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.TH socket_send6 3
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.SH NAME
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socket_send6 \- send a UDP datagram
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.SH SYNTAX
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.B #include <socket.h>
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ssize_t \fBsocket_send6\fP(int \fIs\fR, const char* \fIbuf\fR, size_t \fIlen\fR,
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const char \fIip\fR[16], uint16 \fIport\fR, uint32 \fIscope_id\fR);
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.SH DESCRIPTION
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socket_send6 sends \fIlen\fR bytes starting at \fIbuf\fR in a UDP
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datagram over the socket \fIs\fR to UDP port \fIport\fR on IP address
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\fIip\fR.
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You can call socket_send6 without calling socket_bind6. This has the
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effect as first calling socket_bind6 with IP address :: and port 0.
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The meaning of \fIscope_id\fR is dependent on the implementation and
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IPv6 IP. On link-local IPv6 addresses it specifies the outgoing
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interface index. The name (e.g. "eth0") for a given interface index can
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be queried with getifname. \fIscope_id\fR should normally be set to 0.
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.SH RETURN VALUE
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socket_send6 returns 0 if the datagram was sent successfully. If not,
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it returns -1 and sets errno appropriately.
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.SH EXAMPLE
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#include <socket.h>
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int \fIs\fR;
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char \fIip\fR[16];
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uint16 \fIp\fR;
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uint32 \fIscope_id\fR;
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\fIs\fR = socket_tcp4();
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socket_bind6(s,ip,p);
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socket_send6(s,"hello, world",12,ip,p,scope_id);
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.SH "SEE ALSO"
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socket_send4(3), socket_getifidx(3)
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