diff options
Diffstat (limited to 'main/dahdi-linux-grsec/dahdi-bri_dchan.patch')
| -rw-r--r-- | main/dahdi-linux-grsec/dahdi-bri_dchan.patch | 161 |
1 files changed, 161 insertions, 0 deletions
diff --git a/main/dahdi-linux-grsec/dahdi-bri_dchan.patch b/main/dahdi-linux-grsec/dahdi-bri_dchan.patch new file mode 100644 index 00000000000..d7a3fe859b0 --- /dev/null +++ b/main/dahdi-linux-grsec/dahdi-bri_dchan.patch @@ -0,0 +1,161 @@ +# Translate the D channels to a standard channel data. +# The HFC chipset provides us the D channel as data, but +# Zaptel expects it as a standard channel with 1000 samples +# per second. + +--- a/include/dahdi/kernel.h ++++ b/include/dahdi/kernel.h +@@ -132,6 +132,13 @@ struct dahdi_chan { + int do_ppp_error; + struct sk_buff_head ppp_rq; + #endif ++#ifdef CONFIG_DAHDI_BRI_DCHANS ++ int bytes2receive; ++ int maxbytes2transmit; /* size of the tx buffer in the card driver */ ++ int bytes2transmit; ++ int eofrx; ++ int eoftx; ++#endif + spinlock_t lock; + char name[40]; + /* Specified by DAHDI */ +@@ -462,6 +469,9 @@ enum { + DAHDI_FLAGBIT_LOOPED = 18, /*!< Loopback the receive data from the channel to the transmit */ + DAHDI_FLAGBIT_MTP2 = 19, /*!< Repeats last message in buffer and also discards repeating messages sent to us */ + DAHDI_FLAGBIT_HDLC56 = 20, /*!< Sets the given channel (if in HDLC mode) to use 56K HDLC instead of 64K */ ++#if defined(CONFIG_DAHDI_BRI_DCHANS) ++ DAHDI_FLAGBIT_BRIDCHAN = 21, /*!< hardhdlc-like handling of the D channel */ ++#endif + }; + + /* map flagbits to flag masks */ +@@ -500,6 +510,7 @@ enum { + #define DAHDI_FLAG_LOOPED DAHDI_FLAG(LOOPED) + #define DAHDI_FLAG_MTP2 DAHDI_FLAG(MTP2) + #define DAHDI_FLAG_HDLC56 DAHDI_FLAG(HDLC56) ++#define DAHDI_FLAG_BRIDCHAN DAHDI_FLAG(BRIDCHAN) + + struct dahdi_span { + spinlock_t lock; +--- a/include/dahdi/dahdi_config.h ++++ b/include/dahdi/dahdi_config.h +@@ -174,4 +174,10 @@ + */ + /* #define OPTIMIZE_CHANMUTE */ + ++/* ++ * Uncomment the following for BRI D channels ++ * ++ */ ++#define CONFIG_DAHDI_BRI_DCHANS ++ + #endif +--- a/drivers/dahdi/dahdi-base.c ++++ b/drivers/dahdi/dahdi-base.c +@@ -5907,11 +5907,40 @@ static inline void __dahdi_getbuf_chunk( + *(txb++) = fasthdlc_tx_run_nocheck(&ms->txhdlc); + } + bytes -= left; ++#ifdef CONFIG_DAHDI_BRI_DCHANS ++ } else if (test_bit(DAHDI_FLAGBIT_BRIDCHAN, &ms->flags)) { ++ /* ++ * Let's get this right, we want to transmit complete frames only. ++ * The card driver will do the dirty HDLC work for us. ++ * txb (transmit buffer) is supposed to be big enough to store one frame ++ * we will make this as big as the D fifo (1KB or 2KB) ++ */ ++ ++ /* there are 'left' bytes in the user buffer left to transmit */ ++ left = ms->writen[ms->outwritebuf] - ms->writeidx[ms->outwritebuf] - 2; ++ if (left > ms->maxbytes2transmit) { ++ memcpy(txb, buf + ms->writeidx[ms->outwritebuf], ms->maxbytes2transmit); ++ ms->writeidx[ms->outwritebuf] += ms->maxbytes2transmit; ++ txb += ms->maxbytes2transmit; ++ ms->bytes2transmit = ms->maxbytes2transmit; ++ ms->eoftx = 0; ++ } else { ++ memcpy(txb, buf + ms->writeidx[ms->outwritebuf], left); ++ ms->writeidx[ms->outwritebuf] += left + 2; ++ txb += left + 2; ++ ms->bytes2transmit = left; ++ ms->eoftx = 1; ++ } ++ bytes = 0; ++#endif + } else { + memcpy(txb, buf + ms->writeidx[ms->outwritebuf], left); + ms->writeidx[ms->outwritebuf]+=left; + txb += left; + bytes -= left; ++#if defined(CONFIG_DAHDI_BRI_DCHANS) ++ ms->bytes2transmit=DAHDI_CHUNKSIZE; ++#endif + } + /* Check buffer status */ + if (ms->writeidx[ms->outwritebuf] >= ms->writen[ms->outwritebuf]) { +@@ -5968,6 +5997,17 @@ out in the later versions, and is put ba + /* Transmit a flag if this is an HDLC channel */ + if (ms->flags & DAHDI_FLAG_HDLC) + fasthdlc_tx_frame_nocheck(&ms->txhdlc); ++#if defined(CONFIG_DAHDI_BRI_DCHANS) ++ if (test_bit(DAHDI_FLAGBIT_BRIDCHAN, &ms->flags)) { ++ // if (ms->bytes2transmit > 0) { ++ // txb += 2; ++ // ms->bytes2transmit -= 2; ++ bytes=0; ++ ms->eoftx = 1; ++// printk(KERN_CRIT "zaptel EOF(%d) bytes2transmit %d\n",ms->eoftx,ms->bytes2transmit); ++ // } ++ } ++#endif + #ifdef CONFIG_DAHDI_NET + if (ms->flags & DAHDI_FLAG_NETDEV) + netif_wake_queue(ztchan_to_dev(ms)); +@@ -6028,6 +6068,12 @@ out in the later versions, and is put ba + memset(txb, 0xFF, bytes); + } + bytes = 0; ++#if defined(CONFIG_DAHDI_BRI_DCHANS) ++ } else if (test_bit(DAHDI_FLAGBIT_BRIDCHAN, &ms->flags)) { ++ ms->bytes2transmit = 0; ++ ms->eoftx = 0; ++ bytes = 0; ++#endif + } else { + memset(txb, DAHDI_LIN2X(0, ms), bytes); /* Lastly we use silence on telephony channels */ + bytes = 0; +@@ -6840,6 +6886,14 @@ static inline void __putbuf_chunk(struct + int res; + int left, x; + ++#if defined(CONFIG_DAHDI_BRI_DCHANS) ++ if (test_bit(DAHDI_FLAGBIT_BRIDCHAN, &ms->flags)) { ++ bytes = ms->bytes2receive; ++ if (bytes < 1) return; ++// printk(KERN_CRIT "bytes2receive %d\n",ms->bytes2receive); ++ } ++#endif ++ + while(bytes) { + #if defined(CONFIG_DAHDI_NET) || defined(CONFIG_DAHDI_PPP) + skb = NULL; +@@ -6897,6 +6951,19 @@ static inline void __putbuf_chunk(struct + } + } + } ++#ifdef CONFIG_DAHDI_BRI_DCHANS ++ } else if (test_bit(DAHDI_FLAGBIT_BRIDCHAN, &ms->flags)) { ++ memcpy(buf + ms->readidx[ms->inreadbuf], rxb, left); ++ rxb += left; ++ ms->readidx[ms->inreadbuf] += left; ++ bytes -= left; ++ if (ms->eofrx == 1) { ++ eof=1; ++ } ++// printk(KERN_CRIT "receiving %d bytes\n",ms->bytes2receive); ++ ms->bytes2receive = 0; ++ ms->eofrx = 0; ++#endif + } else { + /* Not HDLC */ + memcpy(buf + ms->readidx[ms->inreadbuf], rxb, left); |