table of contents
socket_send6(3) | Library Functions Manual | socket_send6(3) |
NAME¶
socket_send6 - send a UDP datagramSYNTAX¶
#include <socket.h>ssize_t socket_send6(int s, const char* buf, size_t len, const char ip[16], uint16 port, uint32 scope_id);
DESCRIPTION¶
socket_send6 sends len bytes starting at buf in a UDP datagram over the socket s to UDP port port on IP address ip.You can call socket_send6 without calling socket_bind6. This has the effect as first calling socket_bind6 with IP address :: and port 0.
The meaning of scope_id is dependent on the implementation and IPv6 IP. On link-local IPv6 addresses it specifies the outgoing interface index. The name (e.g. "eth0") for a given interface index can be queried with getifname. scope_id should normally be set to 0.
RETURN VALUE¶
socket_send6 returns 0 if the datagram was sent successfully. If not, it returns -1 and sets errno appropriately.EXAMPLE¶
#include <socket.h>int s; char ip[16]; uint16 p; uint32 scope_id;
s = socket_tcp4(); socket_bind6(s,ip,p); socket_send6(s,"hello, world",12,ip,p,scope_id);