BBC BASIC Programmers' Reference

User Tools

Site Tools

Trace:
finding_20the_20host_20ip_20address

Differences

This shows you the differences between two versions of the page.

Link to this comparison view

Next revision		Previous revision
finding_20the_20host_20ip_20address [2018/03/31 13:19] – external edit 127.0.0.1finding_20the_20host_20ip_20address [2024/01/05 00:22] (current) – external edit 127.0.0.1
Line 2: Line 2:
  
 //by Richard Russell, May 2007//\\ \\  It is easy to discover the host PC's network name using the **FN_gethostname** function in the [[http://www.bbcbasic.co.uk/bbcwin/manual/bbcwing.html#socklib|SOCKLIB]] library, but there is no equivalent function for discovering its **IP** (Internet Protocol) **address**. However that can easily be achieved using a little code:\\ \\  //by Richard Russell, May 2007//\\ \\  It is easy to discover the host PC's network name using the **FN_gethostname** function in the [[http://www.bbcbasic.co.uk/bbcwin/manual/bbcwing.html#socklib|SOCKLIB]] library, but there is no equivalent function for discovering its **IP** (Internet Protocol) **address**. However that can easily be achieved using a little code:\\ \\ 
 +<code bb4w>
         INSTALL @lib$+"SOCKLIB"         INSTALL @lib$+"SOCKLIB"
         PROC_initsockets         PROC_initsockets
Line 7: Line 8:
         hostent% = FN_sethost(FN_gethostname)         hostent% = FN_sethost(FN_gethostname)
         hostip% = !!hostent%!12         hostip% = !!hostent%!12
 +</code>
 The code sets **hostip%** to the host IP address; note the use of three exclamation marks! The **INSTALL** and **PROC_initsockets** statements are included here for completeness, but of course it is quite likely that your program has already executed them earlier in the code.\\ \\  If you need the IP address as a string you can create that from **hostip%** as follows:\\ \\  The code sets **hostip%** to the host IP address; note the use of three exclamation marks! The **INSTALL** and **PROC_initsockets** statements are included here for completeness, but of course it is quite likely that your program has already executed them earlier in the code.\\ \\  If you need the IP address as a string you can create that from **hostip%** as follows:\\ \\ 
 +<code bb4w>
         SYS `inet_ntoa`, hostip% TO lpszip%         SYS `inet_ntoa`, hostip% TO lpszip%
         hostip$ = $$lpszip%         hostip$ = $$lpszip%
 +</code>
 This will set **hostip$** to a string in the conventional 'dot' notation "aa.bb.cc.dd". This will set **hostip$** to a string in the conventional 'dot' notation "aa.bb.cc.dd".
finding_20the_20host_20ip_20address.1522502360.txt.gz · Last modified: 2024/01/05 00:17 (external edit)