add "wpad" DHCP option. Spotted some optimization opportunities: -80 bytes
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@ -95,7 +95,8 @@ struct option_set *find_option(struct option_set *opt_list, char code)
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/* add an option to the opt_list */
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/* add an option to the opt_list */
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static void attach_option(struct option_set **opt_list, struct dhcp_option *option, char *buffer, int length)
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static void attach_option(struct option_set **opt_list,
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const struct dhcp_option *option, char *buffer, int length)
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{
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{
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struct option_set *existing, *new, **curr;
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struct option_set *existing, *new, **curr;
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@ -135,7 +136,7 @@ static int read_opt(const char *const_line, void *arg)
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{
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{
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struct option_set **opt_list = arg;
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struct option_set **opt_list = arg;
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char *opt, *val, *endptr;
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char *opt, *val, *endptr;
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struct dhcp_option *option;
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const struct dhcp_option *option;
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int retval = 0, length;
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int retval = 0, length;
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char buffer[8];
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char buffer[8];
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char *line;
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char *line;
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@ -144,16 +145,21 @@ static int read_opt(const char *const_line, void *arg)
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/* Cheat, the only const line we'll actually get is "" */
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/* Cheat, the only const line we'll actually get is "" */
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line = (char *) const_line;
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line = (char *) const_line;
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if (!(opt = strtok(line, " \t="))) return 0;
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opt = strtok(line, " \t=");
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if (!opt) return 0;
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for (option = dhcp_options; option->code; option++)
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option = dhcp_options;
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while (1) {
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if (!option->code)
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return 0;
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if (!strcasecmp(option->name, opt))
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if (!strcasecmp(option->name, opt))
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break;
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break;
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option++;
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if (!option->code) return 0;
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}
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do {
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do {
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if (!(val = strtok(NULL, ", \t"))) break;
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val = strtok(NULL, ", \t");
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if (!val) break;
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length = option_lengths[option->flags & TYPE_MASK];
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length = option_lengths[option->flags & TYPE_MASK];
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retval = 0;
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retval = 0;
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opt = buffer; /* new meaning for variable opt */
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opt = buffer; /* new meaning for variable opt */
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@ -10,53 +10,55 @@
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/* supported options are easily added here */
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/* supported options are easily added here */
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struct dhcp_option dhcp_options[] = {
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const struct dhcp_option dhcp_options[] = {
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/* name[10] flags code */
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/* name[10] flags code */
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{"subnet", OPTION_IP | OPTION_REQ, 0x01},
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{"subnet", OPTION_IP | OPTION_REQ, 0x01},
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{"timezone", OPTION_S32, 0x02},
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{"timezone", OPTION_S32, 0x02},
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{"router", OPTION_IP | OPTION_LIST | OPTION_REQ, 0x03},
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{"router", OPTION_IP | OPTION_LIST | OPTION_REQ, 0x03},
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{"timesvr", OPTION_IP | OPTION_LIST, 0x04},
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{"timesvr", OPTION_IP | OPTION_LIST, 0x04},
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{"namesvr", OPTION_IP | OPTION_LIST, 0x05},
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{"namesvr", OPTION_IP | OPTION_LIST, 0x05},
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{"dns", OPTION_IP | OPTION_LIST | OPTION_REQ, 0x06},
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{"dns", OPTION_IP | OPTION_LIST | OPTION_REQ, 0x06},
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{"logsvr", OPTION_IP | OPTION_LIST, 0x07},
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{"logsvr", OPTION_IP | OPTION_LIST, 0x07},
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{"cookiesvr", OPTION_IP | OPTION_LIST, 0x08},
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{"cookiesvr", OPTION_IP | OPTION_LIST, 0x08},
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{"lprsvr", OPTION_IP | OPTION_LIST, 0x09},
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{"lprsvr", OPTION_IP | OPTION_LIST, 0x09},
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{"hostname", OPTION_STRING | OPTION_REQ, 0x0c},
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{"hostname", OPTION_STRING | OPTION_REQ, 0x0c},
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{"bootsize", OPTION_U16, 0x0d},
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{"bootsize", OPTION_U16, 0x0d},
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{"domain", OPTION_STRING | OPTION_REQ, 0x0f},
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{"domain", OPTION_STRING | OPTION_REQ, 0x0f},
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{"swapsvr", OPTION_IP, 0x10},
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{"swapsvr", OPTION_IP, 0x10},
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{"rootpath", OPTION_STRING, 0x11},
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{"rootpath", OPTION_STRING, 0x11},
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{"ipttl", OPTION_U8, 0x17},
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{"ipttl", OPTION_U8, 0x17},
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{"mtu", OPTION_U16, 0x1a},
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{"mtu", OPTION_U16, 0x1a},
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{"broadcast", OPTION_IP | OPTION_REQ, 0x1c},
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{"broadcast", OPTION_IP | OPTION_REQ, 0x1c},
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{"nisdomain", OPTION_STRING | OPTION_REQ, 0x28},
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{"nisdomain", OPTION_STRING | OPTION_REQ, 0x28},
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{"nissrv", OPTION_IP | OPTION_LIST | OPTION_REQ, 0x29},
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{"nissrv", OPTION_IP | OPTION_LIST | OPTION_REQ, 0x29},
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{"ntpsrv", OPTION_IP | OPTION_LIST | OPTION_REQ, 0x2a},
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{"ntpsrv", OPTION_IP | OPTION_LIST | OPTION_REQ, 0x2a},
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{"wins", OPTION_IP | OPTION_LIST, 0x2c},
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{"wins", OPTION_IP | OPTION_LIST, 0x2c},
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{"requestip", OPTION_IP, 0x32},
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{"requestip", OPTION_IP, 0x32},
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{"lease", OPTION_U32, 0x33},
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{"lease", OPTION_U32, 0x33},
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{"dhcptype", OPTION_U8, 0x35},
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{"dhcptype", OPTION_U8, 0x35},
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{"serverid", OPTION_IP, 0x36},
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{"serverid", OPTION_IP, 0x36},
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{"message", OPTION_STRING, 0x38},
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{"message", OPTION_STRING, 0x38},
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{"vendorclass", OPTION_STRING, 0x3C},
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{"vendorclass", OPTION_STRING, 0x3C},
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{"clientid", OPTION_STRING, 0x3D},
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{"clientid", OPTION_STRING, 0x3D},
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{"tftp", OPTION_STRING, 0x42},
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{"tftp", OPTION_STRING, 0x42},
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{"bootfile", OPTION_STRING, 0x43},
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{"bootfile", OPTION_STRING, 0x43},
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{"userclass", OPTION_STRING, 0x4D},
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{"userclass", OPTION_STRING, 0x4D},
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{"", 0x00, 0x00}
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/* MSIE's "Web Proxy Autodiscovery Protocol" support */
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{"wpad", OPTION_STRING, 0xfc},
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{"", 0x00, 0x00}
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};
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};
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/* Lengths of the different option types */
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/* Lengths of the different option types */
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int option_lengths[] = {
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const unsigned char option_lengths[] = {
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[OPTION_IP] = 4,
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[OPTION_IP] = 4,
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[OPTION_IP_PAIR] = 8,
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[OPTION_IP_PAIR] = 8,
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[OPTION_BOOLEAN] = 1,
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[OPTION_BOOLEAN] = 1,
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[OPTION_STRING] = 1,
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[OPTION_STRING] = 1,
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[OPTION_U8] = 1,
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[OPTION_U8] = 1,
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[OPTION_U16] = 2,
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[OPTION_U16] = 2,
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[OPTION_S16] = 2,
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[OPTION_S16] = 2,
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[OPTION_U32] = 4,
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[OPTION_U32] = 4,
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[OPTION_S32] = 4
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[OPTION_S32] = 4
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};
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};
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@ -150,9 +152,9 @@ int add_option_string(uint8_t *optionptr, uint8_t *string)
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/* add a one to four byte option to a packet */
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/* add a one to four byte option to a packet */
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int add_simple_option(uint8_t *optionptr, uint8_t code, uint32_t data)
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int add_simple_option(uint8_t *optionptr, uint8_t code, uint32_t data)
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{
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{
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struct dhcp_option *dh;
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const struct dhcp_option *dh;
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for (dh=dhcp_options; dh->code; dh++) {
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for (dh = dhcp_options; dh->code; dh++) {
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if (dh->code == code) {
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if (dh->code == code) {
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uint8_t option[6], len;
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uint8_t option[6], len;
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@ -26,8 +26,8 @@ struct dhcp_option {
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uint8_t code;
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uint8_t code;
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};
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};
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extern struct dhcp_option dhcp_options[];
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extern const struct dhcp_option dhcp_options[];
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extern int option_lengths[];
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extern const unsigned char option_lengths[];
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uint8_t *get_option(struct dhcpMessage *packet, int code);
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uint8_t *get_option(struct dhcpMessage *packet, int code);
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int end_option(uint8_t *optionptr);
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int end_option(uint8_t *optionptr);
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@ -54,7 +54,8 @@ static int mton(struct in_addr *mask)
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/* Fill dest with the text of option 'option'. */
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/* Fill dest with the text of option 'option'. */
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static void fill_options(char *dest, uint8_t *option, struct dhcp_option *type_p)
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static void fill_options(char *dest, uint8_t *option,
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const struct dhcp_option *type_p)
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{
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{
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int type, optlen;
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int type, optlen;
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uint16_t val_u16;
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uint16_t val_u16;
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@ -152,7 +153,8 @@ static char **fill_envp(struct dhcpMessage *packet)
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for (i = 0; dhcp_options[i].code; i++) {
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for (i = 0; dhcp_options[i].code; i++) {
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if (!(temp = get_option(packet, dhcp_options[i].code)))
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temp = get_option(packet, dhcp_options[i].code);
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if (temp)
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continue;
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continue;
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envp[j] = xmalloc(upper_length(temp[OPT_LEN - 2],
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envp[j] = xmalloc(upper_length(temp[OPT_LEN - 2],
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dhcp_options[i].flags & TYPE_MASK) + strlen(dhcp_options[i].name) + 2);
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dhcp_options[i].flags & TYPE_MASK) + strlen(dhcp_options[i].name) + 2);
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