| version 1.34, 1996/09/08 15:49:43 |
version 1.35, 1996/09/09 14:51:16 |
| Line 117 static struct ip_srcrt { |
|
| Line 117 static struct ip_srcrt { |
|
| } ip_srcrt; |
} ip_srcrt; |
| |
|
| static void save_rte __P((u_char *, struct in_addr)); |
static void save_rte __P((u_char *, struct in_addr)); |
| |
|
| /* |
/* |
| * 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. |
|
|
| register struct ipq *fp; |
register struct ipq *fp; |
| register struct in_ifaddr *ia; |
register struct in_ifaddr *ia; |
| struct ipqent *ipqe; |
struct ipqent *ipqe; |
| int hlen = 0, mff, s; |
int hlen = 0, mff, len, s; |
| #ifdef PACKET_FILTER |
#ifdef PACKET_FILTER |
| struct packet_filter_hook *pfh; |
struct packet_filter_hook *pfh; |
| struct mbuf *m0; |
struct mbuf *m0; |
|
|
| * Convert fields to host representation. |
* Convert fields to host representation. |
| */ |
*/ |
| NTOHS(ip->ip_len); |
NTOHS(ip->ip_len); |
| if (ip->ip_len < hlen) { |
|
| ipstat.ips_badlen++; |
|
| goto bad; |
|
| } |
|
| NTOHS(ip->ip_id); |
NTOHS(ip->ip_id); |
| NTOHS(ip->ip_off); |
NTOHS(ip->ip_off); |
| |
len = ip->ip_len; |
| |
|
| /* |
/* |
| * Check that the amount of data in the buffers |
* Check that the amount of data in the buffers |
|
|
| * Trim mbufs if longer than we expect. |
* Trim mbufs if longer than we expect. |
| * Drop packet if shorter than we expect. |
* Drop packet if shorter than we expect. |
| */ |
*/ |
| if (m->m_pkthdr.len < ip->ip_len) { |
if (m->m_pkthdr.len < len) { |
| ipstat.ips_tooshort++; |
ipstat.ips_tooshort++; |
| goto bad; |
goto bad; |
| } |
} |
| if (m->m_pkthdr.len > ip->ip_len) { |
if (m->m_pkthdr.len > len) { |
| if (m->m_len == m->m_pkthdr.len) { |
if (m->m_len == m->m_pkthdr.len) { |
| m->m_len = ip->ip_len; |
m->m_len = len; |
| m->m_pkthdr.len = ip->ip_len; |
m->m_pkthdr.len = len; |
| } else |
} else |
| m_adj(m, ip->ip_len - m->m_pkthdr.len); |
m_adj(m, len - m->m_pkthdr.len); |
| } |
} |
| |
|
| #ifdef PACKET_FILTER |
#ifdef PACKET_FILTER |
|
|
| * Check our list of addresses, to see if the packet is for us. |
* Check our list of addresses, to see if the packet is for us. |
| */ |
*/ |
| for (ia = in_ifaddr.tqh_first; ia; ia = ia->ia_list.tqe_next) { |
for (ia = in_ifaddr.tqh_first; ia; ia = ia->ia_list.tqe_next) { |
| if (ip->ip_dst.s_addr == ia->ia_addr.sin_addr.s_addr) |
if (in_hosteq(ip->ip_dst, ia->ia_addr.sin_addr)) |
| goto ours; |
goto ours; |
| if (((ip_directedbcast == 0) || (ip_directedbcast && |
if (((ip_directedbcast == 0) || (ip_directedbcast && |
| ia->ia_ifp == m->m_pkthdr.rcvif)) && |
ia->ia_ifp == m->m_pkthdr.rcvif)) && |
| (ia->ia_ifp->if_flags & IFF_BROADCAST)) { |
(ia->ia_ifp->if_flags & IFF_BROADCAST)) { |
| if (ip->ip_dst.s_addr == ia->ia_broadaddr.sin_addr.s_addr || |
if (in_hosteq(ip->ip_dst, ia->ia_broadaddr.sin_addr) || |
| ip->ip_dst.s_addr == ia->ia_netbroadcast.s_addr || |
in_hosteq(ip->ip_dst, ia->ia_netbroadcast) || |
| /* |
/* |
| * Look for all-0's host part (old broadcast addr), |
* Look for all-0's host part (old broadcast addr), |
| * either for subnet or net. |
* either for subnet or net. |
|
|
| goto ours; |
goto ours; |
| } |
} |
| if (ip->ip_dst.s_addr == INADDR_BROADCAST || |
if (ip->ip_dst.s_addr == INADDR_BROADCAST || |
| ip->ip_dst.s_addr == INADDR_ANY) |
in_nullhost(ip->ip_dst)) |
| goto ours; |
goto ours; |
| |
|
| /* |
/* |
|
|
| */ |
*/ |
| for (fp = ipq.lh_first; fp != NULL; fp = fp->ipq_q.le_next) |
for (fp = ipq.lh_first; fp != NULL; fp = fp->ipq_q.le_next) |
| if (ip->ip_id == fp->ipq_id && |
if (ip->ip_id == fp->ipq_id && |
| ip->ip_src.s_addr == fp->ipq_src.s_addr && |
in_hosteq(ip->ip_src, fp->ipq_src) && |
| ip->ip_dst.s_addr == fp->ipq_dst.s_addr && |
in_hosteq(ip->ip_dst, fp->ipq_dst) && |
| ip->ip_p == fp->ipq_p) |
ip->ip_p == fp->ipq_p) |
| goto found; |
goto found; |
| fp = 0; |
fp = 0; |
|
|
| |
|
| sin = satosin(&ipforward_rt.ro_dst); |
sin = satosin(&ipforward_rt.ro_dst); |
| |
|
| if (ipforward_rt.ro_rt == 0 || dst.s_addr != sin->sin_addr.s_addr) { |
if (ipforward_rt.ro_rt == 0 || !in_hosteq(dst, sin->sin_addr)) { |
| if (ipforward_rt.ro_rt) { |
if (ipforward_rt.ro_rt) { |
| RTFREE(ipforward_rt.ro_rt); |
RTFREE(ipforward_rt.ro_rt); |
| ipforward_rt.ro_rt = 0; |
ipforward_rt.ro_rt = 0; |
| Line 1041 ip_forward(m, srcrt) |
|
| Line 1039 ip_forward(m, srcrt) |
|
| #ifdef DIAGNOSTIC |
#ifdef DIAGNOSTIC |
| if (ipprintfs) |
if (ipprintfs) |
| printf("forward: src %x dst %x ttl %x\n", |
printf("forward: src %x dst %x ttl %x\n", |
| ip->ip_src.s_addr, ip->ip_dst.s_addr, ip->ip_ttl); |
ip->ip_src.s_addr, ip->ip_dst.s_addr, ip->ip_ttl); |
| #endif |
#endif |
| if (m->m_flags & M_BCAST || in_canforward(ip->ip_dst) == 0) { |
if (m->m_flags & M_BCAST || in_canforward(ip->ip_dst) == 0) { |
| ipstat.ips_cantforward++; |
ipstat.ips_cantforward++; |
| Line 1057 ip_forward(m, srcrt) |
|
| Line 1055 ip_forward(m, srcrt) |
|
| |
|
| sin = satosin(&ipforward_rt.ro_dst); |
sin = satosin(&ipforward_rt.ro_dst); |
| if ((rt = ipforward_rt.ro_rt) == 0 || |
if ((rt = ipforward_rt.ro_rt) == 0 || |
| ip->ip_dst.s_addr != sin->sin_addr.s_addr) { |
!in_hosteq(ip->ip_dst, sin->sin_addr)) { |
| if (ipforward_rt.ro_rt) { |
if (ipforward_rt.ro_rt) { |
| RTFREE(ipforward_rt.ro_rt); |
RTFREE(ipforward_rt.ro_rt); |
| ipforward_rt.ro_rt = 0; |
ipforward_rt.ro_rt = 0; |
| } |
} |
| sin->sin_family = AF_INET; |
sin->sin_family = AF_INET; |
| sin->sin_len = sizeof(*sin); |
sin->sin_len = sizeof(struct sockaddr_in); |
| sin->sin_addr = ip->ip_dst; |
sin->sin_addr = ip->ip_dst; |
| |
|
| rtalloc(&ipforward_rt); |
rtalloc(&ipforward_rt); |
| Line 1090 ip_forward(m, srcrt) |
|
| Line 1088 ip_forward(m, srcrt) |
|
| */ |
*/ |
| if (rt->rt_ifp == m->m_pkthdr.rcvif && |
if (rt->rt_ifp == m->m_pkthdr.rcvif && |
| (rt->rt_flags & (RTF_DYNAMIC|RTF_MODIFIED)) == 0 && |
(rt->rt_flags & (RTF_DYNAMIC|RTF_MODIFIED)) == 0 && |
| satosin(rt_key(rt))->sin_addr.s_addr != 0 && |
!in_nullhost(satosin(rt_key(rt))->sin_addr) && |
| ipsendredirects && !srcrt) { |
ipsendredirects && !srcrt) { |
| if (rt->rt_ifa && |
if (rt->rt_ifa && |
| (ip->ip_src.s_addr & ifatoia(rt->rt_ifa)->ia_subnetmask) == |
(ip->ip_src.s_addr & ifatoia(rt->rt_ifa)->ia_subnetmask) == |
| Line 1104 ip_forward(m, srcrt) |
|
| Line 1102 ip_forward(m, srcrt) |
|
| code = ICMP_REDIRECT_HOST; |
code = ICMP_REDIRECT_HOST; |
| #ifdef DIAGNOSTIC |
#ifdef DIAGNOSTIC |
| if (ipprintfs) |
if (ipprintfs) |
| printf("redirect (%d) to %x\n", code, (u_int32_t)dest); |
printf("redirect (%d) to %x\n", code, (u_int32_t)dest); |
| #endif |
#endif |
| } |
} |
| } |
} |