diff options
Diffstat (limited to 'src/expr/bitwise.c')
| -rw-r--r-- | src/expr/bitwise.c | 60 |
1 files changed, 54 insertions, 6 deletions
diff --git a/src/expr/bitwise.c b/src/expr/bitwise.c index 9ea2f66..1ad4f08 100644 --- a/src/expr/bitwise.c +++ b/src/expr/bitwise.c @@ -29,6 +29,8 @@ struct nftnl_expr_bitwise { union nftnl_data_reg mask; union nftnl_data_reg xor; union nftnl_data_reg data; + enum nft_registers mreg; + enum nft_registers xreg; }; static int @@ -51,10 +53,14 @@ nftnl_expr_bitwise_set(struct nftnl_expr *e, uint16_t type, memcpy(&bitwise->len, data, sizeof(bitwise->len)); break; case NFTNL_EXPR_BITWISE_MASK: + if (e->flags & (1 << NFTNL_EXPR_BITWISE_MREG)) + return -1; memcpy(&bitwise->mask.val, data, data_len); bitwise->mask.len = data_len; break; case NFTNL_EXPR_BITWISE_XOR: + if (e->flags & (1 << NFTNL_EXPR_BITWISE_XREG)) + return -1; memcpy(&bitwise->xor.val, data, data_len); bitwise->xor.len = data_len; break; @@ -62,6 +68,16 @@ nftnl_expr_bitwise_set(struct nftnl_expr *e, uint16_t type, memcpy(&bitwise->data.val, data, data_len); bitwise->data.len = data_len; break; + case NFTNL_EXPR_BITWISE_MREG: + if (e->flags & (1 << NFTNL_EXPR_BITWISE_MASK)) + return -1; + memcpy(&bitwise->mreg, data, sizeof(bitwise->mreg)); + break; + case NFTNL_EXPR_BITWISE_XREG: + if (e->flags & (1 << NFTNL_EXPR_BITWISE_XOR)) + return -1; + memcpy(&bitwise->xreg, data, sizeof(bitwise->xreg)); + break; default: return -1; } @@ -96,6 +112,12 @@ nftnl_expr_bitwise_get(const struct nftnl_expr *e, uint16_t type, case NFTNL_EXPR_BITWISE_DATA: *data_len = bitwise->data.len; return &bitwise->data.val; + case NFTNL_EXPR_BITWISE_MREG: + *data_len = sizeof(bitwise->mreg); + return &bitwise->mreg; + case NFTNL_EXPR_BITWISE_XREG: + *data_len = sizeof(bitwise->xreg); + return &bitwise->xreg; } return NULL; } @@ -113,6 +135,8 @@ static int nftnl_expr_bitwise_cb(const struct nlattr *attr, void *data) case NFTA_BITWISE_DREG: case NFTA_BITWISE_OP: case NFTA_BITWISE_LEN: + case NFTA_BITWISE_MREG: + case NFTA_BITWISE_XREG: if (mnl_attr_validate(attr, MNL_TYPE_U32) < 0) abi_breakage(); break; @@ -165,6 +189,10 @@ nftnl_expr_bitwise_build(struct nlmsghdr *nlh, const struct nftnl_expr *e) bitwise->data.val); mnl_attr_nest_end(nlh, nest); } + if (e->flags & (1 << NFTNL_EXPR_BITWISE_MREG)) + mnl_attr_put_u32(nlh, NFTA_BITWISE_MREG, htonl(bitwise->mreg)); + if (e->flags & (1 << NFTNL_EXPR_BITWISE_XREG)) + mnl_attr_put_u32(nlh, NFTA_BITWISE_XREG, htonl(bitwise->xreg)); } static int @@ -205,13 +233,22 @@ nftnl_expr_bitwise_parse(struct nftnl_expr *e, struct nlattr *attr) ret = nftnl_parse_data(&bitwise->data, tb[NFTA_BITWISE_DATA], NULL); e->flags |= (1 << NFTNL_EXPR_BITWISE_DATA); } + if (tb[NFTA_BITWISE_MREG]) { + bitwise->mreg = ntohl(mnl_attr_get_u32(tb[NFTA_BITWISE_MREG])); + e->flags |= (1 << NFTNL_EXPR_BITWISE_MREG); + } + if (tb[NFTA_BITWISE_XREG]) { + bitwise->xreg = ntohl(mnl_attr_get_u32(tb[NFTA_BITWISE_XREG])); + e->flags |= (1 << NFTNL_EXPR_BITWISE_XREG); + } return ret; } static int nftnl_expr_bitwise_snprintf_bool(char *buf, size_t size, - const struct nftnl_expr_bitwise *bitwise) + const struct nftnl_expr_bitwise *bitwise, + uint32_t flags) { int remain = size, offset = 0, ret; @@ -219,15 +256,25 @@ nftnl_expr_bitwise_snprintf_bool(char *buf, size_t size, bitwise->dreg, bitwise->sreg); SNPRINTF_BUFFER_SIZE(ret, remain, offset); - ret = nftnl_data_reg_snprintf(buf + offset, remain, &bitwise->mask, - NFTNL_OUTPUT_DEFAULT, 0, DATA_VALUE); + if (flags & (1 << NFTA_BITWISE_MASK)) + ret = nftnl_data_reg_snprintf(buf + offset, remain, + &bitwise->mask, + NFTNL_OUTPUT_DEFAULT, 0, + DATA_VALUE); + else + ret = snprintf(buf + offset, remain, "reg %u ", bitwise->mreg); SNPRINTF_BUFFER_SIZE(ret, remain, offset); ret = snprintf(buf + offset, remain, ") ^ "); SNPRINTF_BUFFER_SIZE(ret, remain, offset); - ret = nftnl_data_reg_snprintf(buf + offset, remain, &bitwise->xor, - NFTNL_OUTPUT_DEFAULT, 0, DATA_VALUE); + if (flags & (1 << NFTA_BITWISE_XOR)) + ret = nftnl_data_reg_snprintf(buf + offset, remain, + &bitwise->xor, + NFTNL_OUTPUT_DEFAULT, 0, + DATA_VALUE); + else + ret = snprintf(buf + offset, remain, "reg %u ", bitwise->xreg); SNPRINTF_BUFFER_SIZE(ret, remain, offset); return offset; @@ -260,7 +307,8 @@ static int nftnl_expr_bitwise_snprintf_default(char *buf, size_t size, switch (bitwise->op) { case NFT_BITWISE_BOOL: - err = nftnl_expr_bitwise_snprintf_bool(buf, size, bitwise); + err = nftnl_expr_bitwise_snprintf_bool(buf, size, bitwise, + e->flags); break; case NFT_BITWISE_LSHIFT: err = nftnl_expr_bitwise_snprintf_shift(buf, size, "<<", bitwise); |