lwip/netio.c

   1 #include <stdlib.h>
   2 #include <string.h>
   3 #include <reent.h>
   4 #include <errno.h>
   5 #undef errno
   6 extern int errno;
   7
   8 #include <sys/iosupport.h>
   9 #include "lwip/ip_addr.h"
  10 #include "network.h"
  11 int netio_open(struct _reent *r, void *fileStruct, const char *path,int flags,int mode);
  12 int netio_close(struct _reent *r,int fd);
  13 int netio_write(struct _reent *r,int fd,const char *ptr,size_t len);
  14 int netio_read(struct _reent *r,int fd,char *ptr,size_t len);
  15
  16 //---------------------------------------------------------------------------------
  17 const devoptab_t dotab_stdnet = {
  18 //---------------------------------------------------------------------------------
  19         "stdnet",               // device name
  20         0,                              // size of file structure
  21         netio_open,             // device open
  22         netio_close,    // device close
  23         netio_write,    // device write
  24         netio_read,             // device read
  25         NULL,                   // device seek
  26         NULL,                   // device fstat
  27         NULL,                   // device stat
  28         NULL,                   // device link
  29         NULL,                   // device unlink
  30         NULL,                   // device chdir
  31         NULL,                   // device rename
  32         NULL,                   // device mkdir
  33         0,                              // dirStateSize
  34         NULL,                   // device diropen_r
  35         NULL,                   // device dirreset_r
  36         NULL,                   // device dirnext_r
  37         NULL,                   // device dirclose_r
  38         NULL                    // device statvfs_r
  39 };
  40
  41 int netio_open(struct _reent *r, void *fileStruct, const char *path,int flags,int mode)
  42 {
  43         char *cport = NULL;
  44         int optval = 1,nport = -1,udp_sock = INVALID_SOCKET;
  45         struct sockaddr_in name;
  46         socklen_t namelen = sizeof(struct sockaddr);
  47
  48         if(net_init()==SOCKET_ERROR) return -1;
  49
  50         udp_sock = net_socket(AF_INET,SOCK_STREAM,IPPROTO_TCP);
  51         if(udp_sock==INVALID_SOCKET) return -1;
  52
  53         cport = strchr(path,':');
  54         if(cport) {
  55                 *cport++ = '\0';
  56                 nport = atoi(cport);
  57         }
  58         if(nport==-1) nport = 7;        //try to connect to the well known port 7
  59
  60         name.sin_addr.s_addr = inet_addr(path);
  61         name.sin_port = htons(nport);
  62         name.sin_family = AF_INET;
  63         if(net_connect(udp_sock,(struct sockaddr*)&name,namelen)==-1) {
  64                 net_close(udp_sock);
  65                 return -1;
  66         }
  67         net_setsockopt(udp_sock,IPPROTO_TCP,TCP_NODELAY,&optval,sizeof(optval));
  68
  69         return udp_sock;
  70 }
  71
  72 int netio_close(struct _reent *r,int fd)
  73 {
  74         if(fd<0) return -1;
  75
  76         net_close(fd);
  77
  78         return 0;
  79 }
  80
  81 int netio_write(struct _reent *r,int fd,const char *ptr,size_t len)
  82 {
  83         int ret;
  84
  85         if(fd<0) return -1;
  86
  87         ret = net_write(fd,(void*)ptr,len);
  88
  89         return ret;
  90 }
  91
  92 int netio_read(struct _reent *r,int fd,char *ptr,size_t len)
  93 {
  94         int ret;
  95
  96         if(fd<0) return -1;
  97
  98         ret = net_read(fd,ptr,len);
  99
 100         return ret;
 101 }