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Diffstat (limited to 'drivers/net/slip/slip.h')
-rw-r--r--drivers/net/slip/slip.h105
1 files changed, 105 insertions, 0 deletions
diff --git a/drivers/net/slip/slip.h b/drivers/net/slip/slip.h
new file mode 100644
index 000000000..3d7f88b33
--- /dev/null
+++ b/drivers/net/slip/slip.h
@@ -0,0 +1,105 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * slip.h Define the SLIP device driver interface and constants.
+ *
+ * NOTE: THIS FILE WILL BE MOVED TO THE LINUX INCLUDE DIRECTORY
+ * AS SOON AS POSSIBLE!
+ *
+ * Version: @(#)slip.h 1.2.0 03/28/93
+ *
+ * Fixes:
+ * Alan Cox : Added slip mtu field.
+ * Matt Dillon : Printable slip (borrowed from net2e)
+ * Alan Cox : Added SL_SLIP_LOTS
+ * Dmitry Gorodchanin : A lot of changes in the 'struct slip'
+ * Dmitry Gorodchanin : Added CSLIP statistics.
+ * Stanislav Voronyi : Make line checking as created by
+ * Igor Chechik, RELCOM Corp.
+ * Craig Schlenter : Fixed #define bug that caused
+ * CSLIP telnets to hang in 1.3.61-6
+ *
+ * Author: Fred N. van Kempen, <waltje@uwalt.nl.mugnet.org>
+ */
+#ifndef _LINUX_SLIP_H
+#define _LINUX_SLIP_H
+
+
+#if defined(CONFIG_INET) && defined(CONFIG_SLIP_COMPRESSED)
+# define SL_INCLUDE_CSLIP
+#endif
+
+#ifdef SL_INCLUDE_CSLIP
+# define SL_MODE_DEFAULT SL_MODE_ADAPTIVE
+#else
+# define SL_MODE_DEFAULT SL_MODE_SLIP
+#endif
+
+/* SLIP configuration. */
+#define SL_NRUNIT 256 /* MAX number of SLIP channels;
+ This can be overridden with
+ insmod -oslip_maxdev=nnn */
+#define SL_MTU 296 /* 296; I am used to 600- FvK */
+
+/* some arch define END as assembly function ending, just undef it */
+#undef END
+/* SLIP protocol characters. */
+#define END 0300 /* indicates end of frame */
+#define ESC 0333 /* indicates byte stuffing */
+#define ESC_END 0334 /* ESC ESC_END means END 'data' */
+#define ESC_ESC 0335 /* ESC ESC_ESC means ESC 'data' */
+
+
+struct slip {
+ int magic;
+
+ /* Various fields. */
+ struct tty_struct *tty; /* ptr to TTY structure */
+ struct net_device *dev; /* easy for intr handling */
+ spinlock_t lock;
+ struct work_struct tx_work; /* Flushes transmit buffer */
+
+#ifdef SL_INCLUDE_CSLIP
+ struct slcompress *slcomp; /* for header compression */
+ unsigned char *cbuff; /* compression buffer */
+#endif
+
+ /* These are pointers to the malloc()ed frame buffers. */
+ unsigned char *rbuff; /* receiver buffer */
+ int rcount; /* received chars counter */
+ unsigned char *xbuff; /* transmitter buffer */
+ unsigned char *xhead; /* pointer to next byte to XMIT */
+ int xleft; /* bytes left in XMIT queue */
+ int mtu; /* Our mtu (to spot changes!) */
+ int buffsize; /* Max buffers sizes */
+
+#ifdef CONFIG_SLIP_MODE_SLIP6
+ int xdata, xbits; /* 6 bit slip controls */
+#endif
+
+ unsigned long flags; /* Flag values/ mode etc */
+#define SLF_INUSE 0 /* Channel in use */
+#define SLF_ESCAPE 1 /* ESC received */
+#define SLF_ERROR 2 /* Parity, etc. error */
+#define SLF_KEEPTEST 3 /* Keepalive test flag */
+#define SLF_OUTWAIT 4 /* is outpacket was flag */
+
+ unsigned char mode; /* SLIP mode */
+ unsigned char leased;
+ pid_t pid;
+#define SL_MODE_SLIP 0
+#define SL_MODE_CSLIP 1
+#define SL_MODE_SLIP6 2 /* Matt Dillon's printable slip */
+#define SL_MODE_CSLIP6 (SL_MODE_SLIP6|SL_MODE_CSLIP)
+#define SL_MODE_AX25 4
+#define SL_MODE_ADAPTIVE 8
+#ifdef CONFIG_SLIP_SMART
+ unsigned char outfill; /* # of sec between outfill packet */
+ unsigned char keepalive; /* keepalive seconds */
+ struct timer_list outfill_timer;
+ struct timer_list keepalive_timer;
+#endif
+};
+
+#define SLIP_MAGIC 0x5302
+
+#endif /* _LINUX_SLIP.H */