version 1.203, 2004/05/25 04:34:00 |
version 1.213, 2005/03/29 09:37:08 |
Line 200 int ipprintfs = 0; |
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Line 200 int ipprintfs = 0; |
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#endif |
#endif |
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int ip_do_randomid = 0; |
int ip_do_randomid = 0; |
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int ip_do_loopback_cksum = 0; |
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/* |
/* |
* XXX - Setting ip_checkinterface mostly implements the receive side of |
* XXX - Setting ip_checkinterface mostly implements the receive side of |
Line 222 struct rttimer_queue *ip_mtudisc_timeout |
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Line 223 struct rttimer_queue *ip_mtudisc_timeout |
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int ipqmaxlen = IFQ_MAXLEN; |
int ipqmaxlen = IFQ_MAXLEN; |
u_long in_ifaddrhash; /* size of hash table - 1 */ |
u_long in_ifaddrhash; /* size of hash table - 1 */ |
int in_ifaddrentries; /* total number of addrs */ |
int in_ifaddrentries; /* total number of addrs */ |
struct in_ifaddrhead in_ifaddrhead; |
struct in_ifaddrhead in_ifaddrhead; |
struct in_ifaddrhashhead *in_ifaddrhashtbl; |
struct in_ifaddrhashhead *in_ifaddrhashtbl; |
u_long in_multihash; /* size of hash table - 1 */ |
u_long in_multihash; /* size of hash table - 1 */ |
int in_multientries; /* total number of addrs */ |
int in_multientries; /* total number of addrs */ |
Line 240 struct pfil_head inet_pfil_hook; |
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Line 241 struct pfil_head inet_pfil_hook; |
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* recalculate IP parameters derived from nmbclusters. |
* recalculate IP parameters derived from nmbclusters. |
*/ |
*/ |
static int ip_nmbclusters; /* copy of nmbclusters */ |
static int ip_nmbclusters; /* copy of nmbclusters */ |
static void ip_nmbclusters_changed __P((void)); /* recalc limits */ |
static void ip_nmbclusters_changed(void); /* recalc limits */ |
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#define CHECK_NMBCLUSTER_PARAMS() \ |
#define CHECK_NMBCLUSTER_PARAMS() \ |
do { \ |
do { \ |
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(((((x) & 0xF) | ((((x) >> 8) & 0xF) << 4)) ^ (y)) & IPREASS_HMASK) |
(((((x) & 0xF) | ((((x) >> 8) & 0xF) << 4)) ^ (y)) & IPREASS_HMASK) |
struct ipqhead ipq[IPREASS_NHASH]; |
struct ipqhead ipq[IPREASS_NHASH]; |
int ipq_locked; |
int ipq_locked; |
static int ip_nfragpackets; /* packets in reass queue */ |
static int ip_nfragpackets; /* packets in reass queue */ |
static int ip_nfrags; /* total fragments in reass queues */ |
static int ip_nfrags; /* total fragments in reass queues */ |
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int ip_maxfragpackets = 200; /* limit on packets. XXX sysctl */ |
int ip_maxfragpackets = 200; /* limit on packets. XXX sysctl */ |
Line 266 int ip_maxfrags; /* limit on fr |
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Line 267 int ip_maxfrags; /* limit on fr |
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/* |
/* |
* Additive-Increase/Multiplicative-Decrease (AIMD) strategy for |
* Additive-Increase/Multiplicative-Decrease (AIMD) strategy for |
* IP reassembly queue buffer managment. |
* IP reassembly queue buffer managment. |
* |
* |
* We keep a count of total IP fragments (NB: not fragmented packets!) |
* We keep a count of total IP fragments (NB: not fragmented packets!) |
* awaiting reassembly (ip_nfrags) and a limit (ip_maxfrags) on fragments. |
* awaiting reassembly (ip_nfrags) and a limit (ip_maxfrags) on fragments. |
* If ip_nfrags exceeds ip_maxfrags the limit, we drop half the |
* If ip_nfrags exceeds ip_maxfrags the limit, we drop half the |
Line 274 int ip_maxfrags; /* limit on fr |
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Line 275 int ip_maxfrags; /* limit on fr |
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* repeatedly deleting single packets under heavy fragmentation load |
* repeatedly deleting single packets under heavy fragmentation load |
* (e.g., from lossy NFS peers). |
* (e.g., from lossy NFS peers). |
*/ |
*/ |
static u_int ip_reass_ttl_decr __P((u_int ticks)); |
static u_int ip_reass_ttl_decr(u_int ticks); |
static void ip_reass_drophalf __P((void)); |
static void ip_reass_drophalf(void); |
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static __inline int ipq_lock_try __P((void)); |
static __inline int ipq_lock_try(void); |
static __inline void ipq_unlock __P((void)); |
static __inline void ipq_unlock(void); |
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static __inline int |
static __inline int |
ipq_lock_try() |
ipq_lock_try(void) |
{ |
{ |
int s; |
int s; |
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} |
} |
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static __inline void |
static __inline void |
ipq_unlock() |
ipq_unlock(void) |
{ |
{ |
int s; |
int s; |
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Line 372 static struct ip_srcrt { |
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Line 373 static struct ip_srcrt { |
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struct in_addr route[MAX_IPOPTLEN/sizeof(struct in_addr)]; |
struct in_addr route[MAX_IPOPTLEN/sizeof(struct in_addr)]; |
} ip_srcrt; |
} ip_srcrt; |
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static void save_rte __P((u_char *, struct in_addr)); |
static void save_rte(u_char *, struct in_addr); |
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#ifdef MBUFTRACE |
#ifdef MBUFTRACE |
struct mowner ip_rx_mowner = { "internet", "rx" }; |
struct mowner ip_rx_mowner = { "internet", "rx" }; |
Line 394 ip_nmbclusters_changed(void) |
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Line 395 ip_nmbclusters_changed(void) |
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* All protocols not implemented in kernel go to raw IP protocol handler. |
* All protocols not implemented in kernel go to raw IP protocol handler. |
*/ |
*/ |
void |
void |
ip_init() |
ip_init(void) |
{ |
{ |
const struct protosw *pr; |
const struct protosw *pr; |
int i; |
int i; |
Line 451 struct route ipforward_rt; |
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Line 452 struct route ipforward_rt; |
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* IP software interrupt routine |
* IP software interrupt routine |
*/ |
*/ |
void |
void |
ipintr() |
ipintr(void) |
{ |
{ |
int s; |
int s; |
struct mbuf *m; |
struct mbuf *m; |
Line 572 ip_input(struct mbuf *m) |
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Line 573 ip_input(struct mbuf *m) |
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break; |
break; |
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default: |
default: |
/* Must compute it ourselves. */ |
/* |
INET_CSUM_COUNTER_INCR(&ip_swcsum); |
* Must compute it ourselves. Maybe skip checksum on |
if (in_cksum(m, hlen) != 0) |
* loopback interfaces. |
goto bad; |
*/ |
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if (__predict_true(!(m->m_pkthdr.rcvif->if_flags & |
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IFF_LOOPBACK) || ip_do_loopback_cksum)) { |
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INET_CSUM_COUNTER_INCR(&ip_swcsum); |
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if (in_cksum(m, hlen) != 0) |
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goto badcsum; |
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} |
break; |
break; |
} |
} |
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Line 649 ip_input(struct mbuf *m) |
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Line 656 ip_input(struct mbuf *m) |
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return; |
return; |
ip = mtod(m, struct ip *); |
ip = mtod(m, struct ip *); |
hlen = ip->ip_hl << 2; |
hlen = ip->ip_hl << 2; |
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/* |
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* XXX The setting of "srcrt" here is to prevent ip_forward() |
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* from generating ICMP redirects for packets that have |
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* been redirected by a hook back out on to the same LAN that |
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* they came from and is not an indication that the packet |
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* is being inffluenced by source routing options. This |
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* allows things like |
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* "rdr tlp0 0/0 port 80 -> 1.1.1.200 3128 tcp" |
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* where tlp0 is both on the 1.1.1.0/24 network and is the |
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* default route for hosts on 1.1.1.0/24. Of course this |
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* also requires a "map tlp0 ..." to complete the story. |
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* One might argue whether or not this kind of network config. |
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* should be supported in this manner... |
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*/ |
srcrt = (odst.s_addr != ip->ip_dst.s_addr); |
srcrt = (odst.s_addr != ip->ip_dst.s_addr); |
} |
} |
#endif /* PFIL_HOOKS */ |
#endif /* PFIL_HOOKS */ |
Line 712 ip_input(struct mbuf *m) |
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Line 733 ip_input(struct mbuf *m) |
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if (ia != NULL) |
if (ia != NULL) |
goto ours; |
goto ours; |
if (m->m_pkthdr.rcvif->if_flags & IFF_BROADCAST) { |
if (m->m_pkthdr.rcvif->if_flags & IFF_BROADCAST) { |
TAILQ_FOREACH(ifa, &m->m_pkthdr.rcvif->if_addrlist, ifa_list) { |
IFADDR_FOREACH(ifa, m->m_pkthdr.rcvif) { |
if (ifa->ifa_addr->sa_family != AF_INET) |
if (ifa->ifa_addr->sa_family != AF_INET) |
continue; |
continue; |
ia = ifatoia(ifa); |
ia = ifatoia(ifa); |
Line 815 ip_input(struct mbuf *m) |
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Line 836 ip_input(struct mbuf *m) |
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sp = ipsec_getpolicy(tdbi, IPSEC_DIR_INBOUND); |
sp = ipsec_getpolicy(tdbi, IPSEC_DIR_INBOUND); |
} else { |
} else { |
sp = ipsec_getpolicybyaddr(m, IPSEC_DIR_INBOUND, |
sp = ipsec_getpolicybyaddr(m, IPSEC_DIR_INBOUND, |
IP_FORWARDING, &error); |
IP_FORWARDING, &error); |
} |
} |
if (sp == NULL) { /* NB: can happen if error */ |
if (sp == NULL) { /* NB: can happen if error */ |
splx(s); |
splx(s); |
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* done. If so, then just pass it along. This tag gets |
* done. If so, then just pass it along. This tag gets |
* set during AH, ESP, etc. input handling, before the |
* set during AH, ESP, etc. input handling, before the |
* packet is returned to the ip input queue for delivery. |
* packet is returned to the ip input queue for delivery. |
*/ |
*/ |
mtag = m_tag_find(m, PACKET_TAG_IPSEC_IN_DONE, NULL); |
mtag = m_tag_find(m, PACKET_TAG_IPSEC_IN_DONE, NULL); |
s = splsoftnet(); |
s = splsoftnet(); |
if (mtag != NULL) { |
if (mtag != NULL) { |
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sp = ipsec_getpolicy(tdbi, IPSEC_DIR_INBOUND); |
sp = ipsec_getpolicy(tdbi, IPSEC_DIR_INBOUND); |
} else { |
} else { |
sp = ipsec_getpolicybyaddr(m, IPSEC_DIR_INBOUND, |
sp = ipsec_getpolicybyaddr(m, IPSEC_DIR_INBOUND, |
IP_FORWARDING, &error); |
IP_FORWARDING, &error); |
} |
} |
if (sp != NULL) { |
if (sp != NULL) { |
/* |
/* |
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* is given as fp; otherwise have to make a chain. |
* is given as fp; otherwise have to make a chain. |
*/ |
*/ |
struct mbuf * |
struct mbuf * |
ip_reass(ipqe, fp, ipqhead) |
ip_reass(struct ipqent *ipqe, struct ipq *fp, struct ipqhead *ipqhead) |
struct ipqent *ipqe; |
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struct ipq *fp; |
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struct ipqhead *ipqhead; |
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{ |
{ |
struct mbuf *m = ipqe->ipqe_m; |
struct mbuf *m = ipqe->ipqe_m; |
struct ipqent *nq, *p, *q; |
struct ipqent *nq, *p, *q; |
Line 1057 ip_reass(ipqe, fp, ipqhead) |
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Line 1075 ip_reass(ipqe, fp, ipqhead) |
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* We are about to add a fragment; increment frag count. |
* We are about to add a fragment; increment frag count. |
*/ |
*/ |
ip_nfrags++; |
ip_nfrags++; |
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/* |
/* |
* If first fragment to arrive, create a reassembly queue. |
* If first fragment to arrive, create a reassembly queue. |
*/ |
*/ |
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for (t = m; t; t = t->m_next) |
for (t = m; t; t = t->m_next) |
plen += t->m_len; |
plen += t->m_len; |
m->m_pkthdr.len = plen; |
m->m_pkthdr.len = plen; |
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m->m_pkthdr.csum_flags = 0; |
} |
} |
return (m); |
return (m); |
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* associated datagrams. |
* associated datagrams. |
*/ |
*/ |
void |
void |
ip_freef(fp) |
ip_freef(struct ipq *fp) |
struct ipq *fp; |
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{ |
{ |
struct ipqent *q, *p; |
struct ipqent *q, *p; |
u_int nfrags = 0; |
u_int nfrags = 0; |
Line 1268 ip_reass_ttl_decr(u_int ticks) |
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Line 1286 ip_reass_ttl_decr(u_int ticks) |
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u_int nfrags, median, dropfraction, keepfraction; |
u_int nfrags, median, dropfraction, keepfraction; |
struct ipq *fp, *nfp; |
struct ipq *fp, *nfp; |
int i; |
int i; |
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nfrags = 0; |
nfrags = 0; |
memset(fragttl_histo, 0, sizeof fragttl_histo); |
memset(fragttl_histo, 0, sizeof fragttl_histo); |
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for (i = 0; i < IPREASS_NHASH; i++) { |
for (i = 0; i < IPREASS_NHASH; i++) { |
for (fp = LIST_FIRST(&ipq[i]); fp != NULL; fp = nfp) { |
for (fp = LIST_FIRST(&ipq[i]); fp != NULL; fp = nfp) { |
fp->ipq_ttl = ((fp->ipq_ttl <= ticks) ? |
fp->ipq_ttl = ((fp->ipq_ttl <= ticks) ? |
Line 1324 ip_reass_drophalf(void) |
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Line 1342 ip_reass_drophalf(void) |
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* queue, discard it. |
* queue, discard it. |
*/ |
*/ |
void |
void |
ip_slowtimo() |
ip_slowtimo(void) |
{ |
{ |
static u_int dropscanidx = 0; |
static u_int dropscanidx = 0; |
u_int i; |
u_int i; |
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* Drain off all datagram fragments. |
* Drain off all datagram fragments. |
*/ |
*/ |
void |
void |
ip_drain() |
ip_drain(void) |
{ |
{ |
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/* |
/* |
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* 0 if the packet should be processed further. |
* 0 if the packet should be processed further. |
*/ |
*/ |
int |
int |
ip_dooptions(m) |
ip_dooptions(struct mbuf *m) |
struct mbuf *m; |
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{ |
{ |
struct ip *ip = mtod(m, struct ip *); |
struct ip *ip = mtod(m, struct ip *); |
u_char *cp, *cp0; |
u_char *cp, *cp0; |
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* return internet address info of interface to be used to get there. |
* return internet address info of interface to be used to get there. |
*/ |
*/ |
struct in_ifaddr * |
struct in_ifaddr * |
ip_rtaddr(dst) |
ip_rtaddr(struct in_addr dst) |
struct in_addr dst; |
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{ |
{ |
struct sockaddr_in *sin; |
struct sockaddr_in *sin; |
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* to be picked up later by ip_srcroute if the receiver is interested. |
* to be picked up later by ip_srcroute if the receiver is interested. |
*/ |
*/ |
void |
void |
save_rte(option, dst) |
save_rte(u_char *option, struct in_addr dst) |
u_char *option; |
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struct in_addr dst; |
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{ |
{ |
unsigned olen; |
unsigned olen; |
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Line 1690 save_rte(option, dst) |
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Line 1704 save_rte(option, dst) |
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* The first hop is placed before the options, will be removed later. |
* The first hop is placed before the options, will be removed later. |
*/ |
*/ |
struct mbuf * |
struct mbuf * |
ip_srcroute() |
ip_srcroute(void) |
{ |
{ |
struct in_addr *p, *q; |
struct in_addr *p, *q; |
struct mbuf *m; |
struct mbuf *m; |
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* XXX should be deleted; last arg currently ignored. |
* XXX should be deleted; last arg currently ignored. |
*/ |
*/ |
void |
void |
ip_stripoptions(m, mopt) |
ip_stripoptions(struct mbuf *m, struct mbuf *mopt) |
struct mbuf *m; |
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struct mbuf *mopt; |
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{ |
{ |
int i; |
int i; |
struct ip *ip = mtod(m, struct ip *); |
struct ip *ip = mtod(m, struct ip *); |
Line 1806 const int inetctlerrmap[PRC_NCMDS] = { |
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Line 1818 const int inetctlerrmap[PRC_NCMDS] = { |
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* via a source route. |
* via a source route. |
*/ |
*/ |
void |
void |
ip_forward(m, srcrt) |
ip_forward(struct mbuf *m, int srcrt) |
struct mbuf *m; |
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int srcrt; |
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{ |
{ |
struct ip *ip = mtod(m, struct ip *); |
struct ip *ip = mtod(m, struct ip *); |
struct sockaddr_in *sin; |
struct sockaddr_in *sin; |
Line 2036 ip_forward(m, srcrt) |
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Line 2046 ip_forward(m, srcrt) |
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} |
} |
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void |
void |
ip_savecontrol(inp, mp, ip, m) |
ip_savecontrol(struct inpcb *inp, struct mbuf **mp, struct ip *ip, |
struct inpcb *inp; |
struct mbuf *m) |
struct mbuf **mp; |
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struct ip *ip; |
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struct mbuf *m; |
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{ |
{ |
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if (inp->inp_socket->so_options & SO_TIMESTAMP) { |
if (inp->inp_socket->so_options & SO_TIMESTAMP) { |
Line 2133 sysctl_net_inet_ip_maxflows(SYSCTLFN_ARG |
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Line 2140 sysctl_net_inet_ip_maxflows(SYSCTLFN_ARG |
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s = sysctl_lookup(SYSCTLFN_CALL(rnode)); |
s = sysctl_lookup(SYSCTLFN_CALL(rnode)); |
if (s) |
if (s) |
return (s); |
return (s); |
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s = splsoftnet(); |
s = splsoftnet(); |
ipflow_reap(0); |
ipflow_reap(0); |
splx(s); |
splx(s); |
Line 2164 SYSCTL_SETUP(sysctl_net_inet_ip_setup, " |
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Line 2171 SYSCTL_SETUP(sysctl_net_inet_ip_setup, " |
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SYSCTL_DESCR("IPv4 related settings"), |
SYSCTL_DESCR("IPv4 related settings"), |
NULL, 0, NULL, 0, |
NULL, 0, NULL, 0, |
CTL_NET, PF_INET, IPPROTO_IP, CTL_EOL); |
CTL_NET, PF_INET, IPPROTO_IP, CTL_EOL); |
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sysctl_createv(clog, 0, NULL, NULL, |
sysctl_createv(clog, 0, NULL, NULL, |
CTLFLAG_PERMANENT|CTLFLAG_READWRITE, |
CTLFLAG_PERMANENT|CTLFLAG_READWRITE, |
CTLTYPE_INT, "forwarding", |
CTLTYPE_INT, "forwarding", |
Line 2328 SYSCTL_SETUP(sysctl_net_inet_ip_setup, " |
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Line 2335 SYSCTL_SETUP(sysctl_net_inet_ip_setup, " |
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NULL, 0, &ip_do_randomid, 0, |
NULL, 0, &ip_do_randomid, 0, |
CTL_NET, PF_INET, IPPROTO_IP, |
CTL_NET, PF_INET, IPPROTO_IP, |
IPCTL_RANDOMID, CTL_EOL); |
IPCTL_RANDOMID, CTL_EOL); |
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sysctl_createv(clog, 0, NULL, NULL, |
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CTLFLAG_PERMANENT|CTLFLAG_READWRITE, |
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CTLTYPE_INT, "do_loopback_cksum", |
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SYSCTL_DESCR("Perform IP checksum on loopback"), |
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NULL, 0, &ip_do_loopback_cksum, 0, |
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CTL_NET, PF_INET, IPPROTO_IP, |
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IPCTL_LOOPBACKCKSUM, CTL_EOL); |
} |
} |