src/network/networkd-netdev-tunnel.c - systemd-stable - Rivoreo Source Code Repositories

 /*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/

 /***
     This file is part of systemd.

     Copyright 2014 Susant Sahani <susant@redhat.com>

     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/>.
 ***/

 #include <netinet/ether.h>
 #include <arpa/inet.h>
 #include <net/if.h>
 #include <linux/ip.h>
 #include <linux/if_tunnel.h>

 #include "sd-rtnl.h"
 #include "networkd-netdev-tunnel.h"
 #include "networkd-link.h"
 #include "network-internal.h"
 #include "util.h"
 #include "missing.h"
 #include "conf-parser.h"

 static int netdev_ipip_fill_message_create(NetDev *netdev, Link *link, sd_rtnl_message *m) {
         Tunnel *t = IPIP(netdev);
         int r;

         assert(netdev);
         assert(link);
         assert(m);
         assert(t);
         assert(t->family == AF_INET);

         r = sd_rtnl_message_append_u32(m, IFLA_IPTUN_LINK, link->ifindex);
         if (r < 0) {
                 log_error_netdev(netdev,
                                  "Could not append IFLA_IPTUN_LINK attribute: %s",
                                  strerror(-r));
                 return r;
         }

         r = sd_rtnl_message_append_in_addr(m, IFLA_IPTUN_LOCAL, &t->local.in);
         if (r < 0) {
                 log_error_netdev(netdev,
                                  "Could not append IFLA_IPTUN_LOCAL attribute: %s",
                                  strerror(-r));
                 return r;
         }

         r = sd_rtnl_message_append_in_addr(m, IFLA_IPTUN_REMOTE, &t->remote.in);
         if (r < 0) {
                 log_error_netdev(netdev,
                                  "Could not append IFLA_IPTUN_REMOTE attribute: %s",
                                  strerror(-r));
                 return r;
         }

         r = sd_rtnl_message_append_u8(m, IFLA_IPTUN_TTL, t->ttl);
         if (r < 0) {
                 log_error_netdev(netdev,
                                  "Could not append IFLA_IPTUN_TTL  attribute: %s",
                                  strerror(-r));
                 return r;
         }

         return r;
 }

 static int netdev_sit_fill_message_create(NetDev *netdev, Link *link, sd_rtnl_message *m) {
         Tunnel *t = SIT(netdev);
         int r;

         assert(netdev);
         assert(link);
         assert(m);
         assert(t);
         assert(t->family == AF_INET);

         r = sd_rtnl_message_append_u32(m, IFLA_IPTUN_LINK, link->ifindex);
         if (r < 0) {
                 log_error_netdev(netdev,
                                  "Could not append IFLA_IPTUN_LINK attribute: %s",
                                  strerror(-r));
                 return r;
         }

         r = sd_rtnl_message_append_in_addr(m, IFLA_IPTUN_LOCAL, &t->local.in);
         if (r < 0) {
                 log_error_netdev(netdev,
                                  "Could not append IFLA_IPTUN_LOCAL attribute: %s",
                                  strerror(-r));
                 return r;
         }

         r = sd_rtnl_message_append_in_addr(m, IFLA_IPTUN_REMOTE, &t->remote.in);
         if (r < 0) {
                 log_error_netdev(netdev,
                                  "Could not append IFLA_IPTUN_REMOTE attribute: %s",
                                  strerror(-r));
                 return r;
         }

         r = sd_rtnl_message_append_u8(m, IFLA_IPTUN_TTL, t->ttl);
         if (r < 0) {
                 log_error_netdev(netdev,
                                  "Could not append IFLA_IPTUN_TTL attribute: %s",
                                  strerror(-r));
                 return r;
         }

         return r;
 }

 static int netdev_gre_fill_message_create(NetDev *netdev, Link *link, sd_rtnl_message *m) {
         Tunnel *t = GRE(netdev);
         int r;

         assert(netdev);
         assert(link);
         assert(m);
         assert(t);
         assert(t->family == AF_INET);

         r = sd_rtnl_message_append_u32(m, IFLA_GRE_LINK, link->ifindex);
         if (r < 0) {
                 log_error_netdev(netdev,
                                  "Could not append IFLA_GRE_LINK attribute: %s",
                                  strerror(-r));
                 return r;
         }

         r = sd_rtnl_message_append_in_addr(m, IFLA_GRE_LOCAL, &t->local.in);
         if (r < 0) {
                 log_error_netdev(netdev,
                                  "Could not append IFLA_GRE_LOCAL attribute: %s",
                                  strerror(-r));
                 return r;
         }

         r = sd_rtnl_message_append_in_addr(m, IFLA_GRE_REMOTE, &t->remote.in);
         if (r < 0) {
                 log_error_netdev(netdev,
                                  "Could not append IFLA_GRE_REMOTE attribute: %s",
                                  strerror(-r));
                 return r;
         }

         r = sd_rtnl_message_append_u8(m, IFLA_GRE_TTL, t->ttl);
         if (r < 0) {
                 log_error_netdev(netdev,
                                  "Could not append IFLA_GRE_TTL attribute: %s",
                                  strerror(-r));
                 return r;
         }

         r = sd_rtnl_message_append_u8(m, IFLA_GRE_TOS, t->tos);
         if (r < 0) {
                 log_error_netdev(netdev,
                                  "Could not append IFLA_GRE_TOS attribute: %s",
                                  strerror(-r));
                 return r;
         }

         return r;
 }

 static int netdev_vti_fill_message_create(NetDev *netdev, Link *link, sd_rtnl_message *m) {
         Tunnel *t = VTI(netdev);
         int r;

         assert(netdev);
         assert(link);
         assert(m);
         assert(t);
         assert(t->family == AF_INET);

         r = sd_rtnl_message_append_u32(m, IFLA_VTI_LINK, link->ifindex);
         if (r < 0) {
                 log_error_netdev(netdev,
                                  "Could not append IFLA_IPTUN_LINK attribute: %s",
                                  strerror(-r));
                 return r;
         }

         r = sd_rtnl_message_append_in_addr(m, IFLA_VTI_LOCAL, &t->local.in);
         if (r < 0) {
                 log_error_netdev(netdev,
                                  "Could not append IFLA_IPTUN_LOCAL attribute: %s",
                                  strerror(-r));
                 return r;
         }

         r = sd_rtnl_message_append_in_addr(m, IFLA_VTI_REMOTE, &t->remote.in);
         if (r < 0) {
                 log_error_netdev(netdev,
                                  "Could not append IFLA_IPTUN_REMOTE attribute: %s",
                                  strerror(-r));
                 return r;
         }

         return r;
 }

 static int netdev_tunnel_verify(NetDev *netdev, const char *filename) {
         Tunnel *t = NULL;

         assert(netdev);
         assert(filename);

         switch (netdev->kind) {
         case NETDEV_KIND_IPIP:
                 t = IPIP(netdev);
                 break;
         case NETDEV_KIND_SIT:
                 t = SIT(netdev);
                 break;
         case NETDEV_KIND_GRE:
                 t = GRE(netdev);
                 break;
         case NETDEV_KIND_VTI:
                 t = VTI(netdev);
                 break;
         default:
                 assert_not_reached("Invalid tunnel kind");
         }

         assert(t);

         if (t->local.in.s_addr == INADDR_ANY) {
                log_warning("Tunnel without local address configured in %s. Ignoring", filename);
                return -EINVAL;
         }

         if (t->remote.in.s_addr == INADDR_ANY) {
                log_warning("Tunnel without remote address configured in %s. Ignoring", filename);
                return -EINVAL;
         }

         if (t->family != AF_INET) {
               log_warning("Tunnel with invalid address family configured in %s. Ignoring", filename);
               return -EINVAL;
         }

         return 0;
 }

 int config_parse_tunnel_address(const char *unit,
                                 const char *filename,
                                 unsigned line,
                                 const char *section,
                                 unsigned section_line,
                                 const char *lvalue,
                                 int ltype,
                                 const char *rvalue,
                                 void *data,
                                 void *userdata) {
         Tunnel *t = userdata;
         union in_addr_union *addr = data, buffer;
         int r, f;

         assert(filename);
         assert(lvalue);
         assert(rvalue);
         assert(data);

         r = in_addr_from_string_auto(rvalue, &f, &buffer);
         if (r < 0) {
                 log_syntax(unit, LOG_ERR, filename, line, EINVAL, "Tunnel address is invalid, ignoring assignment: %s", rvalue);
                 return 0;
         }

         if (t->family != AF_UNSPEC && t->family != f) {
                 log_syntax(unit, LOG_ERR, filename, line, EINVAL, "Tunnel addresses incompatible, ignoring assignment: %s", rvalue);
                 return 0;
         }

         t->family = f;
         *addr = buffer;

         return 0;
 }

 static void ipip_init(NetDev *n) {
         Tunnel *t = IPIP(n);

         assert(n);
         assert(t);

         t->pmtudisc = true;
 }

 static void sit_init(NetDev *n) {
         Tunnel *t = SIT(n);

         assert(n);
         assert(t);

         t->pmtudisc = true;
 }

 static void vti_init(NetDev *n) {
         Tunnel *t = VTI(n);

         assert(n);
         assert(t);

         t->pmtudisc = true;
 }

 static void gre_init(NetDev *n) {
         Tunnel *t = GRE(n);

         assert(n);
         assert(t);

         t->pmtudisc = true;
 }

 const NetDevVTable ipip_vtable = {
         .object_size = sizeof(Tunnel),
         .init = ipip_init,
         .sections = "Match\0NetDev\0Tunnel\0",
         .fill_message_create = netdev_ipip_fill_message_create,
         .create_type = NETDEV_CREATE_STACKED,
         .config_verify = netdev_tunnel_verify,
 };

 const NetDevVTable sit_vtable = {
         .object_size = sizeof(Tunnel),
         .init = sit_init,
         .sections = "Match\0NetDev\0Tunnel\0",
         .fill_message_create = netdev_sit_fill_message_create,
         .create_type = NETDEV_CREATE_STACKED,
         .config_verify = netdev_tunnel_verify,
 };

 const NetDevVTable vti_vtable = {
         .object_size = sizeof(Tunnel),
         .init = vti_init,
         .sections = "Match\0NetDev\0Tunnel\0",
         .fill_message_create = netdev_vti_fill_message_create,
         .create_type = NETDEV_CREATE_STACKED,
         .config_verify = netdev_tunnel_verify,
 };

 const NetDevVTable gre_vtable = {
         .object_size = sizeof(Tunnel),
         .init = gre_init,
         .sections = "Match\0NetDev\0Tunnel\0",
         .fill_message_create = netdev_gre_fill_message_create,
         .create_type = NETDEV_CREATE_STACKED,
         .config_verify = netdev_tunnel_verify,
 };
	/-- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil --/

	/***
	This file is part of systemd.

	Copyright 2014 Susant Sahani <susant@redhat.com>

	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/>.
	***/

	#include <netinet/ether.h>
	#include <arpa/inet.h>
	#include <net/if.h>
	#include <linux/ip.h>
	#include <linux/if_tunnel.h>

	#include "sd-rtnl.h"
	#include "networkd-netdev-tunnel.h"
	#include "networkd-link.h"
	#include "network-internal.h"
	#include "util.h"
	#include "missing.h"
	#include "conf-parser.h"

	static int netdev_ipip_fill_message_create(NetDev netdev, Link link, sd_rtnl_message *m) {
	Tunnel *t = IPIP(netdev);
	int r;

	assert(netdev);
	assert(link);
	assert(m);
	assert(t);
	assert(t->family == AF_INET);

	r = sd_rtnl_message_append_u32(m, IFLA_IPTUN_LINK, link->ifindex);
	if (r < 0) {
	log_error_netdev(netdev,
	"Could not append IFLA_IPTUN_LINK attribute: %s",
	strerror(-r));
	return r;
	}

	r = sd_rtnl_message_append_in_addr(m, IFLA_IPTUN_LOCAL, &t->local.in);
	if (r < 0) {
	log_error_netdev(netdev,
	"Could not append IFLA_IPTUN_LOCAL attribute: %s",
	strerror(-r));
	return r;
	}

	r = sd_rtnl_message_append_in_addr(m, IFLA_IPTUN_REMOTE, &t->remote.in);
	if (r < 0) {
	log_error_netdev(netdev,
	"Could not append IFLA_IPTUN_REMOTE attribute: %s",
	strerror(-r));
	return r;
	}

	r = sd_rtnl_message_append_u8(m, IFLA_IPTUN_TTL, t->ttl);
	if (r < 0) {
	log_error_netdev(netdev,
	"Could not append IFLA_IPTUN_TTL attribute: %s",
	strerror(-r));
	return r;
	}

	return r;
	}

	static int netdev_sit_fill_message_create(NetDev netdev, Link link, sd_rtnl_message *m) {
	Tunnel *t = SIT(netdev);
	int r;

	assert(netdev);
	assert(link);
	assert(m);
	assert(t);
	assert(t->family == AF_INET);

	r = sd_rtnl_message_append_u32(m, IFLA_IPTUN_LINK, link->ifindex);
	if (r < 0) {
	log_error_netdev(netdev,
	"Could not append IFLA_IPTUN_LINK attribute: %s",
	strerror(-r));
	return r;
	}

	r = sd_rtnl_message_append_in_addr(m, IFLA_IPTUN_LOCAL, &t->local.in);
	if (r < 0) {
	log_error_netdev(netdev,
	"Could not append IFLA_IPTUN_LOCAL attribute: %s",
	strerror(-r));
	return r;
	}

	r = sd_rtnl_message_append_in_addr(m, IFLA_IPTUN_REMOTE, &t->remote.in);
	if (r < 0) {
	log_error_netdev(netdev,
	"Could not append IFLA_IPTUN_REMOTE attribute: %s",
	strerror(-r));
	return r;
	}

	r = sd_rtnl_message_append_u8(m, IFLA_IPTUN_TTL, t->ttl);
	if (r < 0) {
	log_error_netdev(netdev,
	"Could not append IFLA_IPTUN_TTL attribute: %s",
	strerror(-r));
	return r;
	}

	return r;
	}

	static int netdev_gre_fill_message_create(NetDev netdev, Link link, sd_rtnl_message *m) {
	Tunnel *t = GRE(netdev);
	int r;

	assert(netdev);
	assert(link);
	assert(m);
	assert(t);
	assert(t->family == AF_INET);

	r = sd_rtnl_message_append_u32(m, IFLA_GRE_LINK, link->ifindex);
	if (r < 0) {
	log_error_netdev(netdev,
	"Could not append IFLA_GRE_LINK attribute: %s",
	strerror(-r));
	return r;
	}

	r = sd_rtnl_message_append_in_addr(m, IFLA_GRE_LOCAL, &t->local.in);
	if (r < 0) {
	log_error_netdev(netdev,
	"Could not append IFLA_GRE_LOCAL attribute: %s",
	strerror(-r));
	return r;
	}

	r = sd_rtnl_message_append_in_addr(m, IFLA_GRE_REMOTE, &t->remote.in);
	if (r < 0) {
	log_error_netdev(netdev,
	"Could not append IFLA_GRE_REMOTE attribute: %s",
	strerror(-r));
	return r;
	}

	r = sd_rtnl_message_append_u8(m, IFLA_GRE_TTL, t->ttl);
	if (r < 0) {
	log_error_netdev(netdev,
	"Could not append IFLA_GRE_TTL attribute: %s",
	strerror(-r));
	return r;
	}

	r = sd_rtnl_message_append_u8(m, IFLA_GRE_TOS, t->tos);
	if (r < 0) {
	log_error_netdev(netdev,
	"Could not append IFLA_GRE_TOS attribute: %s",
	strerror(-r));
	return r;
	}

	return r;
	}

	static int netdev_vti_fill_message_create(NetDev netdev, Link link, sd_rtnl_message *m) {
	Tunnel *t = VTI(netdev);
	int r;

	assert(netdev);
	assert(link);
	assert(m);
	assert(t);
	assert(t->family == AF_INET);

	r = sd_rtnl_message_append_u32(m, IFLA_VTI_LINK, link->ifindex);
	if (r < 0) {
	log_error_netdev(netdev,
	"Could not append IFLA_IPTUN_LINK attribute: %s",
	strerror(-r));
	return r;
	}

	r = sd_rtnl_message_append_in_addr(m, IFLA_VTI_LOCAL, &t->local.in);
	if (r < 0) {
	log_error_netdev(netdev,
	"Could not append IFLA_IPTUN_LOCAL attribute: %s",
	strerror(-r));
	return r;
	}

	r = sd_rtnl_message_append_in_addr(m, IFLA_VTI_REMOTE, &t->remote.in);
	if (r < 0) {
	log_error_netdev(netdev,
	"Could not append IFLA_IPTUN_REMOTE attribute: %s",
	strerror(-r));
	return r;
	}

	return r;
	}

	static int netdev_tunnel_verify(NetDev netdev, const char filename) {
	Tunnel *t = NULL;

	assert(netdev);
	assert(filename);

	switch (netdev->kind) {
	case NETDEV_KIND_IPIP:
	t = IPIP(netdev);
	break;
	case NETDEV_KIND_SIT:
	t = SIT(netdev);
	break;
	case NETDEV_KIND_GRE:
	t = GRE(netdev);
	break;
	case NETDEV_KIND_VTI:
	t = VTI(netdev);
	break;
	default:
	assert_not_reached("Invalid tunnel kind");
	}

	assert(t);

	if (t->local.in.s_addr == INADDR_ANY) {
	log_warning("Tunnel without local address configured in %s. Ignoring", filename);
	return -EINVAL;
	}

	if (t->remote.in.s_addr == INADDR_ANY) {
	log_warning("Tunnel without remote address configured in %s. Ignoring", filename);
	return -EINVAL;
	}

	if (t->family != AF_INET) {
	log_warning("Tunnel with invalid address family configured in %s. Ignoring", filename);
	return -EINVAL;
	}

	return 0;
	}

	int config_parse_tunnel_address(const char *unit,
	const char *filename,
	unsigned line,
	const char *section,
	unsigned section_line,
	const char *lvalue,
	int ltype,
	const char *rvalue,
	void *data,
	void *userdata) {
	Tunnel *t = userdata;
	union in_addr_union *addr = data, buffer;
	int r, f;

	assert(filename);
	assert(lvalue);
	assert(rvalue);
	assert(data);

	r = in_addr_from_string_auto(rvalue, &f, &buffer);
	if (r < 0) {
	log_syntax(unit, LOG_ERR, filename, line, EINVAL, "Tunnel address is invalid, ignoring assignment: %s", rvalue);
	return 0;
	}

	if (t->family != AF_UNSPEC && t->family != f) {
	log_syntax(unit, LOG_ERR, filename, line, EINVAL, "Tunnel addresses incompatible, ignoring assignment: %s", rvalue);
	return 0;
	}

	t->family = f;
	*addr = buffer;

	return 0;
	}

	static void ipip_init(NetDev *n) {
	Tunnel *t = IPIP(n);

	assert(n);
	assert(t);

	t->pmtudisc = true;
	}

	static void sit_init(NetDev *n) {
	Tunnel *t = SIT(n);

	assert(n);
	assert(t);

	t->pmtudisc = true;
	}

	static void vti_init(NetDev *n) {
	Tunnel *t = VTI(n);

	assert(n);
	assert(t);

	t->pmtudisc = true;
	}

	static void gre_init(NetDev *n) {
	Tunnel *t = GRE(n);

	assert(n);
	assert(t);

	t->pmtudisc = true;
	}

	const NetDevVTable ipip_vtable = {
	.object_size = sizeof(Tunnel),
	.init = ipip_init,
	.sections = "Match\0NetDev\0Tunnel\0",
	.fill_message_create = netdev_ipip_fill_message_create,
	.create_type = NETDEV_CREATE_STACKED,
	.config_verify = netdev_tunnel_verify,
	};

	const NetDevVTable sit_vtable = {
	.object_size = sizeof(Tunnel),
	.init = sit_init,
	.sections = "Match\0NetDev\0Tunnel\0",
	.fill_message_create = netdev_sit_fill_message_create,
	.create_type = NETDEV_CREATE_STACKED,
	.config_verify = netdev_tunnel_verify,
	};

	const NetDevVTable vti_vtable = {
	.object_size = sizeof(Tunnel),
	.init = vti_init,
	.sections = "Match\0NetDev\0Tunnel\0",
	.fill_message_create = netdev_vti_fill_message_create,
	.create_type = NETDEV_CREATE_STACKED,
	.config_verify = netdev_tunnel_verify,
	};

	const NetDevVTable gre_vtable = {
	.object_size = sizeof(Tunnel),
	.init = gre_init,
	.sections = "Match\0NetDev\0Tunnel\0",
	.fill_message_create = netdev_gre_fill_message_create,
	.create_type = NETDEV_CREATE_STACKED,
	.config_verify = netdev_tunnel_verify,
	};