Allow the CSTP layer to operate without TLS

That also introduces a unix domain socket under which connections to the
server can occur.

doc/sample.config

@@ -49,6 +49,10 @@ max-same-clients = 2
 tcp-port = 443
 udp-port = 443
 
+# Accept connections using a socket file. The connections are
+# forwarded without SSL/TLS.
+unix-conn-file = /var/run/ocserv-conn.socket
+
 # Keepalive in seconds
 keepalive = 32400
 

src/config.c

@@ -82,6 +82,7 @@ static struct cfg_options available_options[] = {
 	{ .name = "disconnect-script", .type = OPTION_STRING, .mandatory = 0 },
 	{ .name = "pid-file", .type = OPTION_STRING, .mandatory = 0 },
 	{ .name = "socket-file", .type = OPTION_STRING, .mandatory = 1 },
+	{ .name = "unix-conn-file", .type = OPTION_STRING, .mandatory = 0 },
 	{ .name = "occtl-socket-file", .type = OPTION_STRING, .mandatory = 0 },
 	{ .name = "banner", .type = OPTION_STRING, .mandatory = 0 },
 	{ .name = "use-seccomp", .type = OPTION_BOOLEAN, .mandatory = 0 },
@@ -436,6 +437,7 @@ unsigned force_cert_auth;
 	if (reload == 0 && pid_file[0] == 0)
 		READ_STATIC_STRING("pid-file", pid_file);
 
+	READ_STRING("unix-conn-file", config->unix_conn_file);
 	READ_STRING("socket-file", config->socket_file_prefix);
 	READ_STRING("occtl-socket-file", config->occtl_socket_file);
 	if (config->occtl_socket_file == NULL)

src/main.c

@@ -31,6 +31,8 @@
 #include <errno.h>
 #include <sys/ioctl.h>
 #include <sys/resource.h>
+#include <sys/types.h>
+#include <sys/stat.h>
 #include <cloexec.h>
 #ifdef HAVE_MALLOC_TRIM
 # include <malloc.h> /* for malloc_trim() */
@@ -90,7 +92,7 @@ static void add_listener(void *pool, struct listen_list_st *list,
 	tmp = talloc_zero(pool, struct listener_st);
 	tmp->fd = fd;
 	tmp->family = family;
-	tmp->socktype = socktype;
+	tmp->sock_type = socktype;
 	tmp->protocol = protocol;
 	
 	tmp->addr_len = addr_len;
@@ -135,12 +137,13 @@ int val;
 
 static 
 int _listen_ports(void *pool, struct cfg_st* config, 
-		struct addrinfo *res, struct listen_list_st *list)
+		struct addrinfo *res, struct listen_list_st *list, int udp)
 {
 	struct addrinfo *ptr;
-	int s, y;
+	int s, y, e, ret;
 	const char* type = NULL;
 	char buf[512];
+	struct sockaddr_un sa;
 
 	for (ptr = res; ptr != NULL; ptr = ptr->ai_next) {
 		if (ptr->ai_family != AF_INET && ptr->ai_family != AF_INET6)
@@ -193,7 +196,7 @@ int _listen_ports(void *pool, struct cfg_st* config,
 		}
 
 		if (ptr->ai_socktype == SOCK_STREAM) {
-			if (listen(s, 10) < 0) {
+			if (listen(s, 1024) < 0) {
 				perror("listen() failed");
 				force_close(s);
 				return -1;
@@ -202,11 +205,55 @@ int _listen_ports(void *pool, struct cfg_st* config,
 
 		set_common_socket_options(s);
 		
-		add_listener(pool, list, s, ptr->ai_family, ptr->ai_socktype,
+		add_listener(pool, list, s, ptr->ai_family, ptr->ai_socktype==SOCK_STREAM?SOCK_TYPE_TCP:SOCK_TYPE_UDP,
 			ptr->ai_protocol, ptr->ai_addr, ptr->ai_addrlen);
 
 	}
 
+	/* open the UNIX domain socket to accept connections */
+	if (udp == 0 && config->unix_conn_file) {
+		memset(&sa, 0, sizeof(sa));
+		sa.sun_family = AF_UNIX;
+		snprintf(sa.sun_path, sizeof(sa.sun_path), "%s", config->unix_conn_file);
+		remove(sa.sun_path);
+
+		if (config->foreground != 0)
+			fprintf(stderr, "listening (UNIX) on %s...\n",
+				sa.sun_path);
+
+		s = socket(AF_UNIX, SOCK_STREAM, 0);
+		if (s == -1) {
+			e = errno;
+			fprintf(stderr, "could not create socket '%s': %s", sa.sun_path,
+			       strerror(e));
+			return -1;
+		}
+
+		umask(066);
+		ret = bind(s, (struct sockaddr *)&sa, SUN_LEN(&sa));
+		if (ret == -1) {
+			e = errno;
+			fprintf(stderr, "could not bind socket '%s': %s", sa.sun_path,
+			       strerror(e));
+			return -1;
+		}
+
+		ret = chown(sa.sun_path, config->uid, config->gid);
+		if (ret == -1) {
+			e = errno;
+			fprintf(stderr, "could not chown socket '%s': %s", sa.sun_path,
+			       strerror(e));
+		}
+
+		ret = listen(s, 1024);
+		if (ret == -1) {
+			e = errno;
+			fprintf(stderr, "could not listen to socket '%s': %s",
+			       sa.sun_path, strerror(e));
+			exit(1);
+		}
+		add_listener(pool, list, s, AF_UNIX, SOCK_TYPE_UNIX, 0, (struct sockaddr *)&sa, sizeof(sa));
+	}
 	fflush(stderr);
 
 	return 0;
@@ -280,7 +327,7 @@ listen_ports(void *pool, struct cfg_st* config,
 					config->udp_port = ntohs(((struct sockaddr_in6*)&tmp_sock)->sin6_port);
 			}
 
-			add_listener(pool, list, fd, family, type, 0, (struct sockaddr*)&tmp_sock, tmp_sock_len);
+			add_listener(pool, list, fd, family, type==SOCK_STREAM?SOCK_TYPE_TCP:SOCK_TYPE_UDP, 0, (struct sockaddr*)&tmp_sock, tmp_sock_len);
 		}
 
 		if (list->total == 0) {
@@ -317,7 +364,7 @@ listen_ports(void *pool, struct cfg_st* config,
 		return -1;
 	}
 
-	ret = _listen_ports(pool, config, res, list);
+	ret = _listen_ports(pool, config, res, list, 0);
 	if (ret < 0) {
 		return -1;
 	}
@@ -347,7 +394,7 @@ listen_ports(void *pool, struct cfg_st* config,
 			return -1;
 		}
 
-		ret = _listen_ports(pool, config, res, list);
+		ret = _listen_ports(pool, config, res, list, 1);
 		if (ret < 0) {
 			return -1;
 		}
@@ -371,7 +418,7 @@ int s, y, e;
 	force_close(l->fd);
 	l->fd = -1;
 
-	s = socket(l->family, l->socktype, l->protocol);
+	s = socket(l->family, SOCK_DGRAM, l->protocol);
 	if (s < 0) {
 		perror("socket() failed");
 		return -1;
@@ -1039,8 +1086,10 @@ int main(int argc, char** argv)
 		/* Check for new connections to accept */
 		list_for_each(&s->listen_list.head, ltmp, list) {
 			set = FD_ISSET(ltmp->fd, &rd_set);
-			if (set && ltmp->socktype == SOCK_STREAM) {
+			if (set && (ltmp->sock_type == SOCK_TYPE_TCP || ltmp->sock_type == SOCK_TYPE_UNIX)) {
 				/* connection on TCP port */
+				int stype = ltmp->sock_type;
+
 				ws->remote_addr_len = sizeof(ws->remote_addr);
 				fd = accept(ltmp->fd, (void*)&ws->remote_addr, &ws->remote_addr_len);
 				if (fd < 0) {
@@ -1095,6 +1144,7 @@ int main(int argc, char** argv)
 					ws->tun_fd = -1;
 					ws->udp_fd = -1;
 					ws->conn_fd = fd;
+					ws->conn_type = stype;
 					ws->creds = &creds;
 
 					/* Drop privileges after this point */
@@ -1132,7 +1182,7 @@ fork_failed:
 
 				if (s->config->rate_limit_ms > 0)
 					ms_sleep(s->config->rate_limit_ms);
-			} else if (set && ltmp->socktype == SOCK_DGRAM) {
+			} else if (set && ltmp->sock_type == SOCK_TYPE_UDP) {
 				/* connection on UDP port */
 				ret = forward_udp_to_owner(s, ltmp);
 				if (ret < 0) {

src/main.h

@@ -52,7 +52,7 @@ extern unsigned int need_maintenance;
 struct listener_st {
 	struct list_node list;
 	int fd;
-	int socktype;
+	sock_type_t sock_type;
 
 	struct sockaddr_storage addr; /* local socket address */
 	socklen_t addr_len;

src/ocserv-args.def

@@ -124,6 +124,10 @@ max-same-clients = 2
 tcp-port = 3333
 udp-port = 3333
 
+# Accept connections using a socket file. The connections are
+# forwarded without SSL/TLS.
+#unix-conn-file = /var/run/ocserv-conn.socket
+
 # Keepalive in seconds
 keepalive = 32400
 

src/tlslib.c

@@ -41,56 +41,64 @@
 #include <common.h>
 #include <sys/un.h>
 #include <sys/uio.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <netinet/tcp.h>
 #include <c-ctype.h>
 
-ssize_t tls_send(gnutls_session_t session, const void *data,
+void cstp_cork(worker_st *ws)
+{
+	if (ws->session) {
+		gnutls_record_cork(ws->session);
+	} else {
+#ifdef __linux__
+		int state = 1;
+		setsockopt(ws->conn_fd, IPPROTO_TCP, TCP_CORK, &state, sizeof(state));
+#endif
+	}
+}
+
+int cstp_uncork(worker_st *ws)
+{
+	if (ws->session) {
+		return gnutls_record_uncork(ws->session, GNUTLS_RECORD_WAIT);
+	} else {
+#ifdef __linux__
+		int state = 0;
+		setsockopt(ws->conn_fd, IPPROTO_TCP, TCP_CORK, &state, sizeof(state));
+#endif
+		return 0;
+	}
+}
+
+
+ssize_t cstp_send(worker_st *ws, const void *data,
 			size_t data_size)
 {
 	int ret;
 	int left = data_size;
 	const uint8_t* p = data;
 
-	while(left > 0) {
-		ret = gnutls_record_send(session, p, data_size);
-		if (ret < 0 && (ret != GNUTLS_E_AGAIN && ret != GNUTLS_E_INTERRUPTED)) {
-			return ret;
-		}
+	if (ws->session != NULL) {
+		while(left > 0) {
+			ret = gnutls_record_send(ws->session, p, data_size);
+			if (ret < 0 && (ret != GNUTLS_E_AGAIN && ret != GNUTLS_E_INTERRUPTED)) {
+				return ret;
+			}
 
-		if (ret > 0) {
-			left -= ret;
-			p += ret;
+			if (ret > 0) {
+				left -= ret;
+				p += ret;
+			}
 		}
+		return data_size;
+	} else {
+		return force_write(ws->conn_fd, data, data_size);
 	}
-
-	return data_size;
 }
 
-/* Same as tls_send() but will not retry on EAGAIN errors */
-ssize_t tls_send_nb(gnutls_session_t session, const void *data,
-			size_t data_size)
-{
-	int ret;
-	int left = data_size;
-	const uint8_t* p = data;
-
-	while(left > 0) {
-		ret = gnutls_record_send(session, p, data_size);
-		if (ret < 0 && ret != GNUTLS_E_INTERRUPTED) {
-			if (ret == GNUTLS_E_AGAIN)
-			  return data_size;
-			return ret;
-		}
-
-		if (ret > 0) {
-			left -= ret;
-			p += ret;
-		}
-	}
-
-	return data_size;
-}
-
-ssize_t tls_send_file(gnutls_session_t session, const char *file)
+ssize_t cstp_send_file(worker_st *ws, const char *file)
 {
 FILE* fp;
 char buf[512];
@@ -102,8 +110,8 @@ int ret;
 		return GNUTLS_E_FILE_ERROR;
 
 	while (	(len = fread( buf, 1, sizeof(buf), fp)) > 0) {
-		ret = tls_send(session, buf, len);
-		GNUTLS_FATAL_ERR(ret);
+		ret = cstp_send(ws, buf, len);
+		FATAL_ERR(ws, ret);
 
 		total += ret;
 	}
@@ -113,13 +121,30 @@ int ret;
 	return total;
 }
 
-ssize_t tls_recv(gnutls_session_t session, void *data, size_t data_size)
+ssize_t cstp_recv(worker_st *ws, void *data, size_t data_size)
 {
 	int ret;
 
-	do {
-		ret = gnutls_record_recv(session, data, data_size);
-	} while (ret < 0 && (ret == GNUTLS_E_INTERRUPTED || ret == GNUTLS_E_AGAIN));
+	if (ws->session != NULL) {
+		do {
+			ret = gnutls_record_recv(ws->session, data, data_size);
+		} while (ret < 0 && (ret == GNUTLS_E_INTERRUPTED || ret == GNUTLS_E_AGAIN));
+	} else {
+		ret = force_read_timeout(ws->conn_fd, data, data_size, 10);
+	}
+
+	return ret;
+}
+
+ssize_t cstp_recv_nb(worker_st *ws, void *data, size_t data_size)
+{
+	int ret;
+
+	if (ws->session != NULL) {
+		ret = gnutls_record_recv(ws->session, data, data_size);
+	} else {
+		ret = recv(ws->conn_fd, data, data_size, 0);
+	}
 
 	return ret;
 }
@@ -132,6 +157,9 @@ unsigned tls_has_session_cert(struct worker_st * ws)
 	unsigned int list_size = 0;
 	const gnutls_datum_t * certs;
 
+	if (ws->session == NULL)
+		return 0;
+
 	if (ws->cert_auth_ok)
 		return 1;
 
@@ -147,7 +175,7 @@ unsigned tls_has_session_cert(struct worker_st * ws)
 }
 
 int __attribute__ ((format(printf, 2, 3)))
-    tls_printf(gnutls_session_t session, const char *fmt, ...)
+    cstp_printf(worker_st *ws, const char *fmt, ...)
 {
 	char buf[1024];
 	va_list args;
@@ -158,21 +186,57 @@ int __attribute__ ((format(printf, 2, 3)))
 	va_start(args, fmt);
 	s = vsnprintf(buf, 1023, fmt, args);
 	va_end(args);
-	return tls_send(session, buf, s);
+	return cstp_send(ws, buf, s);
 
 }
 
-void tls_close(gnutls_session_t session)
+void cstp_close(worker_st *ws)
 {
-	gnutls_bye(session, GNUTLS_SHUT_WR);
-	gnutls_deinit(session);
+	if (ws->session) {
+		gnutls_bye(ws->session, GNUTLS_SHUT_WR);
+		gnutls_deinit(ws->session);
+	} else {
+		force_close(ws->conn_fd);
+	}
 }
 
-void tls_fatal_close(gnutls_session_t session,
+void cstp_fatal_close(worker_st *ws,
 			    gnutls_alert_description_t a)
 {
-	gnutls_alert_send(session, GNUTLS_AL_FATAL, a);
-	gnutls_deinit(session);
+	if (ws->session) {
+		gnutls_alert_send(ws->session, GNUTLS_AL_FATAL, a);
+		gnutls_deinit(ws->session);
+	} else {
+		force_close(ws->conn_fd);
+	}
+}
+
+ssize_t dtls_send(worker_st *ws, const void *data,
+			size_t data_size)
+{
+	int ret;
+	int left = data_size;
+	const uint8_t* p = data;
+
+	while(left > 0) {
+		ret = gnutls_record_send(ws->dtls_session, p, data_size);
+		if (ret < 0 && (ret != GNUTLS_E_AGAIN && ret != GNUTLS_E_INTERRUPTED)) {
+			return ret;
+		}
+
+		if (ret > 0) {
+			left -= ret;
+			p += ret;
+		}
+	}
+
+	return data_size;
+}
+
+void dtls_close(worker_st *ws)
+{
+	gnutls_bye(ws->dtls_session, GNUTLS_SHUT_WR);
+	gnutls_deinit(ws->dtls_session);
 }
 
 static size_t rehash(const void *_e, void *unused)

src/tlslib.h

@@ -25,6 +25,7 @@
 #include <gnutls/pkcs11.h>
 #include <vpn.h>
 #include <ccan/htable/htable.h>
+#include <errno.h>
 
 typedef struct 
 {
@@ -32,6 +33,7 @@ typedef struct
 	unsigned int entries;
 } tls_sess_db_st;
 
+#if 0
 #define tls_puts(s, str) tls_send(s, str, sizeof(str)-1)
 	
 int __attribute__ ((format(printf, 2, 3)))
@@ -47,6 +49,9 @@ ssize_t tls_send_nb(gnutls_session_t session, const void *data,
 void tls_cork(gnutls_session_t session);
 int tls_uncork(gnutls_session_t session);
 
+ssize_t tls_send_file(gnutls_session_t session, const char *file);
+#endif
+
 typedef struct tls_st {
 	gnutls_certificate_credentials_t xcred;
 	gnutls_priority_t cprio;
@@ -58,18 +63,8 @@ void tls_global_init(struct tls_st *creds);
 void tls_global_deinit(struct tls_st *creds);
 void tls_load_certs(struct main_server_st* s, struct tls_st *creds);
 
-ssize_t tls_send_file(gnutls_session_t session, const char *file);
 size_t tls_get_overhead(gnutls_protocol_t, gnutls_cipher_algorithm_t, gnutls_mac_algorithm_t);
 
-#define GNUTLS_FATAL_ERR(x) \
-        if (x < 0 && gnutls_error_is_fatal (x) != 0) { \
-                if (syslog_open) \
-                	syslog(LOG_ERR, "GnuTLS error (at %s:%d): %s", __FILE__, __LINE__, gnutls_strerror(x)); \
-                else \
-                        fprintf(stderr, "GnuTLS error (at %s:%d): %s\n", __FILE__, __LINE__, gnutls_strerror(x)); \
-                exit(1); \
-        }
-
 #define GNUTLS_FATAL_ERR_CMD(x, CMD) \
         if (x < 0 && gnutls_error_is_fatal (x) != 0) { \
                 if (syslog_open) \
@@ -79,6 +74,29 @@ size_t tls_get_overhead(gnutls_protocol_t, gnutls_cipher_algorithm_t, gnutls_mac
                 CMD; \
         }
 
+#define GNUTLS_FATAL_ERR(x) GNUTLS_FATAL_ERR_CMD(x, exit(1))
+
+#define FATAL_ERR_CMD(ws, x, CMD) \
+        if (ws->session != NULL) { \
+	        if (x < 0 && gnutls_error_is_fatal (x) != 0) { \
+        	        if (syslog_open) \
+                		syslog(LOG_ERR, "GnuTLS error (at %s:%d): %s", __FILE__, __LINE__, gnutls_strerror(x)); \
+	                else \
+        	                fprintf(stderr, "GnuTLS error (at %s:%d): %s\n", __FILE__, __LINE__, gnutls_strerror(x)); \
+	                CMD; \
+	        } \
+	} else { \
+	        if (x < 0 && errno != EINTR && errno != EAGAIN) { \
+        	        if (syslog_open) \
+                		syslog(LOG_ERR, "socket error (at %s:%d): %s", __FILE__, __LINE__, strerror(errno)); \
+	                else \
+        	                fprintf(stderr, "socket error (at %s:%d): %s\n", __FILE__, __LINE__, strerror(errno)); \
+	                CMD; \
+	        } \
+	}
+
+#define FATAL_ERR(ws, x) FATAL_ERR_CMD(ws, x, exit(1))
+
 #define GNUTLS_S_FATAL_ERR(session, x) \
         if (x < 0 && gnutls_error_is_fatal (x) != 0) { \
                 if (syslog_open) { \
@@ -120,4 +138,24 @@ void tls_cache_init(void *pool, tls_sess_db_st* db);
 void tls_cache_deinit(tls_sess_db_st* db);
 void *calc_sha1_hash(void *pool, char* file, unsigned cert);
 
+/* TLS API */
+int __attribute__ ((format(printf, 2, 3)))
+    cstp_printf(struct worker_st *ws, const char *fmt, ...);
+void cstp_close(struct worker_st *ws);
+void cstp_fatal_close(struct worker_st *ws,
+			    gnutls_alert_description_t a);
+ssize_t cstp_recv(struct worker_st *ws, void *data, size_t data_size);
+ssize_t cstp_recv_nb(struct worker_st *ws, void *data, size_t data_size);
+ssize_t cstp_send_file(struct worker_st *ws, const char *file);
+ssize_t cstp_send(struct worker_st *ws, const void *data,
+			size_t data_size);
+#define cstp_puts(s, str) cstp_send(s, str, sizeof(str)-1)
+
+void cstp_cork(struct worker_st *ws);
+int cstp_uncork(struct worker_st *ws);
+
+/* DTLS API */
+void dtls_close(struct worker_st *ws);
+ssize_t dtls_send(struct worker_st *ws, const void *data, size_t data_size);
+
 #endif

src/vpn.h

@@ -44,6 +44,12 @@
 # define _ATTR_PACKED
 #endif
 
+typedef enum {
+	SOCK_TYPE_TCP,
+	SOCK_TYPE_UDP,
+	SOCK_TYPE_UNIX
+} sock_type_t;
+
 #define DEBUG_BASIC 1
 #define DEBUG_HTTP  2
 #define DEBUG_TRANSFERRED 5
@@ -181,6 +187,8 @@ struct cfg_st {
 	char *name; /* server name */
 	unsigned int port;
 	unsigned int udp_port;
+	char* unix_conn_file;
+
 	char *pin_file;
 	char *srk_pin_file;
 	char **cert;

src/worker-auth.c

@@ -152,12 +152,12 @@ int get_auth_handler2(worker_st * ws, unsigned http_ver, const char *pmsg)
 
 	str_init(&str, ws);
 
-	tls_cork(ws->session);
-	ret = tls_printf(ws->session, "HTTP/1.%u 200 OK\r\n", http_ver);
+	cstp_cork(ws);
+	ret = cstp_printf(ws, "HTTP/1.%u 200 OK\r\n", http_ver);
 	if (ret < 0)
 		return -1;
 
-	ret = tls_puts(ws->session, "Connection: Keep-Alive\r\n");
+	ret = cstp_puts(ws, "Connection: Keep-Alive\r\n");
 	if (ret < 0)
 		return -1;
 
@@ -166,7 +166,7 @@ int get_auth_handler2(worker_st * ws, unsigned http_ver, const char *pmsg)
 			      sizeof(context));
 
 		ret =
-		    tls_printf(ws->session,
+		    cstp_printf(ws,
 			       "Set-Cookie: webvpncontext=%s; Max-Age=%u; Secure\r\n",
 			       context, (unsigned)MAX_AUTH_SECS);
 		if (ret < 0)
@@ -175,7 +175,7 @@ int get_auth_handler2(worker_st * ws, unsigned http_ver, const char *pmsg)
 		oclog(ws, LOG_DEBUG, "sent sid: %s", context);
 	}
 
-	ret = tls_puts(ws->session, "Content-Type: text/xml\r\n");
+	ret = cstp_puts(ws, "Content-Type: text/xml\r\n");
 	if (ret < 0) {
 		ret = -1;
 		goto cleanup;
@@ -315,33 +315,33 @@ int get_auth_handler2(worker_st * ws, unsigned http_ver, const char *pmsg)
 	}
 
 	ret =
-	    tls_printf(ws->session, "Content-Length: %u\r\n",
+	    cstp_printf(ws, "Content-Length: %u\r\n",
 		       (unsigned int)str.length);
 	if (ret < 0) {
 		ret = -1;
 		goto cleanup;
 	}
 
-	ret = tls_puts(ws->session, "X-Transcend-Version: 1\r\n");
+	ret = cstp_puts(ws, "X-Transcend-Version: 1\r\n");
 	if (ret < 0) {
 		ret = -1;
 		goto cleanup;
 	}
 
-	ret = tls_puts(ws->session, "\r\n");
+	ret = cstp_puts(ws, "\r\n");
 	if (ret < 0) {
 		ret = -1;
 		goto cleanup;
 	}
 
-	ret = tls_send(ws->session, str.data, str.length);
+	ret = cstp_send(ws, str.data, str.length);
 	if (ret < 0) {
 		ret = -1;
 		goto cleanup;
 	}
 
 
-	ret = tls_uncork(ws->session);
+	ret = cstp_uncork(ws);
 	if (ret < 0) {
 		ret = -1;
 		goto cleanup;
@@ -869,17 +869,17 @@ int post_common_handler(worker_st * ws, unsigned http_ver)
 		      (char *)str_cookie, str_cookie_size);
 
 	/* reply */
-	tls_cork(ws->session);
+	cstp_cork(ws);
 
-	ret = tls_printf(ws->session, "HTTP/1.%u 200 OK\r\n", http_ver);
+	ret = cstp_printf(ws, "HTTP/1.%u 200 OK\r\n", http_ver);
 	if (ret < 0)
 		return -1;
 
-	ret = tls_puts(ws->session, "Connection: Keep-Alive\r\n");
+	ret = cstp_puts(ws, "Connection: Keep-Alive\r\n");
 	if (ret < 0)
 		return -1;
 
-	ret = tls_puts(ws->session, "Content-Type: text/xml\r\n");
+	ret = cstp_puts(ws, "Content-Type: text/xml\r\n");
 	if (ret < 0)
 		return -1;
 
@@ -898,16 +898,16 @@ int post_common_handler(worker_st * ws, unsigned http_ver)
 
 	size += success_msg_head_size + success_msg_foot_size;
 
-	ret = tls_printf(ws->session, "Content-Length: %u\r\n", (unsigned)size);
+	ret = cstp_printf(ws, "Content-Length: %u\r\n", (unsigned)size);
 	if (ret < 0)
 		return -1;
 
-	ret = tls_puts(ws->session, "X-Transcend-Version: 1\r\n");
+	ret = cstp_puts(ws, "X-Transcend-Version: 1\r\n");
 	if (ret < 0)
 		return -1;
 
 	ret =
-	    tls_printf(ws->session,
+	    cstp_printf(ws,
 		       "Set-Cookie: webvpn=%s; Secure\r\n",
 		       str_cookie);
 	if (ret < 0)
@@ -915,21 +915,21 @@ int post_common_handler(worker_st * ws, unsigned http_ver)
 
 #ifdef ANYCONNECT_CLIENT_COMPAT
 	ret =
-	    tls_puts(ws->session,
+	    cstp_puts(ws,
 		     "Set-Cookie: webvpnc=; expires=Thu, 01 Jan 1970 22:00:00 GMT; path=/; Secure\r\n");
 	if (ret < 0)
 		return -1;
 
 	if (ws->config->xml_config_file) {
 		ret =
-		    tls_printf(ws->session,
+		    cstp_printf(ws,
 			       "Set-Cookie: webvpnc=bu:/&p:t&iu:1/&sh:%s&lu:/+CSCOT+/translation-table?textdomain%%3DAnyConnect%%26type%%3Dmanifest&fu:profiles%%2F%s&fh:%s; path=/; Secure\r\n",
 			       ws->config->cert_hash,
 			       ws->config->xml_config_file,
 			       ws->config->xml_config_hash);
 	} else {
 		ret =
-		    tls_printf(ws->session,
+		    cstp_printf(ws,
 			       "Set-Cookie: webvpnc=bu:/&p:t&iu:1/&sh:%s; path=/; Secure\r\n",
 			       ws->config->cert_hash);
 	}
@@ -939,12 +939,12 @@ int post_common_handler(worker_st * ws, unsigned http_ver)
 #endif
 
 	ret =
-	    tls_printf(ws->session,
+	    cstp_printf(ws,
 		       "\r\n%s%s%s", success_msg_head, msg, success_msg_foot);
 	if (ret < 0)
 		return -1;
 
-	ret = tls_uncork(ws->session);
+	ret = cstp_uncork(ws);
 	if (ret < 0)
 		return -1;
 
@@ -1262,9 +1262,9 @@ int post_auth_handler(worker_st * ws, unsigned http_ver)
 
 	if (sd != -1)
 		close(sd);
-	tls_printf(ws->session,
+	cstp_printf(ws,
 		   "HTTP/1.1 401 Unauthorized\r\nX-Reason: %s\r\n\r\n",
 		   reason);
-	tls_fatal_close(ws->session, GNUTLS_A_ACCESS_DENIED);
+	cstp_fatal_close(ws, GNUTLS_A_ACCESS_DENIED);
 	exit(1);
 }

src/worker-extras.c

@@ -49,47 +49,47 @@ struct stat st;
 	oclog(ws, LOG_HTTP_DEBUG, "requested config: %s", ws->req.url); 
 	if (ws->config->xml_config_file == NULL) {
 		oclog(ws, LOG_INFO, "requested config but no config file is set");
-		tls_printf(ws->session, "HTTP/1.%u 404 Not found\r\n", http_ver);
+		cstp_printf(ws, "HTTP/1.%u 404 Not found\r\n", http_ver);
 		return -1;
 	}
 	
 	ret = stat( ws->config->xml_config_file, &st);
 	if (ret == -1) {
 		oclog(ws, LOG_INFO, "cannot load config file '%s'", ws->config->xml_config_file);
-		tls_printf(ws->session, "HTTP/1.%u 404 Not found\r\n", http_ver);
+		cstp_printf(ws, "HTTP/1.%u 404 Not found\r\n", http_ver);
 		return -1;
 	}
 
-	tls_cork(ws->session);
-	ret = tls_printf(ws->session, "HTTP/1.%u 200 OK\r\n", http_ver);
+	cstp_cork(ws);
+	ret = cstp_printf(ws, "HTTP/1.%u 200 OK\r\n", http_ver);
 	if (ret < 0)
 		return -1;
 
-	ret = tls_puts(ws->session, "Connection: Keep-Alive\r\n");
+	ret = cstp_puts(ws, "Connection: Keep-Alive\r\n");
 	if (ret < 0)
 		return -1;
 
-	ret = tls_puts(ws->session, "Content-Type: text/xml\r\n");
+	ret = cstp_puts(ws, "Content-Type: text/xml\r\n");
 	if (ret < 0)
 		return -1;
 
-	ret = tls_puts(ws->session, "X-Transcend-Version: 1\r\n");
+	ret = cstp_puts(ws, "X-Transcend-Version: 1\r\n");
 	if (ret < 0)
 		return -1;
 
-	ret = tls_printf(ws->session, "Content-Length: %u\r\n", (unsigned)st.st_size);
+	ret = cstp_printf(ws, "Content-Length: %u\r\n", (unsigned)st.st_size);
 	if (ret < 0)
 		return -1;
 
-	ret = tls_puts(ws->session, "\r\n");
+	ret = cstp_puts(ws, "\r\n");
 	if (ret < 0)
 		return -1;
 
-	ret = tls_uncork(ws->session);
+	ret = cstp_uncork(ws);
 	if (ret < 0)
 		return -1;
 	
-	ret = tls_send_file(ws->session, ws->config->xml_config_file);
+	ret = cstp_send_file(ws, ws->config->xml_config_file);
 	if (ret < 0) {
 		oclog(ws, LOG_ERR, "error sending file '%s': %s", ws->config->xml_config_file, gnutls_strerror(ret));
 		return -1;
@@ -116,32 +116,32 @@ int len;
 		len = sizeof(XML_START)-1;
 	}
 
-	tls_cork(ws->session);
-	ret = tls_printf(ws->session, "HTTP/1.%u 200 OK\r\n", http_ver);
+	cstp_cork(ws);
+	ret = cstp_printf(ws, "HTTP/1.%u 200 OK\r\n", http_ver);
 	if (ret < 0)
 		return -1;
 
-	ret = tls_puts(ws->session, "Connection: Keep-Alive\r\n");
+	ret = cstp_puts(ws, "Connection: Keep-Alive\r\n");
 	if (ret < 0)
 		return -1;
 
-	ret = tls_puts(ws->session, "Content-Type: text/xml\r\n");
+	ret = cstp_puts(ws, "Content-Type: text/xml\r\n");
 	if (ret < 0)
 		return -1;
 
-	ret = tls_puts(ws->session, "X-Transcend-Version: 1\r\n");
+	ret = cstp_puts(ws, "X-Transcend-Version: 1\r\n");
 	if (ret < 0)
 		return -1;
 
-	ret = tls_printf(ws->session, "Content-Length: %d\r\n\r\n", len);
+	ret = cstp_printf(ws, "Content-Length: %d\r\n\r\n", len);
 	if (ret < 0)
 		return -1;
 		
-	ret = tls_send(ws->session, data, len);
+	ret = cstp_send(ws, data, len);
 	if (ret < 0)
 		return -1;
 
-	ret = tls_uncork(ws->session);
+	ret = cstp_uncork(ws);
 	if (ret < 0)
 		return -1;
 	
@@ -162,32 +162,32 @@ int len;
 	data = SH_SCRIPT;
 	len = sizeof(SH_SCRIPT)-1;
 
-	tls_cork(ws->session);
-	ret = tls_printf(ws->session, "HTTP/1.%u 200 OK\r\n", http_ver);
+	cstp_cork(ws);
+	ret = cstp_printf(ws, "HTTP/1.%u 200 OK\r\n", http_ver);
 	if (ret < 0)
 		return -1;
 
-	ret = tls_puts(ws->session, "Connection: Keep-Alive\r\n");
+	ret = cstp_puts(ws, "Connection: Keep-Alive\r\n");
 	if (ret < 0)
 		return -1;
 
-	ret = tls_puts(ws->session, "Content-Type: application/x-shellscript\r\n");
+	ret = cstp_puts(ws, "Content-Type: application/x-shellscript\r\n");
 	if (ret < 0)
 		return -1;
 
-	ret = tls_puts(ws->session, "X-Transcend-Version: 1\r\n");
+	ret = cstp_puts(ws, "X-Transcend-Version: 1\r\n");
 	if (ret < 0)
 		return -1;
 
-	ret = tls_printf(ws->session, "Content-Length: %d\r\n\r\n", len);
+	ret = cstp_printf(ws, "Content-Length: %d\r\n\r\n", len);
 	if (ret < 0)
 		return -1;
 		
-	ret = tls_send(ws->session, data, len);
+	ret = cstp_send(ws, data, len);
 	if (ret < 0)
 		return -1;
 
-	ret = tls_uncork(ws->session);
+	ret = cstp_uncork(ws);
 	if (ret < 0)
 		return -1;
 	
@@ -198,36 +198,36 @@ int get_empty_handler(worker_st *ws, unsigned http_ver)
 {
 int ret;
 
-	tls_cork(ws->session);
-	ret = tls_printf(ws->session, "HTTP/1.%u 200 OK\r\n", http_ver);
+	cstp_cork(ws);
+	ret = cstp_printf(ws, "HTTP/1.%u 200 OK\r\n", http_ver);
 	if (ret < 0)
 		return -1;
 
-	ret = tls_puts(ws->session, "Connection: Keep-Alive\r\n");
+	ret = cstp_puts(ws, "Connection: Keep-Alive\r\n");
 	if (ret < 0)
 		return -1;
 
-	ret = tls_puts(ws->session, "Content-Type: text/html\r\n");
+	ret = cstp_puts(ws, "Content-Type: text/html\r\n");
 	if (ret < 0)
 		return -1;
 
-	ret = tls_printf(ws->session, "Content-Length: %u\r\n", (unsigned int)sizeof(empty_msg)-1);
+	ret = cstp_printf(ws, "Content-Length: %u\r\n", (unsigned int)sizeof(empty_msg)-1);
 	if (ret < 0)
 		return -1;
 
-	ret = tls_puts(ws->session, "X-Transcend-Version: 1\r\n");
+	ret = cstp_puts(ws, "X-Transcend-Version: 1\r\n");
 	if (ret < 0)
 		return -1;
 
-	ret = tls_puts(ws->session, "\r\n");
+	ret = cstp_puts(ws, "\r\n");
 	if (ret < 0)
 		return -1;
 
-	ret = tls_send(ws->session, empty_msg, sizeof(empty_msg)-1);
+	ret = cstp_send(ws, empty_msg, sizeof(empty_msg)-1);
 	if (ret < 0)
 		return -1;
 	
-	ret = tls_uncork(ws->session);
+	ret = cstp_uncork(ws);
 	if (ret < 0)
 		return -1;
 	

src/worker-vpn.c

@@ -674,7 +674,7 @@ void vpn_server(struct worker_st *ws)
 	unsigned char buf[2048];
 	int ret;
 	ssize_t nparsed, nrecvd;
-	gnutls_session_t session;
+	gnutls_session_t session = NULL;
 	http_parser parser;
 	http_parser_settings settings;
 	url_handler_fn fn;
@@ -705,33 +705,38 @@ void vpn_server(struct worker_st *ws)
 	else
 		ws->proto = AF_INET6;
 
-	/* initialize the session */
-	ret = gnutls_init(&session, GNUTLS_SERVER);
-	GNUTLS_FATAL_ERR(ret);
+	if (ws->conn_type != SOCK_TYPE_UNIX) {
+		/* initialize the session */
+		ret = gnutls_init(&session, GNUTLS_SERVER);
+		GNUTLS_FATAL_ERR(ret);
 
-	ret = gnutls_priority_set(session, ws->creds->cprio);
-	GNUTLS_FATAL_ERR(ret);
+		ret = gnutls_priority_set(session, ws->creds->cprio);
+		GNUTLS_FATAL_ERR(ret);
 
-	ret =
-	    gnutls_credentials_set(session, GNUTLS_CRD_CERTIFICATE,
-				   ws->creds->xcred);
-	GNUTLS_FATAL_ERR(ret);
+		ret =
+		    gnutls_credentials_set(session, GNUTLS_CRD_CERTIFICATE,
+					   ws->creds->xcred);
+		GNUTLS_FATAL_ERR(ret);
 
-	gnutls_certificate_server_set_request(session, ws->config->cert_req);
-	gnutls_transport_set_ptr(session,
+		gnutls_certificate_server_set_request(session, ws->config->cert_req);
+
+		gnutls_transport_set_ptr(session,
 				 (gnutls_transport_ptr_t) (long)ws->conn_fd);
-	set_resume_db_funcs(session);
-	gnutls_session_set_ptr(session, ws);
-	gnutls_db_set_ptr(session, ws);
-	gnutls_db_set_cache_expiration(session, TLS_SESSION_EXPIRATION_TIME(ws->config));
+		set_resume_db_funcs(session);
+		gnutls_session_set_ptr(session, ws);
+		gnutls_db_set_ptr(session, ws);
+		gnutls_db_set_cache_expiration(session, TLS_SESSION_EXPIRATION_TIME(ws->config));
 
-	gnutls_handshake_set_timeout(session, GNUTLS_DEFAULT_HANDSHAKE_TIMEOUT);
-	do {
-		ret = gnutls_handshake(session);
-	} while (ret < 0 && gnutls_error_is_fatal(ret) == 0);
-	GNUTLS_S_FATAL_ERR(session, ret);
+		gnutls_handshake_set_timeout(session, GNUTLS_DEFAULT_HANDSHAKE_TIMEOUT);
+		do {
+			ret = gnutls_handshake(session);
+		} while (ret < 0 && gnutls_error_is_fatal(ret) == 0);
+		GNUTLS_S_FATAL_ERR(session, ret);
 
-	oclog(ws, LOG_DEBUG, "TLS handshake completed");
+		oclog(ws, LOG_DEBUG, "TLS handshake completed");
+	} else {
+		oclog(ws, LOG_DEBUG, "Accepted unix connection");
+	}
 
 	memset(&settings, 0, sizeof(settings));
 
@@ -757,7 +762,7 @@ void vpn_server(struct worker_st *ws)
 	http_req_reset(ws);
 	/* parse as we go */
 	do {
-		nrecvd = tls_recv(session, buf, sizeof(buf));
+		nrecvd = cstp_recv_nb(ws, buf, sizeof(buf));
 		if (nrecvd <= 0) {
 			if (nrecvd == 0)
 				goto finish;
@@ -781,7 +786,7 @@ void vpn_server(struct worker_st *ws)
 		fn = get_url_handler(ws->req.url);
 		if (fn == NULL) {
 			oclog(ws, LOG_HTTP_DEBUG, "unexpected URL %s", ws->req.url);
-			tls_puts(session, "HTTP/1.1 404 Not found\r\n\r\n");
+			cstp_puts(ws, "HTTP/1.1 404 Not found\r\n\r\n");
 			goto finish;
 		}
 		ret = fn(ws, parser.http_minor);
@@ -793,8 +798,8 @@ void vpn_server(struct worker_st *ws)
 		/* continue reading */
 		oclog(ws, LOG_HTTP_DEBUG, "HTTP POST %s", ws->req.url);
 		while (ws->req.message_complete == 0) {
-			nrecvd = tls_recv(session, buf, sizeof(buf));
-			GNUTLS_FATAL_ERR(nrecvd);
+			nrecvd = cstp_recv_nb(ws, buf, sizeof(buf));
+			FATAL_ERR(ws, nrecvd);
 
 			nparsed =
 			    http_parser_execute(&parser, &settings, (void *)buf,
@@ -810,7 +815,7 @@ void vpn_server(struct worker_st *ws)
 		if (fn == NULL) {
 			oclog(ws, LOG_HTTP_DEBUG, "unexpected POST URL %s",
 			      ws->req.url);
-			tls_puts(session, "HTTP/1.1 404 Not found\r\n\r\n");
+			cstp_puts(ws, "HTTP/1.1 404 Not found\r\n\r\n");
 			goto finish;
 		}
 
@@ -829,12 +834,12 @@ void vpn_server(struct worker_st *ws)
 	} else {
 		oclog(ws, LOG_HTTP_DEBUG, "unexpected HTTP method %s",
 		      http_method_str(parser.method));
-		tls_printf(session, "HTTP/1.%u 404 Nah, go away\r\n\r\n",
+		cstp_printf(ws, "HTTP/1.%u 404 Nah, go away\r\n\r\n",
 			   parser.http_minor);
 	}
 
  finish:
-	tls_close(session);
+	cstp_close(ws);
 }
 
 static
@@ -907,7 +912,7 @@ int mtu_not_ok(worker_st * ws)
 	if (ws->last_good_mtu == min) {
 		oclog(ws, LOG_INFO,
 		      "could not calculate a sufficient MTU. Disabling DTLS.");
-		tls_close(ws->dtls_session);
+		dtls_close(ws);
 		ws->udp_state = UP_DISABLED;
 		return -1;
 	}
@@ -979,7 +984,7 @@ int periodic_check(worker_st * ws, unsigned mtu_overhead, time_t now,
 		      (int)(now - ws->last_msg_udp), dpd);
 
 		ws->buffer[0] = AC_PKT_DPD_OUT;
-		ret = tls_send(ws->dtls_session, ws->buffer, 1);
+		ret = dtls_send(ws, ws->buffer, 1);
 		GNUTLS_FATAL_ERR_CMD(ret, exit_worker(ws));
 
 		if (now - ws->last_msg_udp > DPD_MAX_TRIES * dpd) {
@@ -1001,8 +1006,8 @@ int periodic_check(worker_st * ws, unsigned mtu_overhead, time_t now,
 		ws->buffer[6] = AC_PKT_DPD_OUT;
 		ws->buffer[7] = 0;
 
-		ret = tls_send(ws->session, ws->buffer, 8);
-		GNUTLS_FATAL_ERR_CMD(ret, exit_worker(ws));
+		ret = cstp_send(ws, ws->buffer, 8);
+		FATAL_ERR_CMD(ws, ret, exit_worker(ws));
 
 		if (now - ws->last_msg_tcp > DPD_MAX_TRIES * dpd) {
 			oclog(ws, LOG_ERR,
@@ -1085,7 +1090,7 @@ static int dtls_mainloop(worker_st * ws, struct timespec *tnow)
 		}
 #endif
 		ret =
-		    tls_recv_nb(ws->dtls_session, ws->buffer, ws->buffer_size);
+		    gnutls_record_recv(ws->dtls_session, ws->buffer, ws->buffer_size);
 		oclog(ws, LOG_TRANSFER_DEBUG,
 		      "received %d byte(s) (DTLS)", ret);
 
@@ -1202,8 +1207,8 @@ static int tls_mainloop(struct worker_st *ws, struct timespec *tnow)
 {
 	int ret, l;
 
-	ret = tls_recv_nb(ws->session, ws->buffer, ws->buffer_size);
-	GNUTLS_FATAL_ERR_CMD(ret, exit_worker(ws));
+	ret = cstp_recv_nb(ws, ws->buffer, ws->buffer_size);
+	FATAL_ERR_CMD(ws, ret, exit_worker(ws));
 
 	if (ret == 0) {		/* disconnect */
 		oclog(ws, LOG_DEBUG, "client disconnected");
@@ -1285,7 +1290,7 @@ static int tun_mainloop(struct worker_st *ws, struct timespec *tnow)
 
 			ws->buffer[7] = AC_PKT_DATA;
 
-			ret = tls_send(ws->dtls_session, ws->buffer + 7, l + 1);
+			ret = dtls_send(ws, ws->buffer + 7, l + 1);
 			GNUTLS_FATAL_ERR_CMD(ret, exit_worker(ws));
 
 			if (ret == GNUTLS_E_LARGE_PACKET) {
@@ -1310,8 +1315,8 @@ static int tun_mainloop(struct worker_st *ws, struct timespec *tnow)
 			ws->buffer[6] = AC_PKT_DATA;
 			ws->buffer[7] = 0;
 
-			ret = tls_send(ws->session, ws->buffer, l + 8);
-			GNUTLS_FATAL_ERR_CMD(ret, exit_worker(ws));
+			ret = cstp_send(ws, ws->buffer, l + 8);
+			FATAL_ERR_CMD(ws, ret, exit_worker(ws));
 		}
 		ws->last_nc_msg = tnow->tv_sec;
 	}
@@ -1384,9 +1389,9 @@ static int connect_handler(worker_st * ws)
 	/* we must be in S_AUTH_COOKIE state */
 	if (ws->auth_state != S_AUTH_COOKIE || ws->cookie_set == 0) {
 		oclog(ws, LOG_WARNING, "no cookie found");
-		tls_puts(ws->session,
+		cstp_puts(ws,
 			 "HTTP/1.1 503 Service Unavailable\r\n\r\n");
-		tls_fatal_close(ws->session, GNUTLS_A_ACCESS_DENIED);
+		cstp_fatal_close(ws, GNUTLS_A_ACCESS_DENIED);
 		exit_worker(ws);
 	}
 
@@ -1396,31 +1401,31 @@ static int connect_handler(worker_st * ws)
 	if (ret < 0) {
 		oclog(ws, LOG_WARNING, "failed cookie authentication attempt");
 		if (ret == ERR_AUTH_FAIL) {
-			tls_puts(ws->session,
+			cstp_puts(ws,
 				 "HTTP/1.1 401 Unauthorized\r\n\r\n");
-			tls_puts(ws->session,
+			cstp_puts(ws,
 				 "X-Reason: Cookie is not acceptable\r\n\r\n");
 		} else {
-			tls_puts(ws->session,
+			cstp_puts(ws,
 				 "HTTP/1.1 503 Service Unavailable\r\n\r\n");
 		}
-		tls_fatal_close(ws->session, GNUTLS_A_ACCESS_DENIED);
+		cstp_fatal_close(ws, GNUTLS_A_ACCESS_DENIED);
 		exit_worker(ws);
 	}
 	ws->auth_state = S_AUTH_COMPLETE;
 
 	if (strcmp(req->url, "/CSCOSSLC/tunnel") != 0) {
 		oclog(ws, LOG_INFO, "bad connect request: '%s'\n", req->url);
-		tls_puts(ws->session, "HTTP/1.1 404 Nah, go away\r\n\r\n");
-		tls_fatal_close(ws->session, GNUTLS_A_ACCESS_DENIED);
+		cstp_puts(ws, "HTTP/1.1 404 Nah, go away\r\n\r\n");
+		cstp_fatal_close(ws, GNUTLS_A_ACCESS_DENIED);
 		exit_worker(ws);
 	}
 
 	if (ws->config->network.name[0] == 0) {
 		oclog(ws, LOG_ERR,
 		      "no networks are configured; rejecting client");
-		tls_puts(ws->session, "HTTP/1.1 503 Service Unavailable\r\n");
-		tls_puts(ws->session,
+		cstp_puts(ws, "HTTP/1.1 503 Service Unavailable\r\n");
+		cstp_puts(ws,
 			 "X-Reason: Server configuration error\r\n\r\n");
 		return -1;
 	}
@@ -1429,8 +1434,8 @@ static int connect_handler(worker_st * ws)
 	if (ret < 0) {
 		oclog(ws, LOG_ERR,
 		      "no networks are configured; rejecting client");
-		tls_puts(ws->session, "HTTP/1.1 503 Service Unavailable\r\n");
-		tls_puts(ws->session,
+		cstp_puts(ws, "HTTP/1.1 503 Service Unavailable\r\n");
+		cstp_puts(ws,
 			 "X-Reason: Server configuration error\r\n\r\n");
 		return -1;
 	}
@@ -1440,14 +1445,14 @@ static int connect_handler(worker_st * ws)
 		alarm(0);
 	http_req_deinit(ws);
 
-	tls_cork(ws->session);
-	ret = tls_puts(ws->session, "HTTP/1.1 200 CONNECTED\r\n");
+	cstp_cork(ws);
+	ret = cstp_puts(ws, "HTTP/1.1 200 CONNECTED\r\n");
 	SEND_ERR(ret);
 
-	ret = tls_puts(ws->session, "X-CSTP-Version: 1\r\n");
+	ret = cstp_puts(ws, "X-CSTP-Version: 1\r\n");
 	SEND_ERR(ret);
 
-	ret = tls_puts(ws->session, "X-Server-Version: "PACKAGE_STRING"\r\n");
+	ret = cstp_puts(ws, "X-Server-Version: "PACKAGE_STRING"\r\n");
 	SEND_ERR(ret);
 
 	if (req->is_mobile) {
@@ -1458,14 +1463,14 @@ static int connect_handler(worker_st * ws)
 	oclog(ws, LOG_DEBUG, "suggesting DPD of %d secs", ws->config->dpd);
 	if (ws->config->dpd > 0) {
 		ret =
-		    tls_printf(ws->session, "X-CSTP-DPD: %u\r\n",
+		    cstp_printf(ws, "X-CSTP-DPD: %u\r\n",
 			       ws->config->dpd);
 		SEND_ERR(ret);
 	}
 
 	if (ws->config->default_domain) {
 		ret =
-		    tls_printf(ws->session, "X-CSTP-Default-Domain: %s\r\n",
+		    cstp_printf(ws, "X-CSTP-Default-Domain: %s\r\n",
 			       ws->config->default_domain);
 		SEND_ERR(ret);
 	}
@@ -1481,13 +1486,13 @@ static int connect_handler(worker_st * ws)
 	if (ws->vinfo.ipv4 && req->no_ipv4 == 0) {
 		oclog(ws, LOG_DEBUG, "sending IPv4 %s", ws->vinfo.ipv4);
 		ret =
-		    tls_printf(ws->session, "X-CSTP-Address: %s\r\n",
+		    cstp_printf(ws, "X-CSTP-Address: %s\r\n",
 			       ws->vinfo.ipv4);
 		SEND_ERR(ret);
 
 		if (ws->vinfo.ipv4_netmask) {
 			ret =
-			    tls_printf(ws->session, "X-CSTP-Netmask: %s\r\n",
+			    cstp_printf(ws, "X-CSTP-Netmask: %s\r\n",
 				       ws->vinfo.ipv4_netmask);
 			SEND_ERR(ret);
 		}
@@ -1505,20 +1510,20 @@ static int connect_handler(worker_st * ws)
 		oclog(ws, LOG_DEBUG, "sending IPv6 %s", ws->vinfo.ipv6);
 		if (ws->full_ipv6 && ws->vinfo.ipv6_prefix) {
 			ret =
-			    tls_printf(ws->session,
+			    cstp_printf(ws,
 				       "X-CSTP-Address-IP6: %s/%u\r\n",
 				       ws->vinfo.ipv6, ws->vinfo.ipv6_prefix);
 			SEND_ERR(ret);
 		} else {
 			ret =
-			    tls_printf(ws->session, "X-CSTP-Address: %s\r\n",
+			    cstp_printf(ws, "X-CSTP-Address: %s\r\n",
 				       ws->vinfo.ipv6);
 			SEND_ERR(ret);
 		}
 
 		if (ws->vinfo.ipv6_network && ws->vinfo.ipv6_prefix != 0) {
 			ret =
-			    tls_printf(ws->session,
+			    cstp_printf(ws,
 				       "X-CSTP-Netmask: %s/%u\r\n",
 					       ws->vinfo.ipv6_network, ws->vinfo.ipv6_prefix);
 			SEND_ERR(ret);
@@ -1532,7 +1537,7 @@ static int connect_handler(worker_st * ws)
 			continue;
 
 		ret =
-		    tls_printf(ws->session, "X-CSTP-DNS: %s\r\n",
+		    cstp_printf(ws, "X-CSTP-DNS: %s\r\n",
 			       ws->vinfo.dns[i]);
 		SEND_ERR(ret);
 	}
@@ -1544,7 +1549,7 @@ static int connect_handler(worker_st * ws)
 			continue;
 
 		ret =
-		    tls_printf(ws->session, "X-CSTP-NBNS: %s\r\n",
+		    cstp_printf(ws, "X-CSTP-NBNS: %s\r\n",
 			       ws->vinfo.nbns[i]);
 		SEND_ERR(ret);
 	}
@@ -1553,7 +1558,7 @@ static int connect_handler(worker_st * ws)
 		oclog(ws, LOG_DEBUG, "adding split DNS %s",
 		      ws->config->split_dns[i]);
 		ret =
-		    tls_printf(ws->session, "X-CSTP-Split-DNS: %s\r\n",
+		    cstp_printf(ws, "X-CSTP-Split-DNS: %s\r\n",
 			       ws->config->split_dns[i]);
 		SEND_ERR(ret);
 	}
@@ -1572,11 +1577,11 @@ static int connect_handler(worker_st * ws)
 			oclog(ws, LOG_DEBUG, "adding route %s", ws->vinfo.routes[i]);
 
 			if (ip6 != 0 && ws->full_ipv6) {
-				ret = tls_printf(ws->session,
+				ret = cstp_printf(ws,
 					 "X-CSTP-Split-Include-IP6: %s\r\n",
 					 ws->vinfo.routes[i]);
 			} else {
-				ret = tls_printf(ws->session,
+				ret = cstp_printf(ws,
 					 "X-CSTP-Split-Include: %s\r\n",
 					 ws->vinfo.routes[i]);
 			}
@@ -1596,11 +1601,11 @@ static int connect_handler(worker_st * ws)
 			oclog(ws, LOG_DEBUG, "adding private route %s", ws->routes[i]);
 
 			if (ip6 != 0 && ws->full_ipv6) {
-				ret = tls_printf(ws->session,
+				ret = cstp_printf(ws,
 					 "X-CSTP-Split-Include-IP6: %s\r\n",
 					 ws->routes[i]);
 			} else {
-				ret = tls_printf(ws->session,
+				ret = cstp_printf(ws,
 					 "X-CSTP-Split-Include: %s\r\n",
 					 ws->routes[i]);
 			}
@@ -1609,22 +1614,22 @@ static int connect_handler(worker_st * ws)
 	}
 
 	ret =
-	    tls_printf(ws->session, "X-CSTP-Keepalive: %u\r\n",
+	    cstp_printf(ws, "X-CSTP-Keepalive: %u\r\n",
 		       ws->config->keepalive);
 	SEND_ERR(ret);
 
 	if (ws->config->idle_timeout > 0) {
 		ret =
-		    tls_printf(ws->session,
+		    cstp_printf(ws,
 			       "X-CSTP-Idle-Timeout: %u\r\n",
 			       (unsigned)ws->config->idle_timeout);
 	} else {
-		ret = tls_puts(ws->session, "X-CSTP-Idle-Timeout: none\r\n");
+		ret = cstp_puts(ws, "X-CSTP-Idle-Timeout: none\r\n");
 	}
 	SEND_ERR(ret);
 
 	ret =
-	    tls_puts(ws->session,
+	    cstp_puts(ws,
 		     "X-CSTP-Smartcard-Removal-Disconnect: true\r\n");
 	SEND_ERR(ret);
 
@@ -1632,23 +1637,23 @@ static int connect_handler(worker_st * ws)
 		unsigned method;
 
 		ret =
-		    tls_printf(ws->session, "X-CSTP-Rekey-Time: %u\r\n",
+		    cstp_printf(ws, "X-CSTP-Rekey-Time: %u\r\n",
 			       (unsigned)(ws->config->rekey_time));
 		SEND_ERR(ret);
 
 		/* if the peer isn't patched for safe renegotiation, always
 		 * require him to open a new tunnel. */
-		if (gnutls_safe_renegotiation_status(ws->session) != 0)
+		if (ws->session != NULL && gnutls_safe_renegotiation_status(ws->session) != 0)
 			method = ws->config->rekey_method;
 		else
 			method = REKEY_METHOD_NEW_TUNNEL;
 
-		ret = tls_printf(ws->session, "X-CSTP-Rekey-Method: %s\r\n",
+		ret = cstp_printf(ws, "X-CSTP-Rekey-Method: %s\r\n",
 				 (method ==
 				  REKEY_METHOD_SSL) ? "ssl" : "new-tunnel");
 		SEND_ERR(ret);
 	} else {
-		ret = tls_puts(ws->session, "X-CSTP-Rekey-Method: none\r\n");
+		ret = cstp_puts(ws, "X-CSTP-Rekey-Method: none\r\n");
 		SEND_ERR(ret);
 	}
 
@@ -1656,14 +1661,14 @@ static int connect_handler(worker_st * ws)
 		char *url = replace_vals(ws, ws->config->proxy_url);
 		if (url != NULL) {
 			ret =
-			    tls_printf(ws->session, "X-CSTP-MSIE-Proxy-Pac-URL: %s\r\n",
+			    cstp_printf(ws, "X-CSTP-MSIE-Proxy-Pac-URL: %s\r\n",
 			       url);
 			SEND_ERR(ret);
 			talloc_free(url);
 		}
 	}
 
-	ret = tls_puts(ws->session, "X-CSTP-Session-Timeout: none\r\n"
+	ret = cstp_puts(ws, "X-CSTP-Session-Timeout: none\r\n"
 		       "X-CSTP-Disconnected-Timeout: none\r\n"
 		       "X-CSTP-Keep: true\r\n"
 		       "X-CSTP-TCP-Keepalive: true\r\n"
@@ -1677,7 +1682,7 @@ static int connect_handler(worker_st * ws)
 		if (h) {
 			oclog(ws, LOG_DEBUG, "adding custom header '%s'", h);
 			ret =
-			    tls_printf(ws->session, "%s\r\n", h);
+			    cstp_printf(ws, "%s\r\n", h);
 			SEND_ERR(ret);
 			talloc_free(h);
 		}
@@ -1709,15 +1714,21 @@ static int connect_handler(worker_st * ws)
 		}
 	}
 
-	ret = tls_printf(ws->session, "X-CSTP-Base-MTU: %u\r\n", ws->vinfo.mtu);
+	ret = cstp_printf(ws, "X-CSTP-Base-MTU: %u\r\n", ws->vinfo.mtu);
 	SEND_ERR(ret);
 	oclog(ws, LOG_DEBUG, "CSTP Base MTU is %u bytes", ws->vinfo.mtu);
 
 	/* calculate TLS channel MTU */
-	ws->crypto_overhead = CSTP_OVERHEAD +
-	    tls_get_overhead(gnutls_protocol_get_version(ws->session),
-			     gnutls_cipher_get(ws->session),
-			     gnutls_mac_get(ws->session));
+	if (ws->session == NULL) {
+		/* wild guess */
+		ws->crypto_overhead = CSTP_OVERHEAD +
+			tls_get_overhead(GNUTLS_TLS1_0, GNUTLS_CIPHER_AES_128_CBC, GNUTLS_MAC_SHA1);
+	} else {
+		ws->crypto_overhead = CSTP_OVERHEAD +
+		    tls_get_overhead(gnutls_protocol_get_version(ws->session),
+				     gnutls_cipher_get(ws->session),
+				     gnutls_mac_get(ws->session));
+	}
 
 	/* plaintext MTU is the device MTU minus the overhead
 	 * of the CSTP protocol. */
@@ -1744,46 +1755,46 @@ static int connect_handler(worker_st * ws)
 			p += 2;
 		}
 		ret =
-		    tls_printf(ws->session, "X-DTLS-Session-ID: %s\r\n",
+		    cstp_printf(ws, "X-DTLS-Session-ID: %s\r\n",
 			       ws->buffer);
 		SEND_ERR(ret);
 
 		if (ws->config->dpd > 0) {
 			ret =
-			    tls_printf(ws->session, "X-DTLS-DPD: %u\r\n",
+			    cstp_printf(ws, "X-DTLS-DPD: %u\r\n",
 				       ws->config->dpd);
 			SEND_ERR(ret);
 		}
 
 		ret =
-		    tls_printf(ws->session, "X-DTLS-Port: %u\r\n",
+		    cstp_printf(ws, "X-DTLS-Port: %u\r\n",
 			       ws->config->udp_port);
 		SEND_ERR(ret);
 
 		if (ws->config->rekey_time > 0) {
 			ret =
-			    tls_printf(ws->session, "X-DTLS-Rekey-Time: %u\r\n",
+			    cstp_printf(ws, "X-DTLS-Rekey-Time: %u\r\n",
 				       (unsigned)(ws->config->rekey_time + 10));
 			SEND_ERR(ret);
 
 			/* This is our private extension */
 			if (ws->config->rekey_method == REKEY_METHOD_SSL) {
 				ret =
-				    tls_puts(ws->session,
+				    cstp_puts(ws,
 					     "X-DTLS-Rekey-Method: ssl\r\n");
 				SEND_ERR(ret);
 			}
 		}
 
 		ret =
-		    tls_printf(ws->session, "X-DTLS-Keepalive: %u\r\n",
+		    cstp_printf(ws, "X-DTLS-Keepalive: %u\r\n",
 			       ws->config->keepalive);
 		SEND_ERR(ret);
 
 		oclog(ws, LOG_DEBUG, "DTLS ciphersuite: %s",
 		      ws->req.selected_ciphersuite->oc_name);
 		ret =
-		    tls_printf(ws->session, "X-DTLS-CipherSuite: %s\r\n",
+		    cstp_printf(ws, "X-DTLS-CipherSuite: %s\r\n",
 			       ws->req.selected_ciphersuite->oc_name);
 		SEND_ERR(ret);
 
@@ -1815,7 +1826,7 @@ static int connect_handler(worker_st * ws)
 			ws->vinfo.mtu - proto_overhead - ws->crypto_overhead);
 
 		ret =
-		    tls_printf(ws->session, "X-DTLS-MTU: %u\r\n", ws->conn_mtu);
+		    cstp_printf(ws, "X-DTLS-MTU: %u\r\n", ws->conn_mtu);
 		SEND_ERR(ret);
 		oclog(ws, LOG_DEBUG, "suggesting DTLS MTU %u", ws->conn_mtu);
 
@@ -1833,7 +1844,7 @@ static int connect_handler(worker_st * ws)
 	}
 
 	/* hack for openconnect. It uses only a single MTU value */
-	ret = tls_printf(ws->session, "X-CSTP-MTU: %u\r\n", ws->conn_mtu);
+	ret = cstp_printf(ws, "X-CSTP-MTU: %u\r\n", ws->conn_mtu);
 	SEND_ERR(ret);
 
 	if (ws->buffer_size <= ws->conn_mtu + CSTP_OVERHEAD) {
@@ -1847,15 +1858,15 @@ static int connect_handler(worker_st * ws)
 
 	if (ws->config->banner) {
 		ret =
-		    tls_printf(ws->session, "X-CSTP-Banner: %s\r\n",
+		    cstp_printf(ws, "X-CSTP-Banner: %s\r\n",
 			       ws->config->banner);
 		SEND_ERR(ret);
 	}
 
-	ret = tls_puts(ws->session, "\r\n");
+	ret = cstp_puts(ws, "\r\n");
 	SEND_ERR(ret);
 
-	ret = tls_uncork(ws->session);
+	ret = cstp_uncork(ws);
 	SEND_ERR(ret);
 
 	/* start dead peer detection */
@@ -1896,12 +1907,15 @@ static int connect_handler(worker_st * ws)
 
 			oclog(ws, LOG_TRANSFER_DEBUG,
 			      "sending disconnect message in TLS channel");
-			ret = tls_send(ws->session, ws->buffer, 8);
-			GNUTLS_FATAL_ERR_CMD(ret, exit_worker(ws));
+			ret = cstp_send(ws, ws->buffer, 8);
+			FATAL_ERR_CMD(ws, ret, exit_worker(ws));
 			goto exit;
 		}
 
-		tls_pending = gnutls_record_check_pending(ws->session);
+		if (ws->session != NULL)
+			tls_pending = gnutls_record_check_pending(ws->session);
+		else
+			tls_pending = 0;
 
 		if (ws->dtls_session != NULL && ws->udp_state > UP_WAIT_FD) {
 			dtls_pending =
@@ -1979,10 +1993,10 @@ static int connect_handler(worker_st * ws)
 	return 0;
 
  exit:
-	tls_close(ws->session);
+	cstp_close(ws);
 	/*gnutls_deinit(ws->session); */
 	if (ws->udp_state == UP_ACTIVE && ws->dtls_session) {
-		tls_close(ws->dtls_session);
+		dtls_close(ws);
 		/*gnutls_deinit(ws->dtls_session); */
 	}
 
@@ -2009,31 +2023,37 @@ static int parse_data(struct worker_st *ws, gnutls_session_t ts,	/* the interfac
 		break;
 	case AC_PKT_DPD_OUT:
 		if (ws->session == ts) {
-			ret = tls_send(ts, "STF\x01\x00\x00\x04\x00", 8);
+			ret = cstp_send(ws, "STF\x01\x00\x00\x04\x00", 8);
 
 			oclog(ws, LOG_TRANSFER_DEBUG,
 			      "received TLS DPD; sent response (%d bytes)",
 			      ret);
+
+			if (ret < 0) {
+				oclog(ws, LOG_ERR, "could not send data: %d", ret);
+				return -1;
+			}
 		} else {
 			/* Use DPD for MTU discovery in DTLS */
 			ws->buffer[0] = AC_PKT_DPD_RESP;
 
-			ret = tls_send(ts, ws->buffer, 1);
+			ret = dtls_send(ws, ws->buffer, 1);
 			if (ret == GNUTLS_E_LARGE_PACKET) {
 				mtu_not_ok(ws);
-				ret = tls_send(ts, ws->buffer, 1);
+				ret = dtls_send(ws, ws->buffer, 1);
 			}
 
 			oclog(ws, LOG_TRANSFER_DEBUG,
 			      "received DTLS DPD; sent response (%d bytes)",
 			      ret);
+
+			if (ret < 0) {
+				oclog(ws, LOG_ERR, "could not send TLS data: %s",
+				      gnutls_strerror(ret));
+				return -1;
+			}
 		}
 
-		if (ret < 0) {
-			oclog(ws, LOG_ERR, "could not send TLS data: %s",
-			      gnutls_strerror(ret));
-			return -1;
-		}
 		break;
 	case AC_PKT_DISCONN:
 		oclog(ws, LOG_DEBUG, "received BYE packet; exiting");

src/worker.h

@@ -142,6 +142,7 @@ typedef struct worker_st {
 
 	int cmd_fd;
 	int conn_fd;
+	sock_type_t conn_type; /* AF_UNIX or something else */
 	
 	http_parser *parser;
 	struct cfg_st *config;