static void usage()
{ int i,width=0;
PRINT("Usage: %s [options]",basename(ARGV[0]));
for(i=0;i<countof(ARGS);++i)
PRINT(" <%s>",ARGS[i].name);
for(i=0;i<countof(ARGS);++i)
{ int c=0;
#define WRITE(...) c+=snprintf(ARGS[i].state.buf+c,sizeof(ARGS[i].state.buf)-c,__VA_ARGS__)
WRITE(" %s",ARGS[i].name);
#undef WRITE
}
// left column of help text
for(i=0;i<countof(SPEC);++i)
{ int c=0;
#define WRITE(...) c+=snprintf(SPEC[i].state.buf+c,sizeof(SPEC[i].state.buf)-c,__VA_ARGS__)
WRITE(" %s",SPEC[i].shortname);
if(SPEC[i].longname)
WRITE(" [%s]",SPEC[i].longname);
if(!SPEC[i].is_flag)
{ WRITE(" arg");
if(SPEC[i].def)
WRITE(" (=%s)",SPEC[i].def);
}
#undef WRITE
}
// width of left column
for(i=0;i<countof(ARGS);++i)
{ int n=(int)strlen(ARGS[i].state.buf);
width=(n>width)?n:width;
}
for(i=0;i<countof(SPEC);++i)
{ int n=(int)strlen(SPEC[i].state.buf);
width=(n>width)?n:width;
}
PRINT("\nArguments:\n");
for(i=0;i<countof(ARGS);++i)
writehelp(MAXWIDTH,ARGS[i].state.buf,width,ARGS[i].help);
PRINT("\nOptions:\n");
for(i=0;i<countof(SPEC);++i)
writehelp(MAXWIDTH,SPEC[i].state.buf,width,SPEC[i].help);
printf("\n");
}
takeclient(struct sockaddr_in destination, int SDfromClient)
{
int newSD;
char messageFromClient[255]; char messageToClient[255];//aka pid #
if ( (newSD=accept(SDfromClient, NULL, NULL)) < 0 )
{
printf ("accept failed\n");
return 0;
}
else {
printf("Accepting connections...\n");
}
while(1)
{
strcpy(&messageFromClient,(char *)readhelp(newSD,&messageFromClient,255));
printf("Message from client: %s\n", messageFromClient);
// strcpy(&messageToClient, &messageFromClient);
// printf("messageToClient is: %s and length %d \n", messageToClient, strlen(messageToClient)+1);
fgets(messageToClient,255,stdin);
writehelp(newSD, messageToClient, strlen(messageToClient)+1);
}
close(newSD);
}
int main(int argc, char **argv)
{
//deal with commandline arguments
char incmd[200];
//analyze commandline args
if( (argc<2) || strcmp(argv[1],"-help")==0 || strcmp(argv[1],"--help")==0 ) {
printf("argc=%d\n", argc);
writehelp();
exit(0);
}
int i;
strcpy(incmd, argv[1]);
if( strcmp(argv[1], "stop")==0) strcpy(incmd, "-Q");
for(i=2; i<argc; i++) {
strcat(incmd," ");
strcat(incmd,argv[i]);
}
if(argc > 1 && strcmp(argv[1], "start")==0) system("mptcp_proxy &");
//make down FIFO
mkfifo(FIFO_NAME_DOWN, (mode_t) 0666);
//open fifo
int fd_down = open(FIFO_NAME_DOWN, O_WRONLY | O_NONBLOCK);
//send data
int ret = write(fd_down, incmd, strlen(incmd));
if(ret < -1){
printf("mpproxy: writing to pipe failed\n");
exit(0);
}
close(fd_down);
//make up FIFO
mkfifo(FIFO_NAME_UP, (mode_t) 0666);
//open fifo
int fd_up = open(FIFO_NAME_UP, O_RDONLY | O_NONBLOCK);
fd_set fds_test;
fd_set fds_input;
FD_ZERO(&fds_input);
FD_SET(fd_up, &fds_input);
fds_test = fds_input;
struct timeval timeout;
timeout.tv_sec = 1;
timeout.tv_usec = 0;
char buf[LEN_FIFO_MSG+1];
int fd;
int rtn = select(FD_SETSIZE, &fds_test, (fd_set *) NULL, (fd_set *) NULL, &timeout);
if(rtn == -1) {
printf("mpproxy: select returns=%d, exit program!\n",rtn);
exit(1);
}
for(fd = 0; fd < FD_SETSIZE; fd++){
if(FD_ISSET(fd, &fds_test)){
if (fd == fd_up){
ret = read(fd_up, buf, LEN_FIFO_MSG);
buf[ret] = '\0';
if(ret < -1){
printf("mpproxy: reading from pipe failed\n");
close(fd_up);
exit(0);
}
close(fd_up);
if(buf[0] != '\0') printf("%s\n", buf);
}
}//end if F
}
}