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sendto
..msdn Add comment W32 Constants Translate this page |
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Sends data to a specific destination. |
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| Declaration: |
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int sendto(
SOCKET s,
const char* buf,
int len,
int flags,
const struct sockaddr* to,
int tolen
);
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| FoxPro declaration: |
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DECLARE INTEGER sendto IN ws2_32;
INTEGER s,;
STRING @buf,;
INTEGER buflen,;
INTEGER wsflags,;
STRING @sendto,;
INTEGER tolen
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| Parameters: |
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s
[in] Descriptor identifying a (possibly connected) socket.
buf
[in] Buffer containing the data to be transmitted.
len
[in] Length of the data in buf, in bytes.
flags
[in] Indicator specifying the way in which the call is made.
to
[in] Optional pointer to a sockaddr structure that contains the address of the target socket.
tolen
[in] Size of the address in to, in bytes. |
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| Return value: |
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| If no error occurs, sendto returns the total number of bytes sent, which can be less than the number indicated by len. Otherwise, a value of SOCKET_ERROR is returned, and a specific error code can be retrieved by calling WSAGetLastError. |
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| My comment: |
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The sendto function is normally used on a connectionless socket to send a datagram to a specific peer socket identified by the to parameter. Even if the connectionless socket has been previously connected to a specific address, the to parameter overrides the destination address for that particular datagram only.
On a connection-oriented socket, the to and tolen parameters are ignored, making sendto equivalent to send. |
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| Word Index links for the sendto : |
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| Created: | 2006-06-12 16:22:38 | | Modified: | 2006-06-12 16:26:57 |
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