| 182 | } |
| 183 | |
| 184 | static __inline void |
| 185 | chd_window_increase(struct cc_var *ccv, int new_measurement) |
| 186 | { |
| 187 | struct chd *chd_data; |
| 188 | int incr; |
| 189 | |
| 190 | chd_data = ccv->cc_data; |
| 191 | incr = 0; |
| 192 | |
| 193 | if (CCV(ccv, snd_cwnd) <= CCV(ccv, snd_ssthresh)) { |
| 194 | /* Adapted from NewReno slow start. */ |
| 195 | if (V_tcp_do_rfc3465) { |
| 196 | /* In slow-start with ABC enabled. */ |
| 197 | if (CCV(ccv, snd_nxt) == CCV(ccv, snd_max)) { |
| 198 | /* Not due to RTO. */ |
| 199 | incr = min(ccv->bytes_this_ack, |
| 200 | V_tcp_abc_l_var * CCV(ccv, t_maxseg)); |
| 201 | } else { |
| 202 | /* Due to RTO. */ |
| 203 | incr = min(ccv->bytes_this_ack, |
| 204 | CCV(ccv, t_maxseg)); |
| 205 | } |
| 206 | } else |
| 207 | incr = CCV(ccv, t_maxseg); |
| 208 | |
| 209 | } else { /* Congestion avoidance. */ |
| 210 | if (V_tcp_do_rfc3465) { |
| 211 | if (ccv->flags & CCF_ABC_SENTAWND) { |
| 212 | ccv->flags &= ~CCF_ABC_SENTAWND; |
| 213 | incr = CCV(ccv, t_maxseg); |
| 214 | } |
| 215 | } else if (new_measurement) |
| 216 | incr = CCV(ccv, t_maxseg); |
| 217 | } |
| 218 | |
| 219 | if (chd_data->shadow_w > 0) { |
| 220 | /* Track NewReno window. */ |
| 221 | chd_data->shadow_w = min(chd_data->shadow_w + incr, |
| 222 | TCP_MAXWIN << CCV(ccv, snd_scale)); |
| 223 | } |
| 224 | |
| 225 | CCV(ccv,snd_cwnd) = min(CCV(ccv, snd_cwnd) + incr, |
| 226 | TCP_MAXWIN << CCV(ccv, snd_scale)); |
| 227 | } |
| 228 | |
| 229 | /* |
| 230 | * All ACK signals are used for timing measurements to determine delay-based |
no test coverage detected