udhcp: merge options.h into common.h, script.c into dhcpc.c

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

1 files changed, 0 insertions, 283 deletions

diff --git a/networking/udhcp/script.c b/networking/udhcp/script.c
deleted file mode 100644
index 400fd2b..0000000
--- a/networking/udhcp/script.c
+++ /dev/null
@@ -1,283 +0,0 @@
-/* vi: set sw=4 ts=4: */
-/* script.c
- *
- * Functions to call the DHCP client notification scripts
- *
- * Russ Dill <Russ.Dill@asu.edu> July 2001
- *
- * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
- */
-
-#include "common.h"
-#include "dhcpc.h"
-#include "options.h"
-
-
-/* get a rough idea of how long an option will be (rounding up...) */
-static const uint8_t len_of_option_as_string[] = {
-	[OPTION_IP] =		sizeof("255.255.255.255 "),
-	[OPTION_IP_PAIR] =	sizeof("255.255.255.255 ") * 2,
-	[OPTION_STATIC_ROUTES]= sizeof("255.255.255.255/32 255.255.255.255 "),
-	[OPTION_STRING] =	1,
-#if ENABLE_FEATURE_UDHCP_RFC3397
-	[OPTION_STR1035] =	1,
-#endif
-	[OPTION_BOOLEAN] =	sizeof("yes "),
-	[OPTION_U8] =		sizeof("255 "),
-	[OPTION_U16] =		sizeof("65535 "),
-	[OPTION_S16] =		sizeof("-32768 "),
-	[OPTION_U32] =		sizeof("4294967295 "),
-	[OPTION_S32] =		sizeof("-2147483684 "),
-};
-
-
-/* note: ip is a pointer to an IP in network order, possibly misaliged */
-static int sprint_nip(char *dest, const char *pre, const uint8_t *ip)
-{
-	return sprintf(dest, "%s%u.%u.%u.%u", pre, ip[0], ip[1], ip[2], ip[3]);
-}
-
-
-/* really simple implementation, just count the bits */
-static int mton(uint32_t mask)
-{
-	int i = 0;
-	mask = ntohl(mask); /* 111110000-like bit pattern */
-	while (mask) {
-		i++;
-		mask <<= 1;
-	}
-	return i;
-}
-
-
-/* Create "opt_name=opt_value" string */
-static NOINLINE char *xmalloc_optname_optval(uint8_t *option, const struct dhcp_option *type_p, const char *opt_name)
-{
-	unsigned upper_length;
-	int len, type, optlen;
-	uint16_t val_u16;
-	int16_t val_s16;
-	uint32_t val_u32;
-	int32_t val_s32;
-	char *dest, *ret;
-
-	/* option points to OPT_DATA, need to go back and get OPT_LEN */
-	len = option[OPT_LEN - OPT_DATA];
-	type = type_p->flags & OPTION_TYPE_MASK;
-	optlen = dhcp_option_lengths[type];
-	upper_length = len_of_option_as_string[type] * (len / optlen);
-
-	dest = ret = xmalloc(upper_length + strlen(opt_name) + 2);
-	dest += sprintf(ret, "%s=", opt_name);
-
-	while (len >= optlen) {
-		switch (type) {
-		case OPTION_IP_PAIR:
-			dest += sprint_nip(dest, "", option);
-			*dest++ = '/';
-			option += 4;
-			optlen = 4;
-		case OPTION_IP:
-			dest += sprint_nip(dest, "", option);
-// TODO: it can be a list only if (type_p->flags & OPTION_LIST).
-// Should we bail out/warn if we see multi-ip option which is
-// not allowed to be such? For example, DHCP_BROADCAST...
-			break;
-		case OPTION_BOOLEAN:
-			dest += sprintf(dest, *option ? "yes" : "no");
-			break;
-		case OPTION_U8:
-			dest += sprintf(dest, "%u", *option);
-			break;
-		case OPTION_U16:
-			move_from_unaligned16(val_u16, option);
-			dest += sprintf(dest, "%u", ntohs(val_u16));
-			break;
-		case OPTION_S16:
-			move_from_unaligned16(val_s16, option);
-			dest += sprintf(dest, "%d", ntohs(val_s16));
-			break;
-		case OPTION_U32:
-			move_from_unaligned32(val_u32, option);
-			dest += sprintf(dest, "%lu", (unsigned long) ntohl(val_u32));
-			break;
-		case OPTION_S32:
-			move_from_unaligned32(val_s32, option);
-			dest += sprintf(dest, "%ld", (long) ntohl(val_s32));
-			break;
-		case OPTION_STRING:
-			memcpy(dest, option, len);
-			dest[len] = '\0';
-			return ret;	 /* Short circuit this case */
-		case OPTION_STATIC_ROUTES: {
-			/* Option binary format:
-			 * mask [one byte, 0..32]
-			 * ip [big endian, 0..4 bytes depending on mask]
-			 * router [big endian, 4 bytes]
-			 * may be repeated
-			 *
-			 * We convert it to a string "IP/MASK ROUTER IP2/MASK2 ROUTER2"
-			 */
-			const char *pfx = "";
-
-			while (len >= 1 + 4) { /* mask + 0-byte ip + router */
-				uint32_t nip;
-				uint8_t *p;
-				unsigned mask;
-				int bytes;
-
-				mask = *option++;
-				if (mask > 32)
-					break;
-				len--;
-
-				nip = 0;
-				p = (void*) &nip;
-				bytes = (mask + 7) / 8; /* 0 -> 0, 1..8 -> 1, 9..16 -> 2 etc */
-				while (--bytes >= 0) {
-					*p++ = *option++;
-					len--;
-				}
-				if (len < 4)
-					break;
-
-				/* print ip/mask */
-				dest += sprint_nip(dest, pfx, (void*) &nip);
-				pfx = " ";
-				dest += sprintf(dest, "/%u ", mask);
-				/* print router */
-				dest += sprint_nip(dest, "", option);
-				option += 4;
-				len -= 4;
-			}
-
-			return ret;
-		}
-#if ENABLE_FEATURE_UDHCP_RFC3397
-		case OPTION_STR1035:
-			/* unpack option into dest; use ret for prefix (i.e., "optname=") */
-			dest = dname_dec(option, len, ret);
-			if (dest) {
-				free(ret);
-				return dest;
-			}
-			/* error. return "optname=" string */
-			return ret;
-#endif
-		}
-		option += optlen;
-		len -= optlen;
-		if (len <= 0)
-			break;
-		*dest++ = ' ';
-		*dest = '\0';
-	}
-	return ret;
-}
-
-
-/* put all the parameters into the environment */
-static char **fill_envp(struct dhcp_packet *packet)
-{
-	int num_options = 0;
-	int i;
-	char **envp, **curr;
-	const char *opt_name;
-	uint8_t *temp;
-	uint8_t over = 0;
-
-	if (packet) {
-		for (i = 0; dhcp_options[i].code; i++) {
-			if (get_option(packet, dhcp_options[i].code)) {
-				num_options++;
-				if (dhcp_options[i].code == DHCP_SUBNET)
-					num_options++; /* for mton */
-			}
-		}
-		if (packet->siaddr_nip)
-			num_options++;
-		temp = get_option(packet, DHCP_OPTION_OVERLOAD);
-		if (temp)
-			over = *temp;
-		if (!(over & FILE_FIELD) && packet->file[0])
-			num_options++;
-		if (!(over & SNAME_FIELD) && packet->sname[0])
-			num_options++;
-	}
-
-	curr = envp = xzalloc(sizeof(char *) * (num_options + 3));
-	*curr = xasprintf("interface=%s", client_config.interface);
-	putenv(*curr++);
-
-	if (packet == NULL)
-		return envp;
-
-	*curr = xmalloc(sizeof("ip=255.255.255.255"));
-	sprint_nip(*curr, "ip=", (uint8_t *) &packet->yiaddr);
-	putenv(*curr++);
-
-	opt_name = dhcp_option_strings;
-	i = 0;
-	while (*opt_name) {
-		temp = get_option(packet, dhcp_options[i].code);
-		if (!temp)
-			goto next;
-		*curr = xmalloc_optname_optval(temp, &dhcp_options[i], opt_name);
-		putenv(*curr++);
-
-		/* Fill in a subnet bits option for things like /24 */
-		if (dhcp_options[i].code == DHCP_SUBNET) {
-			uint32_t subnet;
-			move_from_unaligned32(subnet, temp);
-			*curr = xasprintf("mask=%d", mton(subnet));
-			putenv(*curr++);
-		}
- next:
-		opt_name += strlen(opt_name) + 1;
-		i++;
-	}
-	if (packet->siaddr_nip) {
-		*curr = xmalloc(sizeof("siaddr=255.255.255.255"));
-		sprint_nip(*curr, "siaddr=", (uint8_t *) &packet->siaddr_nip);
-		putenv(*curr++);
-	}
-	if (!(over & FILE_FIELD) && packet->file[0]) {
-		/* watch out for invalid packets */
-		*curr = xasprintf("boot_file=%."DHCP_PKT_FILE_LEN_STR"s", packet->file);
-		putenv(*curr++);
-	}
-	if (!(over & SNAME_FIELD) && packet->sname[0]) {
-		/* watch out for invalid packets */
-		*curr = xasprintf("sname=%."DHCP_PKT_SNAME_LEN_STR"s", packet->sname);
-		putenv(*curr++);
-	}
-	return envp;
-}
-
-
-/* Call a script with a par file and env vars */
-void FAST_FUNC udhcp_run_script(struct dhcp_packet *packet, const char *name)
-{
-	char **envp, **curr;
-	char *argv[3];
-
-	if (client_config.script == NULL)
-		return;
-
-	envp = fill_envp(packet);
-
-	/* call script */
-	log1("Executing %s %s", client_config.script, name);
-	argv[0] = (char*) client_config.script;
-	argv[1] = (char*) name;
-	argv[2] = NULL;
-	spawn_and_wait(argv);
-
-	for (curr = envp; *curr; curr++) {
-		log2(" %s", *curr);
-		bb_unsetenv(*curr);
-		free(*curr);
-	}
-	free(envp);
-}