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| author | Martin Lewis <martin.lewis.x84@gmail.com> | 2020-06-23 15:25:08 -0500 |
|---|---|---|
| committer | Denys Vlasenko <vda.linux@googlemail.com> | 2020-06-29 14:57:02 +0200 |
| commit | acdc8eed89399a9fa5e7478ee40b928c65e3ab4e (patch) | |
| tree | 406e5c338b8d22c895cb16bdee9151202efe0ead /networking/udhcp/common.h | |
| parent | fc2ce04a38ebfb03f9aeff205979786839cd5a7c (diff) | |
| download | busybox-acdc8eed89399a9fa5e7478ee40b928c65e3ab4e.tar.gz | |
udhcp: add option scanner
Added an option scanner to udhcp to enable iteration over packet options.
Signed-off-by: Martin Lewis <martin.lewis.x84@gmail.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
Diffstat (limited to 'networking/udhcp/common.h')
| -rw-r--r-- | networking/udhcp/common.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/networking/udhcp/common.h b/networking/udhcp/common.h index 6214db06a..81c1dcbdc 100644 --- a/networking/udhcp/common.h +++ b/networking/udhcp/common.h @@ -107,6 +107,12 @@ enum { OPTION_LIST = 0x20, }; +struct dhcp_scan_state { + int overload; + int rem; + uint8_t *optionptr; +}; + /* DHCP option codes (partial list). See RFC 2132 and * http://www.iana.org/assignments/bootp-dhcp-parameters/ * Commented out options are handled by common option machinery, @@ -206,6 +212,8 @@ extern const uint8_t dhcp_option_lengths[] ALIGN1; unsigned FAST_FUNC udhcp_option_idx(const char *name, const char *option_strings); +void init_scan_state(struct dhcp_packet *packet, struct dhcp_scan_state *scan_state) FAST_FUNC; +uint8_t *udhcp_scan_options(struct dhcp_packet *packet, struct dhcp_scan_state *scan_state) FAST_FUNC; uint8_t *udhcp_get_option(struct dhcp_packet *packet, int code) FAST_FUNC; /* Same as above + ensures that option length is 4 bytes * (returns NULL if size is different) |