version 1.5, 1999/10/25 21:04:28 |
version 1.6, 1999/11/23 22:25:54 |
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static void chan_delele_if_full_closed(Channel *c); |
static void chan_delele_if_full_closed(Channel *c); |
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/* |
/* |
* EVENTS: update channel input/output states |
* EVENTS update channel input/output states execute ACTIONS |
* execute ACTIONS |
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*/ |
*/ |
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/* events concerning the INPUT from socket for channel (istate) */ |
/* events concerning the INPUT from socket for channel (istate) */ |
void |
void |
chan_rcvd_oclose(Channel *c){ |
chan_rcvd_oclose(Channel *c) |
switch(c->istate){ |
{ |
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switch (c->istate) { |
case CHAN_INPUT_WAIT_OCLOSE: |
case CHAN_INPUT_WAIT_OCLOSE: |
debug("channel %d: INPUT_WAIT_OCLOSE -> INPUT_CLOSED [rcvd OCLOSE]", c->self); |
debug("channel %d: INPUT_WAIT_OCLOSE -> INPUT_CLOSED [rcvd OCLOSE]", c->self); |
c->istate=CHAN_INPUT_CLOSED; |
c->istate = CHAN_INPUT_CLOSED; |
chan_delele_if_full_closed(c); |
chan_delele_if_full_closed(c); |
break; |
break; |
case CHAN_INPUT_OPEN: |
case CHAN_INPUT_OPEN: |
debug("channel %d: INPUT_OPEN -> INPUT_CLOSED [rvcd OCLOSE, send IEOF]", c->self); |
debug("channel %d: INPUT_OPEN -> INPUT_CLOSED [rvcd OCLOSE, send IEOF]", c->self); |
chan_shutdown_read(c); |
chan_shutdown_read(c); |
chan_send_ieof(c); |
chan_send_ieof(c); |
c->istate=CHAN_INPUT_CLOSED; |
c->istate = CHAN_INPUT_CLOSED; |
chan_delele_if_full_closed(c); |
chan_delele_if_full_closed(c); |
break; |
break; |
default: |
default: |
debug("protocol error: chan_rcvd_oclose %d for istate %d",c->self,c->istate); |
debug("protocol error: chan_rcvd_oclose %d for istate %d", c->self, c->istate); |
break; |
break; |
} |
} |
} |
} |
void |
void |
chan_read_failed(Channel *c){ |
chan_read_failed(Channel *c) |
switch(c->istate){ |
{ |
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switch (c->istate) { |
case CHAN_INPUT_OPEN: |
case CHAN_INPUT_OPEN: |
debug("channel %d: INPUT_OPEN -> INPUT_WAIT_DRAIN [read failed]", c->self); |
debug("channel %d: INPUT_OPEN -> INPUT_WAIT_DRAIN [read failed]", c->self); |
chan_shutdown_read(c); |
chan_shutdown_read(c); |
c->istate=CHAN_INPUT_WAIT_DRAIN; |
c->istate = CHAN_INPUT_WAIT_DRAIN; |
break; |
break; |
default: |
default: |
debug("internal error: we do not read, but chan_read_failed %d for istate %d", |
debug("internal error: we do not read, but chan_read_failed %d for istate %d", |
c->self,c->istate); |
c->self, c->istate); |
break; |
break; |
} |
} |
} |
} |
void |
void |
chan_ibuf_empty(Channel *c){ |
chan_ibuf_empty(Channel *c) |
if(buffer_len(&c->input)){ |
{ |
debug("internal error: chan_ibuf_empty %d for non empty buffer",c->self); |
if (buffer_len(&c->input)) { |
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debug("internal error: chan_ibuf_empty %d for non empty buffer", c->self); |
return; |
return; |
} |
} |
switch(c->istate){ |
switch (c->istate) { |
case CHAN_INPUT_WAIT_DRAIN: |
case CHAN_INPUT_WAIT_DRAIN: |
debug("channel %d: INPUT_WAIT_DRAIN -> INPUT_WAIT_OCLOSE [inbuf empty, send IEOF]", c->self); |
debug("channel %d: INPUT_WAIT_DRAIN -> INPUT_WAIT_OCLOSE [inbuf empty, send IEOF]", c->self); |
chan_send_ieof(c); |
chan_send_ieof(c); |
c->istate=CHAN_INPUT_WAIT_OCLOSE; |
c->istate = CHAN_INPUT_WAIT_OCLOSE; |
break; |
break; |
default: |
default: |
debug("internal error: chan_ibuf_empty %d for istate %d",c->self,c->istate); |
debug("internal error: chan_ibuf_empty %d for istate %d", c->self, c->istate); |
break; |
break; |
} |
} |
} |
} |
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/* events concerning the OUTPUT from channel for socket (ostate) */ |
/* events concerning the OUTPUT from channel for socket (ostate) */ |
void |
void |
chan_rcvd_ieof(Channel *c){ |
chan_rcvd_ieof(Channel *c) |
switch(c->ostate){ |
{ |
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switch (c->ostate) { |
case CHAN_OUTPUT_OPEN: |
case CHAN_OUTPUT_OPEN: |
debug("channel %d: OUTPUT_OPEN -> OUTPUT_WAIT_DRAIN [rvcd IEOF]", c->self); |
debug("channel %d: OUTPUT_OPEN -> OUTPUT_WAIT_DRAIN [rvcd IEOF]", c->self); |
c->ostate=CHAN_OUTPUT_WAIT_DRAIN; |
c->ostate = CHAN_OUTPUT_WAIT_DRAIN; |
break; |
break; |
case CHAN_OUTPUT_WAIT_IEOF: |
case CHAN_OUTPUT_WAIT_IEOF: |
debug("channel %d: OUTPUT_WAIT_IEOF -> OUTPUT_CLOSED [rvcd IEOF]", c->self); |
debug("channel %d: OUTPUT_WAIT_IEOF -> OUTPUT_CLOSED [rvcd IEOF]", c->self); |
c->ostate=CHAN_OUTPUT_CLOSED; |
c->ostate = CHAN_OUTPUT_CLOSED; |
chan_delele_if_full_closed(c); |
chan_delele_if_full_closed(c); |
break; |
break; |
default: |
default: |
debug("protocol error: chan_rcvd_ieof %d for ostate %d", c->self,c->ostate); |
debug("protocol error: chan_rcvd_ieof %d for ostate %d", c->self, c->ostate); |
break; |
break; |
} |
} |
} |
} |
void |
void |
chan_write_failed(Channel *c){ |
chan_write_failed(Channel *c) |
switch(c->ostate){ |
{ |
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switch (c->ostate) { |
case CHAN_OUTPUT_OPEN: |
case CHAN_OUTPUT_OPEN: |
debug("channel %d: OUTPUT_OPEN -> OUTPUT_WAIT_IEOF [write failed]", c->self); |
debug("channel %d: OUTPUT_OPEN -> OUTPUT_WAIT_IEOF [write failed]", c->self); |
chan_send_oclose(c); |
chan_send_oclose(c); |
c->ostate=CHAN_OUTPUT_WAIT_IEOF; |
c->ostate = CHAN_OUTPUT_WAIT_IEOF; |
break; |
break; |
case CHAN_OUTPUT_WAIT_DRAIN: |
case CHAN_OUTPUT_WAIT_DRAIN: |
debug("channel %d: OUTPUT_WAIT_DRAIN -> OUTPUT_CLOSED [write failed]", c->self); |
debug("channel %d: OUTPUT_WAIT_DRAIN -> OUTPUT_CLOSED [write failed]", c->self); |
chan_send_oclose(c); |
chan_send_oclose(c); |
c->ostate=CHAN_OUTPUT_CLOSED; |
c->ostate = CHAN_OUTPUT_CLOSED; |
chan_delele_if_full_closed(c); |
chan_delele_if_full_closed(c); |
break; |
break; |
default: |
default: |
debug("internal error: chan_write_failed %d for ostate %d",c->self,c->ostate); |
debug("internal error: chan_write_failed %d for ostate %d", c->self, c->ostate); |
break; |
break; |
} |
} |
} |
} |
void |
void |
chan_obuf_empty(Channel *c){ |
chan_obuf_empty(Channel *c) |
if(buffer_len(&c->output)){ |
{ |
debug("internal error: chan_obuf_empty %d for non empty buffer",c->self); |
if (buffer_len(&c->output)) { |
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debug("internal error: chan_obuf_empty %d for non empty buffer", c->self); |
return; |
return; |
} |
} |
switch(c->ostate){ |
switch (c->ostate) { |
case CHAN_OUTPUT_WAIT_DRAIN: |
case CHAN_OUTPUT_WAIT_DRAIN: |
debug("channel %d: OUTPUT_WAIT_DRAIN -> OUTPUT_CLOSED [obuf empty, send OCLOSE]", c->self); |
debug("channel %d: OUTPUT_WAIT_DRAIN -> OUTPUT_CLOSED [obuf empty, send OCLOSE]", c->self); |
chan_send_oclose(c); |
chan_send_oclose(c); |
c->ostate=CHAN_OUTPUT_CLOSED; |
c->ostate = CHAN_OUTPUT_CLOSED; |
chan_delele_if_full_closed(c); |
chan_delele_if_full_closed(c); |
break; |
break; |
default: |
default: |
debug("internal error: chan_obuf_empty %d for ostate %d",c->self,c->ostate); |
debug("internal error: chan_obuf_empty %d for ostate %d", c->self, c->ostate); |
break; |
break; |
} |
} |
} |
} |
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/* |
/* |
* ACTIONS: should never update c->istate or c->ostate |
* ACTIONS: should never update the channel states: c->istate or c->ostate |
*/ |
*/ |
static void |
static void |
chan_send_ieof(Channel *c){ |
chan_send_ieof(Channel *c) |
switch(c->istate){ |
{ |
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switch (c->istate) { |
case CHAN_INPUT_OPEN: |
case CHAN_INPUT_OPEN: |
case CHAN_INPUT_WAIT_DRAIN: |
case CHAN_INPUT_WAIT_DRAIN: |
packet_start(SSH_MSG_CHANNEL_INPUT_EOF); |
packet_start(SSH_MSG_CHANNEL_INPUT_EOF); |
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packet_send(); |
packet_send(); |
break; |
break; |
default: |
default: |
debug("internal error: channel %d: cannot send IEOF for istate %d",c->self,c->istate); |
debug("internal error: channel %d: cannot send IEOF for istate %d", c->self, c->istate); |
break; |
break; |
} |
} |
} |
} |
static void |
static void |
chan_send_oclose(Channel *c){ |
chan_send_oclose(Channel *c) |
switch(c->ostate){ |
{ |
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switch (c->ostate) { |
case CHAN_OUTPUT_OPEN: |
case CHAN_OUTPUT_OPEN: |
case CHAN_OUTPUT_WAIT_DRAIN: |
case CHAN_OUTPUT_WAIT_DRAIN: |
chan_shutdown_write(c); |
chan_shutdown_write(c); |
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packet_send(); |
packet_send(); |
break; |
break; |
default: |
default: |
debug("internal error: channel %d: cannot send OCLOSE for ostate %d",c->self,c->istate); |
debug("internal error: channel %d: cannot send OCLOSE for ostate %d", c->self, c->istate); |
break; |
break; |
} |
} |
} |
} |
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/* helper */ |
/* helper */ |
static void |
static void |
chan_shutdown_write(Channel *c){ |
chan_shutdown_write(Channel *c) |
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{ |
debug("channel %d: shutdown_write", c->self); |
debug("channel %d: shutdown_write", c->self); |
if(shutdown(c->sock, SHUT_WR)<0) |
if (shutdown(c->sock, SHUT_WR) < 0) |
error("chan_shutdown_write failed for #%d/fd%d: %.100s", |
error("chan_shutdown_write failed for #%d/fd%d: %.100s", |
c->self, c->sock, strerror(errno)); |
c->self, c->sock, strerror(errno)); |
} |
} |
static void |
static void |
chan_shutdown_read(Channel *c){ |
chan_shutdown_read(Channel *c) |
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{ |
debug("channel %d: shutdown_read", c->self); |
debug("channel %d: shutdown_read", c->self); |
if(shutdown(c->sock, SHUT_RD)<0) |
if (shutdown(c->sock, SHUT_RD) < 0) |
error("chan_shutdown_read failed for #%d/fd%d: %.100s", |
error("chan_shutdown_read failed for #%d/fd%d: %.100s", |
c->self, c->sock, strerror(errno)); |
c->self, c->sock, strerror(errno)); |
} |
} |
static void |
static void |
chan_delele_if_full_closed(Channel *c){ |
chan_delele_if_full_closed(Channel *c) |
if(c->istate==CHAN_INPUT_CLOSED && c->ostate==CHAN_OUTPUT_CLOSED){ |
{ |
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if (c->istate == CHAN_INPUT_CLOSED && c->ostate == CHAN_OUTPUT_CLOSED) { |
debug("channel %d: closing", c->self); |
debug("channel %d: closing", c->self); |
channel_free(c->self); |
channel_free(c->self); |
} |
} |
} |
} |
void |
void |
chan_init_iostates(Channel *c){ |
chan_init_iostates(Channel *c) |
c->ostate=CHAN_OUTPUT_OPEN; |
{ |
c->istate=CHAN_INPUT_OPEN; |
c->ostate = CHAN_OUTPUT_OPEN; |
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c->istate = CHAN_INPUT_OPEN; |
} |
} |