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[/] [or1k/] [tags/] [stable_0_2_0_rc1/] [or1ksim/] [vapi/] [vapi.c] - Blame information for rev 336

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/* vapi.c -- Verification API Interface
   Copyright (C) 2001, Marko Mlinar, markom@opencores.org
 
This file is part of OpenRISC 1000 Architectural Simulator.
 
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., 675 Mass Ave, Cambridge, MA 02139, USA. */
 
#include "config.h"
 
#include <stdio.h>
#include <ctype.h>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
#include <stdarg.h>
#include <signal.h>
#include <errno.h>
 
/* Added by CZ 24/05/01 */
#include <sys/stat.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <sys/select.h>
#include <sys/poll.h>
#include <fcntl.h>
#include <netdb.h>
#include <netinet/tcp.h>
#include <inttypes.h>
 
#include "sim-config.h"
 
static unsigned int serverIP = 0;
 
static unsigned int server_fd = 0;
static unsigned int nhandlers = 0;
 
void server_request(void);
 
static int tcp_level = 0;
 
static struct vapi_handler {
  int fd;
  unsigned long id;
  void (*read_func)(unsigned long, unsigned long);
  struct vapi_handler *next;
  int temp;
} *vapi_handler;
 
/* Structure for polling, it is cached, that it doesn't have to be rebuilt each time */
static struct pollfd *fds = NULL;
static int nfds = 0;
 
/* Rebuilds the fds structures; see fds.  */
void rebuild_fds () {
  struct vapi_handler *t;
  if (fds)
    free (fds);
  fds = (struct pollfd *) malloc (sizeof (struct pollfd) * (nhandlers + 1));
  if (!fds) {
    fprintf (stderr, "FATAL: Out of memory.\n");
    exit (1);
  }
 
  nfds = 0;
  fds[nfds].fd = server_fd;
  fds[nfds].events = POLLIN;
  fds[nfds++].revents = 0;
 
  for (t = vapi_handler; t; t = t->next) {
    if (t->fd) {
      t->temp = nfds;
      fds[nfds].fd = t->fd;
      fds[nfds].events = POLLIN;
      fds[nfds++].revents = 0;
    } else
      t->temp = -1;
  }
}
 
/* Finds a handler with given ID, return it, NULL if not found.  */
static struct vapi_handler *find_handler (unsigned long id) {
  struct vapi_handler *t = vapi_handler;
  while (t && t->id != id)
    t = t->next;
  return t;
}
 
/* Adds a handler with given id and returns it.  */
static struct vapi_handler *add_handler (unsigned long id) {
  struct vapi_handler **t = &vapi_handler;
  struct vapi_handler *tt;
  while ((*t))
    t = &(*t)->next;
  tt = (struct vapi_handler *)malloc (sizeof (struct vapi_handler));
  tt->next = NULL;
  tt->id = id;
  tt->read_func = NULL;
  tt->fd = 0;
  (*t) = tt;
  free (fds);
  fds = NULL;
  nhandlers++;
  rebuild_fds ();
  return tt;
}
 
static int vapi_write_stream(int fd, void* buf, int len)
{
  int n;
  char* w_buf = (char*)buf;
  struct pollfd block;
 
  while(len) {
    if((n = write(fd, w_buf, len)) < 0) {
      switch(errno) {
      case EWOULDBLOCK: /* or EAGAIN */
        /* We've been called on a descriptor marked
           for nonblocking I/O. We better simulate
           blocking behavior. */
        block.fd = fd;
        block.events = POLLOUT;
        block.revents = 0;
        poll(&block,1,-1);
        continue;
      case EINTR:
        continue;
      case EPIPE:
        close(fd);
        fd = 0;
        return -1;
      default:
        return -1;
      }
    } else {
      len -= n;
      w_buf += n;
    }
  }
  return 0;
}
 
static int vapi_read_stream(int fd, void* buf, int len)
{
  int n;
  char* r_buf = (char*)buf;
  struct pollfd block;
 
  while(len) {
    if((n = read(fd,r_buf,len)) < 0) {
      switch(errno) {
      case EWOULDBLOCK: /* or EAGAIN */
        /* We've been called on a descriptor marked
           for nonblocking I/O. We better simulate
           blocking behavior. */
        block.fd = fd;
        block.events = POLLIN;
        block.revents = 0;
        poll(&block,1,-1);
        continue;
      case EINTR:
        continue;
      default:
        return -1;
      }
    } else if(n == 0) {
      close(fd);
      fd = 0;
      return -1;
    } else {
      len -= n;
      r_buf += n;
    }
  }
  return 0;
}
 
/* Added by CZ 24/05/01 */
int get_server_socket(const char* name,const char* proto,int port)
{
  struct servent *service;
  struct protoent *protocol;
  struct sockaddr_in sa;
  struct hostent *hp;
  int sockfd;
  char myname[256];
  int flags;
  char sTemp[256];
 
  /* First, get the protocol number of TCP */
  if(!(protocol = getprotobyname(proto))) {
    sprintf(sTemp,"Unable to load protocol \"%s\"",proto);
    perror(sTemp);
    return 0;
  }
  tcp_level = protocol->p_proto; /* Save for later */
 
  /* If we weren't passed a non standard port, get the port
     from the services directory. */
  if(!port) {
    if(service = getservbyname(name,protocol->p_name))
      port = ntohs(service->s_port);
  }
 
  /* Create the socket using the TCP protocol */
  if((sockfd = socket(PF_INET,SOCK_STREAM,protocol->p_proto)) < 0) {
    perror("Unable to create socket");
    return 0;
  }
 
  flags = 1;
  if(setsockopt(sockfd,SOL_SOCKET,SO_REUSEADDR,(const char*)&flags,sizeof(int)) < 0) {
    sprintf(sTemp,"Can not set SO_REUSEADDR option on socket %d",sockfd);
    perror(sTemp);
    close(sockfd);
    return 0;
  }
 
  /* The server should also be non blocking. Get the current flags. */
  if(fcntl(sockfd,F_GETFL,&flags) < 0) {
    sprintf(sTemp,"Unable to get flags for socket %d",sockfd);
    perror(sTemp);
    close(sockfd);
    return 0;
  }
 
  /* Set the nonblocking flag */
  if(fcntl(sockfd,F_SETFL, flags | O_NONBLOCK) < 0) {
    sprintf(sTemp,"Unable to set flags for socket %d to value 0x%08x",
            sockfd,flags | O_NONBLOCK);
    perror(sTemp);
    close(sockfd);
    return 0;
  }
 
  /* Find out what our address is */
  memset(&sa,0,sizeof(struct sockaddr_in));
  gethostname(myname,sizeof(myname));
  if(!(hp = gethostbyname(myname))) {
    perror("Unable to read hostname");
    close(sockfd);
    return 0;
  }
 
  /* Bind our socket to the appropriate address */
  sa.sin_family = hp->h_addrtype;
  sa.sin_port = htons(port);
  if(bind(sockfd,(struct sockaddr*)&sa,sizeof(struct sockaddr_in)) < 0) {
    sprintf(sTemp,"Unable to bind socket %d to port %d",sockfd,port);
    perror(sTemp);
    close(sockfd);
    return 0;
  }
  serverIP = sa.sin_addr.s_addr;
  flags = sizeof(struct sockaddr_in);
  if(getsockname(sockfd,(struct sockaddr*)&sa,&flags) < 0) {
    sprintf(sTemp,"Unable to get socket information for socket %d",sockfd);
    perror(sTemp);
    close(sockfd);
    return 0;
  }
  config.vapi.server_port = ntohs(sa.sin_port);
 
  /* Set the backlog to 1 connections */
  if(listen(sockfd,1) < 0) {
    sprintf(sTemp,"Unable to set backlog on socket %d to %d",sockfd,1);
    perror(sTemp);
    close(sockfd);
    return 0;
  }
 
  return sockfd;
}
 
void server_request()
{
  struct sockaddr_in sa;
  struct sockaddr* addr = (struct sockaddr*)&sa;
  int n = sizeof(struct sockaddr_in);
  int fd = accept(server_fd, addr, &n);
  int on_off = 0; /* Turn off Nagel's algorithm on the socket */
  int flags;
  char sTemp[256];
 
  if(fd < 0) {
    /* This is valid, because a connection could have started,
       and then terminated due to a protocol error or user
       initiation before the accept could take place. */
    if(errno != EWOULDBLOCK && errno != EAGAIN) {
      perror("accept");
      close(server_fd);
      server_fd = 0;
      config.vapi.enabled = 0;
      serverIP = 0;
    }
    return;
  }
 
  if(fcntl(fd,F_GETFL,&flags) < 0) {
    sprintf(sTemp,"Unable to get flags for vapi socket %d",fd);
    perror(sTemp);
    close(fd);
    return;
  }
 
  if(fcntl(fd,F_SETFL, flags | O_NONBLOCK) < 0) {
    sprintf(sTemp,"Unable to set flags for vapi socket %d to value 0x%08x",
            fd,flags | O_NONBLOCK);
    perror(sTemp);
    close(fd);
    return;
  }
 
  if(setsockopt(fd,tcp_level,TCP_NODELAY,&on_off,sizeof(int)) < 0) {
    sprintf(sTemp,"Unable to disable Nagel's algorithm for socket %d.\nsetsockopt",fd);
    perror(sTemp);
    close(fd);
    return;
  }
 
  /* Install new handler */
  {
    unsigned long id;
    struct vapi_handler *t;
    if (vapi_read_stream (fd, &id, sizeof (id))) {
      perror ("Cannot get id");
      close (fd);
      return;
    }
    t = find_handler (id);
    if (t)
      if (t->fd) {
        fprintf (stderr, "WARNING: Test with id %x already connected. Ignoring.\n", id);
        close (fd);
        return;
      } else t->fd = fd;
    else {
      t = add_handler (id);
      t->fd = fd;
      rebuild_fds ();
    }
    if(config.sim.verbose)
      printf ("\nConnection with test (id %x) established.\n", id);
  }
}
 
static int write_packet (unsigned long id, unsigned long data) {
  struct vapi_handler *t = find_handler (id);
  if (!t || !t->fd)
    return 1;
  id = htonl (id);
  if (vapi_write_stream(t->fd, &id, sizeof (id)) < 0)
    return 1;
  data = htonl (data);
  if (vapi_write_stream(t->fd, &data, sizeof (data)) < 0)
    return 1;
  return 0;
}
 
static int read_packet (unsigned long id, unsigned long *data) {
  unsigned long t_id;
  struct vapi_handler *t = find_handler (id);
  if (!t || !t->fd)
    return 1;
  if (vapi_read_stream(t->fd, &t_id, sizeof (unsigned long)) < 0)
    return 1;
  t_id = htonl (t_id);
  if (t_id != id) {
    fprintf (stderr, "IDs not the same (got %x, expected %x)\n", t_id, id);
    return 1;
  }
  if (vapi_read_stream(t->fd, data, sizeof (unsigned long)) < 0)
    return 1;
  *data = htonl (*data);
  return 0;
}
 
static void vapi_request (struct vapi_handler *t) {
  unsigned long data;
  if(read_packet (t->id, &data)) {
    if(t->fd) {
      perror("vapi read");
      close(t->fd);
      t->fd = 0;
    }
    return;
  }
 
  debug ("[%08x, %08x]\n", t->id, data);
  if (!t->read_func)
    fprintf (stderr, "WARNING: packet sent to undefined id %x, %x\n", t->id, data);
  else
    t->read_func(t->id, data);
}
 
void vapi_check ()
{
  struct vapi_handler *t;
 
  if (!server_fd || !fds) {
    fprintf (stderr, "FATAL: Unable to maintain VAPI server.\n");
    exit (1);
  }
 
  /* Handle everything in queue. */
  while(1) {
    switch(poll(fds, nfds, 0)) {
    case -1:
      if(errno == EINTR)
        continue;
      perror("poll");
      if (server_fd)
        close(server_fd);
      config.vapi.enabled = 0;
      serverIP = 0;
      return;
    case 0: /* Nothing interesting going on */
      return;
    default:
      /* Handle the vapi ports first. */
      for (t = vapi_handler; t; t = t->next)
        if (t->temp >= 0 && fds[t->temp].revents)
          vapi_request (t);
 
      if(fds[0].revents) {
        if(fds[0].revents & POLLIN)
          server_request();
        else { /* Error Occurred */
          fprintf(stderr,"Received flags 0x%08x on server. Shutting down.\n", fds[0].revents);
          if (server_fd)
            close(server_fd);
          server_fd = 0;
          config.vapi.enabled = 0;
          serverIP = 0;
        }
      }
      break;
    } /* End of switch statement */
  } /* End of while statement */
}
 
/* Inits the VAPI, according to sim-config */
int vapi_init ()
{
  nhandlers = 0;
  vapi_handler = NULL;
  if (!config.vapi.enabled)
    return 0; /* Nothing to do */
 
  if (!config.vapi.server_port) {
    fprintf (stderr, "WARNING: server_port = 0, shutting down VAPI\n");
    config.vapi.enabled = 0;
    return 1;
  }
  if (server_fd = get_server_socket("or1ksim", "tcp", config.vapi.server_port))
    printf("VAPI Server started on port %d\n", config.vapi.server_port);
  else {
    perror ("Connection");
    return 1;
  }
 
  rebuild_fds ();
  return 0;
}
 
/* Closes the VAPI */
void vapi_done ()
{
  int i;
  struct vapi_handler *t = vapi_handler;
 
  for (i = 0; i < nfds; i++)
    if (fds[i].fd)
      close (fds[i].fd);
  server_fd = 0;
  config.vapi.enabled = 0;
  serverIP = 0;
  free (fds);
  fds = 0;
  while (vapi_handler) {
    t = vapi_handler;
    vapi_handler = vapi_handler->next;
    free (t);
  }
}
 
/* Installs a vapi handler to VAPI id */
void vapi_install_handler (unsigned long id, void (*read_func) (unsigned long, unsigned long))
{
  struct vapi_handler *tt;
  if (read_func == NULL) {
    struct vapi_handler **t = &vapi_handler;
    while ((*t) && (*t)->id != id)
      t = &(*t)->next;
    if (!t) {
      fprintf (stderr, "Cannot uninstall VAPI read handler from id %x\n", id);
      exit (1);
    }
    tt = *t;
    (*t) = (*t)->next;
    free (tt);
    nhandlers--;
  } else {
    tt = add_handler (id);
    tt->read_func = read_func;
  }
}
 
/* Returns number of unconnected handles.  */
int vapi_num_unconnected (int printout)
{
  struct vapi_handler *t = vapi_handler;
  int numu = 0;
  for (; t; t = t->next) {
    if (!t->fd) {
      numu++;
      if (printout) printf (" %x", t->id);
    }
  }
  return numu;
}
 
/* Sends a packet to specified test */
int vapi_send (unsigned long id, unsigned long data)
{
  write_packet (id, data);
}
 
 
/*
int main ()
{
  config.vapi.enabled = 1;
  config.vapi.server_port = 9999;
  vapi_init ();
  while (1) {
    vapi_check();
    usleep(1);
  }
  vapi_done ();
}*/

Line No.	Rev	Author	Line
1	293	markom	`/* vapi.c -- Verification API Interface`
2			`Copyright (C) 2001, Marko Mlinar, markom@opencores.org`
3
4			`This file is part of OpenRISC 1000 Architectural Simulator.`
5
6			`This program is free software; you can redistribute it and/or modify`
7			`it under the terms of the GNU General Public License as published by`
8			`the Free Software Foundation; either version 2 of the License, or`
9			`(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`
14			`GNU General Public License for more details.`
15
16			`You should have received a copy of the GNU General Public License`
17			`along with this program; if not, write to the Free Software`
18			`Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */`
19
20	336	markom	`#include "config.h"`
21	293	markom
22			`#include <stdio.h>`
23			`#include <ctype.h>`
24			`#include <string.h>`
25			`#include <stdlib.h>`
26			`#include <unistd.h>`
27			`#include <stdarg.h>`
28			`#include <signal.h>`
29			`#include <errno.h>`
30
31			`/* Added by CZ 24/05/01 */`
32			`#include <sys/stat.h>`
33			`#include <sys/types.h>`
34			`#include <sys/socket.h>`
35			`#include <netinet/in.h>`
36			`#include <sys/select.h>`
37			`#include <sys/poll.h>`
38			`#include <fcntl.h>`
39			`#include <netdb.h>`
40			`#include <netinet/tcp.h>`
41			`#include <inttypes.h>`
42
43	336	markom	`#include "sim-config.h"`
44	293	markom
45	304	markom	`static unsigned int serverIP = 0;`
46	293	markom
47	304	markom	`static unsigned int server_fd = 0;`
48			`static unsigned int nhandlers = 0;`
49
50	293	markom	`void server_request(void);`
51
52			`static int tcp_level = 0;`
53
54	304	markom	`static struct vapi_handler {`
55			`int fd;`
56	293	markom	`unsigned long id;`
57	336	markom	`void (*read_func)(unsigned long, unsigned long);`
58	293	markom	`struct vapi_handler *next;`
59	304	markom	`int temp;`
60	293	markom	`} *vapi_handler;`
61
62	304	markom	`/* Structure for polling, it is cached, that it doesn't have to be rebuilt each time */`
63			`static struct pollfd *fds = NULL;`
64			`static int nfds = 0;`
65
66			`/* Rebuilds the fds structures; see fds. */`
67			`void rebuild_fds () {`
68			`struct vapi_handler *t;`
69			`if (fds)`
70			`free (fds);`
71			`fds = (struct pollfd ) malloc (sizeof (struct pollfd) (nhandlers + 1));`
72			`if (!fds) {`
73			`fprintf (stderr, "FATAL: Out of memory.\n");`
74			`exit (1);`
75			`}`
76
77			`nfds = 0;`
78			`fds[nfds].fd = server_fd;`
79			`fds[nfds].events = POLLIN;`
80			`fds[nfds++].revents = 0;`
81
82			`for (t = vapi_handler; t; t = t->next) {`
83			`if (t->fd) {`
84			`t->temp = nfds;`
85			`fds[nfds].fd = t->fd;`
86			`fds[nfds].events = POLLIN;`
87			`fds[nfds++].revents = 0;`
88			`} else`
89			`t->temp = -1;`
90			`}`
91			`}`
92
93			`/* Finds a handler with given ID, return it, NULL if not found. */`
94			`static struct vapi_handler *find_handler (unsigned long id) {`
95			`struct vapi_handler *t = vapi_handler;`
96			`while (t && t->id != id)`
97			`t = t->next;`
98			`return t;`
99			`}`
100
101			`/* Adds a handler with given id and returns it. */`
102			`static struct vapi_handler *add_handler (unsigned long id) {`
103			`struct vapi_handler **t = &vapi_handler;`
104			`struct vapi_handler *tt;`
105			`while ((*t))`
106			`t = &(*t)->next;`
107			`tt = (struct vapi_handler *)malloc (sizeof (struct vapi_handler));`
108			`tt->next = NULL;`
109			`tt->id = id;`
110			`tt->read_func = NULL;`
111			`tt->fd = 0;`
112			`(*t) = tt;`
113			`free (fds);`
114			`fds = NULL;`
115			`nhandlers++;`
116			`rebuild_fds ();`
117			`return tt;`
118			`}`
119
120			`static int vapi_write_stream(int fd, void* buf, int len)`
121			`{`
122			`int n;`
123			`char* w_buf = (char*)buf;`
124			`struct pollfd block;`
125
126			`while(len) {`
127			`if((n = write(fd, w_buf, len)) < 0) {`
128			`switch(errno) {`
129			`case EWOULDBLOCK: /* or EAGAIN */`
130			`/* We've been called on a descriptor marked`
131			`for nonblocking I/O. We better simulate`
132			`blocking behavior. */`
133			`block.fd = fd;`
134			`block.events = POLLOUT;`
135			`block.revents = 0;`
136			`poll(&block,1,-1);`
137			`continue;`
138			`case EINTR:`
139			`continue;`
140			`case EPIPE:`
141			`close(fd);`
142			`fd = 0;`
143			`return -1;`
144			`default:`
145			`return -1;`
146			`}`
147			`} else {`
148			`len -= n;`
149			`w_buf += n;`
150			`}`
151			`}`
152			`return 0;`
153			`}`
154
155			`static int vapi_read_stream(int fd, void* buf, int len)`
156			`{`
157			`int n;`
158			`char* r_buf = (char*)buf;`
159			`struct pollfd block;`
160
161			`while(len) {`
162			`if((n = read(fd,r_buf,len)) < 0) {`
163			`switch(errno) {`
164			`case EWOULDBLOCK: /* or EAGAIN */`
165			`/* We've been called on a descriptor marked`
166			`for nonblocking I/O. We better simulate`
167			`blocking behavior. */`
168			`block.fd = fd;`
169			`block.events = POLLIN;`
170			`block.revents = 0;`
171			`poll(&block,1,-1);`
172			`continue;`
173			`case EINTR:`
174			`continue;`
175			`default:`
176			`return -1;`
177			`}`
178			`} else if(n == 0) {`
179			`close(fd);`
180			`fd = 0;`
181			`return -1;`
182			`} else {`
183			`len -= n;`
184			`r_buf += n;`
185			`}`
186			`}`
187			`return 0;`
188			`}`
189
190	293	markom	`/* Added by CZ 24/05/01 */`
191			`int get_server_socket(const char* name,const char* proto,int port)`
192			`{`
193			`struct servent *service;`
194			`struct protoent *protocol;`
195			`struct sockaddr_in sa;`
196			`struct hostent *hp;`
197			`int sockfd;`
198			`char myname[256];`
199			`int flags;`
200			`char sTemp[256];`
201
202			`/* First, get the protocol number of TCP */`
203			`if(!(protocol = getprotobyname(proto))) {`
204			`sprintf(sTemp,"Unable to load protocol \"%s\"",proto);`
205			`perror(sTemp);`
206			`return 0;`
207			`}`
208			`tcp_level = protocol->p_proto; /* Save for later */`
209
210			`/* If we weren't passed a non standard port, get the port`
211			`from the services directory. */`
212			`if(!port) {`
213			`if(service = getservbyname(name,protocol->p_name))`
214			`port = ntohs(service->s_port);`
215			`}`
216	336	markom
217	293	markom	`/* Create the socket using the TCP protocol */`
218			`if((sockfd = socket(PF_INET,SOCK_STREAM,protocol->p_proto)) < 0) {`
219			`perror("Unable to create socket");`
220			`return 0;`
221			`}`
222	336	markom
223	293	markom	`flags = 1;`
224			`if(setsockopt(sockfd,SOL_SOCKET,SO_REUSEADDR,(const char*)&flags,sizeof(int)) < 0) {`
225			`sprintf(sTemp,"Can not set SO_REUSEADDR option on socket %d",sockfd);`
226			`perror(sTemp);`
227			`close(sockfd);`
228			`return 0;`
229			`}`
230
231			`/* The server should also be non blocking. Get the current flags. */`
232			`if(fcntl(sockfd,F_GETFL,&flags) < 0) {`
233			`sprintf(sTemp,"Unable to get flags for socket %d",sockfd);`
234			`perror(sTemp);`
235			`close(sockfd);`
236			`return 0;`
237			`}`
238
239			`/* Set the nonblocking flag */`
240			`if(fcntl(sockfd,F_SETFL, flags \| O_NONBLOCK) < 0) {`
241			`sprintf(sTemp,"Unable to set flags for socket %d to value 0x%08x",`
242			`sockfd,flags \| O_NONBLOCK);`
243			`perror(sTemp);`
244			`close(sockfd);`
245			`return 0;`
246			`}`
247
248			`/* Find out what our address is */`
249			`memset(&sa,0,sizeof(struct sockaddr_in));`
250			`gethostname(myname,sizeof(myname));`
251			`if(!(hp = gethostbyname(myname))) {`
252			`perror("Unable to read hostname");`
253			`close(sockfd);`
254			`return 0;`
255			`}`
256
257			`/* Bind our socket to the appropriate address */`
258			`sa.sin_family = hp->h_addrtype;`
259			`sa.sin_port = htons(port);`
260			`if(bind(sockfd,(struct sockaddr*)&sa,sizeof(struct sockaddr_in)) < 0) {`
261			`sprintf(sTemp,"Unable to bind socket %d to port %d",sockfd,port);`
262			`perror(sTemp);`
263			`close(sockfd);`
264			`return 0;`
265			`}`
266			`serverIP = sa.sin_addr.s_addr;`
267			`flags = sizeof(struct sockaddr_in);`
268			`if(getsockname(sockfd,(struct sockaddr*)&sa,&flags) < 0) {`
269			`sprintf(sTemp,"Unable to get socket information for socket %d",sockfd);`
270			`perror(sTemp);`
271			`close(sockfd);`
272			`return 0;`
273			`}`
274			`config.vapi.server_port = ntohs(sa.sin_port);`
275
276			`/* Set the backlog to 1 connections */`
277			`if(listen(sockfd,1) < 0) {`
278			`sprintf(sTemp,"Unable to set backlog on socket %d to %d",sockfd,1);`
279			`perror(sTemp);`
280			`close(sockfd);`
281			`return 0;`
282			`}`
283
284			`return sockfd;`
285			`}`
286
287			`void server_request()`
288			`{`
289			`struct sockaddr_in sa;`
290			`struct sockaddr* addr = (struct sockaddr*)&sa;`
291			`int n = sizeof(struct sockaddr_in);`
292	336	markom	`int fd = accept(server_fd, addr, &n);`
293	293	markom	`int on_off = 0; /* Turn off Nagel's algorithm on the socket */`
294			`int flags;`
295			`char sTemp[256];`
296
297			`if(fd < 0) {`
298			`/* This is valid, because a connection could have started,`
299			`and then terminated due to a protocol error or user`
300			`initiation before the accept could take place. */`
301			`if(errno != EWOULDBLOCK && errno != EAGAIN) {`
302			`perror("accept");`
303			`close(server_fd);`
304			`server_fd = 0;`
305	304	markom	`config.vapi.enabled = 0;`
306	293	markom	`serverIP = 0;`
307	336	markom	`}`
308	293	markom	`return;`
309			`}`
310
311			`if(fcntl(fd,F_GETFL,&flags) < 0) {`
312			`sprintf(sTemp,"Unable to get flags for vapi socket %d",fd);`
313			`perror(sTemp);`
314			`close(fd);`
315			`return;`
316			`}`
317
318			`if(fcntl(fd,F_SETFL, flags \| O_NONBLOCK) < 0) {`
319			`sprintf(sTemp,"Unable to set flags for vapi socket %d to value 0x%08x",`
320			`fd,flags \| O_NONBLOCK);`
321			`perror(sTemp);`
322			`close(fd);`
323			`return;`
324			`}`
325
326			`if(setsockopt(fd,tcp_level,TCP_NODELAY,&on_off,sizeof(int)) < 0) {`
327			`sprintf(sTemp,"Unable to disable Nagel's algorithm for socket %d.\nsetsockopt",fd);`
328			`perror(sTemp);`
329			`close(fd);`
330			`return;`
331			`}`
332	304	markom
333			`/* Install new handler */`
334			`{`
335			`unsigned long id;`
336			`struct vapi_handler *t;`
337			`if (vapi_read_stream (fd, &id, sizeof (id))) {`
338			`perror ("Cannot get id");`
339			`close (fd);`
340			`return;`
341	293	markom	`}`
342	304	markom	`t = find_handler (id);`
343			`if (t)`
344			`if (t->fd) {`
345			`fprintf (stderr, "WARNING: Test with id %x already connected. Ignoring.\n", id);`
346			`close (fd);`
347			`return;`
348			`} else t->fd = fd;`
349			`else {`
350			`t = add_handler (id);`
351			`t->fd = fd;`
352			`rebuild_fds ();`
353	293	markom	`}`
354	304	markom	`if(config.sim.verbose)`
355	336	markom	`printf ("\nConnection with test (id %x) established.\n", id);`
356	293	markom	`}`
357			`}`
358
359			`static int write_packet (unsigned long id, unsigned long data) {`
360	304	markom	`struct vapi_handler *t = find_handler (id);`
361			`if (!t \|\| !t->fd)`
362			`return 1;`
363	293	markom	`id = htonl (id);`
364	304	markom	`if (vapi_write_stream(t->fd, &id, sizeof (id)) < 0)`
365	293	markom	`return 1;`
366			`data = htonl (data);`
367	304	markom	`if (vapi_write_stream(t->fd, &data, sizeof (data)) < 0)`
368	293	markom	`return 1;`
369			`return 0;`
370			`}`
371
372	304	markom	`static int read_packet (unsigned long id, unsigned long *data) {`
373			`unsigned long t_id;`
374			`struct vapi_handler *t = find_handler (id);`
375			`if (!t \|\| !t->fd)`
376	293	markom	`return 1;`
377	304	markom	`if (vapi_read_stream(t->fd, &t_id, sizeof (unsigned long)) < 0)`
378	293	markom	`return 1;`
379	304	markom	`t_id = htonl (t_id);`
380			`if (t_id != id) {`
381			`fprintf (stderr, "IDs not the same (got %x, expected %x)\n", t_id, id);`
382			`return 1;`
383			`}`
384			`if (vapi_read_stream(t->fd, data, sizeof (unsigned long)) < 0)`
385			`return 1;`
386	293	markom	`data = htonl (data);`
387			`return 0;`
388	304	markom	`}`
389	293	markom
390	304	markom	`static void vapi_request (struct vapi_handler *t) {`
391			`unsigned long data;`
392			`if(read_packet (t->id, &data)) {`
393			`if(t->fd) {`
394	293	markom	`perror("vapi read");`
395	304	markom	`close(t->fd);`
396			`t->fd = 0;`
397	293	markom	`}`
398			`return;`
399			`}`
400
401	304	markom	`debug ("[%08x, %08x]\n", t->id, data);`
402			`if (!t->read_func)`
403			`fprintf (stderr, "WARNING: packet sent to undefined id %x, %x\n", t->id, data);`
404	293	markom	`else`
405	336	markom	`t->read_func(t->id, data);`
406	293	markom	`}`
407
408			`void vapi_check ()`
409			`{`
410	304	markom	`struct vapi_handler *t;`
411	293	markom
412	304	markom	`if (!server_fd \|\| !fds) {`
413			`fprintf (stderr, "FATAL: Unable to maintain VAPI server.\n");`
414			`exit (1);`
415	293	markom	`}`
416
417	304	markom	`/* Handle everything in queue. */`
418	293	markom	`while(1) {`
419	304	markom	`switch(poll(fds, nfds, 0)) {`
420	293	markom	`case -1:`
421			`if(errno == EINTR)`
422			`continue;`
423			`perror("poll");`
424	304	markom	`if (server_fd)`
425			`close(server_fd);`
426			`config.vapi.enabled = 0;`
427			`serverIP = 0;`
428			`return;`
429	293	markom	`case 0: /* Nothing interesting going on */`
430			`return;`
431			`default:`
432	304	markom	`/* Handle the vapi ports first. */`
433			`for (t = vapi_handler; t; t = t->next)`
434			`if (t->temp >= 0 && fds[t->temp].revents)`
435			`vapi_request (t);`
436	293	markom
437	304	markom	`if(fds[0].revents) {`
438	293	markom	`if(fds[0].revents & POLLIN)`
439			`server_request();`
440			`else { /* Error Occurred */`
441	304	markom	`fprintf(stderr,"Received flags 0x%08x on server. Shutting down.\n", fds[0].revents);`
442			`if (server_fd)`
443			`close(server_fd);`
444	293	markom	`server_fd = 0;`
445	304	markom	`config.vapi.enabled = 0;`
446	293	markom	`serverIP = 0;`
447			`}`
448			`}`
449			`break;`
450			`} /* End of switch statement */`
451			`} /* End of while statement */`
452			`}`
453
454	304	markom	`/* Inits the VAPI, according to sim-config */`
455			`int vapi_init ()`
456	293	markom	`{`
457	304	markom	`nhandlers = 0;`
458			`vapi_handler = NULL;`
459			`if (!config.vapi.enabled)`
460			`return 0; /* Nothing to do */`
461
462			`if (!config.vapi.server_port) {`
463			`fprintf (stderr, "WARNING: server_port = 0, shutting down VAPI\n");`
464			`config.vapi.enabled = 0;`
465			`return 1;`
466			`}`
467	335	markom	`if (server_fd = get_server_socket("or1ksim", "tcp", config.vapi.server_port))`
468			`printf("VAPI Server started on port %d\n", config.vapi.server_port);`
469	304	markom	`else {`
470	293	markom	`perror ("Connection");`
471	304	markom	`return 1;`
472			`}`
473
474			`rebuild_fds ();`
475			`return 0;`
476			`}`
477
478			`/* Closes the VAPI */`
479			`void vapi_done ()`
480			`{`
481			`int i;`
482			`struct vapi_handler *t = vapi_handler;`
483	293	markom
484	304	markom	`for (i = 0; i < nfds; i++)`
485			`if (fds[i].fd)`
486	306	markom	`close (fds[i].fd);`
487	304	markom	`server_fd = 0;`
488			`config.vapi.enabled = 0;`
489			`serverIP = 0;`
490			`free (fds);`
491			`fds = 0;`
492			`while (vapi_handler) {`
493			`t = vapi_handler;`
494			`vapi_handler = vapi_handler->next;`
495			`free (t);`
496			`}`
497	293	markom	`}`
498
499			`/* Installs a vapi handler to VAPI id */`
500	336	markom	`void vapi_install_handler (unsigned long id, void (*read_func) (unsigned long, unsigned long))`

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