Harald Welte | 0e81d5d | 2002-02-25 11:26:01 +0000 | [diff] [blame] | 1 | /* Shared library add-on to iptables to add CONNMARK 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_CONNMARK.h> |
| 10 | |
| 11 | #if 0 |
| 12 | struct markinfo { |
| 13 | struct ipt_entry_target t; |
| 14 | struct ipt_connmark_target_info mark; |
| 15 | }; |
| 16 | #endif |
| 17 | |
| 18 | /* Function which prints out usage message. */ |
| 19 | static void |
| 20 | help(void) |
| 21 | { |
| 22 | printf( |
| 23 | "CONNMARK target v%s options:\n" |
| 24 | " --set-mark value Set conntrack mark value\n" |
| 25 | " --save-mark Save the packet nfmark on the connection\n" |
| 26 | " --restore-mark Restore saved nfmark value\n" |
| 27 | "\n", |
Harald Welte | 80fe35d | 2002-05-29 13:08:15 +0000 | [diff] [blame] | 28 | IPTABLES_VERSION); |
Harald Welte | 0e81d5d | 2002-02-25 11:26:01 +0000 | [diff] [blame] | 29 | } |
| 30 | |
| 31 | static struct option opts[] = { |
| 32 | { "set-mark", 1, 0, '1' }, |
| 33 | { "save-mark", 0, 0, '2' }, |
| 34 | { "restore-mark", 0, 0, '3' }, |
| 35 | { 0 } |
| 36 | }; |
| 37 | |
| 38 | /* Initialize the target. */ |
| 39 | static void |
| 40 | init(struct ipt_entry_target *t, unsigned int *nfcache) |
| 41 | { |
| 42 | } |
| 43 | |
| 44 | /* Function which parses command options; returns true if it |
| 45 | ate an option */ |
| 46 | static int |
| 47 | parse(int c, char **argv, int invert, unsigned int *flags, |
| 48 | const struct ipt_entry *entry, |
| 49 | struct ipt_entry_target **target) |
| 50 | { |
| 51 | struct ipt_connmark_target_info *markinfo |
| 52 | = (struct ipt_connmark_target_info *)(*target)->data; |
| 53 | |
| 54 | switch (c) { |
| 55 | char *end; |
| 56 | case '1': |
| 57 | markinfo->mode = IPT_CONNMARK_SET; |
| 58 | markinfo->mark = strtoul(optarg, &end, 0); |
| 59 | if (*end != '\0' || end == optarg) |
| 60 | exit_error(PARAMETER_PROBLEM, "Bad MARK value `%s'", optarg); |
| 61 | if (*flags) |
| 62 | exit_error(PARAMETER_PROBLEM, |
| 63 | "CONNMARK target: Can't specify --set-mark twice"); |
| 64 | *flags = 1; |
| 65 | break; |
| 66 | case '2': |
| 67 | markinfo->mode = IPT_CONNMARK_SAVE; |
| 68 | if (*flags) |
| 69 | exit_error(PARAMETER_PROBLEM, |
| 70 | "CONNMARK target: Can't specify --save-mark twice"); |
| 71 | *flags = 1; |
| 72 | break; |
| 73 | case '3': |
| 74 | markinfo->mode = IPT_CONNMARK_RESTORE; |
| 75 | if (*flags) |
| 76 | exit_error(PARAMETER_PROBLEM, |
| 77 | "CONNMARK target: Can't specify --restore-mark twice"); |
| 78 | *flags = 1; |
| 79 | break; |
| 80 | default: |
| 81 | return 0; |
| 82 | } |
| 83 | |
| 84 | return 1; |
| 85 | } |
| 86 | |
| 87 | static void |
| 88 | final_check(unsigned int flags) |
| 89 | { |
| 90 | if (!flags) |
| 91 | exit_error(PARAMETER_PROBLEM, |
| 92 | "CONNMARK target: Parameter --set-mark is required"); |
| 93 | } |
| 94 | |
| 95 | static void |
| 96 | print_mark(unsigned long mark, int numeric) |
| 97 | { |
| 98 | printf("0x%lx ", mark); |
| 99 | } |
| 100 | |
| 101 | /* Prints out the targinfo. */ |
| 102 | static void |
| 103 | print(const struct ipt_ip *ip, |
| 104 | const struct ipt_entry_target *target, |
| 105 | int numeric) |
| 106 | { |
| 107 | const struct ipt_connmark_target_info *markinfo = |
| 108 | (const struct ipt_connmark_target_info *)target->data; |
| 109 | switch (markinfo->mode) { |
| 110 | case IPT_CONNMARK_SET: |
| 111 | printf("CONNMARK set "); |
| 112 | print_mark(markinfo->mark, numeric); |
| 113 | break; |
| 114 | case IPT_CONNMARK_SAVE: |
| 115 | printf("CONNMARK save "); |
| 116 | break; |
| 117 | case IPT_CONNMARK_RESTORE: |
| 118 | printf("CONNMARK restore "); |
| 119 | break; |
| 120 | default: |
| 121 | printf("ERROR: UNKNOWN CONNMARK MODE "); |
| 122 | break; |
| 123 | } |
| 124 | } |
| 125 | |
| 126 | /* Saves the union ipt_targinfo in parsable form to stdout. */ |
| 127 | static void |
| 128 | save(const struct ipt_ip *ip, const struct ipt_entry_target *target) |
| 129 | { |
| 130 | const struct ipt_connmark_target_info *markinfo = |
| 131 | (const struct ipt_connmark_target_info *)target->data; |
| 132 | |
| 133 | switch (markinfo->mode) { |
| 134 | case IPT_CONNMARK_SET: |
| 135 | printf("--set-mark 0x%lx ", markinfo->mark); |
| 136 | break; |
| 137 | case IPT_CONNMARK_SAVE: |
| 138 | printf("--save-mark "); |
| 139 | break; |
| 140 | case IPT_CONNMARK_RESTORE: |
| 141 | printf("--restore-mark "); |
| 142 | break; |
| 143 | default: |
| 144 | printf("ERROR: UNKNOWN CONNMARK MODE "); |
| 145 | break; |
| 146 | } |
| 147 | } |
| 148 | |
Harald Welte | cff123a | 2002-06-04 07:46:30 +0000 | [diff] [blame] | 149 | static |
Harald Welte | 0e81d5d | 2002-02-25 11:26:01 +0000 | [diff] [blame] | 150 | struct iptables_target mark |
| 151 | = { NULL, |
| 152 | "CONNMARK", |
Harald Welte | 80fe35d | 2002-05-29 13:08:15 +0000 | [diff] [blame] | 153 | IPTABLES_VERSION, |
Harald Welte | 0e81d5d | 2002-02-25 11:26:01 +0000 | [diff] [blame] | 154 | IPT_ALIGN(sizeof(struct ipt_connmark_target_info)), |
| 155 | IPT_ALIGN(sizeof(struct ipt_connmark_target_info)), |
| 156 | &help, |
| 157 | &init, |
| 158 | &parse, |
| 159 | &final_check, |
| 160 | &print, |
| 161 | &save, |
| 162 | opts |
| 163 | }; |
| 164 | |
| 165 | void _init(void) |
| 166 | { |
| 167 | register_target(&mark); |
| 168 | } |