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author | Yves-Alexis Perez <corsac@debian.org> | 2013-01-02 14:18:20 +0100 |
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committer | Yves-Alexis Perez <corsac@debian.org> | 2013-01-02 14:18:20 +0100 |
commit | c1343b3278cdf99533b7902744d15969f9d6fdc1 (patch) | |
tree | d5ed3dc5677a59260ec41cd39bb284d3e94c91b3 /src/libcharon/plugins/socket_raw | |
parent | b34738ed08c2227300d554b139e2495ca5da97d6 (diff) | |
download | vyos-strongswan-c1343b3278cdf99533b7902744d15969f9d6fdc1.tar.gz vyos-strongswan-c1343b3278cdf99533b7902744d15969f9d6fdc1.zip |
Imported Upstream version 5.0.1
Diffstat (limited to 'src/libcharon/plugins/socket_raw')
-rw-r--r-- | src/libcharon/plugins/socket_raw/Makefile.am | 17 | ||||
-rw-r--r-- | src/libcharon/plugins/socket_raw/Makefile.in | 616 | ||||
-rw-r--r-- | src/libcharon/plugins/socket_raw/socket_raw_plugin.c | 79 | ||||
-rw-r--r-- | src/libcharon/plugins/socket_raw/socket_raw_plugin.h | 42 | ||||
-rw-r--r-- | src/libcharon/plugins/socket_raw/socket_raw_socket.c | 717 | ||||
-rw-r--r-- | src/libcharon/plugins/socket_raw/socket_raw_socket.h | 51 |
6 files changed, 0 insertions, 1522 deletions
diff --git a/src/libcharon/plugins/socket_raw/Makefile.am b/src/libcharon/plugins/socket_raw/Makefile.am deleted file mode 100644 index 2109ae5f3..000000000 --- a/src/libcharon/plugins/socket_raw/Makefile.am +++ /dev/null @@ -1,17 +0,0 @@ - -INCLUDES = -I${linux_headers} -I$(top_srcdir)/src/libstrongswan \ - -I$(top_srcdir)/src/libhydra -I$(top_srcdir)/src/libcharon - -AM_CFLAGS = -rdynamic - -if MONOLITHIC -noinst_LTLIBRARIES = libstrongswan-socket-raw.la -else -plugin_LTLIBRARIES = libstrongswan-socket-raw.la -endif - -libstrongswan_socket_raw_la_SOURCES = \ - socket_raw_plugin.h socket_raw_plugin.c \ - socket_raw_socket.h socket_raw_socket.c - -libstrongswan_socket_raw_la_LDFLAGS = -module -avoid-version diff --git a/src/libcharon/plugins/socket_raw/Makefile.in b/src/libcharon/plugins/socket_raw/Makefile.in deleted file mode 100644 index 5abceb6c3..000000000 --- a/src/libcharon/plugins/socket_raw/Makefile.in +++ /dev/null @@ -1,616 +0,0 @@ -# Makefile.in generated by automake 1.11.1 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pdf pdf-am ps ps-am tags uninstall uninstall-am \ - uninstall-pluginLTLIBRARIES - - -# Tell versions [3.59,3.63) of GNU make to not export all variables. -# Otherwise a system limit (for SysV at least) may be exceeded. -.NOEXPORT: diff --git a/src/libcharon/plugins/socket_raw/socket_raw_plugin.c b/src/libcharon/plugins/socket_raw/socket_raw_plugin.c deleted file mode 100644 index 1299c30ca..000000000 --- a/src/libcharon/plugins/socket_raw/socket_raw_plugin.c +++ /dev/null @@ -1,79 +0,0 @@ -/* - * Copyright (C) 2010 Tobias Brunner - * Hochschule fuer Technik Rapperswil - * Copyright (C) 2010 Martin Willi - * Copyright (C) 2010 revosec AG - * - * This program is free software; you can redistribute it and/or modify it - * under the terms of the GNU General Public License as published by the - * Free Software Foundation; either version 2 of the License, or (at your - * option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>. - * - * 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. - */ - -#include "socket_raw_plugin.h" - -#include "socket_raw_socket.h" - -#include <daemon.h> - -typedef struct private_socket_raw_plugin_t private_socket_raw_plugin_t; - -/** - * Private data of socket plugin - */ -struct private_socket_raw_plugin_t { - - /** - * Implements plugin interface - */ - socket_raw_plugin_t public; -}; - -METHOD(plugin_t, get_name, char*, - private_socket_raw_plugin_t *this) -{ - return "socket-raw"; -} - -METHOD(plugin_t, get_features, int, - private_socket_raw_plugin_t *this, plugin_feature_t *features[]) -{ - static plugin_feature_t f[] = { - PLUGIN_CALLBACK(socket_register, socket_raw_socket_create), - PLUGIN_PROVIDE(CUSTOM, "socket"), - }; - *features = f; - return countof(f); -} - -METHOD(plugin_t, destroy, void, - private_socket_raw_plugin_t *this) -{ - free(this); -} - -/* - * see header file - */ -plugin_t *socket_raw_plugin_create() -{ - private_socket_raw_plugin_t *this; - - INIT(this, - .public = { - .plugin = { - .get_name = _get_name, - .get_features = _get_features, - .destroy = _destroy, - }, - }, - ); - - return &this->public.plugin; -} - diff --git a/src/libcharon/plugins/socket_raw/socket_raw_plugin.h b/src/libcharon/plugins/socket_raw/socket_raw_plugin.h deleted file mode 100644 index a692b7594..000000000 --- a/src/libcharon/plugins/socket_raw/socket_raw_plugin.h +++ /dev/null @@ -1,42 +0,0 @@ -/* - * Copyright (C) 2010 Martin Willi - * Copyright (C) 2010 revosec AG - * - * This program is free software; you can redistribute it and/or modify it - * under the terms of the GNU General Public License as published by the - * Free Software Foundation; either version 2 of the License, or (at your - * option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>. - * - * 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. - */ - -/** - * @defgroup socket_raw socket_raw - * @ingroup cplugins - * - * @defgroup socket_raw_plugin socket_raw_plugin - * @{ @ingroup socket_raw - */ - -#ifndef SOCKET_RAW_PLUGIN_H_ -#define SOCKET_RAW_PLUGIN_H_ - -#include <plugins/plugin.h> - -typedef struct socket_raw_plugin_t socket_raw_plugin_t; - -/** - * RAW socket implementation plugin. - */ -struct socket_raw_plugin_t { - - /** - * implements plugin interface - */ - plugin_t plugin; -}; - -#endif /** SOCKET_RAW_PLUGIN_H_ @}*/ diff --git a/src/libcharon/plugins/socket_raw/socket_raw_socket.c b/src/libcharon/plugins/socket_raw/socket_raw_socket.c deleted file mode 100644 index ae37d8f2b..000000000 --- a/src/libcharon/plugins/socket_raw/socket_raw_socket.c +++ /dev/null @@ -1,717 +0,0 @@ -/* - * Copyright (C) 2006-2010 Tobias Brunner - * Copyright (C) 2005-2010 Martin Willi - * Copyright (C) 2006 Daniel Roethlisberger - * Copyright (C) 2005 Jan Hutter - * Hochschule fuer Technik Rapperswil - * - * This program is free software; you can redistribute it and/or modify it - * under the terms of the GNU General Public License as published by the - * Free Software Foundation; either version 2 of the License, or (at your - * option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>. - * - * 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. - */ - -/* for struct in6_pktinfo */ -#define _GNU_SOURCE - -#include "socket_raw_socket.h" - -#include <sys/types.h> -#include <sys/socket.h> -#include <string.h> -#include <errno.h> -#include <unistd.h> -#include <stdlib.h> -#include <fcntl.h> -#include <sys/ioctl.h> -#include <netinet/in.h> -#include <netinet/ip.h> -#include <netinet/udp.h> -#include <linux/types.h> -#include <linux/filter.h> -#include <net/if.h> - -#include <hydra.h> -#include <daemon.h> -#include <threading/thread.h> - -/* Maximum size of a packet */ -#define MAX_PACKET 10000 - -/* constants for packet handling */ -#define IP_LEN sizeof(struct iphdr) -#define IP6_LEN sizeof(struct ip6_hdr) -#define UDP_LEN sizeof(struct udphdr) -#define MARKER_LEN sizeof(u_int32_t) - -/* offsets for packet handling */ -#define IP_PROTO_OFFSET 9 -#define IP6_PROTO_OFFSET 6 -#define IKE_VERSION_OFFSET 17 -#define IKE_LENGTH_OFFSET 24 - -/* from linux/udp.h */ -#ifndef UDP_ENCAP -#define UDP_ENCAP 100 -#endif /*UDP_ENCAP*/ - -#ifndef UDP_ENCAP_ESPINUDP -#define UDP_ENCAP_ESPINUDP 2 -#endif /*UDP_ENCAP_ESPINUDP*/ - -/* needed for older kernel headers */ -#ifndef IPV6_2292PKTINFO -#define IPV6_2292PKTINFO 2 -#endif /*IPV6_2292PKTINFO*/ - -typedef struct private_socket_raw_socket_t private_socket_raw_socket_t; - -/** - * Private data of an socket_t object - */ -struct private_socket_raw_socket_t { - - /** - * public functions - */ - socket_raw_socket_t public; - - /** - * regular port - */ - int port; - - /** - * port used for nat-t - */ - int natt_port; - - /** - * raw receiver socket for IPv4 - */ - int recv4; - - /** - * raw receiver socket for IPv6 - */ - int recv6; - - /** - * send socket on regular port for IPv4 - */ - int send4; - - /** - * send socket on regular port for IPv6 - */ - int send6; - - /** - * send socket on nat-t port for IPv4 - */ - int send4_natt; - - /** - * send socket on nat-t port for IPv6 - */ - int send6_natt; - - /** - * Maximum packet size to receive - */ - int max_packet; -}; - -METHOD(socket_t, receiver, status_t, - private_socket_raw_socket_t *this, packet_t **packet) -{ - char buffer[this->max_packet]; - chunk_t data; - packet_t *pkt; - struct udphdr *udp; - host_t *source = NULL, *dest = NULL; - int bytes_read = 0, data_offset; - bool oldstate; - fd_set rfds; - - FD_ZERO(&rfds); - - if (this->recv4) - { - FD_SET(this->recv4, &rfds); - } - if (this->recv6) - { - FD_SET(this->recv6, &rfds); - } - - DBG2(DBG_NET, "waiting for data on raw sockets"); - - oldstate = thread_cancelability(TRUE); - if (select(max(this->recv4, this->recv6) + 1, &rfds, NULL, NULL, NULL) <= 0) - { - thread_cancelability(oldstate); - return FAILED; - } - thread_cancelability(oldstate); - - if (this->recv4 && FD_ISSET(this->recv4, &rfds)) - { - /* IPv4 raw sockets return the IP header. We read src/dest - * information directly from the raw header */ - struct iphdr *ip; - struct sockaddr_in src, dst; - - bytes_read = recv(this->recv4, buffer, this->max_packet, 0); - if (bytes_read < 0) - { - DBG1(DBG_NET, "error reading from IPv4 socket: %s", strerror(errno)); - return FAILED; - } - if (bytes_read == this->max_packet) - { - DBG1(DBG_NET, "receive buffer too small, packet discarded"); - return FAILED; - } - DBG3(DBG_NET, "received IPv4 packet %b", buffer, bytes_read); - - /* read source/dest from raw IP/UDP header */ - if (bytes_read < IP_LEN + UDP_LEN + MARKER_LEN) - { - DBG1(DBG_NET, "received IPv4 packet too short (%d bytes)", - bytes_read); - return FAILED; - } - ip = (struct iphdr*) buffer; - udp = (struct udphdr*) (buffer + IP_LEN); - src.sin_family = AF_INET; - src.sin_addr.s_addr = ip->saddr; - src.sin_port = udp->source; - dst.sin_family = AF_INET; - dst.sin_addr.s_addr = ip->daddr; - dst.sin_port = udp->dest; - source = host_create_from_sockaddr((sockaddr_t*)&src); - dest = host_create_from_sockaddr((sockaddr_t*)&dst); - - pkt = packet_create(); - pkt->set_source(pkt, source); - pkt->set_destination(pkt, dest); - DBG2(DBG_NET, "received packet: from %#H to %#H", source, dest); - data_offset = IP_LEN + UDP_LEN; - /* remove non esp marker */ - if (dest->get_port(dest) == IKEV2_NATT_PORT) - { - data_offset += MARKER_LEN; - } - /* fill in packet */ - data.len = bytes_read - data_offset; - data.ptr = malloc(data.len); - memcpy(data.ptr, buffer + data_offset, data.len); - pkt->set_data(pkt, data); - } - else if (this->recv6 && FD_ISSET(this->recv6, &rfds)) - { - /* IPv6 raw sockets return no IP header. We must query - * src/dest via socket options/ancillary data */ - struct msghdr msg; - struct cmsghdr *cmsgptr; - struct sockaddr_in6 src, dst; - struct iovec iov; - char ancillary[64]; - - msg.msg_name = &src; - msg.msg_namelen = sizeof(src); - iov.iov_base = buffer; - iov.iov_len = this->max_packet; - msg.msg_iov = &iov; - msg.msg_iovlen = 1; - msg.msg_control = ancillary; - msg.msg_controllen = sizeof(ancillary); - msg.msg_flags = 0; - - bytes_read = recvmsg(this->recv6, &msg, 0); - if (bytes_read < 0) - { - DBG1(DBG_NET, "error reading from IPv6 socket: %s", strerror(errno)); - return FAILED; - } - DBG3(DBG_NET, "received IPv6 packet %b", buffer, bytes_read); - - if (bytes_read < IP_LEN + UDP_LEN + MARKER_LEN) - { - DBG3(DBG_NET, "received IPv6 packet too short (%d bytes)", - bytes_read); - return FAILED; - } - - /* read ancillary data to get destination address */ - for (cmsgptr = CMSG_FIRSTHDR(&msg); cmsgptr != NULL; - cmsgptr = CMSG_NXTHDR(&msg, cmsgptr)) - { - if (cmsgptr->cmsg_len == 0) - { - DBG1(DBG_NET, "error reading IPv6 ancillary data"); - return FAILED; - } - -#ifdef HAVE_IN6_PKTINFO - if (cmsgptr->cmsg_level == SOL_IPV6 && - cmsgptr->cmsg_type == IPV6_2292PKTINFO) - { - struct in6_pktinfo *pktinfo; - pktinfo = (struct in6_pktinfo*)CMSG_DATA(cmsgptr); - - memset(&dst, 0, sizeof(dst)); - memcpy(&dst.sin6_addr, &pktinfo->ipi6_addr, sizeof(dst.sin6_addr)); - dst.sin6_family = AF_INET6; - udp = (struct udphdr*) (buffer); - dst.sin6_port = udp->dest; - src.sin6_port = udp->source; - dest = host_create_from_sockaddr((sockaddr_t*)&dst); - } -#endif /* HAVE_IN6_PKTINFO */ - } - /* ancillary data missing? */ - if (dest == NULL) - { - DBG1(DBG_NET, "error reading IPv6 packet header"); - return FAILED; - } - - source = host_create_from_sockaddr((sockaddr_t*)&src); - - pkt = packet_create(); - pkt->set_source(pkt, source); - pkt->set_destination(pkt, dest); - DBG2(DBG_NET, "received packet: from %#H to %#H", source, dest); - data_offset = UDP_LEN; - /* remove non esp marker */ - if (dest->get_port(dest) == IKEV2_NATT_PORT) - { - data_offset += MARKER_LEN; - } - /* fill in packet */ - data.len = bytes_read - data_offset; - data.ptr = malloc(data.len); - memcpy(data.ptr, buffer + data_offset, data.len); - pkt->set_data(pkt, data); - } - else - { - /* oops, shouldn't happen */ - return FAILED; - } - - /* return packet */ - *packet = pkt; - return SUCCESS; -} - -METHOD(socket_t, sender, status_t, - private_socket_raw_socket_t *this, packet_t *packet) -{ - int sport, skt, family; - ssize_t bytes_sent; - chunk_t data, marked; - host_t *src, *dst; - struct msghdr msg; - struct cmsghdr *cmsg; - struct iovec iov; - - src = packet->get_source(packet); - dst = packet->get_destination(packet); - data = packet->get_data(packet); - - DBG2(DBG_NET, "sending packet: from %#H to %#H", src, dst); - - /* send data */ - sport = src->get_port(src); - family = dst->get_family(dst); - if (sport == IKEV2_UDP_PORT) - { - if (family == AF_INET) - { - skt = this->send4; - } - else - { - skt = this->send6; - } - } - else if (sport == IKEV2_NATT_PORT) - { - if (family == AF_INET) - { - skt = this->send4_natt; - } - else - { - skt = this->send6_natt; - } - /* NAT keepalives without marker */ - if (data.len != 1 || data.ptr[0] != 0xFF) - { - /* add non esp marker to packet */ - marked = chunk_alloc(data.len + MARKER_LEN); - memset(marked.ptr, 0, MARKER_LEN); - memcpy(marked.ptr + MARKER_LEN, data.ptr, data.len); - /* let the packet do the clean up for us */ - packet->set_data(packet, marked); - data = marked; - } - } - else - { - DBG1(DBG_NET, "unable to locate a send socket for port %d", sport); - return FAILED; - } - - memset(&msg, 0, sizeof(struct msghdr)); - msg.msg_name = dst->get_sockaddr(dst);; - msg.msg_namelen = *dst->get_sockaddr_len(dst); - iov.iov_base = data.ptr; - iov.iov_len = data.len; - msg.msg_iov = &iov; - msg.msg_iovlen = 1; - msg.msg_flags = 0; - - if (!src->is_anyaddr(src)) - { - if (family == AF_INET) - { - char buf[CMSG_SPACE(sizeof(struct in_pktinfo))]; - struct in_pktinfo *pktinfo; - struct sockaddr_in *sin; - - msg.msg_control = buf; - msg.msg_controllen = sizeof(buf); - cmsg = CMSG_FIRSTHDR(&msg); - cmsg->cmsg_level = SOL_IP; - cmsg->cmsg_type = IP_PKTINFO; - cmsg->cmsg_len = CMSG_LEN(sizeof(struct in_pktinfo)); - pktinfo = (struct in_pktinfo*)CMSG_DATA(cmsg); - memset(pktinfo, 0, sizeof(struct in_pktinfo)); - sin = (struct sockaddr_in*)src->get_sockaddr(src); - memcpy(&pktinfo->ipi_spec_dst, &sin->sin_addr, sizeof(struct in_addr)); - } -#ifdef HAVE_IN6_PKTINFO - else - { - char buf[CMSG_SPACE(sizeof(struct in6_pktinfo))]; - struct in6_pktinfo *pktinfo; - struct sockaddr_in6 *sin; - - msg.msg_control = buf; - msg.msg_controllen = sizeof(buf); - cmsg = CMSG_FIRSTHDR(&msg); - cmsg->cmsg_level = SOL_IPV6; - cmsg->cmsg_type = IPV6_2292PKTINFO; - cmsg->cmsg_len = CMSG_LEN(sizeof(struct in6_pktinfo)); - pktinfo = (struct in6_pktinfo*)CMSG_DATA(cmsg); - memset(pktinfo, 0, sizeof(struct in6_pktinfo)); - sin = (struct sockaddr_in6*)src->get_sockaddr(src); - memcpy(&pktinfo->ipi6_addr, &sin->sin6_addr, sizeof(struct in6_addr)); - } -#endif /* HAVE_IN6_PKTINFO */ - } - - bytes_sent = sendmsg(skt, &msg, 0); - - if (bytes_sent != data.len) - { - DBG1(DBG_NET, "error writing to socket: %s", strerror(errno)); - return FAILED; - } - return SUCCESS; -} - -/** - * open a socket to send packets - */ -static int open_send_socket(private_socket_raw_socket_t *this, - int family, u_int16_t port) -{ - int on = TRUE; - int type = UDP_ENCAP_ESPINUDP; - struct sockaddr_storage addr; - int skt; - - memset(&addr, 0, sizeof(addr)); - addr.ss_family = family; - /* precalculate constants depending on address family */ - switch (family) - { - case AF_INET: - { - struct sockaddr_in *sin = (struct sockaddr_in *)&addr; - htoun32(&sin->sin_addr.s_addr, INADDR_ANY); - htoun16(&sin->sin_port, port); - break; - } - case AF_INET6: - { - struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)&addr; - memcpy(&sin6->sin6_addr, &in6addr_any, sizeof(in6addr_any)); - htoun16(&sin6->sin6_port, port); - break; - } - default: - return 0; - } - - skt = socket(family, SOCK_DGRAM, IPPROTO_UDP); - if (skt < 0) - { - DBG1(DBG_NET, "could not open send socket: %s", strerror(errno)); - return 0; - } - - if (setsockopt(skt, SOL_SOCKET, SO_REUSEADDR, (void*)&on, sizeof(on)) < 0) - { - DBG1(DBG_NET, "unable to set SO_REUSEADDR on send socket: %s", - strerror(errno)); - close(skt); - return 0; - } - - /* bind the send socket */ - if (bind(skt, (struct sockaddr *)&addr, sizeof(addr)) < 0) - { - DBG1(DBG_NET, "unable to bind send socket: %s", - strerror(errno)); - close(skt); - return 0; - } - - if (family == AF_INET) - { - /* enable UDP decapsulation globally, only for one socket needed */ - if (setsockopt(skt, SOL_UDP, UDP_ENCAP, &type, sizeof(type)) < 0) - { - DBG1(DBG_NET, "unable to set UDP_ENCAP: %s; NAT-T may fail", - strerror(errno)); - } - } - - if (!hydra->kernel_interface->bypass_socket(hydra->kernel_interface, - skt, family)) - { - DBG1(DBG_NET, "installing bypass policy on send socket failed"); - } - - return skt; -} - -/** - * open a socket to receive packets - */ -static int open_recv_socket(private_socket_raw_socket_t *this, int family) -{ - int skt; - int on = TRUE; - u_int ip_len, sol, udp_header, ike_header; - - /* precalculate constants depending on address family */ - switch (family) - { - case AF_INET: - ip_len = IP_LEN; - sol = SOL_IP; - break; - case AF_INET6: - ip_len = 0; /* IPv6 raw sockets contain no IP header */ - sol = SOL_IPV6; - break; - default: - return 0; - } - udp_header = ip_len; - ike_header = ip_len + UDP_LEN; - - /* This filter code filters out all non-IKEv2 traffic on - * a SOCK_RAW IP_PROTP_UDP socket. Handling of other - * IKE versions is done in pluto. - */ - struct sock_filter ikev2_filter_code[] = - { - /* Destination Port must be either port or natt_port */ - BPF_STMT(BPF_LD+BPF_H+BPF_ABS, udp_header + 2), - BPF_JUMP(BPF_JMP+BPF_JEQ+BPF_K, IKEV2_UDP_PORT, 1, 0), - BPF_JUMP(BPF_JMP+BPF_JEQ+BPF_K, IKEV2_NATT_PORT, 6, 14), - /* port */ - /* IKE version must be 2.x */ - BPF_STMT(BPF_LD+BPF_B+BPF_ABS, ike_header + IKE_VERSION_OFFSET), - BPF_STMT(BPF_ALU+BPF_RSH+BPF_K, 4), - BPF_JUMP(BPF_JMP+BPF_JEQ+BPF_K, 2, 0, 11), - /* packet length is length in IKEv2 header + ip header + udp header */ - BPF_STMT(BPF_LD+BPF_W+BPF_ABS, ike_header + IKE_LENGTH_OFFSET), - BPF_STMT(BPF_ALU+BPF_ADD+BPF_K, ip_len + UDP_LEN), - BPF_STMT(BPF_RET+BPF_A, 0), - /* natt_port */ - /* nat-t: check for marker */ - BPF_STMT(BPF_LD+BPF_W+BPF_ABS, ike_header), - BPF_JUMP(BPF_JMP+BPF_JEQ+BPF_K, 0, 0, 6), - /* nat-t: IKE version must be 2.x */ - BPF_STMT(BPF_LD+BPF_B+BPF_ABS, ike_header + MARKER_LEN + IKE_VERSION_OFFSET), - BPF_STMT(BPF_ALU+BPF_RSH+BPF_K, 4), - BPF_JUMP(BPF_JMP+BPF_JEQ+BPF_K, 2, 0, 3), - /* nat-t: packet length is length in IKEv2 header + ip header + udp header + non esp marker */ - BPF_STMT(BPF_LD+BPF_W+BPF_ABS, ike_header + MARKER_LEN + IKE_LENGTH_OFFSET), - BPF_STMT(BPF_ALU+BPF_ADD+BPF_K, ip_len + UDP_LEN + MARKER_LEN), - BPF_STMT(BPF_RET+BPF_A, 0), - /* packet doesn't match, ignore */ - BPF_STMT(BPF_RET+BPF_K, 0), - }; - - /* Filter struct to use with setsockopt */ - struct sock_fprog ikev2_filter = { - sizeof(ikev2_filter_code) / sizeof(struct sock_filter), - ikev2_filter_code - }; - - /* set up a raw socket */ - skt = socket(family, SOCK_RAW, IPPROTO_UDP); - if (skt < 0) - { - DBG1(DBG_NET, "unable to create raw socket: %s", strerror(errno)); - return 0; - } - - if (setsockopt(skt, SOL_SOCKET, SO_ATTACH_FILTER, - &ikev2_filter, sizeof(ikev2_filter)) < 0) - { - DBG1(DBG_NET, "unable to attach IKEv2 filter to raw socket: %s", - strerror(errno)); - close(skt); - return 0; - } - - if (family == AF_INET6 && - /* we use IPV6_2292PKTINFO, as IPV6_PKTINFO is defined as - * 2 or 50 depending on kernel header version */ - setsockopt(skt, sol, IPV6_2292PKTINFO, &on, sizeof(on)) < 0) - { - DBG1(DBG_NET, "unable to set IPV6_PKTINFO on raw socket: %s", - strerror(errno)); - close(skt); - return 0; - } - - if (!hydra->kernel_interface->bypass_socket(hydra->kernel_interface, - skt, family)) - { - DBG1(DBG_NET, "installing bypass policy on receive socket failed"); - } - - return skt; -} - -METHOD(socket_t, destroy, void, - private_socket_raw_socket_t *this) -{ - if (this->recv4) - { - close(this->recv4); - } - if (this->recv6) - { - close(this->recv6); - } - if (this->send4) - { - close(this->send4); - } - if (this->send6) - { - close(this->send6); - } - if (this->send4_natt) - { - close(this->send4_natt); - } - if (this->send6_natt) - { - close(this->send6_natt); - } - free(this); -} - -/* - * See header for description - */ -socket_raw_socket_t *socket_raw_socket_create() -{ - private_socket_raw_socket_t *this; - - INIT(this, - .public = { - .socket = { - .send = _sender, - .receive = _receiver, - .destroy = _destroy, - }, - }, - .max_packet = lib->settings->get_int(lib->settings, - "charon.max_packet", MAX_PACKET), - ); - - this->recv4 = open_recv_socket(this, AF_INET); - if (this->recv4 == 0) - { - DBG1(DBG_NET, "could not open IPv4 receive socket, IPv4 disabled"); - } - else - { - this->send4 = open_send_socket(this, AF_INET, IKEV2_UDP_PORT); - if (this->send4 == 0) - { - DBG1(DBG_NET, "could not open IPv4 send socket, IPv4 disabled"); - close(this->recv4); - } - else - { - this->send4_natt = open_send_socket(this, AF_INET, IKEV2_NATT_PORT); - if (this->send4_natt == 0) - { - DBG1(DBG_NET, "could not open IPv4 NAT-T send socket"); - } - } - } - - this->recv6 = open_recv_socket(this, AF_INET6); - if (this->recv6 == 0) - { - DBG1(DBG_NET, "could not open IPv6 receive socket, IPv6 disabled"); - } - else - { - this->send6 = open_send_socket(this, AF_INET6, IKEV2_UDP_PORT); - if (this->send6 == 0) - { - DBG1(DBG_NET, "could not open IPv6 send socket, IPv6 disabled"); - close(this->recv6); - } - else - { - this->send6_natt = open_send_socket(this, AF_INET6, IKEV2_NATT_PORT); - if (this->send6_natt == 0) - { - DBG1(DBG_NET, "could not open IPv6 NAT-T send socket"); - } - } - } - - if (!(this->send4 || this->send6) || !(this->recv4 || this->recv6)) - { - DBG1(DBG_NET, "could not create any sockets"); - destroy(this); - return NULL; - } - - return &this->public; -} diff --git a/src/libcharon/plugins/socket_raw/socket_raw_socket.h b/src/libcharon/plugins/socket_raw/socket_raw_socket.h deleted file mode 100644 index 23ff304a8..000000000 --- a/src/libcharon/plugins/socket_raw/socket_raw_socket.h +++ /dev/null @@ -1,51 +0,0 @@ -/* - * Copyright (C) 2010 Martin Willi - * Copyright (C) 2010 revosec AG - * - * This program is free software; you can redistribute it and/or modify it - * under the terms of the GNU General Public License as published by the - * Free Software Foundation; either version 2 of the License, or (at your - * option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>. - * - * 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. - */ - -/** - * @defgroup socket_raw_socket socket_raw_socket - * @{ @ingroup socket_raw - */ - -#ifndef SOCKET_RAW_SOCKET_H_ -#define SOCKET_RAW_SOCKET_H_ - -typedef struct socket_raw_socket_t socket_raw_socket_t; - -#include <network/socket.h> - -/** - * Raw socket, binds to port 500/4500 using any IPv4/IPv6 address. - * - * This imeplementation uses raw sockets to allow binding of other daemons - * (pluto) to UDP/500/4500. An installed "Linux socket filter" filters out - * all non-IKEv2 traffic and handles just IKEv2 messages. An other daemon - * must handle all traffic separately, e.g. ignore IKEv2 traffic, since charon - * handles that. - */ -struct socket_raw_socket_t { - - /** - * Implements the socket_t interface. - */ - socket_t socket; - -}; - -/** - * Create a socket_raw_socket instance. - */ -socket_raw_socket_t *socket_raw_socket_create(); - -#endif /** SOCKET_RAW_SOCKET_H_ @}*/ |