diff options
Diffstat (limited to 'src/grp-network/networkd-netdev-tunnel.c')
| -rw-r--r-- | src/grp-network/networkd-netdev-tunnel.c | 650 |
1 files changed, 650 insertions, 0 deletions
diff --git a/src/grp-network/networkd-netdev-tunnel.c b/src/grp-network/networkd-netdev-tunnel.c new file mode 100644 index 0000000000..26a9a972f1 --- /dev/null +++ b/src/grp-network/networkd-netdev-tunnel.c @@ -0,0 +1,650 @@ +/*** + This file is part of systemd. + + Copyright 2014 Susant Sahani + + 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 <arpa/inet.h> +#include <net/if.h> +#include <linux/ip.h> +#include <linux/if_tunnel.h> +#include <linux/ip6_tunnel.h> + +#include <systemd/sd-netlink.h> + +#include "conf-parser.h" +#include "missing.h" +#include "networkd-link.h" +#include "networkd-netdev-tunnel.h" +#include "parse-util.h" +#include "string-table.h" +#include "string-util.h" +#include "util.h" + +#define DEFAULT_TNL_HOP_LIMIT 64 +#define IP6_FLOWINFO_FLOWLABEL htonl(0x000FFFFF) + +static const char* const ip6tnl_mode_table[_NETDEV_IP6_TNL_MODE_MAX] = { + [NETDEV_IP6_TNL_MODE_IP6IP6] = "ip6ip6", + [NETDEV_IP6_TNL_MODE_IPIP6] = "ipip6", + [NETDEV_IP6_TNL_MODE_ANYIP6] = "any", +}; + +DEFINE_STRING_TABLE_LOOKUP(ip6tnl_mode, Ip6TnlMode); +DEFINE_CONFIG_PARSE_ENUM(config_parse_ip6tnl_mode, ip6tnl_mode, Ip6TnlMode, "Failed to parse ip6 tunnel Mode"); + +static int netdev_ipip_fill_message_create(NetDev *netdev, Link *link, sd_netlink_message *m) { + Tunnel *t = IPIP(netdev); + int r; + + assert(netdev); + assert(link); + assert(m); + assert(t); + assert(IN_SET(t->family, AF_INET, AF_UNSPEC)); + + r = sd_netlink_message_append_u32(m, IFLA_IPTUN_LINK, link->ifindex); + if (r < 0) + return log_netdev_error_errno(netdev, r, "Could not append IFLA_IPTUN_LINK attribute: %m"); + + r = sd_netlink_message_append_in_addr(m, IFLA_IPTUN_LOCAL, &t->local.in); + if (r < 0) + return log_netdev_error_errno(netdev, r, "Could not append IFLA_IPTUN_LOCAL attribute: %m"); + + r = sd_netlink_message_append_in_addr(m, IFLA_IPTUN_REMOTE, &t->remote.in); + if (r < 0) + return log_netdev_error_errno(netdev, r, "Could not append IFLA_IPTUN_REMOTE attribute: %m"); + + r = sd_netlink_message_append_u8(m, IFLA_IPTUN_TTL, t->ttl); + if (r < 0) + return log_netdev_error_errno(netdev, r, "Could not append IFLA_IPTUN_TTL attribute: %m"); + + r = sd_netlink_message_append_u8(m, IFLA_IPTUN_PMTUDISC, t->pmtudisc); + if (r < 0) + return log_netdev_error_errno(netdev, r, "Could not append IFLA_IPTUN_PMTUDISC attribute: %m"); + + return r; +} + +static int netdev_sit_fill_message_create(NetDev *netdev, Link *link, sd_netlink_message *m) { + Tunnel *t = SIT(netdev); + int r; + + assert(netdev); + assert(link); + assert(m); + assert(t); + assert(IN_SET(t->family, AF_INET, AF_UNSPEC)); + + r = sd_netlink_message_append_u32(m, IFLA_IPTUN_LINK, link->ifindex); + if (r < 0) + return log_netdev_error_errno(netdev, r, "Could not append IFLA_IPTUN_LINK attribute: %m"); + + r = sd_netlink_message_append_in_addr(m, IFLA_IPTUN_LOCAL, &t->local.in); + if (r < 0) + return log_netdev_error_errno(netdev, r, "Could not append IFLA_IPTUN_LOCAL attribute: %m"); + + r = sd_netlink_message_append_in_addr(m, IFLA_IPTUN_REMOTE, &t->remote.in); + if (r < 0) + return log_netdev_error_errno(netdev, r, "Could not append IFLA_IPTUN_REMOTE attribute: %m"); + + r = sd_netlink_message_append_u8(m, IFLA_IPTUN_TTL, t->ttl); + if (r < 0) + return log_netdev_error_errno(netdev, r, "Could not append IFLA_IPTUN_TTL attribute: %m"); + + r = sd_netlink_message_append_u8(m, IFLA_IPTUN_PMTUDISC, t->pmtudisc); + if (r < 0) + return log_netdev_error_errno(netdev, r, "Could not append IFLA_IPTUN_PMTUDISC attribute: %m"); + + return r; +} + +static int netdev_gre_fill_message_create(NetDev *netdev, Link *link, sd_netlink_message *m) { + Tunnel *t; + int r; + + assert(netdev); + + if (netdev->kind == NETDEV_KIND_GRE) + t = GRE(netdev); + else + t = GRETAP(netdev); + + assert(t); + assert(IN_SET(t->family, AF_INET, AF_UNSPEC)); + assert(link); + assert(m); + + r = sd_netlink_message_append_u32(m, IFLA_GRE_LINK, link->ifindex); + if (r < 0) + return log_netdev_error_errno(netdev, r, "Could not append IFLA_GRE_LINK attribute: %m"); + + r = sd_netlink_message_append_in_addr(m, IFLA_GRE_LOCAL, &t->local.in); + if (r < 0) + return log_netdev_error_errno(netdev, r, "Could not append IFLA_GRE_LOCAL attribute: %m"); + + r = sd_netlink_message_append_in_addr(m, IFLA_GRE_REMOTE, &t->remote.in); + if (r < 0) + log_netdev_error_errno(netdev, r, "Could not append IFLA_GRE_REMOTE attribute: %m"); + + r = sd_netlink_message_append_u8(m, IFLA_GRE_TTL, t->ttl); + if (r < 0) + return log_netdev_error_errno(netdev, r, "Could not append IFLA_GRE_TTL attribute: %m"); + + r = sd_netlink_message_append_u8(m, IFLA_GRE_TOS, t->tos); + if (r < 0) + log_netdev_error_errno(netdev, r, "Could not append IFLA_GRE_TOS attribute: %m"); + + r = sd_netlink_message_append_u8(m, IFLA_GRE_PMTUDISC, t->pmtudisc); + if (r < 0) + return log_netdev_error_errno(netdev, r, "Could not append IFLA_GRE_PMTUDISC attribute: %m"); + + return r; +} + +static int netdev_ip6gre_fill_message_create(NetDev *netdev, Link *link, sd_netlink_message *m) { + Tunnel *t; + int r; + + assert(netdev); + + if (netdev->kind == NETDEV_KIND_IP6GRE) + t = IP6GRE(netdev); + else + t = IP6GRETAP(netdev); + + assert(t); + assert(t->family == AF_INET6); + assert(link); + assert(m); + + r = sd_netlink_message_append_u32(m, IFLA_GRE_LINK, link->ifindex); + if (r < 0) + return log_netdev_error_errno(netdev, r, "Could not append IFLA_GRE_LINK attribute: %m"); + + r = sd_netlink_message_append_in6_addr(m, IFLA_GRE_LOCAL, &t->local.in6); + if (r < 0) + return log_netdev_error_errno(netdev, r, "Could not append IFLA_GRE_LOCAL attribute: %m"); + + r = sd_netlink_message_append_in6_addr(m, IFLA_GRE_REMOTE, &t->remote.in6); + if (r < 0) + return log_netdev_error_errno(netdev, r, "Could not append IFLA_GRE_REMOTE attribute: %m"); + + r = sd_netlink_message_append_u8(m, IFLA_GRE_TTL, t->ttl); + if (r < 0) + return log_netdev_error_errno(netdev, r, "Could not append IFLA_GRE_TTL attribute: %m"); + + if (t->ipv6_flowlabel != _NETDEV_IPV6_FLOWLABEL_INVALID) { + r = sd_netlink_message_append_u32(m, IFLA_GRE_FLOWINFO, t->ipv6_flowlabel); + if (r < 0) + return log_netdev_error_errno(netdev, r, "Could not append IFLA_GRE_FLOWINFO attribute: %m"); + } + + r = sd_netlink_message_append_u32(m, IFLA_GRE_FLAGS, t->flags); + if (r < 0) + return log_netdev_error_errno(netdev, r, "Could not append IFLA_GRE_FLAGS attribute: %m"); + + return r; +} + +static int netdev_vti_fill_message_create(NetDev *netdev, Link *link, sd_netlink_message *m) { + Tunnel *t = VTI(netdev); + int r; + + assert(netdev); + assert(link); + assert(m); + assert(t); + assert(t->family == AF_INET); + + r = sd_netlink_message_append_u32(m, IFLA_VTI_LINK, link->ifindex); + if (r < 0) + return log_netdev_error_errno(netdev, r, "Could not append IFLA_IPTUN_LINK attribute: %m"); + + r = sd_netlink_message_append_in_addr(m, IFLA_VTI_LOCAL, &t->local.in); + if (r < 0) + return log_netdev_error_errno(netdev, r, "Could not append IFLA_IPTUN_LOCAL attribute: %m"); + + r = sd_netlink_message_append_in_addr(m, IFLA_VTI_REMOTE, &t->remote.in); + if (r < 0) + return log_netdev_error_errno(netdev, r, "Could not append IFLA_IPTUN_REMOTE attribute: %m"); + + return r; +} + +static int netdev_vti6_fill_message_create(NetDev *netdev, Link *link, sd_netlink_message *m) { + Tunnel *t = VTI6(netdev); + int r; + + assert(netdev); + assert(link); + assert(m); + assert(t); + assert(t->family == AF_INET6); + + r = sd_netlink_message_append_u32(m, IFLA_VTI_LINK, link->ifindex); + if (r < 0) + return log_netdev_error_errno(netdev, r, "Could not append IFLA_IPTUN_LINK attribute: %m"); + + r = sd_netlink_message_append_in6_addr(m, IFLA_VTI_LOCAL, &t->local.in6); + if (r < 0) + return log_netdev_error_errno(netdev, r, "Could not append IFLA_IPTUN_LOCAL attribute: %m"); + + r = sd_netlink_message_append_in6_addr(m, IFLA_VTI_REMOTE, &t->remote.in6); + if (r < 0) + return log_netdev_error_errno(netdev, r, "Could not append IFLA_IPTUN_REMOTE attribute: %m"); + + return r; +} + +static int netdev_ip6tnl_fill_message_create(NetDev *netdev, Link *link, sd_netlink_message *m) { + Tunnel *t = IP6TNL(netdev); + uint8_t proto; + int r; + + assert(netdev); + assert(link); + assert(m); + assert(t); + assert(t->family == AF_INET6); + + r = sd_netlink_message_append_u32(m, IFLA_IPTUN_LINK, link->ifindex); + if (r < 0) + return log_netdev_error_errno(netdev, r, "Could not append IFLA_IPTUN_LINK attribute: %m"); + + r = sd_netlink_message_append_in6_addr(m, IFLA_IPTUN_LOCAL, &t->local.in6); + if (r < 0) + return log_netdev_error_errno(netdev, r, "Could not append IFLA_IPTUN_LOCAL attribute: %m"); + + r = sd_netlink_message_append_in6_addr(m, IFLA_IPTUN_REMOTE, &t->remote.in6); + if (r < 0) + return log_netdev_error_errno(netdev, r, "Could not append IFLA_IPTUN_REMOTE attribute: %m"); + + r = sd_netlink_message_append_u8(m, IFLA_IPTUN_TTL, t->ttl); + if (r < 0) + return log_netdev_error_errno(netdev, r, "Could not append IFLA_IPTUN_TTL attribute: %m"); + + if (t->ipv6_flowlabel != _NETDEV_IPV6_FLOWLABEL_INVALID) { + r = sd_netlink_message_append_u32(m, IFLA_IPTUN_FLOWINFO, t->ipv6_flowlabel); + if (r < 0) + return log_netdev_error_errno(netdev, r, "Could not append IFLA_IPTUN_FLOWINFO attribute: %m"); + } + + if (t->copy_dscp) + t->flags |= IP6_TNL_F_RCV_DSCP_COPY; + + if (t->encap_limit != IPV6_DEFAULT_TNL_ENCAP_LIMIT) { + r = sd_netlink_message_append_u8(m, IFLA_IPTUN_ENCAP_LIMIT, t->encap_limit); + if (r < 0) + return log_netdev_error_errno(netdev, r, "Could not append IFLA_IPTUN_ENCAP_LIMIT attribute: %m"); + } + + r = sd_netlink_message_append_u32(m, IFLA_IPTUN_FLAGS, t->flags); + if (r < 0) + return log_netdev_error_errno(netdev, r, "Could not append IFLA_IPTUN_FLAGS attribute: %m"); + + switch (t->ip6tnl_mode) { + case NETDEV_IP6_TNL_MODE_IP6IP6: + proto = IPPROTO_IPV6; + break; + case NETDEV_IP6_TNL_MODE_IPIP6: + proto = IPPROTO_IPIP; + break; + case NETDEV_IP6_TNL_MODE_ANYIP6: + default: + proto = 0; + break; + } + + r = sd_netlink_message_append_u8(m, IFLA_IPTUN_PROTO, proto); + if (r < 0) + return log_netdev_error_errno(netdev, r, "Could not append IFLA_IPTUN_MODE attribute: %m"); + + 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_GRETAP: + t = GRETAP(netdev); + break; + case NETDEV_KIND_IP6GRE: + t = IP6GRE(netdev); + break; + case NETDEV_KIND_IP6GRETAP: + t = IP6GRETAP(netdev); + break; + case NETDEV_KIND_VTI: + t = VTI(netdev); + break; + case NETDEV_KIND_VTI6: + t = VTI6(netdev); + break; + case NETDEV_KIND_IP6TNL: + t = IP6TNL(netdev); + break; + default: + assert_not_reached("Invalid tunnel kind"); + } + + assert(t); + + if (t->family != AF_INET && t->family != AF_INET6 && t->family != 0) { + log_warning("Tunnel with invalid address family configured in %s. Ignoring", filename); + return -EINVAL; + } + + if (netdev->kind == NETDEV_KIND_IP6TNL) { + if (t->ip6tnl_mode == _NETDEV_IP6_TNL_MODE_INVALID) { + log_warning("IP6 Tunnel without mode 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); + + if (streq(rvalue, "any")) { + t->family = 0; + return 0; + } else { + + r = in_addr_from_string_auto(rvalue, &f, &buffer); + if (r < 0) { + log_syntax(unit, LOG_ERR, filename, line, r, "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, 0, "Tunnel addresses incompatible, ignoring assignment: %s", rvalue); + return 0; + } + } + + t->family = f; + *addr = buffer; + + return 0; +} + +int config_parse_ipv6_flowlabel(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) { + IPv6FlowLabel *ipv6_flowlabel = data; + Tunnel *t = userdata; + int k = 0; + int r; + + assert(filename); + assert(lvalue); + assert(rvalue); + assert(ipv6_flowlabel); + + if (streq(rvalue, "inherit")) { + *ipv6_flowlabel = IP6_FLOWINFO_FLOWLABEL; + t->flags |= IP6_TNL_F_USE_ORIG_FLOWLABEL; + } else { + r = config_parse_int(unit, filename, line, section, section_line, lvalue, ltype, rvalue, &k, userdata); + if (r < 0) + return r; + + if (k > 0xFFFFF) + log_syntax(unit, LOG_ERR, filename, line, 0, "Failed to parse IPv6 flowlabel option, ignoring: %s", rvalue); + else { + *ipv6_flowlabel = htonl(k) & IP6_FLOWINFO_FLOWLABEL; + t->flags &= ~IP6_TNL_F_USE_ORIG_FLOWLABEL; + } + } + + return 0; +} + +int config_parse_encap_limit(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; + int k = 0; + int r; + + assert(filename); + assert(lvalue); + assert(rvalue); + + if (streq(rvalue, "none")) + t->flags |= IP6_TNL_F_IGN_ENCAP_LIMIT; + else { + r = safe_atoi(rvalue, &k); + if (r < 0) { + log_syntax(unit, LOG_ERR, filename, line, r, "Failed to parse Tunnel Encapsulation Limit option, ignoring: %s", rvalue); + return 0; + } + + if (k > 255 || k < 0) + log_syntax(unit, LOG_ERR, filename, line, 0, "Invalid Tunnel Encapsulation value, ignoring: %d", k); + else { + t->encap_limit = k; + t->flags &= ~IP6_TNL_F_IGN_ENCAP_LIMIT; + } + } + + return 0; +} + +static void ipip_init(NetDev *n) { + Tunnel *t = IPIP(n); + + assert(n); + assert(t); + + t->pmtudisc = true; + t->family = AF_UNSPEC; +} + +static void sit_init(NetDev *n) { + Tunnel *t = SIT(n); + + assert(n); + assert(t); + + t->pmtudisc = true; + t->family = AF_UNSPEC; +} + +static void vti_init(NetDev *n) { + Tunnel *t; + + assert(n); + + if (n->kind == NETDEV_KIND_VTI) + t = VTI(n); + else + t = VTI6(n); + + assert(t); + + t->pmtudisc = true; +} + +static void gre_init(NetDev *n) { + Tunnel *t; + + assert(n); + + if (n->kind == NETDEV_KIND_GRE) + t = GRE(n); + else + t = GRETAP(n); + + assert(t); + + t->pmtudisc = true; + t->family = AF_UNSPEC; +} + +static void ip6gre_init(NetDev *n) { + Tunnel *t; + + assert(n); + + if (n->kind == NETDEV_KIND_IP6GRE) + t = IP6GRE(n); + else + t = IP6GRETAP(n); + + assert(t); + + t->ttl = DEFAULT_TNL_HOP_LIMIT; +} + +static void ip6tnl_init(NetDev *n) { + Tunnel *t = IP6TNL(n); + + assert(n); + assert(t); + + t->ttl = DEFAULT_TNL_HOP_LIMIT; + t->encap_limit = IPV6_DEFAULT_TNL_ENCAP_LIMIT; + t->ip6tnl_mode = _NETDEV_IP6_TNL_MODE_INVALID; + t->ipv6_flowlabel = _NETDEV_IPV6_FLOWLABEL_INVALID; +} + +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 vti6_vtable = { + .object_size = sizeof(Tunnel), + .init = vti_init, + .sections = "Match\0NetDev\0Tunnel\0", + .fill_message_create = netdev_vti6_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, +}; + +const NetDevVTable gretap_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, +}; + +const NetDevVTable ip6gre_vtable = { + .object_size = sizeof(Tunnel), + .init = ip6gre_init, + .sections = "Match\0NetDev\0Tunnel\0", + .fill_message_create = netdev_ip6gre_fill_message_create, + .create_type = NETDEV_CREATE_STACKED, + .config_verify = netdev_tunnel_verify, +}; + +const NetDevVTable ip6gretap_vtable = { + .object_size = sizeof(Tunnel), + .init = ip6gre_init, + .sections = "Match\0NetDev\0Tunnel\0", + .fill_message_create = netdev_ip6gre_fill_message_create, + .create_type = NETDEV_CREATE_STACKED, + .config_verify = netdev_tunnel_verify, +}; + +const NetDevVTable ip6tnl_vtable = { + .object_size = sizeof(Tunnel), + .init = ip6tnl_init, + .sections = "Match\0NetDev\0Tunnel\0", + .fill_message_create = netdev_ip6tnl_fill_message_create, + .create_type = NETDEV_CREATE_STACKED, + .config_verify = netdev_tunnel_verify, +}; |