Date: Wed, 09 Dec 1998 13:40:18 +0100 From: Nguyen Tuan Hung <tmphung@lt.eth.ericsson.se> To: freebsd-questions@FreeBSD.ORG Subject: [Fwd: Configuring FreeBSD kernel.] Message-ID: <366E6FB2.47882AEF@lt.eth.ericsson.se>
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Hi!
I'm reading the /sys/netinet/ip_input.c file the ip_init() menthod,
you wrote "
/*****************************************************/
/*
* IP initialition. Fill in IP protocol switch table
*If all protocols not implemented go to raw IP protocol handler
*/
/******************************************************/
1. This means, if I remove tcp_init(), and udp_init() from (struct
protosw) inetsw[] array (instead NULL), the kernel will pass tcp (or
udp) packet to my open raw socket?
2. What happen with icmp, and iqmp protocols. They work correctly.
3. If I exchange only tcp_init to NULL, where will the kernel pass
incoming udp packet to my raw socket, or kernel handle it.
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Message-ID: <366E40E8.EDDD3B69@lt.eth.ericsson.se>
Date: Wed, 09 Dec 1998 10:20:40 +0100
From: Nguyen Tuan Hung <tmphung@lt.eth.ericsson.se>
X-Mailer: Mozilla 4.07 [en] (X11; I; SunOS 5.6 sun4u)
MIME-Version: 1.0
To: freebsd-questions@FreeBSD.ORG
Subject: Configuring FreeBSD kernel.
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Hi!
I'm reading the /sys/netinet/ip_input.c file the ip_init() menthod,
you wrote "
/*****************************************************/
/*
* IP initialition. Fill in IP protocol switch table
*If all protocols not implemented go to raw IP protocol handler
*/
/******************************************************/
What does mean this?
How do I do it. What need I do in kernel, I don't want use kernel's TCP
protocol instead my written NEW_TCP protocol.
Example I like to write deamon program that open SOCK_RAW socket, and
know receive incoming TCP packet (whithout Berkeley packet filter)
The source code:
/* server.c */
int fd;
fd = socket (AF_INET, SOCK_RAW,IPPROTO_TCP);
.
.
.
while(1) {
recvfrom(fd,buf, len,0, NULL,NULL);
fprintf(stderr, "coming dat a%s \n",buf);
}
close(fd);
/*end server.c */
/* client.c */
int fd
fd = socket(AF_INET, SOCK_STREAM, 0);
.
.
.
.
send(fd,buf, len);
close(fd);
/*end client.c */
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