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-rw-r--r--src/shared/firewall-util.c357
1 files changed, 0 insertions, 357 deletions
diff --git a/src/shared/firewall-util.c b/src/shared/firewall-util.c
deleted file mode 100644
index f73108eaa3..0000000000
--- a/src/shared/firewall-util.c
+++ /dev/null
@@ -1,357 +0,0 @@
-/***
- This file is part of systemd.
-
- Copyright 2015 Lennart Poettering
-
- systemd is free software; you can redistribute it and/or modify it
- under the terms of the GNU Lesser General Public License as published by
- the Free Software Foundation; either version 2.1 of the License, or
- (at your option) any later version.
-
- systemd is distributed in the hope that it will be useful, but
- WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- Lesser General Public License for more details.
-
- You should have received a copy of the GNU Lesser General Public License
- along with systemd; If not, see <http://www.gnu.org/licenses/>.
-***/
-
-#warning "Temporary work-around for broken glibc vs. linux kernel header definitions"
-#warning "This really should be removed sooner rather than later, when this is fixed upstream"
-#define _NET_IF_H 1
-
-#include <alloca.h>
-#include <arpa/inet.h>
-#include <endian.h>
-#include <errno.h>
-#include <stddef.h>
-#include <string.h>
-#include <sys/socket.h>
-#include <net/if.h>
-#ifndef IFNAMSIZ
-#define IFNAMSIZ 16
-#endif
-#include <linux/if.h>
-#include <linux/netfilter_ipv4/ip_tables.h>
-#include <linux/netfilter/nf_nat.h>
-#include <linux/netfilter/xt_addrtype.h>
-#include <libiptc/libiptc.h>
-
-#include "alloc-util.h"
-#include "firewall-util.h"
-#include "in-addr-util.h"
-#include "macro.h"
-#include "socket-util.h"
-
-DEFINE_TRIVIAL_CLEANUP_FUNC(struct xtc_handle*, iptc_free);
-
-static int entry_fill_basics(
- struct ipt_entry *entry,
- int protocol,
- const char *in_interface,
- const union in_addr_union *source,
- unsigned source_prefixlen,
- const char *out_interface,
- const union in_addr_union *destination,
- unsigned destination_prefixlen) {
-
- assert(entry);
-
- if (out_interface && !ifname_valid(out_interface))
- return -EINVAL;
- if (in_interface && !ifname_valid(in_interface))
- return -EINVAL;
-
- entry->ip.proto = protocol;
-
- if (in_interface) {
- strcpy(entry->ip.iniface, in_interface);
- memset(entry->ip.iniface_mask, 0xFF, strlen(in_interface)+1);
- }
- if (source) {
- entry->ip.src = source->in;
- in_addr_prefixlen_to_netmask(&entry->ip.smsk, source_prefixlen);
- }
-
- if (out_interface) {
- strcpy(entry->ip.outiface, out_interface);
- memset(entry->ip.outiface_mask, 0xFF, strlen(out_interface)+1);
- }
- if (destination) {
- entry->ip.dst = destination->in;
- in_addr_prefixlen_to_netmask(&entry->ip.dmsk, destination_prefixlen);
- }
-
- return 0;
-}
-
-int fw_add_masquerade(
- bool add,
- int af,
- int protocol,
- const union in_addr_union *source,
- unsigned source_prefixlen,
- const char *out_interface,
- const union in_addr_union *destination,
- unsigned destination_prefixlen) {
-
- _cleanup_(iptc_freep) struct xtc_handle *h = NULL;
- struct ipt_entry *entry, *mask;
- struct ipt_entry_target *t;
- size_t sz;
- struct nf_nat_ipv4_multi_range_compat *mr;
- int r;
-
- if (af != AF_INET)
- return -EOPNOTSUPP;
-
- if (protocol != 0 && protocol != IPPROTO_TCP && protocol != IPPROTO_UDP)
- return -EOPNOTSUPP;
-
- h = iptc_init("nat");
- if (!h)
- return -errno;
-
- sz = XT_ALIGN(sizeof(struct ipt_entry)) +
- XT_ALIGN(sizeof(struct ipt_entry_target)) +
- XT_ALIGN(sizeof(struct nf_nat_ipv4_multi_range_compat));
-
- /* Put together the entry we want to add or remove */
- entry = alloca0(sz);
- entry->next_offset = sz;
- entry->target_offset = XT_ALIGN(sizeof(struct ipt_entry));
- r = entry_fill_basics(entry, protocol, NULL, source, source_prefixlen, out_interface, destination, destination_prefixlen);
- if (r < 0)
- return r;
-
- /* Fill in target part */
- t = ipt_get_target(entry);
- t->u.target_size =
- XT_ALIGN(sizeof(struct ipt_entry_target)) +
- XT_ALIGN(sizeof(struct nf_nat_ipv4_multi_range_compat));
- strncpy(t->u.user.name, "MASQUERADE", sizeof(t->u.user.name));
- mr = (struct nf_nat_ipv4_multi_range_compat*) t->data;
- mr->rangesize = 1;
-
- /* Create a search mask entry */
- mask = alloca(sz);
- memset(mask, 0xFF, sz);
-
- if (add) {
- if (iptc_check_entry("POSTROUTING", entry, (unsigned char*) mask, h))
- return 0;
- if (errno != ENOENT) /* if other error than not existing yet, fail */
- return -errno;
-
- if (!iptc_insert_entry("POSTROUTING", entry, 0, h))
- return -errno;
- } else {
- if (!iptc_delete_entry("POSTROUTING", entry, (unsigned char*) mask, h)) {
- if (errno == ENOENT) /* if it's already gone, all is good! */
- return 0;
-
- return -errno;
- }
- }
-
- if (!iptc_commit(h))
- return -errno;
-
- return 0;
-}
-
-int fw_add_local_dnat(
- bool add,
- int af,
- int protocol,
- const char *in_interface,
- const union in_addr_union *source,
- unsigned source_prefixlen,
- const union in_addr_union *destination,
- unsigned destination_prefixlen,
- uint16_t local_port,
- const union in_addr_union *remote,
- uint16_t remote_port,
- const union in_addr_union *previous_remote) {
-
-
- _cleanup_(iptc_freep) struct xtc_handle *h = NULL;
- struct ipt_entry *entry, *mask;
- struct ipt_entry_target *t;
- struct ipt_entry_match *m;
- struct xt_addrtype_info_v1 *at;
- struct nf_nat_ipv4_multi_range_compat *mr;
- size_t sz, msz;
- int r;
-
- assert(add || !previous_remote);
-
- if (af != AF_INET)
- return -EOPNOTSUPP;
-
- if (protocol != IPPROTO_TCP && protocol != IPPROTO_UDP)
- return -EOPNOTSUPP;
-
- if (local_port <= 0)
- return -EINVAL;
-
- if (remote_port <= 0)
- return -EINVAL;
-
- h = iptc_init("nat");
- if (!h)
- return -errno;
-
- sz = XT_ALIGN(sizeof(struct ipt_entry)) +
- XT_ALIGN(sizeof(struct ipt_entry_match)) +
- XT_ALIGN(sizeof(struct xt_addrtype_info_v1)) +
- XT_ALIGN(sizeof(struct ipt_entry_target)) +
- XT_ALIGN(sizeof(struct nf_nat_ipv4_multi_range_compat));
-
- if (protocol == IPPROTO_TCP)
- msz = XT_ALIGN(sizeof(struct ipt_entry_match)) +
- XT_ALIGN(sizeof(struct xt_tcp));
- else
- msz = XT_ALIGN(sizeof(struct ipt_entry_match)) +
- XT_ALIGN(sizeof(struct xt_udp));
-
- sz += msz;
-
- /* Fill in basic part */
- entry = alloca0(sz);
- entry->next_offset = sz;
- entry->target_offset =
- XT_ALIGN(sizeof(struct ipt_entry)) +
- XT_ALIGN(sizeof(struct ipt_entry_match)) +
- XT_ALIGN(sizeof(struct xt_addrtype_info_v1)) +
- msz;
- r = entry_fill_basics(entry, protocol, in_interface, source, source_prefixlen, NULL, destination, destination_prefixlen);
- if (r < 0)
- return r;
-
- /* Fill in first match */
- m = (struct ipt_entry_match*) ((uint8_t*) entry + XT_ALIGN(sizeof(struct ipt_entry)));
- m->u.match_size = msz;
- if (protocol == IPPROTO_TCP) {
- struct xt_tcp *tcp;
-
- strncpy(m->u.user.name, "tcp", sizeof(m->u.user.name));
- tcp = (struct xt_tcp*) m->data;
- tcp->dpts[0] = tcp->dpts[1] = local_port;
- tcp->spts[0] = 0;
- tcp->spts[1] = 0xFFFF;
-
- } else {
- struct xt_udp *udp;
-
- strncpy(m->u.user.name, "udp", sizeof(m->u.user.name));
- udp = (struct xt_udp*) m->data;
- udp->dpts[0] = udp->dpts[1] = local_port;
- udp->spts[0] = 0;
- udp->spts[1] = 0xFFFF;
- }
-
- /* Fill in second match */
- m = (struct ipt_entry_match*) ((uint8_t*) entry + XT_ALIGN(sizeof(struct ipt_entry)) + msz);
- m->u.match_size =
- XT_ALIGN(sizeof(struct ipt_entry_match)) +
- XT_ALIGN(sizeof(struct xt_addrtype_info_v1));
- strncpy(m->u.user.name, "addrtype", sizeof(m->u.user.name));
- m->u.user.revision = 1;
- at = (struct xt_addrtype_info_v1*) m->data;
- at->dest = XT_ADDRTYPE_LOCAL;
-
- /* Fill in target part */
- t = ipt_get_target(entry);
- t->u.target_size =
- XT_ALIGN(sizeof(struct ipt_entry_target)) +
- XT_ALIGN(sizeof(struct nf_nat_ipv4_multi_range_compat));
- strncpy(t->u.user.name, "DNAT", sizeof(t->u.user.name));
- mr = (struct nf_nat_ipv4_multi_range_compat*) t->data;
- mr->rangesize = 1;
- mr->range[0].flags = NF_NAT_RANGE_PROTO_SPECIFIED|NF_NAT_RANGE_MAP_IPS;
- mr->range[0].min_ip = mr->range[0].max_ip = remote->in.s_addr;
- if (protocol == IPPROTO_TCP)
- mr->range[0].min.tcp.port = mr->range[0].max.tcp.port = htons(remote_port);
- else
- mr->range[0].min.udp.port = mr->range[0].max.udp.port = htons(remote_port);
-
- mask = alloca0(sz);
- memset(mask, 0xFF, sz);
-
- if (add) {
- /* Add the PREROUTING rule, if it is missing so far */
- if (!iptc_check_entry("PREROUTING", entry, (unsigned char*) mask, h)) {
- if (errno != ENOENT)
- return -EINVAL;
-
- if (!iptc_insert_entry("PREROUTING", entry, 0, h))
- return -errno;
- }
-
- /* If a previous remote is set, remove its entry */
- if (previous_remote && previous_remote->in.s_addr != remote->in.s_addr) {
- mr->range[0].min_ip = mr->range[0].max_ip = previous_remote->in.s_addr;
-
- if (!iptc_delete_entry("PREROUTING", entry, (unsigned char*) mask, h)) {
- if (errno != ENOENT)
- return -errno;
- }
-
- mr->range[0].min_ip = mr->range[0].max_ip = remote->in.s_addr;
- }
-
- /* Add the OUTPUT rule, if it is missing so far */
- if (!in_interface) {
-
- /* Don't apply onto loopback addresses */
- if (!destination) {
- entry->ip.dst.s_addr = htobe32(0x7F000000);
- entry->ip.dmsk.s_addr = htobe32(0xFF000000);
- entry->ip.invflags = IPT_INV_DSTIP;
- }
-
- if (!iptc_check_entry("OUTPUT", entry, (unsigned char*) mask, h)) {
- if (errno != ENOENT)
- return -errno;
-
- if (!iptc_insert_entry("OUTPUT", entry, 0, h))
- return -errno;
- }
-
- /* If a previous remote is set, remove its entry */
- if (previous_remote && previous_remote->in.s_addr != remote->in.s_addr) {
- mr->range[0].min_ip = mr->range[0].max_ip = previous_remote->in.s_addr;
-
- if (!iptc_delete_entry("OUTPUT", entry, (unsigned char*) mask, h)) {
- if (errno != ENOENT)
- return -errno;
- }
- }
- }
- } else {
- if (!iptc_delete_entry("PREROUTING", entry, (unsigned char*) mask, h)) {
- if (errno != ENOENT)
- return -errno;
- }
-
- if (!in_interface) {
- if (!destination) {
- entry->ip.dst.s_addr = htobe32(0x7F000000);
- entry->ip.dmsk.s_addr = htobe32(0xFF000000);
- entry->ip.invflags = IPT_INV_DSTIP;
- }
-
- if (!iptc_delete_entry("OUTPUT", entry, (unsigned char*) mask, h)) {
- if (errno != ENOENT)
- return -errno;
- }
- }
- }
-
- if (!iptc_commit(h))
- return -errno;
-
- return 0;
-}
generated by cgit v1.2.3 (git 2.25.1) at 2024-06-01 11:06:19 +0000