1835b3f0c0d7e1f716c45ec576662eac7a68b8548Daniele Lacamera <(root at/* 2835b3f0c0d7e1f716c45ec576662eac7a68b8548Daniele Lacamera <(root at * TCP HYBLA 3835b3f0c0d7e1f716c45ec576662eac7a68b8548Daniele Lacamera <(root at * 4835b3f0c0d7e1f716c45ec576662eac7a68b8548Daniele Lacamera <(root at * TCP-HYBLA Congestion control algorithm, based on: 5835b3f0c0d7e1f716c45ec576662eac7a68b8548Daniele Lacamera <(root at * C.Caini, R.Firrincieli, "TCP-Hybla: A TCP Enhancement 6835b3f0c0d7e1f716c45ec576662eac7a68b8548Daniele Lacamera <(root at * for Heterogeneous Networks", 7835b3f0c0d7e1f716c45ec576662eac7a68b8548Daniele Lacamera <(root at * International Journal on satellite Communications, 8835b3f0c0d7e1f716c45ec576662eac7a68b8548Daniele Lacamera <(root at * September 2004 9835b3f0c0d7e1f716c45ec576662eac7a68b8548Daniele Lacamera <(root at * Daniele Lacamera 10835b3f0c0d7e1f716c45ec576662eac7a68b8548Daniele Lacamera <(root at * root at danielinux.net 11835b3f0c0d7e1f716c45ec576662eac7a68b8548Daniele Lacamera <(root at */ 12835b3f0c0d7e1f716c45ec576662eac7a68b8548Daniele Lacamera <(root at 13835b3f0c0d7e1f716c45ec576662eac7a68b8548Daniele Lacamera <(root at#include <linux/module.h> 14835b3f0c0d7e1f716c45ec576662eac7a68b8548Daniele Lacamera <(root at#include <net/tcp.h> 15835b3f0c0d7e1f716c45ec576662eac7a68b8548Daniele Lacamera <(root at 16835b3f0c0d7e1f716c45ec576662eac7a68b8548Daniele Lacamera <(root at/* Tcp Hybla structure. */ 17835b3f0c0d7e1f716c45ec576662eac7a68b8548Daniele Lacamera <(root atstruct hybla { 18a2a385d627e1549da4b43a8b3dfe370589766e1cEric Dumazet bool hybla_en; 19835b3f0c0d7e1f716c45ec576662eac7a68b8548Daniele Lacamera <(root at u32 snd_cwnd_cents; /* Keeps increment values when it is <1, <<7 */ 20835b3f0c0d7e1f716c45ec576662eac7a68b8548Daniele Lacamera <(root at u32 rho; /* Rho parameter, integer part */ 21835b3f0c0d7e1f716c45ec576662eac7a68b8548Daniele Lacamera <(root at u32 rho2; /* Rho * Rho, integer part */ 22835b3f0c0d7e1f716c45ec576662eac7a68b8548Daniele Lacamera <(root at u32 rho_3ls; /* Rho parameter, <<3 */ 23835b3f0c0d7e1f716c45ec576662eac7a68b8548Daniele Lacamera <(root at u32 rho2_7ls; /* Rho^2, <<7 */ 24740b0f1841f6e39085b711d41db9ffb07198682bEric Dumazet u32 minrtt_us; /* Minimum smoothed round trip time value seen */ 25835b3f0c0d7e1f716c45ec576662eac7a68b8548Daniele Lacamera <(root at}; 26835b3f0c0d7e1f716c45ec576662eac7a68b8548Daniele Lacamera <(root at 27a2a385d627e1549da4b43a8b3dfe370589766e1cEric Dumazet/* Hybla reference round trip time (default= 1/40 sec = 25 ms), in ms */ 28835b3f0c0d7e1f716c45ec576662eac7a68b8548Daniele Lacamera <(root atstatic int rtt0 = 25; 29835b3f0c0d7e1f716c45ec576662eac7a68b8548Daniele Lacamera <(root atmodule_param(rtt0, int, 0644); 30835b3f0c0d7e1f716c45ec576662eac7a68b8548Daniele Lacamera <(root atMODULE_PARM_DESC(rtt0, "reference rout trip time (ms)"); 31835b3f0c0d7e1f716c45ec576662eac7a68b8548Daniele Lacamera <(root at 32835b3f0c0d7e1f716c45ec576662eac7a68b8548Daniele Lacamera <(root at/* This is called to refresh values for hybla parameters */ 336687e988d9aeaccad6774e6a8304f681f3ec0a03Arnaldo Carvalho de Melostatic inline void hybla_recalc_param (struct sock *sk) 34835b3f0c0d7e1f716c45ec576662eac7a68b8548Daniele Lacamera <(root at{ 356687e988d9aeaccad6774e6a8304f681f3ec0a03Arnaldo Carvalho de Melo struct hybla *ca = inet_csk_ca(sk); 36835b3f0c0d7e1f716c45ec576662eac7a68b8548Daniele Lacamera <(root at 37740b0f1841f6e39085b711d41db9ffb07198682bEric Dumazet ca->rho_3ls = max_t(u32, 38740b0f1841f6e39085b711d41db9ffb07198682bEric Dumazet tcp_sk(sk)->srtt_us / (rtt0 * USEC_PER_MSEC), 39740b0f1841f6e39085b711d41db9ffb07198682bEric Dumazet 8U); 40835b3f0c0d7e1f716c45ec576662eac7a68b8548Daniele Lacamera <(root at ca->rho = ca->rho_3ls >> 3; 41835b3f0c0d7e1f716c45ec576662eac7a68b8548Daniele Lacamera <(root at ca->rho2_7ls = (ca->rho_3ls * ca->rho_3ls) << 1; 42a2a385d627e1549da4b43a8b3dfe370589766e1cEric Dumazet ca->rho2 = ca->rho2_7ls >> 7; 43835b3f0c0d7e1f716c45ec576662eac7a68b8548Daniele Lacamera <(root at} 44835b3f0c0d7e1f716c45ec576662eac7a68b8548Daniele Lacamera <(root at 456687e988d9aeaccad6774e6a8304f681f3ec0a03Arnaldo Carvalho de Melostatic void hybla_init(struct sock *sk) 46835b3f0c0d7e1f716c45ec576662eac7a68b8548Daniele Lacamera <(root at{ 476687e988d9aeaccad6774e6a8304f681f3ec0a03Arnaldo Carvalho de Melo struct tcp_sock *tp = tcp_sk(sk); 486687e988d9aeaccad6774e6a8304f681f3ec0a03Arnaldo Carvalho de Melo struct hybla *ca = inet_csk_ca(sk); 49835b3f0c0d7e1f716c45ec576662eac7a68b8548Daniele Lacamera <(root at 50835b3f0c0d7e1f716c45ec576662eac7a68b8548Daniele Lacamera <(root at ca->rho = 0; 51835b3f0c0d7e1f716c45ec576662eac7a68b8548Daniele Lacamera <(root at ca->rho2 = 0; 52835b3f0c0d7e1f716c45ec576662eac7a68b8548Daniele Lacamera <(root at ca->rho_3ls = 0; 53835b3f0c0d7e1f716c45ec576662eac7a68b8548Daniele Lacamera <(root at ca->rho2_7ls = 0; 54835b3f0c0d7e1f716c45ec576662eac7a68b8548Daniele Lacamera <(root at ca->snd_cwnd_cents = 0; 55a2a385d627e1549da4b43a8b3dfe370589766e1cEric Dumazet ca->hybla_en = true; 56835b3f0c0d7e1f716c45ec576662eac7a68b8548Daniele Lacamera <(root at tp->snd_cwnd = 2; 57835b3f0c0d7e1f716c45ec576662eac7a68b8548Daniele Lacamera <(root at tp->snd_cwnd_clamp = 65535; 58835b3f0c0d7e1f716c45ec576662eac7a68b8548Daniele Lacamera <(root at 59835b3f0c0d7e1f716c45ec576662eac7a68b8548Daniele Lacamera <(root at /* 1st Rho measurement based on initial srtt */ 606687e988d9aeaccad6774e6a8304f681f3ec0a03Arnaldo Carvalho de Melo hybla_recalc_param(sk); 61835b3f0c0d7e1f716c45ec576662eac7a68b8548Daniele Lacamera <(root at 62835b3f0c0d7e1f716c45ec576662eac7a68b8548Daniele Lacamera <(root at /* set minimum rtt as this is the 1st ever seen */ 63740b0f1841f6e39085b711d41db9ffb07198682bEric Dumazet ca->minrtt_us = tp->srtt_us; 64835b3f0c0d7e1f716c45ec576662eac7a68b8548Daniele Lacamera <(root at tp->snd_cwnd = ca->rho; 65835b3f0c0d7e1f716c45ec576662eac7a68b8548Daniele Lacamera <(root at} 66835b3f0c0d7e1f716c45ec576662eac7a68b8548Daniele Lacamera <(root at 676687e988d9aeaccad6774e6a8304f681f3ec0a03Arnaldo Carvalho de Melostatic void hybla_state(struct sock *sk, u8 ca_state) 68835b3f0c0d7e1f716c45ec576662eac7a68b8548Daniele Lacamera <(root at{ 696687e988d9aeaccad6774e6a8304f681f3ec0a03Arnaldo Carvalho de Melo struct hybla *ca = inet_csk_ca(sk); 70a2a385d627e1549da4b43a8b3dfe370589766e1cEric Dumazet 71835b3f0c0d7e1f716c45ec576662eac7a68b8548Daniele Lacamera <(root at ca->hybla_en = (ca_state == TCP_CA_Open); 72835b3f0c0d7e1f716c45ec576662eac7a68b8548Daniele Lacamera <(root at} 73835b3f0c0d7e1f716c45ec576662eac7a68b8548Daniele Lacamera <(root at 74835b3f0c0d7e1f716c45ec576662eac7a68b8548Daniele Lacamera <(root atstatic inline u32 hybla_fraction(u32 odds) 75835b3f0c0d7e1f716c45ec576662eac7a68b8548Daniele Lacamera <(root at{ 76835b3f0c0d7e1f716c45ec576662eac7a68b8548Daniele Lacamera <(root at static const u32 fractions[] = { 77835b3f0c0d7e1f716c45ec576662eac7a68b8548Daniele Lacamera <(root at 128, 139, 152, 165, 181, 197, 215, 234, 78835b3f0c0d7e1f716c45ec576662eac7a68b8548Daniele Lacamera <(root at }; 79835b3f0c0d7e1f716c45ec576662eac7a68b8548Daniele Lacamera <(root at 80835b3f0c0d7e1f716c45ec576662eac7a68b8548Daniele Lacamera <(root at return (odds < ARRAY_SIZE(fractions)) ? fractions[odds] : 128; 81835b3f0c0d7e1f716c45ec576662eac7a68b8548Daniele Lacamera <(root at} 82835b3f0c0d7e1f716c45ec576662eac7a68b8548Daniele Lacamera <(root at 83835b3f0c0d7e1f716c45ec576662eac7a68b8548Daniele Lacamera <(root at/* TCP Hybla main routine. 84835b3f0c0d7e1f716c45ec576662eac7a68b8548Daniele Lacamera <(root at * This is the algorithm behavior: 85835b3f0c0d7e1f716c45ec576662eac7a68b8548Daniele Lacamera <(root at * o Recalc Hybla parameters if min_rtt has changed 86835b3f0c0d7e1f716c45ec576662eac7a68b8548Daniele Lacamera <(root at * o Give cwnd a new value based on the model proposed 87835b3f0c0d7e1f716c45ec576662eac7a68b8548Daniele Lacamera <(root at * o remember increments <1 88835b3f0c0d7e1f716c45ec576662eac7a68b8548Daniele Lacamera <(root at */ 89249015515fe3fc9818d86cb5c83bbc92505ad7dcEric Dumazetstatic void hybla_cong_avoid(struct sock *sk, u32 ack, u32 acked) 90835b3f0c0d7e1f716c45ec576662eac7a68b8548Daniele Lacamera <(root at{ 916687e988d9aeaccad6774e6a8304f681f3ec0a03Arnaldo Carvalho de Melo struct tcp_sock *tp = tcp_sk(sk); 926687e988d9aeaccad6774e6a8304f681f3ec0a03Arnaldo Carvalho de Melo struct hybla *ca = inet_csk_ca(sk); 93835b3f0c0d7e1f716c45ec576662eac7a68b8548Daniele Lacamera <(root at u32 increment, odd, rho_fractions; 94835b3f0c0d7e1f716c45ec576662eac7a68b8548Daniele Lacamera <(root at int is_slowstart = 0; 95835b3f0c0d7e1f716c45ec576662eac7a68b8548Daniele Lacamera <(root at 96835b3f0c0d7e1f716c45ec576662eac7a68b8548Daniele Lacamera <(root at /* Recalculate rho only if this srtt is the lowest */ 97740b0f1841f6e39085b711d41db9ffb07198682bEric Dumazet if (tp->srtt_us < ca->minrtt_us) { 986687e988d9aeaccad6774e6a8304f681f3ec0a03Arnaldo Carvalho de Melo hybla_recalc_param(sk); 99740b0f1841f6e39085b711d41db9ffb07198682bEric Dumazet ca->minrtt_us = tp->srtt_us; 100835b3f0c0d7e1f716c45ec576662eac7a68b8548Daniele Lacamera <(root at } 101835b3f0c0d7e1f716c45ec576662eac7a68b8548Daniele Lacamera <(root at 102249015515fe3fc9818d86cb5c83bbc92505ad7dcEric Dumazet if (!tcp_is_cwnd_limited(sk)) 103f4805eded7d38c4e42bf473dc5eb2f34853beb06Stephen Hemminger return; 104f4805eded7d38c4e42bf473dc5eb2f34853beb06Stephen Hemminger 105ab59859de1946a098b091308380179e92dc7683bHarvey Harrison if (!ca->hybla_en) { 106249015515fe3fc9818d86cb5c83bbc92505ad7dcEric Dumazet tcp_reno_cong_avoid(sk, ack, acked); 107ab59859de1946a098b091308380179e92dc7683bHarvey Harrison return; 108ab59859de1946a098b091308380179e92dc7683bHarvey Harrison } 109835b3f0c0d7e1f716c45ec576662eac7a68b8548Daniele Lacamera <(root at 110835b3f0c0d7e1f716c45ec576662eac7a68b8548Daniele Lacamera <(root at if (ca->rho == 0) 1116687e988d9aeaccad6774e6a8304f681f3ec0a03Arnaldo Carvalho de Melo hybla_recalc_param(sk); 112835b3f0c0d7e1f716c45ec576662eac7a68b8548Daniele Lacamera <(root at 113835b3f0c0d7e1f716c45ec576662eac7a68b8548Daniele Lacamera <(root at rho_fractions = ca->rho_3ls - (ca->rho << 3); 114835b3f0c0d7e1f716c45ec576662eac7a68b8548Daniele Lacamera <(root at 115835b3f0c0d7e1f716c45ec576662eac7a68b8548Daniele Lacamera <(root at if (tp->snd_cwnd < tp->snd_ssthresh) { 116835b3f0c0d7e1f716c45ec576662eac7a68b8548Daniele Lacamera <(root at /* 117835b3f0c0d7e1f716c45ec576662eac7a68b8548Daniele Lacamera <(root at * slow start 118835b3f0c0d7e1f716c45ec576662eac7a68b8548Daniele Lacamera <(root at * INC = 2^RHO - 1 119835b3f0c0d7e1f716c45ec576662eac7a68b8548Daniele Lacamera <(root at * This is done by splitting the rho parameter 120835b3f0c0d7e1f716c45ec576662eac7a68b8548Daniele Lacamera <(root at * into 2 parts: an integer part and a fraction part. 121835b3f0c0d7e1f716c45ec576662eac7a68b8548Daniele Lacamera <(root at * Inrement<<7 is estimated by doing: 122835b3f0c0d7e1f716c45ec576662eac7a68b8548Daniele Lacamera <(root at * [2^(int+fract)]<<7 123835b3f0c0d7e1f716c45ec576662eac7a68b8548Daniele Lacamera <(root at * that is equal to: 124835b3f0c0d7e1f716c45ec576662eac7a68b8548Daniele Lacamera <(root at * (2^int) * [(2^fract) <<7] 125835b3f0c0d7e1f716c45ec576662eac7a68b8548Daniele Lacamera <(root at * 2^int is straightly computed as 1<<int, 126835b3f0c0d7e1f716c45ec576662eac7a68b8548Daniele Lacamera <(root at * while we will use hybla_slowstart_fraction_increment() to 127835b3f0c0d7e1f716c45ec576662eac7a68b8548Daniele Lacamera <(root at * calculate 2^fract in a <<7 value. 128835b3f0c0d7e1f716c45ec576662eac7a68b8548Daniele Lacamera <(root at */ 129835b3f0c0d7e1f716c45ec576662eac7a68b8548Daniele Lacamera <(root at is_slowstart = 1; 130edafe502404f3669d364b6e96d79b54067b634b4Daniele Lacamera increment = ((1 << min(ca->rho, 16U)) * 131edafe502404f3669d364b6e96d79b54067b634b4Daniele Lacamera hybla_fraction(rho_fractions)) - 128; 132835b3f0c0d7e1f716c45ec576662eac7a68b8548Daniele Lacamera <(root at } else { 133835b3f0c0d7e1f716c45ec576662eac7a68b8548Daniele Lacamera <(root at /* 134835b3f0c0d7e1f716c45ec576662eac7a68b8548Daniele Lacamera <(root at * congestion avoidance 135835b3f0c0d7e1f716c45ec576662eac7a68b8548Daniele Lacamera <(root at * INC = RHO^2 / W 136835b3f0c0d7e1f716c45ec576662eac7a68b8548Daniele Lacamera <(root at * as long as increment is estimated as (rho<<7)/window 137835b3f0c0d7e1f716c45ec576662eac7a68b8548Daniele Lacamera <(root at * it already is <<7 and we can easily count its fractions. 138835b3f0c0d7e1f716c45ec576662eac7a68b8548Daniele Lacamera <(root at */ 139835b3f0c0d7e1f716c45ec576662eac7a68b8548Daniele Lacamera <(root at increment = ca->rho2_7ls / tp->snd_cwnd; 140835b3f0c0d7e1f716c45ec576662eac7a68b8548Daniele Lacamera <(root at if (increment < 128) 141835b3f0c0d7e1f716c45ec576662eac7a68b8548Daniele Lacamera <(root at tp->snd_cwnd_cnt++; 142835b3f0c0d7e1f716c45ec576662eac7a68b8548Daniele Lacamera <(root at } 143835b3f0c0d7e1f716c45ec576662eac7a68b8548Daniele Lacamera <(root at 144835b3f0c0d7e1f716c45ec576662eac7a68b8548Daniele Lacamera <(root at odd = increment % 128; 145835b3f0c0d7e1f716c45ec576662eac7a68b8548Daniele Lacamera <(root at tp->snd_cwnd += increment >> 7; 146835b3f0c0d7e1f716c45ec576662eac7a68b8548Daniele Lacamera <(root at ca->snd_cwnd_cents += odd; 147835b3f0c0d7e1f716c45ec576662eac7a68b8548Daniele Lacamera <(root at 148835b3f0c0d7e1f716c45ec576662eac7a68b8548Daniele Lacamera <(root at /* check when fractions goes >=128 and increase cwnd by 1. */ 1492de979bd7da9c8b39cc0aabb0ab5aa1516d929ebStephen Hemminger while (ca->snd_cwnd_cents >= 128) { 150835b3f0c0d7e1f716c45ec576662eac7a68b8548Daniele Lacamera <(root at tp->snd_cwnd++; 151835b3f0c0d7e1f716c45ec576662eac7a68b8548Daniele Lacamera <(root at ca->snd_cwnd_cents -= 128; 152835b3f0c0d7e1f716c45ec576662eac7a68b8548Daniele Lacamera <(root at tp->snd_cwnd_cnt = 0; 153835b3f0c0d7e1f716c45ec576662eac7a68b8548Daniele Lacamera <(root at } 1549d2c27e17b7574023b5adb5c6a50d7aaeb915543Daniele Lacamera /* check when cwnd has not been incremented for a while */ 1559d2c27e17b7574023b5adb5c6a50d7aaeb915543Daniele Lacamera if (increment == 0 && odd == 0 && tp->snd_cwnd_cnt >= tp->snd_cwnd) { 1569d2c27e17b7574023b5adb5c6a50d7aaeb915543Daniele Lacamera tp->snd_cwnd++; 1579d2c27e17b7574023b5adb5c6a50d7aaeb915543Daniele Lacamera tp->snd_cwnd_cnt = 0; 1589d2c27e17b7574023b5adb5c6a50d7aaeb915543Daniele Lacamera } 159835b3f0c0d7e1f716c45ec576662eac7a68b8548Daniele Lacamera <(root at /* clamp down slowstart cwnd to ssthresh value. */ 160835b3f0c0d7e1f716c45ec576662eac7a68b8548Daniele Lacamera <(root at if (is_slowstart) 161835b3f0c0d7e1f716c45ec576662eac7a68b8548Daniele Lacamera <(root at tp->snd_cwnd = min(tp->snd_cwnd, tp->snd_ssthresh); 162835b3f0c0d7e1f716c45ec576662eac7a68b8548Daniele Lacamera <(root at 163835b3f0c0d7e1f716c45ec576662eac7a68b8548Daniele Lacamera <(root at tp->snd_cwnd = min_t(u32, tp->snd_cwnd, tp->snd_cwnd_clamp); 164835b3f0c0d7e1f716c45ec576662eac7a68b8548Daniele Lacamera <(root at} 165835b3f0c0d7e1f716c45ec576662eac7a68b8548Daniele Lacamera <(root at 166a252bebe22155313ccdadc20b79f67a239dc9ecbStephen Hemmingerstatic struct tcp_congestion_ops tcp_hybla __read_mostly = { 167835b3f0c0d7e1f716c45ec576662eac7a68b8548Daniele Lacamera <(root at .init = hybla_init, 168835b3f0c0d7e1f716c45ec576662eac7a68b8548Daniele Lacamera <(root at .ssthresh = tcp_reno_ssthresh, 169835b3f0c0d7e1f716c45ec576662eac7a68b8548Daniele Lacamera <(root at .cong_avoid = hybla_cong_avoid, 170835b3f0c0d7e1f716c45ec576662eac7a68b8548Daniele Lacamera <(root at .set_state = hybla_state, 171835b3f0c0d7e1f716c45ec576662eac7a68b8548Daniele Lacamera <(root at 172835b3f0c0d7e1f716c45ec576662eac7a68b8548Daniele Lacamera <(root at .owner = THIS_MODULE, 173835b3f0c0d7e1f716c45ec576662eac7a68b8548Daniele Lacamera <(root at .name = "hybla" 174835b3f0c0d7e1f716c45ec576662eac7a68b8548Daniele Lacamera <(root at}; 175835b3f0c0d7e1f716c45ec576662eac7a68b8548Daniele Lacamera <(root at 176835b3f0c0d7e1f716c45ec576662eac7a68b8548Daniele Lacamera <(root atstatic int __init hybla_register(void) 177835b3f0c0d7e1f716c45ec576662eac7a68b8548Daniele Lacamera <(root at{ 17874975d40b16fd4bad24a2e2630dc7957d8cba013Alexey Dobriyan BUILD_BUG_ON(sizeof(struct hybla) > ICSK_CA_PRIV_SIZE); 179835b3f0c0d7e1f716c45ec576662eac7a68b8548Daniele Lacamera <(root at return tcp_register_congestion_control(&tcp_hybla); 180835b3f0c0d7e1f716c45ec576662eac7a68b8548Daniele Lacamera <(root at} 181835b3f0c0d7e1f716c45ec576662eac7a68b8548Daniele Lacamera <(root at 182835b3f0c0d7e1f716c45ec576662eac7a68b8548Daniele Lacamera <(root atstatic void __exit hybla_unregister(void) 183835b3f0c0d7e1f716c45ec576662eac7a68b8548Daniele Lacamera <(root at{ 184835b3f0c0d7e1f716c45ec576662eac7a68b8548Daniele Lacamera <(root at tcp_unregister_congestion_control(&tcp_hybla); 185835b3f0c0d7e1f716c45ec576662eac7a68b8548Daniele Lacamera <(root at} 186835b3f0c0d7e1f716c45ec576662eac7a68b8548Daniele Lacamera <(root at 187835b3f0c0d7e1f716c45ec576662eac7a68b8548Daniele Lacamera <(root atmodule_init(hybla_register); 188835b3f0c0d7e1f716c45ec576662eac7a68b8548Daniele Lacamera <(root atmodule_exit(hybla_unregister); 189835b3f0c0d7e1f716c45ec576662eac7a68b8548Daniele Lacamera <(root at 190835b3f0c0d7e1f716c45ec576662eac7a68b8548Daniele Lacamera <(root atMODULE_AUTHOR("Daniele Lacamera"); 191835b3f0c0d7e1f716c45ec576662eac7a68b8548Daniele Lacamera <(root atMODULE_LICENSE("GPL"); 192835b3f0c0d7e1f716c45ec576662eac7a68b8548Daniele Lacamera <(root atMODULE_DESCRIPTION("TCP Hybla"); 193