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: sta...@dpdk.org
> 
> Signed-off-by: Wei Zhao <wei.zh...@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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