4 /* definitions for kernel PPP module
5 Michael Callahan <callahan@maths.ox.ac.uk>
8 /* $Id: ppp.h,v 1.3 1994/05/27 00:59:24 paulus Exp $ */
10 /* how many PPP units? */
13 #define PPP_VERSION "0.2.7"
15 /* line discipline number */
18 /* Extended asyncmap - allows any character to be escaped. */
19 typedef u_long ext_accm[8];
21 /* Magic value for the ppp structure */
22 #define PPP_MAGIC 0x5002
24 #define PPPIOCGFLAGS 0x5490 /* get configuration flags */
25 #define PPPIOCSFLAGS 0x5491 /* set configuration flags */
26 #define PPPIOCGASYNCMAP 0x5492 /* get async map */
27 #define PPPIOCSASYNCMAP 0x5493 /* set async map */
28 #define PPPIOCGUNIT 0x5494 /* get ppp unit number */
29 #define PPPIOCSINPSIG 0x5495 /* set input ready signal */
30 #define PPPIOCSDEBUG 0x5497 /* set debug level */
31 #define PPPIOCGDEBUG 0x5498 /* get debug level */
32 #define PPPIOCGSTAT 0x5499 /* read PPP statistic information */
33 #define PPPIOCGTIME 0x549A /* read time delta information */
34 #define PPPIOCGXASYNCMAP 0x549B /* get async table */
35 #define PPPIOCSXASYNCMAP 0x549C /* set async table */
36 #define PPPIOCSMRU 0x549D /* set receive unit size for PPP */
37 #define PPPIOCRASYNCMAP 0x549E /* set receive async map */
38 #define PPPIOCSMAXCID 0x549F /* set the maximum compression slot id */
40 /* special characters in the framing protocol */
41 #define PPP_ALLSTATIONS 0xff /* All-Stations broadcast address */
42 #define PPP_UI 0x03 /* Unnumbered Information */
43 #define PPP_FLAG 0x7E /* frame delimiter -- marks frame boundaries */
44 #define PPP_ADDRESS 0xFF /* first character of frame <-- (may be */
45 #define PPP_CONTROL 0x03 /* second character of frame <-- compressed)*/
46 #define PPP_TRANS 0x20 /* Asynchronous transparency modifier */
47 #define PPP_ESC 0x7d /* escape charecter -- next character is
48 data, and the PPP_TRANS bit should be
49 toggled. PPP_ESC PPP_FLAG is illegal */
51 /* protocol numbers */
52 #define PROTO_IP 0x0021
53 #define PROTO_VJCOMP 0x002d
54 #define PROTO_VJUNCOMP 0x002f
57 #define PPP_FCS_INIT 0xffff
58 #define PPP_FCS_GOOD 0xf0b8
64 #define PPP_MRU PPP_MTU
67 #define SC_COMP_PROT 0x00000001 /* protocol compression (output) */
68 #define SC_COMP_AC 0x00000002 /* header compression (output) */
69 #define SC_COMP_TCP 0x00000004 /* TCP (VJ) compression (output) */
70 #define SC_NO_TCP_CCID 0x00000008 /* disable VJ connection-id comp. */
71 #define SC_REJ_COMP_AC 0x00000010 /* reject adrs/ctrl comp. on input */
72 #define SC_REJ_COMP_TCP 0x00000020 /* reject TCP (VJ) comp. on input */
73 #define SC_ENABLE_IP 0x00000100 /* IP packets may be exchanged */
74 #define SC_IP_DOWN 0x00000200 /* give ip frames to pppd */
75 #define SC_IP_FLUSH 0x00000400 /* "next time" flag for IP_DOWN */
76 #define SC_DEBUG 0x00010000 /* enable debug messages */
77 #define SC_LOG_INPKT 0x00020000 /* log contents of good pkts recvd */
78 #define SC_LOG_OUTPKT 0x00040000 /* log contents of pkts sent */
79 #define SC_LOG_RAWIN 0x00080000 /* log all chars received */
80 #define SC_LOG_FLUSH 0x00100000 /* log all chars flushed */
82 /* Flag bits to determine state of input characters */
83 #define SC_RCV_B7_0 0x01000000 /* have rcvd char with bit 7 = 0 */
84 #define SC_RCV_B7_1 0x02000000 /* have rcvd char with bit 7 = 0 */
85 #define SC_RCV_EVNP 0x04000000 /* have rcvd char with even parity */
86 #define SC_RCV_ODDP 0x08000000 /* have rcvd char with odd parity */
88 #define SC_MASK 0x0fffffff /* bits that user can change */
90 /* flag for doing transmitter lockout */
91 #define SC_XMIT_BUSY 0x10000000 /* ppp_write_wakeup is active */
94 * This is the format of the data buffer of a LQP packet. The packet data
95 * is sent/received to the peer.
98 struct ppp_lqp_packet_hdr {
99 unsigned long LastOutLQRs; /* Copied from PeerOutLQRs */
100 unsigned long LastOutPackets; /* Copied from PeerOutPackets */
101 unsigned long LastOutOctets; /* Copied from PeerOutOctets */
102 unsigned long PeerInLQRs; /* Copied from SavedInLQRs */
103 unsigned long PeerInPackets; /* Copied from SavedInPackets */
104 unsigned long PeerInDiscards; /* Copied from SavedInDiscards */
105 unsigned long PeerInErrors; /* Copied from SavedInErrors */
106 unsigned long PeerInOctets; /* Copeid from SavedInOctets */
107 unsigned long PeerOutLQRs; /* Copied from OutLQRs, plus 1 */
108 unsigned long PeerOutPackets; /* Current ifOutUniPackets, + 1 */
109 unsigned long PeerOutOctets; /* Current ifOutOctets + LQR */
113 * This data is not sent to the remote. It is updated by the driver when
114 * a packet is received.
117 struct ppp_lqp_packet_trailer {
118 unsigned long SaveInLQRs; /* Current InLQRs on receiption */
119 unsigned long SaveInPackets; /* Current ifInUniPackets */
120 unsigned long SaveInDiscards; /* Current ifInDiscards */
121 unsigned long SaveInErrors; /* Current ifInErrors */
122 unsigned long SaveInOctets; /* Current ifInOctects */
126 * PPP LQP packet. The packet is changed by the driver immediately prior
127 * to transmission and updated upon receiption with the current values.
128 * So, it must be known to the driver as well as the pppd software.
131 struct ppp_lpq_packet {
132 unsigned long magic; /* current magic value */
133 struct ppp_lqp_packet_hdr hdr; /* Header fields for structure */
134 struct ppp_lqp_packet_trailer tail; /* Trailer fields (not sent) */
138 * PPP interface statistics. (used by LQP / pppstats)
142 unsigned long rbytes; /* bytes received */
143 unsigned long rcomp; /* compressed packets received */
144 unsigned long runcomp; /* uncompressed packets received */
145 unsigned long rothers; /* non-ip frames received */
146 unsigned long rerrors; /* received errors */
147 unsigned long roverrun; /* "buffer overrun" counter */
148 unsigned long tossed; /* packets discarded */
149 unsigned long runts; /* frames too short to process */
150 unsigned long rgiants; /* frames too large to process */
151 unsigned long sbytes; /* bytes sent */
152 unsigned long scomp; /* compressed packets sent */
153 unsigned long suncomp; /* uncompressed packets sent */
154 unsigned long sothers; /* non-ip frames sent */
155 unsigned long serrors; /* transmitter errors */
156 unsigned long sbusy; /* "transmitter busy" counter */
164 unsigned long ip_sjiffies; /* time when last IP frame sent */
165 unsigned long ip_rjiffies; /* time when last IP frame recvd*/
166 unsigned long nip_sjiffies; /* time when last NON-IP sent */
167 unsigned long nip_rjiffies; /* time when last NON-IP recvd */
173 int magic; /* magic value for structure */
175 /* Bitmapped flag fields. */
176 char inuse; /* are we allocated? */
177 char sending; /* "channel busy" indicator */
178 char escape; /* 0x20 if prev char was PPP_ESC*/
179 char toss; /* toss this frame */
181 unsigned int flags; /* miscellany */
183 ext_accm xmit_async_map; /* 1 bit means that given control
184 character is quoted on output*/
186 unsigned long recv_async_map; /* 1 bit means that given control
187 character is ignored on input*/
188 int mtu; /* maximum xmit frame size */
189 int mru; /* maximum receive frame size */
190 unsigned short fcs; /* FCS field of current frame */
192 /* Various fields. */
193 int line; /* PPP channel number */
194 struct tty_struct *tty; /* ptr to TTY structure */
195 struct device *dev; /* easy for intr handling */
196 struct slcompress *slcomp; /* for header compression */
197 unsigned long last_xmit; /* time of last transmission */
199 /* These are pointers to the malloc()ed frame buffers.
200 These buffers are used while processing a packet. If a packet
201 has to hang around for the user process to read it, it lingers in
202 the user buffers below. */
203 unsigned char *rbuff; /* receiver buffer */
204 unsigned char *xbuff; /* transmitter buffer */
205 unsigned char *cbuff; /* compression buffer */
207 /* These are the various pointers into the buffers. */
208 unsigned char *rhead; /* RECV buffer pointer (head) */
209 unsigned char *rend; /* RECV buffer pointer (end) */
210 int rcount; /* PPP receive counter */
211 unsigned char *xhead; /* XMIT buffer pointer (head) */
212 unsigned char *xtail; /* XMIT buffer pointer (end) */
214 /* Structures for interfacing with the user process. */
215 #define RBUFSIZE 4000
216 unsigned char *us_rbuff; /* circular incoming packet buf.*/
217 unsigned char *us_rbuff_end; /* end of allocated space */
218 unsigned char *us_rbuff_head; /* head of waiting packets */
219 unsigned char *us_rbuff_tail; /* tail of waiting packets */
220 unsigned char us_rbuff_lock; /* lock: bit 0 head bit 1 tail */
221 int inp_sig; /* input ready signal for pgrp */
222 int inp_sig_pid; /* process to get notified */
224 /* items to support the select() function */
225 struct wait_queue *write_wait; /* queue for reading processes */
226 struct wait_queue *read_wait; /* queue for writing processes */
228 /* PPP interface statistics. */
229 struct ppp_stats stats; /* statistic information */
231 /* PPP demand dial information. */
232 struct ppp_ddinfo ddinfo; /* demand dial information */
235 #endif /* __KERNEL__ */
236 #endif /* _LINUX_PPP_H */