diff options
Diffstat (limited to 'pimd/pim_util.c')
| -rw-r--r-- | pimd/pim_util.c | 132 |
1 files changed, 62 insertions, 70 deletions
diff --git a/pimd/pim_util.c b/pimd/pim_util.c index 1125db00a9..0e0a754993 100644 --- a/pimd/pim_util.c +++ b/pimd/pim_util.c @@ -11,7 +11,7 @@ WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. - + You should have received a copy of the GNU General Public License along with this program; see the file COPYING; if not, write to the Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, @@ -27,18 +27,18 @@ /* RFC 3376: 4.1.7. QQIC (Querier's Query Interval Code) - + If QQIC < 128, QQI = QQIC If QQIC >= 128, QQI = (mant | 0x10) << (exp + 3) - + 0 1 2 3 4 5 6 7 +-+-+-+-+-+-+-+-+ |1| exp | mant | +-+-+-+-+-+-+-+-+ - + Since exp=0..7 then (exp+3)=3..10, then QQI has one of the following bit patterns: - + exp=0: QQI = 0000.0000.1MMM.M000 exp=1: QQI = 0000.0001.MMMM.0000 ... @@ -49,33 +49,32 @@ */ uint8_t igmp_msg_encode16to8(uint16_t value) { - uint8_t code; - - if (value < 128) { - code = value; - } - else { - uint16_t mask = 0x4000; - uint8_t exp; - uint16_t mant; - for (exp = 7; exp > 0; --exp) { - if (mask & value) - break; - mask >>= 1; - } - mant = 0x000F & (value >> (exp + 3)); - code = ((uint8_t) 1 << 7) | ((uint8_t) exp << 4) | (uint8_t) mant; - } - - return code; + uint8_t code; + + if (value < 128) { + code = value; + } else { + uint16_t mask = 0x4000; + uint8_t exp; + uint16_t mant; + for (exp = 7; exp > 0; --exp) { + if (mask & value) + break; + mask >>= 1; + } + mant = 0x000F & (value >> (exp + 3)); + code = ((uint8_t)1 << 7) | ((uint8_t)exp << 4) | (uint8_t)mant; + } + + return code; } /* RFC 3376: 4.1.7. QQIC (Querier's Query Interval Code) - + If QQIC < 128, QQI = QQIC If QQIC >= 128, QQI = (mant | 0x10) << (exp + 3) - + 0 1 2 3 4 5 6 7 +-+-+-+-+-+-+-+-+ |1| exp | mant | @@ -83,64 +82,57 @@ uint8_t igmp_msg_encode16to8(uint16_t value) */ uint16_t igmp_msg_decode8to16(uint8_t code) { - uint16_t value; - - if (code < 128) { - value = code; - } - else { - uint16_t mant = (code & 0x0F); - uint8_t exp = (code & 0x70) >> 4; - value = (mant | 0x10) << (exp + 3); - } - - return value; + uint16_t value; + + if (code < 128) { + value = code; + } else { + uint16_t mant = (code & 0x0F); + uint8_t exp = (code & 0x70) >> 4; + value = (mant | 0x10) << (exp + 3); + } + + return value; } void pim_pkt_dump(const char *label, const uint8_t *buf, int size) { - zlog_debug("%s: pkt dump size=%d", - label, - size); - zlog_hexdump(buf, size); + zlog_debug("%s: pkt dump size=%d", label, size); + zlog_hexdump(buf, size); } -int -pim_is_group_224_0_0_0_24 (struct in_addr group_addr) +int pim_is_group_224_0_0_0_24(struct in_addr group_addr) { - static int first = 1; - static struct prefix group_224; - struct prefix group; + static int first = 1; + static struct prefix group_224; + struct prefix group; - if (first) - { - str2prefix ("224.0.0.0/24", &group_224); - first = 0; - } + if (first) { + str2prefix("224.0.0.0/24", &group_224); + first = 0; + } - group.family = AF_INET; - group.u.prefix4 = group_addr; - group.prefixlen = 32; + group.family = AF_INET; + group.u.prefix4 = group_addr; + group.prefixlen = 32; - return prefix_match (&group_224, &group); + return prefix_match(&group_224, &group); } -int -pim_is_group_224_4 (struct in_addr group_addr) +int pim_is_group_224_4(struct in_addr group_addr) { - static int first = 1; - static struct prefix group_all; - struct prefix group; + static int first = 1; + static struct prefix group_all; + struct prefix group; - if (first) - { - str2prefix ("224.0.0.0/4", &group_all); - first = 0; - } + if (first) { + str2prefix("224.0.0.0/4", &group_all); + first = 0; + } - group.family = AF_INET; - group.u.prefix4 = group_addr; - group.prefixlen = 32; + group.family = AF_INET; + group.u.prefix4 = group_addr; + group.prefixlen = 32; - return prefix_match (&group_all, &group); + return prefix_match(&group_all, &group); } |