[dpdk-dev] [PATCH] app/testpmd: fix support of hex string parser for flow API
Ananyev, Konstantin
konstantin.ananyev at intel.com
Fri Mar 15 10:44:52 CET 2019
Hi Wei,
>
> There is need for users to set configuration of HEX number for RSS
> key. The key byte should be pass down as hex number not as char
> string. This patch enable cmdline flow parse HEX number,
> in order to not using string which pass ASIC number.
>
> Fixes: f4d623f96119 ("app/testpmd: fix missing RSS fields in flow action")
> Cc: stable at dpdk.org
>
> Signed-off-by: Wei Zhao <wei.zhao1 at intel.com>
> ---
> app/test-pmd/cmdline_flow.c | 141 +++++++++++++++++++++++++++++++++++++++++++-
> 1 file changed, 140 insertions(+), 1 deletion(-)
>
> diff --git a/app/test-pmd/cmdline_flow.c b/app/test-pmd/cmdline_flow.c
> index 36659a6..2445731 100644
> --- a/app/test-pmd/cmdline_flow.c
> +++ b/app/test-pmd/cmdline_flow.c
> @@ -35,6 +35,7 @@ enum index {
> PREFIX,
> BOOLEAN,
> STRING,
> + HEX,
> MAC_ADDR,
> IPV4_ADDR,
> IPV6_ADDR,
> @@ -1122,6 +1123,9 @@ static int parse_boolean(struct context *, const struct token *,
> static int parse_string(struct context *, const struct token *,
> const char *, unsigned int,
> void *, unsigned int);
> +static int parse_hex(struct context *ctx, const struct token *token,
> + const char *str, unsigned int len,
> + void *buf, unsigned int size);
> static int parse_mac_addr(struct context *, const struct token *,
> const char *, unsigned int,
> void *, unsigned int);
> @@ -1198,6 +1202,13 @@ static const struct token token_list[] = {
> .call = parse_string,
> .comp = comp_none,
> },
> + [HEX] = {
> + .name = "{hex}",
> + .type = "HEX",
> + .help = "fixed string",
> + .call = parse_hex,
> + .comp = comp_none,
> + },
> [MAC_ADDR] = {
> .name = "{MAC address}",
> .type = "MAC-48",
> @@ -1544,7 +1555,7 @@ static const struct token token_list[] = {
> .name = "pattern",
> .help = "byte string to look for",
> .next = NEXT(item_raw,
> - NEXT_ENTRY(STRING),
> + NEXT_ENTRY(HEX),
> NEXT_ENTRY(ITEM_PARAM_IS,
> ITEM_PARAM_SPEC,
> ITEM_PARAM_MASK)),
> @@ -4475,6 +4486,134 @@ parse_string(struct context *ctx, const struct token *token,
> return -1;
> }
>
> +static uint32_t
> +get_hex_val(char c)
> +{
> + switch (c) {
> + case '0': case '1': case '2': case '3': case '4': case '5':
> + case '6': case '7': case '8': case '9':
> + return c - '0';
> + case 'A': case 'B': case 'C': case 'D': case 'E': case 'F':
> + return c - 'A' + 10;
> + case 'a': case 'b': case 'c': case 'd': case 'e': case 'f':
> + return c - 'a' + 10;
> + default:
> + return 0;
> + }
> +}
> +
> +static int
> +parse_hex_string(const char *src, uint8_t *dst, uint32_t *size)
> +{
> + const char *c;
> + uint32_t i;
> +
> + /* Check input parameters */
> + if ((src == NULL) ||
> + (dst == NULL) ||
> + (size == NULL) ||
> + (*size == 0))
> + return -1;
> + if ((*size & 1) != 0)
> + return -1;
> +
> + for (c = src, i = 0; i < *size; c++, i++) {
> + if ((((*c) >= '0') && ((*c) <= '9')) ||
> + (((*c) >= 'A') && ((*c) <= 'F')) ||
> + (((*c) >= 'a') && ((*c) <= 'f')))
> + continue;
> +
> + return -1;
> + }
> + *size = *size / 2;
> +
> + /* Convert chars to bytes */
> + for (i = 0; i < *size; i++)
> + dst[i] = get_hex_val(src[2 * i]) * 16 +
> + get_hex_val(src[2 * i + 1]);
> +
> + return 0;
> +}
What's wrong with strtoul() and friends?
Why you need to write your own version?
Konstantin
> +
> +static int
> +parse_hex(struct context *ctx, const struct token *token,
> + const char *str, unsigned int len,
> + void *buf, unsigned int size)
> +{
> + const struct arg *arg_data = pop_args(ctx);
> + const struct arg *arg_len = pop_args(ctx);
> + const struct arg *arg_addr = pop_args(ctx);
> + char tmp[16]; /* Ought to be enough. */
> + int ret;
> + unsigned int hexlen = len;
> + uint8_t hex_tmp[16];
> +
> + /* Arguments are expected. */
> + if (!arg_data)
> + return -1;
> + if (!arg_len) {
> + push_args(ctx, arg_data);
> + return -1;
> + }
> + if (!arg_addr) {
> + push_args(ctx, arg_len);
> + push_args(ctx, arg_data);
> + return -1;
> + }
> + size = arg_data->size;
> + /* Bit-mask fill is not supported. */
> + if (arg_data->mask || size < len)
> + goto error;
> + if (!ctx->object)
> + return len;
> +
> + /* translate bytes string to array. */
> + if (str[0] == '0' && ((str[1] == 'x') ||
> + (str[1] == 'X'))) {
> + str += 2;
> + hexlen -= 2;
> + }
> + parse_hex_string(str, hex_tmp, &hexlen);
> + /* Let parse_int() fill length information first. */
> + ret = snprintf(tmp, sizeof(tmp), "%u", hexlen);
> + if (ret < 0)
> + goto error;
> + push_args(ctx, arg_len);
> + ret = parse_int(ctx, token, tmp, ret, NULL, 0);
> + if (ret < 0) {
> + pop_args(ctx);
> + goto error;
> + }
> + buf = (uint8_t *)ctx->object + arg_data->offset;
> + /* Output buffer is not necessarily NUL-terminated. */
> + memcpy(buf, hex_tmp, hexlen);
> + memset((uint8_t *)buf + len, 0x00, size - hexlen);
> + if (ctx->objmask)
> + memset((uint8_t *)ctx->objmask + arg_data->offset,
> + 0xff, hexlen);
> + /* Save address if requested. */
> + if (arg_addr->size) {
> + memcpy((uint8_t *)ctx->object + arg_addr->offset,
> + (void *[]){
> + (uint8_t *)ctx->object + arg_data->offset
> + },
> + arg_addr->size);
> + if (ctx->objmask)
> + memcpy((uint8_t *)ctx->objmask + arg_addr->offset,
> + (void *[]){
> + (uint8_t *)ctx->objmask + arg_data->offset
> + },
> + arg_addr->size);
> + }
> + return len;
> +error:
> + push_args(ctx, arg_addr);
> + push_args(ctx, arg_len);
> + push_args(ctx, arg_data);
> + return -1;
> +
> +}
> +
> /**
> * Parse a MAC address.
> *
> --
> 2.7.5
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