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Support for falling back through the list of addresses returned from

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a DNS lookup, whether they're IPv4, v6 or a mixture of both.

[originally from svn r5119]
[this svn revision also touched putty-wishlist]
This commit is contained in:
Simon Tatham
2005-01-16 14:29:34 +00:00
parent 0f754aac82
commit f70efc5cc6
10 changed files with 648 additions and 352 deletions
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15
network.h
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@ -46,6 +46,20 @@ struct socket_function_table {
};
struct plug_function_table {
void (*log)(Plug p, int type, SockAddr addr, int port,
const char *error_msg, int error_code);
/*
* Passes the client progress reports on the process of setting
* up the connection.
*
* - type==0 means we are about to try to connect to address
* `addr' (error_msg and error_code are ignored)
* - type==1 means we have failed to connect to address `addr'
* (error_msg and error_code are supplied). This is not a
* fatal error - we may well have other candidate addresses
* to fall back to. When it _is_ fatal, the closing()
* function will be called.
*/
int (*closing)
(Plug p, const char *error_msg, int error_code, int calling_back);
/* error_msg is NULL iff it is not an error (ie it closed normally) */
@ -123,6 +137,7 @@ Socket sk_register(OSSocket sock, Plug plug);
#define sk_flush(s) (((*s)->flush) (s))
#ifdef DEFINE_PLUG_METHOD_MACROS
#define plug_log(p,type,addr,port,msg,code) (((*p)->log) (p, type, addr, port, msg, code))
#define plug_closing(p,msg,code,callback) (((*p)->closing) (p, msg, code, callback))
#define plug_receive(p,urgent,buf,len) (((*p)->receive) (p, urgent, buf, len))
#define plug_sent(p,bufsize) (((*p)->sent) (p, bufsize))