58 lines
2.8 KiB
Groff
58 lines
2.8 KiB
Groff
'\" t
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.\" Title: upscli_connect
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.\" Author: [FIXME: author] [see http://www.docbook.org/tdg5/en/html/author]
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.\" Generator: DocBook XSL Stylesheets vsnapshot <http://docbook.sf.net/>
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.\" Date: 04/26/2022
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.\" Manual: NUT Manual
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.\" Source: Network UPS Tools 2.8.0
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.\" Language: English
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.\"
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.TH "UPSCLI_CONNECT" "3" "04/26/2022" "Network UPS Tools 2\&.8\&.0" "NUT Manual"
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.\" -----------------------------------------------------------------
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.\" * Define some portability stuff
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.\" -----------------------------------------------------------------
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.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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.\" http://bugs.debian.org/507673
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.\" http://lists.gnu.org/archive/html/groff/2009-02/msg00013.html
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.\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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.ie \n(.g .ds Aq \(aq
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.el .ds Aq '
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.\" -----------------------------------------------------------------
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.\" * set default formatting
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.\" -----------------------------------------------------------------
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.\" disable hyphenation
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.nh
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.\" disable justification (adjust text to left margin only)
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.ad l
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.\" -----------------------------------------------------------------
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.\" * MAIN CONTENT STARTS HERE *
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.\" -----------------------------------------------------------------
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.SH "NAME"
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upscli_connect \- Open a connection to a NUT upsd
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.SH "SYNOPSIS"
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.sp
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.nf
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#include <upsclient\&.h>
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.fi
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.sp
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.nf
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int upscli_connect(UPSCONN_t *ups, const char *host, uint16_t port, int flags);
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.fi
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.SH "DESCRIPTION"
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.sp
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The \fBupscli_connect()\fR function takes the pointer \fIups\fR to a UPSCONN_t state structure and opens a TCP connection to the \fIhost\fR on the given \fIport\fR\&.
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.sp
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\fIflags\fR may be either UPSCLI_CONN_TRYSSL to try a SSL connection, or UPSCLI_CONN_REQSSL to require a SSL connection\&.
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.sp
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Introduced in version 2\&.7, an additional flag UPSCLI_CONN_CERTVERIF now exists to verify the signature offered during the SSL handshake\&. This flag should be used in conjunction with \fBupscli_init\fR(3) and/or \fBupscli_add_host_cert\fR(3) calls before connecting in order to define a CA certificate with which to verify\&.
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.sp
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If SSL mode is required, this function will only return successfully if it is able to establish a SSL connection with the server\&. Possible reasons for failure include no SSL support on the server, and if \fBupsclient\fR itself hasn\(cqt been compiled with SSL support\&.
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.sp
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You must call \fBupscli_disconnect\fR(3) when finished with a connection, or your program will slowly leak memory and file descriptors\&.
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.SH "RETURN VALUE"
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.sp
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The \fBupscli_connect()\fR function modifies the UPSCONN_t structure and returns 0 on success, or \-1 if an error occurs\&.
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.SH "SEE ALSO"
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.sp
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\fBupscli_disconnect\fR(3), \fBupscli_fd\fR(3), \fBupscli_splitaddr\fR(3), \fBupscli_splitname\fR(3), \fBupscli_ssl\fR(3), \fBupscli_strerror\fR(3), \fBupscli_upserror\fR(3)
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