odhcp6c, branch master

dhcpv6: add config for strict RFC7550

2026-01-25T13:54:38Z

Some ISPs don't comply with RFC7550 and need workarounds to get proper IPv6 connectivity. Link: https://github.com/openwrt/odhcp6c/pull/152 Signed-off-by: Álvaro Fernández Rojas

dhcpv6: replace hash_ifname() with MD5 implementation

2026-01-24T20:42:42Z

Replace hash_ifname() with new implementation based on MD5 hash. This implementation generates the same output as: https://github.com/openwrt/openwrt/commit/e1f2b666ff94f2b8a50ca000d69f5b5f0b89a27c Link: https://github.com/openwrt/odhcp6c/pull/150 Signed-off-by: Álvaro Fernández Rojas

dhcpv6: omit IA_NA on Request

2025-12-29T11:33:34Z

Omit IA_NA on Request if not present on Solicit, which is against RFC7550, but turns out some broken ISPs don't like this. See https://github.com/openwrt/odhcp6c/issues/144 Closes: https://github.com/openwrt/odhcp6c/issues/144 Link: https://github.com/openwrt/odhcp6c/pull/147 Fixes: 63461f64d4c1 ("dhcpv6: always include IA_NA and IA_PD in Request message if requested") Signed-off-by: Álvaro Fernández Rojas

dhcpv6: dhcpv6_send: convert whitespaces to tabs

2025-12-29T10:29:32Z

Properly align code with tabs instead of whitespaces. Signed-off-by: Álvaro Fernández Rojas

ra: convert if block to switch

2025-12-28T11:48:22Z

Improve readability and accelerate jumps. Signed-off-by: Paul Donald Link: https://github.com/openwrt/odhcp6c/pull/146 Signed-off-by: Álvaro Fernández Rojas

odhcp6c: do cleanup at exit

2025-12-28T11:46:37Z

cleanup frees all state buffers, releases any auth token, and closes the random FD to avoid lingering allocations after exit. Signed-off-by: Paul Donald Link: https://github.com/openwrt/odhcp6c/pull/145 Signed-off-by: Álvaro Fernández Rojas

config: fix potential memory leaks in error paths

2025-12-28T11:46:17Z

In the parsing helpers we do: `*dst = realloc(*dst, ...); if (!*dst) return -1;` If a later realloc call failed, the previous buffer pointer was overwritten with NULL, so the already allocated block is lost. We're probably already in a dire situation if we cannot allocate more memory, so the fix is a principled one. The caller `config_parse_opt()` does `free(payload)`. Signed-off-by: Paul Donald Link: https://github.com/openwrt/odhcp6c/pull/145 Signed-off-by: Álvaro Fernández Rojas

all: add log helpers

2025-12-22T15:44:17Z

avoids multiple syslog.h include (sync with implementation in odhcpd) We deprecate the `-v` param. Add new `-l` param for level, identical to odhcpd. The odhcp6c `dhcpv6.sh` script in openwrt main should be updated to recognize this change, but it is harmless if it is not changed. Signed-off-by: Paul Donald Link: https://github.com/openwrt/odhcp6c/pull/142 Signed-off-by: Álvaro Fernández Rojas

dhcpv6: clarifying comments

2025-12-22T11:11:08Z

Add comments to make it easier to follow the code. Signed-off-by: Paul Donald Link: https://github.com/openwrt/odhcp6c/pull/143 Signed-off-by: Álvaro Fernández Rojas

dhcpv6: offload FQDN construction to init_dhcpv6

2025-12-22T11:11:01Z

Improve performance by doing this only once at init, instead of every time at dhcpv6_send. We also add a length check for dn_comp which can return -1. Signed-off-by: Paul Donald Link: https://github.com/openwrt/odhcp6c/pull/143 Signed-off-by: Álvaro Fernández Rojas