* 2000-08-06: Convert to new helper API (Harald Welte).
*
*/
-#include <linux/config.h>
#include <linux/in.h>
#include <linux/module.h>
#include <linux/types.h>
#define SNMP_PORT 161
#define SNMP_TRAP_PORT 162
-#define NOCT1(n) (u_int8_t )((n) & 0xff)
+#define NOCT1(n) (*(u8 *)n)
static int debug;
static DEFINE_SPINLOCK(snmp_lock);
if (!asn1_id_decode(ctx, cls, con, tag))
return 0;
+ def = len = 0;
if (!asn1_length_decode(ctx, &def, &len))
return 0;
static inline void mangle_address(unsigned char *begin,
unsigned char *addr,
const struct oct1_map *map,
- u_int16_t *check);
+ __sum16 *check);
struct snmp_cnv
{
unsigned int class;
unsigned char *eoc, *end, *p;
unsigned long *lp, *id;
unsigned long ul;
- long l;
+ long l;
*obj = NULL;
id = NULL;
return 0;
}
+ type = 0;
if (!snmp_tag_cls2syntax(tag, cls, &type)) {
kfree(id);
return 0;
}
+ l = 0;
switch (type) {
case SNMP_INTEGER:
len = sizeof(long);
len *= sizeof(unsigned long);
*obj = kmalloc(sizeof(struct snmp_object) + len, GFP_ATOMIC);
if (*obj == NULL) {
+ kfree(lp);
kfree(id);
if (net_ratelimit())
printk("OOM in bsalg (%d)\n", __LINE__);
* Fast checksum update for possibly oddly-aligned UDP byte, from the
* code example in the draft.
*/
-static void fast_csum(unsigned char *csum,
+static void fast_csum(__sum16 *csum,
const unsigned char *optr,
const unsigned char *nptr,
- int odd)
+ int offset)
{
- long x, old, new;
-
- x = csum[0] * 256 + csum[1];
-
- x =~ x & 0xFFFF;
-
- if (odd) old = optr[0] * 256;
- else old = optr[0];
-
- x -= old & 0xFFFF;
- if (x <= 0) {
- x--;
- x &= 0xFFFF;
- }
-
- if (odd) new = nptr[0] * 256;
- else new = nptr[0];
-
- x += new & 0xFFFF;
- if (x & 0x10000) {
- x++;
- x &= 0xFFFF;
+ unsigned char s[4];
+
+ if (offset & 1) {
+ s[0] = s[2] = 0;
+ s[1] = ~*optr;
+ s[3] = *nptr;
+ } else {
+ s[1] = s[3] = 0;
+ s[0] = ~*optr;
+ s[2] = *nptr;
}
-
- x =~ x & 0xFFFF;
- csum[0] = x / 256;
- csum[1] = x & 0xFF;
+
+ *csum = csum_fold(csum_partial(s, 4, ~csum_unfold(*csum)));
}
/*
static inline void mangle_address(unsigned char *begin,
unsigned char *addr,
const struct oct1_map *map,
- u_int16_t *check)
+ __sum16 *check)
{
- if (map->from == NOCT1(*addr)) {
+ if (map->from == NOCT1(addr)) {
u_int32_t old;
if (debug)
/* Update UDP checksum if being used */
if (*check) {
- unsigned char odd = !((addr - begin) % 2);
-
- fast_csum((unsigned char *)check,
- &map->from, &map->to, odd);
-
+ fast_csum(check,
+ &map->from, &map->to, addr - begin);
}
if (debug)
static unsigned char snmp_trap_decode(struct asn1_ctx *ctx,
struct snmp_v1_trap *trap,
const struct oct1_map *map,
- u_int16_t *check)
+ __sum16 *check)
{
unsigned int cls, con, tag, len;
unsigned char *end;
static int snmp_parse_mangle(unsigned char *msg,
u_int16_t len,
const struct oct1_map *map,
- u_int16_t *check)
+ __sum16 *check)
{
unsigned char *eoc, *end;
unsigned int cls, con, tag, vers, pdutype;
struct sk_buff **pskb)
{
struct iphdr *iph = (*pskb)->nh.iph;
- struct udphdr *udph = (struct udphdr *)((u_int32_t *)iph + iph->ihl);
+ struct udphdr *udph = (struct udphdr *)((__be32 *)iph + iph->ihl);
u_int16_t udplen = ntohs(udph->len);
u_int16_t paylen = udplen - sizeof(struct udphdr);
int dir = CTINFO2DIR(ctinfo);
*/
if (dir == IP_CT_DIR_ORIGINAL) {
/* SNAT traps */
- map.from = NOCT1(ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.src.ip);
- map.to = NOCT1(ct->tuplehash[IP_CT_DIR_REPLY].tuple.dst.ip);
+ map.from = NOCT1(&ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.src.ip);
+ map.to = NOCT1(&ct->tuplehash[IP_CT_DIR_REPLY].tuple.dst.ip);
} else {
/* DNAT replies */
- map.from = NOCT1(ct->tuplehash[IP_CT_DIR_REPLY].tuple.src.ip);
- map.to = NOCT1(ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.dst.ip);
+ map.from = NOCT1(&ct->tuplehash[IP_CT_DIR_REPLY].tuple.src.ip);
+ map.to = NOCT1(&ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.dst.ip);
}
if (map.from == map.to)
struct udphdr *udph = (struct udphdr *)((u_int32_t *)iph + iph->ihl);
/* SNMP replies and originating SNMP traps get mangled */
- if (udph->source == ntohs(SNMP_PORT) && dir != IP_CT_DIR_REPLY)
+ if (udph->source == htons(SNMP_PORT) && dir != IP_CT_DIR_REPLY)
return NF_ACCEPT;
- if (udph->dest == ntohs(SNMP_TRAP_PORT) && dir != IP_CT_DIR_ORIGINAL)
+ if (udph->dest == htons(SNMP_TRAP_PORT) && dir != IP_CT_DIR_ORIGINAL)
return NF_ACCEPT;
/* No NAT? */
.help = help,
.name = "snmp",
- .tuple = { .src = { .u = { __constant_htons(SNMP_PORT) } },
- .dst = { .protonum = IPPROTO_UDP },
+ .tuple = {.src = {.u = {.udp = {.port = __constant_htons(SNMP_PORT)}}},
+ .dst = {.protonum = IPPROTO_UDP},
},
- .mask = { .src = { .u = { 0xFFFF } },
- .dst = { .protonum = 0xFF },
+ .mask = {.src = {.u = {0xFFFF}},
+ .dst = {.protonum = 0xFF},
},
};
.help = help,
.name = "snmp_trap",
- .tuple = { .src = { .u = { __constant_htons(SNMP_TRAP_PORT) } },
- .dst = { .protonum = IPPROTO_UDP },
+ .tuple = {.src = {.u = {.udp = {.port = __constant_htons(SNMP_TRAP_PORT)}}},
+ .dst = {.protonum = IPPROTO_UDP},
},
- .mask = { .src = { .u = { 0xFFFF } },
- .dst = { .protonum = 0xFF },
+ .mask = {.src = {.u = {0xFFFF}},
+ .dst = {.protonum = 0xFF},
},
};
*
*****************************************************************************/
-static int __init init(void)
+static int __init ip_nat_snmp_basic_init(void)
{
int ret = 0;
return ret;
}
-static void __exit fini(void)
+static void __exit ip_nat_snmp_basic_fini(void)
{
ip_conntrack_helper_unregister(&snmp_helper);
ip_conntrack_helper_unregister(&snmp_trap_helper);
}
-module_init(init);
-module_exit(fini);
+module_init(ip_nat_snmp_basic_init);
+module_exit(ip_nat_snmp_basic_fini);
-module_param(debug, bool, 0600);
+module_param(debug, int, 0600);
git://git.onelab.eu / linux-2.6.git / blobdiff