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util: introduce SOCKADDR_LEN() macro

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This commit is contained in:
Yu Watanabe 2020-09-04 19:37:50 +09:00
parent fc6021554b
commit 4e0a46f65e
1 changed files with 29 additions and 0 deletions
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29
src/basic/socket-util.h
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@ -205,6 +205,35 @@ struct cmsghdr* cmsg_find(struct msghdr *mh, int level, int type, socklen_t leng
strnlen(_sa->sun_path, sizeof(_sa->sun_path))+1); \
})
#define SOCKADDR_LEN(sa) \
({ \
const union sockaddr_union *__sa = &(sa); \
size_t _len; \
switch(__sa->sa.sa_family) { \
case AF_INET: \
_len = sizeof(struct sockaddr_in); \
break; \
case AF_INET6: \
_len = sizeof(struct sockaddr_in6); \
break; \
case AF_UNIX: \
_len = SOCKADDR_UN_LEN(__sa->un); \
break; \
case AF_PACKET: \
_len = SOCKADDR_LL_LEN(__sa->ll); \
break; \
case AF_NETLINK: \
_len = sizeof(struct sockaddr_nl); \
break; \
case AF_VSOCK: \
_len = sizeof(struct sockaddr_vm); \
break; \
default: \
assert_not_reached("invalid socket family"); \
} \
_len; \
})
int socket_ioctl_fd(void);
int sockaddr_un_set_path(struct sockaddr_un *ret, const char *path);