#include <stdlib.h>
#include <unistd.h>
#include <stdio.h>
#include <netinet/in.h>
#include <netinet/tcp.h>
#include <string.h>
#include <time.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/socket.h>
#include <sys/time.h>
#include <arpa/inet.h>
#include <netdb.h>
#include <fcntl.h>
#include <errno.h>
#include <ctype.h>
#include <pthread.h>

Include dependency graph for eagi_proxy.c:

Macros
#define	BUFSIZE 1024

#define	COMMAND_PORT 8417

#define	SEND_ENVIORNMENT /send the enviornment thru the socket/

#define	SIGNAL_PORT 8418

#define	WINBUF_NUM 2400 /* number of WINSIZE windows = 1 minute */

#define	WINSIZE 400 /* 25 ms @ 8 kHz and 16bit */

Functions
int	connect_to_host (char *host, int port)

void	finalize ()

int	main ()

void	read_full (int file, char *buffer, int num)

int	read_some (int file, char *buffer, int size)

void *	readSignal (void *ptr)

void *	readStdin (void *ptr)

void	setnonblocking (int desc)

int	write_amap (int file, char *buffer, int num)

void	write_buf (int file, char *buffer, int num)

Variables
char *	be

char *	bs

char	buf [BUFSIZE]

int	command_desc

pthread_mutex_t	command_mutex

char	connected =1

char *	end

pthread_t	signal_thread

int	speech_desc

pthread_t	stdin_thread

char *	winbuf

char	window [WINSIZE]

Macro Definition Documentation

◆ BUFSIZE

#define BUFSIZE 1024

Definition at line 65 of file eagi_proxy.c.

◆ COMMAND_PORT

#define COMMAND_PORT 8417

Definition at line 60 of file eagi_proxy.c.

◆ SEND_ENVIORNMENT

#define SEND_ENVIORNMENT /*send the enviornment thru the socket*/

Definition at line 61 of file eagi_proxy.c.

◆ SIGNAL_PORT

#define SIGNAL_PORT 8418

Definition at line 59 of file eagi_proxy.c.

◆ WINBUF_NUM

#define WINBUF_NUM 2400 /* number of WINSIZE windows = 1 minute */

Definition at line 71 of file eagi_proxy.c.

◆ WINSIZE

#define WINSIZE 400 /* 25 ms @ 8 kHz and 16bit */

Definition at line 68 of file eagi_proxy.c.

Function Documentation

◆ connect_to_host()

int connect_to_host	(	char *	host,
		int	port
	)

Definition at line 217 of file eagi_proxy.c.

{
    int address;
    struct hostent* host_entity;
    int res,desc;
    int opts;
    struct sockaddr_in host;
 
 
    /* get address */
    if(!strcmp(name,"localhost"))
        address=htonl(2130706433); /*127.0.0.1*/
    else
    {
        address=inet_addr(name); /* check if it's an IP that's written in the string */
        if(address==(in_addr_t)-1)
        {
            host_entity = gethostbyname(name); /* search for the host under this name */
 
            if(!host_entity)
            {
                fprintf(stderr,"EAGI proxy: Wrong address!\n"); /* can't find anything*/
                return -1;
            }
            address=*((int*)host_entity->h_addr);
        }
    }
 
    desc=socket(AF_INET,SOCK_STREAM,IPPROTO_TCP);
    if(desc<0)
    {
        fprintf(stderr,"EAGI proxy: Cannot create socket!\n");
        return -1;
    }
 
    memset((void*)&host,0,sizeof(struct sockaddr_in));
 
    host.sin_family=AF_INET;
    host.sin_port=htons(port);
    host.sin_addr.s_addr=address;
 
    res=connect(desc,(struct sockaddr*)&host,sizeof(host));
    if(res<0)
    {
        fprintf(stderr,"EAGI proxy: Cannot connect!\n");
        return -1;
    }
 
    /* set to non-blocking mode */
    opts = fcntl(desc,F_GETFL);
    if (opts < 0) {
        perror("fcntl(F_GETFL)");
        exit(EXIT_FAILURE);
    }
    opts = (opts | O_NONBLOCK);
    if (fcntl(desc,F_SETFL,opts) < 0) {
        perror("fcntl(F_SETFL)");
        exit(EXIT_FAILURE);
    }
 
 
    return desc;
}

References desc, EXIT_FAILURE, gethostbyname, and name.

Referenced by main().

◆ finalize()

void finalize ( )

Definition at line 154 of file eagi_proxy.c.

{
    close(command_desc);
    close(speech_desc);
    free(winbuf);
}

References command_desc, free(), speech_desc, and winbuf.

Referenced by main().

◆ main()

int main ( )

Definition at line 107 of file eagi_proxy.c.

{
    int ret;
 
    atexit(finalize);
 
    setlinebuf(stdin);
    setlinebuf(stdout);
 
    winbuf=(char*)malloc(WINSIZE*WINBUF_NUM);
    end=winbuf+WINSIZE*WINBUF_NUM;
    bs=be=winbuf;
 
    speech_desc=connect_to_host("localhost",SIGNAL_PORT);
    if(speech_desc<0)
    {
        perror("signal socket");
        return -1;
    }
 
 
    command_desc=connect_to_host("localhost",COMMAND_PORT);
    if(command_desc<0)
    {
        perror("command socket");
        return -1;
    }
 
    pthread_mutex_init(&command_mutex,NULL);
    pthread_create(&stdin_thread,NULL,readStdin,NULL);
    pthread_create(&signal_thread,NULL,readSignal,NULL);
 
    while(connected)
    {
        pthread_mutex_lock(&command_mutex);
        ret=read_some(command_desc,buf,BUFSIZE);
        pthread_mutex_unlock(&command_mutex);
        if(ret>0)
        {
            buf[ret]=0;
            printf("%s",buf);
        }
    }
 
    return 0;
}

References be, bs, buf, BUFSIZE, command_desc, command_mutex, COMMAND_PORT, connect_to_host(), connected, end, finalize(), malloc(), NULL, pthread_create, pthread_mutex_init, pthread_mutex_lock, pthread_mutex_unlock, read_some(), readSignal(), readStdin(), SIGNAL_PORT, signal_thread, speech_desc, stdin_thread, winbuf, WINBUF_NUM, and WINSIZE.

◆ read_full()

void read_full	(	int	file,
		char *	buffer,
		int	num
	)

Definition at line 200 of file eagi_proxy.c.

{
    int count,pos=0;
 
    while(num)
    {
        count=read(file,buffer+pos,num);
        if(count==0 || (count<0 && errno!=EAGAIN))
        {
            connected=0;
            return;
        }
        num-=count;
        pos+=count;
    }
}

References connected, errno, and make_ari_stubs::file.

Referenced by readSignal().

◆ read_some()

int read_some	(	int	file,
		char *	buffer,
		int	size
	)

Definition at line 281 of file eagi_proxy.c.

{
    unsigned char c;
    int res,i=0;
 
    for(;;)
    {
        res=read(desc,&c,1);
        if(res<1)
        {
            if(errno!=EAGAIN)
            {
                perror("Error reading");
                connected=0;
            }
            break;
        }
        if(res==0)
        {
            connected=0;
            break;
        }
 
        buffer[i]=c;
        i++;
    }
 
    return i;
}

References c, connected, desc, and errno.

Referenced by main().

◆ readSignal()

void * readSignal ( void * ptr )

Definition at line 188 of file eagi_proxy.c.

{
    while(connected)
    {
        read_full(3,window,WINSIZE);
        write_buf(speech_desc,window,WINSIZE);
    }
 
    pthread_exit(NULL);
}

References connected, NULL, read_full(), speech_desc, window, WINSIZE, and write_buf().

Referenced by main().

◆ readStdin()

void * readStdin ( void * ptr )

Definition at line 161 of file eagi_proxy.c.

{
    while(1)/*read enviornment*/
    {
        fgets(buf,BUFSIZE,stdin);
        #ifdef SEND_ENVIORNMENT
            pthread_mutex_lock(&command_mutex);
            write_buf(command_desc,buf,strlen(buf));
            pthread_mutex_unlock(&command_mutex);
        #endif
        if(feof(stdin) || buf[0]=='\n')
        {
            break;
        }
    }
 
    while(connected)
    {
        fgets(buf,BUFSIZE,stdin);
        pthread_mutex_lock(&command_mutex);
        write_buf(command_desc,buf,strlen(buf));
        pthread_mutex_unlock(&command_mutex);
    }
 
    pthread_exit(NULL);
}

References buf, BUFSIZE, command_desc, command_mutex, connected, NULL, pthread_mutex_lock, pthread_mutex_unlock, and write_buf().

Referenced by main().

◆ setnonblocking()

void setnonblocking ( int desc )

Definition at line 402 of file eagi_proxy.c.

{
    int opts;
 
    opts = fcntl(desc,F_GETFL);
    if(opts < 0)
    {
        perror("fcntl(F_GETFL)");
        exit(-1);
    }
 
    opts = (opts | O_NONBLOCK );
    if(fcntl(desc,F_SETFL,opts) < 0)
    {
        perror("fcntl(F_SETFL)");
        exit(-1);
    }
}

References desc.

◆ write_amap()

int write_amap	(	int	file,
		char *	buffer,
		int	num
	)

Definition at line 382 of file eagi_proxy.c.

{
    int ret;
    ret=write(desc,buf,size);
    if(ret<0)
    {
        if(errno!=EAGAIN)
        {
            perror("Error writing");
            connected=0;
        }
        return 0;
    }
    if(ret==0)
        connected=0;
 
    return ret;
}

References buf, connected, desc, and errno.

Referenced by write_buf().

◆ write_buf()

void write_buf	(	int	file,
		char *	buffer,
		int	num
	)

Definition at line 312 of file eagi_proxy.c.

{
    int ret;
 
    /*NOTE: AMAP -> as much as possible */
 
    if(be!=bs)/* if data left in buffer */
    {
        if(be>bs)/* if buffer not split */
        {
            ret=write_amap(desc,bs,be-bs);/* write AMAP */
            bs+=ret;/* shift the start of the buffer */
        }
        else/* if buffer is split */
        {
            ret=write_amap(desc,bs,end-bs);/* write higher part first */
            if(ret==end-bs)/* if wrote whole of the higher part */
            {
                ret=write_amap(desc,winbuf,be-winbuf);/* write lower part */
                bs=winbuf+ret;/* shift start to new position */
            }
            else bs+=ret;/* if not wrote whole of higher part, only shift start */
        }
    }
 
    if(be==bs)/* if buffer is empty now */
    {
        ret=write_amap(desc,buf,size);/* write AMAP of the new data */
        buf+=ret;/* shift start of new data */
        size-=ret;/* lower size of new data */
    }
 
    if(size)/* if new data still remains unsent */
    {
        if(be>=bs)/* if data not split */
        {
            if(size>end-be)/* if new data size doesn't fit higher end */
            {
                size-=end-be;/* reduce new data size by the higher end size */
                memcpy(be,buf,end-be);/* copy to higher end */
                be=winbuf;/* shift end to begining of buffer */
                buf+=end-be;/* shift start of new data */
            }
            else/* if new data fits the higher end */
            {
                memcpy(be,buf,size);/* copy to higher end */
                be+=size;/* shift end by size */
                if(be>=end)/* if end goes beyond the buffer */
                    be=winbuf;/* restart */
                size=0;/* everything copied */
            }
        }
 
        if(size)/* if new data still remains */
        {
            if(size>=bs-be)/* if new data doesn't fit between end and start */
            {
                fprintf(stderr,"Buffer overflow!\n");
                size=bs-be-1;/* reduce the size that we can copy */
            }
 
            if(size)/* if we can copy anything */
            {
                memcpy(be,buf,size);/* copy the new data between end and start */
                be+=size;/* shift end by size */
            }
        }
    }
}