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| author | luigi <luigi@FreeBSD.org> | 2003-07-08 07:44:42 +0000 |
|---|---|---|
| committer | luigi <luigi@FreeBSD.org> | 2003-07-08 07:44:42 +0000 |
| commit | cbd03d1b67dba74056c1358af4ff23239c26ab40 (patch) | |
| tree | 473a57a6e5db31591a4043642f5c6b4f780e69e2 /sys/netinet/ip_fw2.c | |
| parent | f90fe69bb8bcf6a9534648edceeea0d265e8b883 (diff) | |
| download | FreeBSD-src-cbd03d1b67dba74056c1358af4ff23239c26ab40.zip FreeBSD-src-cbd03d1b67dba74056c1358af4ff23239c26ab40.tar.gz | |
Merge the handlers of O_IP_SRC_MASK and O_IP_DST_MASK opcodes, and
support matching a list of addr/mask pairs so one can write
more efficient rulesets which were not possible before e.g.
add 100 skipto 1000 not src-ip 10.0.0.0/8,127.0.0.1/8,192.168.0.0/16
The change is fully backward compatible.
ipfw2 and manpage commit to follow.
MFC after: 3 days
Diffstat (limited to 'sys/netinet/ip_fw2.c')
| -rw-r--r-- | sys/netinet/ip_fw2.c | 30 |
1 files changed, 13 insertions, 17 deletions
diff --git a/sys/netinet/ip_fw2.c b/sys/netinet/ip_fw2.c index 652c74e..1a1fdd4 100644 --- a/sys/netinet/ip_fw2.c +++ b/sys/netinet/ip_fw2.c @@ -1644,10 +1644,17 @@ check_body: break; case O_IP_SRC_MASK: - match = (hlen > 0 && - ((ipfw_insn_ip *)cmd)->addr.s_addr == - (src_ip.s_addr & - ((ipfw_insn_ip *)cmd)->mask.s_addr)); + case O_IP_DST_MASK: + if (hlen > 0) { + uint32_t a = + (cmd->opcode == O_IP_DST_MASK) ? + dst_ip.s_addr : src_ip.s_addr; + uint32_t *p = ((ipfw_insn_u32 *)cmd)->d; + int i = cmdlen-1; + + for (; !match && i>0; i-= 2, p+= 2) + match = (p[0] == (a & p[1])); + } break; case O_IP_SRC_ME: @@ -1683,13 +1690,6 @@ check_body: dst_ip.s_addr); break; - case O_IP_DST_MASK: - match = (hlen > 0) && - (((ipfw_insn_ip *)cmd)->addr.s_addr == - (dst_ip.s_addr & - ((ipfw_insn_ip *)cmd)->mask.s_addr)); - break; - case O_IP_DST_ME: if (hlen > 0) { struct ifnet *tif; @@ -2440,13 +2440,9 @@ check_ipfw_struct(struct ip_fw *rule, int size) case O_IP_SRC_MASK: case O_IP_DST_MASK: - if (cmdlen != F_INSN_SIZE(ipfw_insn_ip)) + /* only odd command lengths */ + if ( !(cmdlen & 1) || cmdlen > 31) goto bad_size; - if (((ipfw_insn_ip *)cmd)->mask.s_addr == 0) { - printf("ipfw: opcode %d, useless rule\n", - cmd->opcode); - return EINVAL; - } break; case O_IP_SRC_SET: |
