X-Git-Url: http://git.archive.openwrt.org/?p=project%2Ffirewall3.git;a=blobdiff_plain;f=defaults.c;h=7f3272857548f95c21c6f0aa847dcc7ecd861917;hp=1a25eaf8f3d96dd4c8e851e59367f5a6a73c6e69;hb=8eb517c56988da4c5a4c755672ae8f99e97bb4b2;hpb=ea1e5c25c1c4c8c82b51c0440d033944ccb4e2e2 diff --git a/defaults.c b/defaults.c index 1a25eaf..7f32728 100644 --- a/defaults.c +++ b/defaults.c @@ -60,7 +60,7 @@ static const struct chain toplevel_rules[] = { C(ANY, RAW, UNSPEC, "PREROUTING -j notrack"), }; -static struct fw3_option default_opts[] = { +const struct fw3_option fw3_default_opts[] = { FW3_OPT("input", target, defaults, policy_input), FW3_OPT("forward", target, defaults, policy_forward), FW3_OPT("output", target, defaults, policy_output), @@ -74,7 +74,6 @@ static struct fw3_option default_opts[] = { FW3_OPT("tcp_syncookies", bool, defaults, tcp_syncookies), FW3_OPT("tcp_ecn", bool, defaults, tcp_ecn), - FW3_OPT("tcp_westwood", bool, defaults, tcp_westwood), FW3_OPT("tcp_window_scaling", bool, defaults, tcp_window_scaling), FW3_OPT("accept_redirects", bool, defaults, accept_redirects), @@ -82,12 +81,14 @@ static struct fw3_option default_opts[] = { FW3_OPT("custom_chains", bool, defaults, custom_chains), FW3_OPT("disable_ipv6", bool, defaults, disable_ipv6), + + { } }; static bool print_chains(enum fw3_table table, enum fw3_family family, - const char *fmt, uint8_t flags, + const char *fmt, uint16_t flags, const struct chain *chains, int n) { bool rv = false; @@ -101,7 +102,7 @@ print_chains(enum fw3_table table, enum fw3_family family, if (c->table != table) continue; - if ((c->flag != FW3_DEFAULT_UNSPEC) && !(flags & (1 << c->flag))) + if ((c->flag != FW3_DEFAULT_UNSPEC) && !hasbit(flags, c->flag)) continue; fw3_pr(fmt, c->name); @@ -142,6 +143,8 @@ fw3_load_defaults(struct fw3_state *state, struct uci_package *p) defs->tcp_window_scaling = true; defs->custom_chains = true; + setbit(defs->flags, FW3_FAMILY_V4); + uci_foreach_element(&p->sections, e) { s = uci_to_section(e); @@ -155,18 +158,20 @@ fw3_load_defaults(struct fw3_state *state, struct uci_package *p) continue; } - fw3_parse_options(&state->defaults, - default_opts, ARRAY_SIZE(default_opts), s); + fw3_parse_options(&state->defaults, fw3_default_opts, s); check_policy(e, &defs->policy_input, "input"); check_policy(e, &defs->policy_output, "output"); check_policy(e, &defs->policy_forward, "forward"); + if (!defs->disable_ipv6) + setbit(defs->flags, FW3_FAMILY_V6); + if (defs->custom_chains) - defs->has_flag |= (1 << FW3_DEFAULT_CUSTOM_CHAINS); + setbit(defs->flags, FW3_DEFAULT_CUSTOM_CHAINS); if (defs->syn_flood) - defs->has_flag |= (1 << FW3_DEFAULT_SYN_FLOOD); + setbit(defs->flags, FW3_DEFAULT_SYN_FLOOD); } } @@ -175,24 +180,23 @@ fw3_print_default_chains(enum fw3_table table, enum fw3_family family, struct fw3_state *state) { struct fw3_defaults *defs = &state->defaults; - const char *policy[] = { - "(bug)", - "ACCEPT", - "DROP", - "DROP", - "(bug)", - "(bug)", - "(bug)", - }; + uint16_t mask = ~0; + +#define policy(t) \ + ((t == FW3_TARGET_REJECT) ? "DROP" : fw3_flag_names[t]) if (table == FW3_TABLE_FILTER) { - fw3_pr(":INPUT %s [0:0]\n", policy[defs->policy_input]); - fw3_pr(":FORWARD %s [0:0]\n", policy[defs->policy_forward]); - fw3_pr(":OUTPUT %s [0:0]\n", policy[defs->policy_output]); + fw3_pr(":INPUT %s [0:0]\n", policy(defs->policy_input)); + fw3_pr(":FORWARD %s [0:0]\n", policy(defs->policy_forward)); + fw3_pr(":OUTPUT %s [0:0]\n", policy(defs->policy_output)); } - print_chains(table, family, ":%s - [0:0]\n", defs->has_flag, + /* user chains already loaded, don't create again */ + if (hasbit(state->running_defaults.flags, FW3_DEFAULT_CUSTOM_CHAINS)) + delbit(mask, FW3_DEFAULT_CUSTOM_CHAINS); + + print_chains(table, family, ":%s - [0:0]\n", defs->flags & mask, default_chains, ARRAY_SIZE(default_chains)); } @@ -284,49 +288,82 @@ fw3_print_default_tail_rules(enum fw3_table table, enum fw3_family family, } static void -reset_policy(enum fw3_table table) +set_default(const char *name, bool set) +{ + FILE *f; + char path[sizeof("/proc/sys/net/ipv4/tcp_window_scaling\0")]; + + snprintf(path, sizeof(path), "/proc/sys/net/ipv4/tcp_%s", name); + + info(" * Set tcp_%s to %s", name, set ? "on" : "off", name); + + if (!(f = fopen(path, "w"))) + { + info(" ! Unable to write value: %s", strerror(errno)); + return; + } + + fprintf(f, "%u\n", set); + fclose(f); +} + +void +fw3_set_defaults(struct fw3_state *state) +{ + info("Setting sysctl values"); + + set_default("ecn", state->defaults.tcp_ecn); + set_default("syncookies", state->defaults.tcp_syncookies); + set_default("window_scaling", state->defaults.tcp_window_scaling); +} + +static void +reset_policy(enum fw3_table table, enum fw3_target policy) { if (table != FW3_TABLE_FILTER) return; - fw3_pr(":INPUT ACCEPT [0:0]\n"); - fw3_pr(":OUTPUT ACCEPT [0:0]\n"); - fw3_pr(":FORWARD ACCEPT [0:0]\n"); + fw3_pr(":INPUT %s [0:0]\n", fw3_flag_names[policy]); + fw3_pr(":OUTPUT %s [0:0]\n", fw3_flag_names[policy]); + fw3_pr(":FORWARD %s [0:0]\n", fw3_flag_names[policy]); } void fw3_flush_rules(enum fw3_table table, enum fw3_family family, - bool pass2, struct list_head *statefile) + bool pass2, struct fw3_state *state, enum fw3_target policy) { - struct fw3_statefile_entry *e; + struct fw3_defaults *d = &state->running_defaults; + uint16_t mask = ~0; + + if (!hasbit(d->flags, family)) + return; - list_for_each_entry(e, statefile, list) + /* don't touch user chains on selective stop */ + delbit(mask, FW3_DEFAULT_CUSTOM_CHAINS); + + if (!pass2) { - if (e->type != FW3_TYPE_DEFAULTS) - continue; + reset_policy(table, policy); - if (!pass2) - { - reset_policy(table); + print_chains(table, family, "-D %s\n", d->flags & mask, + toplevel_rules, ARRAY_SIZE(toplevel_rules)); - print_chains(table, family, "-D %s\n", e->flags[0], - toplevel_rules, ARRAY_SIZE(toplevel_rules)); + print_chains(table, family, "-F %s\n", d->flags & mask, + default_chains, ARRAY_SIZE(default_chains)); + } + else + { + print_chains(table, family, "-X %s\n", d->flags & mask, + default_chains, ARRAY_SIZE(default_chains)); - print_chains(table, family, "-F %s\n", e->flags[0], - default_chains, ARRAY_SIZE(default_chains)); - } - else - { - print_chains(table, family, "-X %s\n", e->flags[0], - default_chains, ARRAY_SIZE(default_chains)); - } + delbit(d->flags, family); } } void fw3_flush_all(enum fw3_table table) { - reset_policy(table); + reset_policy(table, FW3_TARGET_ACCEPT); fw3_pr("-F\n"); fw3_pr("-X\n");