comparison: sources/network/udp.cpp
sources/network/udp.cpp
- changeset 5
- 146825d63b9a
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| 4:ec5387e121fa | 5:146825d63b9a |
|---|---|
| 1 #include <sys/socket.h> | |
| 2 #include <sys/types.h> | |
| 3 #include <sys/time.h> | |
| 4 #include <netinet/in.h> | |
| 5 #include <string.h> | |
| 6 #include <fcntl.h> | |
| 7 #include "udp.h" | |
| 8 | |
| 9 // ----------------------------------------------------------------------------- | |
| 10 // | |
| 11 UDPSocket::UDPSocket() : | |
| 12 m_socket (socket (AF_INET, SOCK_DGRAM, 0)) {} | |
| 13 | |
| 14 // ----------------------------------------------------------------------------- | |
| 15 // | |
| 16 UDPSocket::~UDPSocket() {} | |
| 17 | |
| 18 // ------------------------------------------------------------------------------------------------- | |
| 19 // | |
| 20 METHOD | |
| 21 UDPSocket::set_blocking (bool a) -> bool | |
| 22 { | |
| 23 int flags = fcntl (m_socket, F_GETFL, 0); | |
| 24 int newflags = (a ? (flags | O_NONBLOCK) : (flags & ~O_NONBLOCK)); | |
| 25 | |
| 26 if (flags < 0 || fcntl (m_socket, F_SETFL, newflags) != 0) | |
| 27 { | |
| 28 m_error = "Unable to set socket as non-blocking"; | |
| 29 return false; | |
| 30 } | |
| 31 | |
| 32 return true; | |
| 33 } | |
| 34 | |
| 35 // ------------------------------------------------------------------------------------------------- | |
| 36 // | |
| 37 METHOD | |
| 38 UDPSocket::bind (unsigned short port) -> bool | |
| 39 { | |
| 40 struct sockaddr_in svaddr; | |
| 41 memset (&svaddr, 0, sizeof svaddr); | |
| 42 svaddr.sin_family = AF_INET; | |
| 43 svaddr.sin_port = htons (port); | |
| 44 svaddr.sin_addr.s_addr = htonl (INADDR_ANY); | |
| 45 | |
| 46 if (::bind (m_socket, reinterpret_cast<struct sockaddr*> (&svaddr), sizeof svaddr) == -1) | |
| 47 { | |
| 48 m_error = String ("Couldn't bind to port ") + String::from_number (port); | |
| 49 return false; | |
| 50 } | |
| 51 | |
| 52 return true; | |
| 53 } | |
| 54 | |
| 55 // ------------------------------------------------------------------------------------------------- | |
| 56 // | |
| 57 METHOD | |
| 58 UDPSocket::read (Datagram& datagram) -> bool | |
| 59 { | |
| 60 sockaddr_in claddr; | |
| 61 socklen_t socklen = sizeof claddr; | |
| 62 static unsigned char packet[MAX_DATAGRAM_LENGTH]; | |
| 63 int length = ::recvfrom (m_socket, packet, sizeof packet, 0, | |
| 64 reinterpret_cast<struct sockaddr*> (&claddr), &socklen); | |
| 65 | |
| 66 if (length == -1) | |
| 67 { | |
| 68 // We got an error, though EWOULDBLOCK is silent as it means no packets recieved. | |
| 69 if (errno != EWOULDBLOCK) | |
| 70 m_error.sprintf ("recvfrom error: %s", strerror (errno));; | |
| 71 | |
| 72 return false; | |
| 73 } | |
| 74 | |
| 75 datagram.from.host = ntohl (claddr.sin_addr.s_addr); | |
| 76 datagram.from.port = ntohs (claddr.sin_port); | |
| 77 datagram.data = Bytestream (packet, length); | |
| 78 return true; | |
| 79 } | |
| 80 | |
| 81 // ------------------------------------------------------------------------------------------------- | |
| 82 // | |
| 83 METHOD | |
| 84 UDPSocket::send (const Bytestream& data, const IPAddress& addr) -> bool | |
| 85 { | |
| 86 struct sockaddr_in claddr = addr.to_sockaddr_in(); | |
| 87 | |
| 88 int res = ::sendto (m_socket, data.data(), data.written_length(), 0, | |
| 89 reinterpret_cast<struct sockaddr*> (&claddr), sizeof claddr); | |
| 90 | |
| 91 if (res == -1) | |
| 92 { | |
| 93 m_error = String ("Unable to launch packet: ") + strerror (errno); | |
| 94 return false; | |
| 95 } | |
| 96 | |
| 97 return true; | |
| 98 } |
