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f72a7aab AD |
1 | /* |
2 | * m_skbedit.c SKB Editing module | |
3 | * | |
4 | * Copyright (c) 2008, Intel Corporation. | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify it | |
7 | * under the terms and conditions of the GNU General Public License, | |
8 | * version 2, as published by the Free Software Foundation. | |
9 | * | |
10 | * This program is distributed in the hope it will be useful, but WITHOUT | |
11 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
12 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
13 | * more details. | |
14 | * | |
4d98ab00 SH |
15 | * You should have received a copy of the GNU General Public License |
16 | * along with this program; if not, see <http://www.gnu.org/licenses>. | |
f72a7aab AD |
17 | * |
18 | * Authors: Alexander Duyck <alexander.h.duyck@intel.com> | |
19 | * | |
20 | */ | |
21 | ||
22 | #include <stdio.h> | |
23 | #include <stdlib.h> | |
24 | #include <unistd.h> | |
25 | #include <string.h> | |
26 | #include "utils.h" | |
27 | #include "tc_util.h" | |
28 | #include <linux/tc_act/tc_skbedit.h> | |
1d1e0fd2 | 29 | #include <linux/if_packet.h> |
f72a7aab | 30 | |
1d1e0fd2 | 31 | static void explain(void) |
f72a7aab | 32 | { |
1d1e0fd2 | 33 | fprintf(stderr, "Usage: ... skbedit <[QM] [PM] [MM] [PT]>\n" |
e04dd30a | 34 | "QM = queue_mapping QUEUE_MAPPING\n" |
32a121cb SH |
35 | "PM = priority PRIORITY\n" |
36 | "MM = mark MARK\n" | |
1d1e0fd2 JHS |
37 | "PT = ptype PACKETYPE\n" |
38 | "PACKETYPE = is one of:\n" | |
39 | " host, otherhost, broadcast, multicast\n" | |
e04dd30a JHS |
40 | "QUEUE_MAPPING = device transmit queue to use\n" |
41 | "PRIORITY = classID to assign to priority field\n" | |
42 | "MARK = firewall mark to set\n"); | |
f72a7aab AD |
43 | } |
44 | ||
45 | static void | |
46 | usage(void) | |
47 | { | |
48 | explain(); | |
49 | exit(-1); | |
50 | } | |
51 | ||
52 | static int | |
53 | parse_skbedit(struct action_util *a, int *argc_p, char ***argv_p, int tca_id, | |
54 | struct nlmsghdr *n) | |
55 | { | |
f72a7aab AD |
56 | int argc = *argc_p; |
57 | char **argv = *argv_p; | |
58 | int ok = 0; | |
59 | struct rtattr *tail; | |
60 | unsigned int tmp; | |
1d1e0fd2 | 61 | __u16 queue_mapping, ptype; |
e04dd30a | 62 | __u32 flags = 0, priority, mark; |
46a65732 | 63 | struct tc_skbedit sel = { 0 }; |
f72a7aab AD |
64 | |
65 | if (matches(*argv, "skbedit") != 0) | |
66 | return -1; | |
67 | ||
68 | NEXT_ARG(); | |
69 | ||
70 | while (argc > 0) { | |
71 | if (matches(*argv, "queue_mapping") == 0) { | |
72 | flags |= SKBEDIT_F_QUEUE_MAPPING; | |
73 | NEXT_ARG(); | |
74 | if (get_unsigned(&tmp, *argv, 10) || tmp > 65535) { | |
75 | fprintf(stderr, "Illegal queue_mapping\n"); | |
76 | return -1; | |
77 | } | |
78 | queue_mapping = tmp; | |
79 | ok++; | |
80 | } else if (matches(*argv, "priority") == 0) { | |
81 | flags |= SKBEDIT_F_PRIORITY; | |
82 | NEXT_ARG(); | |
83 | if (get_tc_classid(&priority, *argv)) { | |
84 | fprintf(stderr, "Illegal priority\n"); | |
85 | return -1; | |
86 | } | |
87 | ok++; | |
e04dd30a JHS |
88 | } else if (matches(*argv, "mark") == 0) { |
89 | flags |= SKBEDIT_F_MARK; | |
90 | NEXT_ARG(); | |
e906975a | 91 | if (get_u32(&mark, *argv, 0)) { |
e04dd30a JHS |
92 | fprintf(stderr, "Illegal mark\n"); |
93 | return -1; | |
94 | } | |
95 | ok++; | |
1d1e0fd2 JHS |
96 | } else if (matches(*argv, "ptype") == 0) { |
97 | ||
98 | NEXT_ARG(); | |
99 | if (matches(*argv, "host") == 0) { | |
100 | ptype = PACKET_HOST; | |
101 | } else if (matches(*argv, "broadcast") == 0) { | |
102 | ptype = PACKET_BROADCAST; | |
103 | } else if (matches(*argv, "multicast") == 0) { | |
104 | ptype = PACKET_MULTICAST; | |
105 | } else if (matches(*argv, "otherhost") == 0) { | |
106 | ptype = PACKET_OTHERHOST; | |
107 | } else { | |
108 | fprintf(stderr, "Illegal ptype (%s)\n", | |
109 | *argv); | |
110 | return -1; | |
111 | } | |
112 | flags |= SKBEDIT_F_PTYPE; | |
113 | ok++; | |
f72a7aab AD |
114 | } else if (matches(*argv, "help") == 0) { |
115 | usage(); | |
116 | } else { | |
117 | break; | |
118 | } | |
119 | argc--; | |
120 | argv++; | |
121 | } | |
122 | ||
e67aba55 JP |
123 | parse_action_control_dflt(&argc, &argv, &sel.action, |
124 | false, TC_ACT_PIPE); | |
f72a7aab AD |
125 | |
126 | if (argc) { | |
127 | if (matches(*argv, "index") == 0) { | |
128 | NEXT_ARG(); | |
129 | if (get_u32(&sel.index, *argv, 10)) { | |
130 | fprintf(stderr, "Pedit: Illegal \"index\"\n"); | |
131 | return -1; | |
132 | } | |
133 | argc--; | |
134 | argv++; | |
135 | ok++; | |
136 | } | |
137 | } | |
138 | ||
139 | if (!ok) { | |
140 | explain(); | |
141 | return -1; | |
142 | } | |
143 | ||
144 | ||
145 | tail = NLMSG_TAIL(n); | |
146 | addattr_l(n, MAX_MSG, tca_id, NULL, 0); | |
147 | addattr_l(n, MAX_MSG, TCA_SKBEDIT_PARMS, &sel, sizeof(sel)); | |
148 | if (flags & SKBEDIT_F_QUEUE_MAPPING) | |
149 | addattr_l(n, MAX_MSG, TCA_SKBEDIT_QUEUE_MAPPING, | |
150 | &queue_mapping, sizeof(queue_mapping)); | |
151 | if (flags & SKBEDIT_F_PRIORITY) | |
152 | addattr_l(n, MAX_MSG, TCA_SKBEDIT_PRIORITY, | |
153 | &priority, sizeof(priority)); | |
e04dd30a JHS |
154 | if (flags & SKBEDIT_F_MARK) |
155 | addattr_l(n, MAX_MSG, TCA_SKBEDIT_MARK, | |
156 | &mark, sizeof(mark)); | |
1d1e0fd2 JHS |
157 | if (flags & SKBEDIT_F_PTYPE) |
158 | addattr_l(n, MAX_MSG, TCA_SKBEDIT_PTYPE, | |
159 | &ptype, sizeof(ptype)); | |
f72a7aab AD |
160 | tail->rta_len = (char *)NLMSG_TAIL(n) - (char *)tail; |
161 | ||
162 | *argc_p = argc; | |
163 | *argv_p = argv; | |
164 | return 0; | |
165 | } | |
166 | ||
167 | static int print_skbedit(struct action_util *au, FILE *f, struct rtattr *arg) | |
168 | { | |
f72a7aab | 169 | struct rtattr *tb[TCA_SKBEDIT_MAX + 1]; |
32a121cb | 170 | |
f72a7aab AD |
171 | SPRINT_BUF(b1); |
172 | __u32 *priority; | |
e04dd30a | 173 | __u32 *mark; |
1d1e0fd2 | 174 | __u16 *queue_mapping, *ptype; |
02b1d345 | 175 | struct tc_skbedit *p = NULL; |
f72a7aab AD |
176 | |
177 | if (arg == NULL) | |
178 | return -1; | |
179 | ||
180 | parse_rtattr_nested(tb, TCA_SKBEDIT_MAX, arg); | |
181 | ||
182 | if (tb[TCA_SKBEDIT_PARMS] == NULL) { | |
183 | fprintf(f, "[NULL skbedit parameters]"); | |
184 | return -1; | |
185 | } | |
02b1d345 | 186 | p = RTA_DATA(tb[TCA_SKBEDIT_PARMS]); |
f72a7aab | 187 | |
f72a7aab AD |
188 | fprintf(f, " skbedit"); |
189 | ||
190 | if (tb[TCA_SKBEDIT_QUEUE_MAPPING] != NULL) { | |
191 | queue_mapping = RTA_DATA(tb[TCA_SKBEDIT_QUEUE_MAPPING]); | |
192 | fprintf(f, " queue_mapping %u", *queue_mapping); | |
193 | } | |
194 | if (tb[TCA_SKBEDIT_PRIORITY] != NULL) { | |
195 | priority = RTA_DATA(tb[TCA_SKBEDIT_PRIORITY]); | |
196 | fprintf(f, " priority %s", sprint_tc_classid(*priority, b1)); | |
197 | } | |
e04dd30a JHS |
198 | if (tb[TCA_SKBEDIT_MARK] != NULL) { |
199 | mark = RTA_DATA(tb[TCA_SKBEDIT_MARK]); | |
200 | fprintf(f, " mark %d", *mark); | |
201 | } | |
1d1e0fd2 JHS |
202 | if (tb[TCA_SKBEDIT_PTYPE] != NULL) { |
203 | ptype = RTA_DATA(tb[TCA_SKBEDIT_PTYPE]); | |
204 | if (*ptype == PACKET_HOST) | |
205 | fprintf(f, " ptype host"); | |
206 | else if (*ptype == PACKET_BROADCAST) | |
207 | fprintf(f, " ptype broadcast"); | |
208 | else if (*ptype == PACKET_MULTICAST) | |
209 | fprintf(f, " ptype multicast"); | |
210 | else if (*ptype == PACKET_OTHERHOST) | |
211 | fprintf(f, " ptype otherhost"); | |
212 | else | |
213 | fprintf(f, " ptype %d", *ptype); | |
214 | } | |
f72a7aab | 215 | |
e67aba55 | 216 | print_action_control(f, " ", p->action, ""); |
878babff | 217 | |
53075318 | 218 | fprintf(f, "\n\t index %u ref %d bind %d", |
1d1e0fd2 | 219 | p->index, p->refcnt, p->bindcnt); |
02b1d345 | 220 | |
f72a7aab AD |
221 | if (show_stats) { |
222 | if (tb[TCA_SKBEDIT_TM]) { | |
223 | struct tcf_t *tm = RTA_DATA(tb[TCA_SKBEDIT_TM]); | |
32a121cb | 224 | |
f72a7aab AD |
225 | print_tm(f, tm); |
226 | } | |
227 | } | |
228 | ||
02b1d345 JHS |
229 | fprintf(f, "\n "); |
230 | ||
f72a7aab AD |
231 | return 0; |
232 | } | |
233 | ||
234 | struct action_util skbedit_action_util = { | |
235 | .id = "skbedit", | |
236 | .parse_aopt = parse_skbedit, | |
237 | .print_aopt = print_skbedit, | |
238 | }; |