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Design improvements.

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Externally:
  The calling application can build a proxychain object and assign it to one (or
  more) NSP. Once a NSP get assigned a proxychain it's not possible to remove
  it so that consistency is (should be...) ensured.

Internally:
  An IOD comes with a proxychain context structure storing the whole tunnel
  state. Also each proxy type now has a table of associated functions to use
  as hooks for TCP connects(), read() and write() requests. As a result, adding
  support of new proxy type should be easier. Code also gains readability in
  comparison to large switch/cases that redirect the execution flow according to
  the given proxy type.
This commit is contained in:
henri
2013-04-22 19:29:18 +00:00
parent a6bcd9cb7e
commit 28604b63e3
5 changed files with 158 additions and 57 deletions
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13
nsock/src/nsock_connect.c
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@@ -66,6 +66,9 @@
#include <string.h>
extern struct proxy_actions *ProxyActions;
/* Create the actual socket (nse->iod->sd) underlying the iod. This unblocks the
* socket, binds to the localaddr address, sets IP options, and sets the
* broadcast flag. Trying to change these functions after making this call will
@@ -266,15 +269,7 @@ nsock_event_id nsock_connect_tcp(nsock_pool nsp, nsock_iod ms_iod, nsock_ev_hand
msiod *nsi = (msiod *)ms_iod;
if (nsi->px_ctx) {
memcpy(&nsi->px_ctx->target_ss, saddr, sslen);
nsi->px_ctx->target_sslen = sslen;
nsi->px_ctx->target_port = port;
nsi->px_ctx->target_handler = handler;
saddr = (struct sockaddr *)&nsi->px_ctx->px_current->ss;
sslen = nsi->px_ctx->px_current->sslen;
port = nsi->px_ctx->px_current->port;
handler = nsock_proxy_ev_handler;
return IOD_PX_TCP_CONNECT(nsi)(nsp, ms_iod, handler, timeout_msecs, userdata, saddr, sslen, port);
}
return nsock_connect_tcp_direct(nsp, ms_iod, handler, timeout_msecs, userdata, saddr, sslen, port);