diff options
Diffstat (limited to 'src/libsystemd-network/dhcp6-option.c')
| -rw-r--r-- | src/libsystemd-network/dhcp6-option.c | 82 |
1 files changed, 82 insertions, 0 deletions
diff --git a/src/libsystemd-network/dhcp6-option.c b/src/libsystemd-network/dhcp6-option.c index 693170bf0c..6da7ea7e27 100644 --- a/src/libsystemd-network/dhcp6-option.c +++ b/src/libsystemd-network/dhcp6-option.c @@ -26,9 +26,11 @@ #include "sparse-endian.h" #include "unaligned.h" #include "util.h" +#include "strv.h" #include "dhcp6-internal.h" #include "dhcp6-protocol.h" +#include "dns-domain.h" #define DHCP6_OPTION_IA_NA_LEN 12 #define DHCP6_OPTION_IA_TA_LEN 4 @@ -335,3 +337,83 @@ int dhcp6_option_parse_ip6addrs(uint8_t *optval, uint16_t optlen, return count; } + +int dhcp6_option_parse_domainname(const uint8_t *optval, uint16_t optlen, + char ***str_arr) +{ + size_t pos = 0, idx = 0; + _cleanup_free_ char **names = NULL; + int r; + + assert_return(optlen > 1, -ENODATA); + assert_return(optval[optlen] == '\0', -EINVAL); + + while (pos < optlen) { + _cleanup_free_ char *ret = NULL; + size_t n = 0, allocated = 0; + bool first = true; + + for (;;) { + uint8_t c; + + c = optval[pos++]; + + if (c == 0) + /* End of name */ + break; + else if (c <= 63) { + _cleanup_free_ char *t = NULL; + const char *label; + + /* Literal label */ + label = (const char *)&optval[pos]; + pos += c; + if (pos > optlen) + return -EMSGSIZE; + + r = dns_label_escape(label, c, &t); + if (r < 0) + goto fail; + + if (!GREEDY_REALLOC0(ret, allocated, n + !first + strlen(t) + 1)) { + r = -ENOMEM; + goto fail; + } + + if (!first) + ret[n++] = '.'; + else + first = false; + + memcpy(ret + n, t, r); + n += r; + continue; + } else { + r = -EBADMSG; + goto fail; + } + } + + if (!GREEDY_REALLOC(ret, allocated, n + 1)) { + r = -ENOMEM; + goto fail; + } + + ret[n] = 0; + + r = strv_extend(&names, ret); + if (r < 0) + goto fail; + + ret = NULL; + idx++; + } + + *str_arr = names; + names = NULL; + + return idx; + +fail: + return r; +} |