Messages in this thread | | | Date | Tue, 26 Jun 2001 15:00:58 -0700 | From | Ben Greear <> | Subject | Does select (for write) work on PACKET_SOCKETs ? |
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It does not seem to work for me like I want it to. Basically, it seems that it always takes the entire timeout (50-80 ms in my case), but at least the socket descriptor is SET when select returns. I want it to return as soon as the socket is writable, which at low (56kbps) speed on a 100bt NIC should be immediate, or certainly less than 50ms.
I'm using kernel 2.4.6-pre3 with RH 7.1.
Here is a snippet of code that does the socket creation (I am binding in this case.):
int createPacketSocket(const char* dev_name, int ether_type, int dev_idx, int should_bind) { LF_TRC_IN; VLOG << "dev_name -:" << dev_name << ":- dev_idx: " << dev_idx << " type (decimal): " << ether_type << endl;
int s = socket(PF_PACKET, SOCK_RAW, htons(ether_type)); int r; //retval
if (s < 0) { cerr << "ERROR: socket: " << strerror(errno) << endl; VLOG << "ERROR: socket: " << strerror(errno) << endl; return s; }
if (should_bind) { struct sockaddr_ll myaddr;
memset(&myaddr, '\0', sizeof(myaddr)); myaddr.sll_family = AF_PACKET; myaddr.sll_protocol = htons(ether_type); myaddr.sll_ifindex = dev_idx; //strcpy(myaddr.sa_data, dev_name); r = bind(s, (struct sockaddr*)(&myaddr), sizeof(myaddr)); if (r < 0) { cerr << "ERROR: bind: " << strerror(errno) << endl; VLOG << "ERROR: bind: " << strerror(errno) << endl; return r; } }
nonblock(s); return s; }
Any ideas?
Thanks, Ben
-- Ben Greear <greearb@candelatech.com> <Ben_Greear@excite.com> President of Candela Technologies Inc http://www.candelatech.com ScryMUD: http://scry.wanfear.com http://scry.wanfear.com/~greear - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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