48 lines
2.2 KiB
Diff
48 lines
2.2 KiB
Diff
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From 44481a8b537839cd9ffead4d261491641f5b5260 Mon Sep 17 00:00:00 2001
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From: =?UTF-8?q?Zbigniew=20J=C4=99drzejewski-Szmek?= <zbyszek@in.waw.pl>
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Date: Sat, 30 Aug 2014 18:31:21 -0400
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Subject: [PATCH] sd-dhcp6-client: properly calculate buffer size when parsing
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options
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Also make pointer calculations more explicit so they are
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easier to understand.
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---
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src/libsystemd-network/sd-dhcp6-client.c | 5 ++++-
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src/libsystemd-network/test-dhcp6-client.c | 2 +-
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2 files changed, 5 insertions(+), 2 deletions(-)
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diff --git a/src/libsystemd-network/sd-dhcp6-client.c b/src/libsystemd-network/sd-dhcp6-client.c
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index 342a231413..6860c66858 100644
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--- a/src/libsystemd-network/sd-dhcp6-client.c
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+++ b/src/libsystemd-network/sd-dhcp6-client.c
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@@ -583,12 +583,15 @@ static int client_parse_message(sd_dhcp6_client *client,
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DHCP6Message *message, size_t len,
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sd_dhcp6_lease *lease) {
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int r;
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- uint8_t *optval, *option = (uint8_t *)(message + 1), *id = NULL;
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+ uint8_t *optval, *option, *id = NULL;
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uint16_t optcode, status;
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size_t optlen, id_len;
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bool clientid = false;
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be32_t iaid_lease;
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+ option = (uint8_t *)message + sizeof(DHCP6Message);
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+ len -= sizeof(DHCP6Message);
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+
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while ((r = dhcp6_option_parse(&option, &len, &optcode, &optlen,
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&optval)) >= 0) {
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switch (optcode) {
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diff --git a/src/libsystemd-network/test-dhcp6-client.c b/src/libsystemd-network/test-dhcp6-client.c
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index 259db33bcd..d102a796b4 100644
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--- a/src/libsystemd-network/test-dhcp6-client.c
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+++ b/src/libsystemd-network/test-dhcp6-client.c
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@@ -205,7 +205,7 @@ static uint8_t msg_reply[173] = {
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static int test_advertise_option(sd_event *e) {
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_cleanup_dhcp6_lease_free_ sd_dhcp6_lease *lease = NULL;
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DHCP6Message *advertise = (DHCP6Message *)msg_advertise;
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- uint8_t *optval, *opt = &msg_advertise[sizeof(DHCP6Message)];
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+ uint8_t *optval, *opt = msg_advertise + sizeof(DHCP6Message);
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uint16_t optcode;
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size_t optlen, len = sizeof(msg_advertise) - sizeof(DHCP6Message);
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be32_t val;
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