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Code Issues Releases Activity

Added new method to UDP to take a hostname rather than an IP address. Part of issue 243

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This commit is contained in:
amcewen 2011-02-04 21:15:42 +00:00 committed by David A. Mellis
parent abfe299bfd
commit a9c2ebf455
2 changed files with 20 additions and 0 deletions
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17
libraries/Ethernet/Udp.cpp
View File

@ -30,6 +30,7 @@
#include "socket.h" #include "socket.h"
#include "Ethernet.h" #include "Ethernet.h"
#include "Udp.h" #include "Udp.h"
#include "Dns.h"
/* Constructor */ /* Constructor */
UDP::UDP() : _sock(MAX_SOCK_NUM) {} UDP::UDP() : _sock(MAX_SOCK_NUM) {}
@ -74,6 +75,22 @@ void UDP::stop()
_sock = MAX_SOCK_NUM; _sock = MAX_SOCK_NUM;
} }
int UDP::beginPacket(const char *host, uint16_t port)
{
// Look up the host first
int ret = 0;
DNSClient dns;
IPAddress remote_addr;
dns.begin(Ethernet.dnsServerIP());
ret = dns.getHostByName(host, remote_addr);
if (ret == 1) {
return beginPacket(remote_addr, port);
} else {
return ret;
}
}
int UDP::beginPacket(IPAddress ip, uint16_t port) int UDP::beginPacket(IPAddress ip, uint16_t port)
{ {
_offset = 0; _offset = 0;

3
libraries/Ethernet/Udp.h
View File

@ -60,6 +60,9 @@ public:
// Start building up a packet to send to the remote host specific in ip and port // Start building up a packet to send to the remote host specific in ip and port
// Returns 1 if successful, 0 if there was a problem with the supplied IP address or port // Returns 1 if successful, 0 if there was a problem with the supplied IP address or port
int beginPacket(IPAddress ip, uint16_t port); int beginPacket(IPAddress ip, uint16_t port);
// Start building up a packet to send to the remote host specific in host and port
// Returns 1 if successful, 0 if there was a problem resolving the hostname or port
int beginPacket(const char *host, uint16_t port);
// Finish off this packet and send it // Finish off this packet and send it
// Returns 1 if the packet was sent successfully, 0 if there was an error // Returns 1 if the packet was sent successfully, 0 if there was an error
int endPacket(); int endPacket();