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https://github.com/systemd/systemd-stable.git
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319a4f4bc4
We recently started making more use of malloc_usable_size() and rely on it (see the string_erase() story). Given that we don't really support sytems where malloc_usable_size() cannot be trusted beyond statistics anyway, let's go fully in and rework GREEDY_REALLOC() on top of it: instead of passing around and maintaining the currenly allocated size everywhere, let's just derive it automatically from malloc_usable_size(). I am mostly after this for the simplicity this brings. It also brings minor efficiency improvements I guess, but things become so much nicer to look at if we can avoid these allocation size variables everywhere. Note that the malloc_usable_size() man page says relying on it wasn't "good programming practice", but I think it does this for reasons that don't apply here: the greedy realloc logic specifically doesn't rely on the returned extra size, beyond the fact that it is equal or larger than what was requested. (This commit was supposed to be a quick patch btw, but apparently we use the greedy realloc stuff quite a bit across the codebase, so this ends up touching *a*lot* of code.)
85 lines
2.0 KiB
C
85 lines
2.0 KiB
C
/* SPDX-License-Identifier: LGPL-2.1-or-later */
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#pragma once
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/***
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Copyright © 2013 Intel Corporation. All rights reserved.
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***/
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#include "sd-dhcp-client.h"
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#include "dhcp-internal.h"
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#include "dhcp-protocol.h"
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#include "list.h"
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#include "util.h"
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struct sd_dhcp_route {
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struct in_addr dst_addr;
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struct in_addr gw_addr;
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unsigned char dst_prefixlen;
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uint8_t option;
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};
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struct sd_dhcp_raw_option {
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LIST_FIELDS(struct sd_dhcp_raw_option, options);
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uint8_t tag;
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uint8_t length;
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void *data;
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};
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struct sd_dhcp_lease {
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unsigned n_ref;
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/* each 0 if unset */
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uint32_t t1;
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uint32_t t2;
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uint32_t lifetime;
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/* each 0 if unset */
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be32_t address;
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be32_t server_address;
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be32_t next_server;
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bool have_subnet_mask;
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be32_t subnet_mask;
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bool have_broadcast;
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be32_t broadcast;
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struct in_addr *router;
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size_t router_size;
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DHCPServerData servers[_SD_DHCP_LEASE_SERVER_TYPE_MAX];
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struct sd_dhcp_route *static_route;
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size_t static_route_size;
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uint16_t mtu; /* 0 if unset */
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char *domainname;
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char **search_domains;
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char *hostname;
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char *root_path;
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void *client_id;
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size_t client_id_len;
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void *vendor_specific;
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size_t vendor_specific_len;
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char *timezone;
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LIST_HEAD(struct sd_dhcp_raw_option, private_options);
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};
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int dhcp_lease_new(sd_dhcp_lease **ret);
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int dhcp_lease_parse_options(uint8_t code, uint8_t len, const void *option, void *userdata);
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int dhcp_lease_parse_search_domains(const uint8_t *option, size_t len, char ***domains);
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int dhcp_lease_insert_private_option(sd_dhcp_lease *lease, uint8_t tag, const void *data, uint8_t len);
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int dhcp_lease_set_default_subnet_mask(sd_dhcp_lease *lease);
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int dhcp_lease_set_client_id(sd_dhcp_lease *lease, const void *client_id, size_t client_id_len);
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