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-rw-r--r--src/lib/sockets.c319
1 files changed, 319 insertions, 0 deletions
diff --git a/src/lib/sockets.c b/src/lib/sockets.c
new file mode 100644
index 00000000..ef4b3a47
--- /dev/null
+++ b/src/lib/sockets.c
@@ -0,0 +1,319 @@
+/*
+ * Ouroboros - Copyright (C) 2016
+ *
+ * The sockets layer to communicate between daemons
+ *
+ * Sander Vrijders <sander.vrijders@intec.ugent.be>
+ *
+ * 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.
+ *
+ * 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; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#define OUROBOROS_PREFIX "libouroboros-sockets"
+
+#include <ouroboros/logs.h>
+#include <ouroboros/common.h>
+#include <ouroboros/sockets.h>
+#include <sys/socket.h>
+#include <sys/un.h>
+#include <sys/stat.h>
+#include <string.h>
+#include <malloc.h>
+
+#define BUFFER_SIZE 256
+
+int client_socket_open(char * file_name)
+{
+ int sockfd;
+ struct sockaddr_un serv_addr;
+
+ sockfd = socket(AF_UNIX, SOCK_STREAM, 0);
+ if (sockfd < 0) {
+ LOG_ERR("Failed to open socket");
+ return -1;
+ }
+
+ serv_addr.sun_family = AF_UNIX;
+ sprintf(serv_addr.sun_path, "%s", file_name);
+
+ if (connect(sockfd,
+ (struct sockaddr *) &serv_addr,
+ sizeof(serv_addr))) {
+ LOG_ERR("Failed to connect to server");
+ return -1;
+ }
+
+ return sockfd;
+}
+
+int server_socket_open(char * file_name)
+{
+ int sockfd;
+ struct sockaddr_un serv_addr;
+ struct stat sb;
+
+ if (!stat(file_name, &sb)) {
+ /* File exists */
+ if (unlink(file_name)) {
+ LOG_ERR("Failed to unlink filename: %s",
+ strerror(errno));
+ return -1;
+ }
+ }
+
+ sockfd = socket(AF_UNIX, SOCK_STREAM, 0);
+ if (sockfd < 0) {
+ LOG_ERR("Failed to open socket");
+ return -1;
+ }
+
+ serv_addr.sun_family = AF_UNIX;
+ sprintf(serv_addr.sun_path, "%s", file_name);
+
+ if (bind(sockfd,
+ (struct sockaddr *) &serv_addr,
+ sizeof(serv_addr))) {
+ LOG_ERR("Failed to bind socket");
+ return -1;
+ }
+
+ if (listen(sockfd, 0)) {
+ LOG_ERR("Failed to listen to socket");
+ return -1;
+ }
+
+ return sockfd;
+}
+
+static int serialized_string_len(uint8_t * data)
+{
+ uint8_t * seek = data;
+
+ while (*seek != '\0')
+ seek++;
+
+ return (seek - data) + 1;
+}
+
+static void ser_copy_value(size_t flen,
+ void * dst,
+ void * src,
+ int * offset)
+{
+ memcpy(dst + *offset, src, flen);
+ *offset += flen;
+}
+
+static void deser_copy_value(size_t flen,
+ void * dst,
+ void * src,
+ int * offset)
+{
+ memcpy(dst, src + *offset, flen);
+ *offset += flen;
+}
+
+static int deser_copy_string(uint8_t * data,
+ char ** dst,
+ int * offset)
+{
+ size_t flen;
+
+ flen = serialized_string_len(data + *offset);
+ *dst = malloc(sizeof(**dst) * (flen + 1));
+ if (*dst == NULL)
+ return -1;
+ deser_copy_value(flen, *dst, data, offset);
+ return 0;
+}
+
+static void deser_copy_int(uint8_t * data,
+ int * dst,
+ int * offset)
+{
+ *dst = 0;
+ deser_copy_value(sizeof(int), dst, data, offset);
+}
+
+static void deser_copy_enum(uint8_t * data,
+ enum irm_msg_code * dst,
+ int * offset)
+{
+ *dst = 0;
+ deser_copy_value(sizeof(enum irm_msg_code), dst, data, offset);
+}
+
+buffer_t * serialize_irm_msg(struct irm_msg * msg)
+{
+ buffer_t * buf;
+ uint8_t * data;
+ int offset = 0;
+ int i;
+ char buffer[BUFFER_SIZE];
+
+ buf = malloc(sizeof(*buf));
+ if (buf == NULL)
+ return NULL;
+
+ buf->data = malloc(BUFFER_SIZE);
+ if (buf->data == NULL) {
+ free(buf);
+ return NULL;
+ }
+
+ data = buf->data;
+
+ ser_copy_value(sizeof(enum irm_msg_code),
+ data,
+ &msg->code,
+ &offset);
+
+ switch (msg->code) {
+ case IRM_CREATE_IPCP:
+ if (!msg->msgs.create_ipcp.name ||
+ !msg->msgs.create_ipcp.name->ap_name ||
+ !msg->msgs.create_ipcp.name->ae_name ||
+ !msg->msgs.create_ipcp.ipcp_type) {
+ LOG_ERR("Null pointer passed");
+ free(buf->data);
+ free(buf);
+ return NULL;
+ }
+
+ ser_copy_value(strlen(msg->msgs.create_ipcp.name->ap_name) + 1,
+ data,
+ msg->msgs.create_ipcp.name->ap_name,
+ &offset);
+
+ ser_copy_value(sizeof(int),
+ data,
+ &msg->msgs.create_ipcp.name->api_id,
+ &offset);
+
+ ser_copy_value(strlen(msg->msgs.create_ipcp.name->ae_name) + 1,
+ data,
+ msg->msgs.create_ipcp.name->ae_name,
+ &offset);
+
+ ser_copy_value(sizeof(int),
+ data,
+ &msg->msgs.create_ipcp.name->aei_id,
+ &offset);
+
+ ser_copy_value(strlen(msg->msgs.create_ipcp.ipcp_type) + 1,
+ data,
+ msg->msgs.create_ipcp.ipcp_type,
+ &offset);
+ break;
+ default:
+ LOG_ERR("Don't know that code");
+ free(buf->data);
+ free(buf);
+ return NULL;
+ }
+
+ buf->size = offset;
+
+ for (i = 0; i < buf->size; i++) {
+ if (i > 0) sprintf(buffer + strlen(buffer), ":");
+ sprintf(buffer + strlen(buffer), "%02X", data[i]);
+ }
+ LOG_DBGF("Serialized buffer to %s", buffer);
+
+ return buf;
+}
+
+struct irm_msg * deserialize_irm_msg(buffer_t * data)
+{
+ struct irm_msg * msg;
+ char buffer[BUFFER_SIZE];
+ int i;
+ int offset = 0;
+
+ if (data == NULL ||
+ data->data == NULL) {
+ LOG_ERR("Got a null pointer");
+ return NULL;
+ }
+
+ memset(buffer, 0, sizeof(buffer));
+ for (i = 0; i < data->size; i++) {
+ if (i > 0) sprintf(buffer + strlen(buffer), ":");
+ sprintf(buffer + strlen(buffer), "%02X", data->data[i]);
+ }
+ LOG_DBGF("Got buffer %s", buffer);
+
+ msg = malloc(sizeof(*msg));
+ if (msg == NULL) {
+ LOG_ERR("Failed to allocate memory");
+ return NULL;
+ }
+
+ deser_copy_enum(data->data,
+ &msg->code,
+ &offset);
+
+ switch (msg->code) {
+ case IRM_CREATE_IPCP:
+ msg->msgs.create_ipcp.name =
+ malloc(sizeof(*(msg->msgs.create_ipcp.name)));
+ if (!msg->msgs.create_ipcp.name) {
+ LOG_ERR("Failed to alloc memory");
+ free(msg);
+ return NULL;
+ }
+
+ if (deser_copy_string(data->data,
+ &msg->msgs.create_ipcp.name->ap_name,
+ &offset)) {
+ free(msg->msgs.create_ipcp.name);
+ free(msg);
+ return NULL;
+ }
+
+ deser_copy_int(data->data,
+ &msg->msgs.create_ipcp.name->api_id,
+ &offset);
+
+ if (deser_copy_string(data->data,
+ &msg->msgs.create_ipcp.name->ae_name,
+ &offset)) {
+ free(msg->msgs.create_ipcp.name->ap_name);
+ free(msg->msgs.create_ipcp.name);
+ free(msg);
+ return NULL;
+ }
+
+ deser_copy_int(data->data,
+ &msg->msgs.create_ipcp.name->aei_id,
+ &offset);
+
+ if (deser_copy_string(data->data,
+ &msg->msgs.create_ipcp.ipcp_type,
+ &offset)) {
+ free(msg->msgs.create_ipcp.name->ae_name);
+ free(msg->msgs.create_ipcp.name->ap_name);
+ free(msg->msgs.create_ipcp.name);
+ free(msg);
+ return NULL;
+ }
+ break;
+ default:
+ LOG_ERR("Don't know that code");
+ free(msg);
+ return NULL;
+ }
+
+ return msg;
+}
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