From 634504760b46b852ec2b812a7b68277e9c005f1b Mon Sep 17 00:00:00 2001 From: Florian Forster Date: Sat, 13 Jan 2007 16:41:16 +0100 Subject: [PATCH] network plugin: Changed the old network code to work as a plugin. It's mostly untested, but basic sending appears to work fine. --- configure.in | 4 +- src/Makefile.am | 12 +- src/network.c | 819 ++++++++++++++++++++++++++++++++++++------------ src/network.h | 12 +- 4 files changed, 647 insertions(+), 200 deletions(-) diff --git a/configure.in b/configure.in index 69ac2cfc..87aedd13 100644 --- a/configure.in +++ b/configure.in @@ -44,7 +44,7 @@ AC_CHECK_HEADERS(assert.h) AC_CHECK_HEADERS(sys/types.h) AC_CHECK_HEADERS(sys/socket.h) AC_CHECK_HEADERS(sys/select.h) -AC_CHECK_HEADERS(sys/poll.h) +AC_CHECK_HEADERS(poll.h) AC_CHECK_HEADERS(netdb.h) AC_CHECK_HEADERS(arpa/inet.h) AC_CHECK_HEADERS(sys/resource.h) @@ -993,6 +993,7 @@ AC_COLLECTD([load], [disable], [module], [system load statistics]) AC_COLLECTD([memory], [disable], [module], [memory statistics]) AC_COLLECTD([multimeter],[disable], [module], [multimeter statistics]) AC_COLLECTD([mysql], [disable], [module], [mysql statistics]) +AC_COLLECTD([network], [disable], [module], [network functionality]) AC_COLLECTD([nfs], [disable], [module], [nfs statistics]) AC_COLLECTD([ntpd], [disable], [module], [nfs statistics]) AC_COLLECTD([ping], [disable], [module], [ping statistics]) @@ -1045,6 +1046,7 @@ Configuration: memory . . . . . . $enable_memory multimeter . . . . $enable_multimeter mysql . . . . . . . $enable_mysql + network . . . . . . $enable_network nfs . . . . . . . . $enable_nfs ntpd . . . . . . . $enable_ntpd ping . . . . . . . $enable_ping diff --git a/src/Makefile.am b/src/Makefile.am index 0d1bbc67..07a5e982 100644 --- a/src/Makefile.am +++ b/src/Makefile.am @@ -15,7 +15,6 @@ collectd_SOURCES = collectd.c collectd.h \ utils_llist.c utils_llist.h \ utils_ignorelist.c utils_ignorelist.h \ common.c common.h \ - network.c network.h \ plugin.c plugin.h \ configfile.c configfile.h collectd_CPPFLAGS = $(LTDLINCL) @@ -260,6 +259,17 @@ collectd_LDADD += "-dlopen" mysql.la collectd_DEPENDENCIES += mysql.la endif +if BUILD_MODULE_NETWORK +pkglib_LTLIBRARIES += network.la +network_la_SOURCES = network.c +network_la_LDFLAGS = -module -avoid-version +if BUILD_WITH_LIBSOCKET +network_la_LDFLAGS += -lsocket +endif +collectd_LDADD += "-dlopen" network.la +collectd_DEPENDENCIES += network.la +endif + if BUILD_MODULE_NFS pkglib_LTLIBRARIES += nfs.la nfs_la_SOURCES = nfs.c diff --git a/src/network.c b/src/network.c index 22e911a8..4516331e 100644 --- a/src/network.c +++ b/src/network.c @@ -4,8 +4,7 @@ * * This program 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. + * Free Software Foundation; only version 2 of the License is applicable. * * This program is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of @@ -20,22 +19,33 @@ * Florian octo Forster **/ -#include -#include -#include -#include -#include -#include -#include -#include -#include -#include - -#include "network.h" +#include "collectd.h" +#include "plugin.h" #include "common.h" #include "configfile.h" #include "utils_debug.h" +#include "network.h" + +#if HAVE_PTHREAD_H +# include +#endif +#if HAVE_SYS_SOCKET_H +# include +#endif +#if HAVE_NETDB_H +# include +#endif +#if HAVE_NETINET_IN_H +# include +#endif +#if HAVE_ARPA_INET_H +# include +#endif +#if HAVE_POLL_H +# include +#endif + /* 1500 - 40 - 8 = Ethernet packet - IPv6 header - UDP header */ /* #define BUFF_SIZE 1452 */ @@ -49,36 +59,333 @@ #define BUFF_SIZE 4096 -extern int operating_mode; - +/* + * Private data types + */ typedef struct sockent { int fd; - int mode; struct sockaddr_storage *addr; socklen_t addrlen; struct sockent *next; } sockent_t; -static sockent_t *socklist_head = NULL; +/* 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 3 3 + * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 + * +-------+-----------------------+-------------------------------+ + * ! Ver. ! ! Length ! + * +-------+-----------------------+-------------------------------+ + */ +struct part_header_s +{ + uint16_t type; + uint16_t length; +}; +typedef struct part_header_s part_header_t; + +/* 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 3 3 + * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 + * +-------------------------------+-------------------------------+ + * ! Type ! Length ! + * +-------------------------------+-------------------------------+ + * : (Length - 4) Bytes : + * +---------------------------------------------------------------+ + */ +struct part_string_s +{ + part_header_t *head; + char *value; +}; +typedef struct part_string_s part_string_t; + +/* 1 1 1 1 1 1 1 1 1 1 2 2 2 2 2 2 2 2 2 2 3 3 + * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 + * +-------------------------------+-------------------------------+ + * ! Type ! Length ! + * +-------------------------------+---------------+---------------+ + * ! Num of values ! Type0 ! Type1 ! + * +-------------------------------+---------------+---------------+ + * ! Value0 ! + * ! ! + * +---------------------------------------------------------------+ + * ! Value1 ! + * ! ! + * +---------------------------------------------------------------+ + */ +struct part_values_s +{ + part_header_t *head; + uint16_t *num_values; + uint8_t *values_types; + value_t *values; +}; +typedef struct part_values_s part_values_t; + +/* + * Private variables + */ +static const char *config_keys[] = +{ + "Listen", + "Server", + "TimeToLive", + NULL +}; +static int config_keys_num = 3; + +static int network_config_ttl = 0; + +static sockent_t *sending_sockets = NULL; + +static struct pollfd *listen_sockets = NULL; +static int listen_sockets_num = 0; +static pthread_t listen_thread = 0; +static int listen_loop = 0; + +/* + * Private functions + */ +static int write_part_values (char **ret_buffer, int *ret_buffer_len, + const data_set_t *ds, const value_list_t *vl) +{ + part_values_t pv; + int i; -static int network_set_ttl (const sockent_t *se, const struct addrinfo *ai) + i = 6 + (9 * vl->values_len); + if (*ret_buffer_len < i) + return (-1); + *ret_buffer_len -= i; + + pv.head = (part_header_t *) *ret_buffer; + pv.num_values = (uint16_t *) (pv.head + 1); + pv.values_types = (uint8_t *) (pv.num_values + 1); + pv.values = (value_t *) (pv.values_types + vl->values_len); + *ret_buffer = (void *) (pv.values + vl->values_len); + + pv.head->type = htons (TYPE_VALUES); + pv.head->length = htons (6 + (9 * vl->values_len)); + *pv.num_values = htons ((uint16_t) vl->values_len); + + for (i = 0; i < vl->values_len; i++) + { + if (ds->ds[i].type == DS_TYPE_COUNTER) + { + pv.values_types[i] = DS_TYPE_COUNTER; + pv.values[i].counter = htonll (vl->values[i].counter); + } + else + { + pv.values_types[i] = DS_TYPE_GAUGE; + pv.values[i].gauge = vl->values[i].gauge; + } + } /* for (values) */ + + return (0); +} /* int write_part_values */ + +static int write_part_string (char **ret_buffer, int *ret_buffer_len, + int type, const char *str, int str_len) +{ + part_string_t ps; + int len; + + if (str_len < 1) + return (-1); + + len = 4 + str_len + 1; + if (*ret_buffer_len < len) + return (-1); + *ret_buffer_len -= len; + + ps.head = (part_header_t *) *ret_buffer; + ps.value = (char *) (ps.head + 1); + + ps.head->type = htons ((uint16_t) type); + ps.head->length = htons ((uint16_t) str_len + 4); + memcpy (ps.value, str, str_len); + ps.value[str_len] = '\0'; + *ret_buffer = (void *) (ps.value + str_len); + + return (0); +} /* int write_part_string */ + +static int parse_part_values (void **ret_buffer, int *ret_buffer_len, + value_t **ret_values, int *ret_num_values) { - char *ttl_str; - int ttl_int; + char *buffer = *ret_buffer; + int buffer_len = *ret_buffer_len; + part_values_t *pvalues; + int i; + + if (buffer_len < (15)) + { + DBG ("packet is too short"); + return (-1); + } + + pvalues = (part_values_t *) malloc (sizeof (part_values_t)); + if (pvalues == NULL) + return (-1); + + pvalues->head = (part_header_t *) buffer; + assert (pvalues->head->type == htons (TYPE_VALUES)); - ttl_str = cf_get_option ("TimeToLive", NULL); - if (ttl_str == NULL) + pvalues->num_values = (uint16_t *) (buffer + 4); + if (ntohs (*pvalues->num_values) + != ((ntohs (pvalues->head->length) - 6) / 9)) + { + DBG ("`length' and `num of values' don't match"); + free (pvalues); return (-1); + } + + pvalues->values_types = (uint8_t *) (buffer + 6); + pvalues->values = (value_t *) (buffer + 6 + *pvalues->num_values); + + for (i = 0; i < *pvalues->num_values; i++) + if (pvalues->values_types[i] == DS_TYPE_COUNTER) + pvalues->values[i].counter = ntohll (pvalues->values[i].counter); + + *ret_buffer = (void *) buffer; + *ret_buffer_len = buffer_len - pvalues->head->length; + *ret_num_values = *pvalues->num_values; + *ret_values = pvalues->values; + + free (pvalues); + + return (0); +} /* int parse_part_values */ + +static int parse_part_string (void **ret_buffer, int *ret_buffer_len, + char *output, int output_len) +{ + char *buffer = *ret_buffer; + int buffer_len = *ret_buffer_len; + part_string_t part_string; + + part_string.head = (part_header_t *) buffer; + if (buffer_len < part_string.head->length) + { + DBG ("packet is too short"); + return (-1); + } + assert ((part_string.head->type == htons (TYPE_HOST)) + || (part_string.head->type == htons (TYPE_PLUGIN)) + || (part_string.head->type == htons (TYPE_PLUGIN_INSTANCE)) + || (part_string.head->type == htons (TYPE_TYPE)) + || (part_string.head->type == htons (TYPE_TYPE_INSTANCE))); + + part_string.value = buffer + 4; + if (part_string.value[part_string.head->length - 5] != '\0') + { + DBG ("String does not end with a nullbyte"); + return (-1); + } - ttl_int = atoi (ttl_str); - if ((ttl_int < 1) || (ttl_int > 255)) + if (output_len < (part_string.head->length - 4)) { - syslog (LOG_WARNING, "A TTL value of %i is invalid.", ttl_int); + DBG ("output buffer is too small"); return (-1); } + strcpy (output, part_string.value); - DBG ("ttl = %i", ttl_int); + *ret_buffer = (void *) (buffer + part_string.head->length); + *ret_buffer_len = buffer_len - part_string.head->length; + + return (0); +} /* int parse_part_string */ + +static int parse_packet (void *buffer, int buffer_len) +{ + part_header_t *header; + int status; + + value_list_t vl; + char type[DATA_MAX_NAME_LEN]; + + memset (&vl, '\0', sizeof (vl)); + memset (&type, '\0', sizeof (type)); + + while (buffer_len > sizeof (part_header_t)) + { + header = (part_header_t *) buffer; + + if (header->length > buffer_len) + break; + + if (header->type == TYPE_VALUES) + { + status = parse_part_values (&buffer, &buffer_len, + &vl.values, &vl.values_len); + + if ((status == 0) + && (strlen (vl.host) > 0) + && (strlen (vl.plugin) > 0) + && (strlen (type) > 0)) + plugin_dispatch_values (type, &vl); + } + else if (header->type == TYPE_HOST) + { + status = parse_part_string (&buffer, &buffer_len, + vl.host, sizeof (vl.host)); + } + else if (header->type == TYPE_PLUGIN) + { + status = parse_part_string (&buffer, &buffer_len, + vl.plugin, sizeof (vl.plugin)); + } + else if (header->type == TYPE_PLUGIN_INSTANCE) + { + status = parse_part_string (&buffer, &buffer_len, + vl.plugin_instance, sizeof (vl.plugin_instance)); + } + else if (header->type == TYPE_TYPE) + { + status = parse_part_string (&buffer, &buffer_len, + type, sizeof (type)); + } + else if (header->type == TYPE_TYPE_INSTANCE) + { + status = parse_part_string (&buffer, &buffer_len, + vl.type_instance, sizeof (vl.type_instance)); + } + else + { + DBG ("Unknown part type: 0x%0hx", header->type); + buffer = ((char *) buffer) + header->length; + } + } /* while (buffer_len > sizeof (part_header_t)) */ + + return (0); +} /* int parse_packet */ + +static void free_sockent (sockent_t *se) +{ + sockent_t *next; + while (se != NULL) + { + next = se->next; + free (se->addr); + free (se); + se = next; + } +} /* void free_sockent */ + +/* + * int network_set_ttl + * + * Set the `IP_MULTICAST_TTL', `IP_TTL', `IPV6_MULTICAST_HOPS' or + * `IPV6_UNICAST_HOPS', depending on which option is applicable. + * + * The `struct addrinfo' is used to destinguish between unicast and multicast + * sockets. + */ +static int network_set_ttl (const sockent_t *se, const struct addrinfo *ai) +{ + if ((network_config_ttl < 1) || (network_config_ttl > 255)) + return (-1); + + DBG ("ttl = %i", network_config_ttl); if (ai->ai_family == AF_INET) { @@ -91,7 +398,8 @@ static int network_set_ttl (const sockent_t *se, const struct addrinfo *ai) optname = IP_TTL; if (setsockopt (se->fd, IPPROTO_IP, optname, - &ttl_int, sizeof (ttl_int)) == -1) + &network_config_ttl, + sizeof (network_config_ttl)) == -1) { syslog (LOG_ERR, "setsockopt: %s", strerror (errno)); return (-1); @@ -109,7 +417,8 @@ static int network_set_ttl (const sockent_t *se, const struct addrinfo *ai) optname = IPV6_UNICAST_HOPS; if (setsockopt (se->fd, IPPROTO_IPV6, optname, - &ttl_int, sizeof (ttl_int)) == -1) + &network_config_ttl, + sizeof (network_config_ttl)) == -1) { syslog (LOG_ERR, "setsockopt: %s", strerror (errno)); return (-1); @@ -117,7 +426,7 @@ static int network_set_ttl (const sockent_t *se, const struct addrinfo *ai) } return (0); -} +} /* int network_set_ttl */ static int network_bind_socket (const sockent_t *se, const struct addrinfo *ai) { @@ -200,31 +509,21 @@ static int network_bind_socket (const sockent_t *se, const struct addrinfo *ai) } return (0); -} +} /* int network_bind_socket */ -int network_create_socket (const char *node, const char *service) +static sockent_t *network_create_socket (const char *node, + const char *service, + int listen) { - sockent_t *socklist_tail; - struct addrinfo ai_hints; struct addrinfo *ai_list, *ai_ptr; int ai_return; - int num_added = 0; + sockent_t *se_head = NULL; + sockent_t *se_tail = NULL; DBG ("node = %s, service = %s", node, service); - if (operating_mode == MODE_LOCAL || operating_mode == MODE_LOG) - { - syslog (LOG_WARNING, "network_create_socket: There is no point opening a socket when you are in mode `%s'.", - operating_mode == MODE_LOCAL ? "Local" : "Log"); - return (-1); - } - - socklist_tail = socklist_head; - while ((socklist_tail != NULL) && (socklist_tail->next != NULL)) - socklist_tail = socklist_tail->next; - memset (&ai_hints, '\0', sizeof (ai_hints)); ai_hints.ai_flags = 0; #ifdef AI_PASSIVE @@ -233,17 +532,20 @@ int network_create_socket (const char *node, const char *service) #ifdef AI_ADDRCONFIG ai_hints.ai_flags |= AI_ADDRCONFIG; #endif - ai_hints.ai_family = PF_UNSPEC; + ai_hints.ai_family = AF_UNSPEC; ai_hints.ai_socktype = SOCK_DGRAM; ai_hints.ai_protocol = IPPROTO_UDP; - if ((ai_return = getaddrinfo (node, service, &ai_hints, &ai_list)) != 0) + ai_return = getaddrinfo (node, service, &ai_hints, &ai_list); + if (ai_return != 0) { syslog (LOG_ERR, "getaddrinfo (%s, %s): %s", - node == NULL ? "(null)" : node, - service == NULL ? "(null)" : service, - ai_return == EAI_SYSTEM ? strerror (errno) : gai_strerror (ai_return)); - return (-1); + (node == NULL) ? "(null)" : node, + (service == NULL) ? "(null)" : service, + (ai_return == EAI_SYSTEM) + ? strerror (errno) + : gai_strerror (ai_return)); + return (NULL); } for (ai_ptr = ai_list; ai_ptr != NULL; ai_ptr = ai_ptr->ai_next) @@ -268,8 +570,9 @@ int network_create_socket (const char *node, const char *service) memcpy (se->addr, ai_ptr->ai_addr, ai_ptr->ai_addrlen); se->addrlen = ai_ptr->ai_addrlen; - se->mode = operating_mode; - se->fd = socket (ai_ptr->ai_family, ai_ptr->ai_socktype, ai_ptr->ai_protocol); + se->fd = socket (ai_ptr->ai_family, + ai_ptr->ai_socktype, + ai_ptr->ai_protocol); se->next = NULL; if (se->fd == -1) @@ -280,7 +583,7 @@ int network_create_socket (const char *node, const char *service) continue; } - if (operating_mode == MODE_SERVER) + if (listen != 0) { if (network_bind_socket (se, ai_ptr) != 0) { @@ -289,201 +592,185 @@ int network_create_socket (const char *node, const char *service) continue; } } - else if (operating_mode == MODE_CLIENT) + else /* listen == 0 */ { network_set_ttl (se, ai_ptr); } - if (socklist_tail == NULL) + if (se_tail == NULL) { - socklist_head = se; - socklist_tail = se; + se_head = se; + se_tail = se; } else { - socklist_tail->next = se; - socklist_tail = se; + se_tail->next = se; + se_tail = se; } - num_added++; - /* We don't open more than one write-socket per node/service pair.. */ - if (operating_mode == MODE_CLIENT) + if (listen == 0) break; } freeaddrinfo (ai_list); - return (num_added); -} + return (se_head); +} /* sockent_t *network_create_socket */ -static int network_connect_default (void) +static sockent_t *network_create_default_socket (int listen) { - int ret; + sockent_t *se_ptr = NULL; + sockent_t *se_head = NULL; + sockent_t *se_tail = NULL; - if (socklist_head != NULL) - return (0); + se_ptr = network_create_socket (NET_DEFAULT_V6_ADDR, + NET_DEFAULT_PORT, listen); - DBG ("socklist_head is NULL"); + /* Don't send to the same machine in IPv6 and IPv4 if both are available. */ + if ((listen == 0) && (se_ptr != NULL)) + return (se_ptr); - ret = 0; + if (se_ptr != NULL) + { + se_head = se_ptr; + se_tail = se_ptr; + while (se_tail->next != NULL) + se_tail = se_tail->next; + } - if (network_create_socket (NET_DEFAULT_V6_ADDR, NET_DEFAULT_PORT) > 0) - ret++; + se_ptr = network_create_socket (NET_DEFAULT_V4_ADDR, NET_DEFAULT_PORT, listen); - /* Don't use IPv4 and IPv6 in parallel by default.. */ - if ((operating_mode == MODE_CLIENT) && (ret != 0)) - return (ret); + if (se_tail == NULL) + return (se_ptr); - if (network_create_socket (NET_DEFAULT_V4_ADDR, NET_DEFAULT_PORT) > 0) - ret++; + se_tail->next = se_ptr; + return (se_head); +} /* sockent_t *network_create_default_socket */ - if (ret == 0) - ret = -1; +static int network_add_listen_socket (const char *node, const char *service) +{ + sockent_t *se; + sockent_t *se_ptr; + int se_num = 0; - return (ret); -} + if (service == NULL) + service = NET_DEFAULT_PORT; -static int network_get_listen_socket (void) -{ - int fd; - int max_fd; - int status; + if (node == NULL) + se = network_create_default_socket (1 /* listen == true */); + else + se = network_create_socket (node, service, 1 /* listen == true */); - fd_set readfds; - sockent_t *se; + if (se == NULL) + return (-1); - if (socklist_head == NULL) - network_connect_default (); + for (se_ptr = se; se_ptr != NULL; se_ptr = se_ptr->next) + se_num++; - FD_ZERO (&readfds); - max_fd = -1; - for (se = socklist_head; se != NULL; se = se->next) + listen_sockets = (struct pollfd *) realloc (listen_sockets, + (listen_sockets_num + se_num) + * sizeof (struct pollfd)); + + for (se_ptr = se; se_ptr != NULL; se_ptr = se_ptr->next) { - if (se->mode != operating_mode) - continue; + listen_sockets[listen_sockets_num].fd = se_ptr->fd; + listen_sockets[listen_sockets_num].events = POLLIN | POLLPRI; + listen_sockets[listen_sockets_num].revents = 0; + listen_sockets_num++; + } /* for (se) */ - FD_SET (se->fd, &readfds); - if (se->fd >= max_fd) - max_fd = se->fd + 1; - } + free_sockent (se); + return (0); +} /* int network_add_listen_socket */ - if (max_fd == -1) - { - syslog (LOG_WARNING, "No listen sockets found!"); - return (-1); - } +static int network_add_sending_socket (const char *node, const char *service) +{ + sockent_t *se; + sockent_t *se_ptr; - status = select (max_fd, &readfds, NULL, NULL, NULL); + if (service == NULL) + service = NET_DEFAULT_PORT; - if (status == -1) - { - if (errno != EINTR) - syslog (LOG_ERR, "select: %s", strerror (errno)); + if (node == NULL) + se = network_create_default_socket (0 /* listen == false */); + else + se = network_create_socket (node, service, 0 /* listen == false */); + + if (se == NULL) return (-1); - } - fd = -1; - for (se = socklist_head; se != NULL; se = se->next) + if (sending_sockets == NULL) { - if (se->mode != operating_mode) - continue; - - if (FD_ISSET (se->fd, &readfds)) - { - fd = se->fd; - break; - } + sending_sockets = se; + return (0); } - if (fd == -1) - syslog (LOG_WARNING, "No socket ready..?"); + for (se_ptr = sending_sockets; se_ptr->next != NULL; se_ptr = se_ptr->next) + /* seek end */; - DBG ("fd = %i", fd); - return (fd); -} + se_ptr->next = se; + return (0); +} /* int network_get_listen_socket */ -int network_receive (char **host, char **type, char **inst, char **value) +int network_receive (void) { - int fd; char buffer[BUFF_SIZE]; + int buffer_len; - struct sockaddr_storage addr; - socklen_t addrlen; + int i; int status; - char *fields[4]; - - assert (operating_mode == MODE_SERVER); - - *host = NULL; - *type = NULL; - *inst = NULL; - *value = NULL; - - if ((fd = network_get_listen_socket ()) < 0) - return (-1); - - addrlen = sizeof (addr); - if (recvfrom (fd, buffer, BUFF_SIZE, 0, (struct sockaddr *) &addr, &addrlen) == -1) - { - syslog (LOG_ERR, "recvfrom: %s", strerror (errno)); - return (-1); - } - - if ((*host = (char *) malloc (BUFF_SIZE)) == NULL) - { - syslog (LOG_EMERG, "malloc: %s", strerror (errno)); - return (-1); - } + if (listen_sockets_num == 0) + network_add_listen_socket (NULL, NULL); - status = getnameinfo ((struct sockaddr *) &addr, addrlen, - *host, BUFF_SIZE, NULL, 0, 0); - if (status != 0) + if (listen_sockets_num == 0) { - free (*host); *host = NULL; - syslog (LOG_ERR, "getnameinfo: %s", - status == EAI_SYSTEM ? strerror (errno) : gai_strerror (status)); + syslog (LOG_ERR, "network: Failed to open a listening socket."); return (-1); } - if (strsplit (buffer, fields, 4) != 3) + while (listen_loop == 0) { - syslog (LOG_WARNING, "Invalid message from `%s'", *host); - free (*host); *host = NULL; - return (-1); - } + status = poll (listen_sockets, listen_sockets_num, -1); - if ((*type = strdup (fields[0])) == NULL) - { - syslog (LOG_EMERG, "strdup: %s", strerror (errno)); - free (*host); *host = NULL; - return (-1); - } + if (status <= 0) + { + if (errno == EINTR) + continue; + syslog (LOG_ERR, "poll failed: %s", + strerror (errno)); + return (-1); + } - if ((*inst = strdup (fields[1])) == NULL) - { - syslog (LOG_EMERG, "strdup: %s", strerror (errno)); - free (*host); *host = NULL; - free (*type); *type = NULL; - return (-1); - } + for (i = 0; (i < listen_sockets_num) && (status > 0); i++) + { + if ((listen_sockets[i].revents & (POLLIN | POLLPRI)) == 0) + continue; + status--; - if ((*value = strdup (fields[2])) == NULL) - { - syslog (LOG_EMERG, "strdup: %s", strerror (errno)); - free (*host); *host = NULL; - free (*type); *type = NULL; - free (*inst); *inst = NULL; - return (-1); - } + buffer_len = recv (listen_sockets[i].fd, + buffer, sizeof (buffer), + 0 /* no flags */); + if (buffer_len < 0) + { + syslog (LOG_ERR, "recv failed: %s", strerror (errno)); + return (-1); + } - DBG ("host = %s, type = %s, inst = %s, value = %s", - *host, *type, *inst, *value); + parse_packet (buffer, buffer_len); + } /* for (listen_sockets) */ + } /* while (listen_loop == 0) */ return (0); } +static void *receive_thread (void *arg) +{ + return ((void *) network_receive ()); +} /* void *receive_thread */ + +#if 0 int network_send (char *type, char *inst, char *value) { char buf[BUFF_SIZE]; @@ -508,14 +795,11 @@ int network_send (char *type, char *inst, char *value) buflen++; if (socklist_head == NULL) - network_connect_default (); + network_create_default_socket (0 /* listen == false */); ret = 0; for (se = socklist_head; se != NULL; se = se->next) { - if (se->mode != operating_mode) - continue; - while (1) { status = sendto (se->fd, buf, buflen, 0, @@ -545,4 +829,153 @@ int network_send (char *type, char *inst, char *value) syslog (LOG_WARNING, "Message wasn't sent to anybody.."); return (ret); +} /* int network_send */ +#endif + +static int network_write (const data_set_t *ds, const value_list_t *vl) +{ + char buf[BUFF_SIZE]; + char *buf_ptr; + int buf_len; + + sockent_t *se; + + DBG ("host = %s; plugin = %s; plugin_instance = %s; type = %s; type_instance = %s;", + vl->host, vl->plugin, vl->plugin_instance, ds->type, vl->type_instance); + + buf_len = sizeof (buf); + buf_ptr = buf; + if (write_part_string (&buf_ptr, &buf_len, TYPE_HOST, + vl->host, strlen (vl->host)) != 0) + return (-1); + if (write_part_string (&buf_ptr, &buf_len, TYPE_PLUGIN, + vl->plugin, strlen (vl->plugin)) != 0) + return (-1); + if (strlen (vl->plugin_instance) > 0) + if (write_part_string (&buf_ptr, &buf_len, TYPE_PLUGIN_INSTANCE, + vl->plugin_instance, + strlen (vl->plugin_instance)) != 0) + return (-1); + if (write_part_string (&buf_ptr, &buf_len, TYPE_TYPE, + ds->type, strlen (ds->type)) != 0) + return (-1); + if (strlen (vl->type_instance) > 0) + if (write_part_string (&buf_ptr, &buf_len, TYPE_PLUGIN_INSTANCE, + vl->type_instance, + strlen (vl->type_instance)) != 0) + return (-1); + + write_part_values (&buf_ptr, &buf_len, ds, vl); + + buf_len = sizeof (buf) - buf_len; + + for (se = sending_sockets; se != NULL; se = se->next) + { + int status; + + while (42) + { + status = sendto (se->fd, buf, buf_len, 0 /* no flags */, + (struct sockaddr *) se->addr, se->addrlen); + if (status < 0) + { + if (errno == EINTR) + continue; + syslog (LOG_ERR, "network: sendto failed: %s", + strerror (errno)); + break; + } + + break; + } /* while (42) */ + } /* for (sending_sockets) */ + + return 0; +} + +static int network_config (const char *key, const char *val) +{ + char *node; + char *service; + + char *fields[3]; + int fields_num; + + if ((strcasecmp ("Listen", key) == 0) + || (strcasecmp ("Server", key) == 0)) + { + char *val_cpy = strdup (val); + if (val_cpy == NULL) + return (1); + + service = NET_DEFAULT_PORT; + fields_num = strsplit (val_cpy, fields, 3); + if ((fields_num != 1) + && (fields_num != 2)) + return (1); + else if (fields_num == 2) + service = fields[1]; + node = fields[0]; + + if (strcasecmp ("Listen", key) == 0) + network_add_listen_socket (node, service); + else + network_add_sending_socket (node, service); + } + else if (strcasecmp ("TimeToLive", key) == 0) + { + int tmp = atoi (val); + if ((tmp > 0) && (tmp < 256)) + network_config_ttl = tmp; + else + return (1); + } + else + { + return (-1); + } + return (0); +} + +static int network_shutdown (void) +{ + DBG ("Shutting down."); + + listen_loop++; + + pthread_kill (listen_thread, SIGTERM); + pthread_join (listen_thread, NULL /* no return value */); + + listen_thread = 0; + + return (0); +} + +static int network_init (void) +{ + plugin_register_shutdown ("network", network_shutdown); + + /* setup socket(s) and so on */ + if (sending_sockets != NULL) + plugin_register_write ("network", network_write); + + if ((listen_sockets_num != 0) && (listen_thread == 0)) + { + int status; + + status = pthread_create (&listen_thread, NULL /* no attributes */, + receive_thread, NULL /* no argument */); + + if (status != 0) + syslog (LOG_ERR, "network: pthread_create failed: %s", + strerror (errno)); + } + return (0); +} /* int network_init */ + +void module_register (void) +{ + plugin_register_config ("network", network_config, + config_keys, config_keys_num); + plugin_register_init ("network", network_init); } diff --git a/src/network.h b/src/network.h index 2df989b3..5f2bc212 100644 --- a/src/network.h +++ b/src/network.h @@ -4,8 +4,7 @@ * * This program 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. + * Free Software Foundation; only version 2 of the License is applicable. * * This program is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of @@ -55,8 +54,11 @@ #define NET_DEFAULT_V6_ADDR "ff18::efc0:4a42" #define NET_DEFAULT_PORT "25826" -int network_create_socket (const char *node, const char *service); -int network_receive (char **host, char **type, char **instance, char **value); -int network_send (char *type, char *instance, char *value); +#define TYPE_HOST 0x0000 +#define TYPE_PLUGIN 0x0001 +#define TYPE_PLUGIN_INSTANCE 0x0002 +#define TYPE_TYPE 0x0003 +#define TYPE_TYPE_INSTANCE 0x0004 +#define TYPE_VALUES 0x0005 #endif /* NETWORK_H */ -- 2.30.2