| /* |
| * (C) 2005-2012 by Pablo Neira Ayuso <pablo@netfilter.org> |
| * (C) 2012 by Vyatta Inc. <http://www.vyatta.com> |
| * |
| * This program is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; either version 2 of the License, or |
| * (at your option) any later version. |
| */ |
| |
| #include "internal/internal.h" |
| |
| static int exp_cmp(int attr, |
| const struct nf_expect *exp1, |
| const struct nf_expect *exp2, |
| unsigned int flags, |
| int (*cmp)(const struct nf_expect *exp1, |
| const struct nf_expect *exp2, |
| unsigned int flags)) |
| { |
| int a = test_bit(attr, exp1->set); |
| int b = test_bit(attr, exp2->set); |
| |
| if (a && b) { |
| return cmp(exp1, exp2, flags); |
| } else if (!a && !b) { |
| return 1; |
| } else if (flags & NFCT_CMP_MASK && |
| test_bit(attr, exp1->set)) { |
| return 0; |
| } else if (flags & NFCT_CMP_STRICT) { |
| return 0; |
| } |
| return 1; |
| } |
| |
| static int |
| cmp_exp_master(const struct nf_expect *exp1, const struct nf_expect *exp2, |
| unsigned int flags) |
| { |
| return __cmp_orig((struct nf_conntrack *)&exp1->master, |
| (struct nf_conntrack *)&exp2->master, flags); |
| } |
| |
| static int |
| cmp_exp_expected(const struct nf_expect *exp1, const struct nf_expect *exp2, |
| unsigned int flags) |
| { |
| return __cmp_orig((struct nf_conntrack *)&exp1->expected, |
| (struct nf_conntrack *)&exp2->expected, flags); |
| } |
| |
| static int |
| cmp_exp_mask(const struct nf_expect *exp1, const struct nf_expect *exp2, |
| unsigned int flags) |
| { |
| return __cmp_orig((struct nf_conntrack *)&exp1->mask, |
| (struct nf_conntrack *)&exp2->mask, flags); |
| |
| } |
| |
| static int |
| cmp_exp_zone(const struct nf_expect *exp1, const struct nf_expect *exp2, |
| unsigned int flags) |
| { |
| return exp1->zone == exp2->zone; |
| } |
| |
| static int |
| cmp_exp_flags(const struct nf_expect *exp1, const struct nf_expect *exp2, |
| unsigned int flags) |
| { |
| return (exp1->flags == exp2->flags); |
| } |
| |
| static int |
| cmp_exp_hname(const struct nf_expect *exp1, const struct nf_expect *exp2, |
| unsigned int flags) |
| { |
| return strcmp(exp1->helper_name, exp2->helper_name) == 0; |
| } |
| |
| static int |
| cmp_exp_class(const struct nf_expect *exp1, const struct nf_expect *exp2, |
| unsigned int flags) |
| { |
| return (exp1->class == exp2->class); |
| } |
| |
| static int |
| cmp_exp_natt(const struct nf_expect *exp1, const struct nf_expect *exp2, |
| unsigned int flags) |
| { |
| return __cmp_orig((struct nf_conntrack *)&exp1->nat, |
| (struct nf_conntrack *)&exp2->nat, flags); |
| |
| } |
| |
| static int |
| cmp_exp_natdir(const struct nf_expect *exp1, const struct nf_expect *exp2, |
| unsigned int flags) |
| { |
| return exp1->nat_dir == exp2->nat_dir; |
| } |
| |
| static int |
| cmp_exp_expfn(const struct nf_expect *exp1, const struct nf_expect *exp2, |
| unsigned int flags) |
| { |
| return strcmp(exp1->expectfn, exp2->expectfn) == 0; |
| } |
| |
| |
| int __cmp_expect(const struct nf_expect *exp1, |
| const struct nf_expect *exp2, |
| unsigned int flags) |
| { |
| if (!exp_cmp(ATTR_EXP_MASTER, exp1, exp2, flags, cmp_exp_master)) |
| return 0; |
| if (!exp_cmp(ATTR_EXP_EXPECTED, exp1, exp2, flags, cmp_exp_expected)) |
| return 0; |
| if (!exp_cmp(ATTR_EXP_MASK, exp1, exp2, flags, cmp_exp_mask)) |
| return 0; |
| /* ATTR_EXP_TIMEOUT is intentionally not compared at this time; the expectations should |
| * be considered equal if only the timeout is different */ |
| if (!exp_cmp(ATTR_EXP_ZONE, exp1, exp2, flags, cmp_exp_zone)) |
| return 0; |
| if (!exp_cmp(ATTR_EXP_FLAGS, exp1, exp2, flags, cmp_exp_flags)) |
| return 0; |
| if (!exp_cmp(ATTR_EXP_HELPER_NAME, exp1, exp2, flags, cmp_exp_hname)) |
| return 0; |
| if (!exp_cmp(ATTR_EXP_CLASS, exp1, exp2, flags, cmp_exp_class)) |
| return 0; |
| if (!exp_cmp(ATTR_EXP_NAT_TUPLE, exp1, exp2, flags, cmp_exp_natt)) |
| return 0; |
| if (!exp_cmp(ATTR_EXP_NAT_DIR, exp1, exp2, flags, cmp_exp_natdir)) |
| return 0; |
| if (!exp_cmp(ATTR_EXP_FN, exp1, exp2, flags, cmp_exp_expfn)) |
| return 0; |
| return 1; |
| } |