[asterisk-bugs] [Asterisk 0019185]: Asterisk crashes with a segfault if current host cannot be resolved via DNS.

[Asterisk Bug Tracker]

A NOTE has been added to this issue. 
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https://issues.asterisk.org/view.php?id=19185 
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Reported By:                dswartz
Assigned To:                may213
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Project:                    Asterisk
Issue ID:                   19185
Category:                   Addons/chan_ooh323
Reproducibility:            always
Severity:                   crash
Priority:                   normal
Status:                     feedback
Asterisk Version:           1.8.3.3 
JIRA:                        
Regression:                 No 
Reviewboard Link:            
SVN Branch (only for SVN checkouts, not tarball releases): N/A 
SVN Revision (number only!):  
Request Review:              
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Date Submitted:             2011-04-26 13:46 CDT
Last Modified:              2011-05-04 15:44 CDT
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Summary:                    Asterisk crashes with a segfault if current host
cannot be resolved via DNS.
Description: 
int ooGetLocalIPAddress(char * pIPAddrs)
{
   int ret;
   struct hostent *hp;
   struct ast_hostent phost;
   char hostname[100];

   if(pIPAddrs == NULL)
      return -1; /* Need to find suitable return value */
   ret = gethostname(hostname, 100);
   if(ret == 0)
   {
      if (!(hp = ast_gethostbyname(hostname, &phost))) {
                        struct in_addr i;
                        memcpy(&i, hp->h_addr, sizeof(i));

If gethostname() fails, and then ast_gethostbyname() does as well, we will
go to the memcpy, dereferencing the null 'hp'.

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Relationships       ID      Summary
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related to          0018278 [patch] ipv6 support in chan_ooh323
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 (0134453) may213 (manager) - 2011-05-04 15:44
 https://issues.asterisk.org/view.php?id=19185#c134453 
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Due to this fixed within new feature codes that goes to the trunk only i
produce separate bug fix here. 

Issue History 
Date Modified    Username       Field                    Change               
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2011-05-04 15:44 may213         Note Added: 0134453                          
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