version 1.192, 2003/12/08 02:23:27 |
version 1.211, 2005/02/03 22:56:42 |
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 219 int ip_checkinterface = 0; |
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Line 220 int ip_checkinterface = 0; |
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struct rttimer_queue *ip_mtudisc_timeout_q = NULL; |
struct rttimer_queue *ip_mtudisc_timeout_q = NULL; |
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extern struct domain inetdomain; |
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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 */ |
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struct pfil_head inet_pfil_hook; |
struct pfil_head inet_pfil_hook; |
#endif |
#endif |
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/* |
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* Cached copy of nmbclusters. If nbclusters is different, |
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* recalculate IP parameters derived from nmbclusters. |
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*/ |
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static int ip_nmbclusters; /* copy of nmbclusters */ |
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static void ip_nmbclusters_changed(void); /* recalc limits */ |
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#define CHECK_NMBCLUSTER_PARAMS() \ |
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do { \ |
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if (__predict_false(ip_nmbclusters != nmbclusters)) \ |
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ip_nmbclusters_changed(); \ |
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} while (/*CONSTCOND*/0) |
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/* IP datagram reassembly queues (hashed) */ |
/* IP datagram reassembly queues (hashed) */ |
#define IPREASS_NHASH_LOG2 6 |
#define IPREASS_NHASH_LOG2 6 |
#define IPREASS_NHASH (1 << IPREASS_NHASH_LOG2) |
#define IPREASS_NHASH (1 << IPREASS_NHASH_LOG2) |
Line 244 struct pfil_head inet_pfil_hook; |
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Line 257 struct pfil_head inet_pfil_hook; |
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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; |
int ip_nfragpackets = 0; |
static int ip_nfragpackets; /* packets in reass queue */ |
int ip_maxfragpackets = 200; |
static int ip_nfrags; /* total fragments in reass queues */ |
int ip_nfrags = 0; /* total fragments in reass queues */ |
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|
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static __inline int ipq_lock_try __P((void)); |
int ip_maxfragpackets = 200; /* limit on packets. XXX sysctl */ |
static __inline void ipq_unlock __P((void)); |
int ip_maxfrags; /* limit on fragments. XXX sysctl */ |
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|
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/* |
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* Additive-Increase/Multiplicative-Decrease (AIMD) strategy for |
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* IP reassembly queue buffer managment. |
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* |
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* We keep a count of total IP fragments (NB: not fragmented packets!) |
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* awaiting reassembly (ip_nfrags) and a limit (ip_maxfrags) on fragments. |
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* If ip_nfrags exceeds ip_maxfrags the limit, we drop half the |
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* total fragments in reassembly queues.This AIMD policy avoids |
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* repeatedly deleting single packets under heavy fragmentation load |
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* (e.g., from lossy NFS peers). |
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*/ |
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static u_int ip_reass_ttl_decr(u_int ticks); |
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static void ip_reass_drophalf(void); |
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static __inline int ipq_lock_try(void); |
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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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#define IPQ_UNLOCK() ipq_unlock() |
#define IPQ_UNLOCK() ipq_unlock() |
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struct pool inmulti_pool; |
POOL_INIT(inmulti_pool, sizeof(struct in_multi), 0, 0, 0, "inmltpl", NULL); |
struct pool ipqent_pool; |
POOL_INIT(ipqent_pool, sizeof(struct ipqent), 0, 0, 0, "ipqepl", NULL); |
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#ifdef INET_CSUM_COUNTERS |
#ifdef INET_CSUM_COUNTERS |
#include <sys/device.h> |
#include <sys/device.h> |
Line 317 struct evcnt ip_swcsum = EVCNT_INITIALIZ |
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Line 348 struct evcnt ip_swcsum = EVCNT_INITIALIZ |
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#define INET_CSUM_COUNTER_INCR(ev) (ev)->ev_count++ |
#define INET_CSUM_COUNTER_INCR(ev) (ev)->ev_count++ |
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EVCNT_ATTACH_STATIC(ip_hwcsum_bad); |
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EVCNT_ATTACH_STATIC(ip_hwcsum_ok); |
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EVCNT_ATTACH_STATIC(ip_swcsum); |
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#else |
#else |
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#define INET_CSUM_COUNTER_INCR(ev) /* nothing */ |
#define INET_CSUM_COUNTER_INCR(ev) /* nothing */ |
Line 338 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 346 struct mowner ip_tx_mowner = { "internet |
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Line 381 struct mowner ip_tx_mowner = { "internet |
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#endif |
#endif |
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/* |
/* |
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* Compute IP limits derived from the value of nmbclusters. |
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*/ |
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static void |
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ip_nmbclusters_changed(void) |
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{ |
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ip_maxfrags = nmbclusters / 4; |
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ip_nmbclusters = nmbclusters; |
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} |
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/* |
* IP initialization: fill in IP protocol switch table. |
* IP initialization: fill in IP protocol switch table. |
* 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) |
{ |
{ |
struct protosw *pr; |
const struct protosw *pr; |
int i; |
int i; |
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pool_init(&inmulti_pool, sizeof(struct in_multi), 0, 0, 0, "inmltpl", |
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NULL); |
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pool_init(&ipqent_pool, sizeof(struct ipqent), 0, 0, 0, "ipqepl", |
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NULL); |
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pr = pffindproto(PF_INET, IPPROTO_RAW, SOCK_RAW); |
pr = pffindproto(PF_INET, IPPROTO_RAW, SOCK_RAW); |
if (pr == 0) |
if (pr == 0) |
panic("ip_init"); |
panic("ip_init"); |
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LIST_INIT(&ipq[i]); |
LIST_INIT(&ipq[i]); |
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ip_id = time.tv_sec & 0xfffff; |
ip_id = time.tv_sec & 0xfffff; |
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ipintrq.ifq_maxlen = ipqmaxlen; |
ipintrq.ifq_maxlen = ipqmaxlen; |
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ip_nmbclusters_changed(); |
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TAILQ_INIT(&in_ifaddrhead); |
TAILQ_INIT(&in_ifaddrhead); |
in_ifaddrhashtbl = hashinit(IN_IFADDR_HASH_SIZE, HASH_LIST, M_IFADDR, |
in_ifaddrhashtbl = hashinit(IN_IFADDR_HASH_SIZE, HASH_LIST, M_IFADDR, |
M_WAITOK, &in_ifaddrhash); |
M_WAITOK, &in_ifaddrhash); |
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"error %d\n", i); |
"error %d\n", i); |
#endif /* PFIL_HOOKS */ |
#endif /* PFIL_HOOKS */ |
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#ifdef INET_CSUM_COUNTERS |
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evcnt_attach_static(&ip_hwcsum_bad); |
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evcnt_attach_static(&ip_hwcsum_ok); |
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evcnt_attach_static(&ip_swcsum); |
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#endif /* INET_CSUM_COUNTERS */ |
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#ifdef MBUFTRACE |
#ifdef MBUFTRACE |
MOWNER_ATTACH(&ip_tx_mowner); |
MOWNER_ATTACH(&ip_tx_mowner); |
MOWNER_ATTACH(&ip_rx_mowner); |
MOWNER_ATTACH(&ip_rx_mowner); |
Line 415 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 536 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 572 ip_input(struct mbuf *m) |
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Line 615 ip_input(struct mbuf *m) |
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m_adj(m, len - m->m_pkthdr.len); |
m_adj(m, len - m->m_pkthdr.len); |
} |
} |
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#if defined(IPSEC) || defined(FAST_IPSEC) |
#if defined(IPSEC) |
/* ipflow (IP fast forwarding) is not compatible with IPsec. */ |
/* ipflow (IP fast forwarding) is not compatible with IPsec. */ |
m->m_flags &= ~M_CANFASTFWD; |
m->m_flags &= ~M_CANFASTFWD; |
#else |
#else |
Line 613 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 676 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 702 ip_input(struct mbuf *m) |
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Line 759 ip_input(struct mbuf *m) |
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#ifdef MROUTING |
#ifdef MROUTING |
extern struct socket *ip_mrouter; |
extern struct socket *ip_mrouter; |
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if (M_READONLY(m)) { |
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if ((m = m_pullup(m, hlen)) == 0) { |
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ipstat.ips_toosmall++; |
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return; |
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} |
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ip = mtod(m, struct ip *); |
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} |
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if (ip_mrouter) { |
if (ip_mrouter) { |
/* |
/* |
* If we are acting as a multicast router, all |
* If we are acting as a multicast router, all |
Line 806 ip_input(struct mbuf *m) |
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Line 855 ip_input(struct mbuf *m) |
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ipstat.ips_cantforward++; |
ipstat.ips_cantforward++; |
goto bad; |
goto bad; |
} |
} |
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/* |
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* Peek at the outbound SP for this packet to determine if |
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* it's a Fast Forward candidate. |
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*/ |
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mtag = m_tag_find(m, PACKET_TAG_IPSEC_PENDING_TDB, NULL); |
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if (mtag != NULL) |
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m->m_flags &= ~M_CANFASTFWD; |
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else { |
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s = splsoftnet(); |
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sp = ipsec4_checkpolicy(m, IPSEC_DIR_OUTBOUND, |
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(IP_FORWARDING | |
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(ip_directedbcast ? IP_ALLOWBROADCAST : 0)), |
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&error, NULL); |
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if (sp != NULL) { |
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m->m_flags &= ~M_CANFASTFWD; |
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KEY_FREESP(&sp); |
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} |
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splx(s); |
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} |
#endif /* FAST_IPSEC */ |
#endif /* FAST_IPSEC */ |
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ip_forward(m, srcrt); |
ip_forward(m, srcrt); |
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* but it's not worth the time; just let them time out.) |
* but it's not worth the time; just let them time out.) |
*/ |
*/ |
if (ip->ip_off & ~htons(IP_DF|IP_RF)) { |
if (ip->ip_off & ~htons(IP_DF|IP_RF)) { |
if (M_READONLY(m)) { |
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if ((m = m_pullup(m, hlen)) == NULL) { |
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ipstat.ips_toosmall++; |
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goto bad; |
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} |
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ip = mtod(m, struct ip *); |
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} |
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/* |
/* |
* Look for queue of fragments |
* Look for queue of fragments |
|
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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 1003 ip_reass(ipqe, fp, ipqhead) |
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Line 1062 ip_reass(ipqe, fp, ipqhead) |
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m->m_data += hlen; |
m->m_data += hlen; |
m->m_len -= hlen; |
m->m_len -= hlen; |
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#ifdef notyet |
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/* make sure fragment limit is up-to-date */ |
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CHECK_NMBCLUSTER_PARAMS(); |
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/* If we have too many fragments, drop the older half. */ |
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if (ip_nfrags >= ip_maxfrags) |
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ip_reass_drophalf(void); |
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#endif |
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/* |
/* |
* We are about to add a fragment; increment frag count. |
* We are about to add a fragment; increment frag count. |
*/ |
*/ |
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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; |
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} |
} |
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/* |
/* |
* IP timer processing; |
* IP reassembly TTL machinery for multiplicative drop. |
* if a timer expires on a reassembly |
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* queue, discard it. |
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*/ |
*/ |
void |
static u_int fragttl_histo[(IPFRAGTTL+1)]; |
ip_slowtimo() |
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/* |
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* Decrement TTL of all reasembly queue entries by `ticks'. |
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* Count number of distinct fragments (as opposed to partial, fragmented |
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* datagrams) in the reassembly queue. While we traverse the entire |
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* reassembly queue, compute and return the median TTL over all fragments. |
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*/ |
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static u_int |
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ip_reass_ttl_decr(u_int ticks) |
{ |
{ |
static u_int dropscanidx = 0; |
u_int nfrags, median, dropfraction, keepfraction; |
u_int i; |
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struct ipq *fp, *nfp; |
struct ipq *fp, *nfp; |
int s = splsoftnet(); |
int i; |
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IPQ_LOCK(); |
nfrags = 0; |
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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) { |
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fp->ipq_ttl = ((fp->ipq_ttl <= ticks) ? |
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0 : fp->ipq_ttl - ticks); |
nfp = LIST_NEXT(fp, ipq_q); |
nfp = LIST_NEXT(fp, ipq_q); |
if (--fp->ipq_ttl == 0) { |
if (fp->ipq_ttl == 0) { |
ipstat.ips_fragtimeout++; |
ipstat.ips_fragtimeout++; |
ip_freef(fp); |
ip_freef(fp); |
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} else { |
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nfrags += fp->ipq_nfrags; |
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fragttl_histo[fp->ipq_ttl] += fp->ipq_nfrags; |
} |
} |
} |
} |
} |
} |
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KASSERT(ip_nfrags == nfrags); |
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/* Find median (or other drop fraction) in histogram. */ |
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dropfraction = (ip_nfrags / 2); |
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keepfraction = ip_nfrags - dropfraction; |
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for (i = IPFRAGTTL, median = 0; i >= 0; i--) { |
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median += fragttl_histo[i]; |
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if (median >= keepfraction) |
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break; |
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} |
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/* Return TTL of median (or other fraction). */ |
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return (u_int)i; |
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} |
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void |
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ip_reass_drophalf(void) |
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{ |
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|
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u_int median_ticks; |
/* |
/* |
* If we are over the maximum number of fragments |
* Compute median TTL of all fragments, and count frags |
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* with that TTL or lower (roughly half of all fragments). |
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*/ |
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median_ticks = ip_reass_ttl_decr(0); |
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|
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/* Drop half. */ |
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median_ticks = ip_reass_ttl_decr(median_ticks); |
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} |
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/* |
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* IP timer processing; |
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* if a timer expires on a reassembly |
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* queue, discard it. |
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*/ |
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void |
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ip_slowtimo(void) |
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{ |
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static u_int dropscanidx = 0; |
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u_int i; |
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u_int median_ttl; |
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int s = splsoftnet(); |
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IPQ_LOCK(); |
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/* Age TTL of all fragments by 1 tick .*/ |
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median_ttl = ip_reass_ttl_decr(1); |
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|
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/* make sure fragment limit is up-to-date */ |
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CHECK_NMBCLUSTER_PARAMS(); |
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/* If we have too many fragments, drop the older half. */ |
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if (ip_nfrags > ip_maxfrags) |
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ip_reass_ttl_decr(median_ttl); |
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/* |
|
* If we are over the maximum number of fragmented packets |
* (due to the limit being lowered), drain off |
* (due to the limit being lowered), drain off |
* enough to get down to the new limit. Start draining |
* enough to get down to the new limit. Start draining |
* from the reassembly hashqueue most recently drained. |
* from the reassembly hashqueue most recently drained. |
|
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* Drain off all datagram fragments. |
* Drain off all datagram fragments. |
*/ |
*/ |
void |
void |
ip_drain() |
ip_drain(void) |
{ |
{ |
int i; |
|
|
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/* |
/* |
* We may be called from a device's interrupt context. If |
* We may be called from a device's interrupt context. If |
|
|
if (ipq_lock_try() == 0) |
if (ipq_lock_try() == 0) |
return; |
return; |
|
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for (i = 0; i < IPREASS_NHASH; i++) { |
/* |
struct ipqhead *ipqh = &ipq[i]; |
* Drop half the total fragments now. If more mbufs are needed, |
struct ipq *fp, *nfp; |
* we will be called again soon. |
for (fp = LIST_FIRST(ipqh); fp != NULL; fp = nfp) { |
*/ |
nfp = LIST_NEXT(fp, ipq_q); |
ip_reass_drophalf(); |
ip_freef(fp); |
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ipstat.ips_fragdropped++; |
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} |
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} |
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|
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IPQ_UNLOCK(); |
IPQ_UNLOCK(); |
} |
} |
|
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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; |
|
{ |
{ |
struct ip *ip = mtod(m, struct ip *); |
struct ip *ip = mtod(m, struct ip *); |
u_char *cp, *cp0; |
u_char *cp, *cp0; |
Line 1381 ip_dooptions(m) |
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Line 1512 ip_dooptions(m) |
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bcopy((caddr_t)(cp + off), (caddr_t)&ipaddr.sin_addr, |
bcopy((caddr_t)(cp + off), (caddr_t)&ipaddr.sin_addr, |
sizeof(ipaddr.sin_addr)); |
sizeof(ipaddr.sin_addr)); |
if (opt == IPOPT_SSRR) |
if (opt == IPOPT_SSRR) |
ia = ifatoia(ifa_ifwithaddr(sintosa(&ipaddr))); |
ia = ifatoia(ifa_ifwithladdr(sintosa(&ipaddr))); |
else |
else |
ia = ip_rtaddr(ipaddr.sin_addr); |
ia = ip_rtaddr(ipaddr.sin_addr); |
if (ia == 0) { |
if (ia == 0) { |
|
|
* 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; |
|
{ |
{ |
struct sockaddr_in *sin; |
struct sockaddr_in *sin; |
|
|
|
|
* 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; |
|
struct in_addr dst; |
|
{ |
{ |
unsigned olen; |
unsigned olen; |
|
|
Line 1575 save_rte(option, dst) |
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Line 1703 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; |
|
|
* 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; |
|
struct mbuf *mopt; |
|
{ |
{ |
int i; |
int i; |
struct ip *ip = mtod(m, struct ip *); |
struct ip *ip = mtod(m, struct ip *); |
Line 1691 const int inetctlerrmap[PRC_NCMDS] = { |
|
Line 1817 const int inetctlerrmap[PRC_NCMDS] = { |
|
* via a source route. |
* via a source route. |
*/ |
*/ |
void |
void |
ip_forward(m, srcrt) |
ip_forward(struct mbuf *m, int srcrt) |
struct mbuf *m; |
|
int srcrt; |
|
{ |
{ |
struct ip *ip = mtod(m, struct ip *); |
struct ip *ip = mtod(m, struct ip *); |
struct sockaddr_in *sin; |
struct sockaddr_in *sin; |
Line 1921 ip_forward(m, srcrt) |
|
Line 2045 ip_forward(m, srcrt) |
|
} |
} |
|
|
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; |
|
struct ip *ip; |
|
struct mbuf *m; |
|
{ |
{ |
|
|
if (inp->inp_socket->so_options & SO_TIMESTAMP) { |
if (inp->inp_socket->so_options & SO_TIMESTAMP) { |
Line 2032 SYSCTL_SETUP(sysctl_net_inet_ip_setup, " |
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Line 2153 SYSCTL_SETUP(sysctl_net_inet_ip_setup, " |
|
{ |
{ |
extern int subnetsarelocal, hostzeroisbroadcast; |
extern int subnetsarelocal, hostzeroisbroadcast; |
|
|
sysctl_createv(SYSCTL_PERMANENT, |
sysctl_createv(clog, 0, NULL, NULL, |
|
CTLFLAG_PERMANENT, |
CTLTYPE_NODE, "net", NULL, |
CTLTYPE_NODE, "net", NULL, |
NULL, 0, NULL, 0, |
NULL, 0, NULL, 0, |
CTL_NET, CTL_EOL); |
CTL_NET, CTL_EOL); |
sysctl_createv(SYSCTL_PERMANENT, |
sysctl_createv(clog, 0, NULL, NULL, |
CTLTYPE_NODE, "inet", NULL, |
CTLFLAG_PERMANENT, |
|
CTLTYPE_NODE, "inet", |
|
SYSCTL_DESCR("PF_INET related settings"), |
NULL, 0, NULL, 0, |
NULL, 0, NULL, 0, |
CTL_NET, PF_INET, CTL_EOL); |
CTL_NET, PF_INET, CTL_EOL); |
sysctl_createv(SYSCTL_PERMANENT, |
sysctl_createv(clog, 0, NULL, NULL, |
CTLTYPE_NODE, "ip", NULL, |
CTLFLAG_PERMANENT, |
|
CTLTYPE_NODE, "ip", |
|
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); |
|
|
sysctl_createv(SYSCTL_PERMANENT|SYSCTL_READWRITE, |
sysctl_createv(clog, 0, NULL, NULL, |
CTLTYPE_INT, "forwarding", NULL, |
CTLFLAG_PERMANENT|CTLFLAG_READWRITE, |
|
CTLTYPE_INT, "forwarding", |
|
SYSCTL_DESCR("Enable forwarding of INET datagrams"), |
NULL, 0, &ipforwarding, 0, |
NULL, 0, &ipforwarding, 0, |
CTL_NET, PF_INET, IPPROTO_IP, |
CTL_NET, PF_INET, IPPROTO_IP, |
IPCTL_FORWARDING, CTL_EOL); |
IPCTL_FORWARDING, CTL_EOL); |
sysctl_createv(SYSCTL_PERMANENT|SYSCTL_READWRITE, |
sysctl_createv(clog, 0, NULL, NULL, |
CTLTYPE_INT, "redirect", NULL, |
CTLFLAG_PERMANENT|CTLFLAG_READWRITE, |
|
CTLTYPE_INT, "redirect", |
|
SYSCTL_DESCR("Enable sending of ICMP redirect messages"), |
NULL, 0, &ipsendredirects, 0, |
NULL, 0, &ipsendredirects, 0, |
CTL_NET, PF_INET, IPPROTO_IP, |
CTL_NET, PF_INET, IPPROTO_IP, |
IPCTL_SENDREDIRECTS, CTL_EOL); |
IPCTL_SENDREDIRECTS, CTL_EOL); |
sysctl_createv(SYSCTL_PERMANENT|SYSCTL_READWRITE, |
sysctl_createv(clog, 0, NULL, NULL, |
CTLTYPE_INT, "ttl", NULL, |
CTLFLAG_PERMANENT|CTLFLAG_READWRITE, |
|
CTLTYPE_INT, "ttl", |
|
SYSCTL_DESCR("Default TTL for an INET datagram"), |
NULL, 0, &ip_defttl, 0, |
NULL, 0, &ip_defttl, 0, |
CTL_NET, PF_INET, IPPROTO_IP, |
CTL_NET, PF_INET, IPPROTO_IP, |
IPCTL_DEFTTL, CTL_EOL); |
IPCTL_DEFTTL, CTL_EOL); |
#ifdef IPCTL_DEFMTU |
#ifdef IPCTL_DEFMTU |
sysctl_createv(SYSCTL_PERMANENT /* |SYSCTL_READWRITE? */, |
sysctl_createv(clog, 0, NULL, NULL, |
CTLTYPE_INT, "mtu", NULL, |
CTLFLAG_PERMANENT /* |CTLFLAG_READWRITE? */, |
|
CTLTYPE_INT, "mtu", |
|
SYSCTL_DESCR("Default MTA for an INET route"), |
NULL, 0, &ip_mtu, 0, |
NULL, 0, &ip_mtu, 0, |
CTL_NET, PF_INET, IPPROTO_IP, |
CTL_NET, PF_INET, IPPROTO_IP, |
IPCTL_DEFMTU, CTL_EOL); |
IPCTL_DEFMTU, CTL_EOL); |
#endif /* IPCTL_DEFMTU */ |
#endif /* IPCTL_DEFMTU */ |
sysctl_createv(SYSCTL_PERMANENT|SYSCTL_READONLY1, |
sysctl_createv(clog, 0, NULL, NULL, |
CTLTYPE_INT, "forwsrcrt", NULL, |
CTLFLAG_PERMANENT|CTLFLAG_READONLY1, |
|
CTLTYPE_INT, "forwsrcrt", |
|
SYSCTL_DESCR("Enable forwarding of source-routed " |
|
"datagrams"), |
NULL, 0, &ip_forwsrcrt, 0, |
NULL, 0, &ip_forwsrcrt, 0, |
CTL_NET, PF_INET, IPPROTO_IP, |
CTL_NET, PF_INET, IPPROTO_IP, |
IPCTL_FORWSRCRT, CTL_EOL); |
IPCTL_FORWSRCRT, CTL_EOL); |
sysctl_createv(SYSCTL_PERMANENT|SYSCTL_READWRITE, |
sysctl_createv(clog, 0, NULL, NULL, |
CTLTYPE_INT, "directed-broadcast", NULL, |
CTLFLAG_PERMANENT|CTLFLAG_READWRITE, |
|
CTLTYPE_INT, "directed-broadcast", |
|
SYSCTL_DESCR("Enable forwarding of broadcast datagrams"), |
NULL, 0, &ip_directedbcast, 0, |
NULL, 0, &ip_directedbcast, 0, |
CTL_NET, PF_INET, IPPROTO_IP, |
CTL_NET, PF_INET, IPPROTO_IP, |
IPCTL_DIRECTEDBCAST, CTL_EOL); |
IPCTL_DIRECTEDBCAST, CTL_EOL); |
sysctl_createv(SYSCTL_PERMANENT|SYSCTL_READWRITE, |
sysctl_createv(clog, 0, NULL, NULL, |
CTLTYPE_INT, "allowsrcrt", NULL, |
CTLFLAG_PERMANENT|CTLFLAG_READWRITE, |
|
CTLTYPE_INT, "allowsrcrt", |
|
SYSCTL_DESCR("Accept source-routed datagrams"), |
NULL, 0, &ip_allowsrcrt, 0, |
NULL, 0, &ip_allowsrcrt, 0, |
CTL_NET, PF_INET, IPPROTO_IP, |
CTL_NET, PF_INET, IPPROTO_IP, |
IPCTL_ALLOWSRCRT, CTL_EOL); |
IPCTL_ALLOWSRCRT, CTL_EOL); |
sysctl_createv(SYSCTL_PERMANENT|SYSCTL_READWRITE, |
sysctl_createv(clog, 0, NULL, NULL, |
CTLTYPE_INT, "subnetsarelocal", NULL, |
CTLFLAG_PERMANENT|CTLFLAG_READWRITE, |
|
CTLTYPE_INT, "subnetsarelocal", |
|
SYSCTL_DESCR("Whether logical subnets are considered " |
|
"local"), |
NULL, 0, &subnetsarelocal, 0, |
NULL, 0, &subnetsarelocal, 0, |
CTL_NET, PF_INET, IPPROTO_IP, |
CTL_NET, PF_INET, IPPROTO_IP, |
IPCTL_SUBNETSARELOCAL, CTL_EOL); |
IPCTL_SUBNETSARELOCAL, CTL_EOL); |
sysctl_createv(SYSCTL_PERMANENT|SYSCTL_READWRITE, |
sysctl_createv(clog, 0, NULL, NULL, |
CTLTYPE_INT, "mtudisc", NULL, |
CTLFLAG_PERMANENT|CTLFLAG_READWRITE, |
|
CTLTYPE_INT, "mtudisc", |
|
SYSCTL_DESCR("Use RFC1191 Path MTU Discovery"), |
NULL, 0, &ip_mtudisc, 0, |
NULL, 0, &ip_mtudisc, 0, |
CTL_NET, PF_INET, IPPROTO_IP, |
CTL_NET, PF_INET, IPPROTO_IP, |
IPCTL_MTUDISC, CTL_EOL); |
IPCTL_MTUDISC, CTL_EOL); |
sysctl_createv(SYSCTL_PERMANENT|SYSCTL_READWRITE, |
sysctl_createv(clog, 0, NULL, NULL, |
CTLTYPE_INT, "anonportmin", NULL, |
CTLFLAG_PERMANENT|CTLFLAG_READWRITE, |
|
CTLTYPE_INT, "anonportmin", |
|
SYSCTL_DESCR("Lowest ephemeral port number to assign"), |
sysctl_net_inet_ip_ports, 0, &anonportmin, 0, |
sysctl_net_inet_ip_ports, 0, &anonportmin, 0, |
CTL_NET, PF_INET, IPPROTO_IP, |
CTL_NET, PF_INET, IPPROTO_IP, |
IPCTL_ANONPORTMIN, CTL_EOL); |
IPCTL_ANONPORTMIN, CTL_EOL); |
sysctl_createv(SYSCTL_PERMANENT|SYSCTL_READWRITE, |
sysctl_createv(clog, 0, NULL, NULL, |
CTLTYPE_INT, "anonportmax", NULL, |
CTLFLAG_PERMANENT|CTLFLAG_READWRITE, |
|
CTLTYPE_INT, "anonportmax", |
|
SYSCTL_DESCR("Highest ephemeral port number to assign"), |
sysctl_net_inet_ip_ports, 0, &anonportmax, 0, |
sysctl_net_inet_ip_ports, 0, &anonportmax, 0, |
CTL_NET, PF_INET, IPPROTO_IP, |
CTL_NET, PF_INET, IPPROTO_IP, |
IPCTL_ANONPORTMAX, CTL_EOL); |
IPCTL_ANONPORTMAX, CTL_EOL); |
sysctl_createv(SYSCTL_PERMANENT|SYSCTL_READWRITE, |
sysctl_createv(clog, 0, NULL, NULL, |
CTLTYPE_INT, "mtudisctimeout", NULL, |
CTLFLAG_PERMANENT|CTLFLAG_READWRITE, |
|
CTLTYPE_INT, "mtudisctimeout", |
|
SYSCTL_DESCR("Lifetime of a Path MTU Discovered route"), |
sysctl_net_inet_ip_pmtudto, 0, &ip_mtudisc_timeout, 0, |
sysctl_net_inet_ip_pmtudto, 0, &ip_mtudisc_timeout, 0, |
CTL_NET, PF_INET, IPPROTO_IP, |
CTL_NET, PF_INET, IPPROTO_IP, |
IPCTL_MTUDISCTIMEOUT, CTL_EOL); |
IPCTL_MTUDISCTIMEOUT, CTL_EOL); |
#ifdef GATEWAY |
#ifdef GATEWAY |
sysctl_createv(SYSCTL_PERMANENT|SYSCTL_READWRITE, |
sysctl_createv(clog, 0, NULL, NULL, |
CTLTYPE_INT, "maxflows", NULL, |
CTLFLAG_PERMANENT|CTLFLAG_READWRITE, |
|
CTLTYPE_INT, "maxflows", |
|
SYSCTL_DESCR("Number of flows for fast forwarding"), |
sysctl_net_inet_ip_maxflows, 0, &ip_maxflows, 0, |
sysctl_net_inet_ip_maxflows, 0, &ip_maxflows, 0, |
CTL_NET, PF_INET, IPPROTO_IP, |
CTL_NET, PF_INET, IPPROTO_IP, |
IPCTL_MAXFLOWS, CTL_EOL); |
IPCTL_MAXFLOWS, CTL_EOL); |
#endif /* GATEWAY */ |
#endif /* GATEWAY */ |
sysctl_createv(SYSCTL_PERMANENT|SYSCTL_READWRITE, |
sysctl_createv(clog, 0, NULL, NULL, |
CTLTYPE_INT, "hostzerobroadcast", NULL, |
CTLFLAG_PERMANENT|CTLFLAG_READWRITE, |
|
CTLTYPE_INT, "hostzerobroadcast", |
|
SYSCTL_DESCR("All zeroes address is broadcast address"), |
NULL, 0, &hostzeroisbroadcast, 0, |
NULL, 0, &hostzeroisbroadcast, 0, |
CTL_NET, PF_INET, IPPROTO_IP, |
CTL_NET, PF_INET, IPPROTO_IP, |
IPCTL_HOSTZEROBROADCAST, CTL_EOL); |
IPCTL_HOSTZEROBROADCAST, CTL_EOL); |
#if NGIF > 0 |
#if NGIF > 0 |
sysctl_createv(SYSCTL_PERMANENT|SYSCTL_READWRITE, |
sysctl_createv(clog, 0, NULL, NULL, |
CTLTYPE_INT, "gifttl", NULL, |
CTLFLAG_PERMANENT|CTLFLAG_READWRITE, |
|
CTLTYPE_INT, "gifttl", |
|
SYSCTL_DESCR("Default TTL for a gif tunnel datagram"), |
NULL, 0, &ip_gif_ttl, 0, |
NULL, 0, &ip_gif_ttl, 0, |
CTL_NET, PF_INET, IPPROTO_IP, |
CTL_NET, PF_INET, IPPROTO_IP, |
IPCTL_GIF_TTL, CTL_EOL); |
IPCTL_GIF_TTL, CTL_EOL); |
#endif /* NGIF */ |
#endif /* NGIF */ |
#ifndef IPNOPRIVPORTS |
#ifndef IPNOPRIVPORTS |
sysctl_createv(SYSCTL_PERMANENT|SYSCTL_READWRITE, |
sysctl_createv(clog, 0, NULL, NULL, |
CTLTYPE_INT, "lowportmin", NULL, |
CTLFLAG_PERMANENT|CTLFLAG_READWRITE, |
|
CTLTYPE_INT, "lowportmin", |
|
SYSCTL_DESCR("Lowest privileged ephemeral port number " |
|
"to assign"), |
sysctl_net_inet_ip_ports, 0, &lowportmin, 0, |
sysctl_net_inet_ip_ports, 0, &lowportmin, 0, |
CTL_NET, PF_INET, IPPROTO_IP, |
CTL_NET, PF_INET, IPPROTO_IP, |
IPCTL_LOWPORTMIN, CTL_EOL); |
IPCTL_LOWPORTMIN, CTL_EOL); |
sysctl_createv(SYSCTL_PERMANENT|SYSCTL_READWRITE, |
sysctl_createv(clog, 0, NULL, NULL, |
CTLTYPE_INT, "lowportmax", NULL, |
CTLFLAG_PERMANENT|CTLFLAG_READWRITE, |
|
CTLTYPE_INT, "lowportmax", |
|
SYSCTL_DESCR("Highest privileged ephemeral port number " |
|
"to assign"), |
sysctl_net_inet_ip_ports, 0, &lowportmax, 0, |
sysctl_net_inet_ip_ports, 0, &lowportmax, 0, |
CTL_NET, PF_INET, IPPROTO_IP, |
CTL_NET, PF_INET, IPPROTO_IP, |
IPCTL_LOWPORTMAX, CTL_EOL); |
IPCTL_LOWPORTMAX, CTL_EOL); |
#endif /* IPNOPRIVPORTS */ |
#endif /* IPNOPRIVPORTS */ |
sysctl_createv(SYSCTL_PERMANENT|SYSCTL_READWRITE, |
sysctl_createv(clog, 0, NULL, NULL, |
CTLTYPE_INT, "maxfragpackets", NULL, |
CTLFLAG_PERMANENT|CTLFLAG_READWRITE, |
|
CTLTYPE_INT, "maxfragpackets", |
|
SYSCTL_DESCR("Maximum number of fragments to retain for " |
|
"possible reassembly"), |
NULL, 0, &ip_maxfragpackets, 0, |
NULL, 0, &ip_maxfragpackets, 0, |
CTL_NET, PF_INET, IPPROTO_IP, |
CTL_NET, PF_INET, IPPROTO_IP, |
IPCTL_MAXFRAGPACKETS, CTL_EOL); |
IPCTL_MAXFRAGPACKETS, CTL_EOL); |
#if NGRE > 0 |
#if NGRE > 0 |
sysctl_createv(SYSCTL_PERMANENT|SYSCTL_READWRITE, |
sysctl_createv(clog, 0, NULL, NULL, |
CTLTYPE_INT, "grettl", NULL, |
CTLFLAG_PERMANENT|CTLFLAG_READWRITE, |
|
CTLTYPE_INT, "grettl", |
|
SYSCTL_DESCR("Default TTL for a gre tunnel datagram"), |
NULL, 0, &ip_gre_ttl, 0, |
NULL, 0, &ip_gre_ttl, 0, |
CTL_NET, PF_INET, IPPROTO_IP, |
CTL_NET, PF_INET, IPPROTO_IP, |
IPCTL_GRE_TTL, CTL_EOL); |
IPCTL_GRE_TTL, CTL_EOL); |
#endif /* NGRE */ |
#endif /* NGRE */ |
sysctl_createv(SYSCTL_PERMANENT|SYSCTL_READWRITE, |
sysctl_createv(clog, 0, NULL, NULL, |
CTLTYPE_INT, "checkinterface", NULL, |
CTLFLAG_PERMANENT|CTLFLAG_READWRITE, |
|
CTLTYPE_INT, "checkinterface", |
|
SYSCTL_DESCR("Enable receive side of Strong ES model " |
|
"from RFC1122"), |
NULL, 0, &ip_checkinterface, 0, |
NULL, 0, &ip_checkinterface, 0, |
CTL_NET, PF_INET, IPPROTO_IP, |
CTL_NET, PF_INET, IPPROTO_IP, |
IPCTL_CHECKINTERFACE, CTL_EOL); |
IPCTL_CHECKINTERFACE, CTL_EOL); |
sysctl_createv(SYSCTL_PERMANENT|SYSCTL_READWRITE, |
sysctl_createv(clog, 0, NULL, NULL, |
CTLTYPE_INT, "random_id", NULL, |
CTLFLAG_PERMANENT|CTLFLAG_READWRITE, |
|
CTLTYPE_INT, "random_id", |
|
SYSCTL_DESCR("Assign random ip_id values"), |
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); |
|
sysctl_createv(clog, 0, NULL, NULL, |
|
CTLFLAG_PERMANENT|CTLFLAG_READWRITE, |
|
CTLTYPE_INT, "do_loopback_cksum", |
|
SYSCTL_DESCR("Perform IP checksum on loopback"), |
|
NULL, 0, &ip_do_loopback_cksum, 0, |
|
CTL_NET, PF_INET, IPPROTO_IP, |
|
IPCTL_LOOPBACKCKSUM, CTL_EOL); |
} |
} |