#include <stdio.h>#include <ctype.h>#include <string.h>#include <stdlib.h>#include <unistd.h>#include <stdarg.h>/* Libraries for JTAG proxy server.  */#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 <errno.h>#include "gdb.h" /* partially copied from gdb/config/or1k */#include "jp2.h"/* connection to jp2 routines */int gdb_chain = -1;int gdb_read_reg(unsigned long adr, unsigned long *data) {  switch (gdb_chain) {    SC_RISC_DEBUG: return dbg_cpu_read32(adr, data) ? ERR_CRC : ERR_NONE;    SC_REGISTER:   return dbg_cpu_read_reg(adr, data) ? ERR_CRC : ERR_NONE;    SC_WISHBONE:   return dbg_wb_read32(adr, data) ? ERR_CRC : ERR_NONE;    default:       return JTAG_PROXY_INVALID_CHAIN;  }}int gdb_write_reg(unsigned long adr, unsigned long data) {  switch (gdb_chain) {    SC_RISC_DEBUG: return dbg_cpu_write32(adr, data) ? ERR_CRC : ERR_NONE;    SC_REGISTER:   return dbg_cpu_write_reg(adr, data) ? ERR_CRC : ERR_NONE;    SC_WISHBONE:   return dbg_wb_write32(adr, data) ? ERR_CRC : ERR_NONE;    default:       return JTAG_PROXY_INVALID_CHAIN;  }}int gdb_read_block(unsigned long adr, unsigned long *data, int len) {  switch (gdb_chain) {    SC_WISHBONE:   return dbg_wb_read_block32(adr, data, len) ? ERR_CRC : ERR_NONE;    default:       return JTAG_PROXY_INVALID_CHAIN;  }}int gdb_write_block(unsigned long adr, unsigned long *data, int len) {  switch (gdb_chain) {    SC_WISHBONE:   return dbg_wb_write_block32(adr, data, len) ? ERR_CRC : ERR_NONE;    default:       return JTAG_PROXY_INVALID_CHAIN;  }}int gdb_set_chain(int chain) {  switch (gdb_chain) {    SC_RISC_DEBUG:    SC_REGISTER:    SC_WISHBONE:   gdb_chain = chain;                   return ERR_NONE;    default:       return JTAG_PROXY_INVALID_CHAIN;  }}/************************   JTAG Server Routines ************************/unsigned int serverIP = 0;unsigned int serverPort = 0;unsigned int server_fd = 0;unsigned int gdb_fd = 0;static int gdb_read(void*, int);static int gdb_write(void*, int);static void ProtocolClean(int, int32_t);static int tcp_level = 0;/* Added by CZ 24/05/01 */int GetServerSocket(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 && (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((flags = fcntl(sockfd, F_GETFL, 0)) < 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;  }  serverPort = 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 HandleServerSocket(Boolean block) {  struct pollfd fds[2];  int n;  rebuild:  n = 0;  if(!server_fd && !gdb_fd) return;  if(server_fd) {    fds[n].fd = server_fd;    fds[n].events = POLLIN;    fds[n++].revents = 0;  }  if(gdb_fd) {    fds[n].fd = gdb_fd;    fds[n].events = POLLIN;    fds[n++].revents = 0;  }  while(1) {  switch(poll(fds, n, -1)) {    case 0:    case -1:      if(errno == EINTR) continue;      perror("poll");      server_fd = 0;      return;    default:      /* Make sure to handle the gdb port first! */      if (gdb_fd && (fds[0].revents && !server_fd || fds[1].revents && server_fd)) {        int revents = server_fd ? fds[1].revents : fds[0].revents;        if (revents & POLLIN) GDBRequest();        else {/* Error Occurred */          fprintf(stderr, "Received flags 0x%08x on gdb socket. Shutting down.\n", revents);          close(gdb_fd);          gdb_fd = 0;        }      }      if(fds[0].revents && server_fd) {        if(fds[0].revents & POLLIN) {          JTAGRequest();          goto rebuild;        } else { /* Error Occurred */            fprintf(stderr, "Received flags 0x%08x on server. Shutting down.\n", fds[0].revents);            close(server_fd);            server_fd = 0;            serverPort = 0;            serverIP = 0;            return;          }        }      break;    } /* End of switch statement */  } /* End of while statement */}void JTAGRequest() {  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;      serverPort = 0;      serverIP = 0;    }    return;  }  if(gdb_fd) {    close(fd);    return;  }  if((flags = fcntl(fd, F_GETFL,0)) < 0) {    sprintf(sTemp, "Unable to get flags for gdb socket %d", fd);    perror(sTemp);    close(fd);    return;  }    if(fcntl(fd, F_SETFL, flags | O_NONBLOCK) < 0) {    sprintf(sTemp, "Unable to set flags for gdb 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;  }  gdb_fd = fd;}