Remove my local patch again, it was still not meant to be commited.
[dragonfly.git] / secure / lib / libssl / man / SSL_connect.3
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80.\" If the F register is turned on, we'll generate
81.\" index entries out stderr for the following things:
82.\" TH Title
83.\" SH Header
84.\" Sh Subsection
85.\" Ip Item
86.\" X<> Xref (embedded
87.\" Of course, you have to process the output yourself
88.\" in some meaninful fashion.
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96.TH SSL_connect 3 "0.9.7d" "2/Sep/2004" "OpenSSL"
97.UC
98.if n .hy 0
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188.\}
189.rm #[ #] #H #V #F C
984263bc 190.SH "NAME"
a7d27d5a 191SSL_connect \- initiate the TLS/SSL handshake with an TLS/SSL server
984263bc 192.SH "SYNOPSIS"
a7d27d5a 193.PP
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194.Vb 1
195\& #include <openssl/ssl.h>
196.Ve
197.Vb 1
198\& int SSL_connect(SSL *ssl);
199.Ve
200.SH "DESCRIPTION"
a7d27d5a 201\fISSL_connect()\fR initiates the TLS/SSL handshake with a server. The communication
984263bc 202channel must already have been set and assigned to the \fBssl\fR by setting an
a7d27d5a 203underlying \fBBIO\fR.
984263bc 204.SH "NOTES"
a7d27d5a 205The behaviour of \fISSL_connect()\fR depends on the underlying BIO.
984263bc 206.PP
a7d27d5a 207If the underlying BIO is \fBblocking\fR, \fISSL_connect()\fR will only return once the
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208handshake has been finished or an error occurred.
209.PP
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210If the underlying BIO is \fBnon-blocking\fR, \fISSL_connect()\fR will also return
211when the underlying BIO could not satisfy the needs of \fISSL_connect()\fR
212to continue the handshake, indicating the problem by the return value \-1.
213In this case a call to \fISSL_get_error()\fR with the
214return value of \fISSL_connect()\fR will yield \fBSSL_ERROR_WANT_READ\fR or
215\fBSSL_ERROR_WANT_WRITE\fR. The calling process then must repeat the call after
984263bc 216taking appropriate action to satisfy the needs of \fISSL_connect()\fR.
a7d27d5a 217The action depends on the underlying BIO. When using a non-blocking socket,
984263bc 218nothing is to be done, but \fIselect()\fR can be used to check for the required
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219condition. When using a buffering BIO, like a BIO pair, data must be written
220into or retrieved out of the BIO before being able to continue.
984263bc 221.SH "RETURN VALUES"
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222The following return values can occur:
223.Ip "1" 4
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224The \s-1TLS/SSL\s0 handshake was successfully completed, a \s-1TLS/SSL\s0 connection has been
225established.
226.Ip "0" 4
227The \s-1TLS/SSL\s0 handshake was not successful but was shut down controlled and
228by the specifications of the \s-1TLS/SSL\s0 protocol. Call \fISSL_get_error()\fR with the
229return value \fBret\fR to find out the reason.
230.Ip "<0" 4
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231The \s-1TLS/SSL\s0 handshake was not successful, because a fatal error occurred either
232at the protocol level or a connection failure occurred. The shutdown was
233not clean. It can also occur of action is need to continue the operation
234for non-blocking BIOs. Call \fISSL_get_error()\fR with the return value \fBret\fR
235to find out the reason.
236.SH "SEE ALSO"
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237SSL_get_error(3), SSL_accept(3),
238SSL_shutdown(3), ssl(3), bio(3),
239SSL_set_connect_state(3),
240SSL_do_handshake(3),
241SSL_CTX_new(3)
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242
243.rn }` ''
244.IX Title "SSL_connect 3"
245.IX Name "SSL_connect - initiate the TLS/SSL handshake with an TLS/SSL server"
246
247.IX Header "NAME"
248
249.IX Header "SYNOPSIS"
250
251.IX Header "DESCRIPTION"
252
253.IX Header "NOTES"
254
255.IX Header "RETURN VALUES"
256
257.IX Item "1"
258
259.IX Item "0"
260
261.IX Item "<0"
262
263.IX Header "SEE ALSO"
264