diff options
Diffstat (limited to 'usr.sbin/ppp/mp.c')
| -rw-r--r-- | usr.sbin/ppp/mp.c | 1209 |
1 files changed, 0 insertions, 1209 deletions
diff --git a/usr.sbin/ppp/mp.c b/usr.sbin/ppp/mp.c deleted file mode 100644 index 095f9bb..0000000 --- a/usr.sbin/ppp/mp.c +++ /dev/null @@ -1,1209 +0,0 @@ -/*- - * Copyright (c) 1998 Brian Somers <brian@Awfulhak.org> - * All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * - * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - * - * $FreeBSD$ - */ - -#include <sys/param.h> -#include <netinet/in.h> -#include <netinet/in_systm.h> -#include <netinet/ip.h> -#include <arpa/inet.h> -#include <net/if_dl.h> -#include <sys/socket.h> -#include <sys/un.h> - -#include <errno.h> -#include <paths.h> -#include <stdarg.h> -#include <stdio.h> -#include <stdlib.h> -#include <string.h> -#include <sys/stat.h> -#include <termios.h> -#include <unistd.h> - -#include "layer.h" -#ifndef NONAT -#include "nat_cmd.h" -#endif -#include "vjcomp.h" -#include "ua.h" -#include "defs.h" -#include "command.h" -#include "mbuf.h" -#include "log.h" -#include "timer.h" -#include "fsm.h" -#include "iplist.h" -#include "throughput.h" -#include "slcompress.h" -#include "lqr.h" -#include "hdlc.h" -#include "ncpaddr.h" -#include "ipcp.h" -#include "auth.h" -#include "lcp.h" -#include "async.h" -#include "ccp.h" -#include "link.h" -#include "descriptor.h" -#include "physical.h" -#include "chat.h" -#include "proto.h" -#include "filter.h" -#include "mp.h" -#include "chap.h" -#include "cbcp.h" -#include "datalink.h" -#ifndef NORADIUS -#include "radius.h" -#endif -#include "ipv6cp.h" -#include "ncp.h" -#include "bundle.h" -#include "prompt.h" -#include "id.h" -#include "arp.h" - -void -peerid_Init(struct peerid *peer) -{ - peer->enddisc.class = 0; - *peer->enddisc.address = '\0'; - peer->enddisc.len = 0; - *peer->authname = '\0'; -} - -int -peerid_Equal(const struct peerid *p1, const struct peerid *p2) -{ - return !strcmp(p1->authname, p2->authname) && - p1->enddisc.class == p2->enddisc.class && - p1->enddisc.len == p2->enddisc.len && - !memcmp(p1->enddisc.address, p2->enddisc.address, p1->enddisc.len); -} - -static u_int32_t -inc_seq(unsigned is12bit, u_int32_t seq) -{ - seq++; - if (is12bit) { - if (seq & 0xfffff000) - seq = 0; - } else if (seq & 0xff000000) - seq = 0; - return seq; -} - -static int -isbefore(unsigned is12bit, u_int32_t seq1, u_int32_t seq2) -{ - u_int32_t max = (is12bit ? 0xfff : 0xffffff) - 0x200; - - if (seq1 > max) { - if (seq2 < 0x200 || seq2 > seq1) - return 1; - } else if ((seq1 > 0x200 || seq2 <= max) && seq1 < seq2) - return 1; - - return 0; -} - -static int -mp_ReadHeader(struct mp *mp, struct mbuf *m, struct mp_header *header) -{ - if (mp->local_is12bit) { - u_int16_t val; - - ua_ntohs(MBUF_CTOP(m), &val); - if (val & 0x3000) { - log_Printf(LogWARN, "Oops - MP header without required zero bits\n"); - return 0; - } - header->begin = val & 0x8000 ? 1 : 0; - header->end = val & 0x4000 ? 1 : 0; - header->seq = val & 0x0fff; - return 2; - } else { - ua_ntohl(MBUF_CTOP(m), &header->seq); - if (header->seq & 0x3f000000) { - log_Printf(LogWARN, "Oops - MP header without required zero bits\n"); - return 0; - } - header->begin = header->seq & 0x80000000 ? 1 : 0; - header->end = header->seq & 0x40000000 ? 1 : 0; - header->seq &= 0x00ffffff; - return 4; - } -} - -static void -mp_LayerStart(void *v __unused, struct fsm *fp __unused) -{ - /* The given FSM (ccp) is about to start up ! */ -} - -static void -mp_LayerUp(void *v __unused, struct fsm *fp) -{ - /* The given fsm (ccp) is now up */ - - bundle_CalculateBandwidth(fp->bundle); /* Against ccp_MTUOverhead */ -} - -static void -mp_LayerDown(void *v __unused, struct fsm *fp __unused) -{ - /* The given FSM (ccp) has been told to come down */ -} - -static void -mp_LayerFinish(void *v __unused, struct fsm *fp) -{ - /* The given fsm (ccp) is now down */ - if (fp->state == ST_CLOSED && fp->open_mode == OPEN_PASSIVE) - fsm_Open(fp); /* CCP goes to ST_STOPPED */ -} - -static void -mp_UpDown(void *v) -{ - struct mp *mp = (struct mp *)v; - int percent; - - percent = MAX(mp->link.stats.total.in.OctetsPerSecond, - mp->link.stats.total.out.OctetsPerSecond) * 800 / - mp->bundle->bandwidth; - if (percent >= mp->cfg.autoload.max) { - log_Printf(LogDEBUG, "%d%% saturation - bring a link up ?\n", percent); - bundle_AutoAdjust(mp->bundle, percent, AUTO_UP); - } else if (percent <= mp->cfg.autoload.min) { - log_Printf(LogDEBUG, "%d%% saturation - bring a link down ?\n", percent); - bundle_AutoAdjust(mp->bundle, percent, AUTO_DOWN); - } -} - -void -mp_StopAutoloadTimer(struct mp *mp) -{ - throughput_stop(&mp->link.stats.total); -} - -void -mp_CheckAutoloadTimer(struct mp *mp) -{ - if (mp->link.stats.total.SamplePeriod != mp->cfg.autoload.period) { - throughput_destroy(&mp->link.stats.total); - throughput_init(&mp->link.stats.total, mp->cfg.autoload.period); - throughput_callback(&mp->link.stats.total, mp_UpDown, mp); - } - - if (bundle_WantAutoloadTimer(mp->bundle)) - throughput_start(&mp->link.stats.total, "MP throughput", 1); - else - mp_StopAutoloadTimer(mp); -} - -void -mp_RestartAutoloadTimer(struct mp *mp) -{ - if (mp->link.stats.total.SamplePeriod != mp->cfg.autoload.period) - mp_CheckAutoloadTimer(mp); - else - throughput_clear(&mp->link.stats.total, THROUGHPUT_OVERALL, NULL); -} - -void -mp_Init(struct mp *mp, struct bundle *bundle) -{ - mp->peer_is12bit = mp->local_is12bit = 0; - mp->peer_mrru = mp->local_mrru = 0; - - peerid_Init(&mp->peer); - - mp->out.seq = 0; - mp->out.link = 0; - mp->out.af = AF_INET; - mp->seq.min_in = 0; - mp->seq.next_in = 0; - mp->inbufs = NULL; - mp->bundle = bundle; - - mp->link.type = LOGICAL_LINK; - mp->link.name = "mp"; - mp->link.len = sizeof *mp; - - mp->cfg.autoload.period = SAMPLE_PERIOD; - mp->cfg.autoload.min = mp->cfg.autoload.max = 0; - throughput_init(&mp->link.stats.total, mp->cfg.autoload.period); - throughput_callback(&mp->link.stats.total, mp_UpDown, mp); - mp->link.stats.parent = NULL; - mp->link.stats.gather = 0; /* Let the physical links gather stats */ - memset(mp->link.Queue, '\0', sizeof mp->link.Queue); - memset(mp->link.proto_in, '\0', sizeof mp->link.proto_in); - memset(mp->link.proto_out, '\0', sizeof mp->link.proto_out); - - mp->fsmp.LayerStart = mp_LayerStart; - mp->fsmp.LayerUp = mp_LayerUp; - mp->fsmp.LayerDown = mp_LayerDown; - mp->fsmp.LayerFinish = mp_LayerFinish; - mp->fsmp.object = mp; - - mpserver_Init(&mp->server); - - mp->cfg.mrru = 0; - mp->cfg.shortseq = NEG_ENABLED|NEG_ACCEPTED; - mp->cfg.negenddisc = NEG_ENABLED|NEG_ACCEPTED; - mp->cfg.enddisc.class = 0; - *mp->cfg.enddisc.address = '\0'; - mp->cfg.enddisc.len = 0; - - lcp_Init(&mp->link.lcp, mp->bundle, &mp->link, NULL); - ccp_Init(&mp->link.ccp, mp->bundle, &mp->link, &mp->fsmp); - - link_EmptyStack(&mp->link); - link_Stack(&mp->link, &protolayer); - link_Stack(&mp->link, &ccplayer); - link_Stack(&mp->link, &vjlayer); -#ifndef NONAT - link_Stack(&mp->link, &natlayer); -#endif -} - -int -mp_Up(struct mp *mp, struct datalink *dl) -{ - struct lcp *lcp = &dl->physical->link.lcp; - - if (mp->active) { - /* We're adding a link - do a last validation on our parameters */ - if (!peerid_Equal(&dl->peer, &mp->peer)) { - log_Printf(LogPHASE, "%s: Inappropriate peer !\n", dl->name); - log_Printf(LogPHASE, " Attached to peer %s/%s\n", mp->peer.authname, - mp_Enddisc(mp->peer.enddisc.class, mp->peer.enddisc.address, - mp->peer.enddisc.len)); - log_Printf(LogPHASE, " New link is peer %s/%s\n", dl->peer.authname, - mp_Enddisc(dl->peer.enddisc.class, dl->peer.enddisc.address, - dl->peer.enddisc.len)); - return MP_FAILED; - } - if (mp->local_mrru != lcp->want_mrru || - mp->peer_mrru != lcp->his_mrru || - mp->local_is12bit != lcp->want_shortseq || - mp->peer_is12bit != lcp->his_shortseq) { - log_Printf(LogPHASE, "%s: Invalid MRRU/SHORTSEQ MP parameters !\n", - dl->name); - return MP_FAILED; - } - return MP_ADDED; - } else { - /* First link in multilink mode */ - - mp->local_mrru = lcp->want_mrru; - mp->peer_mrru = lcp->his_mrru; - mp->local_is12bit = lcp->want_shortseq; - mp->peer_is12bit = lcp->his_shortseq; - mp->peer = dl->peer; - - throughput_destroy(&mp->link.stats.total); - throughput_init(&mp->link.stats.total, mp->cfg.autoload.period); - throughput_callback(&mp->link.stats.total, mp_UpDown, mp); - memset(mp->link.Queue, '\0', sizeof mp->link.Queue); - memset(mp->link.proto_in, '\0', sizeof mp->link.proto_in); - memset(mp->link.proto_out, '\0', sizeof mp->link.proto_out); - - /* Tell the link who it belongs to */ - dl->physical->link.stats.parent = &mp->link.stats.total; - - mp->out.seq = 0; - mp->out.link = 0; - mp->out.af = AF_INET; - mp->seq.min_in = 0; - mp->seq.next_in = 0; - - /* - * Now we create our server socket. - * If it already exists, join it. Otherwise, create and own it - */ - switch (mpserver_Open(&mp->server, &mp->peer)) { - case MPSERVER_CONNECTED: - log_Printf(LogPHASE, "mp: Transfer link on %s\n", - mp->server.socket.sun_path); - mp->server.send.dl = dl; /* Defer 'till it's safe to send */ - return MP_LINKSENT; - case MPSERVER_FAILED: - return MP_FAILED; - case MPSERVER_LISTENING: - log_Printf(LogPHASE, "mp: Listening on %s\n", mp->server.socket.sun_path); - log_Printf(LogPHASE, " First link: %s\n", dl->name); - - /* Re-point our NCP layers at our MP link */ - ncp_SetLink(&mp->bundle->ncp, &mp->link); - - /* Our lcp's already up 'cos of the NULL parent */ - if (ccp_SetOpenMode(&mp->link.ccp)) { - fsm_Up(&mp->link.ccp.fsm); - fsm_Open(&mp->link.ccp.fsm); - } - - mp->active = 1; - break; - } - } - - return MP_UP; -} - -void -mp_Down(struct mp *mp) -{ - if (mp->active) { - struct mbuf *next; - - /* Stop that ! */ - mp_StopAutoloadTimer(mp); - - /* Don't want any more of these */ - mpserver_Close(&mp->server); - - /* CCP goes down with a bang */ - fsm2initial(&mp->link.ccp.fsm); - - /* Received fragments go in the bit-bucket */ - while (mp->inbufs) { - next = mp->inbufs->m_nextpkt; - m_freem(mp->inbufs); - mp->inbufs = next; - } - - peerid_Init(&mp->peer); - mp->active = 0; - } -} - -void -mp_linkInit(struct mp_link *mplink) -{ - mplink->seq = 0; - mplink->bandwidth = 0; -} - -static void -mp_Assemble(struct mp *mp, struct mbuf *m, struct physical *p) -{ - struct mp_header mh, h; - struct mbuf *q, *last; - u_int32_t seq; - - /* - * When `m' and `p' are NULL, it means our oldest link has gone down. - * We want to determine a new min, and process any intermediate stuff - * as normal - */ - - if (m && mp_ReadHeader(mp, m, &mh) == 0) { - m_freem(m); - return; - } - - if (p) { - seq = p->dl->mp.seq; - p->dl->mp.seq = mh.seq; - } else - seq = mp->seq.min_in; - - if (mp->seq.min_in == seq) { - /* - * We've received new data on the link that has our min (oldest) seq. - * Figure out which link now has the smallest (oldest) seq. - */ - struct datalink *dl; - - mp->seq.min_in = (u_int32_t)-1; - for (dl = mp->bundle->links; dl; dl = dl->next) - if (dl->state == DATALINK_OPEN && - (mp->seq.min_in == (u_int32_t)-1 || - isbefore(mp->local_is12bit, dl->mp.seq, mp->seq.min_in))) - mp->seq.min_in = dl->mp.seq; - } - - /* - * Now process as many of our fragments as we can, adding our new - * fragment in as we go, and ordering with the oldest at the top of - * the queue. - */ - - last = NULL; - seq = mp->seq.next_in; - q = mp->inbufs; - while (q || m) { - if (!q) { - if (last) - last->m_nextpkt = m; - else - mp->inbufs = m; - q = m; - m = NULL; - h = mh; - } else { - mp_ReadHeader(mp, q, &h); - - if (m && isbefore(mp->local_is12bit, mh.seq, h.seq)) { - /* Our received fragment fits in before this one, so link it in */ - if (last) - last->m_nextpkt = m; - else - mp->inbufs = m; - m->m_nextpkt = q; - q = m; - h = mh; - m = NULL; - } - } - - if (h.seq != seq) { - /* we're missing something :-( */ - if (isbefore(mp->local_is12bit, seq, mp->seq.min_in)) { - /* we're never gonna get it */ - struct mbuf *next; - - /* Zap all older fragments */ - while (mp->inbufs != q) { - log_Printf(LogDEBUG, "Drop frag\n"); - next = mp->inbufs->m_nextpkt; - m_freem(mp->inbufs); - mp->inbufs = next; - } - - /* - * Zap everything until the next `end' fragment OR just before - * the next `begin' fragment OR 'till seq.min_in - whichever - * comes first. - */ - do { - mp_ReadHeader(mp, mp->inbufs, &h); - if (h.begin) { - /* We might be able to process this ! */ - h.seq--; /* We're gonna look for fragment with h.seq+1 */ - break; - } - next = mp->inbufs->m_nextpkt; - log_Printf(LogDEBUG, "Drop frag %u\n", h.seq); - m_freem(mp->inbufs); - mp->inbufs = next; - } while (mp->inbufs && (isbefore(mp->local_is12bit, mp->seq.min_in, - h.seq) || h.end)); - - /* - * Continue processing things from here. - * This deals with the possibility that we received a fragment - * on the slowest link that invalidates some of our data (because - * of the hole at `q'), but where there are subsequent `whole' - * packets that have already been received. - */ - - mp->seq.next_in = seq = inc_seq(mp->local_is12bit, h.seq); - last = NULL; - q = mp->inbufs; - } else - /* we may still receive the missing fragment */ - break; - } else if (h.end) { - /* We've got something, reassemble */ - struct mbuf **frag = &q; - int len; - long long first = -1; - - do { - *frag = mp->inbufs; - mp->inbufs = mp->inbufs->m_nextpkt; - len = mp_ReadHeader(mp, *frag, &h); - if (first == -1) - first = h.seq; - if (frag == &q && !h.begin) { - log_Printf(LogWARN, "Oops - MP frag %lu should have a begin flag\n", - (u_long)h.seq); - m_freem(q); - q = NULL; - } else if (frag != &q && h.begin) { - log_Printf(LogWARN, "Oops - MP frag %lu should have an end flag\n", - (u_long)h.seq - 1); - /* - * Stuff our fragment back at the front of the queue and zap - * our half-assembled packet. - */ - (*frag)->m_nextpkt = mp->inbufs; - mp->inbufs = *frag; - *frag = NULL; - m_freem(q); - q = NULL; - frag = &q; - h.end = 0; /* just in case it's a whole packet */ - } else { - (*frag)->m_offset += len; - (*frag)->m_len -= len; - (*frag)->m_nextpkt = NULL; - do - frag = &(*frag)->m_next; - while (*frag != NULL); - } - } while (!h.end); - - if (q) { - q = m_pullup(q); - log_Printf(LogDEBUG, "MP: Reassembled frags %lu-%lu, length %zd\n", - (u_long)first, (u_long)h.seq, m_length(q)); - link_PullPacket(&mp->link, MBUF_CTOP(q), q->m_len, mp->bundle); - m_freem(q); - } - - mp->seq.next_in = seq = inc_seq(mp->local_is12bit, h.seq); - last = NULL; - q = mp->inbufs; - } else { - /* Look for the next fragment */ - seq = inc_seq(mp->local_is12bit, seq); - last = q; - q = q->m_nextpkt; - } - } - - if (m) { - /* We still have to find a home for our new fragment */ - last = NULL; - for (q = mp->inbufs; q; last = q, q = q->m_nextpkt) { - mp_ReadHeader(mp, q, &h); - if (isbefore(mp->local_is12bit, mh.seq, h.seq)) - break; - } - /* Our received fragment fits in here */ - if (last) - last->m_nextpkt = m; - else - mp->inbufs = m; - m->m_nextpkt = q; - } -} - -struct mbuf * -mp_Input(struct bundle *bundle, struct link *l, struct mbuf *bp) -{ - struct physical *p = link2physical(l); - - if (!bundle->ncp.mp.active) - /* Let someone else deal with it ! */ - return bp; - - if (p == NULL) { - log_Printf(LogWARN, "DecodePacket: Can't do MP inside MP !\n"); - m_freem(bp); - } else { - m_settype(bp, MB_MPIN); - mp_Assemble(&bundle->ncp.mp, bp, p); - } - - return NULL; -} - -static void -mp_Output(struct mp *mp, struct bundle *bundle, struct link *l, - struct mbuf *m, u_int32_t begin, u_int32_t end) -{ - char prepend[4]; - - /* Stuff an MP header on the front of our packet and send it */ - - if (mp->peer_is12bit) { - u_int16_t val; - - val = (begin << 15) | (end << 14) | (u_int16_t)mp->out.seq; - ua_htons(&val, prepend); - m = m_prepend(m, prepend, 2, 0); - } else { - u_int32_t val; - - val = (begin << 31) | (end << 30) | (u_int32_t)mp->out.seq; - ua_htonl(&val, prepend); - m = m_prepend(m, prepend, 4, 0); - } - if (log_IsKept(LogDEBUG)) - log_Printf(LogDEBUG, "MP[frag %d]: Send %zd bytes on link `%s'\n", - mp->out.seq, m_length(m), l->name); - mp->out.seq = inc_seq(mp->peer_is12bit, mp->out.seq); - - if (l->ccp.fsm.state != ST_OPENED && ccp_Required(&l->ccp)) { - log_Printf(LogPHASE, "%s: Not transmitting... waiting for CCP\n", l->name); - return; - } - - link_PushPacket(l, m, bundle, LINK_QUEUES(l) - 1, PROTO_MP); -} - -int -mp_FillPhysicalQueues(struct bundle *bundle) -{ - struct mp *mp = &bundle->ncp.mp; - struct datalink *dl, *fdl; - size_t total, add, len; - int thislink, nlinks, nopenlinks, sendasip; - u_int32_t begin, end; - struct mbuf *m, *mo; - struct link *bestlink; - - thislink = nlinks = nopenlinks = 0; - for (fdl = NULL, dl = bundle->links; dl; dl = dl->next) { - /* Include non-open links here as mp->out.link will stay more correct */ - if (!fdl) { - if (thislink == mp->out.link) - fdl = dl; - else - thislink++; - } - nlinks++; - if (dl->state == DATALINK_OPEN) - nopenlinks++; - } - - if (!fdl) { - fdl = bundle->links; - if (!fdl) - return 0; - thislink = 0; - } - - total = 0; - for (dl = fdl; nlinks > 0; dl = dl->next, nlinks--, thislink++) { - if (!dl) { - dl = bundle->links; - thislink = 0; - } - - if (dl->state != DATALINK_OPEN) - continue; - - if (dl->physical->out) - /* this link has suffered a short write. Let it continue */ - continue; - - add = link_QueueLen(&dl->physical->link); - if (add) { - /* this link has got stuff already queued. Let it continue */ - total += add; - continue; - } - - if (!mp_QueueLen(mp)) { - int mrutoosmall; - - /* - * If there's only a single open link in our bundle and we haven't got - * MP level link compression, queue outbound traffic directly via that - * link's protocol stack rather than using the MP link. This results - * in the outbound traffic going out as PROTO_IP or PROTO_IPV6 rather - * than PROTO_MP. - */ - - mrutoosmall = 0; - sendasip = nopenlinks < 2; - if (sendasip) { - if (dl->physical->link.lcp.his_mru < mp->peer_mrru) { - /* - * Actually, forget it. This test is done against the MRRU rather - * than the packet size so that we don't end up sending some data - * in MP fragments and some data in PROTO_IP packets. That's just - * too likely to upset some ppp implementations. - */ - mrutoosmall = 1; - sendasip = 0; - } - } - - bestlink = sendasip ? &dl->physical->link : &mp->link; - if (!ncp_PushPacket(&bundle->ncp, &mp->out.af, bestlink)) - break; /* Nothing else to send */ - - if (mrutoosmall) - log_Printf(LogDEBUG, "Don't send data as PROTO_IP, MRU < MRRU\n"); - else if (sendasip) - log_Printf(LogDEBUG, "Sending data as PROTO_IP, not PROTO_MP\n"); - - if (sendasip) { - add = link_QueueLen(&dl->physical->link); - if (add) { - /* this link has got stuff already queued. Let it continue */ - total += add; - continue; - } - } - } - - m = link_Dequeue(&mp->link); - if (m) { - len = m_length(m); - begin = 1; - end = 0; - - while (!end) { - if (dl->state == DATALINK_OPEN) { - /* Write at most his_mru bytes to the physical link */ - if (len <= dl->physical->link.lcp.his_mru) { - mo = m; - end = 1; - m_settype(mo, MB_MPOUT); - } else { - /* It's > his_mru, chop the packet (`m') into bits */ - mo = m_get(dl->physical->link.lcp.his_mru, MB_MPOUT); - len -= mo->m_len; - m = mbuf_Read(m, MBUF_CTOP(mo), mo->m_len); - } - mp_Output(mp, bundle, &dl->physical->link, mo, begin, end); - begin = 0; - } - - if (!end) { - nlinks--; - dl = dl->next; - if (!dl) { - dl = bundle->links; - thislink = 0; - } else - thislink++; - } - } - } - } - mp->out.link = thislink; /* Start here next time */ - - return total; -} - -int -mp_SetDatalinkBandwidth(struct cmdargs const *arg) -{ - int val; - - if (arg->argc != arg->argn+1) - return -1; - - val = atoi(arg->argv[arg->argn]); - if (val <= 0) { - log_Printf(LogWARN, "The link bandwidth must be greater than zero\n"); - return 1; - } - arg->cx->mp.bandwidth = val; - - if (arg->cx->state == DATALINK_OPEN) - bundle_CalculateBandwidth(arg->bundle); - - return 0; -} - -int -mp_ShowStatus(struct cmdargs const *arg) -{ - struct mp *mp = &arg->bundle->ncp.mp; - - prompt_Printf(arg->prompt, "Multilink is %sactive\n", mp->active ? "" : "in"); - if (mp->active) { - struct mbuf *m, *lm; - int bufs = 0; - - lm = NULL; - prompt_Printf(arg->prompt, "Socket: %s\n", - mp->server.socket.sun_path); - for (m = mp->inbufs; m; m = m->m_nextpkt) { - bufs++; - lm = m; - } - prompt_Printf(arg->prompt, "Pending frags: %d", bufs); - if (bufs) { - struct mp_header mh; - unsigned long first, last; - - first = mp_ReadHeader(mp, mp->inbufs, &mh) ? mh.seq : 0; - last = mp_ReadHeader(mp, lm, &mh) ? mh.seq : 0; - prompt_Printf(arg->prompt, " (Have %lu - %lu, want %lu, lowest %lu)\n", - first, last, (unsigned long)mp->seq.next_in, - (unsigned long)mp->seq.min_in); - prompt_Printf(arg->prompt, " First has %sbegin bit and " - "%send bit", mh.begin ? "" : "no ", mh.end ? "" : "no "); - } - prompt_Printf(arg->prompt, "\n"); - } - - prompt_Printf(arg->prompt, "\nMy Side:\n"); - if (mp->active) { - prompt_Printf(arg->prompt, " Output SEQ: %u\n", mp->out.seq); - prompt_Printf(arg->prompt, " MRRU: %u\n", mp->local_mrru); - prompt_Printf(arg->prompt, " Short Seq: %s\n", - mp->local_is12bit ? "on" : "off"); - } - prompt_Printf(arg->prompt, " Discriminator: %s\n", - mp_Enddisc(mp->cfg.enddisc.class, mp->cfg.enddisc.address, - mp->cfg.enddisc.len)); - - prompt_Printf(arg->prompt, "\nHis Side:\n"); - if (mp->active) { - prompt_Printf(arg->prompt, " Auth Name: %s\n", mp->peer.authname); - prompt_Printf(arg->prompt, " Input SEQ: %u\n", mp->seq.next_in); - prompt_Printf(arg->prompt, " MRRU: %u\n", mp->peer_mrru); - prompt_Printf(arg->prompt, " Short Seq: %s\n", - mp->peer_is12bit ? "on" : "off"); - } - prompt_Printf(arg->prompt, " Discriminator: %s\n", - mp_Enddisc(mp->peer.enddisc.class, mp->peer.enddisc.address, - mp->peer.enddisc.len)); - - prompt_Printf(arg->prompt, "\nDefaults:\n"); - - prompt_Printf(arg->prompt, " MRRU: "); - if (mp->cfg.mrru) - prompt_Printf(arg->prompt, "%d (multilink enabled)\n", mp->cfg.mrru); - else - prompt_Printf(arg->prompt, "disabled\n"); - prompt_Printf(arg->prompt, " Short Seq: %s\n", - command_ShowNegval(mp->cfg.shortseq)); - prompt_Printf(arg->prompt, " Discriminator: %s\n", - command_ShowNegval(mp->cfg.negenddisc)); - prompt_Printf(arg->prompt, " AutoLoad: min %d%%, max %d%%," - " period %d secs\n", mp->cfg.autoload.min, - mp->cfg.autoload.max, mp->cfg.autoload.period); - - return 0; -} - -const char * -mp_Enddisc(u_char c, const char *address, size_t len) -{ - static char result[100]; /* Used immediately after it's returned */ - unsigned f, header; - - switch (c) { - case ENDDISC_NULL: - sprintf(result, "Null Class"); - break; - - case ENDDISC_LOCAL: - snprintf(result, sizeof result, "Local Addr: %.*s", (int)len, - address); - break; - - case ENDDISC_IP: - if (len == 4) - snprintf(result, sizeof result, "IP %s", - inet_ntoa(*(const struct in_addr *)address)); - else - sprintf(result, "IP[%zd] ???", len); - break; - - case ENDDISC_MAC: - if (len == 6) { - const u_char *m = (const u_char *)address; - snprintf(result, sizeof result, "MAC %02x:%02x:%02x:%02x:%02x:%02x", - m[0], m[1], m[2], m[3], m[4], m[5]); - } else - sprintf(result, "MAC[%zd] ???", len); - break; - - case ENDDISC_MAGIC: - sprintf(result, "Magic: 0x"); - header = strlen(result); - if (len + header + 1 > sizeof result) - len = sizeof result - header - 1; - for (f = 0; f < len; f++) - sprintf(result + header + 2 * f, "%02x", address[f]); - break; - - case ENDDISC_PSN: - snprintf(result, sizeof result, "PSN: %.*s", (int)len, address); - break; - - default: - sprintf(result, "%d: ", (int)c); - header = strlen(result); - if (len + header + 1 > sizeof result) - len = sizeof result - header - 1; - for (f = 0; f < len; f++) - sprintf(result + header + 2 * f, "%02x", address[f]); - break; - } - return result; -} - -int -mp_SetEnddisc(struct cmdargs const *arg) -{ - struct mp *mp = &arg->bundle->ncp.mp; - struct in_addr addr; - - switch (bundle_Phase(arg->bundle)) { - case PHASE_DEAD: - break; - case PHASE_ESTABLISH: - /* Make sure none of our links are DATALINK_LCP or greater */ - if (bundle_HighestState(arg->bundle) >= DATALINK_LCP) { - log_Printf(LogWARN, "enddisc: Only changable before" - " LCP negotiations\n"); - return 1; - } - break; - default: - log_Printf(LogWARN, "enddisc: Only changable at phase DEAD/ESTABLISH\n"); - return 1; - } - - if (arg->argc == arg->argn) { - mp->cfg.enddisc.class = 0; - *mp->cfg.enddisc.address = '\0'; - mp->cfg.enddisc.len = 0; - } else if (arg->argc > arg->argn) { - if (!strcasecmp(arg->argv[arg->argn], "label")) { - mp->cfg.enddisc.class = ENDDISC_LOCAL; - strcpy(mp->cfg.enddisc.address, arg->bundle->cfg.label); - mp->cfg.enddisc.len = strlen(mp->cfg.enddisc.address); - } else if (!strcasecmp(arg->argv[arg->argn], "ip")) { - if (arg->bundle->ncp.ipcp.my_ip.s_addr == INADDR_ANY) - ncprange_getip4addr(&arg->bundle->ncp.ipcp.cfg.my_range, &addr); - else - addr = arg->bundle->ncp.ipcp.my_ip; - memcpy(mp->cfg.enddisc.address, &addr.s_addr, sizeof addr.s_addr); - mp->cfg.enddisc.class = ENDDISC_IP; - mp->cfg.enddisc.len = sizeof arg->bundle->ncp.ipcp.my_ip.s_addr; - } else if (!strcasecmp(arg->argv[arg->argn], "mac")) { - struct sockaddr_dl hwaddr; - - if (arg->bundle->ncp.ipcp.my_ip.s_addr == INADDR_ANY) - ncprange_getip4addr(&arg->bundle->ncp.ipcp.cfg.my_range, &addr); - else - addr = arg->bundle->ncp.ipcp.my_ip; - - if (arp_EtherAddr(addr, &hwaddr, 1)) { - mp->cfg.enddisc.class = ENDDISC_MAC; - memcpy(mp->cfg.enddisc.address, hwaddr.sdl_data + hwaddr.sdl_nlen, - hwaddr.sdl_alen); - mp->cfg.enddisc.len = hwaddr.sdl_alen; - } else { - log_Printf(LogWARN, "set enddisc: Can't locate MAC address for %s\n", - inet_ntoa(addr)); - return 4; - } - } else if (!strcasecmp(arg->argv[arg->argn], "magic")) { - int f; - - randinit(); - for (f = 0; f < 20; f += sizeof(long)) - *(long *)(mp->cfg.enddisc.address + f) = random(); - mp->cfg.enddisc.class = ENDDISC_MAGIC; - mp->cfg.enddisc.len = 20; - } else if (!strcasecmp(arg->argv[arg->argn], "psn")) { - if (arg->argc > arg->argn+1) { - mp->cfg.enddisc.class = ENDDISC_PSN; - strcpy(mp->cfg.enddisc.address, arg->argv[arg->argn+1]); - mp->cfg.enddisc.len = strlen(mp->cfg.enddisc.address); - } else { - log_Printf(LogWARN, "PSN endpoint requires additional data\n"); - return 5; - } - } else { - log_Printf(LogWARN, "%s: Unrecognised endpoint type\n", - arg->argv[arg->argn]); - return 6; - } - } - - return 0; -} - -static int -mpserver_UpdateSet(struct fdescriptor *d, fd_set *r, fd_set *w, fd_set *e, - int *n) -{ - struct mpserver *s = descriptor2mpserver(d); - int result; - - result = 0; - if (s->send.dl != NULL) { - /* We've connect()ed */ - if (!link_QueueLen(&s->send.dl->physical->link) && - !s->send.dl->physical->out) { - /* Only send if we've transmitted all our data (i.e. the ConfigAck) */ - result -= datalink_RemoveFromSet(s->send.dl, r, w, e); - bundle_SendDatalink(s->send.dl, s->fd, &s->socket); - s->send.dl = NULL; - s->fd = -1; - } else - /* Never read from a datalink that's on death row ! */ - result -= datalink_RemoveFromSet(s->send.dl, r, NULL, NULL); - } else if (r && s->fd >= 0) { - if (*n < s->fd + 1) - *n = s->fd + 1; - FD_SET(s->fd, r); - log_Printf(LogTIMER, "mp: fdset(r) %d\n", s->fd); - result++; - } - return result; -} - -static int -mpserver_IsSet(struct fdescriptor *d, const fd_set *fdset) -{ - struct mpserver *s = descriptor2mpserver(d); - return s->fd >= 0 && FD_ISSET(s->fd, fdset); -} - -static void -mpserver_Read(struct fdescriptor *d, struct bundle *bundle, - const fd_set *fdset __unused) -{ - struct mpserver *s = descriptor2mpserver(d); - - bundle_ReceiveDatalink(bundle, s->fd); -} - -static int -mpserver_Write(struct fdescriptor *d __unused, struct bundle *bundle __unused, - const fd_set *fdset __unused) -{ - /* We never want to write here ! */ - log_Printf(LogALERT, "mpserver_Write: Internal error: Bad call !\n"); - return 0; -} - -void -mpserver_Init(struct mpserver *s) -{ - s->desc.type = MPSERVER_DESCRIPTOR; - s->desc.UpdateSet = mpserver_UpdateSet; - s->desc.IsSet = mpserver_IsSet; - s->desc.Read = mpserver_Read; - s->desc.Write = mpserver_Write; - s->send.dl = NULL; - s->fd = -1; - memset(&s->socket, '\0', sizeof s->socket); -} - -int -mpserver_Open(struct mpserver *s, struct peerid *peer) -{ - int f, l; - mode_t mask; - - if (s->fd != -1) { - log_Printf(LogALERT, "Internal error ! mpserver already open\n"); - mpserver_Close(s); - } - - l = snprintf(s->socket.sun_path, sizeof s->socket.sun_path, "%sppp-%s-%02x-", - _PATH_VARRUN, peer->authname, peer->enddisc.class); - if (l < 0) { - log_Printf(LogERROR, "mpserver: snprintf(): %s\n", strerror(errno)); - return MPSERVER_FAILED; - } - - for (f = 0; - f < peer->enddisc.len && (size_t)l < sizeof s->socket.sun_path - 2; - f++) { - snprintf(s->socket.sun_path + l, sizeof s->socket.sun_path - l, - "%02x", *(u_char *)(peer->enddisc.address+f)); - l += 2; - } - - s->socket.sun_family = AF_LOCAL; - s->socket.sun_len = sizeof s->socket; - s->fd = ID0socket(PF_LOCAL, SOCK_DGRAM, 0); - if (s->fd < 0) { - log_Printf(LogERROR, "mpserver: socket(): %s\n", strerror(errno)); - return MPSERVER_FAILED; - } - - setsockopt(s->fd, SOL_SOCKET, SO_REUSEADDR, (struct sockaddr *)&s->socket, - sizeof s->socket); - mask = umask(0177); - - /* - * Try to bind the socket. If we succeed we play server, if we fail - * we connect() and hand the link off. - */ - - if (ID0bind_un(s->fd, &s->socket) < 0) { - if (errno != EADDRINUSE) { - log_Printf(LogPHASE, "mpserver: can't create bundle socket %s (%s)\n", - s->socket.sun_path, strerror(errno)); - umask(mask); - close(s->fd); - s->fd = -1; - return MPSERVER_FAILED; - } - - /* So we're the sender */ - umask(mask); - if (ID0connect_un(s->fd, &s->socket) < 0) { - log_Printf(LogPHASE, "mpserver: can't connect to bundle socket %s (%s)\n", - s->socket.sun_path, strerror(errno)); - if (errno == ECONNREFUSED) - log_Printf(LogPHASE, " The previous server died badly !\n"); - close(s->fd); - s->fd = -1; - return MPSERVER_FAILED; - } - - /* Donate our link to the other guy */ - return MPSERVER_CONNECTED; - } - - return MPSERVER_LISTENING; -} - -void -mpserver_Close(struct mpserver *s) -{ - if (s->send.dl != NULL) { - bundle_SendDatalink(s->send.dl, s->fd, &s->socket); - s->send.dl = NULL; - s->fd = -1; - } else if (s->fd >= 0) { - close(s->fd); - if (ID0unlink(s->socket.sun_path) == -1) - log_Printf(LogERROR, "%s: Failed to remove: %s\n", s->socket.sun_path, - strerror(errno)); - memset(&s->socket, '\0', sizeof s->socket); - s->fd = -1; - } -} - -void -mp_LinkLost(struct mp *mp, struct datalink *dl) -{ - if (mp->seq.min_in == dl->mp.seq) - /* We've lost the link that's holding everything up ! */ - mp_Assemble(mp, NULL, NULL); -} - -size_t -mp_QueueLen(struct mp *mp) -{ - return link_QueueLen(&mp->link); -} |
