37 lines
1.5 KiB
Plaintext
37 lines
1.5 KiB
Plaintext
|
sendto
|
||
|
|
======
|
||
|
|
:title: Shellcode Compiler Runtime
|
||
|
|
|
||
|
|
---------------------------------------------
|
||
|
|
ssize_t sendto(int fd, const void* buf, size_t n, int flags, const struct sockaddr* addr, socklen_t addrlen);
|
||
|
|
---------------------------------------------
|
||
|
|
|
||
|
|
Sends `n` bytes from the buffer `buf` over the socket `fd`. If `addr` is not `NULL`, specifies the address that the
|
||
|
|
data will be sent to. Returns the number of bytes sent, or the negation of the error code on error. It is possible
|
||
|
|
for the number of bytes sent to be smaller than the number of bytes requested.
|
||
|
|
|
||
|
|
The supported address types for the `addr` parameter are below:
|
||
|
|
|
||
|
|
---------------------------------------------
|
||
|
|
struct sockaddr_in;
|
||
|
|
struct sockaddr_in6;
|
||
|
|
struct sockaddr_un;
|
||
|
|
---------------------------------------------
|
||
|
|
|
||
|
|
IMPORTANT: The socket family member of the address structure must use the `AF_*` constants. The
|
||
|
|
`PF_*` constants must only be used when creating sockets. This is to automatically set the length
|
||
|
|
field present only on BSD. The length fields are not explicitly present in this runtime.
|
||
|
|
|
||
|
|
IMPORTANT: If the system call is interrupted, this function will return `-EINTR`. This differs from most C runtimes,
|
||
|
|
where `-1` is returned with `errno` set to `EINTR`. As this runtime does not have `errno`, callers should check
|
||
|
|
for `-EINTR` and a result less than zero in the error checking code.
|
||
|
|
|
||
|
|
See also
|
||
|
|
--------
|
||
|
|
link:recv.html[recv],
|
||
|
|
link:recv_all.html[recv_all],
|
||
|
|
link:recvfrom.html[recvfrom],
|
||
|
|
link:send.html[send],
|
||
|
|
link:send_all.html[send_all],
|
||
|
|
link:send_string.html[send_string]
|