Marc Boucher | e6869a8 | 2000-03-20 06:03:29 +0000 | [diff] [blame] | 1 | /* Shared library add-on to iptables to add TOS target support. */ |
| 2 | #include <stdio.h> |
| 3 | #include <string.h> |
| 4 | #include <stdlib.h> |
| 5 | #include <getopt.h> |
| 6 | |
| 7 | #include <iptables.h> |
| 8 | #include <linux/netfilter_ipv4/ip_tables.h> |
| 9 | #include <linux/netfilter_ipv4/ipt_TOS.h> |
| 10 | |
| 11 | struct tosinfo { |
Yasuyuki KOZAKAI | 193df8e | 2007-07-24 05:57:28 +0000 | [diff] [blame] | 12 | struct xt_entry_target t; |
Marc Boucher | e6869a8 | 2000-03-20 06:03:29 +0000 | [diff] [blame] | 13 | struct ipt_tos_target_info tos; |
| 14 | }; |
| 15 | |
| 16 | /* TOS names and values. */ |
Jan Engelhardt | 661f112 | 2007-07-30 14:46:51 +0000 | [diff] [blame] | 17 | static const |
Marc Boucher | e6869a8 | 2000-03-20 06:03:29 +0000 | [diff] [blame] | 18 | struct TOS_value |
| 19 | { |
| 20 | unsigned char TOS; |
| 21 | const char *name; |
| 22 | } TOS_values[] = { |
| 23 | { IPTOS_LOWDELAY, "Minimize-Delay" }, |
| 24 | { IPTOS_THROUGHPUT, "Maximize-Throughput" }, |
| 25 | { IPTOS_RELIABILITY, "Maximize-Reliability" }, |
| 26 | { IPTOS_MINCOST, "Minimize-Cost" }, |
| 27 | { IPTOS_NORMALSVC, "Normal-Service" }, |
| 28 | }; |
| 29 | |
| 30 | /* Function which prints out usage message. */ |
| 31 | static void |
| 32 | help(void) |
| 33 | { |
| 34 | unsigned int i; |
Rusty Russell | 7e53bf9 | 2000-03-20 07:03:28 +0000 | [diff] [blame] | 35 | |
Marc Boucher | e6869a8 | 2000-03-20 06:03:29 +0000 | [diff] [blame] | 36 | printf( |
| 37 | "TOS target v%s options:\n" |
| 38 | " --set-tos value Set Type of Service field to one of the\n" |
| 39 | " following numeric or descriptive values:\n", |
Harald Welte | 80fe35d | 2002-05-29 13:08:15 +0000 | [diff] [blame] | 40 | IPTABLES_VERSION); |
Marc Boucher | e6869a8 | 2000-03-20 06:03:29 +0000 | [diff] [blame] | 41 | |
| 42 | for (i = 0; i < sizeof(TOS_values)/sizeof(struct TOS_value);i++) |
| 43 | printf(" %s %u (0x%02x)\n", |
| 44 | TOS_values[i].name, |
| 45 | TOS_values[i].TOS, |
| 46 | TOS_values[i].TOS); |
| 47 | fputc('\n', stdout); |
| 48 | } |
| 49 | |
Jan Engelhardt | 661f112 | 2007-07-30 14:46:51 +0000 | [diff] [blame] | 50 | static const struct option opts[] = { |
Marc Boucher | e6869a8 | 2000-03-20 06:03:29 +0000 | [diff] [blame] | 51 | { "set-tos", 1, 0, '1' }, |
| 52 | { 0 } |
| 53 | }; |
| 54 | |
| 55 | /* Initialize the target. */ |
| 56 | static void |
Peter Riley | ea146a9 | 2007-09-02 13:09:07 +0000 | [diff] [blame] | 57 | init(struct xt_entry_target *t) |
Marc Boucher | e6869a8 | 2000-03-20 06:03:29 +0000 | [diff] [blame] | 58 | { |
| 59 | } |
| 60 | |
| 61 | static void |
Harald Welte | efa8fc2 | 2005-07-19 22:03:49 +0000 | [diff] [blame] | 62 | parse_tos(const char *s, struct ipt_tos_target_info *info) |
Marc Boucher | e6869a8 | 2000-03-20 06:03:29 +0000 | [diff] [blame] | 63 | { |
Harald Welte | b471976 | 2001-07-23 02:14:22 +0000 | [diff] [blame] | 64 | unsigned int i, tos; |
Marc Boucher | e6869a8 | 2000-03-20 06:03:29 +0000 | [diff] [blame] | 65 | |
Marc Boucher | 459357f | 2001-09-08 02:16:51 +0000 | [diff] [blame] | 66 | if (string_to_number(s, 0, 255, &tos) != -1) { |
Marc Boucher | e6869a8 | 2000-03-20 06:03:29 +0000 | [diff] [blame] | 67 | if (tos == IPTOS_LOWDELAY |
| 68 | || tos == IPTOS_THROUGHPUT |
| 69 | || tos == IPTOS_RELIABILITY |
| 70 | || tos == IPTOS_MINCOST |
| 71 | || tos == IPTOS_NORMALSVC) { |
| 72 | info->tos = (u_int8_t )tos; |
| 73 | return; |
| 74 | } |
| 75 | } else { |
| 76 | for (i = 0; i<sizeof(TOS_values)/sizeof(struct TOS_value); i++) |
| 77 | if (strcasecmp(s,TOS_values[i].name) == 0) { |
| 78 | info->tos = TOS_values[i].TOS; |
| 79 | return; |
| 80 | } |
| 81 | } |
| 82 | exit_error(PARAMETER_PROBLEM, "Bad TOS value `%s'", s); |
| 83 | } |
| 84 | |
| 85 | /* Function which parses command options; returns true if it |
| 86 | ate an option */ |
| 87 | static int |
| 88 | parse(int c, char **argv, int invert, unsigned int *flags, |
Yasuyuki KOZAKAI | c0a9ab9 | 2007-07-24 06:02:05 +0000 | [diff] [blame] | 89 | const void *entry, |
Yasuyuki KOZAKAI | 193df8e | 2007-07-24 05:57:28 +0000 | [diff] [blame] | 90 | struct xt_entry_target **target) |
Marc Boucher | e6869a8 | 2000-03-20 06:03:29 +0000 | [diff] [blame] | 91 | { |
| 92 | struct ipt_tos_target_info *tosinfo |
| 93 | = (struct ipt_tos_target_info *)(*target)->data; |
| 94 | |
| 95 | switch (c) { |
| 96 | case '1': |
| 97 | if (*flags) |
| 98 | exit_error(PARAMETER_PROBLEM, |
| 99 | "TOS target: Cant specify --set-tos twice"); |
| 100 | parse_tos(optarg, tosinfo); |
| 101 | *flags = 1; |
| 102 | break; |
Rusty Russell | 7e53bf9 | 2000-03-20 07:03:28 +0000 | [diff] [blame] | 103 | |
Marc Boucher | e6869a8 | 2000-03-20 06:03:29 +0000 | [diff] [blame] | 104 | default: |
| 105 | return 0; |
| 106 | } |
| 107 | |
| 108 | return 1; |
| 109 | } |
| 110 | |
| 111 | static void |
| 112 | final_check(unsigned int flags) |
| 113 | { |
| 114 | if (!flags) |
| 115 | exit_error(PARAMETER_PROBLEM, |
| 116 | "TOS target: Parameter --set-tos is required"); |
| 117 | } |
| 118 | |
| 119 | static void |
| 120 | print_tos(u_int8_t tos, int numeric) |
| 121 | { |
| 122 | unsigned int i; |
Rusty Russell | 7e53bf9 | 2000-03-20 07:03:28 +0000 | [diff] [blame] | 123 | |
Marc Boucher | e6869a8 | 2000-03-20 06:03:29 +0000 | [diff] [blame] | 124 | if (!numeric) { |
| 125 | for (i = 0; i<sizeof(TOS_values)/sizeof(struct TOS_value); i++) |
| 126 | if (TOS_values[i].TOS == tos) { |
| 127 | printf("%s ", TOS_values[i].name); |
| 128 | return; |
| 129 | } |
| 130 | } |
| 131 | printf("0x%02x ", tos); |
| 132 | } |
| 133 | |
| 134 | /* Prints out the targinfo. */ |
| 135 | static void |
Yasuyuki KOZAKAI | c0a9ab9 | 2007-07-24 06:02:05 +0000 | [diff] [blame] | 136 | print(const void *ip, |
Yasuyuki KOZAKAI | 193df8e | 2007-07-24 05:57:28 +0000 | [diff] [blame] | 137 | const struct xt_entry_target *target, |
Marc Boucher | e6869a8 | 2000-03-20 06:03:29 +0000 | [diff] [blame] | 138 | int numeric) |
| 139 | { |
| 140 | const struct ipt_tos_target_info *tosinfo = |
| 141 | (const struct ipt_tos_target_info *)target->data; |
| 142 | printf("TOS set "); |
Rusty Russell | 7e53bf9 | 2000-03-20 07:03:28 +0000 | [diff] [blame] | 143 | print_tos(tosinfo->tos, numeric); |
Marc Boucher | e6869a8 | 2000-03-20 06:03:29 +0000 | [diff] [blame] | 144 | } |
| 145 | |
| 146 | /* Saves the union ipt_targinfo in parsable form to stdout. */ |
| 147 | static void |
Yasuyuki KOZAKAI | c0a9ab9 | 2007-07-24 06:02:05 +0000 | [diff] [blame] | 148 | save(const void *ip, const struct xt_entry_target *target) |
Marc Boucher | e6869a8 | 2000-03-20 06:03:29 +0000 | [diff] [blame] | 149 | { |
| 150 | const struct ipt_tos_target_info *tosinfo = |
| 151 | (const struct ipt_tos_target_info *)target->data; |
Rusty Russell | 7e53bf9 | 2000-03-20 07:03:28 +0000 | [diff] [blame] | 152 | |
| 153 | printf("--set-tos 0x%02x ", tosinfo->tos); |
Marc Boucher | e6869a8 | 2000-03-20 06:03:29 +0000 | [diff] [blame] | 154 | } |
| 155 | |
Pablo Neira | 8caee8b | 2004-12-28 13:11:59 +0000 | [diff] [blame] | 156 | static struct iptables_target tos = { |
Pablo Neira | 8caee8b | 2004-12-28 13:11:59 +0000 | [diff] [blame] | 157 | .name = "TOS", |
| 158 | .version = IPTABLES_VERSION, |
| 159 | .size = IPT_ALIGN(sizeof(struct ipt_tos_target_info)), |
| 160 | .userspacesize = IPT_ALIGN(sizeof(struct ipt_tos_target_info)), |
| 161 | .help = &help, |
| 162 | .init = &init, |
| 163 | .parse = &parse, |
| 164 | .final_check = &final_check, |
| 165 | .print = &print, |
| 166 | .save = &save, |
| 167 | .extra_opts = opts |
Marc Boucher | e6869a8 | 2000-03-20 06:03:29 +0000 | [diff] [blame] | 168 | }; |
| 169 | |
| 170 | void _init(void) |
| 171 | { |
| 172 | register_target(&tos); |
| 173 | } |