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tree-wide: htonl() is weird, let's use htobe32() instead (#3538)

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Super-important change, yeah!
This commit is contained in:
Lennart Poettering 2016-06-15 01:26:01 +02:00 committed by Daniel Mack
parent 69281c49eb
commit 8e38570ebe
15 changed files with 78 additions and 52 deletions
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7
CODING_STYLE
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@ -399,3 +399,10 @@
least initially), but it needs to be there. This is particularly important
for objects that unprivileged users may allocate, but also matters for
everything else any user may allocated.
- htonl()/ntohl() and htons()/ntohs() are weird. Please use htobe32() and
htobe16() instead, it's much more descriptive, and actually says what really
is happening, after all htonl() and htons() don't operation on longs and
shorts as their name would suggest, but on uint32_t and uint16_t. Also,
"network byte order" is just a weird name for "big endian", hence we might
want to call it "big endian" right-away.

20
coccinelle/htonl.cocci Normal file
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@ -0,0 +1,20 @@
@@
expression s;
@@
- htonl(s)
+ htobe32(s)
@@
expression s;
@@
- htons(s)
+ htobe16(s)
@@
expression s;
@@
- ntohl(s)
+ be32toh(s)
@@
expression s;
@@
- ntohs(s)
+ be16toh(s)

22
src/basic/socket-util.c
View File

@ -85,7 +85,7 @@ int socket_address_parse(SocketAddress *a, const char *s) {
return -EINVAL;
a->sockaddr.in6.sin6_family = AF_INET6;
a->sockaddr.in6.sin6_port = htons((uint16_t) u);
a->sockaddr.in6.sin6_port = htobe16((uint16_t)u);
a->size = sizeof(struct sockaddr_in6);
} else if (*s == '/') {
@ -133,7 +133,7 @@ int socket_address_parse(SocketAddress *a, const char *s) {
if (r > 0) {
/* Gotcha, it's a traditional IPv4 address */
a->sockaddr.in.sin_family = AF_INET;
a->sockaddr.in.sin_port = htons((uint16_t) u);
a->sockaddr.in.sin_port = htobe16((uint16_t)u);
a->size = sizeof(struct sockaddr_in);
} else {
unsigned idx;
@ -147,7 +147,7 @@ int socket_address_parse(SocketAddress *a, const char *s) {
return -EINVAL;
a->sockaddr.in6.sin6_family = AF_INET6;
a->sockaddr.in6.sin6_port = htons((uint16_t) u);
a->sockaddr.in6.sin6_port = htobe16((uint16_t)u);
a->sockaddr.in6.sin6_scope_id = idx;
a->sockaddr.in6.sin6_addr = in6addr_any;
a->size = sizeof(struct sockaddr_in6);
@ -164,12 +164,12 @@ int socket_address_parse(SocketAddress *a, const char *s) {
if (socket_ipv6_is_supported()) {
a->sockaddr.in6.sin6_family = AF_INET6;
a->sockaddr.in6.sin6_port = htons((uint16_t) u);
a->sockaddr.in6.sin6_port = htobe16((uint16_t)u);
a->sockaddr.in6.sin6_addr = in6addr_any;
a->size = sizeof(struct sockaddr_in6);
} else {
a->sockaddr.in.sin_family = AF_INET;
a->sockaddr.in.sin_port = htons((uint16_t) u);
a->sockaddr.in.sin_port = htobe16((uint16_t)u);
a->sockaddr.in.sin_addr.s_addr = INADDR_ANY;
a->size = sizeof(struct sockaddr_in);
}
@ -488,9 +488,7 @@ int sockaddr_port(const struct sockaddr *_sa) {
if (!IN_SET(sa->sa.sa_family, AF_INET, AF_INET6))
return -EAFNOSUPPORT;
return ntohs(sa->sa.sa_family == AF_INET6 ?
sa->in6.sin6_port :
sa->in.sin_port);
return be16toh(sa->sa.sa_family == AF_INET6 ? sa->in6.sin6_port : sa->in.sin_port);
}
int sockaddr_pretty(const struct sockaddr *_sa, socklen_t salen, bool translate_ipv6, bool include_port, char **ret) {
@ -506,13 +504,13 @@ int sockaddr_pretty(const struct sockaddr *_sa, socklen_t salen, bool translate_
case AF_INET: {
uint32_t a;
a = ntohl(sa->in.sin_addr.s_addr);
a = be32toh(sa->in.sin_addr.s_addr);
if (include_port)
r = asprintf(&p,
"%u.%u.%u.%u:%u",
a >> 24, (a >> 16) & 0xFF, (a >> 8) & 0xFF, a & 0xFF,
ntohs(sa->in.sin_port));
be16toh(sa->in.sin_port));
else
r = asprintf(&p,
"%u.%u.%u.%u",
@ -534,7 +532,7 @@ int sockaddr_pretty(const struct sockaddr *_sa, socklen_t salen, bool translate_
r = asprintf(&p,
"%u.%u.%u.%u:%u",
a[0], a[1], a[2], a[3],
ntohs(sa->in6.sin6_port));
be16toh(sa->in6.sin6_port));
else
r = asprintf(&p,
"%u.%u.%u.%u",
@ -550,7 +548,7 @@ int sockaddr_pretty(const struct sockaddr *_sa, socklen_t salen, bool translate_
r = asprintf(&p,
"[%s]:%u",
a,
ntohs(sa->in6.sin6_port));
be16toh(sa->in6.sin6_port));
if (r < 0)
return -ENOMEM;
} else {

16
src/core/socket.c
View File

@ -730,16 +730,16 @@ static int instance_from_socket(int fd, unsigned nr, char **instance) {
case AF_INET: {
uint32_t
a = ntohl(local.in.sin_addr.s_addr),
b = ntohl(remote.in.sin_addr.s_addr);
a = be32toh(local.in.sin_addr.s_addr),
b = be32toh(remote.in.sin_addr.s_addr);
if (asprintf(&r,
"%u-%u.%u.%u.%u:%u-%u.%u.%u.%u:%u",
nr,
a >> 24, (a >> 16) & 0xFF, (a >> 8) & 0xFF, a & 0xFF,
ntohs(local.in.sin_port),
be16toh(local.in.sin_port),
b >> 24, (b >> 16) & 0xFF, (b >> 8) & 0xFF, b & 0xFF,
ntohs(remote.in.sin_port)) < 0)
be16toh(remote.in.sin_port)) < 0)
return -ENOMEM;
break;
@ -760,9 +760,9 @@ static int instance_from_socket(int fd, unsigned nr, char **instance) {
"%u-%u.%u.%u.%u:%u-%u.%u.%u.%u:%u",
nr,
a[0], a[1], a[2], a[3],
ntohs(local.in6.sin6_port),
be16toh(local.in6.sin6_port),
b[0], b[1], b[2], b[3],
ntohs(remote.in6.sin6_port)) < 0)
be16toh(remote.in6.sin6_port)) < 0)
return -ENOMEM;
} else {
char a[INET6_ADDRSTRLEN], b[INET6_ADDRSTRLEN];
@ -771,9 +771,9 @@ static int instance_from_socket(int fd, unsigned nr, char **instance) {
"%u-%s:%u-%s:%u",
nr,
inet_ntop(AF_INET6, &local.in6.sin6_addr, a, sizeof(a)),
ntohs(local.in6.sin6_port),
be16toh(local.in6.sin6_port),
inet_ntop(AF_INET6, &remote.in6.sin6_addr, b, sizeof(b)),
ntohs(remote.in6.sin6_port)) < 0)
be16toh(remote.in6.sin6_port)) < 0)
return -ENOMEM;
}

10
src/libsystemd-network/arp-util.c
View File

@ -79,7 +79,7 @@ int arp_network_bind_raw_socket(int ifindex, be32_t address, const struct ether_
};
union sockaddr_union link = {
.ll.sll_family = AF_PACKET,
.ll.sll_protocol = htons(ETH_P_ARP),
.ll.sll_protocol = htobe16(ETH_P_ARP),
.ll.sll_ifindex = ifindex,
.ll.sll_halen = ETH_ALEN,
.ll.sll_addr = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff },
@ -112,17 +112,17 @@ static int arp_send_packet(int fd, int ifindex,
bool announce) {
union sockaddr_union link = {
.ll.sll_family = AF_PACKET,
.ll.sll_protocol = htons(ETH_P_ARP),
.ll.sll_protocol = htobe16(ETH_P_ARP),
.ll.sll_ifindex = ifindex,
.ll.sll_halen = ETH_ALEN,
.ll.sll_addr = { 0xff, 0xff, 0xff, 0xff, 0xff, 0xff },
};
struct ether_arp arp = {
.ea_hdr.ar_hrd = htons(ARPHRD_ETHER), /* HTYPE */
.ea_hdr.ar_pro = htons(ETHERTYPE_IP), /* PTYPE */
.ea_hdr.ar_hrd = htobe16(ARPHRD_ETHER), /* HTYPE */
.ea_hdr.ar_pro = htobe16(ETHERTYPE_IP), /* PTYPE */
.ea_hdr.ar_hln = ETH_ALEN, /* HLEN */
.ea_hdr.ar_pln = sizeof(be32_t), /* PLEN */
.ea_hdr.ar_op = htons(ARPOP_REQUEST), /* REQUEST */
.ea_hdr.ar_op = htobe16(ARPOP_REQUEST), /* REQUEST */
};
int r;

4
src/libsystemd-network/dhcp-network.c
View File

@ -107,9 +107,9 @@ static int _bind_raw_socket(int ifindex, union sockaddr_union *link,
return -errno;
link->ll.sll_family = AF_PACKET;
link->ll.sll_protocol = htons(ETH_P_IP);
link->ll.sll_protocol = htobe16(ETH_P_IP);
link->ll.sll_ifindex = ifindex;
link->ll.sll_hatype = htons(arp_type);
link->ll.sll_hatype = htobe16(arp_type);
link->ll.sll_halen = mac_addr_len;
memcpy(link->ll.sll_addr, bcast_addr, mac_addr_len);

3
src/libsystemd-network/lldp-network.c
View File

@ -57,7 +57,8 @@ int lldp_network_bind_raw_socket(int ifindex) {
assert(ifindex > 0);
fd = socket(PF_PACKET, SOCK_RAW|SOCK_CLOEXEC|SOCK_NONBLOCK, htons(ETHERTYPE_LLDP));
fd = socket(PF_PACKET, SOCK_RAW|SOCK_CLOEXEC|SOCK_NONBLOCK,
htobe16(ETHERTYPE_LLDP));
if (fd < 0)
return -errno;

2
src/libsystemd-network/sd-dhcp-server.c
View File

@ -260,7 +260,7 @@ static int dhcp_server_send_unicast_raw(sd_dhcp_server *server,
DHCPPacket *packet, size_t len) {
union sockaddr_union link = {
.ll.sll_family = AF_PACKET,
.ll.sll_protocol = htons(ETH_P_IP),
.ll.sll_protocol = htobe16(ETH_P_IP),
.ll.sll_ifindex = server->ifindex,
.ll.sll_halen = ETH_ALEN,
};

4
src/libsystemd/sd-daemon/sd-daemon.c
View File

@ -310,12 +310,12 @@ _public_ int sd_is_socket_inet(int fd, int family, int type, int listening, uint
if (l < sizeof(struct sockaddr_in))
return -EINVAL;
return htons(port) == sockaddr.in.sin_port;
return htobe16(port) == sockaddr.in.sin_port;
} else {
if (l < sizeof(struct sockaddr_in6))
return -EINVAL;
return htons(port) == sockaddr.in6.sin6_port;
return htobe16(port) == sockaddr.in6.sin6_port;
}
}

14
src/libudev/libudev-monitor.c
View File

@ -650,9 +650,9 @@ retry:
if (memcmp(buf.raw, "libudev", 8) == 0) {
/* udev message needs proper version magic */
if (buf.nlh.magic != htonl(UDEV_MONITOR_MAGIC)) {
if (buf.nlh.magic != htobe32(UDEV_MONITOR_MAGIC)) {
log_debug("unrecognized message signature (%x != %x)",
buf.nlh.magic, htonl(UDEV_MONITOR_MAGIC));
buf.nlh.magic, htobe32(UDEV_MONITOR_MAGIC));
return NULL;
}
if (buf.nlh.properties_off+32 > (size_t)buflen) {
@ -715,7 +715,7 @@ int udev_monitor_send_device(struct udev_monitor *udev_monitor,
ssize_t blen, count;
struct udev_monitor_netlink_header nlh = {
.prefix = "libudev",
.magic = htonl(UDEV_MONITOR_MAGIC),
.magic = htobe32(UDEV_MONITOR_MAGIC),
.header_size = sizeof nlh,
};
struct iovec iov[2] = {
@ -736,19 +736,19 @@ int udev_monitor_send_device(struct udev_monitor *udev_monitor,
/* fill in versioned header */
val = udev_device_get_subsystem(udev_device);
nlh.filter_subsystem_hash = htonl(util_string_hash32(val));
nlh.filter_subsystem_hash = htobe32(util_string_hash32(val));
val = udev_device_get_devtype(udev_device);
if (val != NULL)
nlh.filter_devtype_hash = htonl(util_string_hash32(val));
nlh.filter_devtype_hash = htobe32(util_string_hash32(val));
/* add tag bloom filter */
tag_bloom_bits = 0;
udev_list_entry_foreach(list_entry, udev_device_get_tags_list_entry(udev_device))
tag_bloom_bits |= util_string_bloom64(udev_list_entry_get_name(list_entry));
if (tag_bloom_bits > 0) {
nlh.filter_tag_bloom_hi = htonl(tag_bloom_bits >> 32);
nlh.filter_tag_bloom_lo = htonl(tag_bloom_bits & 0xffffffff);
nlh.filter_tag_bloom_hi = htobe32(tag_bloom_bits >> 32);
nlh.filter_tag_bloom_lo = htobe32(tag_bloom_bits & 0xffffffff);
}
/* add properties list */

2
src/network/networkd-ipv4ll.c
View File

@ -138,7 +138,7 @@ static int ipv4ll_address_claimed(sd_ipv4ll *ll, Link *link) {
ll_addr->family = AF_INET;
ll_addr->in_addr.in = address;
ll_addr->prefixlen = 16;
ll_addr->broadcast.s_addr = ll_addr->in_addr.in.s_addr | htonl(0xfffffffflu >> ll_addr->prefixlen);
ll_addr->broadcast.s_addr = ll_addr->in_addr.in.s_addr | htobe32(0xfffffffflu >> ll_addr->prefixlen);
ll_addr->scope = RT_SCOPE_LINK;
r = address_configure(ll_addr, link, ipv4ll_address_handler, false);

4
src/network/networkd-netdev-tunnel.c
View File

@ -35,7 +35,7 @@
#include "util.h"
#define DEFAULT_TNL_HOP_LIMIT 64
#define IP6_FLOWINFO_FLOWLABEL htonl(0x000FFFFF)
#define IP6_FLOWINFO_FLOWLABEL htobe32(0x000FFFFF)
static const char* const ip6tnl_mode_table[_NETDEV_IP6_TNL_MODE_MAX] = {
[NETDEV_IP6_TNL_MODE_IP6IP6] = "ip6ip6",
@ -519,7 +519,7 @@ int config_parse_ipv6_flowlabel(const char* unit,
if (k > 0xFFFFF)
log_syntax(unit, LOG_ERR, filename, line, 0, "Failed to parse IPv6 flowlabel option, ignoring: %s", rvalue);
else {
*ipv6_flowlabel = htonl(k) & IP6_FLOWINFO_FLOWLABEL;
*ipv6_flowlabel = htobe32(k) & IP6_FLOWINFO_FLOWLABEL;
t->flags &= ~IP6_TNL_F_USE_ORIG_FLOWLABEL;
}
}

10
src/nss-myhostname/nss-myhostname.c
View File

@ -38,7 +38,7 @@
* IPv6 we use ::1 which unfortunately will not translate back to the
* hostname but instead something like "localhost" or so. */
#define LOCALADDRESS_IPV4 (htonl(0x7F000002))
#define LOCALADDRESS_IPV4 (htobe32(0x7F000002))
#define LOCALADDRESS_IPV6 &in6addr_loopback
NSS_GETHOSTBYNAME_PROTOTYPES(myhostname);
@ -75,7 +75,7 @@ enum nss_status _nss_myhostname_gethostbyname4_r(
* is optional */
canonical = "localhost";
local_address_ipv4 = htonl(INADDR_LOOPBACK);
local_address_ipv4 = htobe32(INADDR_LOOPBACK);
} else if (is_gateway_hostname(name)) {
@ -348,7 +348,7 @@ enum nss_status _nss_myhostname_gethostbyname3_r(
if (is_localhost(name)) {
canonical = "localhost";
local_address_ipv4 = htonl(INADDR_LOOPBACK);
local_address_ipv4 = htobe32(INADDR_LOOPBACK);
} else if (is_gateway_hostname(name)) {
@ -437,9 +437,9 @@ enum nss_status _nss_myhostname_gethostbyaddr2_r(
if ((*(uint32_t*) addr) == LOCALADDRESS_IPV4)
goto found;
if ((*(uint32_t*) addr) == htonl(INADDR_LOOPBACK)) {
if ((*(uint32_t*) addr) == htobe32(INADDR_LOOPBACK)) {
canonical = "localhost";
local_address_ipv4 = htonl(INADDR_LOOPBACK);
local_address_ipv4 = htobe32(INADDR_LOOPBACK);
goto found;
}

4
src/test/test-nss.c
View File

@ -400,8 +400,8 @@ int main(int argc, char **argv) {
_cleanup_free_ char *dir = NULL, *hostname = NULL;
const char *module;
const uint32_t local_address_ipv4 = htonl(0x7F000001);
const uint32_t local_address_ipv4_2 = htonl(0x7F000002);
const uint32_t local_address_ipv4 = htobe32(0x7F000001);
const uint32_t local_address_ipv4_2 = htobe32(0x7F000002);
_cleanup_free_ struct local_address *addresses = NULL;
int n_addresses;

8
src/test/test-socket-util.c
View File

@ -353,7 +353,7 @@ static void test_nameinfo_pretty(void) {
union sockaddr_union s = {
.in.sin_family = AF_INET,
.in.sin_port = 0,
.in.sin_addr.s_addr = htonl(INADDR_ANY),
.in.sin_addr.s_addr = htobe32(INADDR_ANY),
};
int r;
@ -391,17 +391,17 @@ static void test_sockaddr_equal(void) {
union sockaddr_union a = {
.in.sin_family = AF_INET,
.in.sin_port = 0,
.in.sin_addr.s_addr = htonl(INADDR_ANY),
.in.sin_addr.s_addr = htobe32(INADDR_ANY),
};
union sockaddr_union b = {
.in.sin_family = AF_INET,
.in.sin_port = 0,
.in.sin_addr.s_addr = htonl(INADDR_ANY),
.in.sin_addr.s_addr = htobe32(INADDR_ANY),
};
union sockaddr_union c = {
.in.sin_family = AF_INET,
.in.sin_port = 0,
.in.sin_addr.s_addr = htonl(1234),
.in.sin_addr.s_addr = htobe32(1234),
};
union sockaddr_union d = {
.in6.sin6_family = AF_INET6,