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miniupnpd/minissdp.c: comments about binding "notify" sockets 

Explain why bind() is called in functions
OpenAndConfSSDPNotifySocket and OpenAndConfSSDPNotifySocketIPV6
This commit is contained in:
Thomas Bernard 2014-10-22 11:43:42 +02:00
parent 50e370abcd
commit 9194b02071
1 changed files with 9 additions and 0 deletions
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9
miniupnpd/minissdp.c
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@ -241,6 +241,10 @@ OpenAndConfSSDPNotifySocket(in_addr_t addr)
return -1;
}
/* bind() socket before using sendto() is not mandatory
* (sendto() will implicitly bind the socket when called on
* an unbound socket)
* here it is used to se a specific sending address */
memset(&sockname, 0, sizeof(struct sockaddr_in));
sockname.sin_family = AF_INET;
sockname.sin_addr.s_addr = addr; /*inet_addr(addr);*/
@ -284,9 +288,14 @@ OpenAndConfSSDPNotifySocketIPv6(unsigned int if_index)
return -1;
}
/* bind() socket before using sendto() is not mandatory
* (sendto() will implicitly bind the socket when called on
* an unbound socket)
* but explicit bind permits to set port/scope_id/etc. */
memset(&sockname, 0, sizeof(sockname));
sockname.sin6_family = AF_INET6;
sockname.sin6_addr = in6addr_any;
/*sockname.sin6_port = htons(port);*/
/*sockname.sin6_scope_id = if_index;*/
if(bind(s, (struct sockaddr *)&sockname, sizeof(sockname)) < 0)
{