]> git.saurik.com Git - apple/xnu.git/blobdiff - bsd/netinet/ip_divert.c
xnu-1504.15.3.tar.gz
[apple/xnu.git] / bsd / netinet / ip_divert.c
index 12d193d69f695552d7b7ba8ff0df5efb16070ed2..e3c771e6ddfa34dd73b0136021eae1177dcecbd6 100644 (file)
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2000-2007 Apple Inc. All rights reserved.
+ * Copyright (c) 2000-2010 Apple Inc. All rights reserved.
  *
  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
  * 
@@ -76,6 +76,7 @@
 #include <sys/systm.h>
 #include <sys/proc.h>
 
+#include <machine/endian.h>
 
 #include <net/if.h>
 #include <net/route.h>
 static struct inpcbhead divcb;
 static struct inpcbinfo divcbinfo;
 
-static u_long  div_sendspace = DIVSNDQ;        /* XXX sysctl ? */
-static u_long  div_recvspace = DIVRCVQ;        /* XXX sysctl ? */
+static u_int32_t       div_sendspace = DIVSNDQ;        /* XXX sysctl ? */
+static u_int32_t       div_recvspace = DIVRCVQ;        /* XXX sysctl ? */
 
 /* Optimization: have this preinitialized */
 static struct sockaddr_in divsrc = { sizeof(divsrc), AF_INET, 0, { 0 }, { 0,0,0,0,0,0,0,0 } };
@@ -190,7 +191,7 @@ div_init(void)
 void
 div_input(struct mbuf *m, __unused int off)
 {
-       OSAddAtomic(1, (SInt32*)&ipstat.ips_noproto);
+       OSAddAtomic(1, &ipstat.ips_noproto);
        m_freem(m);
 }
 
@@ -291,8 +292,8 @@ divert_packet(struct mbuf *m, int incoming, int port, int rule)
                socket_unlock(sa, 1);
        } else {
                m_freem(m);
-               OSAddAtomic(1, (SInt32*)&ipstat.ips_noproto);
-               OSAddAtomic(-1, (SInt32*)&ipstat.ips_delivered);
+               OSAddAtomic(1, &ipstat.ips_noproto);
+               OSAddAtomic(-1, &ipstat.ips_delivered);
         }
        lck_rw_done(divcbinfo.mtx);     
 }
@@ -313,10 +314,17 @@ div_output(struct socket *so, struct mbuf *m, struct sockaddr *addr,
        struct ip *const ip = mtod(m, struct ip *);
        struct sockaddr_in *sin = (struct sockaddr_in *)addr;
        int error = 0;
+#if PKT_PRIORITY
+       mbuf_traffic_class_t mtc = MBUF_TC_NONE;
+#endif /* PKT_PRIORITY */
 
-       if (control)
-               m_freem(control);               /* XXX */
+       if (control != NULL) {
+#if PKT_PRIORITY
+               mtc = mbuf_traffic_class_from_control(control);
+#endif /* PKT_PRIORITY */
 
+               m_freem(control);               /* XXX */
+       }
        /* Loopback avoidance and state recovery */
        if (sin) {
                struct m_tag *mtag;
@@ -351,6 +359,9 @@ div_output(struct socket *so, struct mbuf *m, struct sockaddr *addr,
 
        /* Reinject packet into the system as incoming or outgoing */
        if (!sin || sin->sin_addr.s_addr == 0) {
+               struct ip_out_args ipoa = { IFSCOPE_NONE };
+               struct route ro;
+
                /*
                 * Don't allow both user specified and setsockopt options,
                 * and don't allow packet length sizes that will crash
@@ -362,21 +373,32 @@ div_output(struct socket *so, struct mbuf *m, struct sockaddr *addr,
                }
 
                /* Convert fields to host order for ip_output() */
+#if BYTE_ORDER != BIG_ENDIAN
                NTOHS(ip->ip_len);
                NTOHS(ip->ip_off);
+#endif
+
+               OSAddAtomic(1, &ipstat.ips_rawout);
+               /* Copy the cached route and take an extra reference */
+               inp_route_copyout(inp, &ro);
+
+#if PKT_PRIORITY
+               set_traffic_class(m, so, mtc);
+#endif /* PKT_PRIORITY */
 
-               /* Send packet to output processing */
-               OSAddAtomic(1, (SInt32*)&ipstat.ips_rawout);
                socket_unlock(so, 0);
 #if CONFIG_MACF_NET
                mac_mbuf_label_associate_inpcb(inp, m);
 #endif
-               error = ip_output(m,
-                           inp->inp_options, &inp->inp_route,
+               /* Send packet to output processing */
+               error = ip_output(m, inp->inp_options, &ro,
                        (so->so_options & SO_DONTROUTE) |
-                       IP_ALLOWBROADCAST | IP_RAWOUTPUT,
-                       inp->inp_moptions, NULL);
+                       IP_ALLOWBROADCAST | IP_RAWOUTPUT | IP_OUTARGS,
+                       inp->inp_moptions, &ipoa);
+
                socket_lock(so, 0);
+               /* Synchronize cached PCB route */
+               inp_route_copyin(inp, &ro);
        } else {
                struct  ifaddr *ifa;
 
@@ -397,30 +419,6 @@ div_output(struct socket *so, struct mbuf *m, struct sockaddr *addr,
                        m->m_pkthdr.rcvif = ifa->ifa_ifp;
                        ifafree(ifa);
                }
-               
-               if ((~IF_HWASSIST_CSUM_FLAGS(m->m_pkthdr.rcvif->if_hwassist) & 
-                               m->m_pkthdr.csum_flags) == 0) {
-                       if (m->m_pkthdr.csum_flags & CSUM_DELAY_DATA) {
-                               m->m_pkthdr.csum_flags &= ~CSUM_DELAY_DATA;
-                       }
-                       m->m_pkthdr.csum_flags |=
-                               CSUM_DATA_VALID | CSUM_PSEUDO_HDR |
-                               CSUM_IP_CHECKED | CSUM_IP_VALID;
-                       m->m_pkthdr.csum_data = 0xffff;
-               }
-               else if (m->m_pkthdr.csum_flags & CSUM_DELAY_DATA) {
-                       int     hlen;
-                       
-#ifdef _IP_VHL
-                       hlen = IP_VHL_HL(ip->ip_vhl) << 2;
-#else
-                       hlen = ip->ip_hl << 2;
-#endif
-                       in_delayed_cksum(m);
-                       m->m_pkthdr.csum_flags &= ~CSUM_DELAY_DATA;
-                       ip->ip_sum = in_cksum(m, hlen);
-               }
-
 #if CONFIG_MACF_NET
                mac_mbuf_label_associate_socket(so, m);
 #endif
@@ -445,7 +443,7 @@ div_attach(struct socket *so, int proto, struct proc *p)
        inp  = sotoinpcb(so);
        if (inp)
                panic("div_attach");
-       if (p && (error = proc_suser(p)) != 0)
+       if ((error = proc_suser(p)) != 0)
                return error;
 
        error = soreserve(so, div_sendspace, div_recvspace);
@@ -538,7 +536,7 @@ div_send(struct socket *so, __unused int flags, struct mbuf *m, struct sockaddr
        /* Packet must have a header (but that's about it) */
        if (m->m_len < sizeof (struct ip) &&
            (m = m_pullup(m, sizeof (struct ip))) == 0) {
-               OSAddAtomic(1, (SInt32*)&ipstat.ips_toosmall);
+               OSAddAtomic(1, &ipstat.ips_toosmall);
                m_freem(m);
                return EINVAL;
        }
@@ -547,9 +545,11 @@ div_send(struct socket *so, __unused int flags, struct mbuf *m, struct sockaddr
        return div_output(so, m, nam, control);
 }
 
+#if 0
 static int
 div_pcblist SYSCTL_HANDLER_ARGS
 {
+#pragma unused(oidp, arg1, arg2)
        int error, i, n;
        struct inpcb *inp, **inp_list;
        inp_gen_t gencnt;
@@ -641,82 +641,90 @@ div_pcblist SYSCTL_HANDLER_ARGS
        lck_rw_done(divcbinfo.mtx);
        return error;
 }
+#endif
 
 __private_extern__ int
-div_lock(struct socket *so, int refcount, int lr)
- {
-       int lr_saved;
-       if (lr == 0) 
-               lr_saved = (unsigned int) __builtin_return_address(0);
-       else lr_saved = lr;
-       
+div_lock(struct socket *so, int refcount, void *lr)
+{
+       void *lr_saved;
+
+       if (lr == NULL)
+               lr_saved = __builtin_return_address(0);
+       else
+               lr_saved = lr;
+
 #ifdef MORE_DICVLOCK_DEBUG
-       printf("div_lock: so=%p sopcb=%p lock=%x ref=%x lr=%x\n",
-                       so, 
-                       so->so_pcb, 
-                       so->so_pcb ? ((struct inpcb *)so->so_pcb)->inpcb_mtx : 0, 
-                       so->so_usecount, 
-                       lr_saved);
+       printf("div_lock: so=%p sopcb=%p lock=%p ref=%x lr=%p\n",
+           so, so->so_pcb, so->so_pcb ?
+           ((struct inpcb *)so->so_pcb)->inpcb_mtx : NULL,
+           so->so_usecount, lr_saved);
 #endif
        if (so->so_pcb) {
                lck_mtx_lock(((struct inpcb *)so->so_pcb)->inpcb_mtx);
        } else  {
-               panic("div_lock: so=%p NO PCB! lr=%x\n", so, lr_saved);
-               lck_mtx_lock(so->so_proto->pr_domain->dom_mtx);
+               panic("div_lock: so=%p NO PCB! lr=%p lrh= lrh= %s\n", 
+                   so, lr_saved, solockhistory_nr(so));
+               /* NOTREACHED */
        }
-       
-       if (so->so_usecount < 0)
-               panic("div_lock: so=%p so_pcb=%p lr=%x ref=%x\n",
-               so, so->so_pcb, lr_saved, so->so_usecount);
-       
+
+       if (so->so_usecount < 0) {
+               panic("div_lock: so=%p so_pcb=%p lr=%p ref=%x lrh= %s\n",
+                   so, so->so_pcb, lr_saved, so->so_usecount,
+                   solockhistory_nr(so));
+               /* NOTREACHED */
+       }
+
        if (refcount)
                so->so_usecount++;
-       so->lock_lr[so->next_lock_lr] = (u_int32_t)lr_saved;
+       so->lock_lr[so->next_lock_lr] = lr_saved;
        so->next_lock_lr = (so->next_lock_lr+1) % SO_LCKDBG_MAX;
 
        return (0);
 }
 
 __private_extern__ int
-div_unlock(struct socket *so, int refcount, int lr)
+div_unlock(struct socket *so, int refcount, void *lr)
 {
-       int lr_saved;
+       void *lr_saved;
        lck_mtx_t * mutex_held;
-       struct inpcb *inp = sotoinpcb(so);      
+       struct inpcb *inp = sotoinpcb(so);
 
-       if (lr == 0) 
-               lr_saved = (unsigned int) __builtin_return_address(0);
-       else lr_saved = lr;
+       if (lr == NULL)
+               lr_saved = __builtin_return_address(0);
+       else
+               lr_saved = lr;
 
-       
 #ifdef MORE_DICVLOCK_DEBUG
-       printf("div_unlock: so=%p sopcb=%p lock=%x ref=%x lr=%x\n",
-                       so, 
-                       so->so_pcb, 
-                       so->so_pcb ? ((struct inpcb *)so->so_pcb)->inpcb_mtx : 0, 
-                       so->so_usecount, 
-                       lr_saved);
+       printf("div_unlock: so=%p sopcb=%p lock=%p ref=%x lr=%p\n",
+           so, so->so_pcb, so->so_pcb ?
+           ((struct inpcb *)so->so_pcb)->inpcb_mtx : NULL,
+           so->so_usecount, lr_saved);
 #endif
        if (refcount)
                so->so_usecount--;
-       
-       if (so->so_usecount < 0)
-               panic("div_unlock: so=%p usecount=%x\n", so, so->so_usecount);
+
+       if (so->so_usecount < 0) {
+               panic("div_unlock: so=%p usecount=%x lrh= %s\n", 
+                   so, so->so_usecount, solockhistory_nr(so));
+               /* NOTREACHED */
+       }
        if (so->so_pcb == NULL) {
-               panic("div_unlock: so=%p NO PCB usecount=%x lr=%x\n", so, so->so_usecount, lr_saved);
-               mutex_held = so->so_proto->pr_domain->dom_mtx;
-       } else {
-               mutex_held = ((struct inpcb *)so->so_pcb)->inpcb_mtx;
+               panic("div_unlock: so=%p NO PCB usecount=%x lr=%p lrh= %s\n",
+                   so, so->so_usecount, lr_saved, solockhistory_nr(so));
+               /* NOTREACHED */
        }
+       mutex_held = ((struct inpcb *)so->so_pcb)->inpcb_mtx;
 
        if (so->so_usecount == 0 && (inp->inp_wantcnt == WNT_STOPUSING)) {
                lck_rw_lock_exclusive(divcbinfo.mtx);
+               if (inp->inp_state != INPCB_STATE_DEAD)
+                       in_pcbdetach(inp);
                in_pcbdispose(inp);
                lck_rw_done(divcbinfo.mtx);
                return (0);
        }
        lck_mtx_assert(mutex_held, LCK_MTX_ASSERT_OWNED);
-       so->unlock_lr[so->next_unlock_lr] = (u_int32_t) lr_saved;
+       so->unlock_lr[so->next_unlock_lr] = lr_saved;
        so->next_unlock_lr = (so->next_unlock_lr+1) % SO_LCKDBG_MAX;
        lck_mtx_unlock(mutex_held);
        return (0);
@@ -729,10 +737,12 @@ div_getlock(struct socket *so, __unused int locktype)
        
        if (so->so_pcb)  {
                if (so->so_usecount < 0)
-                       panic("div_getlock: so=%p usecount=%x\n", so, so->so_usecount);
+                       panic("div_getlock: so=%p usecount=%x lrh= %s\n", 
+                           so, so->so_usecount, solockhistory_nr(so));
                return(inpcb->inpcb_mtx);
        } else {
-               panic("div_getlock: so=%p NULL so_pcb\n", so);
+               panic("div_getlock: so=%p NULL NO PCB lrh= %s\n", 
+                   so, solockhistory_nr(so));
                return (so->so_proto->pr_domain->dom_mtx);
        }
 }