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-rw-r--r--src/charon/network/socket.c755
1 files changed, 755 insertions, 0 deletions
diff --git a/src/charon/network/socket.c b/src/charon/network/socket.c
new file mode 100644
index 000000000..00ba22d5a
--- /dev/null
+++ b/src/charon/network/socket.c
@@ -0,0 +1,755 @@
+/**
+ * @file socket.c
+ *
+ * @brief Implementation of socket_t.
+ *
+ */
+
+/*
+ * Copyright (C) 2006 Tobias Brunner, Daniel Roethlisberger
+ * Copyright (C) 2005-2006 Martin Willi
+ * 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.
+ */
+
+#include <pthread.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/ip6.h>
+#include <netinet/udp.h>
+#include <linux/ipsec.h>
+#include <linux/filter.h>
+#include <net/if.h>
+
+#include "socket.h"
+
+#include <daemon.h>
+
+/* 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/in.h */
+#ifndef IP_IPSEC_POLICY
+#define IP_IPSEC_POLICY 16
+#endif /*IP_IPSEC_POLICY*/
+
+/* 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*/
+
+/* missing on uclibc */
+#ifndef IPV6_IPSEC_POLICY
+#define IPV6_IPSEC_POLICY 34
+#endif /*IPV6_IPSEC_POLICY*/
+
+typedef struct private_socket_t private_socket_t;
+
+/**
+ * Private data of an socket_t object
+ */
+struct private_socket_t{
+ /**
+ * public functions
+ */
+ 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;
+};
+
+/**
+ * implementation of socket_t.receive
+ */
+static status_t receiver(private_socket_t *this, packet_t **packet)
+{
+ char buffer[MAX_PACKET];
+ chunk_t data;
+ packet_t *pkt;
+ struct udphdr *udp;
+ host_t *source = NULL, *dest = NULL;
+ int bytes_read = 0;
+ int data_offset, 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");
+
+ pthread_setcancelstate(PTHREAD_CANCEL_ENABLE, &oldstate);
+ if (select(max(this->recv4, this->recv6) + 1, &rfds, NULL, NULL, NULL) <= 0)
+ {
+ pthread_setcancelstate(oldstate, NULL);
+ return FAILED;
+ }
+ pthread_setcancelstate(oldstate, NULL);
+
+ 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, MAX_PACKET, 0);
+ if (bytes_read < 0)
+ {
+ DBG1(DBG_NET, "error reading from IPv4 socket: %m");
+ 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) == this->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 = sizeof(buffer);
+ 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: %m");
+ 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;
+ }
+ 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);
+ }
+ }
+ /* 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) == this->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;
+}
+
+/**
+ * implementation of socket_t.send
+ */
+status_t sender(private_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 == this->port)
+ {
+ if (family == AF_INET)
+ {
+ skt = this->send4;
+ }
+ else
+ {
+ skt = this->send6;
+ }
+ }
+ else if (sport == this->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 */
+ if (data.len > MAX_PACKET - MARKER_LEN)
+ {
+ DBG1(DBG_NET, "unable to send packet: it's too big (%d bytes)",
+ data.len);
+ return FAILED;
+ }
+ 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 (!dst->is_anyaddr(dst))
+ {
+ 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));
+ }
+ 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));
+ }
+ }
+
+ bytes_sent = sendmsg(skt, &msg, 0);
+
+ if (bytes_sent != data.len)
+ {
+ DBG1(DBG_NET, "error writing to socket: %m");
+ return FAILED;
+ }
+ return SUCCESS;
+}
+
+/**
+ * open a socket to send packets
+ */
+static int open_send_socket(private_socket_t *this, int family, u_int16_t port)
+{
+ int on = TRUE;
+ int type = UDP_ENCAP_ESPINUDP;
+ struct sockaddr_storage addr;
+ u_int sol, ipsec_policy;
+ struct sadb_x_policy policy;
+ int skt;
+
+ memset(&addr, 0, sizeof(addr));
+ /* precalculate constants depending on address family */
+ switch (family)
+ {
+ case AF_INET:
+ {
+ struct sockaddr_in *sin = (struct sockaddr_in *)&addr;
+ sin->sin_family = AF_INET;
+ sin->sin_addr.s_addr = INADDR_ANY;
+ sin->sin_port = htons(port);
+ sol = SOL_IP;
+ ipsec_policy = IP_IPSEC_POLICY;
+ break;
+ }
+ case AF_INET6:
+ {
+ struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)&addr;
+ sin6->sin6_family = AF_INET6;
+ memcpy(&sin6->sin6_addr, &in6addr_any, sizeof(in6addr_any));
+ sin6->sin6_port = htons(port);
+ sol = SOL_IPV6;
+ ipsec_policy = IPV6_IPSEC_POLICY;
+ break;
+ }
+ default:
+ return 0;
+ }
+
+ skt = socket(family, SOCK_DGRAM, IPPROTO_UDP);
+ if (skt < 0)
+ {
+ DBG1(DBG_NET, "could not open send socket: %m");
+ 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: %m");
+ close(skt);
+ return 0;
+ }
+
+ /* bypass outgoung IKE traffic on send socket */
+ memset(&policy, 0, sizeof(policy));
+ policy.sadb_x_policy_len = sizeof(policy) / sizeof(u_int64_t);
+ policy.sadb_x_policy_exttype = SADB_X_EXT_POLICY;
+ policy.sadb_x_policy_type = IPSEC_POLICY_BYPASS;
+ policy.sadb_x_policy_dir = IPSEC_DIR_OUTBOUND;
+
+ if (setsockopt(skt, sol, ipsec_policy, &policy, sizeof(policy)) < 0)
+ {
+ DBG1(DBG_NET, "unable to set IPSEC_POLICY on send socket: %m");
+ close(skt);
+ return 0;
+ }
+
+ /* We don't receive packets on the send socket, but we need a INBOUND policy.
+ * Otherwise, UDP decapsulation does not work!!! */
+ policy.sadb_x_policy_dir = IPSEC_DIR_INBOUND;
+ if (setsockopt(skt, sol, ipsec_policy, &policy, sizeof(policy)) < 0)
+ {
+ DBG1(DBG_NET, "unable to set IPSEC_POLICY on send socket: %m");
+ 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: %m");
+ 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: %m; NAT-T may fail");
+ }
+ }
+
+ return skt;
+}
+
+/**
+ * open a socket to receive packets
+ */
+static int open_recv_socket(private_socket_t *this, int family)
+{
+ int skt;
+ int on = TRUE;
+ u_int proto_offset, ip_len, sol, ipsec_policy, udp_header, ike_header;
+ struct sadb_x_policy policy;
+
+ /* precalculate constants depending on address family */
+ switch (family)
+ {
+ case AF_INET:
+ proto_offset = IP_PROTO_OFFSET;
+ ip_len = IP_LEN;
+ sol = SOL_IP;
+ ipsec_policy = IP_IPSEC_POLICY;
+ break;
+ case AF_INET6:
+ proto_offset = IP6_PROTO_OFFSET;
+ ip_len = 0; /* IPv6 raw sockets contain no IP header */
+ sol = SOL_IPV6;
+ ipsec_policy = IPV6_IPSEC_POLICY;
+ 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, this->port, 1, 0),
+ BPF_JUMP(BPF_JMP+BPF_JEQ+BPF_K, this->natt_port, 5, 12),
+ /* port */
+ /* IKE version must be 2.0 */
+ BPF_STMT(BPF_LD+BPF_B+BPF_ABS, ike_header + IKE_VERSION_OFFSET),
+ BPF_JUMP(BPF_JMP+BPF_JEQ+BPF_K, 0x20, 0, 10),
+ /* 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, 5),
+ /* nat-t: IKE version must be 2.0 */
+ BPF_STMT(BPF_LD+BPF_B+BPF_ABS, ike_header + MARKER_LEN + IKE_VERSION_OFFSET),
+ BPF_JUMP(BPF_JMP+BPF_JEQ+BPF_K, 0x20, 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: %m");
+ 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: %m");
+ 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: %m");
+ close(skt);
+ return 0;
+ }
+
+ /* bypass incomining IKE traffic on this socket */
+ memset(&policy, 0, sizeof(policy));
+ policy.sadb_x_policy_len = sizeof(policy) / sizeof(u_int64_t);
+ policy.sadb_x_policy_exttype = SADB_X_EXT_POLICY;
+ policy.sadb_x_policy_type = IPSEC_POLICY_BYPASS;
+ policy.sadb_x_policy_dir = IPSEC_DIR_INBOUND;
+
+ if (setsockopt(skt, sol, ipsec_policy, &policy, sizeof(policy)) < 0)
+ {
+ DBG1(DBG_NET, "unable to set IPSEC_POLICY on raw socket: %m");
+ close(skt);
+ return 0;
+ }
+
+ return skt;
+}
+
+/**
+ * implementation of socket_t.destroy
+ */
+static void destroy(private_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_t *socket_create(u_int16_t port, u_int16_t natt_port)
+{
+ private_socket_t *this = malloc_thing(private_socket_t);
+
+ /* public functions */
+ this->public.send = (status_t(*)(socket_t*, packet_t*))sender;
+ this->public.receive = (status_t(*)(socket_t*, packet_t**))receiver;
+ this->public.destroy = (void(*)(socket_t*)) destroy;
+
+ this->port = port;
+ this->natt_port = natt_port;
+ this->recv4 = 0;
+ this->recv6 = 0;
+ this->send4 = 0;
+ this->send6 = 0;
+ this->send4_natt = 0;
+ this->send6_natt = 0;
+
+ 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, this->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, this->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, this->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, this->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);
+ charon->kill(charon, "socket initialization failed");
+ }
+
+ return (socket_t*)this;
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-09-21 00:13:01 +0000