mirror of
https://github.com/tuxbox-neutrino/neutrino.git
synced 2025-08-27 15:32:59 +02:00
our current experimental Neutrino branch
git-svn-id: file:///home/bas/coolstream_public_svn/THIRDPARTY/applications/neutrino-experimental@27 e54a6e83-5905-42d5-8d5c-058d10e6a962
This commit is contained in:
mrcolor
260
lib/libnet/libnet.c
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260
lib/libnet/libnet.c
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@@ -0,0 +1,260 @@
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#include <string.h>
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#include <unistd.h>
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#include <stdio.h>
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#include <sys/ioctl.h>
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#include <sys/file.h>
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#include <sys/time.h>
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#include <sys/socket.h>
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#include <netinet/in.h>
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#include <netdb.h>
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#include <linux/route.h>
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static void scanip( char *str, unsigned char *to )
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{
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int val;
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int c;
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char *sp;
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int b=4;
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for( sp=str; b; b-- )
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{
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val=0;
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for(; (*sp != 0) && (*sp != '.'); sp++)
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{
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c = *sp - '0';
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if (( c < 0 ) || ( c>=10))
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break;
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val=(val*10)+c;
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}
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*to=val;
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to++;
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if ( !*sp )
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break;
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sp++;
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}
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}
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int netSetIP( char *dev, char *ip, char *mask, char *brdcast )
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{
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int fd;
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struct ifreq req;
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int rc=-1;
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unsigned char adr_ip[4];
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unsigned char adr_mask[4];
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unsigned char adr_brdcast[4];
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struct sockaddr_in addr;
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fd=socket(AF_INET,SOCK_DGRAM,0);
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if ( !fd )
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return -1;
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scanip( ip, adr_ip );
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scanip( mask, adr_mask );
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scanip( brdcast, adr_brdcast );
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/* init structures */
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bzero(&req,sizeof(req));
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strcpy(req.ifr_name,dev);
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bzero(&addr,sizeof(addr));
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addr.sin_family = AF_INET;
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addr.sin_addr.s_addr = *((unsigned long *) adr_ip);
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memcpy(&req.ifr_addr,&addr,sizeof(addr));
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if( ioctl(fd,SIOCSIFADDR,&req) < 0 )
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goto abbruch;
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addr.sin_addr.s_addr = *((unsigned long *) adr_mask);
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memcpy(&req.ifr_addr,&addr,sizeof(addr));
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if( ioctl(fd,SIOCSIFNETMASK,&req) < 0 )
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goto abbruch;
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addr.sin_addr.s_addr = *((unsigned long *) adr_brdcast);
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memcpy(&req.ifr_addr,&addr,sizeof(addr));
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if( ioctl(fd,SIOCSIFBRDADDR,&req) < 0 )
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goto abbruch;
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rc = 0;
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abbruch:
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close(fd);
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return rc;
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}
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void netGetIP( char *dev, char *ip, char *mask, char *brdcast )
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{
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int fd;
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struct ifreq req;
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struct sockaddr_in *saddr;
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unsigned char *addr;
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*ip=0;
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*mask=0;
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*brdcast=0;
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fd=socket(AF_INET,SOCK_DGRAM,0);
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if ( !fd )
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return;
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bzero(&req,sizeof(req));
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strcpy(req.ifr_name,dev);
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saddr = (struct sockaddr_in *) &req.ifr_addr;
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addr= (unsigned char*) &saddr->sin_addr.s_addr;
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if( ioctl(fd,SIOCGIFADDR,&req) == 0 )
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sprintf(ip,"%d.%d.%d.%d",addr[0],addr[1],addr[2],addr[3]);
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if( ioctl(fd,SIOCGIFNETMASK,&req) == 0 )
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sprintf(mask,"%d.%d.%d.%d",addr[0],addr[1],addr[2],addr[3]);
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if( ioctl(fd,SIOCGIFBRDADDR,&req) == 0 )
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sprintf(brdcast,"%d.%d.%d.%d",addr[0],addr[1],addr[2],addr[3]);
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close(fd);
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return;
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}
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void netSetDefaultRoute( char *gw )
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{
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struct rtentry re;
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struct sockaddr_in *in_addr;
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unsigned char *addr;
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int fd;
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unsigned char adr_gw[4];
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scanip( gw, adr_gw );
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memset(&re,0,sizeof(struct rtentry));
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in_addr = (struct sockaddr_in *)&re.rt_dst;
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in_addr->sin_family = AF_INET;
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in_addr = (struct sockaddr_in *)&re.rt_gateway;
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in_addr->sin_family = AF_INET;
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addr=(unsigned char*)&in_addr->sin_addr.s_addr;
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in_addr = (struct sockaddr_in *)&re.rt_genmask;
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in_addr->sin_family = AF_INET;
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fd=socket(AF_INET,SOCK_DGRAM,0);
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if ( fd < 0 )
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return;
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re.rt_flags = RTF_GATEWAY | RTF_UP;
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memcpy(addr,adr_gw,4);
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ioctl(fd,SIOCADDRT,&re);
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close(fd);
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return;
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}
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void netGetDefaultRoute( char *ip )
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{
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FILE *fp;
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char interface[9];
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unsigned char destination[4];
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unsigned char gateway[4];
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char zeile[256];
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*ip = 0 ;
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fp = fopen("/proc/net/route","r");
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if (fp == NULL)
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return;
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fgets(zeile,sizeof(zeile),fp);
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while(fgets(zeile,sizeof(zeile),fp))
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{
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sscanf(zeile,"%8s %x %x",interface,(unsigned *) destination,(unsigned *) gateway);
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if (*(unsigned *)destination == 0)
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{
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sprintf(ip,"%d.%d.%d.%d",gateway[0],gateway[1],gateway[2],gateway[3]);
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break;
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}
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}
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fclose(fp);
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}
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static char dombuf[256];
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static char hostbuf[256];
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static char domis=0;
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static char hostis=0;
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char *netGetDomainname( void )
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{
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if (!domis)
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getdomainname( dombuf, 256 );
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domis=1;
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return dombuf;
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}
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void netSetDomainname( char *dom )
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{
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strcpy(dombuf,dom);
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domis=1;
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setdomainname(dombuf,strlen(dombuf)+1);
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}
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char *netGetHostname( void )
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{
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if (!hostis)
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gethostname( hostbuf, 256 );
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hostis=1;
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return hostbuf;
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}
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void netSetHostname( char *host )
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{
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strcpy(hostbuf,host);
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hostis=1;
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sethostname(hostbuf,strlen(hostbuf)+1);
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}
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void netSetNameserver(const char * const ip)
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{
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FILE *fp;
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fp = fopen("/etc/resolv.conf","w");
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if (!fp)
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return;
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#if 0
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char *dom;
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dom=netGetDomainname();
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if (dom && strlen(dom)>2)
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fprintf(fp,"search %s\n",dom);
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#endif
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fprintf(fp, "# generated by neutrino\n");
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if ((ip != NULL) && (strlen(ip) > 0))
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fprintf(fp,"nameserver %s\n",ip);
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fclose(fp);
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}
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void netGetNameserver( char *ip )
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{
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FILE *fp;
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char zeile[256];
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char *index;
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unsigned zaehler;
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*ip = 0;
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fp = fopen("/etc/resolv.conf","r");
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if (!fp)
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return;
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while (fgets(zeile,sizeof(zeile),fp))
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{
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if (!strncasecmp(zeile,"nameserver",10))
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{
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index = zeile + 10;
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while ( (*index == ' ') || (*index == '\t') )
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index++;
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zaehler = 0;
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while ( (zaehler < 15) && ( ((*index >= '0') && (*index <= '9')) || (*index == '.')))
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ip[zaehler++] = *(index++);
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ip[zaehler] = 0;
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break;
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}
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}
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fclose(fp);
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}
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