X-Git-Url: http://git.ozlabs.org/?p=ppp.git;a=blobdiff_plain;f=modules%2Fppp.c;h=71add62755e15db26004ba37ca430da14eb6f1e1;hp=c58831810ae8febfaa101c7a2caff3955779e5a5;hb=cac90e238d9c18c513cf0d45dfdd1e217df2a176;hpb=e77161b1ab421e1f36bd0e0516f01c27712853ab diff --git a/modules/ppp.c b/modules/ppp.c index c588318..71add62 100644 --- a/modules/ppp.c +++ b/modules/ppp.c @@ -24,7 +24,7 @@ * OBLIGATION TO PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, * OR MODIFICATIONS. * - * $Id: ppp.c,v 1.6 1996/06/26 00:53:38 paulus Exp $ + * $Id: ppp.c,v 1.9 1997/03/04 03:31:35 paulus Exp $ */ /* @@ -66,6 +66,14 @@ #include #include "ppp_mod.h" +/* + * Modifications marked with #ifdef PRIOQ are for priority queueing of + * interactive traffic, and are due to Marko Zec . + */ +#ifdef PRIOQ +#include +#endif /* PRIOQ */ + #ifdef __STDC__ #define __P(x) x #else @@ -129,6 +137,35 @@ typedef struct upperstr { #define US_LASTMOD 8 /* no PPP modules below us */ #define US_DBGLOG 0x10 /* log various occurrences */ + +#ifdef PRIOQ +static u_char max_band=0; +static u_char def_band=0; + +#define IPPORT_DEFAULT 65535 + +/* + * Port priority table + * Highest priority ports are listed first, lowest are listed last. + * ICMP & packets using unlisted ports will be treated as "default". + * If IPPORT_DEFAULT is not listed here, "default" packets will be + * assigned lowest priority. + * Each line should be terminated with "0". + * Line containing only "0" marks the end of the list. + */ + +static u_short prioq_table[]= { + 113, 53, 0, + 22, 23, 513, 517, 518, 0, + 514, 21, 79, 111, 0, + 25, 109, 110, 0, + IPPORT_DEFAULT, 0, + 20, 70, 80, 8001, 8008, 8080, 0, /* 8001,8008,8080 - common proxy ports */ +0 }; + +#endif /* PRIOQ */ + + static upperstr_t *minor_devs = NULL; static upperstr_t *ppas = NULL; @@ -159,10 +196,15 @@ static void debug_dump __P((queue_t *, mblk_t *)); static upperstr_t *find_dest __P((upperstr_t *, int)); static int putctl2 __P((queue_t *, int, int, int)); static int putctl4 __P((queue_t *, int, int, int)); +static int pass_packet __P((upperstr_t *ppa, mblk_t *mp, int outbound)); #define PPP_ID 0xb1a6 static struct module_info ppp_info = { +#ifdef PRIOQ + PPP_ID, "ppp", 0, 512, 512, 384 +#else PPP_ID, "ppp", 0, 512, 512, 128 +#endif /* PRIOQ */ }; static struct qinit pppurint = { @@ -242,10 +284,37 @@ pppopen(q, dev, oflag, sflag) upperstr_t *up; upperstr_t **prevp; minor_t mn; +#ifdef PRIOQ + u_short *ptr; + u_char new_band; +#endif /* PRIOQ */ if (q->q_ptr) DRV_OPEN_OK(dev); /* device is already open */ +#ifdef PRIOQ + /* Calculate max_bband & def_band from definitions in prioq.h + This colud be done at some more approtiate time (less often) + but this way it works well so I'll just leave it here */ + + max_band = 1; + def_band = 0; + ptr = prioq_table; + while (*ptr) { + new_band = 1; + while (*ptr) + if (*ptr++ == IPPORT_DEFAULT) { + new_band = 0; + def_band = max_band; + } + max_band += new_band; + ptr++; + } + if (def_band) + def_band = max_band - def_band; + --max_band; +#endif /* PRIOQ */ + if (sflag == CLONEOPEN) { mn = 0; for (prevp = &minor_devs; (up = *prevp) != 0; prevp = &up->nextmn) { @@ -423,6 +492,9 @@ pppuwput(q, mp) mblk_t *mq; struct ppp_idle *pip; int len; +#ifdef PRIOQ + queue_t *tlq; +#endif /* PRIOQ */ us = (upperstr_t *) q->q_ptr; switch (mp->b_datap->db_type) { @@ -482,6 +554,18 @@ pppuwput(q, mp) putctl2(lq, M_CTL, PPPCTL_UNIT, us->ppa_id); putctl4(lq, M_CTL, PPPCTL_MRU, us->mru); putctl4(lq, M_CTL, PPPCTL_MTU, us->mtu); +#ifdef PRIOQ + /* Lower tty driver's queue hiwat/lowat from default 4096/128 + to 256/128 since we don't want queueing of data on + output to physical device */ + + freezestr(lq); + for (tlq = lq; tlq->q_next != NULL; tlq = tlq->q_next) + ; + strqset(tlq, QHIWAT, 0, 256); + strqset(tlq, QLOWAT, 0, 128); + unfreezestr(lq); +#endif /* PRIOQ */ break; case I_UNLINK: @@ -667,7 +751,6 @@ pppuwput(q, mp) #ifdef LACHTCP case SIOCSIFNAME: - printf("SIOCSIFNAME\n"); /* Sent from IP down to us. Attach the ifstats structure. */ if (iop->ioc_count != sizeof(struct ifreq) || us->ppa == 0) break; @@ -715,7 +798,6 @@ pppuwput(q, mp) break; case SIOCGIFFLAGS: - printf("SIOCGIFFLAGS\n"); if (!(us->flags & US_CONTROL)) { if (us->ppa) us = us->ppa; @@ -727,7 +809,6 @@ pppuwput(q, mp) break; case SIOCSIFFLAGS: - printf("SIOCSIFFLAGS\n"); if (!(us->flags & US_CONTROL)) { if (us->ppa) us = us->ppa; @@ -739,7 +820,6 @@ pppuwput(q, mp) break; case SIOCSIFADDR: - printf("SIOCSIFADDR\n"); if (!(us->flags & US_CONTROL)) { if (us->ppa) us = us->ppa; @@ -972,6 +1052,68 @@ dlpi_request(q, mp, us) DPRINT2("dlpi data too large (%d > %d)\n", len, ppa->mtu); break; } + mp->b_band = 0; +#ifdef PRIOQ + /* Extract s_port & d_port from IP-packet, the code is a bit + dirty here, but so am I, too... */ + if (mp->b_datap->db_type == M_PROTO && us->sap == PPP_IP + && mp->b_cont != 0) { + u_char *bb, *tlh; + int iphlen, len; + u_short *ptr; + u_char band_unset, cur_band, syn; + u_short s_port, d_port; + + bb = mp->b_cont->b_rptr; /* bb points to IP-header*/ + len = mp->b_cont->b_wptr - mp->b_cont->b_rptr; + syn = 0; + s_port = IPPORT_DEFAULT; + d_port = IPPORT_DEFAULT; + if (len >= 20) { /* 20 = minimum length of IP header */ + iphlen = (bb[0] & 0x0f) * 4; + tlh = bb + iphlen; + len -= iphlen; + switch (bb[9]) { + case IPPROTO_TCP: + if (len >= 20) { /* min length of TCP header */ + s_port = (tlh[0] << 8) + tlh[1]; + d_port = (tlh[2] << 8) + tlh[3]; + syn = tlh[13] & 0x02; + } + break; + case IPPROTO_UDP: + if (len >= 8) { /* min length of UDP header */ + s_port = (tlh[0] << 8) + tlh[1]; + d_port = (tlh[2] << 8) + tlh[3]; + } + break; + } + } + + /* + * Now calculate b_band for this packet from the + * port-priority table. + */ + ptr = prioq_table; + cur_band = max_band; + band_unset = 1; + while (*ptr) { + while (*ptr && band_unset) + if (s_port == *ptr || d_port == *ptr++) { + mp->b_band = cur_band; + band_unset = 0; + break; + } + ptr++; + cur_band--; + } + if (band_unset) + mp->b_band = def_band; + /* It may be usable to urge SYN packets a bit */ + if (syn) + mp->b_band++; + } +#endif /* PRIOQ */ /* this assumes PPP_HDRLEN <= sizeof(dl_unitdata_req_t) */ if (mp->b_datap->db_ref > 1) { np = allocb(PPP_HDRLEN, BPRI_HI); @@ -1122,12 +1264,19 @@ send_data(mp, us) } if ((q = ppa->lowerq) == 0) { /* try to send it up the control stream */ - if (canputnext(ppa->q)) { - putnext(ppa->q, mp); + if (bcanputnext(ppa->q, mp->b_band)) { + /* + * The message seems to get corrupted for some reason if + * we just send the message up as it is, so we send a copy. + */ + mblk_t *np = copymsg(mp); + freemsg(mp); + if (np != 0) + putnext(ppa->q, np); return 1; } } else { - if (canputnext(ppa->lowerq)) { + if (bcanputnext(ppa->lowerq, mp->b_band)) { /* * The lower write queue's put procedure just updates counters * and does a putnext. We call it so that on SMP systems, we