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Diffstat (limited to 'networking/udhcp/options.c')
-rw-r--r--networking/udhcp/options.c138
1 files changed, 92 insertions, 46 deletions
diff --git a/networking/udhcp/options.c b/networking/udhcp/options.c
index ffc0ed127..c224f3670 100644
--- a/networking/udhcp/options.c
+++ b/networking/udhcp/options.c
@@ -11,54 +11,97 @@
11 11
12/* Supported options are easily added here */ 12/* Supported options are easily added here */
13const struct dhcp_option dhcp_options[] = { 13const struct dhcp_option dhcp_options[] = {
14 /* opt_name[12] flags code */ 14 /* flags code */
15 {"subnet", OPTION_IP | OPTION_REQ, 0x01}, /* DHCP_SUBNET */ 15 { OPTION_IP | OPTION_REQ, 0x01 }, /* DHCP_SUBNET */
16 {"timezone", OPTION_S32, 0x02}, /* DHCP_TIME_OFFSET */ 16 { OPTION_S32, 0x02 }, /* DHCP_TIME_OFFSET */
17 {"router", OPTION_IP | OPTION_LIST | OPTION_REQ, 0x03}, /* DHCP_ROUTER */ 17 { OPTION_IP | OPTION_LIST | OPTION_REQ, 0x03 }, /* DHCP_ROUTER */
18 {"timesvr", OPTION_IP | OPTION_LIST, 0x04}, /* DHCP_TIME_SERVER */ 18 { OPTION_IP | OPTION_LIST, 0x04 }, /* DHCP_TIME_SERVER */
19 {"namesvr", OPTION_IP | OPTION_LIST, 0x05}, /* DHCP_NAME_SERVER */ 19 { OPTION_IP | OPTION_LIST, 0x05 }, /* DHCP_NAME_SERVER */
20 {"dns", OPTION_IP | OPTION_LIST | OPTION_REQ, 0x06}, /* DHCP_DNS_SERVER */ 20 { OPTION_IP | OPTION_LIST | OPTION_REQ, 0x06 }, /* DHCP_DNS_SERVER */
21 {"logsvr", OPTION_IP | OPTION_LIST, 0x07}, /* DHCP_LOG_SERVER */ 21 { OPTION_IP | OPTION_LIST, 0x07 }, /* DHCP_LOG_SERVER */
22 {"cookiesvr", OPTION_IP | OPTION_LIST, 0x08}, /* DHCP_COOKIE_SERVER */ 22 { OPTION_IP | OPTION_LIST, 0x08 }, /* DHCP_COOKIE_SERVER */
23 {"lprsvr", OPTION_IP | OPTION_LIST, 0x09}, /* DHCP_LPR_SERVER */ 23 { OPTION_IP | OPTION_LIST, 0x09 }, /* DHCP_LPR_SERVER */
24 {"hostname", OPTION_STRING | OPTION_REQ, 0x0c}, /* DHCP_HOST_NAME */ 24 { OPTION_STRING | OPTION_REQ, 0x0c }, /* DHCP_HOST_NAME */
25 {"bootsize", OPTION_U16, 0x0d}, /* DHCP_BOOT_SIZE */ 25 { OPTION_U16, 0x0d }, /* DHCP_BOOT_SIZE */
26 {"domain", OPTION_STRING | OPTION_LIST | OPTION_REQ, 0x0f}, /* DHCP_DOMAIN_NAME */ 26 { OPTION_STRING | OPTION_LIST | OPTION_REQ, 0x0f }, /* DHCP_DOMAIN_NAME */
27 {"swapsvr", OPTION_IP, 0x10}, /* DHCP_SWAP_SERVER */ 27 { OPTION_IP, 0x10 }, /* DHCP_SWAP_SERVER */
28 {"rootpath", OPTION_STRING, 0x11}, /* DHCP_ROOT_PATH */ 28 { OPTION_STRING, 0x11 }, /* DHCP_ROOT_PATH */
29 {"ipttl", OPTION_U8, 0x17}, /* DHCP_IP_TTL */ 29 { OPTION_U8, 0x17 }, /* DHCP_IP_TTL */
30 {"mtu", OPTION_U16, 0x1a}, /* DHCP_MTU */ 30 { OPTION_U16, 0x1a }, /* DHCP_MTU */
31 {"broadcast", OPTION_IP | OPTION_REQ, 0x1c}, /* DHCP_BROADCAST */ 31 { OPTION_IP | OPTION_REQ, 0x1c }, /* DHCP_BROADCAST */
32 {"nisdomain", OPTION_STRING | OPTION_REQ, 0x28}, /* DHCP_NTP_SERVER */ 32 { OPTION_STRING | OPTION_REQ, 0x28 }, /* DHCP_NTP_SERVER */
33 {"nissrv", OPTION_IP | OPTION_LIST | OPTION_REQ, 0x29}, /* DHCP_WINS_SERVER */ 33 { OPTION_IP | OPTION_LIST | OPTION_REQ, 0x29 }, /* DHCP_WINS_SERVER */
34 {"ntpsrv", OPTION_IP | OPTION_LIST | OPTION_REQ, 0x2a}, /* DHCP_REQUESTED_IP */ 34 { OPTION_IP | OPTION_LIST | OPTION_REQ, 0x2a }, /* DHCP_REQUESTED_IP */
35 {"wins", OPTION_IP | OPTION_LIST, 0x2c}, /* DHCP_LEASE_TIME */ 35 { OPTION_IP | OPTION_LIST, 0x2c }, /* DHCP_LEASE_TIME */
36 {"requestip", OPTION_IP, 0x32}, /* DHCP_OPTION_OVER */ 36 { OPTION_IP, 0x32 }, /* DHCP_OPTION_OVER */
37 {"lease", OPTION_U32, 0x33}, /* DHCP_MESSAGE_TYPE */ 37 { OPTION_U32, 0x33 }, /* DHCP_MESSAGE_TYPE */
38 {"dhcptype", OPTION_U8, 0x35}, /* DHCP_SERVER_ID */ 38 { OPTION_U8, 0x35 }, /* DHCP_SERVER_ID */
39 {"serverid", OPTION_IP, 0x36}, /* DHCP_PARAM_REQ */ 39 { OPTION_IP, 0x36 }, /* DHCP_PARAM_REQ */
40 {"message", OPTION_STRING, 0x38}, /* DHCP_MESSAGE */ 40 { OPTION_STRING, 0x38 }, /* DHCP_MESSAGE */
41// TODO: 1) some options should not be parsed & passed to script - 41 { OPTION_STRING, 0x3C }, /* DHCP_VENDOR */
42// maxsize sure should not, since it cannot appear in server responses! 42 { OPTION_STRING, 0x3D }, /* DHCP_CLIENT_ID */
43// grep for opt_name is fix the mess. 43 { OPTION_STRING, 0x42 }, /* "tftp" */
44// 2) Using fixed-sized char[] vector wastes space. 44 { OPTION_STRING, 0x43 }, /* "bootfile" */
45 {"maxsize", OPTION_U16, 0x39}, /* DHCP_MAX_SIZE */ 45 { OPTION_STRING, 0x4D }, /* "userclass" */
46 {"vendorclass", OPTION_STRING, 0x3C}, /* DHCP_VENDOR */
47 {"clientid", OPTION_STRING, 0x3D}, /* DHCP_CLIENT_ID */
48 {"tftp", OPTION_STRING, 0x42},
49 {"bootfile", OPTION_STRING, 0x43},
50 {"userclass", OPTION_STRING, 0x4D},
51#if ENABLE_FEATURE_RFC3397 46#if ENABLE_FEATURE_RFC3397
52 {"search", OPTION_STR1035 | OPTION_LIST | OPTION_REQ, 0x77}, 47 { OPTION_STR1035 | OPTION_LIST | OPTION_REQ, 0x77 }, /* "search" */
53#endif 48#endif
54 /* MSIE's "Web Proxy Autodiscovery Protocol" support */ 49 /* MSIE's "Web Proxy Autodiscovery Protocol" support */
55 {"wpad", OPTION_STRING, 0xfc}, 50 { OPTION_STRING, 0xfc }, /* "wpad" */
56 {} /* zero-padded terminating entry */ 51
52 /* Options below have no match in dhcp_option_strings[],
53 * are not passed to dhcpc scripts, and cannot be specified
54 * with "option XXX YYY" syntax in dhcpd config file. */
55
56 { OPTION_U16, 0x39 }, /* DHCP_MAX_SIZE */
57 { } /* zeroed terminating entry */
57}; 58};
58 59
60/* Used for converting options from incoming packets to env variables
61 * for udhcpc stript */
62/* Must match dhcp_options[] order */
63const char dhcp_option_strings[] ALIGN1 =
64 "subnet" "\0" /* DHCP_SUBNET */
65 "timezone" "\0" /* DHCP_TIME_OFFSET */
66 "router" "\0" /* DHCP_ROUTER */
67 "timesvr" "\0" /* DHCP_TIME_SERVER */
68 "namesvr" "\0" /* DHCP_NAME_SERVER */
69 "dns" "\0" /* DHCP_DNS_SERVER */
70 "logsvr" "\0" /* DHCP_LOG_SERVER */
71 "cookiesvr" "\0" /* DHCP_COOKIE_SERVER */
72 "lprsvr" "\0" /* DHCP_LPR_SERVER */
73 "hostname" "\0" /* DHCP_HOST_NAME */
74 "bootsize" "\0" /* DHCP_BOOT_SIZE */
75 "domain" "\0" /* DHCP_DOMAIN_NAME */
76 "swapsvr" "\0" /* DHCP_SWAP_SERVER */
77 "rootpath" "\0" /* DHCP_ROOT_PATH */
78 "ipttl" "\0" /* DHCP_IP_TTL */
79 "mtu" "\0" /* DHCP_MTU */
80 "broadcast" "\0" /* DHCP_BROADCAST */
81 "nisdomain" "\0" /* DHCP_NTP_SERVER */
82 "nissrv" "\0" /* DHCP_WINS_SERVER */
83 "ntpsrv" "\0" /* DHCP_REQUESTED_IP */
84 "wins" "\0" /* DHCP_LEASE_TIME */
85 "requestip" "\0" /* DHCP_OPTION_OVER */
86 "lease" "\0" /* DHCP_MESSAGE_TYPE */
87 "dhcptype" "\0" /* DHCP_SERVER_ID */
88 "serverid" "\0" /* DHCP_PARAM_REQ */
89 "message" "\0" /* DHCP_MESSAGE */
90 "vendorclass" "\0" /* DHCP_VENDOR */
91 "clientid" "\0" /* DHCP_CLIENT_ID */
92 "tftp" "\0"
93 "bootfile" "\0"
94 "userclass" "\0"
95#if ENABLE_FEATURE_RFC3397
96 "search" "\0"
97#endif
98 /* MSIE's "Web Proxy Autodiscovery Protocol" support */
99 "wpad" "\0"
100 ;
101
59 102
60/* Lengths of the different option types */ 103/* Lengths of the different option types */
61const unsigned char option_lengths[] ALIGN1 = { 104const uint8_t dhcp_option_lengths[] ALIGN1 = {
62 [OPTION_IP] = 4, 105 [OPTION_IP] = 4,
63 [OPTION_IP_PAIR] = 8, 106 [OPTION_IP_PAIR] = 8,
64 [OPTION_BOOLEAN] = 1, 107 [OPTION_BOOLEAN] = 1,
@@ -137,8 +180,10 @@ int end_option(uint8_t *optionptr)
137 int i = 0; 180 int i = 0;
138 181
139 while (optionptr[i] != DHCP_END) { 182 while (optionptr[i] != DHCP_END) {
140 if (optionptr[i] == DHCP_PADDING) i++; 183 if (optionptr[i] == DHCP_PADDING)
141 else i += optionptr[i + OPT_LEN] + 2; 184 i++;
185 else
186 i += optionptr[i + OPT_LEN] + 2;
142 } 187 }
143 return i; 188 return i;
144} 189}
@@ -173,10 +218,11 @@ int add_simple_option(uint8_t *optionptr, uint8_t code, uint32_t data)
173 uint8_t option[6], len; 218 uint8_t option[6], len;
174 219
175 option[OPT_CODE] = code; 220 option[OPT_CODE] = code;
176 len = option_lengths[dh->flags & TYPE_MASK]; 221 len = dhcp_option_lengths[dh->flags & TYPE_MASK];
177 option[OPT_LEN] = len; 222 option[OPT_LEN] = len;
178 if (BB_BIG_ENDIAN) data <<= 8 * (4 - len); 223 if (BB_BIG_ENDIAN)
179 /* This memcpy is for broken processors which can't 224 data <<= 8 * (4 - len);
225 /* This memcpy is for processors which can't
180 * handle a simple unaligned 32-bit assignment */ 226 * handle a simple unaligned 32-bit assignment */
181 memcpy(&option[OPT_DATA], &data, 4); 227 memcpy(&option[OPT_DATA], &data, 4);
182 return add_option_string(optionptr, option); 228 return add_option_string(optionptr, option);
generated by cgit v1.2.3-55-g6feb (git 2.39.1) at 2025-08-15 06:12:42 +0000