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WebSVN – planix.SVN – Blame – /os/branches/feature_posix/sys/src/9/boot/bootip.c – Rev 2

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#include <u.h>
2 
#include <libc.h>
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#include <ip.h>
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#include "boot.h"
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7 
static	uchar	fsip[IPaddrlen];
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static	uchar	auip[IPaddrlen];
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static	char	mpoint[32];
10 
 
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static int isvalidip(uchar*);
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static void getndbvar(char *name, uchar *var, char *prompt);
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void
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configip(int bargc, char **bargv, int needfs)
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{
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	Waitmsg *w;
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	int argc, pid;
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	char **arg, **argv, *p;
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	fmtinstall('I', eipfmt);
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	fmtinstall('M', eipfmt);
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	fmtinstall('E', eipfmt);
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	arg = malloc((bargc+1) * sizeof(char*));
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	if(arg == nil)
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		fatal("malloc");
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	memmove(arg, bargv, bargc * sizeof(char*));
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	arg[bargc] = 0;
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	argc = bargc;
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	argv = arg;
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	strcpy(mpoint, "/net");
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	ARGBEGIN {
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	case 'x':
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		p = ARGF();
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		if(p != nil)
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			snprint(mpoint, sizeof(mpoint), "/net%s", p);
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		break;
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	case 'g':
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	case 'b':
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	case 'h':
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	case 'm':
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		p = ARGF();
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		USED(p);
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		break;
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	} ARGEND;
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	/* bind in an ip interface or two */
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	dprint("bind #I...");
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	if(bind("#I", mpoint, MAFTER) < 0)
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		fatal("bind #I");
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	dprint("bind #l0...");
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	if(access("#l0", 0) == 0 && bind("#l0", mpoint, MAFTER) < 0)
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		warning("bind #l0");
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	dprint("bind #l1...");
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	if(access("#l1", 0) == 0 && bind("#l1", mpoint, MAFTER) < 0)
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		warning("bind #l1");
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	dprint("bind #l2...");
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	if(access("#l2", 0) == 0 && bind("#l2", mpoint, MAFTER) < 0)
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		warning("bind #l2");
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	dprint("bind #l3...");
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	if(access("#l3", 0) == 0 && bind("#l3", mpoint, MAFTER) < 0)
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		warning("bind #l3");
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	werrstr("");
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	/* let ipconfig configure the first ip interface */
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	switch(pid = fork()){
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	case -1:
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		fatal("fork configuring ip: %r");
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	case 0:
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		dprint("starting ipconfig...");
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		exec("/boot/ipconfig", arg);
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		fatal("execing /boot/ipconfig: %r");
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	default:
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		break;
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	}
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79 
	/* wait for ipconfig to finish */
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	dprint("waiting for dhcp...");
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	for(;;){
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		w = wait();
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		if(w != nil && w->pid == pid){
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			if(w->msg[0] != 0)
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				fatal(w->msg);
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			free(w);
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			break;
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		} else if(w == nil)
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			fatal("configuring ip");
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		free(w);
91 
	}
92 
	dprint("\n");
93 
 
94 
	if(needfs) {  /* if we didn't get a file and auth server, query user */
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		getndbvar("fs", fsip, "filesystem IP address");
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		getndbvar("auth", auip, "authentication server IP address");
97 
	}
98 
}
99 
 
100 
static void
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setauthaddr(char *proto, int port)
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{
103 
	char buf[128];
104 
 
105 
	snprint(buf, sizeof buf, "%s!%I!%d", proto, auip, port);
106 
	authaddr = strdup(buf);
107 
}
108 
 
109 
void
110 
configtcp(Method*)
111 
{
112 
	dprint("configip...");
113 
	configip(bargc, bargv, 1);
114 
	dprint("setauthaddr...");
115 
	setauthaddr("tcp", 567);
116 
}
117 
 
118 
int
119 
connecttcp(void)
120 
{
121 
	int fd;
122 
	char buf[64];
123 
 
124 
	snprint(buf, sizeof buf, "tcp!%I!564", fsip);
125 
	dprint("dial %s...", buf);
126 
	fd = dial(buf, 0, 0, 0);
127 
	if (fd < 0)
128 
		werrstr("dial %s: %r", buf);
129 
	return fd;
130 
}
131 
 
132 
static int
133 
isvalidip(uchar *ip)
134 
{
135 
	if(ipcmp(ip, IPnoaddr) == 0)
136 
		return 0;
137 
	if(ipcmp(ip, v4prefix) == 0)
138 
		return 0;
139 
	return 1;
140 
}
141 
 
142 
static void
143 
netenv(char *attr, uchar *ip)
144 
{
145 
	int fd, n;
146 
	char buf[128];
147 
 
148 
	ipmove(ip, IPnoaddr);
149 
	snprint(buf, sizeof(buf), "#e/%s", attr);
150 
	fd = open(buf, OREAD);
151 
	if(fd < 0)
152 
		return;
153 
 
154 
	n = read(fd, buf, sizeof(buf)-1);
155 
	close(fd);
156 
	if(n <= 0)
157 
		return;
158 
	buf[n] = 0;
159 
	if (parseip(ip, buf) == -1)
160 
		fprint(2, "netenv: can't parse ip %s\n", buf);
161 
}
162 
 
163 
static void
164 
netndb(char *attr, uchar *ip)
165 
{
166 
	int fd, n, c;
167 
	char buf[1024];
168 
	char *p;
169 
 
170 
	ipmove(ip, IPnoaddr);
171 
	snprint(buf, sizeof(buf), "%s/ndb", mpoint);
172 
	fd = open(buf, OREAD);
173 
	if(fd < 0)
174 
		return;
175 
	n = read(fd, buf, sizeof(buf)-1);
176 
	close(fd);
177 
	if(n <= 0)
178 
		return;
179 
	buf[n] = 0;
180 
	n = strlen(attr);
181 
	for(p = buf; ; p++){
182 
		p = strstr(p, attr);
183 
		if(p == nil)
184 
			break;
185 
		c = *(p-1);
186 
		if(*(p + n) == '=' && (p == buf || c == '\n' || c == ' ' || c == '\t')){
187 
			p += n+1;
188 
			if (parseip(ip, p) == -1)
189 
				fprint(2, "netndb: can't parse ip %s\n", p);
190 
			return;
191 
		}
192 
	}
193 
}
194 
 
195 
static void
196 
getndbvar(char *name, uchar *var, char *prompt)
197 
{
198 
	char buf[64];
199 
 
200 
	netndb(name, var);
201 
	if(!isvalidip(var))
202 
		netenv(name, var);
203 
	while(!isvalidip(var)){
204 
		buf[0] = 0;
205 
		outin(prompt, buf, sizeof buf);
206 
		if (parseip(var, buf) == -1)
207 
			fprint(2, "configip: can't parse %s ip %s\n", name, buf);
208 
	}
209 
}