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Code

rtnl: clean up/add asserts

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This commit is contained in:
Tom Gundersen 2013-12-06 15:13:34 +01:00
parent 3e10a9f410
commit 9d0db17836
3 changed files with 69 additions and 26 deletions
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5
src/libsystemd-rtnl/rtnl-internal.h
View File

@ -86,6 +86,11 @@ struct sd_rtnl {
int message_new_synthetic_error(int error, uint32_t serial, sd_rtnl_message **ret);
uint32_t message_get_serial(sd_rtnl_message *m);
int message_seal(sd_rtnl *nl, sd_rtnl_message *m);
bool message_type_is_link(uint16_t type);
bool message_type_is_addr(uint16_t type);
bool message_type_is_route(uint16_t type);
int socket_write_message(sd_rtnl *nl, sd_rtnl_message *m);
int socket_read_message(sd_rtnl *nl, sd_rtnl_message **ret);

86
src/libsystemd-rtnl/rtnl-message.c
View File

@ -91,6 +91,40 @@ int message_new_synthetic_error(int error, uint32_t serial, sd_rtnl_message **re
return 0;
}
bool message_type_is_route(uint16_t type) {
switch (type) {
case RTM_NEWROUTE:
case RTM_GETROUTE:
case RTM_DELROUTE:
return true;
default:
return false;
}
}
bool message_type_is_link(uint16_t type) {
switch (type) {
case RTM_NEWLINK:
case RTM_SETLINK:
case RTM_GETLINK:
case RTM_DELLINK:
return true;
default:
return false;
}
}
bool message_type_is_addr(uint16_t type) {
switch (type) {
case RTM_NEWADDR:
case RTM_GETADDR:
case RTM_DELADDR:
return true;
default:
return false;
}
}
int sd_rtnl_message_route_new(uint16_t nlmsg_type, unsigned char rtm_family,
unsigned char rtm_dst_len, unsigned char rtm_src_len,
unsigned char rtm_tos, unsigned char rtm_table,
@ -99,8 +133,7 @@ int sd_rtnl_message_route_new(uint16_t nlmsg_type, unsigned char rtm_family,
struct rtmsg *rtm;
int r;
assert_return(nlmsg_type == RTM_NEWROUTE || nlmsg_type == RTM_DELROUTE ||
nlmsg_type == RTM_GETROUTE, -EINVAL);
assert_return(message_type_is_route(nlmsg_type), -EINVAL);
assert_return(ret, -EINVAL);
r = message_new(ret, NLMSG_SPACE(sizeof(struct rtmsg)));
@ -131,8 +164,7 @@ int sd_rtnl_message_link_new(uint16_t nlmsg_type, int index, unsigned type, unsi
struct ifinfomsg *ifi;
int r;
assert_return(nlmsg_type == RTM_NEWLINK || nlmsg_type == RTM_DELLINK ||
nlmsg_type == RTM_SETLINK || nlmsg_type == RTM_GETLINK, -EINVAL);
assert_return(message_type_is_link(nlmsg_type), -EINVAL);
assert_return(nlmsg_type == RTM_NEWLINK || index > 0, -EINVAL);
assert_return(ret, -EINVAL);
@ -160,7 +192,7 @@ int sd_rtnl_message_addr_new(uint16_t nlmsg_type, int index, unsigned char famil
struct ifaddrmsg *ifa;
int r;
assert_return(nlmsg_type == RTM_NEWADDR || nlmsg_type == RTM_DELADDR || nlmsg_type == RTM_GETADDR, -EINVAL);
assert_return(message_type_is_addr(nlmsg_type), -EINVAL);
assert_return(index > 0, -EINVAL);
assert_return(ret, -EINVAL);
@ -211,9 +243,9 @@ int sd_rtnl_message_link_get_ifindex(sd_rtnl_message *m, int *ifindex) {
struct ifinfomsg *ifi;
assert_return(m, -EINVAL);
assert_return(m->hdr, -EINVAL);
assert_return(message_type_is_link(m->hdr->nlmsg_type), -EINVAL);
assert_return(ifindex, -EINVAL);
assert_return(m->hdr->nlmsg_type == RTM_NEWLINK || m->hdr->nlmsg_type == RTM_DELLINK ||
m->hdr->nlmsg_type == RTM_GETLINK || m->hdr->nlmsg_type == RTM_SETLINK, -EINVAL);
ifi = NLMSG_DATA(m->hdr);
@ -226,9 +258,9 @@ int sd_rtnl_message_link_get_flags(sd_rtnl_message *m, unsigned *flags) {
struct ifinfomsg *ifi;
assert_return(m, -EINVAL);
assert_return(m->hdr, -EINVAL);
assert_return(message_type_is_link(m->hdr->nlmsg_type), -EINVAL);
assert_return(flags, -EINVAL);
assert_return(m->hdr->nlmsg_type == RTM_NEWLINK || m->hdr->nlmsg_type == RTM_DELLINK ||
m->hdr->nlmsg_type == RTM_GETLINK || m->hdr->nlmsg_type == RTM_SETLINK, -EINVAL);
ifi = NLMSG_DATA(m->hdr);
@ -406,18 +438,13 @@ int sd_rtnl_message_open_container(sd_rtnl_message *m, unsigned short type) {
sd_rtnl_message_get_type(m, &rtm_type);
switch (rtm_type) {
case RTM_NEWLINK:
case RTM_SETLINK:
case RTM_GETLINK:
case RTM_DELLINK:
if (type == IFLA_LINKINFO)
return add_rtattr(m, type, NULL, 0);
else
return -ENOTSUP;
default:
if (message_type_is_link(rtm_type)) {
if (type == IFLA_LINKINFO)
return add_rtattr(m, type, NULL, 0);
else
return -ENOTSUP;
}
} else
return -ENOTSUP;
return 0;
}
@ -519,6 +546,7 @@ int sd_rtnl_message_read(sd_rtnl_message *m, unsigned short *type, void **data)
uint32_t message_get_serial(sd_rtnl_message *m) {
assert(m);
assert(m->hdr);
return m->hdr->nlmsg_seq;
}
@ -527,6 +555,7 @@ int sd_rtnl_message_get_errno(sd_rtnl_message *m) {
struct nlmsgerr *err;
assert_return(m, -EINVAL);
assert_return(m->hdr, -EINVAL);
if (m->hdr->nlmsg_type != NLMSG_ERROR)
return 0;
@ -537,6 +566,10 @@ int sd_rtnl_message_get_errno(sd_rtnl_message *m) {
}
int message_seal(sd_rtnl *nl, sd_rtnl_message *m) {
assert(nl);
assert(m);
assert(m->hdr);
if (m->sealed)
return -EPERM;
@ -547,8 +580,8 @@ int message_seal(sd_rtnl *nl, sd_rtnl_message *m) {
}
static int message_receive_need(sd_rtnl *rtnl, size_t *need) {
assert_return(rtnl, -EINVAL);
assert_return(need, -EINVAL);
assert(rtnl);
assert(need);
/* ioctl(rtnl->fd, FIONREAD, &need)
Does not appear to work on netlink sockets. libnl uses
@ -576,8 +609,9 @@ int socket_write_message(sd_rtnl *nl, sd_rtnl_message *m) {
};
ssize_t k;
assert_return(nl, -EINVAL);
assert_return(m, -EINVAL);
assert(nl);
assert(m);
assert(m->hdr);
k = sendto(nl->fd, m->hdr, m->hdr->nlmsg_len,
0, &addr.sa, sizeof(addr));
@ -603,8 +637,8 @@ int socket_read_message(sd_rtnl *nl, sd_rtnl_message **ret) {
ssize_t k;
size_t need;
assert_return(nl, -EINVAL);
assert_return(ret, -EINVAL);
assert(nl);
assert(ret);
r = message_receive_need(nl, &need);
if (r < 0)

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

@ -75,6 +75,8 @@ int sd_rtnl_open(uint32_t groups, sd_rtnl **ret) {
socklen_t addrlen;
int r;
assert_return(ret, -EINVAL);
r = sd_rtnl_new(&rtnl);
if (r < 0)
return r;
@ -316,6 +318,8 @@ static int process_running(sd_rtnl *rtnl, sd_rtnl_message **ret) {
_cleanup_sd_rtnl_message_unref_ sd_rtnl_message *m = NULL;
int r;
assert(rtnl);
r = process_timeout(rtnl);
if (r != 0)
goto null_message;