diff options
Diffstat (limited to 'extensions/libip6t_TCPMSS.c')
-rw-r--r-- | extensions/libip6t_TCPMSS.c | 134 |
1 files changed, 0 insertions, 134 deletions
diff --git a/extensions/libip6t_TCPMSS.c b/extensions/libip6t_TCPMSS.c deleted file mode 100644 index 7fcccd5..0000000 --- a/extensions/libip6t_TCPMSS.c +++ /dev/null @@ -1,134 +0,0 @@ -/* Shared library add-on to iptables to add TCPMSS target support. - * - * Copyright (c) 2000 Marc Boucher -*/ -#include <stdio.h> -#include <string.h> -#include <stdlib.h> -#include <getopt.h> - -#include <ip6tables.h> -#include <linux/netfilter_ipv6/ip6_tables.h> -#include <linux/netfilter_ipv6/ip6t_TCPMSS.h> - -struct mssinfo { - struct ip6t_entry_target t; - struct ip6t_tcpmss_info mss; -}; - -/* Function which prints out usage message. */ -static void -help(void) -{ - printf( -"TCPMSS target v%s mutually-exclusive options:\n" -" --set-mss value explicitly set MSS option to specified value\n" -" --clamp-mss-to-pmtu automatically clamp MSS value to (path_MTU - 60)\n", -IPTABLES_VERSION); -} - -static struct option opts[] = { - { "set-mss", 1, 0, '1' }, - { "clamp-mss-to-pmtu", 0, 0, '2' }, - { 0 } -}; - -/* Initialize the target. */ -static void -init(struct ip6t_entry_target *t, unsigned int *nfcache) -{ -} - -/* Function which parses command options; returns true if it - ate an option */ -static int -parse(int c, char **argv, int invert, unsigned int *flags, - const struct ip6t_entry *entry, - struct ip6t_entry_target **target) -{ - struct ip6t_tcpmss_info *mssinfo - = (struct ip6t_tcpmss_info *)(*target)->data; - - switch (c) { - unsigned int mssval; - - case '1': - if (*flags) - exit_error(PARAMETER_PROBLEM, - "TCPMSS target: Only one option may be specified"); - if (string_to_number(optarg, 0, 65535 - 60, &mssval) == -1) - exit_error(PARAMETER_PROBLEM, "Bad TCPMSS value `%s'", optarg); - - mssinfo->mss = mssval; - *flags = 1; - break; - - case '2': - if (*flags) - exit_error(PARAMETER_PROBLEM, - "TCPMSS target: Only one option may be specified"); - mssinfo->mss = IP6T_TCPMSS_CLAMP_PMTU; - *flags = 1; - break; - - default: - return 0; - } - - return 1; -} - -static void -final_check(unsigned int flags) -{ - if (!flags) - exit_error(PARAMETER_PROBLEM, - "TCPMSS target: At least one parameter is required"); -} - -/* Prints out the targinfo. */ -static void -print(const struct ip6t_ip6 *ip6, - const struct ip6t_entry_target *target, - int numeric) -{ - const struct ip6t_tcpmss_info *mssinfo = - (const struct ip6t_tcpmss_info *)target->data; - if(mssinfo->mss == IP6T_TCPMSS_CLAMP_PMTU) - printf("TCPMSS clamp to PMTU "); - else - printf("TCPMSS set %u ", mssinfo->mss); -} - -/* Saves the union ip6t_targinfo in parsable form to stdout. */ -static void -save(const struct ip6t_ip6 *ip, const struct ip6t_entry_target *target) -{ - const struct ip6t_tcpmss_info *mssinfo = - (const struct ip6t_tcpmss_info *)target->data; - - if(mssinfo->mss == IP6T_TCPMSS_CLAMP_PMTU) - printf("--clamp-mss-to-pmtu "); - else - printf("--set-mss %u ", mssinfo->mss); -} - -static struct ip6tables_target mss = { - .next = NULL, - .name = "TCPMSS", - .version = IPTABLES_VERSION, - .size = IP6T_ALIGN(sizeof(struct ip6t_tcpmss_info)), - .userspacesize = IP6T_ALIGN(sizeof(struct ip6t_tcpmss_info)), - .help = &help, - .init = &init, - .parse = &parse, - .final_check = &final_check, - .print = &print, - .save = &save, - .extra_opts = opts -}; - -void _init(void) -{ - register_target6(&mss); -} |