StackOverflow2013

Note that there are some explanatory texts on larger screens.

plurals

POtrouble accepting ipv6 requests on c web server
primarykey
Id
13864954
data
AcceptedAnswerId
13866099
AnswerCount
1
ClosedDate
CommentCount
1
CommunityOwnedDate
CreationDate
2012-12-13T17:11:45.627
FavoriteCount
0
LastActivityDate
2012-12-17T12:15:55.097
LastEditDate
LastEditorUserId
0
OwnerUserId
1871491
ParentId
0
PostTypeId
1
Score
0
ViewCount
334
LastEditorDisplayName
text
Body
<p>The following c function I wrote returns a file descriptor that accepts IPv4 connections but not IPv6. Could someone help me figure out what went wrong? I suspect I did not use getaddrinfo() correctly.</p> <p>Open file descriptor that listens to connections.</p> <pre><code>/* * open_listenfd - open and return a listening socket on port * Returns -1 and sets errno on Unix error. */ int open_listenfd(int port) { const char* hostname=0; // Converts port to string char* pName = malloc(numPlaces(port) + 1); sprintf(pName, "%d", port); const char* portname= pName; struct addrinfo hints; memset(&hints,0,sizeof(hints)); hints.ai_family=AF_UNSPEC; hints.ai_socktype=SOCK_STREAM; hints.ai_protocol= 0; hints.ai_flags=AI_PASSIVE|AI_ADDRCONFIG; struct addrinfo* res=0; int err=getaddrinfo(hostname,portname,&hints,&res); free(pName); if (err!=0) { return -1; } int listenfd, optval=1; struct sockaddr_in serveraddr; /* Create a socket descriptor */ if ((listenfd = socket(res->ai_family,res->ai_socktype, res->ai_protocol)) < 0) return -1; /* Eliminates "Address already in use" error from bind. */ if (setsockopt(listenfd, SOL_SOCKET, SO_REUSEADDR, (const void *)&optval , sizeof(int)) < 0) return -1; /* Listenfd will be an endpoint for all requests to port on any IP address for this host */ bzero((char *) &serveraddr, sizeof(serveraddr)); serveraddr.sin_family = /*AF_INET;*/ AF_UNSPEC; serveraddr.sin_addr.s_addr = htonl(INADDR_ANY); serveraddr.sin_port = htons((unsigned short)port); if (bind(listenfd, res->ai_addr, res->ai_addrlen/*(SA *)&serveraddr, sizeof(serveraddr)*/) < 0) return -1; freeaddrinfo(res); /* Make it a listening socket ready to accept connection requests */ if (listen(listenfd, 1024) < 0) return -1; return listenfd; } </code></pre>
Tags
<c><webserver><ipv6>
Title
trouble accepting ipv6 requests on c web server
singulars
PostAcceptedAnswerId
1. PO
  singulars
  PostTypePostTypeId
  PTAnswer
PostParentId
1. This table or related slice is empty.
PostTypePostTypeId
1. PTQuestion
UserLastEditorUserId
1. This table or related slice is empty.
UserOwnerUserId
1. USMLD_Saturn
plurals
PostLinksPostIdRelatedPostId
1. PL
  singulars
  LinkTypeLinkTypeId
  LTLinked
PostLinksRelatedPostIdPostId
1. This table or related slice is empty.
PostsAcceptedAnswerId
1. This table or related slice is empty.
PostsParentIdCreationDate
1. PO
  singulars
  PostTypePostTypeId
  PTAnswer
VotesPostIdCreationDate
1. This table or related slice is empty.
CommentsPostId
1. COYou want the server to listen for ipv6 connections only or also?
  singulars
  PostPostId
  POtrouble accepting ipv6 requests on c web server
  UserUserId
  USalk

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.