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7e7c7372 | 1 | /* |
ae665a52 | 2 | * m_pedit.c packet editor: IPV4/6 header |
7e7c7372 | 3 | * |
4 | * This program is free software; you can distribute it and/or | |
5 | * modify it under the terms of the GNU General Public License | |
6 | * as published by the Free Software Foundation; either version | |
7 | * 2 of the License, or (at your option) any later version. | |
8 | * | |
ae665a52 SH |
9 | * Authors: J Hadi Salim (hadi@cyberus.ca) |
10 | * | |
7e7c7372 | 11 | */ |
12 | ||
13 | #include <stdio.h> | |
14 | #include <stdlib.h> | |
15 | #include <unistd.h> | |
16 | #include <syslog.h> | |
17 | #include <fcntl.h> | |
18 | #include <sys/socket.h> | |
19 | #include <netinet/in.h> | |
20 | #include <arpa/inet.h> | |
21 | #include <string.h> | |
22 | #include "utils.h" | |
23 | #include "tc_util.h" | |
24 | #include "m_pedit.h" | |
25 | ||
26 | static int | |
27 | parse_ip(int *argc_p, char ***argv_p,struct tc_pedit_sel *sel,struct tc_pedit_key *tkey) | |
28 | { | |
29 | int res = -1; | |
30 | int argc = *argc_p; | |
31 | char **argv = *argv_p; | |
32 | ||
33 | if (argc < 2) | |
34 | return -1; | |
35 | ||
36 | if (strcmp(*argv, "src") == 0) { | |
37 | NEXT_ARG(); | |
38 | tkey->off = 12; | |
39 | res = parse_cmd(&argc, &argv, 4, TIPV4,RU32,sel,tkey); | |
40 | goto done; | |
41 | } | |
42 | if (strcmp(*argv, "dst") == 0) { | |
43 | NEXT_ARG(); | |
44 | tkey->off = 16; | |
45 | res = parse_cmd(&argc, &argv, 4, TIPV4,RU32,sel,tkey); | |
46 | goto done; | |
47 | } | |
48 | /* jamal - look at these and make them either old or new | |
49 | ** scheme given diffserv | |
50 | ** dont forget the CE bit | |
51 | */ | |
52 | if (strcmp(*argv, "tos") == 0 || matches(*argv, "dsfield") == 0) { | |
53 | NEXT_ARG(); | |
54 | tkey->off = 1; | |
55 | res = parse_cmd(&argc, &argv, 1, TU32,RU8,sel,tkey); | |
56 | goto done; | |
57 | } | |
58 | if (strcmp(*argv, "ihl") == 0) { | |
59 | NEXT_ARG(); | |
60 | tkey->off = 0; | |
61 | res = parse_cmd(&argc, &argv, 1, TU32,RU8,sel,tkey); | |
62 | goto done; | |
63 | } | |
64 | if (strcmp(*argv, "protocol") == 0) { | |
65 | NEXT_ARG(); | |
66 | tkey->off = 9; | |
67 | res = parse_cmd(&argc, &argv, 1, TU32,RU8,sel,tkey); | |
68 | goto done; | |
69 | } | |
70 | /* jamal - fix this */ | |
71 | if (matches(*argv, "precedence") == 0) { | |
72 | NEXT_ARG(); | |
73 | tkey->off = 1; | |
74 | res = parse_cmd(&argc, &argv, 1, TU32,RU8,sel,tkey); | |
75 | goto done; | |
76 | } | |
77 | /* jamal - validate this at some point */ | |
78 | if (strcmp(*argv, "nofrag") == 0) { | |
79 | NEXT_ARG(); | |
80 | tkey->off = 6; | |
81 | res = parse_cmd(&argc, &argv, 1, TU32,0x3F,sel,tkey); | |
82 | goto done; | |
83 | } | |
84 | /* jamal - validate this at some point */ | |
85 | if (strcmp(*argv, "firstfrag") == 0) { | |
86 | NEXT_ARG(); | |
87 | tkey->off = 6; | |
88 | res = parse_cmd(&argc, &argv, 1, TU32,0x1F,sel,tkey); | |
89 | goto done; | |
90 | } | |
91 | if (strcmp(*argv, "ce") == 0) { | |
92 | NEXT_ARG(); | |
93 | tkey->off = 6; | |
94 | res = parse_cmd(&argc, &argv, 1, TU32,0x80,sel,tkey); | |
95 | goto done; | |
96 | } | |
97 | if (strcmp(*argv, "df") == 0) { | |
98 | NEXT_ARG(); | |
99 | tkey->off = 6; | |
100 | res = parse_cmd(&argc, &argv, 1, TU32,0x40,sel,tkey); | |
101 | goto done; | |
102 | } | |
103 | if (strcmp(*argv, "mf") == 0) { | |
104 | NEXT_ARG(); | |
105 | tkey->off = 6; | |
106 | res = parse_cmd(&argc, &argv, 1, TU32,0x20,sel,tkey); | |
107 | goto done; | |
108 | } | |
109 | if (strcmp(*argv, "dport") == 0) { | |
110 | NEXT_ARG(); | |
111 | tkey->off = 22; | |
112 | res = parse_cmd(&argc, &argv, 2, TU32,RU16,sel,tkey); | |
113 | goto done; | |
114 | } | |
115 | if (strcmp(*argv, "sport") == 0) { | |
116 | NEXT_ARG(); | |
117 | tkey->off = 20; | |
118 | res = parse_cmd(&argc, &argv, 2, TU32,RU16,sel,tkey); | |
119 | goto done; | |
120 | } | |
121 | if (strcmp(*argv, "icmp_type") == 0) { | |
122 | NEXT_ARG(); | |
123 | tkey->off = 20; | |
124 | res = parse_cmd(&argc, &argv, 1, TU32,RU8,sel,tkey); | |
125 | goto done; | |
126 | } | |
127 | if (strcmp(*argv, "icmp_code") == 0) { | |
128 | NEXT_ARG(); | |
129 | tkey->off = 20; | |
130 | res = parse_cmd(&argc, &argv, 1, TU32,RU8,sel,tkey); | |
131 | goto done; | |
132 | } | |
133 | return -1; | |
134 | ||
135 | done: | |
136 | *argc_p = argc; | |
137 | *argv_p = argv; | |
138 | return res; | |
139 | } | |
140 | ||
141 | static int | |
142 | parse_ip6(int *argc_p, char ***argv_p,struct tc_pedit_sel *sel,struct tc_pedit_key *tkey) | |
143 | { | |
144 | int res = -1; | |
145 | return res; | |
146 | } | |
147 | ||
148 | struct m_pedit_util p_pedit_ip = { | |
149 | NULL, | |
150 | "ip", | |
151 | parse_ip, | |
152 | }; | |
153 | ||
154 | ||
155 | struct m_pedit_util p_pedit_ip6 = { | |
156 | NULL, | |
157 | "ip6", | |
158 | parse_ip6, | |
159 | }; |