diff options
Diffstat (limited to 'utils.c')
| -rw-r--r-- | utils.c | 63 |
1 files changed, 63 insertions, 0 deletions
@@ -15,6 +15,9 @@ #include <stdlib.h> #include "utils.h" +#include <arpa/inet.h> +#include <netinet/in.h> + void __vlist_simple_init(struct vlist_simple_tree *tree, int offset) { @@ -66,3 +69,63 @@ vlist_simple_flush_all(struct vlist_simple_tree *tree) tree->version = -1; vlist_simple_flush(tree); } + +unsigned int +parse_netmask_string(const char *str, bool v6) +{ + struct in_addr addr; + unsigned int ret; + char *err = NULL; + + if (!strchr(str, '.')) { + ret = strtoul(str, &err, 0); + if (err && *err) + goto error; + + return ret; + } + + if (v6) + goto error; + + if (inet_aton(str, &addr) != 1) + goto error; + + return 32 - fls(~(ntohl(addr.s_addr))); + +error: + return ~0; +} + +bool +split_netmask(char *str, unsigned int *netmask, bool v6) +{ + char *delim = strchr(str, '/'); + + if (delim) { + *(delim++) = 0; + + *netmask = parse_netmask_string(delim, v6); + } + return true; +} + +int +parse_ip_and_netmask(int af, const char *str, void *addr, unsigned int *netmask) +{ + char *astr = alloca(strlen(str) + 1); + + strcpy(astr, str); + if (!split_netmask(astr, netmask, af == AF_INET6)) + return 0; + + if (af == AF_INET6) { + if (*netmask > 128) + return 0; + } else { + if (*netmask > 32) + return 0; + } + + return inet_pton(af, astr, addr); +} |