diff options
Diffstat (limited to 'contrib/bsnmp/lib/snmpclient.c')
-rw-r--r-- | contrib/bsnmp/lib/snmpclient.c | 128 |
1 files changed, 65 insertions, 63 deletions
diff --git a/contrib/bsnmp/lib/snmpclient.c b/contrib/bsnmp/lib/snmpclient.c index 0c559bf2c1fe..285ffdb4c1b0 100644 --- a/contrib/bsnmp/lib/snmpclient.c +++ b/contrib/bsnmp/lib/snmpclient.c @@ -1874,38 +1874,47 @@ snmp_client_set_port(struct snmp_client *cl, const char *p) return (0); } +static const char *const trans_list[] = { + [SNMP_TRANS_UDP] = "udp::", + [SNMP_TRANS_LOC_DGRAM] = "dgram::", + [SNMP_TRANS_LOC_STREAM] = "stream::", + [SNMP_TRANS_UDP6] = "udp6::", +}; + /** * Try to get a transport identifier which is a leading alphanumeric string - * (starting with '_' or a letter and including also '_') terminated by - * a double colon. The string may not be empty. The transport identifier - * is optional. + * terminated by a double colon. The string may not be empty. The transport + * identifier is optional. * * \param sc client struct to set errors * \param strp possible start of transport; updated to point to * the next character to parse * - * \return end of transport; equals *strp if there is none; NULL if there - * was an error + * \return transport identifier */ -static inline const char * +static inline int get_transp(struct snmp_client *sc, const char **strp) { - const char *p = *strp; + const char *p; + size_t i; - if (isascii(*p) && (isalpha(*p) || *p == '_')) { - p++; - while (isascii(*p) && (isalnum(*p) || *p == '_')) - p++; - if (p[0] == ':' && p[1] == ':') { - *strp = p + 2; - return (p); + for (i = 0; i < nitems(trans_list); i++) { + if (trans_list[i] == NULL || *trans_list[i] == '\0') + continue; + p = strstr(*strp, trans_list[i]); + if (p == *strp) { + *strp += strlen(trans_list[i]); + return ((int)i); } } + + p = *strp; if (p[0] == ':' && p[1] == ':') { seterr(sc, "empty transport specifier"); - return (NULL); + return (-1); } - return (*strp); + /* by default assume UDP */ + return (SNMP_TRANS_UDP); } /** @@ -2143,24 +2152,13 @@ save_str(struct snmp_client *sc, const char *const s[2]) int snmp_parse_server(struct snmp_client *sc, const char *str) { -#if DEBUG_PARSE const char *const orig = str; -#endif - - const char *const trans_list[] = { - [SNMP_TRANS_UDP] = "udp", - [SNMP_TRANS_LOC_DGRAM] = "dgram", - [SNMP_TRANS_LOC_STREAM] = "stream", - [SNMP_TRANS_UDP6] = "udp6", - }; - /* parse input */ - const char *const transp[2] = { - str, - get_transp(sc, &str), - }; - if (transp[1] == NULL) + int i, trans = get_transp(sc, &str); + if (trans < 0) return (-1); + /* choose automatically */ + i = orig == str ? -1: trans; const char *const comm[2] = { str, @@ -2206,7 +2204,7 @@ snmp_parse_server(struct snmp_client *sc, const char *str) } #if DEBUG_PARSE - printf("transp: %zu %zu\n", transp[0] - orig, transp[1] - orig); + printf("transp: %u\n", trans); printf("comm: %zu %zu\n", comm[0] - orig, comm[1] - orig); printf("ipv6: %zu %zu\n", ipv6[0] - orig, ipv6[1] - orig); printf("ipv4: %zu %zu\n", ipv4[0] - orig, ipv4[1] - orig); @@ -2215,69 +2213,73 @@ snmp_parse_server(struct snmp_client *sc, const char *str) #endif /* analyse and allocate */ - int i = -1; - if (transp[0] != transp[1]) { - for (i = 0; i < (int)nitems(trans_list); i++) { - if (trans_list[i] != NULL && - strlen(trans_list[i]) == (size_t)(transp[1] - - transp[0]) && !strncmp(trans_list[i], transp[0], - transp[1] - transp[0])) - break; - } - - if (i == (int)nitems(trans_list)) { - seterr(sc, "unknown transport specifier '%.*s'", - transp[1] - transp[0], transp[0]); - return (-1); - } - } - char *chost; if (ipv6[0] != ipv6[1]) { if ((chost = save_str(sc, ipv6)) == NULL) return (-1); - if (i == -1) - i = SNMP_TRANS_UDP6; + if (i == -1 || trans == SNMP_TRANS_UDP) + trans = SNMP_TRANS_UDP6; } else if (ipv4[0] != ipv4[1]) { if ((chost = save_str(sc, ipv4)) == NULL) return (-1); if (i == -1) - i = SNMP_TRANS_UDP; + trans = SNMP_TRANS_UDP; } else { if ((chost = save_str(sc, host)) == NULL) return (-1); if (i == -1) { - /* Default transport is UDP unless the host contains - * a slash in which case we default to DGRAM. */ - i = SNMP_TRANS_UDP; + /* + * Default transport is UDP unless the host contains + * a slash in which case we default to DGRAM. + */ for (const char *p = host[0]; p < host[1]; p++) if (*p == '/') { - i = SNMP_TRANS_LOC_DGRAM; + trans = SNMP_TRANS_LOC_DGRAM; break; } } } - char *cport = save_str(sc, port); + char *cport; + + if (port[0] == port[1] && ( + trans == SNMP_TRANS_UDP || trans == SNMP_TRANS_UDP6)) { + /* If port was not specified, use "snmp" name by default */ + cport = strdup("snmp"); + } else + cport = save_str(sc, port); + if (cport == NULL) { free(chost); return (-1); } /* commit */ - sc->trans = i; - - strncpy(sc->read_community, comm[0], comm[1] - comm[0]); - sc->read_community[comm[1] - comm[0]] = '\0'; - strncpy(sc->write_community, comm[0], comm[1] - comm[0]); - sc->write_community[comm[1] - comm[0]] = '\0'; + sc->trans = trans; + /* + * If community string was specified and it is empty, overwrite it. + * If it was not specified, use default. + */ + if (comm[0] != comm[1] || strrchr(comm[0], '@') != NULL) { + strncpy(sc->read_community, comm[0], comm[1] - comm[0]); + sc->read_community[comm[1] - comm[0]] = '\0'; + strncpy(sc->write_community, comm[0], comm[1] - comm[0]); + sc->write_community[comm[1] - comm[0]] = '\0'; + } free(sc->chost); sc->chost = chost; free(sc->cport); sc->cport = cport; +#if DEBUG_PARSE + printf("Committed values:\n"); + printf("trans: %u\n", sc->trans); + printf("comm: '%s'/'%s'\n", sc->read_community, sc->write_community); + printf("host: '%s'\n", sc->chost); + printf("port: '%s'\n", sc->cport); +#endif return (0); } |