src/osctlnet.cpp

   1 /* Calf DSP Library
   2  * Open Sound Control UDP support
   3  *
   4  * Copyright (C) 2007-2009 Krzysztof Foltman
   5  *
   6  * This program is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2 of the License, or (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General
  17  * Public License along with this program; if not, write to the
  18  * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  19  * Boston, MA  02110-1301  USA
  20  */
  21 #include <calf/osctl.h>
  22 #include <calf/osctlnet.h>
  23 #include <assert.h>
  24 #include <arpa/inet.h>
  25 #include <sys/socket.h>
  26 #include <stdlib.h>
  27 #include <sstream>
  28 #include <stdio.h>
  29 using namespace osctl;
  30 using namespace std;
  31
  32 void osc_socket::bind(const char *hostaddr, int port)
  33 {
  34     socket = ::socket(PF_INET, SOCK_DGRAM, 0);
  35     if (socket < 0)
  36         throw osc_net_exception("socket");
  37
  38     sockaddr_in sadr;
  39     sadr.sin_family = AF_INET;
  40     sadr.sin_port = htons(port);
  41     inet_aton(hostaddr, &sadr.sin_addr);
  42     if (::bind(socket, (sockaddr *)&sadr, sizeof(sadr)) < 0)
  43         throw osc_net_exception("bind");
  44     on_bind();
  45 }
  46
  47 std::string osc_socket::get_uri() const
  48 {
  49     sockaddr_in sadr;
  50     socklen_t len = sizeof(sadr);
  51     if (getsockname(socket, (sockaddr *)&sadr, &len) < 0)
  52         throw osc_net_exception("getsockname");
  53
  54     char name[INET_ADDRSTRLEN], buf[32];
  55
  56     inet_ntop(AF_INET, &sadr.sin_addr, name, INET_ADDRSTRLEN);
  57     sprintf(buf, "%d", ntohs(sadr.sin_port));
  58
  59     return string("osc.udp://") + name + ":" + buf + prefix;
  60 }
  61
  62 osc_socket::~osc_socket()
  63 {
  64     close(socket);
  65 }
  66
  67 //////////////////////////////////////////////////////////////
  68
  69 void osc_client::set_addr(const char *hostaddr, int port)
  70 {
  71     addr.sin_family = AF_INET;
  72     addr.sin_port = htons(port);
  73     inet_aton(hostaddr, &addr.sin_addr);
  74 }
  75
  76 void osc_client::set_url(const char *url)
  77 {
  78     if (strncmp(url, "osc.udp://", 10))
  79         throw osc_net_bad_address(url);
  80     url += 10;
  81
  82     const char *pos = strchr(url, ':');
  83     const char *pos2 = strchr(url, '/');
  84     if (!pos || !pos2)
  85         throw osc_net_bad_address(url);
  86
  87     // XXXKF perhaps there is a default port for osc.udp?
  88     if (pos2 - pos < 0)
  89         throw osc_net_bad_address(url);
  90
  91     string hostname = string(url, pos - url);
  92     int port = atoi(pos + 1);
  93     prefix = string(pos2);
  94     printf("hostname %s port %d\n", hostname.c_str(), port);
  95
  96     addr.sin_family = AF_INET;
  97     addr.sin_port = htons(port);
  98
  99     hostent *he = gethostbyname(hostname.c_str());
 100     if (!he)
 101         throw osc_net_dns_exception("gethostbyname");
 102
 103     addr.sin_addr = *(struct in_addr *)he->h_addr;
 104 }
 105
 106 bool osc_client::send(const std::string &address, osctl::osc_typed_strstream &stream)
 107 {
 108     std::string type_tag = "," + stream.type_buffer->data;
 109     osc_inline_strstream hdr;
 110     hdr << prefix + address << "," + stream.type_buffer->data;
 111     string str = hdr.data + stream.buffer.data;
 112
 113     // printf("sending %s\n", str.buffer.c_str());
 114
 115     return ::sendto(socket, str.data(), str.length(), 0, (sockaddr *)&addr, sizeof(addr)) == (int)str.length();
 116 }
 117
 118 bool osc_client::send(const std::string &address)
 119 {
 120     osc_inline_strstream hdr;
 121     hdr << prefix + address << ",";
 122
 123     return ::sendto(socket, hdr.data.data(), hdr.data.length(), 0, (sockaddr *)&addr, sizeof(addr)) == (int)hdr.data.length();
 124 }
 125