rmnet_perf_tcp.c 17 KB

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  1. // SPDX-License-Identifier: GPL-2.0-only
  2. /* Copyright (c) 2023 Qualcomm Innovation Center, Inc. All rights reserved.
  3. *
  4. * RMNET PERF TCP framework
  5. *
  6. */
  7. #include <linux/types.h>
  8. #include <linux/module.h>
  9. #include <linux/moduleparam.h>
  10. #include <linux/skbuff.h>
  11. #include <linux/spinlock.h>
  12. #include <linux/rcupdate.h>
  13. #include <linux/hashtable.h>
  14. #include <linux/log2.h>
  15. #include <linux/workqueue.h>
  16. #include <net/ip.h>
  17. #include <net/inet_hashtables.h>
  18. #include <net/ipv6.h>
  19. #include <net/inet6_hashtables.h>
  20. #include <net/tcp.h>
  21. #include <net/sock.h>
  22. #include "rmnet_private.h"
  23. #include "rmnet_perf_tcp.h"
  24. #define DATARMNET3dad3dfdc0 ((0x16a8+1565-0x14f5))
  25. #define DATARMNETe6309522cf ((0xdf7+6169-0x241c))
  26. #define DATARMNET99a2e6e390 (192000)
  27. #define DATARMNET714c9c3081 ((0xeb7+1158-0x132d))
  28. #define DATARMNET347bd5eb15 \
  29. (const_ilog2(DATARMNET714c9c3081))
  30. enum{DATARMNETe0e37fef7a,DATARMNETf354672897,DATARMNET9cc765a89e,
  31. DATARMNETb03f9571a3,DATARMNET53c8cfb28e,DATARMNET74f0a28fec,DATARMNETaa18c75b61,
  32. };struct DATARMNET4b40fe9cd4{union{__be32 DATARMNETdfe430c2d6;struct in6_addr
  33. DATARMNET815cbb4bf5;};union{__be32 DATARMNET2cb607d686;struct in6_addr
  34. DATARMNETc3f31215b7;};union{struct{__be16 DATARMNET08e913477e;__be16
  35. DATARMNETda7f7fa492;};u32 DATARMNET556bcfcf8f;};u8 DATARMNET0d956cc77a;};struct
  36. DATARMNETddbc1e5435{struct hlist_node hash;struct rcu_head DATARMNET28bfe9e6ad;
  37. struct DATARMNET4b40fe9cd4 DATARMNET54338da2ff;unsigned long DATARMNET763f2e5fac
  38. ;u32 DATARMNETfef3675ce7;u32 DATARMNET9076d335ab;u32 DATARMNET9c389f3b86;u32
  39. DATARMNET9a57846b4e;u32 DATARMNETb8fc35ed64;bool DATARMNET55056146f6;u8
  40. DATARMNET1717afebc7;};struct DATARMNET74cfea3d20{struct delayed_work
  41. DATARMNET190b4452e8;bool DATARMNETcd94e0d3c7;};static DEFINE_SPINLOCK(
  42. DATARMNET8e3721c47d);static DEFINE_HASHTABLE(DATARMNET1fd012f255,
  43. DATARMNET347bd5eb15);static u32 DATARMNET1c62a8e2c9;static struct
  44. DATARMNET74cfea3d20 DATARMNETac6535da80;static u32 DATARMNET84337b8855=
  45. (0xeb7+698-0x110d);module_param_named(rmnet_perf_tcp_knob0,DATARMNET84337b8855,
  46. uint,(0xdb7+6665-0x261c));static u64 DATARMNETeb09e391b5[DATARMNETaa18c75b61];
  47. module_param_array_named(rmnet_perf_tcp_stat,DATARMNETeb09e391b5,ullong,NULL,
  48. (0xcb7+5769-0x221c));static void DATARMNET32b91c8ae6(u32 DATARMNET248f120dd5){if
  49. (DATARMNET248f120dd5<DATARMNETaa18c75b61)DATARMNETeb09e391b5[DATARMNET248f120dd5
  50. ]+=(0xd26+209-0xdf6);}static bool DATARMNETd92eab34a9(struct DATARMNETddbc1e5435
  51. *DATARMNET63b1a086d5,unsigned long DATARMNET763f2e5fac){unsigned long
  52. DATARMNETc2d5c71ce1;DATARMNETc2d5c71ce1=msecs_to_jiffies(DATARMNET3dad3dfdc0);if
  53. (DATARMNET763f2e5fac-DATARMNET63b1a086d5->DATARMNET763f2e5fac>
  54. DATARMNETc2d5c71ce1)return true;return false;}static void DATARMNET776e08992c(
  55. struct rcu_head*DATARMNET5d432e897f){struct DATARMNETddbc1e5435*
  56. DATARMNET63b1a086d5;DATARMNET63b1a086d5=container_of(DATARMNET5d432e897f,struct
  57. DATARMNETddbc1e5435,DATARMNET28bfe9e6ad);kfree(DATARMNET63b1a086d5);}static bool
  58. DATARMNETb8167597bc(bool DATARMNETe78ad140cc){struct DATARMNETddbc1e5435*
  59. DATARMNET63b1a086d5;struct hlist_node*DATARMNET0386f6f82a;unsigned long
  60. DATARMNET763f2e5fac;int DATARMNET5c2fd31d7b;DATARMNET763f2e5fac=jiffies;
  61. hash_for_each_safe(DATARMNET1fd012f255,DATARMNET5c2fd31d7b,DATARMNET0386f6f82a,
  62. DATARMNET63b1a086d5,hash){if(DATARMNET63b1a086d5->DATARMNET1717afebc7)continue;
  63. if(DATARMNETe78ad140cc||DATARMNETd92eab34a9(DATARMNET63b1a086d5,
  64. DATARMNET763f2e5fac)){DATARMNET63b1a086d5->DATARMNET1717afebc7=true;hash_del_rcu
  65. (&DATARMNET63b1a086d5->hash);call_rcu(&DATARMNET63b1a086d5->DATARMNET28bfe9e6ad,
  66. DATARMNET776e08992c);DATARMNET32b91c8ae6(DATARMNET9cc765a89e);
  67. DATARMNET1c62a8e2c9--;}}return!!DATARMNET1c62a8e2c9;}static void
  68. DATARMNETfec9085d8e(struct work_struct*DATARMNET190b4452e8){struct
  69. DATARMNET74cfea3d20*DATARMNET9dd153bdf2;unsigned long DATARMNETfb0677cc3c;bool
  70. DATARMNET6e1c466378;DATARMNET9dd153bdf2=container_of(to_delayed_work(
  71. DATARMNET190b4452e8),struct DATARMNET74cfea3d20,DATARMNET190b4452e8);
  72. spin_lock_irqsave(&DATARMNET8e3721c47d,DATARMNETfb0677cc3c);DATARMNET6e1c466378=
  73. DATARMNETb8167597bc(DATARMNET9dd153bdf2->DATARMNETcd94e0d3c7);if(
  74. DATARMNET6e1c466378){unsigned long DATARMNETf71ef1b8da;DATARMNETf71ef1b8da=
  75. msecs_to_jiffies(DATARMNETe6309522cf);schedule_delayed_work(&DATARMNET9dd153bdf2
  76. ->DATARMNET190b4452e8,DATARMNETf71ef1b8da);}spin_unlock_irqrestore(&
  77. DATARMNET8e3721c47d,DATARMNETfb0677cc3c);}static bool DATARMNET2f1039220d(struct
  78. DATARMNET4b40fe9cd4*DATARMNETae0905b0b3,struct DATARMNET4b40fe9cd4*
  79. DATARMNETdb49f21565){if(DATARMNETae0905b0b3->DATARMNET0d956cc77a!=
  80. DATARMNETdb49f21565->DATARMNET0d956cc77a||DATARMNETae0905b0b3->
  81. DATARMNET08e913477e!=DATARMNETdb49f21565->DATARMNET08e913477e||
  82. DATARMNETae0905b0b3->DATARMNETda7f7fa492!=DATARMNETdb49f21565->
  83. DATARMNETda7f7fa492)return false;if(DATARMNETae0905b0b3->DATARMNET0d956cc77a==
  84. (0xd11+230-0xdf3))return DATARMNETae0905b0b3->DATARMNETdfe430c2d6==
  85. DATARMNETdb49f21565->DATARMNETdfe430c2d6&&DATARMNETae0905b0b3->
  86. DATARMNET2cb607d686==DATARMNETdb49f21565->DATARMNET2cb607d686;return!
  87. ipv6_addr_cmp(&DATARMNETae0905b0b3->DATARMNET815cbb4bf5,&DATARMNETdb49f21565->
  88. DATARMNET815cbb4bf5)&&!ipv6_addr_cmp(&DATARMNETae0905b0b3->DATARMNETc3f31215b7,&
  89. DATARMNETdb49f21565->DATARMNETc3f31215b7);}static struct DATARMNETddbc1e5435*
  90. DATARMNETba919c78e5(struct DATARMNET4b40fe9cd4*DATARMNET3396919a68)__must_hold(&
  91. DATARMNET8e3721c47d){struct DATARMNETddbc1e5435*DATARMNET63b1a086d5;if(
  92. DATARMNET1c62a8e2c9>=DATARMNET84337b8855)return NULL;DATARMNET63b1a086d5=kzalloc
  93. (sizeof(*DATARMNET63b1a086d5),GFP_ATOMIC);if(!DATARMNET63b1a086d5){
  94. DATARMNET32b91c8ae6(DATARMNETf354672897);return NULL;}INIT_HLIST_NODE(&
  95. DATARMNET63b1a086d5->hash);memcpy(&DATARMNET63b1a086d5->DATARMNET54338da2ff,
  96. DATARMNET3396919a68,sizeof(*DATARMNET3396919a68));DATARMNET63b1a086d5->
  97. DATARMNET9a57846b4e=DATARMNET99a2e6e390;DATARMNET63b1a086d5->DATARMNET763f2e5fac
  98. =jiffies;hash_add_rcu(DATARMNET1fd012f255,&DATARMNET63b1a086d5->hash,
  99. DATARMNET3396919a68->DATARMNET556bcfcf8f);DATARMNET32b91c8ae6(
  100. DATARMNETe0e37fef7a);if(!DATARMNET1c62a8e2c9){unsigned long DATARMNETf71ef1b8da;
  101. DATARMNETf71ef1b8da=msecs_to_jiffies(DATARMNETe6309522cf);schedule_delayed_work(
  102. &DATARMNETac6535da80.DATARMNET190b4452e8,DATARMNETf71ef1b8da);}
  103. DATARMNET1c62a8e2c9++;return DATARMNET63b1a086d5;}static void
  104. DATARMNET11a5f0fd38(struct DATARMNETddbc1e5435*DATARMNET63b1a086d5,struct
  105. sk_buff*DATARMNET543491eb0f,bool DATARMNETd147c14c0e)__must_hold(RCU){struct
  106. tcphdr*DATARMNET668416551c=tcp_hdr(DATARMNET543491eb0f);struct rmnet_skb_cb*
  107. DATARMNET1ec4882bf7=RMNET_SKB_CB(DATARMNET543491eb0f);DATARMNET63b1a086d5->
  108. DATARMNET9c389f3b86=DATARMNET543491eb0f->hash;if(DATARMNETd147c14c0e){u32
  109. DATARMNET9076d335ab=ntohl(DATARMNET668416551c->ack_seq);WRITE_ONCE(
  110. DATARMNET63b1a086d5->DATARMNET9076d335ab,DATARMNET9076d335ab);WRITE_ONCE(
  111. DATARMNET63b1a086d5->DATARMNETfef3675ce7,DATARMNET9076d335ab);}else{u32
  112. DATARMNETfef3675ce7=ntohl(DATARMNET668416551c->seq);WRITE_ONCE(
  113. DATARMNET63b1a086d5->DATARMNETfef3675ce7,DATARMNETfef3675ce7);WRITE_ONCE(
  114. DATARMNET63b1a086d5->DATARMNET9076d335ab,DATARMNETfef3675ce7-(0xd26+209-0xdf6));
  115. DATARMNET1ec4882bf7->bif=(0xd2d+202-0xdf7);DATARMNET1ec4882bf7->ack_thresh=
  116. READ_ONCE(DATARMNET63b1a086d5->DATARMNET9a57846b4e);}}static struct
  117. DATARMNETddbc1e5435*DATARMNET9f0aaf07cc(struct DATARMNET4b40fe9cd4*
  118. DATARMNET3396919a68,struct sk_buff*DATARMNET543491eb0f,bool DATARMNETd147c14c0e)
  119. __must_hold(RCU){struct DATARMNETddbc1e5435*DATARMNET63b1a086d5;unsigned long
  120. DATARMNETfb0677cc3c;spin_lock_irqsave(&DATARMNET8e3721c47d,DATARMNETfb0677cc3c);
  121. hash_for_each_possible_rcu(DATARMNET1fd012f255,DATARMNET63b1a086d5,hash,
  122. DATARMNET3396919a68->DATARMNET556bcfcf8f){if(DATARMNET63b1a086d5->
  123. DATARMNET1717afebc7)continue;if(DATARMNET2f1039220d(&DATARMNET63b1a086d5->
  124. DATARMNET54338da2ff,DATARMNET3396919a68)){spin_unlock_irqrestore(&
  125. DATARMNET8e3721c47d,DATARMNETfb0677cc3c);return DATARMNET63b1a086d5;}}
  126. DATARMNET63b1a086d5=DATARMNETba919c78e5(DATARMNET3396919a68);
  127. spin_unlock_irqrestore(&DATARMNET8e3721c47d,DATARMNETfb0677cc3c);if(
  128. DATARMNET63b1a086d5)DATARMNET11a5f0fd38(DATARMNET63b1a086d5,DATARMNET543491eb0f,
  129. DATARMNETd147c14c0e);return DATARMNET63b1a086d5;}static struct sock*
  130. DATARMNETc0b5d624ae(struct DATARMNET4b40fe9cd4*DATARMNET3396919a68,struct
  131. net_device*DATARMNETc96400be1e){struct net*net=dev_net(DATARMNETc96400be1e);if(
  132. DATARMNET3396919a68->DATARMNET0d956cc77a==(0xd11+230-0xdf3))return
  133. inet_lookup_established(net,&tcp_hashinfo,DATARMNET3396919a68->
  134. DATARMNETdfe430c2d6,DATARMNET3396919a68->DATARMNET08e913477e,DATARMNET3396919a68
  135. ->DATARMNET2cb607d686,DATARMNET3396919a68->DATARMNETda7f7fa492,
  136. DATARMNETc96400be1e->ifindex);return __inet6_lookup_established(net,&
  137. tcp_hashinfo,&DATARMNET3396919a68->DATARMNET815cbb4bf5,DATARMNET3396919a68->
  138. DATARMNET08e913477e,&DATARMNET3396919a68->DATARMNETc3f31215b7,ntohs(
  139. DATARMNET3396919a68->DATARMNETda7f7fa492),DATARMNETc96400be1e->ifindex,
  140. (0xd2d+202-0xdf7));}static void DATARMNET31a7673e56(struct DATARMNETddbc1e5435*
  141. DATARMNET63b1a086d5,struct sk_buff*DATARMNET543491eb0f)__must_hold(RCU){struct
  142. sock*sk;if(DATARMNET543491eb0f->sk){sk=DATARMNET543491eb0f->sk;if(sk_fullsock(sk
  143. )){if(sk->sk_state==TCP_ESTABLISHED&&!sock_flag(sk,SOCK_DEAD)&&!sk_unhashed(sk)
  144. &&sk->sk_shutdown!=SHUTDOWN_MASK){inet_csk(sk)->icsk_ack.pending|=ICSK_ACK_NOW;
  145. DATARMNET63b1a086d5->DATARMNETb8fc35ed64++;DATARMNET32b91c8ae6(
  146. DATARMNET74f0a28fec);}}return;}sk=DATARMNETc0b5d624ae(&DATARMNET63b1a086d5->
  147. DATARMNET54338da2ff,DATARMNET543491eb0f->dev);if(!sk){struct rmnet_skb_cb*
  148. DATARMNET1ec4882bf7=RMNET_SKB_CB(DATARMNET543491eb0f);DATARMNET32b91c8ae6(
  149. DATARMNETb03f9571a3);DATARMNET63b1a086d5->DATARMNET55056146f6=true;
  150. DATARMNET1ec4882bf7->tethered=true;return;}if(sk_fullsock(sk)){bh_lock_sock(sk);
  151. if(sk->sk_state==TCP_ESTABLISHED&&!sock_flag(sk,SOCK_DEAD)&&!sk_unhashed(sk)&&sk
  152. ->sk_shutdown!=SHUTDOWN_MASK){inet_csk(sk)->icsk_ack.pending|=ICSK_ACK_NOW;
  153. inet_csk_schedule_ack(sk);DATARMNET63b1a086d5->DATARMNETb8fc35ed64++;
  154. DATARMNET32b91c8ae6(DATARMNET53c8cfb28e);}bh_unlock_sock(sk);}sock_gen_put(sk);}
  155. static u32 DATARMNET62fb576113(struct sk_buff*DATARMNET543491eb0f){struct tcphdr
  156. *DATARMNET668416551c=tcp_hdr(DATARMNET543491eb0f);return DATARMNET543491eb0f->
  157. len-((u8*)DATARMNET668416551c-DATARMNET543491eb0f->data)-DATARMNET668416551c->
  158. doff*(0xd11+230-0xdf3);}static void DATARMNET55fda9e01e(struct
  159. DATARMNETddbc1e5435*DATARMNET63b1a086d5,struct sk_buff*DATARMNET543491eb0f,bool
  160. DATARMNETd147c14c0e)__must_hold(RCU){struct tcphdr*DATARMNET668416551c=tcp_hdr(
  161. DATARMNET543491eb0f);u32 DATARMNET26945497d8=ntohl(DATARMNET668416551c->seq);u32
  162. DATARMNETb1b0ee1b2d=ntohl(DATARMNET668416551c->ack_seq);u32 DATARMNETb6ff6d25f8
  163. =READ_ONCE(DATARMNET63b1a086d5->DATARMNETfef3675ce7);u32 DATARMNET91c1d5c029=
  164. READ_ONCE(DATARMNET63b1a086d5->DATARMNET9076d335ab);u32 DATARMNET9445bc443c=
  165. READ_ONCE(DATARMNET63b1a086d5->DATARMNET9a57846b4e);DATARMNET63b1a086d5->
  166. DATARMNET763f2e5fac=jiffies;if(DATARMNET63b1a086d5->DATARMNET55056146f6)return;
  167. if(DATARMNETd147c14c0e){if(after(DATARMNETb1b0ee1b2d,DATARMNET91c1d5c029)){u32
  168. DATARMNET4e557c82d6=(0xd2d+202-0xdf7);if(DATARMNETb1b0ee1b2d>DATARMNETb6ff6d25f8
  169. )DATARMNET4e557c82d6=DATARMNETb1b0ee1b2d-DATARMNETb6ff6d25f8;if(
  170. DATARMNET4e557c82d6>DATARMNET9445bc443c)DATARMNET31a7673e56(DATARMNET63b1a086d5,
  171. DATARMNET543491eb0f);WRITE_ONCE(DATARMNET63b1a086d5->DATARMNET9076d335ab,
  172. DATARMNETb1b0ee1b2d);}}else{u32 DATARMNET4e557c82d6;if(after(DATARMNET26945497d8
  173. ,DATARMNETb6ff6d25f8)){DATARMNET4e557c82d6=DATARMNET26945497d8-
  174. DATARMNET91c1d5c029;DATARMNET4e557c82d6+=DATARMNET62fb576113(DATARMNET543491eb0f
  175. );if(DATARMNET4e557c82d6>DATARMNET9445bc443c)DATARMNET31a7673e56(
  176. DATARMNET63b1a086d5,DATARMNET543491eb0f);WRITE_ONCE(DATARMNET63b1a086d5->
  177. DATARMNETfef3675ce7,DATARMNET26945497d8);}}}static bool DATARMNET6670717310(
  178. struct sk_buff*DATARMNET543491eb0f,struct DATARMNET4b40fe9cd4*
  179. DATARMNET3396919a68){struct tcphdr*DATARMNET668416551c;u32 DATARMNETd660a1a629;
  180. if(!skb_transport_header_was_set(DATARMNET543491eb0f)||DATARMNET543491eb0f->
  181. ip_summed==CHECKSUM_NONE)return false;DATARMNET668416551c=tcp_hdr(
  182. DATARMNET543491eb0f);if(DATARMNET668416551c->syn)return false;
  183. DATARMNETd660a1a629=DATARMNET62fb576113(DATARMNET543491eb0f);if(!
  184. DATARMNETd660a1a629&&DATARMNET668416551c->ack)return false;DATARMNET3396919a68->
  185. DATARMNET08e913477e=DATARMNET668416551c->source;DATARMNET3396919a68->
  186. DATARMNETda7f7fa492=DATARMNET668416551c->dest;if(DATARMNET543491eb0f->protocol==
  187. htons(ETH_P_IP)){struct iphdr*DATARMNET86f1f2cdc9=ip_hdr(DATARMNET543491eb0f);
  188. DATARMNET3396919a68->DATARMNETdfe430c2d6=DATARMNET86f1f2cdc9->saddr;
  189. DATARMNET3396919a68->DATARMNET2cb607d686=DATARMNET86f1f2cdc9->daddr;
  190. DATARMNET3396919a68->DATARMNET0d956cc77a=(0xd11+230-0xdf3);}else{struct ipv6hdr*
  191. DATARMNETbf55123e5b=ipv6_hdr(DATARMNET543491eb0f);memcpy(&DATARMNET3396919a68->
  192. DATARMNET815cbb4bf5,&DATARMNETbf55123e5b->saddr,sizeof(DATARMNETbf55123e5b->
  193. saddr));memcpy(&DATARMNET3396919a68->DATARMNETc3f31215b7,&DATARMNETbf55123e5b->
  194. daddr,sizeof(DATARMNETbf55123e5b->daddr));DATARMNET3396919a68->
  195. DATARMNET0d956cc77a=(0xd03+244-0xdf1);}return true;}void DATARMNET9250714999(
  196. struct sk_buff*DATARMNET543491eb0f){struct rmnet_skb_cb*DATARMNET1ec4882bf7=
  197. RMNET_SKB_CB(DATARMNET543491eb0f);struct DATARMNET4b40fe9cd4 DATARMNET3396919a68
  198. ={};struct DATARMNETddbc1e5435*DATARMNET63b1a086d5;if(!DATARMNET6670717310(
  199. DATARMNET543491eb0f,&DATARMNET3396919a68))return;rcu_read_lock();
  200. DATARMNET63b1a086d5=DATARMNET9f0aaf07cc(&DATARMNET3396919a68,DATARMNET543491eb0f
  201. ,false);if(!DATARMNET63b1a086d5)goto DATARMNETbf4095f79e;if(unlikely(
  202. DATARMNETd92eab34a9(DATARMNET63b1a086d5,jiffies)))goto DATARMNETbf4095f79e;if(
  203. DATARMNET63b1a086d5->DATARMNET55056146f6){DATARMNET1ec4882bf7->tethered=true;}
  204. else{u32 DATARMNET4e557c82d6=READ_ONCE(DATARMNET63b1a086d5->DATARMNETfef3675ce7)
  205. -READ_ONCE(DATARMNET63b1a086d5->DATARMNET9076d335ab);DATARMNET1ec4882bf7->bif=
  206. DATARMNET4e557c82d6;DATARMNET1ec4882bf7->ack_thresh=READ_ONCE(
  207. DATARMNET63b1a086d5->DATARMNET9a57846b4e);DATARMNET1ec4882bf7->ack_forced=
  208. DATARMNET63b1a086d5->DATARMNETb8fc35ed64;}DATARMNETbf4095f79e:rcu_read_unlock();
  209. }void DATARMNETd8fdde8978(struct sk_buff*DATARMNET543491eb0f){struct
  210. DATARMNET4b40fe9cd4 DATARMNET3396919a68={};struct DATARMNETddbc1e5435*
  211. DATARMNET63b1a086d5;if(!DATARMNET6670717310(DATARMNET543491eb0f,&
  212. DATARMNET3396919a68))return;rcu_read_lock();DATARMNET63b1a086d5=
  213. DATARMNET9f0aaf07cc(&DATARMNET3396919a68,DATARMNET543491eb0f,false);if(
  214. DATARMNET63b1a086d5){if(likely(!DATARMNETd92eab34a9(DATARMNET63b1a086d5,jiffies)
  215. ))DATARMNET55fda9e01e(DATARMNET63b1a086d5,DATARMNET543491eb0f,false);}
  216. rcu_read_unlock();}void DATARMNET9d574e64b1(struct sk_buff*DATARMNET543491eb0f){
  217. struct DATARMNET4b40fe9cd4 DATARMNET3396919a68={};struct DATARMNETddbc1e5435*
  218. DATARMNET63b1a086d5;struct tcphdr*DATARMNET668416551c;u32 DATARMNETd660a1a629;if
  219. (!skb_transport_header_was_set(DATARMNET543491eb0f))return;DATARMNET668416551c=
  220. tcp_hdr(DATARMNET543491eb0f);if(DATARMNET668416551c->syn)return;
  221. DATARMNETd660a1a629=DATARMNET62fb576113(DATARMNET543491eb0f);if(
  222. DATARMNETd660a1a629||!DATARMNET668416551c->ack)return;DATARMNET3396919a68.
  223. DATARMNET08e913477e=DATARMNET668416551c->dest;DATARMNET3396919a68.
  224. DATARMNETda7f7fa492=DATARMNET668416551c->source;if(DATARMNET543491eb0f->protocol
  225. ==htons(ETH_P_IP)){struct iphdr*DATARMNET86f1f2cdc9=ip_hdr(DATARMNET543491eb0f);
  226. DATARMNET3396919a68.DATARMNETdfe430c2d6=DATARMNET86f1f2cdc9->daddr;
  227. DATARMNET3396919a68.DATARMNET2cb607d686=DATARMNET86f1f2cdc9->saddr;
  228. DATARMNET3396919a68.DATARMNET0d956cc77a=(0xd11+230-0xdf3);}else{struct ipv6hdr*
  229. DATARMNETbf55123e5b=ipv6_hdr(DATARMNET543491eb0f);memcpy(&DATARMNET3396919a68.
  230. DATARMNET815cbb4bf5,&DATARMNETbf55123e5b->daddr,sizeof(DATARMNETbf55123e5b->
  231. daddr));memcpy(&DATARMNET3396919a68.DATARMNETc3f31215b7,&DATARMNETbf55123e5b->
  232. saddr,sizeof(DATARMNETbf55123e5b->saddr));DATARMNET3396919a68.
  233. DATARMNET0d956cc77a=(0xd03+244-0xdf1);}rcu_read_lock();DATARMNET63b1a086d5=
  234. DATARMNET9f0aaf07cc(&DATARMNET3396919a68,DATARMNET543491eb0f,true);if(
  235. DATARMNET63b1a086d5){if(likely(!DATARMNETd92eab34a9(DATARMNET63b1a086d5,jiffies)
  236. ))DATARMNET55fda9e01e(DATARMNET63b1a086d5,DATARMNET543491eb0f,true);}
  237. rcu_read_unlock();}void DATARMNET7fa1835595(u32 DATARMNET556bcfcf8f,u32
  238. DATARMNET9445bc443c){struct DATARMNETddbc1e5435*DATARMNET63b1a086d5;int
  239. DATARMNET5c2fd31d7b;if(DATARMNET556bcfcf8f==(0xd2d+202-0xdf7)){if(
  240. DATARMNET9445bc443c==(0xd2d+202-0xdf7)){DATARMNETc03b668e4c=false;}else if(
  241. DATARMNET9445bc443c==(0xd26+209-0xdf6)){DATARMNETc03b668e4c=true;}return;}
  242. rcu_read_lock();hash_for_each_rcu(DATARMNET1fd012f255,DATARMNET5c2fd31d7b,
  243. DATARMNET63b1a086d5,hash){if(DATARMNET63b1a086d5->DATARMNET9c389f3b86==
  244. DATARMNET556bcfcf8f)WRITE_ONCE(DATARMNET63b1a086d5->DATARMNET9a57846b4e,
  245. DATARMNET9445bc443c);}rcu_read_unlock();}int DATARMNET7e9995246e(void){
  246. INIT_DELAYED_WORK(&DATARMNETac6535da80.DATARMNET190b4452e8,DATARMNETfec9085d8e);
  247. return(0xd2d+202-0xdf7);}void DATARMNET38bb6f2b7a(void){cancel_delayed_work_sync
  248. (&DATARMNETac6535da80.DATARMNET190b4452e8);DATARMNETac6535da80.
  249. DATARMNETcd94e0d3c7=true;schedule_delayed_work(&DATARMNETac6535da80.
  250. DATARMNET190b4452e8,(0xd2d+202-0xdf7));cancel_delayed_work_sync(&
  251. DATARMNETac6535da80.DATARMNET190b4452e8);}