv6.mask.hdr);
279 }
280
281 printf("\tPort: %d, Queue: %d", rule->port, rule->queue);
282
283 if (rule->flow == NULL)
284 printf(" [UNSUPPORTED]");
285 printf("\n");
286 }
287}
288
