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Make PXE do a dhcp request to find out where its files are. The

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DHCP server is no longer required to also act as the NFS/TFTP
server.
This commit is contained in:
Paul Saab 2000-04-27 12:30:28 +00:00
parent 6e124cb076
commit f14ad6978f
1 changed files with 36 additions and 15 deletions
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51
sys/boot/i386/libi386/pxe.c
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@ -241,17 +241,6 @@ pxe_init(void)
}
bcopy(PTOV((gci_p->Buffer.segment << 4) + gci_p->Buffer.offset),
&bootplayer, gci_p->BufferSize);
/*
* XXX - This is a major cop out. We should request this
* from DHCP, but we can't do that until we have full UNDI
* support.
*
* Also set the nfs server's IP.
*/
strcpy(rootpath, PXENFSROOTPATH);
rootip.s_addr = bootplayer.sip;
return (1);
}
@ -268,8 +257,10 @@ pxe_open(struct open_file *f, ...)
{
va_list args;
char *devname; /* Device part of file name (or NULL). */
char temp[FNAME_SIZE];
int error = 0;
int i;
va_start(args, f);
devname = va_arg(args, char*);
va_end(args);
@ -286,6 +277,31 @@ pxe_open(struct open_file *f, ...)
if (debug)
printf("pxe_open: netif_open() succeeded\n");
}
if (rootip.s_addr == 0) {
/*
* Do a bootp/dhcp request to find out where our
* NFS/TFTP server is. Even if we dont get back
* the proper information, fall back to the server
* which brought us to life and a default rootpath.
*/
bootp(pxe_sock);
if (rootip.s_addr == 0) {
rootip.s_addr = bootplayer.sip;
strcpy(rootpath, PXENFSROOTPATH);
}
for(i=0; i<FNAME_SIZE; i++)
if(rootpath[i] == ':')
break;
if(i && i != FNAME_SIZE) {
i++;
bcopy(&rootpath[i], &temp[0], strlen(&rootpath[i])+1);
bcopy(&temp[0], &rootpath[0], strlen(&rootpath[i])+1);
}
printf("pxe_open: server addr: %s\n", inet_ntoa(rootip));
printf("pxe_open: server path: %s\n", rootpath);
printf("pxe_open: gateway ip: %s\n", inet_ntoa(gateip));
}
}
pxe_opens++;
f->f_devdata = &pxe_sock;
@ -310,7 +326,7 @@ pxe_close(struct open_file *f)
/* Not last close? */
if (pxe_opens > 0)
return(0);
rootip.s_addr = 0;
if (pxe_sock >= 0) {
#ifdef PXE_DEBUG
if (debug)
@ -462,6 +478,10 @@ pxe_netif_end(struct netif *nif)
static void
pxe_netif_init(struct iodesc *desc, void *machdep_hint)
{
int i;
for (i = 0; i < 6; ++i)
desc->myea[i] = bootplayer.CAddr[i];
desc->xid = bootplayer.ident;
}
static int
@ -482,9 +502,10 @@ sendudp(struct iodesc *h, void *pkt, size_t len)
t_PXENV_UDP_WRITE *udpwrite_p = (t_PXENV_UDP_WRITE *)scratch_buffer;
bzero(udpwrite_p, sizeof(*udpwrite_p));
udpwrite_p->ip = bootplayer.sip;
udpwrite_p->ip = h->destip.s_addr;
udpwrite_p->dst_port = h->destport;
udpwrite_p->src_port = h->myport;
udpwrite_p->gw = gateip.s_addr;
udpwrite_p->buffer_size = len;
udpwrite_p->buffer.segment = VTOPSEG(pkt);
udpwrite_p->buffer.offset = VTOPOFF(pkt);
@ -513,7 +534,7 @@ readudp(struct iodesc *h, void *pkt, size_t len, time_t timeout)
uh = (struct udphdr *) pkt - 1;
bzero(udpread_p, sizeof(*udpread_p));
udpread_p->dest_ip = bootplayer.yip;
udpread_p->dest_ip = h->myip.s_addr;
udpread_p->d_port = h->myport;
udpread_p->buffer_size = len;
udpread_p->buffer.segment = VTOPSEG(data_buffer);