diff options
| -rw-r--r-- | net/udpsend.c | 101 |
1 files changed, 93 insertions, 8 deletions
diff --git a/net/udpsend.c b/net/udpsend.c index 2ce6219..0922c61 100644 --- a/net/udpsend.c +++ b/net/udpsend.c @@ -13,6 +13,7 @@ #ifdef _WIN32 #include <winsock2.h> #include <ws2tcpip.h> +#include <iphlpapi.h> // for interface addresses
#else #include <sys/types.h> #include <sys/socket.h> @@ -94,14 +95,16 @@ Enable sending of broadcast messages (if hostname is a broadcast address)*/ hp = gethostbyname(hostname->s_name); if (hp == 0) { - post("udpsend: bad host?\n"); + post("udpsend: bad host?\n"); return; } memcpy((char *)&server.sin_addr, (char *)hp->h_addr, hp->h_length); if (0xE0000000 == (ntohl(server.sin_addr.s_addr) & 0xF0000000)) post ("udpsend: connecting to a multicast address"); + size = sizeof(multicast_loop_state); getsockopt(sockfd, IPPROTO_IP, IP_MULTICAST_LOOP, &multicast_loop_state, &size); + size = sizeof(multicast_ttl); getsockopt(sockfd, IPPROTO_IP, IP_MULTICAST_TTL, &multicast_ttl, &size); x->x_multicast_loop_state = multicast_loop_state; x->x_multicast_ttl = multicast_ttl; @@ -149,7 +152,89 @@ static void udpsend_set_multicast_ttl(t_udpsend *x, t_floatarg ttl_hops) static void udpsend_set_multicast_interface (t_udpsend *x, t_symbol *s, int argc, t_atom *argv) { #ifdef _WIN32 - post ("udpsend: set multicast interface not implementeed yet"); + int i, n_ifaces = 32;
+ PMIB_IPADDRTABLE pIPAddrTable;
+ DWORD dwSize;
+ DWORD dwRetVal = 0;
+ IN_ADDR IPAddr;
+ LPVOID lpMsgBuf;
+ int if_index = -1;
+ int found = 0;
+ t_symbol *interfacename = gensym("none");
+ struct hostent *hp = 0;
+ struct sockaddr_in server; +
+ if (x->x_fd < 0) + { + pd_error(x, "udpsend_set_multicast_interface: not connected"); + return; + } + switch (argv[0].a_type) + { + case A_FLOAT: + if_index = (int)atom_getfloat(&argv[0]); + break; + case A_SYMBOL: + interfacename = atom_getsymbol(&argv[0]); + break; + default: + pd_error(x, "udpsend_set_multicast_interface: argument not float or symbol"); + return; + } + if (if_index == -1) + { + hp = gethostbyname(interfacename->s_name); // if interface is a dotted or named IP address (192.168.0.88) + } + if (hp != 0) memcpy((char *)&server.sin_addr, (char *)hp->h_addr, hp->h_length); + else // maybe interface is its index (1) (names aren't available in _WIN32) + { + /* get the list of interfaces, IPv4 only */
+ dwSize = sizeof(MIB_IPADDRTABLE)*n_ifaces;
+ if ((pIPAddrTable = (MIB_IPADDRTABLE *) getbytes(dwSize)) == NULL)
+ {
+ post("udpsend: unable to allocate %lu bytes for GetIpAddrTable", dwSize);
+ return;
+ }
+ if ((dwRetVal = GetIpAddrTable(pIPAddrTable, &dwSize, 0)) != NO_ERROR)
+ {
+ post("udpsend: GetIpAddrTable failed with error %d", dwRetVal);
+ if (FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS, NULL, dwRetVal, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), // Default language
+ (LPTSTR) & lpMsgBuf, 0, NULL))
+ {
+ post("udpsend: %s", lpMsgBuf);
+ LocalFree(lpMsgBuf);
+ }
+ return;
+ }
+
+ n_ifaces = pIPAddrTable->dwNumEntries;
+ post("udpsend: %d interface%s available:", n_ifaces, (n_ifaces == 1)?"":"s"); + for (i = 0; i < n_ifaces; i++)
+ {
+ IPAddr.S_un.S_addr = (u_long) pIPAddrTable->table[i].dwAddr;
+ post("[%d]: %s", pIPAddrTable->table[i].dwIndex, inet_ntoa(IPAddr)); + if (pIPAddrTable->table[i].dwIndex == if_index) + { + server.sin_addr = IPAddr; + found = 1; + } + }
+
+ if (pIPAddrTable)
+ {
+ freebytes(pIPAddrTable, dwSize);
+ pIPAddrTable = NULL;
+ }
+ if (! found) + { + post("udpsend_set_multicast_interface: bad host name? (%s)\n", interfacename->s_name); + return; + } + } + if (setsockopt(x->x_fd, IPPROTO_IP, IP_MULTICAST_IF, (const char *)&server.sin_addr, sizeof(struct in_addr)) == SOCKET_ERROR) + sys_sockerror("udpsend_set_multicast_interface: setsockopt"); + else post("udpsend multicast interface is %s", inet_ntoa(server.sin_addr)); + #else struct sockaddr_in server; struct sockaddr *sa; @@ -215,7 +300,7 @@ static void udpsend_set_multicast_interface (t_udpsend *x, t_symbol *s, int argc } freebytes(ifc.ifc_buf, origbuflen); - if (! found) + if (! found) { post("udpsend_set_multicast_interface: bad host name? (%s)\n", interface->s_name); return; @@ -272,16 +357,16 @@ static void udpsend_send(t_udpsend *x, t_symbol *s, int argc, t_atom *argv) pd_error(x, "udpsend_send: item %d (%f) is not an integer", i, f); return; } - c = (unsigned char)d; - if (c != d) + c = (unsigned char)d; + if (c != d) { pd_error(x, "udpsend_send: item %d (%f) is not between 0 and 255", i, f); return; } #ifdef DEBUG - post("udpsend_send: argv[%d]: %d", i, c); + post("udpsend_send: argv[%d]: %d", i, c); #endif - byte_buf[j++] = c; + byte_buf[j++] = c; } else if (argv[i].a_type == A_SYMBOL) { @@ -353,7 +438,7 @@ static void udpsend_send(t_udpsend *x, t_symbol *s, int argc, t_atom *argv) { sent += result; bp += result; - } + } } } else pd_error(x, "udpsend: not connected"); |