ref: eb1be5b4df533c4e5100296fb042e274da435b5b
dir: /sys/src/cmd/ip/ppp/ppp.h/
typedef struct Tcpc Tcpc; typedef struct Pstate Pstate; typedef struct Chap Chap; typedef struct Qualstats Qualstats; typedef struct Comptype Comptype; typedef struct Uncomptype Uncomptype; typedef struct PPP PPP; typedef struct Lcpmsg Lcpmsg; typedef struct Lcpopt Lcpopt; typedef struct Qualpkt Qualpkt; typedef struct Block Block; typedef uchar Ipaddr[IPaddrlen]; #pragma incomplete Tcpc /* * data blocks */ struct Block { Block *next; Block *flist; Block *list; /* chain of block lists */ uchar *rptr; /* first unconsumed uchar */ uchar *wptr; /* first empty uchar */ uchar *lim; /* 1 past the end of the buffer */ uchar *base; /* start of the buffer */ uchar flags; void *flow; ulong pc; ulong bsz; }; #define BLEN(b) ((b)->wptr-(b)->rptr) enum { /* block flags */ S_DELIM = (1<<0), S_HANGUP = (1<<1), S_RHANGUP = (1<<2), /* queue states */ QHUNGUP = (1<<0), QFLOW = (1<<1), /* queue is flow controlled */ }; Block* allocb(int); void freeb(Block*); Block* concat(Block*); int blen(Block*); Block* pullup(Block*, int); Block* padb(Block*, int); Block* btrim(Block*, int, int); Block* copyb(Block*, int); int pullb(Block**, int); enum { HDLC_frame= 0x7e, HDLC_esc= 0x7d, /* PPP frame fields */ PPP_addr= 0xff, PPP_ctl= 0x3, PPP_initfcs= 0xffff, PPP_goodfcs= 0xf0b8, /* PPP phases */ Pdead= 0, Plink, /* doing LCP */ Pauth, /* doing chap */ Pnet, /* doing IPCP, CCP */ Pterm, /* closing down */ /* PPP protocol types */ Pip= 0x21, /* ip v4 */ Pipv6= 0x57, /* ip v6 */ Pvjctcp= 0x2d, /* compressing van jacobson tcp */ Pvjutcp= 0x2f, /* uncompressing van jacobson tcp */ Pcdata= 0xfd, /* compressed datagram */ Pipcp= 0x8021, /* ip control */ Pecp= 0x8053, /* encryption control */ Pccp= 0x80fd, /* compressed datagram control */ Plcp= 0xc021, /* link control */ Ppasswd= 0xc023, /* passwd authentication */ Plqm= 0xc025, /* link quality monitoring */ Pchap= 0xc223, /* challenge/response */ /* LCP codes */ Lconfreq= 1, Lconfack= 2, Lconfnak= 3, Lconfrej= 4, Ltermreq= 5, Ltermack= 6, Lcoderej= 7, Lprotorej= 8, Lechoreq= 9, Lechoack= 10, Ldiscard= 11, Lresetreq= 14, Lresetack= 15, /* Lcp configure options */ Omtu= 1, Octlmap= 2, Oauth= 3, Oquality= 4, Omagic= 5, Opc= 7, Oac= 8, /* authentication protocols */ APmd5= 5, APmschap= 128, APmschapv2= 129, APpasswd= Ppasswd, /* use Pap, not Chap */ /* lcp flags */ Fmtu= 1<<Omtu, Fctlmap= 1<<Octlmap, Fauth= 1<<Oauth, Fquality= 1<<Oquality, Fmagic= 1<<Omagic, Fpc= 1<<Opc, Fac= 1<<Oac, /* Chap codes */ Cchallenge= 1, Cresponse= 2, Csuccess= 3, Cfailure= 4, /* Pap codes */ Pauthreq= 1, Pauthack= 2, Pauthnak= 3, /* Chap state */ Cunauth= 0, Cchalsent, Cauthfail, Cauthok, /* link states */ Sclosed= 0, Sclosing, Sreqsent, Sackrcvd, Sacksent, Sopened, /* ccp configure options */ Ocoui= 0, /* proprietary compression */ Ocstac= 17, /* stac electronics LZS */ Ocmppc= 18, /* microsoft ppc */ Octhwack= 31, /* thwack; unofficial */ /* ccp flags */ Fcoui= 1<<Ocoui, Fcstac= 1<<Ocstac, Fcmppc= 1<<Ocmppc, Fcthwack= 1<<Octhwack, /* ecp configure options */ Oeoui= 0, /* proprietary compression */ Oedese= 1, /* DES */ /* ecp flags */ Feoui= 1<<Oeoui, Fedese= 1<<Oedese, /* ipcp configure options */ Oipaddrs= 1, Oipcompress= 2, Oipaddr= 3, Oipdns= 129, Oipwins= 130, Oipdns2= 131, Oipwins2= 132, /* ipcp flags */ Fipaddrs= 1<<Oipaddrs, Fipcompress= 1<<Oipcompress, Fipaddr= 1<<Oipaddr, Fipdns= 1<<8, // Oipdns, Fipwins= 1<<9, // Oipwins, Fipdns2= 1<<10, // Oipdns2, Fipwins2= 1<<11, // Oipwins2, Period= 5*1000, /* period of retransmit process (in ms) */ Timeout= 20, /* xmit timeout (in Periods) */ Buflen= 4096, MAX_STATES= 16, /* van jacobson compression states */ Defmtu= 1450, /* default that we will ask for */ Minmtu= 128, /* minimum that we will accept */ Maxmtu= 2000, /* maximum that we will accept */ }; struct Pstate { int proto; /* protocol type */ int timeout; /* for current state */ int rxtimeout; /* for current retransmit */ ulong flags; /* options received */ uchar id; /* id of current message */ uchar confid; /* id of current config message */ uchar termid; /* id of current termination message */ uchar rcvdconfid; /* id of last conf message received */ uchar state; /* PPP link state */ ulong optmask; /* which options to request */ int echoack; /* recieved echo ack */ int echotimeout; /* echo timeout */ }; /* server chap state */ struct Chap { int proto; /* chap proto */ int state; /* chap state */ uchar id; /* id of current message */ int timeout; /* for current state */ AuthInfo *ai; Chalstate *cs; }; struct Qualstats { ulong reports; ulong packets; ulong uchars; ulong discards; ulong errors; }; struct Comptype { void* (*init)(PPP*); Block* (*compress)(PPP*, ushort, Block*, int*); Block* (*resetreq)(void*, Block*); void (*fini)(void*); }; struct Uncomptype { void* (*init)(PPP*); Block* (*uncompress)(PPP*, Block*, int*, Block**); void (*resetack)(void*, Block*); void (*fini)(void*); }; struct PPP { QLock; int ipfd; /* fd to ip stack */ int ipcfd; /* fd to control channel of ip stack */ int mediain; /* fd to media */ int mediaout; /* fd to media */ char *net; /* ip stack to use */ int framing; /* non-zero to use framing characters */ Ipaddr local; Ipaddr curlocal; int localfrozen; Ipaddr remote; Ipaddr curremote; int remotefrozen; Ipaddr dns[2]; /* dns servers */ Ipaddr wins[2]; /* wins servers */ Block* inbuf; /* input buffer */ Block* outbuf; /* output buffer */ QLock outlock; /* and its lock */ ulong magic; /* magic number to detect loop backs */ ulong rctlmap; /* map of chars to ignore in rcvr */ ulong xctlmap; /* map of chars to excape in xmit */ int phase; /* PPP phase */ Pstate* lcp; /* lcp state */ Pstate* ccp; /* ccp state */ Pstate* ipcp; /* ipcp state */ Chap* chap; /* chap state */ Tcpc* ctcp; /* tcp compression state */ ulong mtu; /* maximum xmit size */ ulong mru; /* maximum recv size */ /* data compression */ int ctries; /* number of negotiation tries */ Comptype *ctype; /* compression virtual table */ void *cstate; /* compression state */ Uncomptype *unctype; /* uncompression virtual table */ void *uncstate; /* uncompression state */ /* encryption key */ uchar sendkey[16]; uchar recvkey[16]; int sendencrypted; /* authentication */ char chapname[256]; /* chap system name */ /* link quality monitoring */ int period; /* lqm period */ int timeout; /* time to next lqm packet */ Qualstats in; /* local */ Qualstats out; Qualstats pin; /* peer */ Qualstats pout; Qualstats sin; /* saved */ struct { ulong ipsend; ulong iprecv; ulong iprecvbadsrc; ulong iprecvnotup; ulong comp; ulong compin; ulong compout; ulong compreset; ulong uncomp; ulong uncompin; ulong uncompout; ulong uncompreset; ulong vjin; ulong vjout; ulong vjfail; } stat; }; extern Block* pppread(PPP*); extern int pppwrite(PPP*, Block*); extern void pppopen(PPP*, int, int, char*, Ipaddr, Ipaddr, int, int); struct Lcpmsg { uchar code; uchar id; uchar len[2]; uchar data[1]; }; struct Lcpopt { uchar type; uchar len; uchar data[1]; }; struct Qualpkt { uchar magic[4]; uchar lastoutreports[4]; uchar lastoutpackets[4]; uchar lastoutuchars[4]; uchar peerinreports[4]; uchar peerinpackets[4]; uchar peerindiscards[4]; uchar peerinerrors[4]; uchar peerinuchars[4]; uchar peeroutreports[4]; uchar peeroutpackets[4]; uchar peeroutuchars[4]; }; extern Block* compress(Tcpc*, Block*, int*); extern void compress_error(Tcpc*); extern Tcpc* compress_init(Tcpc*); extern int compress_negotiate(Tcpc*, uchar*); extern Block* tcpcompress(Tcpc*, Block*, int*); extern Block* tcpuncompress(Tcpc*, Block*, int); extern Block* alloclcp(int, int, int, Lcpmsg**); extern ushort ptclcsum(Block*, int, int); extern ushort ptclbsum(uchar*, int); extern ushort ipcsum(uchar*); void getasymkey(uchar *key, uchar *masterkey, int send, int server); extern Comptype cmppc; extern Uncomptype uncmppc; extern Comptype cthwack; extern Uncomptype uncthwack; extern void netlog(char*, ...); #pragma varargck argpos netlog 1 extern char *LOG;