Databases
StackOverflow2013
Postsdbo
POAndroid NDK socket connectivity issues
 

Note that there are some explanatory texts on larger screens.

plurals
  1. POAndroid NDK socket connectivity issues
    primarykey
    data
    text
    <p>Ok, so I'm able to create a listening socket in my Android App using the following code:</p> <pre><code>bool CSocket::tcplisten(int port, int max, int mode) { if((sockid = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP)) == INVALID_SOCKET) return false; sockaddr_in addr; addr.sin_family = AF_INET; addr.sin_addr.s_addr = INADDR_ANY; addr.sin_port = htons(port); if(mode)setsync(1); if(bind(sockid, (struct sockaddr*)&amp;addr, sizeof(sockaddr)) == SOCKET_ERROR) { closesocket(sockid); return false; } if(listen(sockid, max) == SOCKET_ERROR) { closesocket(sockid); return false; } return true; } </code></pre> <p>I am then able to connect to it in the SAME process using the following code:</p> <pre><code>bool CSocket::tcpconnect(char *address, int port, int mode) { sockaddr_in addr; hostent* hostEntry; if((sockid = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP)) == SOCKET_ERROR) return false; if((hostEntry = gethostbyname(address)) == NULL) { closesocket(sockid); return false; } addr.sin_family = AF_INET; addr.sin_addr.s_addr = htonl(INADDR_ANY); addr.sin_port = htons((u_short)port); if(mode ==2)setsync(1); if(connect(sockid, (struct sockaddr*)&amp;addr, sizeof(sockaddr)) == SOCKET_ERROR) { closesocket(sockid); return false; } if(mode ==1)setsync(1); return true; } </code></pre> <p>The problem is, I am unable to connect to other machines running a listening socket or on remote machines like google.com. Any ideas why I can't get it to work?</p> <p>After some tweaking and probing, I found that the error occurs at the line:</p> <pre><code>if(connect(sockid, (struct sockaddr*)&amp;addr, sizeof(sockaddr)) == SOCKET_ERROR) { closesocket(sockid); return false; } </code></pre> <p>The errno is 111 ERCONNREFUSED... Please. ANY help would be appreciated. The application has full Internet access set in the permissions.... Any ideas? </p> <p>I have the same issues with my Linux build compiled with the same code...</p>
    singulars
    1. PO
      singulars
      1. PTAnswer
    1. This table or related slice is empty.
    1. PTQuestion
    1. USnterry
    1. USnterry
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. PO
      singulars
      1. PTAnswer
    1. VO
      singulars
      1. POAndroid NDK socket connectivity issues
      1. This table or related slice is empty.
      1. VTUpMod
    1. COSomething that immediately jumps out at me is that in the `bind` call you use `sizeof(sockaddr)` when it should be `sizeof(sockaddr_in)`. Doesn't matter here since they are often the same size, but will be different if you start using IPv6.
      singulars
      1. POAndroid NDK socket connectivity issues
      1. USSome programmer dude
    2. COYou need to add code to get the actual error from e.g. `connect` when it fails. This is done by checking the variable [`errno`](http://linux.die.net/man/3/errno) when the call fails. You can also use [`perror`](http://linux.die.net/man/3/perror) to print an appropriate error message, or [`strerror`](http://linux.die.net/man/3/strerror) to customize the message printed. Check the actual error and edit your question to have it and it will be _much_ easier to answer your question.
      singulars
      1. POAndroid NDK socket connectivity issues
      1. USSome programmer dude
    3. COOk, Ill post the error code this evening. I would have included it, but I didn't know about it....
      singulars
      1. POAndroid NDK socket connectivity issues
      1. USnterry
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload