projects / l2tpns.git / blobdiff
? search:
summary | shortlog | log | commit | commitdiff | tree
raw | inline | side by side
Fix Warning: dereferencing type-punned pointer will break strict...
[l2tpns.git] / ppp.c
diff --git a/ppp.c b/ppp.c
index 5ed8563..893ceb9 100644 (file)
--- a/ppp.c
+++ b/ppp.c
@@ -1204,24 +1204,24 @@ static void setepdis(epdist *ep1, epdist ep2)
 
 static bundleidt new_bundle()
 {
 
 static bundleidt new_bundle()
 {
-        bundleidt i;
-        for (i = 1; i < MAXBUNDLE; i++)
-        {
-                if (bundle[i].state == BUNDLEFREE)
-                {
-                        LOG(4, 0, 0, "MPPP: Assigning bundle ID %d\n", i);
-                        bundle[i].num_of_links = 1;
-                        bundle[i].last_check = time_now;        // Initialize last_check value
-                        bundle[i].state = BUNDLEOPEN;
-                        bundle[i].current_ses = -1;     // This is to enforce the first session 0 to be used at first
+       bundleidt i;
+       for (i = 1; i < MAXBUNDLE; i++)
+       {
+               if (bundle[i].state == BUNDLEFREE)
+               {
+                       LOG(4, 0, 0, "MPPP: Assigning bundle ID %d\n", i);
+                       bundle[i].num_of_links = 1;
+                       bundle[i].last_check = time_now;        // Initialize last_check value
+                       bundle[i].state = BUNDLEOPEN;
+                       bundle[i].current_ses = -1;     // This is to enforce the first session 0 to be used at first
                        memset(&frag[i], 0, sizeof(fragmentationt));
                        memset(&frag[i], 0, sizeof(fragmentationt));
-                        if (i > config->cluster_highest_bundleid)
-                                config->cluster_highest_bundleid = i;
-                        return i;
-                }
-        }
-        LOG(0, 0, 0, "MPPP: Can't find a free bundle! There shouldn't be this many in use!\n");
-        return 0;
+                       if (i > config->cluster_highest_bundleid)
+                                       config->cluster_highest_bundleid = i;
+                       return i;
+               }
+       }
+       LOG(0, 0, 0, "MPPP: Can't find a free bundle! There shouldn't be this many in use!\n");
+       return 0;
 }
 
 static void ipcp_open(sessionidt s, tunnelidt t)
 }
 
 static void ipcp_open(sessionidt s, tunnelidt t)
@@ -1769,7 +1769,7 @@ void processipin(sessionidt s, tunnelidt t, uint8_t *p, uint16_t l)
        if (!session[s].bundle || bundle[session[s].bundle].num_of_links < 2) // FIXME: 
        {
                // no spoof (do sessionbyip to handled statically routed subnets)
        if (!session[s].bundle || bundle[session[s].bundle].num_of_links < 2) // FIXME: 
        {
                // no spoof (do sessionbyip to handled statically routed subnets)
-               if (ip != session[s].ip && sessionbyip(htonl(ip)) != s)
+               if (!config->disable_no_spoof && ip != session[s].ip && sessionbyip(htonl(ip)) != s)
                {
                        LOG(4, s, t, "Dropping packet with spoofed IP %s\n", fmtaddr(htonl(ip), 0));
                        return;
                {
                        LOG(4, s, t, "Dropping packet with spoofed IP %s\n", fmtaddr(htonl(ip), 0));
                        return;
@@ -1934,7 +1934,7 @@ void processmpin(sessionidt s, tunnelidt t, uint8_t *p, uint16_t l)
        {
                // There have a long break of the link !!!!!!!!
                // M_offset is bigger that the fragmentation buffer size
        {
                // There have a long break of the link !!!!!!!!
                // M_offset is bigger that the fragmentation buffer size
-               LOG(3, s, t, "MPPP: M_offset out of range, min:%d, begin_seq:%d, jitteravg:%d\n", Mmin, this_fragmentation->start_seq, sess_local[s].jitteravg);
+               LOG(3, s, t, "MPPP: M_offset out of range, min:%d, begin_seq:%d\n", Mmin, this_fragmentation->start_seq);
 
                // Calculate the new start index, the previous frag are lost
                begin_index = (M_offset + this_fragmentation->start_index) & MAXFRAGNUM_MASK;
 
                // Calculate the new start index, the previous frag are lost
                begin_index = (M_offset + this_fragmentation->start_index) & MAXFRAGNUM_MASK;
@@ -1951,7 +1951,7 @@ void processmpin(sessionidt s, tunnelidt t, uint8_t *p, uint16_t l)
        if (frag_offset < 0)
        {
                // this packet comes before the next
        if (frag_offset < 0)
        {
                // this packet comes before the next
-               LOG(3, s, t, "MPPP: packet comes before the next, seq:%d, begin_seq:%d, size frag:%d\n", seq_num, this_fragmentation->start_seq, l);
+               LOG(3, s, t, "MPPP: (COMES BEFORE) the next, seq:%d, begin_seq:%d, size_frag:%d, flags:%02X is LOST\n", seq_num, this_fragmentation->start_seq, l, flags);
                return;
        }
 
                return;
        }
 
@@ -1959,7 +1959,7 @@ void processmpin(sessionidt s, tunnelidt t, uint8_t *p, uint16_t l)
        if (frag_offset >= MAXFRAGNUM)
        {
                // frag_offset is bigger that the fragmentation buffer size
        if (frag_offset >= MAXFRAGNUM)
        {
                // frag_offset is bigger that the fragmentation buffer size
-               LOG(3, s, t, "MPPP: Index out of range, seq:%d, begin_seq:%d, jitteravg:%d\n", seq_num, this_fragmentation->start_seq, sess_local[s].jitteravg);
+               LOG(3, s, t, "MPPP: Index out of range, seq:%d, begin_seq:%d\n", seq_num, this_fragmentation->start_seq);
                return;
        }
 
                return;
        }
 
@@ -1971,8 +1971,8 @@ void processmpin(sessionidt s, tunnelidt t, uint8_t *p, uint16_t l)
 
        if (this_frag->length > 0)
                // This fragment is lost, It was around the buffer and it was never completed the packet.
 
        if (this_frag->length > 0)
                // This fragment is lost, It was around the buffer and it was never completed the packet.
-               LOG(3, this_frag->sid, this_frag->tid, "MPPP: (INSERT) seq_num:%d frag_index:%d flags:%d jitteravg:%d is LOST\n",
-                       this_frag->seq, frag_index, this_frag->flags, this_frag->jitteravg);
+               LOG(3, this_frag->sid, this_frag->tid, "MPPP: (INSERT) seq_num:%d frag_index:%d flags:%02X is LOST\n",
+                       this_frag->seq, frag_index, this_frag->flags);
 
        this_frag->length = l;
        this_frag->sid = s;
 
        this_frag->length = l;
        this_frag->sid = s;
@@ -2001,9 +2001,9 @@ void processmpin(sessionidt s, tunnelidt t, uint8_t *p, uint16_t l)
                {
                        // This fragment is lost, It was around the buffer and it was never completed the packet.
                        LOG(3, this_fragmentation->fragment[frag_index_next].sid, this_fragmentation->fragment[frag_index_next].tid,
                {
                        // This fragment is lost, It was around the buffer and it was never completed the packet.
                        LOG(3, this_fragmentation->fragment[frag_index_next].sid, this_fragmentation->fragment[frag_index_next].tid,
-                               "MPPP: (NEXT) seq_num:%d frag_index:%d flags:%d jitteravg:%d is LOST\n",
+                               "MPPP: (NEXT) seq_num:%d frag_index:%d flags:%02X is LOST\n",
                                this_fragmentation->fragment[frag_index_next].seq, frag_index_next,
                                this_fragmentation->fragment[frag_index_next].seq, frag_index_next,
-                               this_fragmentation->fragment[frag_index_next].flags, this_fragmentation->fragment[frag_index_next].jitteravg);
+                               this_fragmentation->fragment[frag_index_next].flags);
                        // this frag is lost
                        this_fragmentation->fragment[frag_index_next].length = 0;
                        this_fragmentation->fragment[frag_index_next].flags = 0;
                        // this frag is lost
                        this_fragmentation->fragment[frag_index_next].length = 0;
                        this_fragmentation->fragment[frag_index_next].flags = 0;
@@ -2020,9 +2020,9 @@ void processmpin(sessionidt s, tunnelidt t, uint8_t *p, uint16_t l)
                {
                        // This fragment is lost, It was around the buffer and it was never completed the packet.
                        LOG(3, this_fragmentation->fragment[frag_index_prev].sid, this_fragmentation->fragment[frag_index_prev].tid,
                {
                        // This fragment is lost, It was around the buffer and it was never completed the packet.
                        LOG(3, this_fragmentation->fragment[frag_index_prev].sid, this_fragmentation->fragment[frag_index_prev].tid,
-                               "MPPP: (PREV) seq_num:%d frag_index:%d flags:%d jitteravg:%d is LOST\n",
+                               "MPPP: (PREV) seq_num:%d frag_index:%d flags:%02X is LOST\n",
                                this_fragmentation->fragment[frag_index_prev].seq, frag_index_prev,
                                this_fragmentation->fragment[frag_index_prev].seq, frag_index_prev,
-                               this_fragmentation->fragment[frag_index_prev].flags, this_fragmentation->fragment[frag_index_prev].jitteravg);
+                               this_fragmentation->fragment[frag_index_prev].flags);
 
                        this_fragmentation->fragment[frag_index_prev].length = 0;
                        this_fragmentation->fragment[frag_index_prev].flags = 0;
 
                        this_fragmentation->fragment[frag_index_prev].length = 0;
                        this_fragmentation->fragment[frag_index_prev].flags = 0;
@@ -2066,9 +2066,9 @@ find_frame:
                                                        {
                                                                // This fragment is lost, it was never completed the packet.
                                                                LOG(3, this_fragmentation->fragment[end_index].sid, this_fragmentation->fragment[end_index].tid,
                                                        {
                                                                // This fragment is lost, it was never completed the packet.
                                                                LOG(3, this_fragmentation->fragment[end_index].sid, this_fragmentation->fragment[end_index].tid,
-                                                                       "MPPP: (FIND END) seq_num:%d frag_index:%d flags:%d jitteravg:%d is LOST\n",
+                                                                       "MPPP: (FIND END) seq_num:%d frag_index:%d flags:%02X is LOST\n",
                                                                        this_fragmentation->fragment[end_index].seq, begin_index,
                                                                        this_fragmentation->fragment[end_index].seq, begin_index,
-                                                                       this_fragmentation->fragment[end_index].flags, this_fragmentation->fragment[end_index].jitteravg);
+                                                                       this_fragmentation->fragment[end_index].flags);
                                                                // this frag is lost
                                                                this_fragmentation->fragment[end_index].length = 0;
                                                                this_fragmentation->fragment[end_index].flags = 0;
                                                                // this frag is lost
                                                                this_fragmentation->fragment[end_index].length = 0;
                                                                this_fragmentation->fragment[end_index].flags = 0;
@@ -2097,9 +2097,9 @@ find_frame:
                        {
                                // This fragment is lost, it was never completed the packet.
                                LOG(3, this_fragmentation->fragment[begin_index].sid, this_fragmentation->fragment[begin_index].tid,
                        {
                                // This fragment is lost, it was never completed the packet.
                                LOG(3, this_fragmentation->fragment[begin_index].sid, this_fragmentation->fragment[begin_index].tid,
-                                       "MPPP: (FIND BEGIN) seq_num:%d frag_index:%d flags:%d jitteravg:%d is LOST\n",
+                                       "MPPP: (FIND BEGIN) seq_num:%d frag_index:%d flags:%02X is LOST\n",
                                        this_fragmentation->fragment[begin_index].seq, begin_index,
                                        this_fragmentation->fragment[begin_index].seq, begin_index,
-                                       this_fragmentation->fragment[begin_index].flags, this_fragmentation->fragment[begin_index].jitteravg);
+                                       this_fragmentation->fragment[begin_index].flags);
                                // this frag is lost
                                this_fragmentation->fragment[begin_index].length = 0;
                                this_fragmentation->fragment[begin_index].flags = 0;
                                // this frag is lost
                                this_fragmentation->fragment[begin_index].length = 0;
                                this_fragmentation->fragment[begin_index].flags = 0;
@@ -2117,6 +2117,10 @@ assembling_frame:
        {
                if (!(this_fragmentation->fragment[begin_index].flags & MP_BEGIN))
                {
        {
                if (!(this_fragmentation->fragment[begin_index].flags & MP_BEGIN))
                {
+                       LOG(3, this_fragmentation->fragment[begin_index].sid, this_fragmentation->fragment[begin_index].tid,
+                               "MPPP: (NOT BEGIN) seq_num:%d frag_index:%d flags:%02X\n",
+                               this_fragmentation->fragment[begin_index].seq, begin_index,
+                               this_fragmentation->fragment[begin_index].flags);
                        // should occur only after an "M_Offset out of range"
                        // The start sequence must be a begin sequence
                        this_fragmentation->start_index = (begin_index +1) & MAXFRAGNUM_MASK;
                        // should occur only after an "M_Offset out of range"
                        // The start sequence must be a begin sequence
                        this_fragmentation->start_index = (begin_index +1) & MAXFRAGNUM_MASK;
@@ -2195,9 +2199,9 @@ assembling_frame:
                (this_fragmentation->fragment[begin_index].seq != this_fragmentation->start_seq))
        {
                LOG(3, this_fragmentation->fragment[begin_index].sid, this_fragmentation->fragment[begin_index].tid,
                (this_fragmentation->fragment[begin_index].seq != this_fragmentation->start_seq))
        {
                LOG(3, this_fragmentation->fragment[begin_index].sid, this_fragmentation->fragment[begin_index].tid,
-                               "MPPP: (START) seq_num:%d frag_index:%d flags:%d jitteravg:%d is LOST\n",
+                               "MPPP: (START) seq_num:%d frag_index:%d flags:%02X is LOST\n",
                                this_fragmentation->fragment[begin_index].seq, begin_index,
                                this_fragmentation->fragment[begin_index].seq, begin_index,
-                               this_fragmentation->fragment[begin_index].flags, this_fragmentation->fragment[begin_index].jitteravg);
+                               this_fragmentation->fragment[begin_index].flags);
                        this_fragmentation->fragment[begin_index].length = 0;
                        this_fragmentation->fragment[begin_index].flags = 0;
        }
                        this_fragmentation->fragment[begin_index].length = 0;
                        this_fragmentation->fragment[begin_index].flags = 0;
        }
@@ -2607,6 +2611,85 @@ uint8_t *makeppp(uint8_t *b, int size, uint8_t *p, int l, sessionidt s, tunnelid
        return b;
 }
 
        return b;
 }
 
+// fill in a L2TP message with a PPP frame,
+// returns start of PPP frame
+//(note: THIS ROUTINE CAN WRITES TO p[-28]).
+uint8_t *opt_makeppp(uint8_t *p, int l, sessionidt s, tunnelidt t, uint16_t mtype, uint8_t prio, bundleidt bid, uint8_t mp_bits)
+{
+       uint16_t hdr = 0x0002; // L2TP with no options
+       uint16_t type = mtype;
+       uint8_t *b = p;
+
+       if (t == TUNNEL_ID_PPPOE)
+       {
+               return opt_pppoe_makeppp(p, l, s, t, mtype, prio, bid, mp_bits);
+       }
+
+       // Check whether this session is part of multilink
+       if (bid)
+       {
+               if (bundle[bid].num_of_links > 1)
+                       type = PPPMP; // Change PPP message type to the PPPMP
+               else
+                       bid = 0;
+       }
+
+       if (bid)
+       {
+               // Add the message type if this fragment has the begin bit set
+               if (mp_bits & MP_BEGIN)
+               {
+                       b -= 2;
+                       *(uint16_t *) b = htons(mtype); // Message type
+               }
+
+               // Set the sequence number and (B)egin (E)nd flags
+               if (session[s].mssf)
+               {
+                       // Set the multilink bits
+                       uint16_t bits_send = mp_bits;
+                       b -= 2;
+                       *(uint16_t *) b = htons((bundle[bid].seq_num_t & 0x0FFF)|bits_send);
+               }
+               else
+               {
+                       b -= 4;
+                       *(uint32_t *) b = htonl(bundle[bid].seq_num_t);
+                       // Set the multilink bits
+                       *b = mp_bits;
+               }
+
+               bundle[bid].seq_num_t++;
+       }
+
+       if (type < 0x100 && session[s].flags & SESSION_PFC)
+       {
+               b--;
+               *b = type;
+       }
+       else
+       {
+               b -= 2;
+               *(uint16_t *) b = htons(type);
+       }
+
+       if (type == PPPLCP || !(session[s].flags & SESSION_ACFC))
+       {
+               b -= 2;
+               *(uint16_t *) b = htons(0xFF03); // HDLC header
+       }
+
+       if (prio) hdr |= 0x0100; // set priority bit
+       b -= 2;
+       *(uint16_t *) b = htons(session[s].far); // session
+       b -= 2;
+       *(uint16_t *) b = htons(tunnel[t].far); // tunnel
+       b -= 2;
+       *(uint16_t *) b = htons(hdr);
+
+       return b;
+}
+
 static int add_lcp_auth(uint8_t *b, int size, int authtype)
 {
        int len = 0;
 static int add_lcp_auth(uint8_t *b, int size, int authtype)
 {
        int len = 0;
for cloning use: "git clone git://git.sameswireless.fr/l2tpns.git" ; For add to your sources.list: "deb http://package.sameswifi.fr/ jessie main"