/src/kamailio/src/core/parser/parse_uri.c

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/*
 * Copyright (C) 2001-2003 FhG Fokus
 *
 * This file is part of Kamailio, a free SIP server.
 *
 * Kamailio is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version
 *
 * Kamailio is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 *
 */

/** @file
 * @brief Parser :: Parse URI's
 *
 * @ingroup parser
 */


#include <stdint.h>

#include "../globals.h"
#include "parse_uri.h"
#include <string.h>
#include "../dprint.h"
#include "../ut.h" /* q_memchr */
#include "../error.h"
#include "../core_stats.h"

static char _sr_uri_empty_buf[2] = {0};
static str _sr_uri_empty = {_sr_uri_empty_buf, 0};

/* extra chars that should be allowed in URI host */
char *_sr_uri_host_extra_chars = "";

int uri_host_char_allowed(char c)
{
  int i = 0;

  if(_sr_uri_host_extra_chars == NULL
      || _sr_uri_host_extra_chars[0] == '\0') {
    return 0;
  }
  while(_sr_uri_host_extra_chars[i] != '\0') {
    if(_sr_uri_host_extra_chars[i] == c) {
      return 1;
    }
    i++;
  }
  return 0;
}

/* buf= pointer to beginning of uri (sip:x@foo.bar:5060;a=b?h=i)
 * len= len of uri
 * returns: fills uri & returns <0 on error or 0 if ok
 */
int parse_uri(char *buf, int len, struct sip_uri *uri)
{
  enum states
  {
    URI_INIT,
    URI_USER,
    URI_PASSWORD,
    URI_PASSWORD_ALPHA,
    URI_HOST,
    URI_HOST_P,
    URI_HOST6_P,
    URI_HOST6_END,
    URI_PORT,
    URI_PARAM,
    URI_PARAM_P,
    URI_VAL_P,
    URI_HEADERS,
    /* param states */
    /* transport */
    PT_T,
    PT_R,
    PT_A,
    PT_N,
    PT_S,
    PT_P,
    PT_O,
    PT_R2,
    PT_T2,
    PT_eq,
    /* ttl */
    PTTL_T2,
    PTTL_L,
    PTTL_eq,
    /* user */
    PU_U,
    PU_S,
    PU_E,
    PU_R,
    PU_eq,
    /* method */
    PM_M,
    PM_E,
    PM_T,
    PM_H,
    PM_O,
    PM_D,
    PM_eq,
    /* maddr */
    PMA_A,
    PMA_D,
    PMA_D2,
    PMA_R,
    PMA_eq,
    /* lr */
    PLR_L,
    PLR_R_FIN,
    PLR_eq,
    /* r2 */
    PR2_R,
    PR2_2_FIN,
    PR2_eq,
    /* gr */
    PGR_G,
    PGR_R_FIN,
    PGR_eq,
#ifdef USE_COMP
    /* comp */
    PCOMP_C,
    PCOMP_O,
    PCOMP_M,
    PCOMP_P,
    PCOMP_eq,

    /* comp values */
    /* sigcomp */
    VCOMP_S,
    VCOMP_SIGC_I,
    VCOMP_SIGC_G,
    VCOMP_SIGC_C,
    VCOMP_SIGC_O,
    VCOMP_SIGC_M,
    VCOMP_SIGC_P_FIN,
    /* sergz */
    VCOMP_SGZ_E,
    VCOMP_SGZ_R,
    VCOMP_SGZ_G,
    VCOMP_SGZ_Z_FIN,
#endif

    /* transport values */
    /* udp */
    VU_U,
    VU_D,
    VU_P_FIN,
    /* tcp */
    VT_T,
    VT_C,
    VT_P_FIN,
    /* tls */
    VTLS_L,
    VTLS_S_FIN,
    /* sctp */
    VS_S,
    VS_C,
    VS_T,
    VS_P_FIN,
    /* ws */
    VW_W,
    VW_S_FIN
  };
  register enum states state;
  char *s;
  char *b;    /* param start */
  char *v;    /* value start */
  str *param;   /* current param */
  str *param_val; /* current param val */
  str user;
  str password;
  int port_no;
  register char *p;
  char *end;
  char *pass;
  int found_user;
  int error_headers;
  uint32_t scheme;
  uri_type backup_urit;
  uri_flags backup_urif;

#ifdef USE_COMP
  str comp_str; /* not returned for now */
  str comp_val; /* not returned for now */
#endif

#define SIP_SCH 0x3a706973
#define SIPS_SCH 0x73706973
#define TEL_SCH 0x3a6c6574
#define URN_SCH 0x3a6e7275

#define case_port(ch, var)           \
  case ch:                         \
    (var) = (var)*10 + ch - '0'; \
    if((var) > MAX_PORT_VAL) {   \
      goto error_bad_port;     \
    }                            \
    break

#define still_at_user                                      \
  if(found_user == 0) {                                  \
    user.s = uri->host.s;                              \
    if(pass) {                                         \
      user.len = pass - user.s;                      \
      password.s = pass + 1;                         \
      password.len = p - password.s;                 \
    } else {                                           \
      user.len = p - user.s;                         \
    }                                                  \
    /* save the uri type/scheme */                     \
    backup_urit = uri->type;                           \
    backup_urif = uri->flags;                          \
    /* everything else is 0 */                         \
    memset(uri, 0, sizeof(struct sip_uri));            \
    /* restore the scheme & flags, copy user & pass */ \
    uri->type = backup_urit;                           \
    uri->flags = backup_urif;                          \
    uri->user = user;                                  \
    if(pass)                                           \
      uri->passwd = password;                        \
    s = p + 1;                                         \
    found_user = 1;                                    \
    error_headers = 0;                                 \
    state = URI_HOST;                                  \
  } else                                                 \
    goto error_bad_char

#define check_host_end         \
  case ':':                  \
    /* found the host */   \
    uri->host.s = s;       \
    uri->host.len = p - s; \
    state = URI_PORT;      \
    s = p + 1;             \
    break;                 \
  case ';':                  \
    uri->host.s = s;       \
    uri->host.len = p - s; \
    state = URI_PARAM;     \
    s = p + 1;             \
    break;                 \
  case '?':                  \
    uri->host.s = s;       \
    uri->host.len = p - s; \
    state = URI_HEADERS;   \
    s = p + 1;             \
    break;                 \
  case '&':                  \
  case '@':                  \
    goto error_bad_char


#define param_set(t_start, v_start) \
  param->s = (t_start);           \
  param->len = (p - (t_start));   \
  param_val->s = (v_start);       \
  param_val->len = (p - (v_start))

#define semicolon_case                                            \
  case ';':                                                     \
    if(pass) {                                                \
      found_user = 1; /* no user, pass cannot contain ';'*/ \
      pass = 0;                                             \
    }                                                         \
    state = URI_PARAM /* new param */

#define question_case                                             \
  case '?':                                                     \
    uri->params.s = s;                                        \
    uri->params.len = p - s;                                  \
    state = URI_HEADERS;                                      \
    s = p + 1;                                                \
    if(pass) {                                                \
      found_user = 1; /* no user, pass cannot contain '?'*/ \
      pass = 0;                                             \
    }

#define colon_case                                           \
  case ':':                                                \
    if(found_user == 0) {                                \
      /*might be pass but only if user not found yet*/ \
      if(pass) {                                       \
        found_user = 1; /* no user */                \
        pass = 0;                                    \
      } else {                                         \
        pass = p;                                    \
      }                                                \
    }                                                    \
    state = URI_PARAM_P /* generic param */

#define param_common_cases                  \
  case '@':                               \
    /* ughhh, this is still the user */ \
    still_at_user;                      \
    break;                              \
    semicolon_case;                     \
    break;                              \
    question_case;                      \
    break;                              \
    colon_case;                         \
    break

#define value_common_cases                  \
  case '@':                               \
    /* ughhh, this is still the user */ \
    still_at_user;                      \
    break;                              \
    semicolon_case;                     \
    param_set(b, v);                    \
    break;                              \
    question_case;                      \
    param_set(b, v);                    \
    break;                              \
    colon_case;                         \
    state = URI_VAL_P;                  \
    break

#define param_switch(old_state, c1, c2, new_state) \
  case old_state:                                \
    switch(*p) {                               \
      case c1:                               \
      case c2:                               \
        state = (new_state);               \
        break;                             \
        param_common_cases;                \
      default:                               \
        state = URI_PARAM_P;               \
    }                                          \
    break
#define param_switch1(old_state, c1, new_state) \
  case old_state:                             \
    switch(*p) {                            \
      case c1:                            \
        state = (new_state);            \
        break;                          \
        param_common_cases;             \
      default:                            \
        state = URI_PARAM_P;            \
    }                                       \
    break
#define param_switch_big(old_state, c1, c2, d1, d2, new_state_c, new_state_d) \
  case old_state:                                                           \
    switch(*p) {                                                          \
      case c1:                                                          \
      case c2:                                                          \
        state = (new_state_c);                                        \
        break;                                                        \
      case d1:                                                          \
      case d2:                                                          \
        state = (new_state_d);                                        \
        break;                                                        \
        param_common_cases;                                           \
      default:                                                          \
        state = URI_PARAM_P;                                          \
    }                                                                     \
    break
#define value_switch(old_state, c1, c2, new_state) \
  case old_state:                                \
    switch(*p) {                               \
      case c1:                               \
      case c2:                               \
        state = (new_state);               \
        break;                             \
        value_common_cases;                \
      default:                               \
        state = URI_VAL_P;                 \
    }                                          \
    break
#define value_switch_big(old_state, c1, c2, d1, d2, new_state_c, new_state_d) \
  case old_state:                                                           \
    switch(*p) {                                                          \
      case c1:                                                          \
      case c2:                                                          \
        state = (new_state_c);                                        \
        break;                                                        \
      case d1:                                                          \
      case d2:                                                          \
        state = (new_state_d);                                        \
        break;                                                        \
        value_common_cases;                                           \
      default:                                                          \
        state = URI_VAL_P;                                            \
    }                                                                     \
    break

#define transport_fin(c_state, proto_no) \
  case c_state:                        \
    switch(*p) {                     \
      case '@':                    \
        still_at_user;           \
        break;                   \
        semicolon_case;          \
        param_set(b, v);         \
        uri->proto = (proto_no); \
        break;                   \
        question_case;           \
        param_set(b, v);         \
        uri->proto = (proto_no); \
        break;                   \
        colon_case;              \
      default:                     \
        state = URI_VAL_P;       \
        break;                   \
    }                                \
    break


#ifdef USE_COMP
#define comp_fin(c_state, comp_no)     \
  case c_state:                      \
    switch(*p) {                   \
      case '@':                  \
        still_at_user;         \
        break;                 \
        semicolon_case;        \
        /* param_set(b, v); */ \
        uri->comp = (comp_no); \
        break;                 \
        question_case;         \
        /* param_set(b, v) */; \
        uri->comp = (comp_no); \
        break;                 \
        colon_case;            \
      default:                   \
        state = URI_VAL_P;     \
        break;                 \
    }                              \
    break

#endif

  /* init */
  end = buf + len;
  p = buf + 4;
  found_user = 0;
  error_headers = 0;
  b = v = 0;
  param = param_val = 0;
  pass = 0;
  password.s = 0; /* fixes gcc 4.0 warning */
  password.len = 0;
  port_no = 0;
  state = URI_INIT;
  memset(uri, 0, sizeof(struct sip_uri)); /* zero it all, just to be sure*/
  /*look for sip:, sips:, tel: or urn:*/
  if(len < 5)
    goto error_too_short;
  scheme = ((uint32_t)buf[0]) + (((uint32_t)buf[1]) << 8)
       + (((uint32_t)buf[2]) << 16) + (((uint32_t)buf[3]) << 24);
  scheme |= 0x20202020;
  if(scheme == SIP_SCH) {
    uri->type = SIP_URI_T;
  } else if(scheme == SIPS_SCH) {
    if(buf[4] == ':') {
      p++;
      uri->type = SIPS_URI_T;
    } else
      goto error_bad_uri;
  } else if(scheme == TEL_SCH) {
    uri->type = TEL_URI_T;
  } else if(scheme == URN_SCH) {
    uri->type = URN_URI_T;
  } else
    goto error_bad_uri;

  s = p;
  for(; p < end; p++) {
    switch((unsigned char)state) {
      case URI_INIT:
        switch(*p) {
          case '[':
            /* uri =  [ipv6address]... */
            state = URI_HOST6_P;
            s = p;
            break;
          case ']':
            /* invalid, no uri can start with ']' */
          case ':':
            /* the same as above for ':' */
            goto error_bad_char;
          case '@': /* error no user part, or
                * be forgiving and accept it ? */
          default:
            state = URI_USER;
        }
        break;
      case URI_USER:
        switch(*p) {
          case '@':
            /* found the user*/
            uri->user.s = s;
            uri->user.len = p - s;
            if(uri->user.len <= 0) {
              /* at '@' and no user part */
              goto error_bad_char;
            }
            state = URI_HOST;
            found_user = 1;
            s = p + 1; /* skip '@' */
            break;
          case ':':
            /* found the user, or the host? */
            uri->user.s = s;
            uri->user.len = p - s;
            state = URI_PASSWORD;
            s = p + 1; /* skip ':' */
            break;
          case ';':
            /* this could be still the user or
             * params?*/
            uri->host.s = s;
            uri->host.len = p - s;
            state = URI_PARAM;
            s = p + 1;
            break;
          case '?': /* still user or headers? */
            uri->host.s = s;
            uri->host.len = p - s;
            state = URI_HEADERS;
            s = p + 1;
            break;
            /* almost anything permitted in the user part */
          case '.':
          case '-':
          case '(':
          case ')':
            /* tel uri visual separators, set flag meaning, that
             * user should be normalized before usage
             */
            uri->flags |= URI_USER_NORMALIZE;
            break;
          case '[':
          case ']': /* the user part cannot contain "[]" */
            goto error_bad_char;
        }
        break;
      case URI_PASSWORD: /* this can also be the port (missing user)*/
        switch(*p) {
          case '@':
            /* found the password*/
            uri->passwd.s = s;
            uri->passwd.len = p - s;
            port_no = 0;
            state = URI_HOST;
            found_user = 1;
            s = p + 1; /* skip '@' */
            break;
          case ';':
            /* upps this is the port */
            uri->port.s = s;
            uri->port.len = p - s;
            uri->port_no = port_no;
            /* user contains in fact the host */
            uri->host.s = uri->user.s;
            uri->host.len = uri->user.len;
            uri->user.s = 0;
            uri->user.len = 0;
            state = URI_PARAM;
            found_user = 1; /*  there is no user part */
            s = p + 1;
            break;
          case '?':
            /* upps this is the port */
            uri->port.s = s;
            uri->port.len = p - s;
            uri->port_no = port_no;
            /* user contains in fact the host */
            uri->host.s = uri->user.s;
            uri->host.len = uri->user.len;
            uri->user.s = 0;
            uri->user.len = 0;
            state = URI_HEADERS;
            found_user = 1; /*  there is no user part */
            s = p + 1;
            break;
            case_port('0', port_no);
            case_port('1', port_no);
            case_port('2', port_no);
            case_port('3', port_no);
            case_port('4', port_no);
            case_port('5', port_no);
            case_port('6', port_no);
            case_port('7', port_no);
            case_port('8', port_no);
            case_port('9', port_no);
          case '[':
          case ']':
          case ':':
            goto error_bad_char;
          default:
            /* it can't be the port, non number found */
            port_no = 0;
            state = URI_PASSWORD_ALPHA;
        }
        break;
      case URI_PASSWORD_ALPHA:
        switch(*p) {
          case '@':
            /* found the password*/
            uri->passwd.s = s;
            uri->passwd.len = p - s;
            state = URI_HOST;
            found_user = 1;
            s = p + 1; /* skip '@' */
            break;
          case ';': /* contains non-numbers => cannot be port no*/
          case '?':
            goto error_bad_port;
          case '[':
          case ']':
          case ':':
            goto error_bad_char;
        }
        break;
      case URI_HOST:
        if(*p == '[') {
          state = URI_HOST6_P;
        } else {
          if(isalnum(*p)) {
            state = URI_HOST_P;
          } else {
            goto error_bad_host;
          }
        }
        break;
      case URI_HOST_P:
        switch(*p) {
          check_host_end;
          default:
            if(!isalnum(*p) && (*p != '.') && (*p != '-')
                && !uri_host_char_allowed(*p)) {
              goto error_bad_host;
            }
        }
        break;
      case URI_HOST6_END:
        switch(*p) {
          check_host_end;
          default: /*no chars allowed after [ipv6] */
            goto error_bad_host;
        }
        break;
      case URI_HOST6_P:
        switch(*p) {
          case ']':
            state = URI_HOST6_END;
            break;
          case '[':
          case '&':
          case '@':
          case ';':
          case '?':
            goto error_bad_host;
        }
        break;
      case URI_PORT:
        switch(*p) {
          case ';':
            uri->port.s = s;
            uri->port.len = p - s;
            uri->port_no = port_no;
            state = URI_PARAM;
            s = p + 1;
            break;
          case '?':
            uri->port.s = s;
            uri->port.len = p - s;
            uri->port_no = port_no;
            state = URI_HEADERS;
            s = p + 1;
            break;
            case_port('0', port_no);
            case_port('1', port_no);
            case_port('2', port_no);
            case_port('3', port_no);
            case_port('4', port_no);
            case_port('5', port_no);
            case_port('6', port_no);
            case_port('7', port_no);
            case_port('8', port_no);
            case_port('9', port_no);
          case '&':
          case '@':
          case ':':
          default:
            goto error_bad_port;
        }
        break;
      case URI_PARAM: /* beginning of a new param */
        switch(*p) {
          param_common_cases;
          /* recognized params */
          case 't':
          case 'T':
            b = p;
            state = PT_T;
            break;
          case 'u':
          case 'U':
            b = p;
            state = PU_U;
            break;
          case 'm':
          case 'M':
            b = p;
            state = PM_M;
            break;
          case 'l':
          case 'L':
            b = p;
            state = PLR_L;
            break;
          case 'r':
          case 'R':
            b = p;
            state = PR2_R;
            break;
          case 'g':
          case 'G':
            b = p;
            state = PGR_G;
            break;
#ifdef USE_COMP
          case 'c':
          case 'C':
            b = p;
            state = PCOMP_C;
            break;
#endif
          default:
            state = URI_PARAM_P;
        }
        break;
      case URI_PARAM_P: /* ignore current param */
        /* supported params:
         *  maddr, transport, ttl, lr, user, method, r2  */
        switch(*p) {
          param_common_cases;
        };
        break;
        /* ugly but fast param names parsing */
        /*transport */
        param_switch_big(PT_T, 'r', 'R', 't', 'T', PT_R, PTTL_T2);
        param_switch(PT_R, 'a', 'A', PT_A);
        param_switch(PT_A, 'n', 'N', PT_N);
        param_switch(PT_N, 's', 'S', PT_S);
        param_switch(PT_S, 'p', 'P', PT_P);
        param_switch(PT_P, 'o', 'O', PT_O);
        param_switch(PT_O, 'r', 'R', PT_R2);
        param_switch(PT_R2, 't', 'T', PT_T2);
        param_switch1(PT_T2, '=', PT_eq);
      /* value parsing */
      case PT_eq:
        param = &uri->transport;
        param_val = &uri->transport_val;
        switch(*p) {
          param_common_cases;
          case 'u':
          case 'U':
            v = p;
            state = VU_U;
            break;
          case 't':
          case 'T':
            v = p;
            state = VT_T;
            break;
          case 's':
          case 'S':
            v = p;
            state = VS_S;
            break;
          case 'w':
          case 'W':
            v = p;
            state = VW_W;
            break;
          default:
            v = p;
            state = URI_VAL_P;
        }
        break;
        /* generic value */
      case URI_VAL_P:
        switch(*p) {
          value_common_cases;
        }
        break;
        /* udp */
        value_switch(VU_U, 'd', 'D', VU_D);
        value_switch(VU_D, 'p', 'P', VU_P_FIN);
        transport_fin(VU_P_FIN, PROTO_UDP);
        /* tcp */
        value_switch_big(VT_T, 'c', 'C', 'l', 'L', VT_C, VTLS_L);
        value_switch(VT_C, 'p', 'P', VT_P_FIN);
        transport_fin(VT_P_FIN, PROTO_TCP);
        /* tls */
        value_switch(VTLS_L, 's', 'S', VTLS_S_FIN);
        transport_fin(VTLS_S_FIN, PROTO_TLS);
        /* sctp */
        value_switch(VS_S, 'c', 'C', VS_C);
        value_switch(VS_C, 't', 'T', VS_T);
        value_switch(VS_T, 'p', 'P', VS_P_FIN);
        transport_fin(VS_P_FIN, PROTO_SCTP);
        /* ws */
        value_switch(VW_W, 's', 'S', VW_S_FIN);
        transport_fin(VW_S_FIN, PROTO_WS);

        /* ttl */
        param_switch(PTTL_T2, 'l', 'L', PTTL_L);
        param_switch1(PTTL_L, '=', PTTL_eq);
      case PTTL_eq:
        param = &uri->ttl;
        param_val = &uri->ttl_val;
        switch(*p) {
          param_common_cases;
          default:
            v = p;
            state = URI_VAL_P;
        }
        break;

        /* user param */
        param_switch(PU_U, 's', 'S', PU_S);
        param_switch(PU_S, 'e', 'E', PU_E);
        param_switch(PU_E, 'r', 'R', PU_R);
        param_switch1(PU_R, '=', PU_eq);
      case PU_eq:
        param = &uri->user_param;
        param_val = &uri->user_param_val;
        switch(*p) {
          param_common_cases;
          default:
            v = p;
            state = URI_VAL_P;
        }
        break;

        /* method*/
        param_switch_big(PM_M, 'e', 'E', 'a', 'A', PM_E, PMA_A);
        param_switch(PM_E, 't', 'T', PM_T);
        param_switch(PM_T, 'h', 'H', PM_H);
        param_switch(PM_H, 'o', 'O', PM_O);
        param_switch(PM_O, 'd', 'D', PM_D);
        param_switch1(PM_D, '=', PM_eq);
      case PM_eq:
        param = &uri->method;
        param_val = &uri->method_val;
        switch(*p) {
          param_common_cases;
          default:
            v = p;
            state = URI_VAL_P;
        }
        break;

        /*maddr*/
        param_switch(PMA_A, 'd', 'D', PMA_D);
        param_switch(PMA_D, 'd', 'D', PMA_D2);
        param_switch(PMA_D2, 'r', 'R', PMA_R);
        param_switch1(PMA_R, '=', PMA_eq);
      case PMA_eq:
        param = &uri->maddr;
        param_val = &uri->maddr_val;
        switch(*p) {
          param_common_cases;
          default:
            v = p;
            state = URI_VAL_P;
        }
        break;

        /* lr */
        param_switch(PLR_L, 'r', 'R', PLR_R_FIN);
      case PLR_R_FIN:
        switch(*p) {
          case '@':
            still_at_user;
            break;
          case '=':
            state = PLR_eq;
            break;
            semicolon_case;
            uri->lr.s = b;
            uri->lr.len = (p - b);
            break;
            question_case;
            uri->lr.s = b;
            uri->lr.len = (p - b);
            break;
            colon_case;
            break;
          default:
            state = URI_PARAM_P;
        }
        break;
        /* handle lr=something case */
      case PLR_eq:
        param = &uri->lr;
        param_val = &uri->lr_val;
        switch(*p) {
          param_common_cases;
          default:
            v = p;
            state = URI_VAL_P;
        }
        break;
        /* r2 */
        param_switch1(PR2_R, '2', PR2_2_FIN);
      case PR2_2_FIN:
        switch(*p) {
          case '@':
            still_at_user;
            break;
          case '=':
            state = PR2_eq;
            break;
            semicolon_case;
            uri->r2.s = b;
            uri->r2.len = (p - b);
            break;
            question_case;
            uri->r2.s = b;
            uri->r2.len = (p - b);
            break;
            colon_case;
            break;
          default:
            state = URI_PARAM_P;
        }
        break;
        /* handle lr=something case */
      case PR2_eq:
        param = &uri->r2;
        param_val = &uri->r2_val;
        switch(*p) {
          param_common_cases;
          default:
            v = p;
            state = URI_VAL_P;
        }
        break;
        /* gr */
        param_switch(PGR_G, 'r', 'R', PGR_R_FIN);
      case PGR_R_FIN:
        switch(*p) {
          case '@':
            still_at_user;
            break;
          case '=':
            state = PGR_eq;
            break;
            semicolon_case;
            uri->gr.s = b;
            uri->gr.len = (p - b);
            break;
            question_case;
            uri->gr.s = b;
            uri->gr.len = (p - b);
            break;
            colon_case;
            break;
          default:
            state = URI_PARAM_P;
        }
        break;
        /* handle gr=something case */
      case PGR_eq:
        param = &uri->gr;
        param_val = &uri->gr_val;
        switch(*p) {
          param_common_cases;
          default:
            v = p;
            state = URI_VAL_P;
        }
        break;

#ifdef USE_COMP
        param_switch(PCOMP_C, 'o', 'O', PCOMP_O);
        param_switch(PCOMP_O, 'm', 'M', PCOMP_M);
        param_switch(PCOMP_M, 'p', 'P', PCOMP_P);
        param_switch1(PCOMP_P, '=', PCOMP_eq);
      /* value */
      case PCOMP_eq:
        param = &comp_str;
        param_val = &comp_val;
        switch(*p) {
          param_common_cases;
          case 's':
          case 'S':
            v = p;
            state = VCOMP_S;
            break;
          default:
            v = p;
            state = URI_VAL_P;
        }
        break;
        /* sigcomp*/
        value_switch_big(
            VCOMP_S, 'i', 'I', 'e', 'E', VCOMP_SIGC_I, VCOMP_SGZ_E);
        value_switch(VCOMP_SIGC_I, 'g', 'G', VCOMP_SIGC_G);
        value_switch(VCOMP_SIGC_G, 'c', 'C', VCOMP_SIGC_C);
        value_switch(VCOMP_SIGC_C, 'o', 'O', VCOMP_SIGC_O);
        value_switch(VCOMP_SIGC_O, 'm', 'M', VCOMP_SIGC_M);
        value_switch(VCOMP_SIGC_M, 'p', 'P', VCOMP_SIGC_P_FIN);
        comp_fin(VCOMP_SIGC_P_FIN, COMP_SIGCOMP);

        /* sergz*/
        value_switch(VCOMP_SGZ_E, 'r', 'R', VCOMP_SGZ_R);
        value_switch(VCOMP_SGZ_R, 'g', 'G', VCOMP_SGZ_G);
        value_switch(VCOMP_SGZ_G, 'z', 'Z', VCOMP_SGZ_Z_FIN);
        comp_fin(VCOMP_SGZ_Z_FIN, COMP_SERGZ);
#endif


      case URI_HEADERS:
        /* for now nobody needs them so we completely ignore the
         * headers (they are not allowed in request uri) --andrei */
        switch(*p) {
          case '@':
            /* yak, we are still at user */
            still_at_user;
            break;
          case ';':
            /* we might be still parsing user, try it */
            if(found_user)
              goto error_bad_char;
            error_headers = 1; /* if this is not the user
                      we have an error */
            /* if pass is set => it cannot be user:pass
             * => error (';') is illegal in a header */
            if(pass)
              goto error_headers;
            break;
          case ':':
            if(found_user == 0) {
              /*might be pass but only if user not found yet*/
              if(pass) {
                found_user = 1; /* no user */
                pass = 0;
              } else {
                pass = p;
              }
            }
            break;
          case '?':
            if(pass) {
              found_user =
                  1; /* no user, pass cannot contain '?'*/
              pass = 0;
            }
            break;
        }
        break;
      default:
        goto error_bug;
    }
  }
  /*end of uri */
  switch(state) {
    case URI_INIT: /* error empty uri */
      goto error_too_short;
    case URI_USER:
      /* this is the host, it can't be the user */
      if(found_user)
        goto error_bad_uri;
      uri->host.s = s;
      uri->host.len = p - s;
      state = URI_HOST;
      break;
    case URI_PASSWORD:
      /* this is the port, it can't be the passwd */
      if(found_user)
        goto error_bad_port;
      uri->port.s = s;
      uri->port.len = p - s;
      uri->port_no = port_no;
      uri->host = uri->user;
      uri->user.s = 0;
      uri->user.len = 0;
      break;
    case URI_PASSWORD_ALPHA:
      /* it might be an urn, check scheme and set host */
      if(scheme == URN_SCH) {
        uri->host.s = s;
        uri->host.len = p - s;
        LM_DBG("parsed urn scheme with host: %.*s\n", uri->host.len,
            uri->host.s);
        /* this is the port, it can't be the passwd */
      } else
        goto error_bad_port;
      break;
    case URI_HOST_P:
    case URI_HOST6_END:
      uri->host.s = s;
      uri->host.len = p - s;
      break;
    case URI_HOST:    /* error: null host */
    case URI_HOST6_P: /* error: unterminated ipv6 reference*/
      goto error_bad_host;
    case URI_PORT:
      uri->port.s = s;
      uri->port.len = p - s;
      uri->port_no = port_no;
      break;
    case URI_PARAM:
    case URI_PARAM_P:
    /* intermediate param states */
    case PT_T: /* transport */
    case PT_R:
    case PT_A:
    case PT_N:
    case PT_S:
    case PT_P:
    case PT_O:
    case PT_R2:
    case PT_T2:
    case PT_eq:   /* ignore empty transport params */
    case PTTL_T2: /* ttl */
    case PTTL_L:
    case PTTL_eq:
    case PU_U: /* user */
    case PU_S:
    case PU_E:
    case PU_R:
    case PU_eq:
    case PM_M: /* method */
    case PM_E:
    case PM_T:
    case PM_H:
    case PM_O:
    case PM_D:
    case PM_eq:
    case PLR_L: /* lr */
    case PR2_R: /* r2 */
    case PGR_G: /* gr */
#ifdef USE_COMP
    case PCOMP_C:
    case PCOMP_O:
    case PCOMP_M:
    case PCOMP_P:
    case PCOMP_eq:
#endif
      uri->params.s = s;
      uri->params.len = p - s;
      break;
    /* fin param states */
    case PLR_R_FIN:
    case PLR_eq:
      uri->params.s = s;
      uri->params.len = p - s;
      uri->lr.s = b;
      uri->lr.len = p - b;
      break;
    case PR2_2_FIN:
    case PR2_eq:
      uri->params.s = s;
      uri->params.len = p - s;
      uri->r2.s = b;
      uri->r2.len = p - b;
      break;
    case PGR_R_FIN:
    case PGR_eq:
      uri->params.s = s;
      uri->params.len = p - s;
      uri->gr.s = b;
      uri->gr.len = p - b;
      break;
    case URI_VAL_P:
    /* intermediate value states */
    case VU_U:
    case VU_D:
    case VT_T:
    case VT_C:
    case VTLS_L:
    case VS_S:
    case VS_C:
    case VS_T:
    case VW_W:
      uri->params.s = s;
      uri->params.len = p - s;
      param_set(b, v);
      break;
#ifdef USE_COMP
    case VCOMP_S:
    case VCOMP_SIGC_I:
    case VCOMP_SIGC_G:
    case VCOMP_SIGC_C:
    case VCOMP_SIGC_O:
    case VCOMP_SIGC_M:
    case VCOMP_SGZ_E:
    case VCOMP_SGZ_R:
    case VCOMP_SGZ_G:
      /* unrecognized comp method, assume none */
      uri->params.s = s;
      uri->params.len = p - s;
      /* uri->comp=COMP_NONE ; */
      break;
#endif
    /* fin value states */
    case VU_P_FIN:
      uri->params.s = s;
      uri->params.len = p - s;
      param_set(b, v);
      uri->proto = PROTO_UDP;
      break;
    case VT_P_FIN:
      uri->params.s = s;
      uri->params.len = p - s;
      param_set(b, v);
      uri->proto = PROTO_TCP;
      break;
    case VTLS_S_FIN:
      uri->params.s = s;
      uri->params.len = p - s;
      param_set(b, v);
      uri->proto = PROTO_TLS;
      break;
    case VS_P_FIN:
      uri->params.s = s;
      uri->params.len = p - s;
      param_set(b, v);
      uri->proto = PROTO_SCTP;
      break;
    case VW_S_FIN:
      uri->params.s = s;
      uri->params.len = p - s;
      param_set(b, v);
      uri->proto = PROTO_WS;
      break;
#ifdef USE_COMP
    case VCOMP_SIGC_P_FIN:
      uri->params.s = s;
      uri->params.len = p - s;
      /* param_set(b, v); */
      uri->comp = COMP_SIGCOMP;
      break;
    case VCOMP_SGZ_Z_FIN:
      uri->params.s = s;
      uri->params.len = p - s;
      /* param_set(b, v); */
      uri->comp = COMP_SERGZ;
      break;
#endif
    /* headers */
    case URI_HEADERS:
      uri->headers.s = s;
      uri->headers.len = p - s;
      if(error_headers)
        goto error_headers;
      break;
    default:
      goto error_bug;
  }
  switch(uri->type) {
    case SIPS_URI_T:
    case SIP_URI_T:
      /* save the original sip: URI parameters in sip_params */
      uri->sip_params = uri->params;
      if((phone2tel) && (uri->user_param_val.len == 5)
          && (strncmp(uri->user_param_val.s, "phone", 5) == 0)) {
        uri->type = TEL_URI_T;
        uri->flags |= URI_SIP_USER_PHONE;
        /* move params from user into uri->params */
        p = q_memchr(uri->user.s, ';', uri->user.len);
        if(p) {
          /* NOTE:
           * specialized uri params (user, maddr, etc.) still hold
           * the values from the sip-uri envelope
           * while uri->params point to the params in the embedded tel uri
           */
          uri->params.s = p + 1;
          uri->params.len =
              uri->user.s + uri->user.len - uri->params.s;
          uri->user.len = p - uri->user.s;
        } else {
          uri->params.s = 0;
          uri->params.len = 0;
        }
      } else {
        uri->flags &= ~URI_USER_NORMALIZE;
      }
      break;
    case TEL_URI_T:
    case TELS_URI_T:
      /* fix tel uris, move the number in uri and empty the host */
      uri->user = uri->host;
      uri->host = _sr_uri_empty;
      break;
    /* urn: do nothing */
    case URN_URI_T:
      break;
    case ERROR_URI_T:
      LM_ERR("parse uri unexpected error (BUG?)\n");
      goto error_bad_uri;
      break; /* do nothing, avoids a compilation warning */
  }

  /* common sanity checks */
  if(uri->port.len > 5) {
    /* port value too large */
    goto error_invalid_port;
  }
  if(uri->host.len > 0 && uri->user.len <= 0 && uri->host.s > buf
      && (*(uri->host.s - 1) == '@' || *uri->host.s == '@')) {
    /* '@' before host, but no user part */
    goto error_bad_uri;
  }

#ifdef EXTRA_DEBUG
  /* do stuff */
  LM_DBG("state=%d\n", state);
  LM_DBG("parsed uri:\n type=%d user=<%.*s>(%d)\n passwd=<%.*s>(%d)\n"
       " host=<%.*s>(%d)\n port=<%.*s>(%d): %d\n params=<%.*s>(%d)\n"
       " headers=<%.*s>(%d)\n",
      uri->type, uri->user.len, ZSW(uri->user.s), uri->user.len,
      uri->passwd.len, ZSW(uri->passwd.s), uri->passwd.len, uri->host.len,
      ZSW(uri->host.s), uri->host.len, uri->port.len, ZSW(uri->port.s),
      uri->port.len, uri->port_no, uri->params.len, ZSW(uri->params.s),
      uri->params.len, uri->headers.len, ZSW(uri->headers.s),
      uri->headers.len);
  LM_DBG(" uri flags : ");
  if(uri->flags & URI_USER_NORMALIZE)
    LM_DBG("user_need_norm ");
  if(uri->flags & URI_SIP_USER_PHONE)
    LM_DBG("sip_user_phone ");
  LM_DBG("   value=%d\n", uri->flags);
  LM_DBG(" uri params:\n   transport=<%.*s>, val=<%.*s>, proto=%d\n",
      uri->transport.len, ZSW(uri->transport.s), uri->transport_val.len,
      ZSW(uri->transport_val.s), uri->proto);
  LM_DBG("   user-param=<%.*s>, val=<%.*s>\n", uri->user_param.len,
      ZSW(uri->user_param.s), uri->user_param_val.len,
      ZSW(uri->user_param_val.s));
  LM_DBG("   method=<%.*s>, val=<%.*s>\n", uri->method.len,
      ZSW(uri->method.s), uri->method_val.len, ZSW(uri->method_val.s));
  LM_DBG("   ttl=<%.*s>, val=<%.*s>\n", uri->ttl.len, ZSW(uri->ttl.s),
      uri->ttl_val.len, ZSW(uri->ttl_val.s));
  LM_DBG("   maddr=<%.*s>, val=<%.*s>\n", uri->maddr.len, ZSW(uri->maddr.s),
      uri->maddr_val.len, ZSW(uri->maddr_val.s));
  LM_DBG("   lr=<%.*s>\n", uri->lr.len, ZSW(uri->lr.s));
  LM_DBG("   r2=<%.*s>\n", uri->r2.len, ZSW(uri->r2.s));
#ifdef USE_COMP
  LM_DBG("   comp=%d\n", uri->comp);
#endif

#endif
  return 0;

error_too_short:
  LM_DBG("uri too short: <%.*s> (%d)\n", len, ZSW(buf), len);
  goto error_exit;
error_bad_char:
  LM_DBG("bad char '%c' in state %d"
       " parsed: <%.*s> (%d) / <%.*s> (%d)\n",
      *p, state, (int)(p - buf), ZSW(buf), (int)(p - buf), len, ZSW(buf),
      len);
  goto error_exit;
error_bad_host:
  LM_DBG("bad host in uri (error at char %c in"
       " state %d) parsed: <%.*s>(%d) /<%.*s> (%d)\n",
      *p, state, (int)(p - buf), ZSW(buf), (int)(p - buf), len, ZSW(buf),
      len);
  goto error_exit;
error_bad_port:
  LM_DBG("bad port in uri (error at char %c in"
       " state %d) parsed: <%.*s>(%d) /<%.*s> (%d)\n",
      *p, state, (int)(p - buf), ZSW(buf), (int)(p - buf), len, ZSW(buf),
      len);
  goto error_exit;
error_invalid_port:
  LM_DBG("bad port in uri: [%.*s] in <%.*s>\n", uri->port.len, uri->port.s,
      len, ZSW(buf));
  goto error_exit;
error_bad_uri:
  LM_DBG("bad uri,  state %d parsed: <%.*s> (%d) / <%.*s> (%d)\n", state,
      (int)(p - buf), ZSW(buf), (int)(p - buf), len, ZSW(buf), len);
  goto error_exit;
error_headers:
  LM_DBG("bad uri headers: <%.*s>(%d) / <%.*s>(%d)\n", uri->headers.len,
      ZSW(uri->headers.s), uri->headers.len, len, ZSW(buf), len);
  goto error_exit;
error_bug:
  LM_CRIT("BUG: bad  state %d parsed: <%.*s> (%d) / <%.*s> (%d)\n", state,
      (int)(p - buf), ZSW(buf), (int)(p - buf), len, ZSW(buf), len);
error_exit:
  ser_error = E_BAD_URI;
  uri->type = ERROR_URI_T;
  STATS_BAD_URI();
  return E_BAD_URI;
}


static inline int _parse_ruri(str *uri, int *status, struct sip_uri *parsed_uri)
{
  if(*status)
    return 1;

  if(parse_uri(uri->s, uri->len, parsed_uri) < 0) {
    LM_ERR("bad uri <%.*s>\n", uri->len, ZSW(uri->s));
    *status = 0;
    return -1;
  }
  *status = 1;
  return 1;
}

int parse_sip_msg_uri(struct sip_msg *msg)
{
  char *tmp;
  int tmp_len;
  if(msg->parsed_uri_ok)
    return 1;

  if(msg->new_uri.s) {
    tmp = msg->new_uri.s;
    tmp_len = msg->new_uri.len;
  } else {
    tmp = msg->first_line.u.request.uri.s;
    tmp_len = msg->first_line.u.request.uri.len;
  }
  if(parse_uri(tmp, tmp_len, &msg->parsed_uri) < 0) {
    LM_DBG("bad uri <%.*s>\n", tmp_len, tmp);
    msg->parsed_uri_ok = 0;
    return -1;
  }
  msg->parsed_uri_ok = 1;
  return 1;
}

int parse_orig_ruri(struct sip_msg *msg)
{
  int ret;

  ret = _parse_ruri(&REQ_LINE(msg).uri, &msg->parsed_orig_ruri_ok,
      &msg->parsed_orig_ruri);
  if(ret < 0)
    LM_ERR("parse orig ruri failed\n");
  return ret;
}

int normalize_tel_user(char *res, str *src)
{
  int i, l;
  l = 0;
  for(i = 0; i < src->len; i++) {
    switch(src->s[i]) {
      case '-':
      case '.':
      case '(':
      case ')':
        break;
      default:
        res[l++] = src->s[i];
    }
  }
  return l;
}


str s_sip = STR_STATIC_INIT("sip");
str s_sips = STR_STATIC_INIT("sips");
str s_tel = STR_STATIC_INIT("tel");
str s_tels = STR_STATIC_INIT("tels");
str s_urn = STR_STATIC_INIT("urn");
static str s_null = STR_STATIC_INIT("");

void uri_type_to_str(uri_type type, str *s)
{
  switch(type) {
    case SIP_URI_T:
      *s = s_sip;
      break;
    case SIPS_URI_T:
      *s = s_sips;
      break;
    case TEL_URI_T:
      *s = s_tel;
      break;
    case TELS_URI_T:
      *s = s_tels;
      break;
    case URN_URI_T:
      *s = s_urn;
      break;
    default:
      *s = s_null;
  }
}

static str s_udp = STR_STATIC_INIT("udp");
static str s_tcp = STR_STATIC_INIT("tcp");
static str s_tls = STR_STATIC_INIT("tls");
static str s_sctp = STR_STATIC_INIT("sctp");
static str s_ws = STR_STATIC_INIT("ws");

void proto_type_to_str(unsigned short type, str *s)
{
  switch(type) {
    case PROTO_UDP:
      *s = s_udp;
      break;
    case PROTO_TCP:
      *s = s_tcp;
      break;
    case PROTO_TLS:
      *s = s_tls;
      break;
    case PROTO_SCTP:
      *s = s_sctp;
      break;
    case PROTO_WS:
    case PROTO_WSS:
      *s = s_ws;
      break;
    default:
      *s = s_null;
  }
}

Coverage Report

Created: 2023-11-19 07:01