From 010723cb02b26c608537fc537d5e963ff6402f9e Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?IOhannes=20m=20zm=C3=B6lnig?= Date: Tue, 23 Mar 2010 11:54:21 +0000 Subject: forked mrpeach's "net" svn path=/trunk/externals/iem/iemnet/; revision=13240 --- tcpserver.c | 1065 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 1065 insertions(+) create mode 100644 tcpserver.c (limited to 'tcpserver.c') diff --git a/tcpserver.c b/tcpserver.c new file mode 100644 index 0000000..5272029 --- /dev/null +++ b/tcpserver.c @@ -0,0 +1,1065 @@ +/* tcpserver.c Martin Peach 20060511 working version 20060512 */ +/* 20060515 works on linux too... */ +/* tcpserver.c is based on netserver: */ +/* -------------------------- netserver ------------------------------------- */ +/* */ +/* A server for bidirectional communication from within Pd. */ +/* Allows to send back data to specific clients connected to the server. */ +/* Written by Olaf Matthes */ +/* Get source at http://www.akustische-kunst.org/puredata/maxlib */ +/* */ +/* This program is free software; you can redistribute it and/or */ +/* modify it under the terms of the GNU General Public License */ +/* as published by the Free Software Foundation; either version 2 */ +/* of the License, or (at your option) any later version. */ +/* */ +/* This program is distributed in the hope that it will be useful, */ +/* but WITHOUT ANY WARRANTY; without even the implied warranty of */ +/* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the */ +/* GNU General Public License for more details. */ +/* */ +/* You should have received a copy of the GNU General Public License */ +/* along with this program; if not, write to the Free Software */ +/* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ +/* */ +/* Based on PureData by Miller Puckette and others. */ +/* */ +/* ---------------------------------------------------------------------------- */ +//define DEBUG + +#include "m_pd.h" +#include "m_imp.h" +#include "s_stuff.h" + +#include +#include +#include +#if defined(UNIX) || defined(unix) +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include /* linux has the SIOCOUTQ ioctl */ +#define SOCKET_ERROR -1 +#else +#include +#endif + + +#ifdef _MSC_VER +#define snprintf sprintf_s +#endif + +#define MAX_CONNECT 32 /* maximum number of connections */ +#define INBUFSIZE 65536L /* was 4096: size of receiving data buffer */ +#define MAX_UDP_RECEIVE 65536L /* longer than data in maximum UDP packet */ + +/* ----------------------------- tcpserver ------------------------- */ + +static t_class *tcpserver_class; +static char objName[] = "tcpserver"; + +typedef void (*t_tcpserver_socketnotifier)(void *x); +typedef void (*t_tcpserver_socketreceivefn)(void *x, t_binbuf *b); + +typedef struct _tcpserver_socketreceiver +{ + t_symbol *sr_host; + t_int sr_fd; + t_int sr_fdbuf; + u_long sr_addr; + unsigned char *sr_inbuf; + int sr_inhead; + int sr_intail; + void *sr_owner; + t_tcpserver_socketnotifier sr_notifier; + t_tcpserver_socketreceivefn sr_socketreceivefn; +} t_tcpserver_socketreceiver; + +typedef struct _tcpserver_send_params +{ + int client; + int sockfd; + char *byte_buf; + size_t length; + t_int timeout_us; +} t_tcpserver_send_params; + +typedef struct _tcpserver +{ + t_object x_obj; + t_outlet *x_msgout; + t_outlet *x_connectout; + t_outlet *x_sockout; + t_outlet *x_addrout; + t_outlet *x_status_outlet; + t_int x_dump; // 1 = hexdump received bytes + + t_tcpserver_socketreceiver *x_sr[MAX_CONNECT]; + + t_atom x_addrbytes[4]; + t_int x_sock_fd; + t_int x_connectsocket; + t_int x_nconnections; + t_int x_timeout_us; + t_atom x_msgoutbuf[MAX_UDP_RECEIVE]; + char x_msginbuf[MAX_UDP_RECEIVE]; +} t_tcpserver; + +static t_tcpserver_socketreceiver *tcpserver_socketreceiver_new(void *owner, t_tcpserver_socketnotifier notifier, + t_tcpserver_socketreceivefn socketreceivefn); +static int tcpserver_socketreceiver_doread(t_tcpserver_socketreceiver *x); +static void tcpserver_socketreceiver_read(t_tcpserver_socketreceiver *x, int fd); +static void tcpserver_socketreceiver_free(t_tcpserver_socketreceiver *x); +static void tcpserver_send(t_tcpserver *x, t_symbol *s, int argc, t_atom *argv); +static void tcpserver_send_bytes(int sockfd, t_tcpserver *x, int argc, t_atom *argv); +#ifdef SIOCOUTQ +static int tcpserver_send_buffer_avaliable_for_client(t_tcpserver *x, int client); +#endif +static void *tcpserver_send_buf_thread(void *arg); +static size_t tcpserver_send_buf(int client, int sockfd, char *byte_buf, size_t length, t_int timeout_us); +static void tcpserver_client_send(t_tcpserver *x, t_symbol *s, int argc, t_atom *argv); +static void tcpserver_output_client_state(t_tcpserver *x, int client); +static int tcpserver_get_socket_send_buf_size(int sockfd); +static int tcpserver_set_socket_send_buf_size(int sockfd, int size); +static void tcpserver_buf_size(t_tcpserver *x, t_symbol *s, int argc, t_atom *argv); +static void tcpserver_disconnect(t_tcpserver *x); +static void tcpserver_client_disconnect(t_tcpserver *x, t_floatarg fclient); +static void tcpserver_socket_disconnect(t_tcpserver *x, t_floatarg fsocket); +static void tcpserver_broadcast(t_tcpserver *x, t_symbol *s, int argc, t_atom *argv); +static void tcpserver_notify(t_tcpserver *x); +static void tcpserver_connectpoll(t_tcpserver *x); +static void tcpserver_print(t_tcpserver *x); +static void *tcpserver_new(t_floatarg fportno); +static void tcpserver_free(t_tcpserver *x); +void tcpserver_setup(void); +static void tcpserver_dump(t_tcpserver *x, t_float dump); +static void tcpserver_timeout(t_tcpserver *x, t_float timeout); +static void tcpserver_hexdump(unsigned char *buf, long len); + +static void tcpserver_timeout(t_tcpserver *x, t_float timeout) +{ + /* set the timeout on the select call in tcpserver_send_buf */ + /* this is the maximum time in microseconds to wait */ + /* before abandoning attempt to send */ + + t_int timeout_us = 0; + if ((timeout >= 0)&&(timeout < 1000000)) + { + timeout_us = (t_int)timeout; + x->x_timeout_us = timeout_us; + } +} + +static void tcpserver_dump(t_tcpserver *x, t_float dump) +{ + x->x_dump = (dump == 0)?0:1; +} + +static void tcpserver_hexdump(unsigned char *buf, long len) +{ +#define BYTES_PER_LINE 16 + char hexStr[(3*BYTES_PER_LINE)+1]; + char ascStr[BYTES_PER_LINE+1]; + long i, j, k = 0L; +#ifdef DEBUG + post("tcpserver_hexdump %d", len); +#endif + while (k < len) + { + for (i = j = 0; i < BYTES_PER_LINE; ++i, ++k, j+=3) + { + if (k < len) + { + snprintf(&hexStr[j], 4, "%02X ", buf[k]); + snprintf(&ascStr[i], 2, "%c", ((buf[k] >= 32) && (buf[k] <= 126))? buf[k]: '.'); + } + else + { // the last line + snprintf(&hexStr[j], 4, " "); + snprintf(&ascStr[i], 2, " "); + } + } + post ("%s%s", hexStr, ascStr); + } +} + +static t_tcpserver_socketreceiver *tcpserver_socketreceiver_new(void *owner, t_tcpserver_socketnotifier notifier, + t_tcpserver_socketreceivefn socketreceivefn) +{ + t_tcpserver_socketreceiver *x = (t_tcpserver_socketreceiver *)getbytes(sizeof(*x)); + if (!x) + { + error("%s_socketreceiver: unable to allocate %d bytes", objName, sizeof(*x)); + } + else + { + x->sr_inhead = x->sr_intail = 0; + x->sr_owner = owner; + x->sr_notifier = notifier; + x->sr_socketreceivefn = socketreceivefn; + if (!(x->sr_inbuf = malloc(INBUFSIZE))) + { + freebytes(x, sizeof(*x)); + x = NULL; + error("%s_socketreceiver: unable to allocate %ld bytes", objName, INBUFSIZE); + } + } + return (x); +} + +/* this is in a separately called subroutine so that the buffer isn't + sitting on the stack while the messages are getting passed. */ +static int tcpserver_socketreceiver_doread(t_tcpserver_socketreceiver *x) +{ + char messbuf[INBUFSIZE]; + char *bp = messbuf; + int indx, i; + int inhead = x->sr_inhead; + int intail = x->sr_intail; + unsigned char c; + t_tcpserver *y = x->sr_owner; + unsigned char *inbuf = x->sr_inbuf; + + if (intail == inhead) return (0); +#ifdef DEBUG + post ("%s_socketreceiver_doread: intail=%d inhead=%d", objName, intail, inhead); +#endif + + for (indx = intail, i = 0; indx != inhead; indx = (indx+1)&(INBUFSIZE-1), ++i) + { + c = *bp++ = inbuf[indx]; + y->x_msgoutbuf[i].a_w.w_float = (float)c; + } + + if (y->x_dump)tcpserver_hexdump(&inbuf[intail], i); + + if (i > 1) outlet_list(y->x_msgout, &s_list, i, y->x_msgoutbuf); + else outlet_float(y->x_msgout, y->x_msgoutbuf[0].a_w.w_float); + + // intail = (indx+1)&(INBUFSIZE-1); + x->sr_inhead = inhead; + x->sr_intail = indx;//intail; + return (1); +} + +static void tcpserver_socketreceiver_read(t_tcpserver_socketreceiver *x, int fd) +{ + int readto = (x->sr_inhead >= x->sr_intail ? INBUFSIZE : x->sr_intail-1); + int ret, i; + t_tcpserver *y = x->sr_owner; + + y->x_sock_fd = fd; + /* the input buffer might be full. If so, drop the whole thing */ + if (readto == x->sr_inhead) + { + post("%s: dropped message", objName); + x->sr_inhead = x->sr_intail = 0; + readto = INBUFSIZE; + } + else + { + ret = recv(fd, x->sr_inbuf + x->sr_inhead, + readto - x->sr_inhead, 0); + if (ret < 0) + { + sys_sockerror("tcpserver: recv"); + if (x->sr_notifier) (*x->sr_notifier)(x->sr_owner); + sys_rmpollfn(fd); + sys_closesocket(fd); + } + else if (ret == 0) + { + post("%s: connection closed on socket %d", objName, fd); + if (x->sr_notifier) (*x->sr_notifier)(x->sr_owner); + sys_rmpollfn(fd); + sys_closesocket(fd); + } + else + { +#ifdef DEBUG + post ("%s_socketreceiver_read: ret = %d", objName, ret); +#endif + x->sr_inhead += ret; + if (x->sr_inhead >= INBUFSIZE) x->sr_inhead = 0; + /* output client's IP and socket no. */ + for(i = 0; i < y->x_nconnections; i++) /* search for corresponding IP */ + { + if(y->x_sr[i]->sr_fd == y->x_sock_fd) + { +// outlet_symbol(x->x_connectionip, x->x_sr[i].sr_host); + /* find sender's ip address and output it */ + y->x_addrbytes[0].a_w.w_float = (y->x_sr[i]->sr_addr & 0xFF000000)>>24; + y->x_addrbytes[1].a_w.w_float = (y->x_sr[i]->sr_addr & 0x0FF0000)>>16; + y->x_addrbytes[2].a_w.w_float = (y->x_sr[i]->sr_addr & 0x0FF00)>>8; + y->x_addrbytes[3].a_w.w_float = (y->x_sr[i]->sr_addr & 0x0FF); + outlet_list(y->x_addrout, &s_list, 4L, y->x_addrbytes); + break; + } + } + outlet_float(y->x_sockout, y->x_sock_fd); /* the socket number */ + tcpserver_socketreceiver_doread(x); + } + } +} + +static void tcpserver_socketreceiver_free(t_tcpserver_socketreceiver *x) +{ + if (x != NULL) + { + free(x->sr_inbuf); + freebytes(x, sizeof(*x)); + } +} + +/* ---------------- main tcpserver (send) stuff --------------------- */ + +static void tcpserver_send_bytes(int client, t_tcpserver *x, int argc, t_atom *argv) +{ + static char byte_buf[MAX_UDP_RECEIVE];// arbitrary maximum similar to max IP packet size + int i, j, d; + unsigned char c; + float f, e; + int length; + size_t flen = 0; + int sockfd = x->x_sr[client]->sr_fd; + char fpath[FILENAME_MAX]; + FILE *fptr; + t_atom output_atom[3]; + t_tcpserver_send_params *ttsp; + pthread_t sender_thread; + pthread_attr_t sender_attr; + int sender_thread_result; + + /* process & send data */ + if(sockfd >= 0) + { + /* sender thread should start out detached so its resouces will be freed when it is done */ + if (0!= (sender_thread_result = pthread_attr_init(&sender_attr))) + { + error("%s: pthread_attr_init failed: %d", objName, sender_thread_result); + goto failed; + } + if(0!= (sender_thread_result = pthread_attr_setdetachstate(&sender_attr, PTHREAD_CREATE_DETACHED))) + { + error("%s: pthread_attr_setdetachstate failed: %d", objName, sender_thread_result); + goto failed; + } + for (i = j = 0; i < argc; ++i) + { + if (argv[i].a_type == A_FLOAT) + { /* load floats into buffer as long as they are integers on [0..255]*/ + f = argv[i].a_w.w_float; + d = (int)f; + e = f - d; +#ifdef DEBUG + post("%s: argv[%d]: float:%f int:%d delta:%f", objName, i, f, d, e); +#endif + if (e != 0) + { + error("%s: item %d (%f) is not an integer", objName, i, f); + goto failed; + } + if ((d < 0) || (d > 255)) + { + error("%s: item %d (%f) is not between 0 and 255", objName, i, f); + goto failed; + } + c = (unsigned char)d; /* make sure it doesn't become negative; this only matters for post() */ +#ifdef DEBUG + post("%s: argv[%d]: %d", objName, i, c); +#endif + byte_buf[j++] = c; + if (j >= MAX_UDP_RECEIVE) + { /* if the argument list is longer than our buffer, send the buffer whenever it's full */ +#ifdef SIOCOUTQ + if (tcpserver_send_buffer_avaliable_for_client(x, client) < j) + { + error("%s: buffer too small for client(%d)", objName, client); + goto failed; + } +#endif // SIOCOUTQ + ttsp = (t_tcpserver_send_params *)getbytes(sizeof(t_tcpserver_send_params)); + if (ttsp == NULL) + { + error("%s: unable to allocate %d bytes for t_tcpserver_send_params", objName, sizeof(t_tcpserver_send_params)); + goto failed; + } + ttsp->client = client; + ttsp->sockfd = sockfd; + ttsp->byte_buf = byte_buf; + ttsp->length = j; + ttsp->timeout_us = x->x_timeout_us; + if (0 != (sender_thread_result = pthread_create(&sender_thread, &sender_attr, tcpserver_send_buf_thread, (void *)ttsp))) + { + error("%s: couldn't create sender thread (%d)", objName, sender_thread_result); + goto failed; + } + flen += j; + j = 0; + } + } + else if (argv[i].a_type == A_SYMBOL) + { /* symbols are interpreted to be file names; attempt to load the file and send it */ + + atom_string(&argv[i], fpath, FILENAME_MAX); +#ifdef DEBUG + post ("%s: fname: %s", objName, fpath); +#endif + fptr = fopen(fpath, "rb"); + if (fptr == NULL) + { + error("%s: unable to open \"%s\"", objName, fpath); + goto failed; + } + rewind(fptr); +#ifdef DEBUG + post("%s: d is %d", objName, d); +#endif + while ((d = fgetc(fptr)) != EOF) + { + byte_buf[j++] = (char)(d & 0x0FF); +#ifdef DEBUG + post("%s: byte_buf[%d] = %d", objName, j-1, byte_buf[j-1]); +#endif + if (j >= MAX_UDP_RECEIVE) + { /* if the file is longer than our buffer, send the buffer whenever it's full */ + /* this might be better than allocating huge amounts of memory */ +#ifdef SIOCOUTQ + if (tcpserver_send_buffer_avaliable_for_client(x, client) < j) + { + error("%s: buffer too small for client(%d)", objName, client); + goto failed; + } +#endif // SIOCOUTQ + ttsp = (t_tcpserver_send_params *)getbytes(sizeof(t_tcpserver_send_params)); + if (ttsp == NULL) + { + error("%s: unable to allocate %d bytes for t_tcpserver_send_params", objName, sizeof(t_tcpserver_send_params)); + goto failed; + } + ttsp->client = client; + ttsp->sockfd = sockfd; + ttsp->byte_buf = byte_buf; + ttsp->length = j; + ttsp->timeout_us = x->x_timeout_us; + if ( 0!= (sender_thread_result = pthread_create(&sender_thread, &sender_attr, tcpserver_send_buf_thread, (void *)ttsp))) + { + error("%s: couldn't create sender thread (%d)", objName, sender_thread_result); + goto failed; + } + flen += j; + j = 0; + } + } + flen += j; + fclose(fptr); + fptr = NULL; + post("%s: read \"%s\" length %d byte%s", objName, fpath, flen, ((d==1)?"":"s")); + } + else + { /* arg was neither a float nor a valid file name */ + error("%s: item %d is not a float or a file name", objName, i); + goto failed; + } + } + length = j; + if (length > 0) + { /* send whatever remains in our buffer */ +#ifdef SIOCOUTQ + if (tcpserver_send_buffer_avaliable_for_client(x, client) < length) + { + error("%s: buffer too small for client(%d)", objName, client); + goto failed; + } +#endif // SIOCOUTQ + ttsp = (t_tcpserver_send_params *)getbytes(sizeof(t_tcpserver_send_params)); + if (ttsp == NULL) + { + error("%s: unable to allocate %d bytes for t_tcpserver_send_params", objName, sizeof(t_tcpserver_send_params)); + goto failed; + } + ttsp->client = client; + ttsp->sockfd = sockfd; + ttsp->byte_buf = byte_buf; + ttsp->length = length; + ttsp->timeout_us = x->x_timeout_us; + if ( 0!= (sender_thread_result = pthread_create(&sender_thread, &sender_attr, tcpserver_send_buf_thread, (void *)ttsp))) + { + error("%s: couldn't create sender thread (%d)", objName, sender_thread_result); + goto failed; + } + flen += length; + } + } + else post("%s: not a valid socket number (%d)", objName, sockfd); +failed: + SETFLOAT(&output_atom[0], client+1); + SETFLOAT(&output_atom[1], flen); + SETFLOAT(&output_atom[2], sockfd); + outlet_anything( x->x_status_outlet, gensym("sent"), 3, output_atom); +} + +#ifdef SIOCOUTQ +/* SIOCOUTQ exists only(?) on linux, returns remaining space in the socket's output buffer */ +static int tcpserver_send_buffer_avaliable_for_client(t_tcpserver *x, int client) +{ + int sockfd = x->x_sr[client].sr_fd; + int result = 0L; + + ioctl(sockfd, SIOCOUTQ, &result); + return result; +} +#endif // SIOCOUTQ + +// send a buffer in its own thread +static void *tcpserver_send_buf_thread(void *arg) +{ + t_tcpserver_send_params *ttsp = (t_tcpserver_send_params *)arg; + int result; + + result = send(ttsp->sockfd, ttsp->byte_buf, ttsp->length, 0); + if (result <= 0) + { + sys_sockerror("tcpserver: send"); + post("%s_send_buf: could not send data to client %d", objName, ttsp->client+1); + } + freebytes (arg, sizeof (t_tcpserver_send_params)); + return NULL; +} + +// send a buffer one byte at a time, no thread +static size_t tcpserver_send_buf(int client, int sockfd, char *byte_buf, size_t length, t_int timeout_us) +{ + char *bp; + size_t sent = 0; + int result; + fd_set wfds; + struct timeval timeout; + + for (bp = byte_buf, sent = 0; sent < length;) + { + FD_ZERO(&wfds); + FD_SET(sockfd, &wfds); + timeout.tv_sec = 0; + timeout.tv_usec = timeout_us; /* give it a short time to clear buffer */ + result = select(sockfd+1, NULL, &wfds, NULL, &timeout); + if (result == -1) + { + post("%s_send_buf: select returned error %d", objName, errno); + break; + } + if (FD_ISSET(sockfd, &wfds)) + { + result = send(sockfd, bp, 1, 0);/*(sockfd, bp, (int)(length-sent), 0);*/ + if (result <= 0) + { + sys_sockerror("tcpserver: send"); + post("%s_send_buf: could not send data to client %d", objName, client+1); + break; + } + else + { + sent += result; + bp += result; + } + } + else + { + post ("%s_send_buf: can't send right now, sent %lu of %lu", objName, sent, length); + return sent;/* abandon any further attempts to send so we don't block */ + } + } + return sent; +} + +/* send message to client using socket number */ +static void tcpserver_send(t_tcpserver *x, t_symbol *s, int argc, t_atom *argv) +{ + int i, sockfd; + int client = -1; + + if(x->x_nconnections <= 0) + { + post("%s_send: no clients connected", objName); + return; + } + if(argc == 0) /* no socket specified: output state of all sockets */ + { + tcpserver_output_client_state(x, client); + return; + } + /* get socket number of connection (first element in list) */ + if(argv[0].a_type == A_FLOAT) + { + sockfd = atom_getfloatarg(0, argc, argv); + for(i = 0; i < x->x_nconnections; i++) /* check if connection exists */ + { + if(x->x_sr[i]->sr_fd == sockfd) + { + client = i; /* the client we're sending to */ + break; + } + } + if(client == -1) + { + post("%s_send: no connection on socket %d", objName, sockfd); + return; + } + } + else + { + post("%s_send: no socket specified", objName); + return; + } + if (argc < 2) /* nothing to send: output state of this socket */ + { + tcpserver_output_client_state(x, client+1); + return; + } + tcpserver_send_bytes(client, x, argc-1, &argv[1]); +} + +/* disconnect the client at x_sock_fd */ +static void tcpserver_disconnect(t_tcpserver *x) +{ + int i, fd; + t_tcpserver_socketreceiver *y; + + if (x->x_sock_fd >= 0) + { + /* find the socketreceiver for this socket */ + for(i = 0; i < x->x_nconnections; i++) + { + if(x->x_sr[i]->sr_fd == x->x_sock_fd) + { + y = x->x_sr[i]; + fd = y->sr_fd; + if (y->sr_notifier) (*y->sr_notifier)(x); + sys_rmpollfn(fd); + sys_closesocket(fd); + x->x_sock_fd = -1; + return; + } + } + } + post("%s__disconnect: no connection on socket %d", objName, x->x_sock_fd); +} + +/* disconnect a client by socket */ +static void tcpserver_socket_disconnect(t_tcpserver *x, t_floatarg fsocket) +{ + int sock = (int)fsocket; + + if(x->x_nconnections <= 0) + { + post("%s_socket_disconnect: no clients connected", objName); + return; + } + x->x_sock_fd = sock; + tcpserver_disconnect(x); +} + +/* disconnect a client by number */ +static void tcpserver_client_disconnect(t_tcpserver *x, t_floatarg fclient) +{ + int client = (int)fclient; + + if(x->x_nconnections <= 0) + { + post("%s_client_disconnect: no clients connected", objName); + return; + } + if (!((client > 0) && (client < MAX_CONNECT))) + { + post("%s: client %d out of range [1..%d]", objName, client, MAX_CONNECT); + return; + } + --client;/* zero based index*/ + x->x_sock_fd = x->x_sr[client]->sr_fd; + tcpserver_disconnect(x); +} + + +/* send message to client using client number + note that the client numbers might change in case a client disconnects! */ +/* clients start at 1 but our index starts at 0 */ +static void tcpserver_client_send(t_tcpserver *x, t_symbol *s, int argc, t_atom *argv) +{ + int client = -1; + + if(x->x_nconnections <= 0) + { + post("%s_client_send: no clients connected", objName); + return; + } + if(argc > 0) + { + /* get number of client (first element in list) */ + if(argv[0].a_type == A_FLOAT) + client = atom_getfloatarg(0, argc, argv); + else + { + post("%s_client_send: specify client by number", objName); + return; + } + if (!((client > 0) && (client < MAX_CONNECT))) + { + post("%s_client_send: client %d out of range [1..%d]", objName, client, MAX_CONNECT); + return; + } + } + if (argc > 1) + { + --client;/* zero based index*/ + tcpserver_send_bytes(client, x, argc-1, &argv[1]); + return; + } + tcpserver_output_client_state(x, client); +} + +static void tcpserver_output_client_state(t_tcpserver *x, int client) +{ + t_atom output_atom[4]; + + if (client == -1) + { + /* output parameters of all connections via status outlet */ + for(client = 0; client < x->x_nconnections; client++) + { + x->x_sr[client]->sr_fdbuf = tcpserver_get_socket_send_buf_size(x->x_sr[client]->sr_fd); + SETFLOAT(&output_atom[0], client+1); + SETFLOAT(&output_atom[1], x->x_sr[client]->sr_fd); + output_atom[2].a_type = A_SYMBOL; + output_atom[2].a_w.w_symbol = x->x_sr[client]->sr_host; + SETFLOAT(&output_atom[3], x->x_sr[client]->sr_fdbuf); + outlet_anything( x->x_status_outlet, gensym("client"), 4, output_atom); + } + } + else + { + client -= 1;/* zero-based client index conflicts with 1-based user index !!! */ + /* output client parameters via status outlet */ + x->x_sr[client]->sr_fdbuf = tcpserver_get_socket_send_buf_size(x->x_sr[client]->sr_fd); + SETFLOAT(&output_atom[0], client+1);/* user sees client 0 as 1 */ + SETFLOAT(&output_atom[1], x->x_sr[client]->sr_fd); + output_atom[2].a_type = A_SYMBOL; + output_atom[2].a_w.w_symbol = x->x_sr[client]->sr_host; + SETFLOAT(&output_atom[3], x->x_sr[client]->sr_fdbuf); + outlet_anything( x->x_status_outlet, gensym("client"), 4, output_atom); + } +} + +/* Return the send buffer size of socket */ +static int tcpserver_get_socket_send_buf_size(int sockfd) +{ + int optVal = 0; + unsigned int optLen = sizeof(int); +#ifdef _WIN32 + if (getsockopt(sockfd, SOL_SOCKET, SO_SNDBUF, (char*)&optVal, &optLen) == SOCKET_ERROR) + post("%_get_socket_send_buf_size: getsockopt returned %d\n", objName, WSAGetLastError()); +#else + if (getsockopt(sockfd, SOL_SOCKET, SO_SNDBUF, (char*)&optVal, &optLen) == -1) + post("%_get_socket_send_buf_size: getsockopt returned %d\n", objName, errno); +#endif + return optVal; +} + +/* Set the send buffer size of socket, returns actual size */ +static int tcpserver_set_socket_send_buf_size(int sockfd, int size) +{ + int optVal = size; + int optLen = sizeof(int); +#ifdef _WIN32 + if (setsockopt(sockfd, SOL_SOCKET, SO_SNDBUF, (char*)&optVal, optLen) == SOCKET_ERROR) + { + post("%s_set_socket_send_buf_size: setsockopt returned %d\n", objName, WSAGetLastError()); +#else + if (setsockopt(sockfd, SOL_SOCKET, SO_SNDBUF, (char*)&optVal, optLen) == -1) + { + post("%s_set_socket_send_buf_size: setsockopt returned %d\n", objName, errno); +#endif + return 0; + } + else return (tcpserver_get_socket_send_buf_size(sockfd)); +} + +/* Get/set the send buffer of client socket */ +static void tcpserver_buf_size(t_tcpserver *x, t_symbol *s, int argc, t_atom *argv) +{ + int client = -1; + float buf_size = 0; + t_atom output_atom[3]; + + if(x->x_nconnections <= 0) + { + post("%s_buf_size: no clients connected", objName); + return; + } + /* get number of client (first element in list) */ + if (argc > 0) + { + if (argv[0].a_type == A_FLOAT) + client = atom_getfloatarg(0, argc, argv); + else + { + post("%s_buf_size: specify client by number", objName); + return; + } + if (!((client > 0) && (client < MAX_CONNECT))) + { + post("%s__buf_size: client %d out of range [1..%d]", objName, client, MAX_CONNECT); + return; + } + } + if (argc > 1) + { + if (argv[1].a_type != A_FLOAT) + { + post("%s_buf_size: specify buffer size with a float", objName); + return; + } + buf_size = atom_getfloatarg(1, argc, argv); + --client;/* zero based index*/ + x->x_sr[client]->sr_fdbuf = tcpserver_set_socket_send_buf_size(x->x_sr[client]->sr_fd, (int)buf_size); + post("%s_buf_size: client %d set to %d", objName, client+1, x->x_sr[client]->sr_fdbuf); + return; + } + post("%s_buf_size: specify client and buffer size", objName); + return; +} + +/* broadcasts a message to all connected clients */ +static void tcpserver_broadcast(t_tcpserver *x, t_symbol *s, int argc, t_atom *argv) +{ + int client; + /* enumerate through the clients and send each the message */ + for(client = 0; client < x->x_nconnections; client++) /* check if connection exists */ + { + if(x->x_sr[client]->sr_fd >= 0) + { /* socket exists for this client */ + tcpserver_send_bytes(client, x, argc, argv); + } + } +} + +/* ---------------- main tcpserver (receive) stuff --------------------- */ + +static void tcpserver_notify(t_tcpserver *x) +{ + int i, k; + + /* remove connection from list */ + for(i = 0; i < x->x_nconnections; i++) + { + if(x->x_sr[i]->sr_fd == x->x_sock_fd) + { + x->x_nconnections--; + post("%s: \"%s\" removed from list of clients", objName, x->x_sr[i]->sr_host->s_name); + tcpserver_socketreceiver_free(x->x_sr[i]); + x->x_sr[i] = NULL; + + /* rearrange list now: move entries to close the gap */ + for(k = i; k < x->x_nconnections; k++) + { + x->x_sr[k] = x->x_sr[k + 1]; + } + } + } + outlet_float(x->x_connectout, x->x_nconnections); +} + +static void tcpserver_connectpoll(t_tcpserver *x) +{ + struct sockaddr_in incomer_address; + unsigned int sockaddrl = sizeof( struct sockaddr ); + int fd = accept(x->x_connectsocket, (struct sockaddr*)&incomer_address, &sockaddrl); + int i; + int optVal; + unsigned int optLen = sizeof(int); + + if (fd < 0) post("%s: accept failed", objName); + else + { + t_tcpserver_socketreceiver *y = tcpserver_socketreceiver_new((void *)x, + (t_tcpserver_socketnotifier)tcpserver_notify, NULL);/* MP tcpserver_doit isn't used I think...*/ + if (!y) + { +#ifdef _WIN32 + closesocket(fd); +#else + close(fd); +#endif + return; + } + sys_addpollfn(fd, (t_fdpollfn)tcpserver_socketreceiver_read, y); + x->x_nconnections++; + i = x->x_nconnections - 1; + x->x_sr[i] = y; + x->x_sr[i]->sr_host = gensym(inet_ntoa(incomer_address.sin_addr)); + x->x_sr[i]->sr_fd = fd; + post("%s: accepted connection from %s on socket %d", + objName, x->x_sr[i]->sr_host->s_name, x->x_sr[i]->sr_fd); +/* see how big the send buffer is on this socket */ + x->x_sr[i]->sr_fdbuf = 0; +#ifdef _WIN32 + if (getsockopt(x->x_sr[i]->sr_fd, SOL_SOCKET, SO_SNDBUF, (char*)&optVal, &optLen) != SOCKET_ERROR) + { + /* post("%s_connectpoll: send buffer is %ld\n", objName, optVal); */ + x->x_sr[i]->sr_fdbuf = optVal; + } + else post("%s_connectpoll: getsockopt returned %d\n", objName, WSAGetLastError()); +#else + if (getsockopt(x->x_sr[i]->sr_fd, SOL_SOCKET, SO_SNDBUF, (char*)&optVal, &optLen) == 0) + { + /* post("%s_connectpoll: send buffer is %ld\n", objName, optVal); */ + x->x_sr[i]->sr_fdbuf = optVal; + } + else post("%s_connectpoll: getsockopt returned %d\n", objName, errno); +#endif + outlet_float(x->x_connectout, x->x_nconnections); + outlet_float(x->x_sockout, x->x_sr[i]->sr_fd); /* the socket number */ + x->x_sr[i]->sr_addr = ntohl(incomer_address.sin_addr.s_addr); + x->x_addrbytes[0].a_w.w_float = (x->x_sr[i]->sr_addr & 0xFF000000)>>24; + x->x_addrbytes[1].a_w.w_float = (x->x_sr[i]->sr_addr & 0x0FF0000)>>16; + x->x_addrbytes[2].a_w.w_float = (x->x_sr[i]->sr_addr & 0x0FF00)>>8; + x->x_addrbytes[3].a_w.w_float = (x->x_sr[i]->sr_addr & 0x0FF); + outlet_list(x->x_addrout, &s_list, 4L, x->x_addrbytes); + } +} + +static void tcpserver_print(t_tcpserver *x) +{ + int i; + + if(x->x_nconnections > 0) + { + post("%s: %d open connections:", objName, x->x_nconnections); + for(i = 0; i < x->x_nconnections; i++) + { + post(" \"%s\" on socket %d", + x->x_sr[i]->sr_host->s_name, x->x_sr[i]->sr_fd); + } + } + else post("%s: no open connections", objName); +} + +static void *tcpserver_new(t_floatarg fportno) +{ + t_tcpserver *x; + int i; + struct sockaddr_in server; + int sockfd, portno = fportno; + + /* create a socket */ + sockfd = socket(AF_INET, SOCK_STREAM, 0); +#ifdef DEBUG + post("%s: receive socket %d", objName, sockfd); +#endif + if (sockfd < 0) + { + sys_sockerror("tcpserver: socket"); + return (0); + } + server.sin_family = AF_INET; + server.sin_addr.s_addr = INADDR_ANY; +#ifdef IRIX + /* this seems to work only in IRIX but is unnecessary in + Linux. Not sure what NT needs in place of this. */ + if (setsockopt(sockfd, SOL_SOCKET, SO_REUSEADDR, 0, 0) < 0) + post("setsockopt failed\n"); +#endif + /* assign server port number */ + server.sin_port = htons((u_short)portno); + /* name the socket */ + if (bind(sockfd, (struct sockaddr *)&server, sizeof(server)) < 0) + { + sys_sockerror("tcpserver: bind"); + sys_closesocket(sockfd); + return (0); + } + x = (t_tcpserver *)pd_new(tcpserver_class); + x->x_msgout = outlet_new(&x->x_obj, &s_anything); /* 1st outlet for received data */ + /* streaming protocol */ + if (listen(sockfd, 5) < 0) + { + sys_sockerror("tcpserver: listen"); + sys_closesocket(sockfd); + sockfd = -1; + } + else + { + sys_addpollfn(sockfd, (t_fdpollfn)tcpserver_connectpoll, x); + x->x_connectout = outlet_new(&x->x_obj, &s_float); /* 2nd outlet for number of connected clients */ + x->x_sockout = outlet_new(&x->x_obj, &s_float); /* 3rd outlet for socket number of current client */ + x->x_addrout = outlet_new(&x->x_obj, &s_list); /* 4th outlet for ip address of current client */ + x->x_status_outlet = outlet_new(&x->x_obj, &s_anything);/* 5th outlet for everything else */ + } + x->x_connectsocket = sockfd; + x->x_nconnections = 0; + for(i = 0; i < MAX_CONNECT; i++) + { + x->x_sr[i] = NULL; + } + /* prepare to convert the bytes in the buffer to floats in a list */ + for (i = 0; i < MAX_UDP_RECEIVE; ++i) + { + x->x_msgoutbuf[i].a_type = A_FLOAT; + x->x_msgoutbuf[i].a_w.w_float = 0; + } + for (i = 0; i < 4; ++i) + { + x->x_addrbytes[i].a_type = A_FLOAT; + x->x_addrbytes[i].a_w.w_float = 0; + } + x->x_timeout_us = 1000;/* default 1 ms for select call timeout when sending */ + return (x); +} + +static void tcpserver_free(t_tcpserver *x) +{ + int i; + + for(i = 0; i < MAX_CONNECT; i++) + { + + if (NULL!=x->x_sr[i]) { + tcpserver_socketreceiver_free(x->x_sr[i]); + if (x->x_sr[i]->sr_fd >= 0) + { + sys_rmpollfn(x->x_sr[i]->sr_fd); + sys_closesocket(x->x_sr[i]->sr_fd); + } + } + } + if (x->x_connectsocket >= 0) + { + sys_rmpollfn(x->x_connectsocket); + sys_closesocket(x->x_connectsocket); + } + +} + +void tcpserver_setup(void) +{ + tcpserver_class = class_new(gensym(objName),(t_newmethod)tcpserver_new, (t_method)tcpserver_free, + sizeof(t_tcpserver), 0, A_DEFFLOAT, 0); + class_addmethod(tcpserver_class, (t_method)tcpserver_print, gensym("print"), 0); + class_addmethod(tcpserver_class, (t_method)tcpserver_send, gensym("send"), A_GIMME, 0); + class_addmethod(tcpserver_class, (t_method)tcpserver_client_send, gensym("client"), A_GIMME, 0); + class_addmethod(tcpserver_class, (t_method)tcpserver_buf_size, gensym("clientbuf"), A_GIMME, 0); + class_addmethod(tcpserver_class, (t_method)tcpserver_client_disconnect, gensym("disconnectclient"), A_DEFFLOAT, 0); + class_addmethod(tcpserver_class, (t_method)tcpserver_socket_disconnect, gensym("disconnectsocket"), A_DEFFLOAT, 0); + class_addmethod(tcpserver_class, (t_method)tcpserver_dump, gensym("dump"), A_FLOAT, 0); + class_addmethod(tcpserver_class, (t_method)tcpserver_broadcast, gensym("broadcast"), A_GIMME, 0); + class_addmethod(tcpserver_class, (t_method)tcpserver_timeout, gensym("timeout"), A_FLOAT, 0); + class_addlist(tcpserver_class, (t_method)tcpserver_send); +} + +/* end of tcpserver.c */ -- cgit v1.2.1