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Diffstat (limited to 'src/route.h')
| -rw-r--r-- | src/route.h | 145 |
1 files changed, 145 insertions, 0 deletions
diff --git a/src/route.h b/src/route.h new file mode 100644 index 000000000000..45f0e1a7dc96 --- /dev/null +++ b/src/route.h @@ -0,0 +1,145 @@ +/* SPDX-License-Identifier: BSD-2-Clause */ +/* + * dhcpcd - route management + * Copyright (c) 2006-2021 Roy Marples <roy@marples.name> + * All rights reserved + + * rEDISTRIBUTION AND USE IN SOURCE AND BINARY FORMS, WITH OR WITHOUT + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#ifndef ROUTE_H +#define ROUTE_H + +#ifdef HAVE_SYS_RBTREE_H +#include <sys/rbtree.h> +#endif + +#include <sys/socket.h> +#include <net/route.h> + +#include <stdbool.h> + +#include "dhcpcd.h" +#include "sa.h" + +/* + * Enable the route free list by default as + * memory usage is still reported as low/unchanged even + * when dealing with millions of routes. + */ +#if !defined(RT_FREE_ROUTE_TABLE) +#define RT_FREE_ROUTE_TABLE 1 +#elif RT_FREE_ROUTE_TABLE == 0 +#undef RT_FREE_ROUTE_TABLE +#endif + +/* Some systems have route metrics. + * OpenBSD route priority is not this. */ +#ifndef HAVE_ROUTE_METRIC +# if defined(__linux__) +# define HAVE_ROUTE_METRIC 1 +# endif +#endif + +#ifdef __linux__ +# include <linux/version.h> /* RTA_PREF is only an enum.... */ +# if LINUX_VERSION_CODE >= KERNEL_VERSION(4, 1, 0) +# define HAVE_ROUTE_PREF +# endif +#endif + +#if defined(__OpenBSD__) || defined (__sun) +# define ROUTE_PER_GATEWAY +/* XXX dhcpcd doesn't really support this yet. + * But that's generally OK if only dhcpcd is managing routes. */ +#endif + +/* OpenBSD defines this as a "convienience" ..... we work around it. */ +#ifdef __OpenBSD__ +#undef rt_mtu +#endif + +struct rt { + union sa_ss rt_ss_dest; +#define rt_dest rt_ss_dest.sa + union sa_ss rt_ss_netmask; +#define rt_netmask rt_ss_netmask.sa + union sa_ss rt_ss_gateway; +#define rt_gateway rt_ss_gateway.sa + struct interface *rt_ifp; + union sa_ss rt_ss_ifa; +#define rt_ifa rt_ss_ifa.sa + unsigned int rt_flags; + unsigned int rt_mtu; +#ifdef HAVE_ROUTE_METRIC + unsigned int rt_metric; +#endif +/* Maximum interface index is generally USHORT_MAX or 65535. + * Add some padding for other stuff and we get offsets for the + * below that should work automatically. + * This is only an issue if the user defines higher metrics in + * their configuration, but then they might wish to override also. */ +#define RTMETRIC_BASE 1000U +#define RTMETRIC_WIRELESS 2000U +#define RTMETRIC_IPV4LL 1000000U +#define RTMETRIC_ROAM 2000000U +#ifdef HAVE_ROUTE_PREF + int rt_pref; +#endif +#define RTPREF_HIGH 1 +#define RTPREF_MEDIUM 0 /* has to be zero */ +#define RTPREF_LOW (-1) +#define RTPREF_RESERVED (-2) +#define RTPREF_INVALID (-3) /* internal */ + unsigned int rt_dflags; +#define RTDF_IFA_ROUTE 0x01 /* Address generated route */ +#define RTDF_FAKE 0x02 /* Maybe us on lease reboot */ +#define RTDF_IPV4LL 0x04 /* IPv4LL route */ +#define RTDF_RA 0x08 /* Router Advertisement */ +#define RTDF_DHCP 0x10 /* DHCP route */ +#define RTDF_STATIC 0x20 /* Configured in dhcpcd */ +#define RTDF_GATELINK 0x40 /* Gateway is on link */ + size_t rt_order; + rb_node_t rt_tree; +}; + +extern const rb_tree_ops_t rt_compare_list_ops; +extern const rb_tree_ops_t rt_compare_proto_ops; + +void rt_init(struct dhcpcd_ctx *); +void rt_dispose(struct dhcpcd_ctx *); +void rt_free(struct rt *); +void rt_freeif(struct interface *); +bool rt_is_default(const struct rt *); +void rt_headclear0(struct dhcpcd_ctx *, rb_tree_t *, int); +void rt_headclear(rb_tree_t *, int); +void rt_headfreeif(rb_tree_t *); +struct rt * rt_new0(struct dhcpcd_ctx *); +void rt_setif(struct rt *, struct interface *); +struct rt * rt_new(struct interface *); +struct rt * rt_proto_add_ctx(rb_tree_t *, struct rt *, struct dhcpcd_ctx *); +struct rt * rt_proto_add(rb_tree_t *, struct rt *); +int rt_cmp_dest(const struct rt *, const struct rt *); +void rt_recvrt(int, const struct rt *, pid_t); +void rt_build(struct dhcpcd_ctx *, int); + +#endif |