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-rw-r--r--src/charon/threads/kernel_interface.c729
1 files changed, 729 insertions, 0 deletions
diff --git a/src/charon/threads/kernel_interface.c b/src/charon/threads/kernel_interface.c
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--- /dev/null
+++ b/src/charon/threads/kernel_interface.c
@@ -0,0 +1,729 @@
+/**
+ * @file kernel_interface.c
+ *
+ * @brief Implementation of kernel_interface_t.
+ *
+ */
+
+/*
+ * Copyright (C) 2005 Jan Hutter, Martin Willi
+ * Hochschule fuer Technik Rapperswil
+ * Copyright (C) 2003 Herbert Xu.
+ *
+ * Contains modified parts from pluto.
+ *
+ * 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 <sys/types.h>
+#include <sys/socket.h>
+#include <linux/netlink.h>
+#include <pthread.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <errno.h>
+#include <string.h>
+
+#include "kernel_interface.h"
+
+#include <daemon.h>
+#include <utils/linked_list.h>
+
+
+#define KERNEL_ESP 50
+#define KERNEL_AH 51
+
+#define SPD_PRIORITY 1024
+
+#define XFRM_DATA_LENGTH 512
+
+
+typedef struct xfrm_data_t xfrm_data_t;
+
+/**
+ * Lenght/Type/data struct for userdata in xfrm
+ * We dont use the "I-don't-know-where-they-come-from"-structs
+ * used in the kernel.
+ */
+struct xfrm_data_t {
+ /**
+ * length of the data
+ */
+ u_int16_t length;
+
+ /**
+ * type of data
+ */
+ u_int16_t type;
+
+ /**
+ * and the data itself, for different purposes
+ */
+ union {
+ /** algorithm */
+ struct xfrm_algo algo;
+ /** policy tmpl */
+ struct xfrm_user_tmpl tmpl[2];
+ };
+};
+
+
+typedef struct netlink_message_t netlink_message_t;
+
+/**
+ * Representation of ANY netlink message used
+ */
+struct netlink_message_t {
+
+ /**
+ * header of the netlink message
+ */
+ struct nlmsghdr hdr;
+
+ union {
+ /** error message */
+ struct nlmsgerr e;
+ /** message for spi allocation */
+ struct xfrm_userspi_info spi;
+ /** message for SA manipulation */
+ struct xfrm_usersa_id sa_id;
+ /** message for SA installation */
+ struct xfrm_usersa_info sa;
+ /** message for policy manipulation */
+ struct xfrm_userpolicy_id policy_id;
+ /** message for policy installation */
+ struct xfrm_userpolicy_info policy;
+ };
+ u_int8_t data[XFRM_DATA_LENGTH];
+};
+
+
+typedef struct private_kernel_interface_t private_kernel_interface_t;
+
+ /**
+ * @brief Private Variables and Functions of kernel_interface class.
+ *
+ */
+struct private_kernel_interface_t {
+ /**
+ * Public part of the kernel_interface_t object.
+ */
+ kernel_interface_t public;
+
+ /**
+ * Netlink communication socket.
+ */
+ int socket;
+
+ /**
+ * Process id of kernel thread
+ */
+ pid_t pid;
+
+ /**
+ * Sequence number for messages.
+ */
+ u_int32_t seq;
+
+ /**
+ * List of responded messages.
+ */
+ linked_list_t *responses;
+
+ /**
+ * Thread which receives messages.
+ */
+ pthread_t thread;
+
+ /**
+ * Mutex locks access to replies list.
+ */
+ pthread_mutex_t mutex;
+
+ /**
+ * Condvar allows signaling of threads waiting for a reply.
+ */
+ pthread_cond_t condvar;
+
+ /**
+ * Logger for XFRM stuff
+ */
+ logger_t *logger;
+
+ /**
+ * Function for the thread, receives messages.
+ */
+ void (*receive_messages) (private_kernel_interface_t *this);
+
+ /**
+ * Sends a netlink_message_t down to the kernel and wait for reply.
+ */
+ status_t (*send_message) (private_kernel_interface_t *this, netlink_message_t *request, netlink_message_t **response);
+};
+
+/**
+ * In the kernel, algorithms are identified as strings, we use our
+ * mapping functions...
+ * Algorithms for encryption.
+ * TODO: Add missing algorithm strings
+ */
+mapping_t kernel_encryption_algs_m[] = {
+ {ENCR_DES_IV64, ""},
+ {ENCR_DES, "des"},
+ {ENCR_3DES, "des3_ede"},
+ {ENCR_RC5, ""},
+ {ENCR_IDEA, "idea"},
+ {ENCR_CAST, "cast128"},
+ {ENCR_BLOWFISH, "blowfish"},
+ {ENCR_3IDEA, ""},
+ {ENCR_DES_IV32, ""},
+ {ENCR_NULL, ""},
+ {ENCR_AES_CBC, "aes"},
+ {ENCR_AES_CTR, ""},
+ {MAPPING_END, NULL}
+};
+/**
+ * In the kernel, algorithms are identified as strings, we use our
+ * mapping functions...
+ * Algorithms for integrity protection.
+ * TODO: Add missing algorithm strings
+ */
+mapping_t kernel_integrity_algs_m[] = {
+ {AUTH_HMAC_MD5_96, "md5"},
+ {AUTH_HMAC_SHA1_96, "sha1"},
+ {AUTH_DES_MAC, ""},
+ {AUTH_KPDK_MD5, ""},
+ {AUTH_AES_XCBC_96, ""},
+ {MAPPING_END, NULL}
+};
+
+
+/**
+ * Implementation of kernel_interface_t.get_spi.
+ */
+static status_t get_spi(private_kernel_interface_t *this,
+ host_t *src, host_t *dest,
+ protocol_id_t protocol, u_int32_t reqid,
+ u_int32_t *spi)
+{
+ netlink_message_t request, *response;
+ status_t status = SUCCESS;
+
+
+ this->logger->log(this->logger, CONTROL|LEVEL2, "getting spi");
+
+ memset(&request, 0, sizeof(request));
+ request.hdr.nlmsg_len = NLMSG_ALIGN(NLMSG_LENGTH(sizeof(request.spi)));
+ request.hdr.nlmsg_flags = NLM_F_REQUEST;
+ request.hdr.nlmsg_type = XFRM_MSG_ALLOCSPI;
+ request.spi.info.saddr = src->get_xfrm_addr(src);
+ request.spi.info.id.daddr = dest->get_xfrm_addr(dest);
+ request.spi.info.mode = TRUE; /* tunnel mode */
+ request.spi.info.reqid = reqid;
+ request.spi.info.id.proto = (protocol == PROTO_ESP) ? KERNEL_ESP : KERNEL_AH;
+ request.spi.info.family = PF_INET;
+ request.spi.min = 0xc0000000;
+ request.spi.max = 0xcFFFFFFF;
+
+ if (this->send_message(this, &request, &response) != SUCCESS)
+ {
+ this->logger->log(this->logger, ERROR, "netlink communication failed");
+ return FAILED;
+ }
+ else if (response->hdr.nlmsg_type == NLMSG_ERROR)
+ {
+ this->logger->log(this->logger, ERROR, "netlink request XFRM_MSG_ALLOCSPI got an error: %s",
+ strerror(-response->e.error));
+ status = FAILED;
+ }
+ else if (response->hdr.nlmsg_type != XFRM_MSG_NEWSA)
+ {
+ this->logger->log(this->logger, ERROR, "netlink request XFRM_MSG_ALLOCSPI got a unknown reply");
+ status = FAILED;
+ }
+ else if (response->hdr.nlmsg_len < NLMSG_LENGTH(sizeof(response->sa)))
+ {
+ this->logger->log(this->logger, ERROR, "netlink request XFRM_MSG_ALLOCSPI got an invalid reply");
+ status = FAILED;
+ }
+ else
+ {
+ *spi = response->sa.id.spi;
+ }
+ free(response);
+
+ return status;
+}
+
+/**
+ * Implementation of kernel_interface_t.add_sa.
+ */
+static status_t add_sa( private_kernel_interface_t *this,
+ host_t *me,
+ host_t *other,
+ u_int32_t spi,
+ int protocol,
+ u_int32_t reqid,
+ encryption_algorithm_t enc_alg,
+ chunk_t encryption_key,
+ integrity_algorithm_t int_alg,
+ chunk_t integrity_key,
+ bool replace)
+{
+ netlink_message_t request, *response;
+ memset(&request, 0, sizeof(request));
+ status_t status = SUCCESS;
+
+ this->logger->log(this->logger, CONTROL|LEVEL2, "adding SA");
+
+ request.hdr.nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK;
+ request.hdr.nlmsg_type = replace ? XFRM_MSG_UPDSA : XFRM_MSG_NEWSA;
+
+ request.sa.saddr = me->get_xfrm_addr(me);
+ request.sa.id.daddr = other->get_xfrm_addr(other);
+
+ request.sa.id.spi = spi;
+ request.sa.id.proto = (protocol == PROTO_ESP) ? KERNEL_ESP : KERNEL_AH;
+ request.sa.family = me->get_family(me);
+ request.sa.mode = TRUE; /* tunnel mode */
+ request.sa.replay_window = 32;
+ request.sa.reqid = reqid;
+ request.sa.lft.soft_byte_limit = XFRM_INF;
+ request.sa.lft.soft_packet_limit = XFRM_INF;
+ request.sa.lft.hard_byte_limit = XFRM_INF;
+ request.sa.lft.hard_packet_limit = XFRM_INF;
+
+ request.hdr.nlmsg_len = NLMSG_ALIGN(NLMSG_LENGTH(sizeof(request.sa)));
+
+ if (enc_alg != ENCR_UNDEFINED)
+ {
+ xfrm_data_t *data = (xfrm_data_t*)(((u_int8_t*)&request) + request.hdr.nlmsg_len);
+
+ data->type = XFRMA_ALG_CRYPT;
+ data->length = 4 + sizeof(data->algo) + encryption_key.len;
+ data->algo.alg_key_len = encryption_key.len * 8;
+ request.hdr.nlmsg_len += data->length;
+ if (request.hdr.nlmsg_len > sizeof(request))
+ {
+ return FAILED;
+ }
+ strcpy(data->algo.alg_name, mapping_find(kernel_encryption_algs_m, enc_alg));
+ memcpy(data->algo.alg_key, encryption_key.ptr, encryption_key.len);
+ }
+
+ if (int_alg != AUTH_UNDEFINED)
+ {
+ xfrm_data_t *data = (xfrm_data_t*)(((u_int8_t*)&request) + request.hdr.nlmsg_len);
+
+ data->type = XFRMA_ALG_AUTH;
+ data->length = 4 + sizeof(data->algo) + integrity_key.len;
+ data->algo.alg_key_len = integrity_key.len * 8;
+ request.hdr.nlmsg_len += data->length;
+ if (request.hdr.nlmsg_len > sizeof(request))
+ {
+ return FAILED;
+ }
+ strcpy(data->algo.alg_name, mapping_find(kernel_integrity_algs_m, int_alg));
+ memcpy(data->algo.alg_key, integrity_key.ptr, integrity_key.len);
+ }
+
+ /* TODO: add IPComp here*/
+
+ if (this->send_message(this, &request, &response) != SUCCESS)
+ {
+ this->logger->log(this->logger, ERROR, "netlink communication failed");
+ return FAILED;
+ }
+ else if (response->hdr.nlmsg_type != NLMSG_ERROR)
+ {
+ this->logger->log(this->logger, ERROR, "netlink request XFRM_MSG_NEWSA not acknowledged");
+ status = FAILED;
+ }
+ else if (response->e.error)
+ {
+ this->logger->log(this->logger, ERROR, "netlink request XFRM_MSG_NEWSA got error %s",
+ strerror(-response->e.error));
+ status = FAILED;
+ }
+
+ free(response);
+ return status;
+}
+
+static status_t del_sa( private_kernel_interface_t *this,
+ host_t *dst,
+ u_int32_t spi,
+ protocol_id_t protocol)
+{
+ netlink_message_t request, *response;
+ memset(&request, 0, sizeof(request));
+ status_t status = SUCCESS;
+
+ this->logger->log(this->logger, CONTROL|LEVEL2, "deleting SA");
+
+ request.hdr.nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK;
+ request.hdr.nlmsg_type = XFRM_MSG_DELSA;
+
+ request.sa_id.daddr = dst->get_xfrm_addr(dst);
+
+ request.sa_id.spi = spi;
+ request.sa_id.proto = (protocol == PROTO_ESP) ? KERNEL_ESP : KERNEL_AH;
+ request.sa_id.family = dst->get_family(dst);
+
+ request.hdr.nlmsg_len = NLMSG_ALIGN(NLMSG_LENGTH(sizeof(request.sa_id)));
+
+ if (this->send_message(this, &request, &response) != SUCCESS)
+ {
+ return FAILED;
+ }
+ else if (response->hdr.nlmsg_type != NLMSG_ERROR)
+ {
+ status = FAILED;
+ }
+ else if (response->e.error)
+ {
+ status = FAILED;
+ }
+
+ free(response);
+ return status;
+}
+
+/**
+ * Implementation of kernel_interface_t.add_policy.
+ */
+static status_t add_policy(private_kernel_interface_t *this,
+ host_t *me, host_t *other,
+ host_t *src, host_t *dst,
+ u_int8_t src_hostbits, u_int8_t dst_hostbits,
+ int direction, int upper_proto,
+ bool ah, bool esp,
+ u_int32_t reqid)
+{
+ netlink_message_t request, *response;
+ status_t status = SUCCESS;
+
+ this->logger->log(this->logger, CONTROL|LEVEL2, "adding policy");
+
+ memset(&request, 0, sizeof(request));
+ request.hdr.nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK;
+
+ request.policy.sel.sport = htons(src->get_port(src));
+ request.policy.sel.dport = htons(dst->get_port(dst));
+ request.policy.sel.sport_mask = (request.policy.sel.sport) ? ~0 : 0;
+ request.policy.sel.dport_mask = (request.policy.sel.dport) ? ~0 : 0;
+ request.policy.sel.saddr = src->get_xfrm_addr(src);
+ request.policy.sel.daddr = dst->get_xfrm_addr(dst);
+ request.policy.sel.prefixlen_s = src_hostbits;
+ request.policy.sel.prefixlen_d = dst_hostbits;
+ request.policy.sel.proto = upper_proto;
+ request.policy.sel.family = src->get_family(src);
+
+ request.hdr.nlmsg_type = XFRM_MSG_NEWPOLICY;
+ request.hdr.nlmsg_len = NLMSG_ALIGN(NLMSG_LENGTH(sizeof(request.policy)));
+
+ request.policy.dir = direction;
+ request.policy.priority = SPD_PRIORITY;
+ request.policy.action = XFRM_POLICY_ALLOW;
+ request.policy.share = XFRM_SHARE_ANY;
+
+ request.policy.lft.soft_byte_limit = XFRM_INF;
+ request.policy.lft.soft_packet_limit = XFRM_INF;
+ request.policy.lft.hard_byte_limit = XFRM_INF;
+ request.policy.lft.hard_packet_limit = XFRM_INF;
+
+ if (esp || ah)
+ {
+ xfrm_data_t *data;
+ int tmpl_pos = 0;
+ data = (xfrm_data_t*)(((u_int8_t*)&request) + request.hdr.nlmsg_len);
+ data->type = XFRMA_TMPL;
+ if (esp)
+ {
+ data->tmpl[tmpl_pos].reqid = reqid;
+ data->tmpl[tmpl_pos].id.proto = KERNEL_ESP;
+ data->tmpl[tmpl_pos].aalgos = data->tmpl[tmpl_pos].ealgos = data->tmpl[tmpl_pos].calgos = ~0;
+ data->tmpl[tmpl_pos].mode = TRUE;
+
+ data->tmpl[tmpl_pos].saddr = me->get_xfrm_addr(me);
+ data->tmpl[tmpl_pos].id.daddr = me->get_xfrm_addr(other);
+
+ tmpl_pos++;
+ }
+ if (ah)
+ {
+ data->tmpl[tmpl_pos].reqid = reqid;
+ data->tmpl[tmpl_pos].id.proto = KERNEL_AH;
+ data->tmpl[tmpl_pos].aalgos = data->tmpl[tmpl_pos].ealgos = data->tmpl[tmpl_pos].calgos = ~0;
+ data->tmpl[tmpl_pos].mode = TRUE;
+
+ data->tmpl[tmpl_pos].saddr = me->get_xfrm_addr(me);
+ data->tmpl[tmpl_pos].id.daddr = other->get_xfrm_addr(other);
+
+ tmpl_pos++;
+ }
+ data->length = 4 + sizeof(struct xfrm_user_tmpl) * tmpl_pos;
+ request.hdr.nlmsg_len += data->length;
+ }
+
+ if (this->send_message(this, &request, &response) != SUCCESS)
+ {
+ this->logger->log(this->logger, ERROR, "netlink communication failed");
+ return FAILED;
+ }
+ else if (response->hdr.nlmsg_type != NLMSG_ERROR)
+ {
+ this->logger->log(this->logger, ERROR, "netlink request XFRM_MSG_NEWPOLICY not acknowledged");
+ status = FAILED;
+ }
+ else if (response->e.error)
+ {
+ this->logger->log(this->logger, ERROR, "netlink request XFRM_MSG_NEWPOLICY got error %s",
+ strerror(-response->e.error));
+ status = FAILED;
+ }
+
+ free(response);
+ return status;
+}
+
+/**
+ * Implementation of kernel_interface_t.del_policy.
+ */
+static status_t del_policy(private_kernel_interface_t *this,
+ host_t *me, host_t *other,
+ host_t *src, host_t *dst,
+ u_int8_t src_hostbits, u_int8_t dst_hostbits,
+ int direction, int upper_proto)
+{
+ netlink_message_t request, *response;
+ status_t status = SUCCESS;
+
+
+ this->logger->log(this->logger, CONTROL|LEVEL2, "deleting policy");
+
+ memset(&request, 0, sizeof(request));
+ request.hdr.nlmsg_flags = NLM_F_REQUEST | NLM_F_ACK;
+
+ request.policy_id.sel.sport = htons(src->get_port(src));
+ request.policy_id.sel.dport = htons(dst->get_port(dst));
+ request.policy_id.sel.sport_mask = (request.policy.sel.sport) ? ~0 : 0;
+ request.policy_id.sel.dport_mask = (request.policy.sel.dport) ? ~0 : 0;
+ request.policy_id.sel.saddr = src->get_xfrm_addr(src);
+ request.policy_id.sel.daddr = dst->get_xfrm_addr(dst);
+ request.policy_id.sel.prefixlen_s = src_hostbits;
+ request.policy_id.sel.prefixlen_d = dst_hostbits;
+ request.policy_id.sel.proto = upper_proto;
+ request.policy_id.sel.family = src->get_family(src);
+
+ request.policy_id.dir = direction;
+
+ request.hdr.nlmsg_type = XFRM_MSG_DELPOLICY;
+ request.hdr.nlmsg_len = NLMSG_ALIGN(NLMSG_LENGTH(sizeof(request.policy_id)));
+
+ if (this->send_message(this, &request, &response) != SUCCESS)
+ {
+ return FAILED;
+ }
+ else if (response->hdr.nlmsg_type != NLMSG_ERROR)
+ {
+ status = FAILED;
+ }
+ else if (response->e.error)
+ {
+ status = FAILED;
+ }
+
+ free(response);
+ return status;
+}
+
+/**
+ * Implementation of private_kernel_interface_t.send_message.
+ */
+static status_t send_message(private_kernel_interface_t *this, netlink_message_t *request, netlink_message_t **response)
+{
+ size_t length;
+ struct sockaddr_nl addr;
+
+ request->hdr.nlmsg_seq = ++this->seq;
+ request->hdr.nlmsg_pid = this->pid;
+
+ memset(&addr, 0, sizeof(struct sockaddr_nl));
+ addr.nl_family = AF_NETLINK;
+ addr.nl_pid = 0;
+ addr.nl_groups = 0;
+
+ length = sendto(this->socket,(void *)request, request->hdr.nlmsg_len, 0, (struct sockaddr *)&addr, sizeof(addr));
+
+ if (length < 0)
+ {
+ return FAILED;
+ }
+ else if (length != request->hdr.nlmsg_len)
+ {
+ return FAILED;
+ }
+
+ pthread_mutex_lock(&(this->mutex));
+
+ while (TRUE)
+ {
+ iterator_t *iterator;
+ bool found = FALSE;
+ /* search list, break if found */
+ iterator = this->responses->create_iterator(this->responses, TRUE);
+ while (iterator->has_next(iterator))
+ {
+ netlink_message_t *listed_response;
+ iterator->current(iterator, (void**)&listed_response);
+ if (listed_response->hdr.nlmsg_seq == request->hdr.nlmsg_seq)
+ {
+ /* matches our request, this is the reply */
+ *response = listed_response;
+ found = TRUE;
+ break;
+ }
+ }
+ iterator->destroy(iterator);
+
+ if (found)
+ {
+ break;
+ }
+ /* TODO: we should time out, if something goes wrong!??? */
+ pthread_cond_wait(&(this->condvar), &(this->mutex));
+ }
+
+ pthread_mutex_unlock(&(this->mutex));
+
+ return SUCCESS;
+}
+
+/**
+ * Implementation of private_kernel_interface_t.receive_messages.
+ */
+static void receive_messages(private_kernel_interface_t *this)
+{
+ while(TRUE)
+ {
+ netlink_message_t response, *listed_response;
+ while (TRUE)
+ {
+ struct sockaddr_nl addr;
+ socklen_t addr_length;
+ size_t length;
+
+ addr_length = sizeof(addr);
+
+ response.hdr.nlmsg_type = XFRM_MSG_NEWSA;
+ length = recvfrom(this->socket, &response, sizeof(response), 0, (struct sockaddr*)&addr, &addr_length);
+ if (length < 0)
+ {
+ if (errno == EINTR)
+ {
+ /* interrupted, try again */
+ continue;
+ }
+ charon->kill(charon, "receiving from netlink socket failed");
+ }
+ if (!NLMSG_OK(&response.hdr, length))
+ {
+ /* bad netlink message */
+ continue;
+ }
+ if (addr.nl_pid != 0)
+ {
+ /* not from kernel. not interested, try another one */
+ continue;
+ }
+ break;
+ }
+
+ /* got a valid message.
+ * requests are handled on our own,
+ * responses are listed for the requesters
+ */
+ if (response.hdr.nlmsg_flags & NLM_F_REQUEST)
+ {
+ /* handle request */
+ }
+ else
+ {
+ /* add response to queue */
+ listed_response = malloc(sizeof(response));
+ memcpy(listed_response, &response, sizeof(response));
+
+ pthread_mutex_lock(&(this->mutex));
+ this->responses->insert_last(this->responses, (void*)listed_response);
+ pthread_mutex_unlock(&(this->mutex));
+ /* signal ALL waiting threads */
+ pthread_cond_broadcast(&(this->condvar));
+ }
+ /* get the next one */
+ }
+}
+
+/**
+ * Implementation of kernel_interface_t.destroy.
+ */
+static void destroy(private_kernel_interface_t *this)
+{
+ pthread_cancel(this->thread);
+ pthread_join(this->thread, NULL);
+ close(this->socket);
+ this->responses->destroy(this->responses);
+ free(this);
+}
+
+/*
+ * Described in header.
+ */
+kernel_interface_t *kernel_interface_create()
+{
+ private_kernel_interface_t *this = malloc_thing(private_kernel_interface_t);
+
+ /* public functions */
+ this->public.get_spi = (status_t(*)(kernel_interface_t*,host_t*,host_t*,protocol_id_t,u_int32_t,u_int32_t*))get_spi;
+ this->public.add_sa = (status_t(*)(kernel_interface_t *,host_t*,host_t*,u_int32_t,protocol_id_t,u_int32_t,encryption_algorithm_t,chunk_t,integrity_algorithm_t,chunk_t,bool))add_sa;
+ this->public.add_policy = (status_t(*)(kernel_interface_t*,host_t*, host_t*,host_t*,host_t*,u_int8_t,u_int8_t,int,int,bool,bool,u_int32_t))add_policy;
+ this->public.del_sa = (status_t(*)(kernel_interface_t*,host_t*,u_int32_t,protocol_id_t))del_sa;
+ this->public.del_policy = (status_t(*)(kernel_interface_t*,host_t*,host_t*,host_t*,host_t*,u_int8_t,u_int8_t,int,int))del_policy;
+
+ this->public.destroy = (void(*)(kernel_interface_t*)) destroy;
+
+ /* private members */
+ this->receive_messages = receive_messages;
+ this->send_message = send_message;
+ this->pid = getpid();
+ this->responses = linked_list_create();
+ this->logger = logger_manager->get_logger(logger_manager, XFRM);
+ pthread_mutex_init(&(this->mutex),NULL);
+ pthread_cond_init(&(this->condvar),NULL);
+ this->seq = 0;
+ this->socket = socket(PF_NETLINK, SOCK_RAW, NETLINK_XFRM);
+ if (this->socket <= 0)
+ {
+ this->responses->destroy(this->responses);
+ free(this);
+ charon->kill(charon, "Unable to create netlink socket");
+ }
+
+ if (pthread_create(&(this->thread), NULL, (void*(*)(void*))this->receive_messages, this) != 0)
+ {
+ this->responses->destroy(this->responses);
+ close(this->socket);
+ free(this);
+ charon->kill(charon, "Unable to create netlink thread");
+ }
+
+ return (&this->public);
+}
generated by cgit v1.2.3 (git 2.25.1) at 2025-07-21 13:07:23 +0000