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Commit | Line | Data |
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7e7c7372 | 1 | /* |
f3e1b244 | 2 | * p_ip.c packet editor: IPV4 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> | |
7e7c7372 | 16 | #include <fcntl.h> |
17 | #include <sys/socket.h> | |
18 | #include <netinet/in.h> | |
19 | #include <arpa/inet.h> | |
20 | #include <string.h> | |
21 | #include "utils.h" | |
22 | #include "tc_util.h" | |
23 | #include "m_pedit.h" | |
24 | ||
25 | static int | |
952f89de | 26 | parse_ip(int *argc_p, char ***argv_p, |
7c71a40c | 27 | struct m_pedit_sel *sel, struct m_pedit_key *tkey) |
7e7c7372 | 28 | { |
29 | int res = -1; | |
30 | int argc = *argc_p; | |
31 | char **argv = *argv_p; | |
32 | ||
33 | if (argc < 2) | |
34 | return -1; | |
35 | ||
7c71a40c AV |
36 | tkey->htype = sel->extended ? |
37 | TCA_PEDIT_KEY_EX_HDR_TYPE_IP4 : | |
38 | TCA_PEDIT_KEY_EX_HDR_TYPE_NETWORK; | |
39 | ||
7e7c7372 | 40 | if (strcmp(*argv, "src") == 0) { |
41 | NEXT_ARG(); | |
42 | tkey->off = 12; | |
32a121cb | 43 | res = parse_cmd(&argc, &argv, 4, TIPV4, RU32, sel, tkey); |
7e7c7372 | 44 | goto done; |
45 | } | |
46 | if (strcmp(*argv, "dst") == 0) { | |
47 | NEXT_ARG(); | |
48 | tkey->off = 16; | |
32a121cb | 49 | res = parse_cmd(&argc, &argv, 4, TIPV4, RU32, sel, tkey); |
7e7c7372 | 50 | goto done; |
51 | } | |
52 | /* jamal - look at these and make them either old or new | |
53 | ** scheme given diffserv | |
f5a398bf | 54 | ** don't forget the CE bit |
7e7c7372 | 55 | */ |
56 | if (strcmp(*argv, "tos") == 0 || matches(*argv, "dsfield") == 0) { | |
57 | NEXT_ARG(); | |
58 | tkey->off = 1; | |
952f89de | 59 | res = parse_cmd(&argc, &argv, 1, TU32, RU8, sel, tkey); |
7e7c7372 | 60 | goto done; |
61 | } | |
62 | if (strcmp(*argv, "ihl") == 0) { | |
63 | NEXT_ARG(); | |
64 | tkey->off = 0; | |
32a121cb | 65 | res = parse_cmd(&argc, &argv, 1, TU32, 0x0f, sel, tkey); |
7e7c7372 | 66 | goto done; |
67 | } | |
8d193d96 AV |
68 | if (strcmp(*argv, "ttl") == 0) { |
69 | NEXT_ARG(); | |
70 | tkey->off = 8; | |
71 | res = parse_cmd(&argc, &argv, 1, TU32, RU8, sel, tkey); | |
72 | goto done; | |
73 | } | |
7e7c7372 | 74 | if (strcmp(*argv, "protocol") == 0) { |
75 | NEXT_ARG(); | |
76 | tkey->off = 9; | |
32a121cb | 77 | res = parse_cmd(&argc, &argv, 1, TU32, RU8, sel, tkey); |
7e7c7372 | 78 | goto done; |
79 | } | |
80 | /* jamal - fix this */ | |
81 | if (matches(*argv, "precedence") == 0) { | |
82 | NEXT_ARG(); | |
83 | tkey->off = 1; | |
32a121cb | 84 | res = parse_cmd(&argc, &argv, 1, TU32, RU8, sel, tkey); |
7e7c7372 | 85 | goto done; |
86 | } | |
87 | /* jamal - validate this at some point */ | |
88 | if (strcmp(*argv, "nofrag") == 0) { | |
89 | NEXT_ARG(); | |
90 | tkey->off = 6; | |
32a121cb | 91 | res = parse_cmd(&argc, &argv, 1, TU32, 0x3F, sel, tkey); |
7e7c7372 | 92 | goto done; |
93 | } | |
94 | /* jamal - validate this at some point */ | |
95 | if (strcmp(*argv, "firstfrag") == 0) { | |
96 | NEXT_ARG(); | |
97 | tkey->off = 6; | |
32a121cb | 98 | res = parse_cmd(&argc, &argv, 1, TU32, 0x1F, sel, tkey); |
7e7c7372 | 99 | goto done; |
100 | } | |
101 | if (strcmp(*argv, "ce") == 0) { | |
102 | NEXT_ARG(); | |
103 | tkey->off = 6; | |
32a121cb | 104 | res = parse_cmd(&argc, &argv, 1, TU32, 0x80, sel, tkey); |
7e7c7372 | 105 | goto done; |
106 | } | |
107 | if (strcmp(*argv, "df") == 0) { | |
108 | NEXT_ARG(); | |
109 | tkey->off = 6; | |
32a121cb | 110 | res = parse_cmd(&argc, &argv, 1, TU32, 0x40, sel, tkey); |
7e7c7372 | 111 | goto done; |
112 | } | |
113 | if (strcmp(*argv, "mf") == 0) { | |
114 | NEXT_ARG(); | |
115 | tkey->off = 6; | |
32a121cb | 116 | res = parse_cmd(&argc, &argv, 1, TU32, 0x20, sel, tkey); |
7e7c7372 | 117 | goto done; |
118 | } | |
7c71a40c AV |
119 | |
120 | if (sel->extended) | |
121 | return -1; /* fields located outside IP header should be | |
122 | * addressed using the relevant header type in | |
123 | * extended pedit kABI | |
124 | */ | |
125 | ||
7e7c7372 | 126 | if (strcmp(*argv, "dport") == 0) { |
127 | NEXT_ARG(); | |
128 | tkey->off = 22; | |
32a121cb | 129 | res = parse_cmd(&argc, &argv, 2, TU32, RU16, sel, tkey); |
7e7c7372 | 130 | goto done; |
131 | } | |
132 | if (strcmp(*argv, "sport") == 0) { | |
133 | NEXT_ARG(); | |
134 | tkey->off = 20; | |
32a121cb | 135 | res = parse_cmd(&argc, &argv, 2, TU32, RU16, sel, tkey); |
7e7c7372 | 136 | goto done; |
137 | } | |
138 | if (strcmp(*argv, "icmp_type") == 0) { | |
139 | NEXT_ARG(); | |
140 | tkey->off = 20; | |
32a121cb | 141 | res = parse_cmd(&argc, &argv, 1, TU32, RU8, sel, tkey); |
7e7c7372 | 142 | goto done; |
143 | } | |
144 | if (strcmp(*argv, "icmp_code") == 0) { | |
145 | NEXT_ARG(); | |
146 | tkey->off = 20; | |
32a121cb | 147 | res = parse_cmd(&argc, &argv, 1, TU32, RU8, sel, tkey); |
7e7c7372 | 148 | goto done; |
149 | } | |
150 | return -1; | |
151 | ||
32a121cb | 152 | done: |
7e7c7372 | 153 | *argc_p = argc; |
154 | *argv_p = argv; | |
155 | return res; | |
156 | } | |
157 | ||
7e7c7372 | 158 | struct m_pedit_util p_pedit_ip = { |
946a135c SH |
159 | .id = "ip", |
160 | .parse_peopt = parse_ip, | |
7e7c7372 | 161 | }; |