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

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