examples/ip_pipeline/parser.c

/* SPDX-License-Identifier: BSD-3-Clause
 * Copyright(c) 2016 Intel Corporation.
 * Copyright (c) 2009, Olivier MATZ <zer0@droids-corp.org>
 * All rights reserved.
 */

#include <stdint.h>
#include <stdlib.h>
#include <stdio.h>
#include <ctype.h>
#include <getopt.h>
#include <errno.h>
#include <stdarg.h>
#include <string.h>
#include <libgen.h>
#include <unistd.h>
#include <sys/wait.h>
#include <arpa/inet.h>
#include <sys/socket.h>

#include <rte_errno.h>
#include <rte_string_fns.h>

#include "parser.h"

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;
    }
}

int
parser_read_arg_bool(const char *p)
{
    p = skip_white_spaces(p);
    int result = -EINVAL;

    if (((p[0] == 'y') && (p[1] == 'e') && (p[2] == 's')) ||
        ((p[0] == 'Y') && (p[1] == 'E') && (p[2] == 'S'))) {
        p += 3;
        result = 1;
    }

    if (((p[0] == 'o') && (p[1] == 'n')) ||
        ((p[0] == 'O') && (p[1] == 'N'))) {
        p += 2;
        result = 1;
    }

    if (((p[0] == 'n') && (p[1] == 'o')) ||
        ((p[0] == 'N') && (p[1] == 'O'))) {
        p += 2;
        result = 0;
    }

    if (((p[0] == 'o') && (p[1] == 'f') && (p[2] == 'f')) ||
        ((p[0] == 'O') && (p[1] == 'F') && (p[2] == 'F'))) {
        p += 3;
        result = 0;
    }

    p = skip_white_spaces(p);

    if (p[0] != '\0')
        return -EINVAL;

    return result;
}

int
parser_read_uint64(uint64_t *value, const char *p)
{
    char *next;
    uint64_t val;

    p = skip_white_spaces(p);
    if (!isdigit(*p))
        return -EINVAL;

    val = strtoul(p, &next, 10);
    if (p == next)
        return -EINVAL;

    p = next;
    switch (*p) {
    case 'T':
        val *= 1024ULL;
        /* fall through */
    case 'G':
        val *= 1024ULL;
        /* fall through */
    case 'M':
        val *= 1024ULL;
        /* fall through */
    case 'k':
    case 'K':
        val *= 1024ULL;
        p++;
        break;
    }

    p = skip_white_spaces(p);
    if (*p != '\0')
        return -EINVAL;

    *value = val;
    return 0;
}

int
parser_read_uint64_hex(uint64_t *value, const char *p)
{
    char *next;
    uint64_t val;

    p = skip_white_spaces(p);

    val = strtoul(p, &next, 16);
    if (p == next)
        return -EINVAL;

    p = skip_white_spaces(next);
    if (*p != '\0')
        return -EINVAL;

    *value = val;
    return 0;
}

int
parser_read_uint32(uint32_t *value, const char *p)
{
    uint64_t val = 0;
    int ret = parser_read_uint64(&val, p);

    if (ret < 0)
        return ret;

    if (val > UINT32_MAX)
        return -ERANGE;

    *value = val;
    return 0;
}

int
parser_read_uint32_hex(uint32_t *value, const char *p)
{
    uint64_t val = 0;
    int ret = parser_read_uint64_hex(&val, p);

    if (ret < 0)
        return ret;

    if (val > UINT32_MAX)
        return -ERANGE;

    *value = val;
    return 0;
}

int
parser_read_uint16(uint16_t *value, const char *p)
{
    uint64_t val = 0;
    int ret = parser_read_uint64(&val, p);

    if (ret < 0)
        return ret;

    if (val > UINT16_MAX)
        return -ERANGE;

    *value = val;
    return 0;
}

int
parser_read_uint16_hex(uint16_t *value, const char *p)
{
    uint64_t val = 0;
    int ret = parser_read_uint64_hex(&val, p);

    if (ret < 0)
        return ret;

    if (val > UINT16_MAX)
        return -ERANGE;

    *value = val;
    return 0;
}

int
parser_read_uint8(uint8_t *value, const char *p)
{
    uint64_t val = 0;
    int ret = parser_read_uint64(&val, p);

    if (ret < 0)
        return ret;

    if (val > UINT8_MAX)
        return -ERANGE;

    *value = val;
    return 0;
}

int
parser_read_uint8_hex(uint8_t *value, const char *p)
{
    uint64_t val = 0;
    int ret = parser_read_uint64_hex(&val, p);

    if (ret < 0)
        return ret;

    if (val > UINT8_MAX)
        return -ERANGE;

    *value = val;
    return 0;
}

int
parse_tokenize_string(char *string, char *tokens[], uint32_t *n_tokens)
{
    uint32_t i;

    if ((string == NULL) ||
        (tokens == NULL) ||
        (*n_tokens < 1))
        return -EINVAL;

    for (i = 0; i < *n_tokens; i++) {
        tokens[i] = strtok_r(string, PARSE_DELIMITER, &string);
        if (tokens[i] == NULL)
            break;
    }

    if ((i == *n_tokens) &&
        (NULL != strtok_r(string, PARSE_DELIMITER, &string)))
        return -E2BIG;

    *n_tokens = i;
    return 0;
}

int
parse_hex_string(char *src, uint8_t *dst, uint32_t *size)
{
    char *c;
    uint32_t len, i;

    /* Check input parameters */
    if ((src == NULL) ||
        (dst == NULL) ||
        (size == NULL) ||
        (*size == 0))
        return -1;

    len = strlen(src);
    if (((len & 3) != 0) ||
        (len > (*size) * 2))
        return -1;
    *size = len / 2;

    for (c = src; *c != 0; c++) {
        if ((((*c) >= '0') && ((*c) <= '9')) ||
            (((*c) >= 'A') && ((*c) <= 'F')) ||
            (((*c) >= 'a') && ((*c) <= 'f')))
            continue;

        return -1;
    }

    /* 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;
}

int
parse_mpls_labels(char *string, uint32_t *labels, uint32_t *n_labels)
{
    uint32_t n_max_labels = *n_labels, count = 0;

    /* Check for void list of labels */
    if (strcmp(string, "<void>") == 0) {
        *n_labels = 0;
        return 0;
    }

    /* At least one label should be present */
    for ( ; (*string != '\0'); ) {
        char *next;
        int value;

        if (count >= n_max_labels)
            return -1;

        if (count > 0) {
            if (string[0] != ':')
                return -1;

            string++;
        }

        value = strtol(string, &next, 10);
        if (next == string)
            return -1;
        string = next;

        labels[count++] = (uint32_t) value;
    }

    *n_labels = count;
    return 0;
}

static struct rte_ether_addr *
my_ether_aton(const char *a)
{
    int i;
    char *end;
    unsigned long o[RTE_ETHER_ADDR_LEN];
    static struct rte_ether_addr ether_addr;

    i = 0;
    do {
        errno = 0;
        o[i] = strtoul(a, &end, 16);
        if (errno != 0 || end == a || (end[0] != ':' && end[0] != 0))
            return NULL;
        a = end + 1;
    } while (++i != RTE_DIM(o) && end[0] != 0);

    /* Junk at the end of line */
    if (end[0] != 0)
        return NULL;

    /* Support the format XX:XX:XX:XX:XX:XX */
    if (i == RTE_ETHER_ADDR_LEN) {
        while (i-- != 0) {
            if (o[i] > UINT8_MAX)
                return NULL;
            ether_addr.addr_bytes[i] = (uint8_t)o[i];
        }
    /* Support the format XXXX:XXXX:XXXX */
    } else if (i == RTE_ETHER_ADDR_LEN / 2) {
        while (i-- != 0) {
            if (o[i] > UINT16_MAX)
                return NULL;
            ether_addr.addr_bytes[i * 2] = (uint8_t)(o[i] >> 8);
            ether_addr.addr_bytes[i * 2 + 1] = (uint8_t)(o[i] & 0xff);
        }
    /* unknown format */
    } else
        return NULL;

    return (struct rte_ether_addr *)&ether_addr;
}

int
parse_ipv4_addr(const char *token, struct in_addr *ipv4)
{
    if (strlen(token) >= INET_ADDRSTRLEN)
        return -EINVAL;

    if (inet_pton(AF_INET, token, ipv4) != 1)
        return -EINVAL;

    return 0;
}

int
parse_ipv6_addr(const char *token, struct in6_addr *ipv6)
{
    if (strlen(token) >= INET6_ADDRSTRLEN)
        return -EINVAL;

    if (inet_pton(AF_INET6, token, ipv6) != 1)
        return -EINVAL;

    return 0;
}

int
parse_mac_addr(const char *token, struct rte_ether_addr *addr)
{
    struct rte_ether_addr *tmp;

    tmp = my_ether_aton(token);
    if (tmp == NULL)
        return -1;

    memcpy(addr, tmp, sizeof(struct rte_ether_addr));
    return 0;
}

int
parse_cpu_core(const char *entry,
    struct cpu_core_params *p)
{
    size_t num_len;
    char num[8];

    uint32_t s = 0, c = 0, h = 0, val;
    uint8_t s_parsed = 0, c_parsed = 0, h_parsed = 0;
    const char *next = skip_white_spaces(entry);
    char type;

    if (p == NULL)
        return -EINVAL;

    /* Expect <CORE> or [sX][cY][h]. At least one parameter is required. */
    while (*next != '\0') {
        /* If everything parsed nothing should left */
        if (s_parsed && c_parsed && h_parsed)
            return -EINVAL;

        type = *next;
        switch (type) {
        case 's':
        case 'S':
            if (s_parsed || c_parsed || h_parsed)
                return -EINVAL;
            s_parsed = 1;
            next++;
            break;
        case 'c':
        case 'C':
            if (c_parsed || h_parsed)
                return -EINVAL;
            c_parsed = 1;
            next++;
            break;
        case 'h':
        case 'H':
            if (h_parsed)
                return -EINVAL;
            h_parsed = 1;
            next++;
            break;
        default:
            /* If it start from digit it must be only core id. */
            if (!isdigit(*next) || s_parsed || c_parsed || h_parsed)
                return -EINVAL;

            type = 'C';
        }

        for (num_len = 0; *next != '\0'; next++, num_len++) {
            if (num_len == RTE_DIM(num))
                return -EINVAL;

            if (!isdigit(*next))
                break;

            num[num_len] = *next;
        }

        if (num_len == 0 && type != 'h' && type != 'H')
            return -EINVAL;

        if (num_len != 0 && (type == 'h' || type == 'H'))
            return -EINVAL;

        num[num_len] = '\0';
        val = strtol(num, NULL, 10);

        h = 0;
        switch (type) {
        case 's':
        case 'S':
            s = val;
            break;
        case 'c':
        case 'C':
            c = val;
            break;
        case 'h':
        case 'H':
            h = 1;
            break;
        }
    }

    p->socket_id = s;
    p->core_id = c;
    p->thread_id = h;
    return 0;
}