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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"
#include "vapi.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;
}
 
/* Added by Erez 09/12/01 */
void vapi_write_log_file(VAPI_COMMAND command, unsigned long devid, unsigned long data)
{
  if (!runtime.vapi.vapi_file)
    return;
  if (config.vapi.log_device_id && devid <= VAPI_MAX_DEVID)
    fprintf (runtime.vapi.vapi_file, "%04x", devid);
  fprintf (runtime.vapi.vapi_file, "%1x%08x\n", command, data);
}
 
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;
        rebuild_fds ();
      }
    } else {
      fprintf (stderr, "WARNING: Test with id %x not registered. Ignoring.\n", id);
      close(fd); /* kill the connection */
      return;
    }
    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;
      rebuild_fds ();
    }
    return;
  }
 
  vapi_write_log_file (0, t->id, data);
  debug (4, "[%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);
  }
 
  debug(5, ".");
 
  /* 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 ();
 
  if ((runtime.vapi.vapi_file = fopen (config.vapi.vapi_fn, "wt+")) == NULL)
    fprintf (stderr, "WARNING: cannot open VAPI log file\n");
 
  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;
  if (runtime.vapi.vapi_file) {
    /* Mark end of simulation */
    vapi_write_log_file (2, t->id, 0);
    fclose (runtime.vapi.vapi_file);
  }
 
  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;
 
  debug(4, "vapi_install_handler %08x, %08x\n", id, read_func);
  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 = find_handler (id);
    if (!tt) {
      tt = add_handler (id);
      tt->read_func = read_func;
    } else {
      tt->read_func = read_func;
      rebuild_fds ();
    }
  }
}
 
/* 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 (" 0x%x", t->id);
    }
  }
  return numu;
}
 
/* Sends a packet to specified test */
int vapi_send (unsigned long id, unsigned long data)
{
  debug (4, "vapi_send [%08x %08x]\n", id, data);
  vapi_write_log_file (1, id, 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	439	erez	`#include "vapi.h"`
45	293	markom
46	304	markom	`static unsigned int serverIP = 0;`
47	293	markom
48	304	markom	`static unsigned int server_fd = 0;`
49			`static unsigned int nhandlers = 0;`
50
51	293	markom	`void server_request(void);`
52
53			`static int tcp_level = 0;`
54
55	304	markom	`static struct vapi_handler {`
56			`int fd;`
57	293	markom	`unsigned long id;`
58	336	markom	`void (*read_func)(unsigned long, unsigned long);`
59	293	markom	`struct vapi_handler *next;`
60	304	markom	`int temp;`
61	293	markom	`} *vapi_handler;`
62
63	304	markom	`/* Structure for polling, it is cached, that it doesn't have to be rebuilt each time */`
64			`static struct pollfd *fds = NULL;`
65			`static int nfds = 0;`
66
67			`/* Rebuilds the fds structures; see fds. */`
68			`void rebuild_fds () {`
69			`struct vapi_handler *t;`
70			`if (fds)`
71			`free (fds);`
72			`fds = (struct pollfd ) malloc (sizeof (struct pollfd) (nhandlers + 1));`
73			`if (!fds) {`
74			`fprintf (stderr, "FATAL: Out of memory.\n");`
75			`exit (1);`
76			`}`
77
78			`nfds = 0;`
79			`fds[nfds].fd = server_fd;`
80			`fds[nfds].events = POLLIN;`
81			`fds[nfds++].revents = 0;`
82
83			`for (t = vapi_handler; t; t = t->next) {`
84			`if (t->fd) {`
85			`t->temp = nfds;`
86			`fds[nfds].fd = t->fd;`
87			`fds[nfds].events = POLLIN;`
88			`fds[nfds++].revents = 0;`
89			`} else`
90			`t->temp = -1;`
91			`}`
92			`}`
93
94			`/* Finds a handler with given ID, return it, NULL if not found. */`
95			`static struct vapi_handler *find_handler (unsigned long id) {`
96			`struct vapi_handler *t = vapi_handler;`
97			`while (t && t->id != id)`
98			`t = t->next;`
99			`return t;`
100			`}`
101
102			`/* Adds a handler with given id and returns it. */`
103			`static struct vapi_handler *add_handler (unsigned long id) {`
104			`struct vapi_handler **t = &vapi_handler;`
105			`struct vapi_handler *tt;`
106			`while ((*t))`
107			`t = &(*t)->next;`
108			`tt = (struct vapi_handler *)malloc (sizeof (struct vapi_handler));`
109			`tt->next = NULL;`
110			`tt->id = id;`
111			`tt->read_func = NULL;`
112			`tt->fd = 0;`
113			`(*t) = tt;`
114			`free (fds);`
115			`fds = NULL;`
116			`nhandlers++;`
117			`rebuild_fds ();`
118			`return tt;`
119			`}`
120
121	419	erez	`/* Added by Erez 09/12/01 */`
122	439	erez	`void vapi_write_log_file(VAPI_COMMAND command, unsigned long devid, unsigned long data)`
123	419	erez	`{`
124	439	erez	`if (!runtime.vapi.vapi_file)`
125			`return;`
126	440	erez	`if (config.vapi.log_device_id && devid <= VAPI_MAX_DEVID)`
127			`fprintf (runtime.vapi.vapi_file, "%04x", devid);`
128	439	erez	`fprintf (runtime.vapi.vapi_file, "%1x%08x\n", command, data);`
129	419	erez	`}`
130
131	304	markom	`static int vapi_write_stream(int fd, void* buf, int len)`
132			`{`
133			`int n;`
134			`char* w_buf = (char*)buf;`
135			`struct pollfd block;`
136
137			`while(len) {`
138			`if((n = write(fd, w_buf, len)) < 0) {`
139			`switch(errno) {`
140			`case EWOULDBLOCK: /* or EAGAIN */`
141			`/* We've been called on a descriptor marked`
142			`for nonblocking I/O. We better simulate`
143			`blocking behavior. */`
144			`block.fd = fd;`
145			`block.events = POLLOUT;`
146			`block.revents = 0;`
147			`poll(&block,1,-1);`
148			`continue;`
149			`case EINTR:`
150			`continue;`
151			`case EPIPE:`
152			`close(fd);`
153			`fd = 0;`
154			`return -1;`
155			`default:`
156			`return -1;`
157			`}`
158			`} else {`
159			`len -= n;`
160			`w_buf += n;`
161			`}`
162			`}`
163			`return 0;`
164			`}`
165
166			`static int vapi_read_stream(int fd, void* buf, int len)`
167			`{`
168			`int n;`
169			`char* r_buf = (char*)buf;`
170			`struct pollfd block;`
171
172			`while(len) {`
173			`if((n = read(fd,r_buf,len)) < 0) {`
174			`switch(errno) {`
175			`case EWOULDBLOCK: /* or EAGAIN */`
176			`/* We've been called on a descriptor marked`
177			`for nonblocking I/O. We better simulate`
178			`blocking behavior. */`
179			`block.fd = fd;`
180			`block.events = POLLIN;`
181			`block.revents = 0;`
182			`poll(&block,1,-1);`
183			`continue;`
184			`case EINTR:`
185			`continue;`
186			`default:`
187			`return -1;`
188			`}`
189			`} else if(n == 0) {`
190			`close(fd);`
191			`fd = 0;`
192			`return -1;`
193			`} else {`
194			`len -= n;`
195			`r_buf += n;`
196			`}`
197			`}`
198			`return 0;`
199			`}`
200
201	293	markom	`/* Added by CZ 24/05/01 */`
202			`int get_server_socket(const char* name,const char* proto,int port)`
203			`{`
204			`struct servent *service;`
205			`struct protoent *protocol;`
206			`struct sockaddr_in sa;`
207			`struct hostent *hp;`
208			`int sockfd;`
209			`char myname[256];`
210			`int flags;`
211			`char sTemp[256];`
212
213			`/* First, get the protocol number of TCP */`
214			`if(!(protocol = getprotobyname(proto))) {`
215			`sprintf(sTemp,"Unable to load protocol \"%s\"",proto);`
216			`perror(sTemp);`
217			`return 0;`
218			`}`
219			`tcp_level = protocol->p_proto; /* Save for later */`
220
221			`/* If we weren't passed a non standard port, get the port`
222			`from the services directory. */`
223			`if(!port) {`
224			`if(service = getservbyname(name,protocol->p_name))`
225			`port = ntohs(service->s_port);`
226			`}`
227	336	markom
228	293	markom	`/* Create the socket using the TCP protocol */`
229			`if((sockfd = socket(PF_INET,SOCK_STREAM,protocol->p_proto)) < 0) {`
230			`perror("Unable to create socket");`
231			`return 0;`
232			`}`
233	336	markom
234	293	markom	`flags = 1;`
235			`if(setsockopt(sockfd,SOL_SOCKET,SO_REUSEADDR,(const char*)&flags,sizeof(int)) < 0) {`
236			`sprintf(sTemp,"Can not set SO_REUSEADDR option on socket %d",sockfd);`
237			`perror(sTemp);`
238			`close(sockfd);`
239			`return 0;`
240			`}`
241
242			`/* The server should also be non blocking. Get the current flags. */`
243			`if(fcntl(sockfd,F_GETFL,&flags) < 0) {`
244			`sprintf(sTemp,"Unable to get flags for socket %d",sockfd);`
245			`perror(sTemp);`
246			`close(sockfd);`
247			`return 0;`
248			`}`
249
250			`/* Set the nonblocking flag */`
251			`if(fcntl(sockfd,F_SETFL, flags \| O_NONBLOCK) < 0) {`
252			`sprintf(sTemp,"Unable to set flags for socket %d to value 0x%08x",`
253			`sockfd,flags \| O_NONBLOCK);`
254			`perror(sTemp);`
255			`close(sockfd);`
256			`return 0;`
257			`}`
258
259			`/* Find out what our address is */`
260			`memset(&sa,0,sizeof(struct sockaddr_in));`
261			`gethostname(myname,sizeof(myname));`
262			`if(!(hp = gethostbyname(myname))) {`
263			`perror("Unable to read hostname");`
264			`close(sockfd);`
265			`return 0;`
266			`}`
267
268			`/* Bind our socket to the appropriate address */`
269			`sa.sin_family = hp->h_addrtype;`
270			`sa.sin_port = htons(port);`
271			`if(bind(sockfd,(struct sockaddr*)&sa,sizeof(struct sockaddr_in)) < 0) {`
272			`sprintf(sTemp,"Unable to bind socket %d to port %d",sockfd,port);`
273			`perror(sTemp);`
274			`close(sockfd);`
275			`return 0;`
276			`}`
277			`serverIP = sa.sin_addr.s_addr;`
278			`flags = sizeof(struct sockaddr_in);`
279			`if(getsockname(sockfd,(struct sockaddr*)&sa,&flags) < 0) {`
280			`sprintf(sTemp,"Unable to get socket information for socket %d",sockfd);`
281			`perror(sTemp);`
282			`close(sockfd);`
283			`return 0;`
284			`}`
285			`config.vapi.server_port = ntohs(sa.sin_port);`
286
287			`/* Set the backlog to 1 connections */`
288			`if(listen(sockfd,1) < 0) {`
289			`sprintf(sTemp,"Unable to set backlog on socket %d to %d",sockfd,1);`
290			`perror(sTemp);`
291			`close(sockfd);`
292			`return 0;`
293			`}`
294
295			`return sockfd;`
296			`}`
297
298			`void server_request()`
299			`{`
300			`struct sockaddr_in sa;`
301			`struct sockaddr* addr = (struct sockaddr*)&sa;`
302			`int n = sizeof(struct sockaddr_in);`
303	336	markom	`int fd = accept(server_fd, addr, &n);`
304	293	markom	`int on_off = 0; /* Turn off Nagel's algorithm on the socket */`
305			`int flags;`
306			`char sTemp[256];`
307
308			`if(fd < 0) {`
309			`/* This is valid, because a connection could have started,`
310			`and then terminated due to a protocol error or user`
311			`initiation before the accept could take place. */`
312			`if(errno != EWOULDBLOCK && errno != EAGAIN) {`
313			`perror("accept");`
314			`close(server_fd);`
315			`server_fd = 0;`
316	304	markom	`config.vapi.enabled = 0;`
317	293	markom	`serverIP = 0;`
318	336	markom	`}`
319	293	markom	`return;`
320			`}`
321
322			`if(fcntl(fd,F_GETFL,&flags) < 0) {`
323			`sprintf(sTemp,"Unable to get flags for vapi socket %d",fd);`
324			`perror(sTemp);`
325			`close(fd);`
326			`return;`
327			`}`
328
329			`if(fcntl(fd,F_SETFL, flags \| O_NONBLOCK) < 0) {`
330			`sprintf(sTemp,"Unable to set flags for vapi socket %d to value 0x%08x",`
331			`fd,flags \| O_NONBLOCK);`
332			`perror(sTemp);`
333			`close(fd);`
334			`return;`
335			`}`
336
337			`if(setsockopt(fd,tcp_level,TCP_NODELAY,&on_off,sizeof(int)) < 0) {`
338			`sprintf(sTemp,"Unable to disable Nagel's algorithm for socket %d.\nsetsockopt",fd);`
339			`perror(sTemp);`
340			`close(fd);`
341			`return;`
342			`}`
343	304	markom
344			`/* Install new handler */`
345			`{`
346			`unsigned long id;`
347			`struct vapi_handler *t;`
348			`if (vapi_read_stream (fd, &id, sizeof (id))) {`
349			`perror ("Cannot get id");`
350			`close (fd);`
351			`return;`
352	293	markom	`}`
353	304	markom	`t = find_handler (id);`
354	355	markom	`if (t) {`
355	304	markom	`if (t->fd) {`
356			`fprintf (stderr, "WARNING: Test with id %x already connected. Ignoring.\n", id);`
357			`close (fd);`
358			`return;`
359	355	markom	`} else {`
360			`t->fd = fd;`
361			`rebuild_fds ();`
362			`}`
363			`} else {`
364			`fprintf (stderr, "WARNING: Test with id %x not registered. Ignoring.\n", id);`
365			`close(fd); /* kill the connection */`
366			`return;`
367	293	markom	`}`
368	304	markom	`if(config.sim.verbose)`
369	336	markom	`printf ("\nConnection with test (id %x) established.\n", id);`
370	293	markom	`}`
371			`}`
372
373			`static int write_packet (unsigned long id, unsigned long data) {`
374	304	markom	`struct vapi_handler *t = find_handler (id);`
375			`if (!t \|\| !t->fd)`
376			`return 1;`
377	293	markom	`id = htonl (id);`
378	304	markom	`if (vapi_write_stream(t->fd, &id, sizeof (id)) < 0)`
379	293	markom	`return 1;`
380			`data = htonl (data);`
381	304	markom	`if (vapi_write_stream(t->fd, &data, sizeof (data)) < 0)`
382	293	markom	`return 1;`
383			`return 0;`
384			`}`
385
386	304	markom	`static int read_packet (unsigned long id, unsigned long *data) {`
387			`unsigned long t_id;`
388			`struct vapi_handler *t = find_handler (id);`
389			`if (!t \|\| !t->fd)`
390	293	markom	`return 1;`
391	304	markom	`if (vapi_read_stream(t->fd, &t_id, sizeof (unsigned long)) < 0)`
392	293	markom	`return 1;`
393	304	markom	`t_id = htonl (t_id);`
394			`if (t_id != id) {`
395			`fprintf (stderr, "IDs not the same (got %x, expected %x)\n", t_id, id);`
396			`return 1;`
397			`}`
398			`if (vapi_read_stream(t->fd, data, sizeof (unsigned long)) < 0)`
399			`return 1;`
400	293	markom	`data = htonl (data);`
401			`return 0;`
402	304	markom	`}`
403	293	markom
404	304	markom	`static void vapi_request (struct vapi_handler *t) {`
405			`unsigned long data;`
406			`if(read_packet (t->id, &data)) {`
407			`if(t->fd) {`
408	293	markom	`perror("vapi read");`
409	304	markom	`close(t->fd);`
410			`t->fd = 0;`
411	361	markom	`rebuild_fds ();`
412	293	markom	`}`
413			`return;`
414			`}`
415
416	439	erez	`vapi_write_log_file (0, t->id, data);`
417	355	markom	`debug (4, "[%08x, %08x]\n", t->id, data);`
418	304	markom	`if (!t->read_func)`
419			`fprintf (stderr, "WARNING: packet sent to undefined id %x, %x\n", t->id, data);`
420	293	markom	`else`
421	336	markom	`t->read_func(t->id, data);`
422	293	markom	`}`
423
424			`void vapi_check ()`
425			`{`
426	304	markom	`struct vapi_handler *t;`
427	293	markom
428	304	markom	`if (!server_fd \|\| !fds) {`
429			`fprintf (stderr, "FATAL: Unable to maintain VAPI server.\n");`
430			`exit (1);`
431	293	markom	`}`
432
433	361	markom	`debug(5, ".");`
434	355	markom
435	304	markom	`/* Handle everything in queue. */`
436	293	markom	`while(1) {`
437	304	markom	`switch(poll(fds, nfds, 0)) {`
438	293	markom	`case -1:`
439			`if(errno == EINTR)`
440			`continue;`
441			`perror("poll");`
442	304	markom	`if (server_fd)`
443			`close(server_fd);`
444			`config.vapi.enabled = 0;`
445			`serverIP = 0;`
446			`return;`
447	293	markom	`case 0: /* Nothing interesting going on */`
448			`return;`
449			`default:`
450	304	markom	`/* Handle the vapi ports first. */`
451			`for (t = vapi_handler; t; t = t->next)`
452			`if (t->temp >= 0 && fds[t->temp].revents)`
453			`vapi_request (t);`
454	293	markom
455	304	markom	`if(fds[0].revents) {`
456	293	markom	`if(fds[0].revents & POLLIN)`
457			`server_request();`
458			`else { /* Error Occurred */`
459	304	markom	`fprintf(stderr,"Received flags 0x%08x on server. Shutting down.\n", fds[0].revents);`
460			`if (server_fd)`
461			`close(server_fd);`
462	293	markom	`server_fd = 0;`
463	304	markom	`config.vapi.enabled = 0;`
464	293	markom	`serverIP = 0;`
465			`}`
466			`}`
467			`break;`
468			`} /* End of switch statement */`
469			`} /* End of while statement */`
470			`}`
471
472	304	markom	`/* Inits the VAPI, according to sim-config */`
473			`int vapi_init ()`
474	293	markom	`{`
475	304	markom	`nhandlers = 0;`
476			`vapi_handler = NULL;`
477			`if (!config.vapi.enabled)`
478			`return 0; /* Nothing to do */`
479
480			`if (!config.vapi.server_port) {`
481			`fprintf (stderr, "WARNING: server_port = 0, shutting down VAPI\n");`
482			`config.vapi.enabled = 0;`
483			`return 1;`
484			`}`
485	335	markom	`if (server_fd = get_server_socket("or1ksim", "tcp", config.vapi.server_port))`
486			`printf("VAPI Server started on port %d\n", config.vapi.server_port);`
487	304	markom	`else {`
488	293	markom	`perror ("Connection");`
489	304	markom	`return 1;`
490			`}`
491
492			`rebuild_fds ();`
493	355	markom
494	361	markom	`if ((runtime.vapi.vapi_file = fopen (config.vapi.vapi_fn, "wt+")) == NULL)`
495	355	markom	`fprintf (stderr, "WARNING: cannot open VAPI log file\n");`
496
497	304	markom	`return 0;`
498			`}`
499
500			`/* Closes the VAPI */`

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