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-rw-r--r--net/ipv4/esp4.c185
-rw-r--r--net/ipv4/netfilter/ipt_LOG.c7
2 files changed, 72 insertions, 120 deletions
diff --git a/net/ipv4/esp4.c b/net/ipv4/esp4.c
index 73bfcae8af9c..09590f356086 100644
--- a/net/ipv4/esp4.c
+++ b/net/ipv4/esp4.c
@@ -12,13 +12,6 @@
12#include <net/protocol.h> 12#include <net/protocol.h>
13#include <net/udp.h> 13#include <net/udp.h>
14 14
15/* decapsulation data for use when post-processing */
16struct esp_decap_data {
17 xfrm_address_t saddr;
18 __u16 sport;
19 __u8 proto;
20};
21
22static int esp_output(struct xfrm_state *x, struct sk_buff *skb) 15static int esp_output(struct xfrm_state *x, struct sk_buff *skb)
23{ 16{
24 int err; 17 int err;
@@ -150,6 +143,10 @@ static int esp_input(struct xfrm_state *x, struct xfrm_decap_state *decap, struc
150 int elen = skb->len - sizeof(struct ip_esp_hdr) - esp->conf.ivlen - alen; 143 int elen = skb->len - sizeof(struct ip_esp_hdr) - esp->conf.ivlen - alen;
151 int nfrags; 144 int nfrags;
152 int encap_len = 0; 145 int encap_len = 0;
146 u8 nexthdr[2];
147 struct scatterlist *sg;
148 u8 workbuf[60];
149 int padlen;
153 150
154 if (!pskb_may_pull(skb, sizeof(struct ip_esp_hdr))) 151 if (!pskb_may_pull(skb, sizeof(struct ip_esp_hdr)))
155 goto out; 152 goto out;
@@ -185,122 +182,82 @@ static int esp_input(struct xfrm_state *x, struct xfrm_decap_state *decap, struc
185 if (esp->conf.ivlen) 182 if (esp->conf.ivlen)
186 crypto_cipher_set_iv(esp->conf.tfm, esph->enc_data, crypto_tfm_alg_ivsize(esp->conf.tfm)); 183 crypto_cipher_set_iv(esp->conf.tfm, esph->enc_data, crypto_tfm_alg_ivsize(esp->conf.tfm));
187 184
188 { 185 sg = &esp->sgbuf[0];
189 u8 nexthdr[2];
190 struct scatterlist *sg = &esp->sgbuf[0];
191 u8 workbuf[60];
192 int padlen;
193
194 if (unlikely(nfrags > ESP_NUM_FAST_SG)) {
195 sg = kmalloc(sizeof(struct scatterlist)*nfrags, GFP_ATOMIC);
196 if (!sg)
197 goto out;
198 }
199 skb_to_sgvec(skb, sg, sizeof(struct ip_esp_hdr) + esp->conf.ivlen, elen);
200 crypto_cipher_decrypt(esp->conf.tfm, sg, sg, elen);
201 if (unlikely(sg != &esp->sgbuf[0]))
202 kfree(sg);
203
204 if (skb_copy_bits(skb, skb->len-alen-2, nexthdr, 2))
205 BUG();
206 186
207 padlen = nexthdr[0]; 187 if (unlikely(nfrags > ESP_NUM_FAST_SG)) {
208 if (padlen+2 >= elen) 188 sg = kmalloc(sizeof(struct scatterlist)*nfrags, GFP_ATOMIC);
189 if (!sg)
209 goto out; 190 goto out;
210
211 /* ... check padding bits here. Silly. :-) */
212
213 if (x->encap && decap && decap->decap_type) {
214 struct esp_decap_data *encap_data;
215 struct udphdr *uh = (struct udphdr *) (iph+1);
216
217 encap_data = (struct esp_decap_data *) (decap->decap_data);
218 encap_data->proto = 0;
219
220 switch (decap->decap_type) {
221 case UDP_ENCAP_ESPINUDP:
222 case UDP_ENCAP_ESPINUDP_NON_IKE:
223 encap_data->proto = AF_INET;
224 encap_data->saddr.a4 = iph->saddr;
225 encap_data->sport = uh->source;
226 encap_len = (void*)esph - (void*)uh;
227 break;
228
229 default:
230 goto out;
231 }
232 }
233
234 iph->protocol = nexthdr[1];
235 pskb_trim(skb, skb->len - alen - padlen - 2);
236 memcpy(workbuf, skb->nh.raw, iph->ihl*4);
237 skb->h.raw = skb_pull(skb, sizeof(struct ip_esp_hdr) + esp->conf.ivlen);
238 skb->nh.raw += encap_len + sizeof(struct ip_esp_hdr) + esp->conf.ivlen;
239 memcpy(skb->nh.raw, workbuf, iph->ihl*4);
240 skb->nh.iph->tot_len = htons(skb->len);
241 } 191 }
192 skb_to_sgvec(skb, sg, sizeof(struct ip_esp_hdr) + esp->conf.ivlen, elen);
193 crypto_cipher_decrypt(esp->conf.tfm, sg, sg, elen);
194 if (unlikely(sg != &esp->sgbuf[0]))
195 kfree(sg);
242 196
243 return 0; 197 if (skb_copy_bits(skb, skb->len-alen-2, nexthdr, 2))
198 BUG();
244 199
245out: 200 padlen = nexthdr[0];
246 return -EINVAL; 201 if (padlen+2 >= elen)
247} 202 goto out;
248 203
249static int esp_post_input(struct xfrm_state *x, struct xfrm_decap_state *decap, struct sk_buff *skb) 204 /* ... check padding bits here. Silly. :-) */
250{
251
252 if (x->encap) {
253 struct xfrm_encap_tmpl *encap;
254 struct esp_decap_data *decap_data;
255 205
256 encap = x->encap; 206 if (x->encap) {
257 decap_data = (struct esp_decap_data *)(decap->decap_data); 207 struct xfrm_encap_tmpl *encap = x->encap;
208 struct udphdr *uh;
258 209
259 /* first, make sure that the decap type == the encap type */
260 if (encap->encap_type != decap->decap_type) 210 if (encap->encap_type != decap->decap_type)
261 return -EINVAL; 211 goto out;
262 212
263 switch (encap->encap_type) { 213 uh = (struct udphdr *)(iph + 1);
264 default: 214 encap_len = (void*)esph - (void*)uh;
265 case UDP_ENCAP_ESPINUDP: 215
266 case UDP_ENCAP_ESPINUDP_NON_IKE: 216 /*
267 /* 217 * 1) if the NAT-T peer's IP or port changed then
268 * 1) if the NAT-T peer's IP or port changed then 218 * advertize the change to the keying daemon.
269 * advertize the change to the keying daemon. 219 * This is an inbound SA, so just compare
270 * This is an inbound SA, so just compare 220 * SRC ports.
271 * SRC ports. 221 */
272 */ 222 if (iph->saddr != x->props.saddr.a4 ||
273 if (decap_data->proto == AF_INET && 223 uh->source != encap->encap_sport) {
274 (decap_data->saddr.a4 != x->props.saddr.a4 || 224 xfrm_address_t ipaddr;
275 decap_data->sport != encap->encap_sport)) { 225
276 xfrm_address_t ipaddr; 226 ipaddr.a4 = iph->saddr;
277 227 km_new_mapping(x, &ipaddr, uh->source);
278 ipaddr.a4 = decap_data->saddr.a4; 228
279 km_new_mapping(x, &ipaddr, decap_data->sport); 229 /* XXX: perhaps add an extra
280 230 * policy check here, to see
281 /* XXX: perhaps add an extra 231 * if we should allow or
282 * policy check here, to see 232 * reject a packet from a
283 * if we should allow or 233 * different source
284 * reject a packet from a 234 * address/port.
285 * different source
286 * address/port.
287 */
288 }
289
290 /*
291 * 2) ignore UDP/TCP checksums in case
292 * of NAT-T in Transport Mode, or
293 * perform other post-processing fixes
294 * as per * draft-ietf-ipsec-udp-encaps-06,
295 * section 3.1.2
296 */ 235 */
297 if (!x->props.mode)
298 skb->ip_summed = CHECKSUM_UNNECESSARY;
299
300 break;
301 } 236 }
237
238 /*
239 * 2) ignore UDP/TCP checksums in case
240 * of NAT-T in Transport Mode, or
241 * perform other post-processing fixes
242 * as per draft-ietf-ipsec-udp-encaps-06,
243 * section 3.1.2
244 */
245 if (!x->props.mode)
246 skb->ip_summed = CHECKSUM_UNNECESSARY;
302 } 247 }
248
249 iph->protocol = nexthdr[1];
250 pskb_trim(skb, skb->len - alen - padlen - 2);
251 memcpy(workbuf, skb->nh.raw, iph->ihl*4);
252 skb->h.raw = skb_pull(skb, sizeof(struct ip_esp_hdr) + esp->conf.ivlen);
253 skb->nh.raw += encap_len + sizeof(struct ip_esp_hdr) + esp->conf.ivlen;
254 memcpy(skb->nh.raw, workbuf, iph->ihl*4);
255 skb->nh.iph->tot_len = htons(skb->len);
256
303 return 0; 257 return 0;
258
259out:
260 return -EINVAL;
304} 261}
305 262
306static u32 esp4_get_max_size(struct xfrm_state *x, int mtu) 263static u32 esp4_get_max_size(struct xfrm_state *x, int mtu)
@@ -458,7 +415,6 @@ static struct xfrm_type esp_type =
458 .destructor = esp_destroy, 415 .destructor = esp_destroy,
459 .get_max_size = esp4_get_max_size, 416 .get_max_size = esp4_get_max_size,
460 .input = esp_input, 417 .input = esp_input,
461 .post_input = esp_post_input,
462 .output = esp_output 418 .output = esp_output
463}; 419};
464 420
@@ -470,15 +426,6 @@ static struct net_protocol esp4_protocol = {
470 426
471static int __init esp4_init(void) 427static int __init esp4_init(void)
472{ 428{
473 struct xfrm_decap_state decap;
474
475 if (sizeof(struct esp_decap_data) >
476 sizeof(decap.decap_data)) {
477 extern void decap_data_too_small(void);
478
479 decap_data_too_small();
480 }
481
482 if (xfrm_register_type(&esp_type, AF_INET) < 0) { 429 if (xfrm_register_type(&esp_type, AF_INET) < 0) {
483 printk(KERN_INFO "ip esp init: can't add xfrm type\n"); 430 printk(KERN_INFO "ip esp init: can't add xfrm type\n");
484 return -EAGAIN; 431 return -EAGAIN;
diff --git a/net/ipv4/netfilter/ipt_LOG.c b/net/ipv4/netfilter/ipt_LOG.c
index 6606ddb66a29..cc27545ff97f 100644
--- a/net/ipv4/netfilter/ipt_LOG.c
+++ b/net/ipv4/netfilter/ipt_LOG.c
@@ -425,7 +425,12 @@ ipt_log_target(struct sk_buff **pskb,
425 li.u.log.level = loginfo->level; 425 li.u.log.level = loginfo->level;
426 li.u.log.logflags = loginfo->logflags; 426 li.u.log.logflags = loginfo->logflags;
427 427
428 nf_log_packet(PF_INET, hooknum, *pskb, in, out, &li, loginfo->prefix); 428 if (loginfo->logflags & IPT_LOG_NFLOG)
429 nf_log_packet(PF_INET, hooknum, *pskb, in, out, &li,
430 loginfo->prefix);
431 else
432 ipt_log_packet(PF_INET, hooknum, *pskb, in, out, &li,
433 loginfo->prefix);
429 434
430 return IPT_CONTINUE; 435 return IPT_CONTINUE;
431} 436}
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-26 17:43:51 -0500