Move tun_mainloop() to mainloop.c

It can't live in tun.c because we're about to stop that being built on
Windows.

Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>

mainloop.c

@@ -45,6 +45,66 @@ int queue_new_packet(struct pkt **q, void *buf, int len)
 	return 0;
 }
 
+static struct pkt *out_pkt;
+
+/* This is here because it's generic and hence can't live in either of the
+   tun*.c files for specific platforms */
+int tun_mainloop(struct openconnect_info *vpninfo, int *timeout)
+{
+	int work_done = 0;
+
+	if (read_fd_monitored(vpninfo, tun)) {
+		while (1) {
+			int len = vpninfo->ip_info.mtu;
+			int new_pkt = 0;
+
+			if (!out_pkt) {
+				new_pkt = 1;
+				out_pkt = malloc(sizeof(struct pkt) + len);
+				if (!out_pkt) {
+					vpn_progress(vpninfo, PRG_ERR, "Allocation failed\n");
+					break;
+				}
+				out_pkt->len = len;
+			}
+
+			if (os_read_tun(vpninfo, out_pkt, new_pkt))
+				break;
+
+			vpninfo->stats.tx_pkts++;
+			vpninfo->stats.tx_bytes += out_pkt->len;
+
+			queue_packet(&vpninfo->outgoing_queue, out_pkt);
+			out_pkt = NULL;
+
+			work_done = 1;
+			vpninfo->outgoing_qlen++;
+			if (vpninfo->outgoing_qlen == vpninfo->max_qlen) {
+				unmonitor_read_fd(vpninfo, tun);
+				break;
+			}
+		}
+	} else if (vpninfo->outgoing_qlen < vpninfo->max_qlen) {
+		monitor_read_fd(vpninfo, tun);
+	}
+
+	while (vpninfo->incoming_queue) {
+		struct pkt *this = vpninfo->incoming_queue;
+
+		if (os_write_tun(vpninfo, this))
+			break;
+
+		vpninfo->stats.rx_pkts++;
+		vpninfo->stats.rx_bytes += this->len;
+
+		vpninfo->incoming_queue = this->next;
+
+		free(this);
+	}
+	/* Work is not done if we just got rid of packets off the queue */
+	return work_done;
+}
+
 /* Return value:
  *  = 0, when successfully paused (may call again)
  *  = -EINTR, if aborted locally via cmd_fd

openconnect-internal.h

@@ -454,7 +454,6 @@ void set_script_env(struct openconnect_info *vpninfo);
 int script_config_tun(struct openconnect_info *vpninfo, const char *reason);
 
 /* tun.c */
-int tun_mainloop(struct openconnect_info *vpninfo, int *timeout);
 void shutdown_tun(struct openconnect_info *vpninfo);
 int os_read_tun(struct openconnect_info *vpninfo, struct pkt *pkt, int new_pkt);
 int os_write_tun(struct openconnect_info *vpninfo, struct pkt *pkt);
@@ -511,7 +510,7 @@ int openconnect_local_cert_md5(struct openconnect_info *vpninfo,
 #endif
 
 /* mainloop.c */
-int vpn_add_pollfd(struct openconnect_info *vpninfo, int fd, short events);
+int tun_mainloop(struct openconnect_info *vpninfo, int *timeout);
 int queue_new_packet(struct pkt **q, void *buf, int len);
 void queue_packet(struct pkt **q, struct pkt *new);
 int keepalive_action(struct keepalive_info *ka, int *timeout);

tun.c

@@ -467,64 +467,6 @@ int openconnect_setup_tun_device(struct openconnect_info *vpninfo, char *vpnc_sc
 	return openconnect_setup_tun_fd(vpninfo, tun_fd);
 }
 
-static struct pkt *out_pkt;
-
-int tun_mainloop(struct openconnect_info *vpninfo, int *timeout)
-{
-	int work_done = 0;
-
-	if (read_fd_monitored(vpninfo, tun)) {
-		while (1) {
-			int len = vpninfo->ip_info.mtu;
-			int new_pkt = 0;
-
-			if (!out_pkt) {
-				new_pkt = 1;
-				out_pkt = malloc(sizeof(struct pkt) + len);
-				if (!out_pkt) {
-					vpn_progress(vpninfo, PRG_ERR, "Allocation failed\n");
-					break;
-				}
-				out_pkt->len = len;
-			}
-
-			if (os_read_tun(vpninfo, out_pkt, new_pkt))
-				break;
-
-			vpninfo->stats.tx_pkts++;
-			vpninfo->stats.tx_bytes += out_pkt->len;
-
-			queue_packet(&vpninfo->outgoing_queue, out_pkt);
-			out_pkt = NULL;
-
-			work_done = 1;
-			vpninfo->outgoing_qlen++;
-			if (vpninfo->outgoing_qlen == vpninfo->max_qlen) {
-				unmonitor_read_fd(vpninfo, tun);
-				break;
-			}
-		}
-	} else if (vpninfo->outgoing_qlen < vpninfo->max_qlen) {
-		monitor_read_fd(vpninfo, tun);
-	}
-
-	while (vpninfo->incoming_queue) {
-		struct pkt *this = vpninfo->incoming_queue;
-
-		if (os_write_tun(vpninfo, this))
-			break;
-
-		vpninfo->stats.rx_pkts++;
-		vpninfo->stats.rx_bytes += this->len;
-
-		vpninfo->incoming_queue = this->next;
-
-		free(this);
-	}
-	/* Work is not done if we just got rid of packets off the queue */
-	return work_done;
-}
-
 void shutdown_tun(struct openconnect_info *vpninfo)
 {
 #ifdef _WIN32