src/core/tcp_out.c

391   u16_t mss_local = LWIP_MIN(pcb->mss, TCPWND_MIN16(pcb->snd_wnd_max/2));
392   mss_local = mss_local ? mss_local : pcb->mss;
417     mss_local = LWIP_MAX(mss_local, LWIP_TCP_OPT_LEN_TS + 1);
455     LWIP_ASSERT("mss_local is too small", mss_local >= last_unsent->len + unsent_optlen);
456     space = mss_local - (last_unsent->len + unsent_optlen);
562     u16_t max_len = mss_local - optlen;
572       if ((p = tcp_pbuf_prealloc(PBUF_TRANSPORT, seglen + optlen, mss_local, &oversize, pcb, apiflags, queue == NULL)) == NULL) {