From: Kristof Provost <k...@freebsd.org>
Implement data-channel offload for FreeBSD. The implementation and flow
is very similar to that of the Linux DCO support.
Signed-off-by: Kristof Provost <kprov...@netgate.com>
---
configure.ac | 5 +
src/openvpn/Makefile.am | 1 +
src/openvpn/dco_freebsd.c | 636 +++++++++++++++++++++++++++++++++
src/openvpn/dco_freebsd.h | 59 +++
src/openvpn/dco_internal.h | 1 +
src/openvpn/forward.c | 8 +-
src/openvpn/mtcp.c | 4 +-
src/openvpn/mudp.c | 2 +-
src/openvpn/multi.c | 4 +-
src/openvpn/options.c | 8 +-
src/openvpn/options.h | 4 +-
src/openvpn/ovpn_dco_freebsd.h | 64 ++++
src/openvpn/tun.c | 38 +-
src/openvpn/tun.h | 6 +
14 files changed, 808 insertions(+), 32 deletions(-)
create mode 100644 src/openvpn/dco_freebsd.c
create mode 100644 src/openvpn/dco_freebsd.h
create mode 100644 src/openvpn/ovpn_dco_freebsd.h
diff --git a/configure.ac b/configure.ac
index 353da08c..ed1332da 100644
--- a/configure.ac
+++ b/configure.ac
@@ -787,6 +787,11 @@ dnl
AC_DEFINE(ENABLE_DCO, 1, [Enable shared data channel
offload])
AC_MSG_NOTICE([Enabled ovpn-dco support for Linux])
;;
+ *-*-freebsd*)
+ LIBS="${LIBS} -lnv"
+ AC_DEFINE(ENABLE_DCO, 1, [Enable data channel offload
for FreeBSD])
+ AC_MSG_NOTICE([Enabled ovpn-dco support for FreeBSD])
+ ;;
*)
AC_MSG_NOTICE([Ignoring --enable-dco on non Linux
platform])
;;
diff --git a/src/openvpn/Makefile.am b/src/openvpn/Makefile.am
index aaa1dbce..2a139b23 100644
--- a/src/openvpn/Makefile.am
+++ b/src/openvpn/Makefile.am
@@ -54,6 +54,7 @@ openvpn_SOURCES = \
crypto_openssl.c crypto_openssl.h \
crypto_mbedtls.c crypto_mbedtls.h \
dco.c dco.h dco_internal.h \
+ dco_freebsd.c dco_freebsd.h \
dco_linux.c dco_linux.h \
dhcp.c dhcp.h \
dns.c dns.h \
diff --git a/src/openvpn/dco_freebsd.c b/src/openvpn/dco_freebsd.c
new file mode 100644
index 00000000..a8a53fe3
--- /dev/null
+++ b/src/openvpn/dco_freebsd.c
@@ -0,0 +1,636 @@
+/*
+ * Interface to FreeBSD dco networking code
+ *
+ * Copyright (C) 2022 Rubicon Communications, LLC (Netgate). All Rights
Reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2
+ * as published by the Free Software Foundation.
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program (see the file COPYING included with this
+ * distribution); if not, write to the Free Software Foundation, Inc.,
+ * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#elif defined(_MSC_VER)
+#include "config-msvc.h"
+#endif
+
+#if defined(ENABLE_DCO) && defined(TARGET_FREEBSD)
+
+#include "syshead.h"
+
+#include <sys/param.h>
+#include <sys/linker.h>
+#include <sys/nv.h>
+#include <netinet/in.h>
+
+#include "dco_freebsd.h"
+#include "dco.h"
+#include "tun.h"
+#include "crypto.h"
+#include "ssl_common.h"
+
+static nvlist_t *
+sockaddr_to_nvlist(const struct sockaddr *sa)
+{
+ nvlist_t *nvl = nvlist_create(0);
+
+ nvlist_add_number(nvl, "af", sa->sa_family);
+
+ switch (sa->sa_family)
+ {
+ case AF_INET:
+ {
+ const struct sockaddr_in *in = (const struct sockaddr_in *)sa;
+ nvlist_add_binary(nvl, "address", &in->sin_addr,
sizeof(in->sin_addr));
+ nvlist_add_number(nvl, "port", in->sin_port);
+ break;
+ }
+
+ case AF_INET6:
+ {
+ const struct sockaddr_in6 *in6 = (const struct sockaddr_in6 *)sa;
+ nvlist_add_binary(nvl, "address", &in6->sin6_addr,
sizeof(in6->sin6_addr));
+ nvlist_add_number(nvl, "port", in6->sin6_port);
+ break;
+ }
+
+ default:
+ abort();
+ }
+
+ return (nvl);
+}
+
+int
+dco_new_peer(dco_context_t *dco, unsigned int peerid, int sd,
+ struct sockaddr *localaddr, struct sockaddr *remoteaddr,
+ struct in_addr *remote_in4, struct in6_addr *remote_in6)
+{
+ struct ifdrv drv;
+ nvlist_t *nvl;
+ int ret;
+
+ nvl = nvlist_create(0);
+
+ msg(D_DCO_DEBUG, "%s: peer-id %d, fd %d", __func__, peerid, sd);
+
+ if (localaddr)
+ {
+ nvlist_add_nvlist(nvl, "local", sockaddr_to_nvlist(localaddr));
+ }
+
+ if (remoteaddr)
+ {
+ nvlist_add_nvlist(nvl, "remote", sockaddr_to_nvlist(remoteaddr));
+ }
+
+ if (remote_in4)
+ {
+ nvlist_add_binary(nvl, "vpn_ipv4", &remote_in4->s_addr,
+ sizeof(remote_in4->s_addr));
+ }
+
+ if (remote_in6)
+ {
+ nvlist_add_binary(nvl, "vpn_ipv6", remote_in6, sizeof(*remote_in6));
+ }
+
+ nvlist_add_number(nvl, "fd", sd);
+ nvlist_add_number(nvl, "peerid", peerid);
+
+ bzero(&drv, sizeof(drv));
+ snprintf(drv.ifd_name, IFNAMSIZ, "%s", dco->ifname);
+ drv.ifd_cmd = OVPN_NEW_PEER;
+ drv.ifd_data = nvlist_pack(nvl, &drv.ifd_len);
+
+ ret = ioctl(dco->fd, SIOCSDRVSPEC, &drv);
+ free(drv.ifd_data);
+ nvlist_destroy(nvl);
+ if (ret)
+ {
+ msg(D_DCO, "Failed to create new peer %d", errno);
+ return ret;
+ }
+
+ return 0;
+}
+
+static int
+open_fd(dco_context_t *dco)
+{
+ int ret;
+
+ ret = pipe2(dco->pipefd, O_CLOEXEC | O_NONBLOCK);
+ if (ret != 0)
+ {
+ return -1;
+ }
+
+ dco->fd = socket(AF_INET, SOCK_DGRAM | SOCK_CLOEXEC, 0);
+ if (dco->fd != -1)
+ {
+ dco->open = true;
+ }
+ dco->dco_packet_in = alloc_buf(PAGE_SIZE);
+
+ return dco->fd;
+}
+
+static void
+close_fd(dco_context_t *dco)
+{
+ close(dco->pipefd[0]);
+ close(dco->pipefd[1]);
+ close(dco->fd);
+}
+
+bool
+ovpn_dco_init(int mode, dco_context_t *dco)
+{
+ if (open_fd(dco) < 0)
+ {
+ msg(D_DCO, "Failed to open socket");
+ return false;
+ }
+ return true;
+}
+
+static int
+create_interface(struct tuntap *tt, const char *dev)
+{
+ int ret;
+ struct ifreq ifr;
+
+ bzero(&ifr, sizeof(ifr));
+
+ /* Create ovpnx first, then rename it. */
+ snprintf(ifr.ifr_name, IFNAMSIZ, "ovpn");
+ ret = ioctl(tt->dco.fd, SIOCIFCREATE2, &ifr);
+ if (ret)
+ {
+ msg(D_DCO, "Failed to create interface %s: %d", ifr.ifr_name, errno);
+ return ret;
+ }
+
+ /* Rename */
+ if (!strcmp(dev, "tun"))
+ {
+ ifr.ifr_data = "ovpn";
+ }
+ else
+ {
+ ifr.ifr_data = (char *)dev;
+ }
+ ret = ioctl(tt->dco.fd, SIOCSIFNAME, &ifr);
+ if (ret)
+ {
+ /* Delete the created interface again. */
+ (void)ioctl(tt->dco.fd, SIOCIFDESTROY, &ifr);
+ msg(D_DCO, "Failed to create interface %s: %d", ifr.ifr_data, errno);
+ return ret;
+ }
+
+ snprintf(tt->dco.ifname, IFNAMSIZ, "%s", ifr.ifr_data);
+ tt->actual_name = string_alloc(tt->dco.ifname, NULL);
+
+ return 0;
+}
+
+static int
+remove_interface(struct tuntap *tt)
+{
+ int ret;
+ struct ifreq ifr;
+
+ bzero(&ifr, sizeof(ifr));
+ snprintf(ifr.ifr_name, IFNAMSIZ, "%s", tt->dco.ifname);
+
+ ret = ioctl(tt->dco.fd, SIOCIFDESTROY, &ifr);
+ if (ret)
+ {
+ msg(D_DCO, "Failed to remove interface %s: %d", ifr.ifr_name, errno);
+ return ret;
+ }
+
+ tt->dco.ifname[0] = 0;
+
+ return 0;
+}
+
+int
+open_tun_dco(struct tuntap *tt, openvpn_net_ctx_t *ctx, const char *dev)
+{
+ int ret;
+
+ ret = create_interface(tt, dev);
+
+ if (ret < 0)
+ {
+ msg(D_DCO, "Failed to create interface");
+ }
+
+ return ret;
+}
+
+void
+close_tun_dco(struct tuntap *tt, openvpn_net_ctx_t *ctx)
+{
+ remove_interface(tt);
+ close_fd(&tt->dco);
+}
+
+int
+dco_swap_keys(dco_context_t *dco, unsigned int peerid)
+{
+ struct ifdrv drv;
+ nvlist_t *nvl;
+ int ret;
+
+ msg(D_DCO_DEBUG, "%s: peer-id %d", __func__, peerid);
+
+ nvl = nvlist_create(0);
+ nvlist_add_number(nvl, "peerid", peerid);
+
+ bzero(&drv, sizeof(drv));
+ snprintf(drv.ifd_name, IFNAMSIZ, "%s", dco->ifname);
+ drv.ifd_cmd = OVPN_SWAP_KEYS;
+ drv.ifd_data = nvlist_pack(nvl, &drv.ifd_len);
+
+ ret = ioctl(dco->fd, SIOCSDRVSPEC, &drv);
+ free(drv.ifd_data);
+ nvlist_destroy(nvl);
+ if (ret)
+ {
+ msg(D_DCO, "Failed to swap keys %d", errno);
+ return ret;
+ }
+
+ return 0;
+}
+
+int
+dco_del_peer(dco_context_t *dco, unsigned int peerid)
+{
+ struct ifdrv drv;
+ nvlist_t *nvl;
+ int ret;
+
+ nvl = nvlist_create(0);
+ nvlist_add_number(nvl, "peerid", peerid);
+
+ bzero(&drv, sizeof(drv));
+ snprintf(drv.ifd_name, IFNAMSIZ, "%s", dco->ifname);
+ drv.ifd_cmd = OVPN_DEL_PEER;
+ drv.ifd_data = nvlist_pack(nvl, &drv.ifd_len);
+
+ ret = ioctl(dco->fd, SIOCSDRVSPEC, &drv);
+ free(drv.ifd_data);
+ nvlist_destroy(nvl);
+ if (ret)
+ {
+ msg(D_DCO, "Failed to delete peer %d", errno);
+ return ret;
+ }
+
+ return 0;
+}
+
+int
+dco_del_key(dco_context_t *dco, unsigned int peerid,
+ dco_key_slot_t slot)
+{
+ struct ifdrv drv;
+ nvlist_t *nvl;
+ int ret;
+
+ msg(D_DCO, "%s: peer-id %d, slot %d", __func__, peerid, slot);
+
+ nvl = nvlist_create(0);
+ nvlist_add_number(nvl, "slot", slot);
+ nvlist_add_number(nvl, "peerid", peerid);
+
+ bzero(&drv, sizeof(drv));
+ snprintf(drv.ifd_name, IFNAMSIZ, "%s", dco->ifname);
+ drv.ifd_cmd = OVPN_DEL_KEY;
+ drv.ifd_data = nvlist_pack(nvl, &drv.ifd_len);
+
+ ret = ioctl(dco->fd, SIOCSDRVSPEC, &drv);
+ free(drv.ifd_data);
+ nvlist_destroy(nvl);
+ if (ret)
+ {
+ msg(D_DCO, "Failed to delete key %d", errno);
+ return ret;
+ }
+
+ return 0;
+}
+
+static nvlist_t *
+key_to_nvlist(const uint8_t *key, const uint8_t *implicit_iv, const char
*ciphername)
+{
+ nvlist_t *nvl;
+ size_t key_len;
+
+ nvl = nvlist_create(0);
+
+ nvlist_add_string(nvl, "cipher", ciphername);
+
+ if (strcmp(ciphername, "none") != 0)
+ {
+ key_len = cipher_kt_key_size(ciphername);
+
+ nvlist_add_binary(nvl, "key", key, key_len);
+ nvlist_add_binary(nvl, "iv", implicit_iv, 8);
+ }
+
+ return (nvl);
+}
+
+static int
+start_tun(dco_context_t *dco)
+{
+ struct ifdrv drv;
+ int ret;
+
+ bzero(&drv, sizeof(drv));
+ snprintf(drv.ifd_name, IFNAMSIZ, "%s", dco->ifname);
+ drv.ifd_cmd = OVPN_START_VPN;
+
+ ret = ioctl(dco->fd, SIOCSDRVSPEC, &drv);
+ if (ret)
+ {
+ msg(D_DCO, "Failed to start vpn %d", errno);
+ return ret;
+ }
+
+ return 0;
+}
+
+int
+dco_new_key(dco_context_t *dco, unsigned int peerid, int keyid,
+ dco_key_slot_t slot,
+ const uint8_t *encrypt_key, const uint8_t *encrypt_iv,
+ const uint8_t *decrypt_key, const uint8_t *decrypt_iv,
+ const char *ciphername)
+{
+ struct ifdrv drv;
+ nvlist_t *nvl;
+ int ret;
+
+ msg(D_DCO_DEBUG, "%s: slot %d, key-id %d, peer-id %d, cipher %s",
+ __func__, slot, keyid, peerid, ciphername);
+
+ nvl = nvlist_create(0);
+
+ nvlist_add_number(nvl, "slot", slot);
+ nvlist_add_number(nvl, "keyid", keyid);
+ nvlist_add_number(nvl, "peerid", peerid);
+
+ nvlist_add_nvlist(nvl, "encrypt",
+ key_to_nvlist(encrypt_key, encrypt_iv, ciphername));
+ nvlist_add_nvlist(nvl, "decrypt",
+ key_to_nvlist(decrypt_key, decrypt_iv, ciphername));
+
+ bzero(&drv, sizeof(drv));
+ snprintf(drv.ifd_name, IFNAMSIZ, "%s", dco->ifname);
+ drv.ifd_cmd = OVPN_NEW_KEY;
+ drv.ifd_data = nvlist_pack(nvl, &drv.ifd_len);
+
+ ret = ioctl(dco->fd, SIOCSDRVSPEC, &drv);
+ free(drv.ifd_data);
+ nvlist_destroy(nvl);
+ if (ret)
+ {
+ msg(D_DCO, "Failed to set key %d", errno);
+ return ret;
+ }
+
+ return start_tun(dco);
+}
+
+int
+dco_set_peer(dco_context_t *dco, unsigned int peerid,
+ int keepalive_interval, int keepalive_timeout,
+ int mss)
+{
+ struct ifdrv drv;
+ nvlist_t *nvl;
+ int ret;
+
+ nvl = nvlist_create(0);
+ nvlist_add_number(nvl, "peerid", peerid);
+ nvlist_add_number(nvl, "interval", keepalive_interval);
+ nvlist_add_number(nvl, "timeout", keepalive_timeout);
+
+ bzero(&drv, sizeof(drv));
+ snprintf(drv.ifd_name, IFNAMSIZ, "%s", dco->ifname);
+ drv.ifd_cmd = OVPN_SET_PEER;
+ drv.ifd_data = nvlist_pack(nvl, &drv.ifd_len);
+
+ ret = ioctl(dco->fd, SIOCSDRVSPEC, &drv);
+ free(drv.ifd_data);
+ nvlist_destroy(nvl);
+ if (ret)
+ {
+ msg(D_DCO, "Failed to set keepalive %d", errno);
+ return ret;
+ }
+
+ return 0;
+}
+
+int
+dco_do_read(dco_context_t *dco)
+{
+ struct ifdrv drv;
+ uint8_t buf[4096];
+ nvlist_t *nvl;
+ const uint8_t *pkt;
+ size_t pktlen;
+ int ret;
+
+ /* Flush any pending data from the pipe. */
+ (void)read(dco->pipefd[1], buf, sizeof(buf));
+
+ bzero(&drv, sizeof(drv));
+ snprintf(drv.ifd_name, IFNAMSIZ, "%s", dco->ifname);
+ drv.ifd_cmd = OVPN_GET_PKT;
+ drv.ifd_data = buf;
+ drv.ifd_len = sizeof(buf);
+
+ ret = ioctl(dco->fd, SIOCGDRVSPEC, &drv);
+ if (ret)
+ {
+ msg(D_DCO, "Failed to read control packet %d", errno);
+ return errno;
+ }
+
+ nvl = nvlist_unpack(buf, drv.ifd_len, 0);
+ if (!nvl)
+ {
+ msg(D_DCO, "Failed to unpack nvlist");
+ return EINVAL;
+ }
+
+ dco->dco_message_peer_id = nvlist_get_number(nvl, "peerid");
+
+ if (nvlist_exists_binary(nvl, "packet"))
+ {
+ pkt = nvlist_get_binary(nvl, "packet", &pktlen);
+ memcpy(BPTR(&dco->dco_packet_in), pkt, pktlen);
+ dco->dco_packet_in.len = pktlen;
+ dco->dco_message_type = OVPN_CMD_PACKET;
+ }
+ else
+ {
+ dco->dco_del_peer_reason = OVPN_DEL_PEER_REASON_EXPIRED;
+ dco->dco_message_type = OVPN_CMD_DEL_PEER;
+ }
+
+ nvlist_destroy(nvl);
+
+ return 0;
+}
+
+int
+dco_do_write(dco_context_t *dco, int peer_id, struct buffer *buf)
+{
+ struct ifdrv drv;
+ nvlist_t *nvl;
+ int ret;
+
+ nvl = nvlist_create(0);
+
+ nvlist_add_binary(nvl, "packet", BSTR(buf), BLEN(buf));
+ nvlist_add_number(nvl, "peerid", peer_id);
+
+ bzero(&drv, sizeof(drv));
+ snprintf(drv.ifd_name, IFNAMSIZ, "%s", dco->ifname);
+ drv.ifd_cmd = OVPN_SEND_PKT;
+ drv.ifd_data = nvlist_pack(nvl, &drv.ifd_len);
+
+ ret = ioctl(dco->fd, SIOCSDRVSPEC, &drv);
+ free(drv.ifd_data);
+ nvlist_destroy(nvl);
+ if (ret)
+ {
+ msg(D_DCO, "Failed to send control packet %d", errno);
+ return ret;
+ }
+
+ return BLEN(buf);
+}
+
+bool
+dco_available(int msglevel)
+{
+ struct if_clonereq ifcr;
+ char *buf = NULL;
+ int fd;
+ int ret;
+ bool available = false;
+
+ /* Attempt to load the module. Ignore errors, because it might already be
+ * loaded, or built into the kernel. */
+ (void)kldload("if_ovpn");
+
+ fd = socket(AF_INET, SOCK_DGRAM | SOCK_CLOEXEC, 0);
+ if (fd < 0)
+ {
+ return false;
+ }
+
+ bzero(&ifcr, sizeof(ifcr));
+
+ ret = ioctl(fd, SIOCIFGCLONERS, &ifcr);
+ if (ret != 0)
+ {
+ goto out;
+ }
+
+ buf = malloc(ifcr.ifcr_total * IFNAMSIZ);
+
+ ifcr.ifcr_count = ifcr.ifcr_total;
+ ifcr.ifcr_buffer = buf;
+ ret = ioctl(fd, SIOCIFGCLONERS, &ifcr);
+ if (ret != 0)
+ {
+ goto out;
+ }
+
+ for (int i = 0; i < ifcr.ifcr_total; i++)
+ {
+ if (strcmp(buf + (i * IFNAMSIZ), "openvpn") == 0)
+ {
+ available = true;
+ goto out;
+ }
+ }
+
+out:
+ free(buf);
+ close(fd);
+
+ return available;
+}
+
+void
+dco_event_set(dco_context_t *dco, struct event_set *es, void *arg)
+{
+ struct ifdrv drv;
+ nvlist_t *nvl;
+ uint8_t buf[128];
+ int ret;
+
+ if (!dco || !dco->open)
+ {
+ return;
+ }
+
+ bzero(&drv, sizeof(drv));
+ snprintf(drv.ifd_name, IFNAMSIZ, "%s", dco->ifname);
+ drv.ifd_cmd = OVPN_POLL_PKT;
+ drv.ifd_len = sizeof(buf);
+ drv.ifd_data = buf;
+
+ ret = ioctl(dco->fd, SIOCGDRVSPEC, &drv);
+ if (ret)
+ {
+ msg(D_DCO, "Failed to poll for packets %d", errno);
+ return;
+ }
+
+ nvl = nvlist_unpack(buf, drv.ifd_len, 0);
+ if (!nvl)
+ {
+ msg(D_DCO, "Failed to unpack nvlist");
+ return;
+ }
+
+ if (nvlist_get_number(nvl, "pending") > 0)
+ {
+ (void)write(dco->pipefd[0], " ", 1);
+ event_ctl(es, dco->pipefd[1], EVENT_READ, arg);
+ }
+
+ nvlist_destroy(nvl);
+}
+
+const char *
+dco_get_supported_ciphers()
+{
+ return "none:AES-256-GCM:AES-128-GCM:CHACHA20-POLY1305";
+}
+
+#endif /* defined(ENABLE_DCO) && defined(TARGET_FREEBSD) */
diff --git a/src/openvpn/dco_freebsd.h b/src/openvpn/dco_freebsd.h
new file mode 100644
index 00000000..3594f229
--- /dev/null
+++ b/src/openvpn/dco_freebsd.h
@@ -0,0 +1,59 @@
+/*
+ * Interface to FreeBSD dco networking code
+ *
+ * Copyright (C) 2022 Rubicon Communications, LLC (Netgate). All Rights
Reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2
+ * as published by the Free Software Foundation.
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program (see the file COPYING included with this
+ * distribution); if not, write to the Free Software Foundation, Inc.,
+ * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+#ifndef DCO_FREEBSD_H
+#define DCO_FREEBSD_H
+
+#if defined(ENABLE_DCO) && defined(TARGET_FREEBSD)
+
+#include <buffer.h>
+#include "event.h"
+
+#include "ovpn_dco_freebsd.h"
+
+typedef enum ovpn_key_slot dco_key_slot_t;
+typedef enum ovpn_key_cipher dco_cipher_t;
+
+enum ovpn_message_type_t {
+ OVPN_CMD_DEL_PEER,
+ OVPN_CMD_PACKET,
+};
+
+enum ovpn_del_reason_t {
+ OVPN_DEL_PEER_REASON_EXPIRED,
+ OVPN_DEL_PEER_REASON_TRANSPORT_ERROR,
+ OVPN_DEL_PEER_REASON_USERSPACE,
+};
+
+typedef struct dco_context {
+ bool open;
+ int fd;
+ int pipefd[2];
+
+ char ifname[IFNAMSIZ];
+
+ struct buffer dco_packet_in;
+
+ int dco_message_type;
+ int dco_message_peer_id;
+ int dco_del_peer_reason;
+} dco_context_t;
+
+#endif /* defined(ENABLE_DCO) && defined(TARGET_FREEBSD) */
+#endif /* ifndef DCO_FREEBSD_H */
diff --git a/src/openvpn/dco_internal.h b/src/openvpn/dco_internal.h
index 3ceb26d6..728e3092 100644
--- a/src/openvpn/dco_internal.h
+++ b/src/openvpn/dco_internal.h
@@ -27,6 +27,7 @@
#if defined(ENABLE_DCO)
+#include "dco_freebsd.h"
#include "dco_linux.h"
/**
diff --git a/src/openvpn/forward.c b/src/openvpn/forward.c
index 55c939c4..14ad24fa 100644
--- a/src/openvpn/forward.c
+++ b/src/openvpn/forward.c
@@ -1113,7 +1113,7 @@ process_incoming_link(struct context *c)
static void
process_incoming_dco(struct context *c)
{
-#if defined(ENABLE_DCO) && defined(TARGET_LINUX)
+#if defined(ENABLE_DCO) && (defined(TARGET_LINUX) || defined(TARGET_FREEBSD))
struct link_socket_info *lsi = get_link_socket_info(c);
dco_context_t *dco = &c->c1.tuntap->dco;
@@ -1140,7 +1140,7 @@ process_incoming_dco(struct context *c)
c->c2.buf = orig_buff;
buf_init(&dco->dco_packet_in, 0);
-#endif /* if defined(ENABLE_DCO) && defined(TARGET_LINUX) */
+#endif /* if defined(ENABLE_DCO) && (defined(TARGET_LINUX) ||
defined(TARGET_FREEBSD)) */
}
/*
@@ -1946,7 +1946,7 @@ io_wait_dowork(struct context *c, const unsigned int
flags)
#ifdef ENABLE_ASYNC_PUSH
static int file_shift = FILE_SHIFT;
#endif
-#ifdef TARGET_LINUX
+#if defined(TARGET_LINUX) || defined(TARGET_FREEBSD)
static int dco_shift = DCO_SHIFT; /* Event from DCO linux kernel module
*/
#endif
@@ -2056,7 +2056,7 @@ io_wait_dowork(struct context *c, const unsigned int
flags)
*/
socket_set(c->c2.link_socket, c->c2.event_set, socket, (void
*)&socket_shift, NULL);
tun_set(c->c1.tuntap, c->c2.event_set, tuntap, (void *)&tun_shift, NULL);
-#if defined(TARGET_LINUX)
+#if defined(TARGET_LINUX) || defined(TARGET_FREEBSD)
if (socket & EVENT_READ && c->c2.did_open_tun)
{
dco_event_set(&c->c1.tuntap->dco, c->c2.event_set, (void *)&dco_shift);
diff --git a/src/openvpn/mtcp.c b/src/openvpn/mtcp.c
index eb88a56a..1abb903f 100644
--- a/src/openvpn/mtcp.c
+++ b/src/openvpn/mtcp.c
@@ -283,7 +283,7 @@ multi_tcp_wait(const struct context *c,
}
#endif
tun_set(c->c1.tuntap, mtcp->es, EVENT_READ, MTCP_TUN, persistent);
-#if defined(TARGET_LINUX)
+#if defined(TARGET_LINUX) || defined(TARGET_FREEBSD)
dco_event_set(&c->c1.tuntap->dco, mtcp->es, MTCP_DCO);
#endif
@@ -763,7 +763,7 @@ multi_tcp_process_io(struct multi_context *m)
multi_tcp_action(m, mi, TA_INITIAL, false);
}
}
-#if defined(ENABLE_DCO) && defined(TARGET_LINUX)
+#if defined(ENABLE_DCO) && (defined(TARGET_LINUX) || defined(TARGET_FREEBSD))
/* incoming data on DCO? */
else if (e->arg == MTCP_DCO)
{
diff --git a/src/openvpn/mudp.c b/src/openvpn/mudp.c
index ddb1efc9..4ab18b72 100644
--- a/src/openvpn/mudp.c
+++ b/src/openvpn/mudp.c
@@ -381,7 +381,7 @@ multi_process_io_udp(struct multi_context *m)
multi_process_file_closed(m, mpp_flags);
}
#endif
-#if defined(ENABLE_DCO) && defined(TARGET_LINUX)
+#if defined(ENABLE_DCO) && (defined(TARGET_LINUX) || defined(TARGET_FREEBSD))
else if (status & DCO_READ)
{
if (!IS_SIG(&m->top))
diff --git a/src/openvpn/multi.c b/src/openvpn/multi.c
index dcf4438d..53ee3e1a 100644
--- a/src/openvpn/multi.c
+++ b/src/openvpn/multi.c
@@ -3154,7 +3154,7 @@ multi_close_instance_on_signal(struct multi_context *m,
struct multi_instance *m
multi_close_instance(m, mi, false);
}
-#if (defined(ENABLE_DCO) && defined(TARGET_LINUX)) ||
defined(ENABLE_MANAGEMENT)
+#if (defined(ENABLE_DCO) && (defined(TARGET_LINUX) ||
defined(TARGET_FREEBSD))) || defined(ENABLE_MANAGEMENT)
static void
multi_signal_instance(struct multi_context *m, struct multi_instance *mi,
const int sig)
{
@@ -3163,7 +3163,7 @@ multi_signal_instance(struct multi_context *m, struct
multi_instance *mi, const
}
#endif
-#if defined(ENABLE_DCO) && defined(TARGET_LINUX)
+#if defined(ENABLE_DCO) && (defined(TARGET_LINUX) || defined(TARGET_FREEBSD))
static void
process_incoming_dco_packet(struct multi_context *m, struct multi_instance *mi,
dco_context_t *dco)
diff --git a/src/openvpn/options.c b/src/openvpn/options.c
index 0ce3158b..14cb4cc4 100644
--- a/src/openvpn/options.c
+++ b/src/openvpn/options.c
@@ -183,7 +183,7 @@ static const char usage_message[] =
" does not begin with \"tun\" or \"tap\".\n"
"--dev-node node : Explicitly set the device node rather than using\n"
" /dev/net/tun, /dev/tun, /dev/tap, etc.\n"
-#if defined(ENABLE_DCO) && defined(TARGET_LINUX)
+#if defined(ENABLE_DCO) && (defined(TARGET_LINUX) || defined(TARGET_FREEBSD))
"--disable-dco : Do not attempt using Data Channel Offload.\n"
#endif
"--lladdr hw : Set the link layer address of the tap device.\n"
@@ -1794,7 +1794,7 @@ show_settings(const struct options *o)
SHOW_STR(dev);
SHOW_STR(dev_type);
SHOW_STR(dev_node);
-#if defined(ENABLE_DCO) && defined(TARGET_LINUX)
+#if defined(ENABLE_DCO) && (defined(TARGET_LINUX) || defined(TARGET_FREEBSD))
SHOW_BOOL(tuntap_options.disable_dco);
#endif
SHOW_STR(lladdr);
@@ -3670,7 +3670,7 @@ options_postprocess_mutate(struct options *o, struct
env_set *es)
}
/* check if any option should force disabling DCO */
-#if defined(TARGET_LINUX)
+#if defined(TARGET_LINUX) || defined(TARGET_FREEBSD)
o->tuntap_options.disable_dco = !dco_check_option_conflict(D_DCO, o);
#endif
@@ -5872,7 +5872,7 @@ add_option(struct options *options,
#endif
else if (streq(p[0], "disable-dco"))
{
-#if defined(TARGET_LINUX)
+#if defined(TARGET_LINUX) || defined(TARGET_FREEBSD)
options->tuntap_options.disable_dco = true;
#endif
}
diff --git a/src/openvpn/options.h b/src/openvpn/options.h
index ec3c44b1..212f4b05 100644
--- a/src/openvpn/options.h
+++ b/src/openvpn/options.h
@@ -876,7 +876,7 @@ void options_string_import(struct options *options,
bool key_is_external(const struct options *options);
-#if defined(ENABLE_DCO) && defined(TARGET_LINUX)
+#if defined(ENABLE_DCO) && (defined(TARGET_LINUX) || defined(TARGET_FREEBSD))
/**
* Returns whether the current configuration has dco enabled.
@@ -887,7 +887,7 @@ dco_enabled(const struct options *o)
return !o->tuntap_options.disable_dco;
}
-#else /* if defined(ENABLE_DCO) && defined(TARGET_LINUX) */
+#else /* if defined(ENABLE_DCO) && (defined(TARGET_LINUX) ||
defined(TARGET_FREEBSD))*/
static inline bool
dco_enabled(const struct options *o)
diff --git a/src/openvpn/ovpn_dco_freebsd.h b/src/openvpn/ovpn_dco_freebsd.h
new file mode 100644
index 00000000..abebbb78
--- /dev/null
+++ b/src/openvpn/ovpn_dco_freebsd.h
@@ -0,0 +1,64 @@
+/*-
+ * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
+ *
+ * Copyright (c) 2021 Rubicon Communications, LLC (Netgate)
+ *
+ * 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 PROJECT 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 PROJECT 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 _NET_IF_OVPN_H_
+#define _NET_IF_OVPN_H_
+
+#include <sys/types.h>
+#include <netinet/in.h>
+
+/* Maximum size of an ioctl request. */
+#define OVPN_MAX_REQUEST_SIZE 4096
+
+enum ovpn_notif_type {
+ OVPN_NOTIF_DEL_PEER,
+};
+
+enum ovpn_key_slot {
+ OVPN_KEY_SLOT_PRIMARY = 0,
+ OVPN_KEY_SLOT_SECONDARY = 1
+};
+
+enum ovpn_key_cipher {
+ OVPN_CIPHER_ALG_NONE = 0,
+ OVPN_CIPHER_ALG_AES_GCM = 1,
+ OVPN_CIPHER_ALG_CHACHA20_POLY1305 = 2
+};
+
+#define OVPN_NEW_PEER _IO ('D', 1)
+#define OVPN_DEL_PEER _IO ('D', 2)
+#define OVPN_GET_STATS _IO ('D', 3)
+#define OVPN_NEW_KEY _IO ('D', 4)
+#define OVPN_SWAP_KEYS _IO ('D', 5)
+#define OVPN_DEL_KEY _IO ('D', 6)
+#define OVPN_SET_PEER _IO ('D', 7)
+#define OVPN_START_VPN _IO ('D', 8)
+#define OVPN_SEND_PKT _IO ('D', 9)
+#define OVPN_POLL_PKT _IO ('D', 10)
+#define OVPN_GET_PKT _IO ('D', 11)
+
+#endif
diff --git a/src/openvpn/tun.c b/src/openvpn/tun.c
index 54f7d72c..e84d5a27 100644
--- a/src/openvpn/tun.c
+++ b/src/openvpn/tun.c
@@ -1724,7 +1724,7 @@ tun_name_is_fixed(const char *dev)
return has_digit(dev);
}
-#if defined(TARGET_LINUX)
+#if defined(TARGET_LINUX) || defined(TARGET_FREEBSD)
static bool
tun_dco_enabled(struct tuntap *tt)
{
@@ -1838,9 +1838,9 @@ open_tun_generic(const char *dev, const char *dev_type,
const char *dev_node,
tt->actual_name = string_alloc(dynamic_opened ? dynamic_name : dev,
NULL);
}
}
-#endif /* !_WIN32 && !TARGET_LINUX */
+#endif /* !_WIN32 && !TARGET_LINUX && !TARGET_FREEBSD*/
-#if defined(TARGET_LINUX)
+#if defined(TARGET_LINUX) || defined(TARGET_FREEBSD)
static void
open_tun_dco_generic(const char *dev, const char *dev_type,
struct tuntap *tt, openvpn_net_ctx_t *ctx)
@@ -1913,7 +1913,7 @@ open_tun_dco_generic(const char *dev, const char
*dev_type,
tt->actual_name = string_alloc(dev, NULL);
}
}
-#endif /* TARGET_LINUX */
+#endif /* TARGET_LINUX || TARGET_FREEBSD*/
#if !defined(_WIN32)
static void
@@ -2296,7 +2296,7 @@ close_tun(struct tuntap *tt, openvpn_net_ctx_t *ctx)
net_ctx_reset(ctx);
}
-#ifdef TARGET_LINUX
+#if defined(TARGET_LINUX) || defined(TARGET_FREEBSD)
if (tun_dco_enabled(tt))
{
close_tun_dco(tt, ctx);
@@ -2917,20 +2917,24 @@ void
open_tun(const char *dev, const char *dev_type, const char *dev_node, struct
tuntap *tt,
openvpn_net_ctx_t *ctx)
{
- open_tun_generic(dev, dev_type, dev_node, tt);
-
- if (tt->fd >= 0 && tt->type == DEV_TYPE_TUN)
- {
- int i = IFF_POINTOPOINT | IFF_MULTICAST;
+ if (tun_dco_enabled(tt)) {
+ open_tun_dco_generic(dev, dev_type, tt, ctx);
+ } else {
+ open_tun_generic(dev, dev_type, dev_node, tt);
- if (ioctl(tt->fd, TUNSIFMODE, &i) < 0)
+ if (tt->fd >= 0 && tt->type == DEV_TYPE_TUN)
{
- msg(M_WARN | M_ERRNO, "ioctl(TUNSIFMODE)");
- }
- i = 1;
- if (ioctl(tt->fd, TUNSIFHEAD, &i) < 0)
- {
- msg(M_WARN | M_ERRNO, "ioctl(TUNSIFHEAD)");
+ int i = IFF_POINTOPOINT | IFF_MULTICAST;
+
+ if (ioctl(tt->fd, TUNSIFMODE, &i) < 0)
+ {
+ msg(M_WARN | M_ERRNO, "ioctl(TUNSIFMODE)");
+ }
+ i = 1;
+ if (ioctl(tt->fd, TUNSIFHEAD, &i) < 0)
+ {
+ msg(M_WARN | M_ERRNO, "ioctl(TUNSIFHEAD)");
+ }
}
}
}
diff --git a/src/openvpn/tun.h b/src/openvpn/tun.h
index 8ec8f51f..ea4946e9 100644
--- a/src/openvpn/tun.h
+++ b/src/openvpn/tun.h
@@ -142,6 +142,12 @@ struct tuntap_options {
bool disable_dco;
};
+#elif defined(TARGET_FREEBSD)
+
+struct tuntap_options {
+ bool disable_dco;
+};
+
#else /* if defined(_WIN32) || defined(TARGET_ANDROID) */
struct tuntap_options {
--
2.37.1
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