diff options
| -rw-r--r-- | networking/udhcp/common.c | 26 | ||||
| -rw-r--r-- | networking/udhcp/common.h | 2 | ||||
| -rw-r--r-- | networking/udhcp/dhcpc.c | 10 |
3 files changed, 26 insertions, 12 deletions
diff --git a/networking/udhcp/common.c b/networking/udhcp/common.c index 9316774ff..6e8ec3e64 100644 --- a/networking/udhcp/common.c +++ b/networking/udhcp/common.c @@ -146,6 +146,25 @@ static void log_option(const char *pfx, const uint8_t *opt) # define log_option(pfx, opt) ((void)0) #endif +unsigned FAST_FUNC udhcp_option_idx(const char *name) +{ + int n = index_in_strings(dhcp_option_strings, name); + if (n >= 0) + return n; + + { + char buf[sizeof(dhcp_option_strings)]; + char *d = buf; + const char *s = dhcp_option_strings; + while (s < dhcp_option_strings + sizeof(dhcp_option_strings) - 2) { + *d++ = (*s == '\0' ? ' ' : *s); + s++; + } + *d = '\0'; + bb_error_msg_and_die("unknown option '%s', known options: %s", name, buf); + } +} + /* get an option with bounds checking (warning, result is not aligned). */ uint8_t* FAST_FUNC udhcp_get_option(struct dhcp_packet *packet, int code) { @@ -372,7 +391,7 @@ int FAST_FUNC udhcp_str2optset(const char *const_str, void *arg) char *opt, *val, *endptr; char *str; const struct dhcp_option *option; - int retval, length, idx; + int retval, length; char buffer[8] ALIGNED(4); uint16_t *result_u16 = (uint16_t *) buffer; uint32_t *result_u32 = (uint32_t *) buffer; @@ -383,10 +402,7 @@ int FAST_FUNC udhcp_str2optset(const char *const_str, void *arg) if (!opt) return 0; - idx = index_in_strings(dhcp_option_strings, opt); /* NB: was strcasecmp! */ - if (idx < 0) - return 0; - option = &dhcp_options[idx]; + option = &dhcp_options[udhcp_option_idx(opt)]; retval = 0; do { diff --git a/networking/udhcp/common.h b/networking/udhcp/common.h index b4e8b5d43..1c5afa6f9 100644 --- a/networking/udhcp/common.h +++ b/networking/udhcp/common.h @@ -169,6 +169,8 @@ extern const struct dhcp_option dhcp_options[]; extern const char dhcp_option_strings[]; extern const uint8_t dhcp_option_lengths[]; +unsigned FAST_FUNC udhcp_option_idx(const char *name); + uint8_t *udhcp_get_option(struct dhcp_packet *packet, int code) FAST_FUNC; int udhcp_end_option(uint8_t *optionptr) FAST_FUNC; void udhcp_add_binary_option(struct dhcp_packet *packet, uint8_t *addopt) FAST_FUNC; diff --git a/networking/udhcp/dhcpc.c b/networking/udhcp/dhcpc.c index 478ca5c21..c36d4180b 100644 --- a/networking/udhcp/dhcpc.c +++ b/networking/udhcp/dhcpc.c @@ -879,21 +879,17 @@ int udhcpc_main(int argc UNUSED_PARAM, char **argv) client_config.no_default_options = 1; while (list_O) { char *optstr = llist_pop(&list_O); - int n = index_in_strings(dhcp_option_strings, optstr); - if (n < 0) - bb_error_msg_and_die("unknown option '%s'", optstr); + unsigned n = udhcp_option_idx(optstr); n = dhcp_options[n].code; client_config.opt_mask[n >> 3] |= 1 << (n & 7); } while (list_x) { - int n; + unsigned n; char *optstr = llist_pop(&list_x); char *colon = strchr(optstr, ':'); if (colon) *colon = '\0'; - n = index_in_strings(dhcp_option_strings, optstr); - if (n < 0) - bb_error_msg_and_die("unknown option '%s'", optstr); + n = udhcp_option_idx(optstr); if (colon) *colon = ' '; udhcp_str2optset(optstr, &client_config.options); |