diff options
Diffstat (limited to 'accel-pppd/extra/chap-secrets.c')
| -rw-r--r-- | accel-pppd/extra/chap-secrets.c | 281 |
1 files changed, 281 insertions, 0 deletions
diff --git a/accel-pppd/extra/chap-secrets.c b/accel-pppd/extra/chap-secrets.c new file mode 100644 index 00000000..35503473 --- /dev/null +++ b/accel-pppd/extra/chap-secrets.c @@ -0,0 +1,281 @@ +#include <stdio.h> +#include <errno.h> +#include <string.h> +#include <netinet/in.h> +#include <arpa/inet.h> + +#include "pwdb.h" +#include "ipdb.h" +#include "ppp.h" +#include "events.h" +#include "triton.h" +#include "log.h" + +#include "memdebug.h" + +static char *def_chap_secrets = "/etc/ppp/chap-secrets"; +static char *conf_chap_secrets; +static in_addr_t conf_gw_ip_address = 0; + +static void *pd_key; +static struct ipdb_t ipdb; + +struct cs_pd_t +{ + struct ppp_pd_t pd; + struct ipdb_item_t ip; + char *passwd; + char *rate; +}; + +static char *skip_word(char *ptr) +{ + char quote = 0; + + if (*ptr == '\'' || *ptr == '"') { + quote = *ptr; + ptr++; + } + + for(; *ptr; ptr++) { + if (quote) { + if (*ptr == '\n') + break; + if (*ptr == '\\' && ptr[1] && ptr[1] != '\n') { + memmove(ptr, ptr + 1, strlen(ptr)); + continue; + } + if (*ptr == quote) { + *ptr = ' '; + break; + } + } else if (*ptr == ' ' || *ptr == '\t' || *ptr == '\n') + break; + } + return ptr; +} +static char *skip_space(char *ptr) +{ + for(; *ptr; ptr++) + if (*ptr != ' ' && *ptr != '\t') + break; + return ptr; +} +static int split(char *buf, char **ptr) +{ + int i; + + for (i = 0; i < 4; i++) { + buf = skip_word(buf); + if (!*buf) + return i; + + *buf = 0; + + buf = skip_space(buf + 1); + if (!*buf) + return i; + + if (*buf == '"' || *buf == '\'') + ptr[i] = buf + 1; + else + ptr[i] = buf; + } + + buf = skip_word(buf); + //if (*buf == '\n') + *buf = 0; + //else if (*buf) + // return -1; + + return i; +} + + +static struct cs_pd_t *create_pd(struct ppp_t *ppp, const char *username) +{ + FILE *f; + char *buf; + char *ptr[5]; + int n; + struct cs_pd_t *pd; + + if (!conf_chap_secrets) + return NULL; + + f = fopen(conf_chap_secrets, "r"); + if (!f) { + log_error("chap-secrets: open '%s': %s\n", conf_chap_secrets, strerror(errno)); + return NULL; + } + + buf = _malloc(4096); + if (!buf) { + log_emerg("chap-secrets: out of memory\n"); + fclose(f); + return NULL; + } + + while (fgets(buf, 4096, f)) { + if (buf[0] == '#') + continue; + n = split(buf, ptr); + if (n < 3) + continue; + if (*buf == '\'' || *buf == '"') { + if (!strcmp(buf + 1, username)) + goto found; + } else { + if (!strcmp(buf, username)) + goto found; + } + } + +out: + fclose(f); + _free(buf); + return NULL; + +found: + pd = _malloc(sizeof(*pd)); + if (!pd) { + log_emerg("chap-secrets: out of memory\n"); + goto out; + } + + memset(pd, 0, sizeof(*pd)); + pd->pd.key = &pd_key; + pd->passwd = _strdup(ptr[1]); + if (!pd->passwd) { + log_emerg("chap-secrets: out of memory\n"); + _free(pd); + goto out; + } + + pd->ip.addr = conf_gw_ip_address; + if (n >= 3) + pd->ip.peer_addr = inet_addr(ptr[2]); + pd->ip.owner = &ipdb; + + if (n == 4) + pd->rate = _strdup(ptr[3]); + + list_add_tail(&pd->pd.entry, &ppp->pd_list); + + fclose(f); + _free(buf); + + return pd; +} + +static struct cs_pd_t *find_pd(struct ppp_t *ppp) +{ + struct ppp_pd_t *pd; + + list_for_each_entry(pd, &ppp->pd_list, entry) { + if (pd->key == &pd_key) { + return container_of(pd, typeof(struct cs_pd_t), pd); + } + } + + return NULL; +} + +static void ev_ppp_finished(struct ppp_t *ppp) +{ + struct cs_pd_t *pd = find_pd(ppp); + + if (!pd) + return; + + list_del(&pd->pd.entry); + _free(pd->passwd); + if (pd->rate) + _free(pd->rate); + _free(pd); +} + +static void ev_ppp_pre_up(struct ppp_t *ppp) +{ + struct cs_pd_t *pd = find_pd(ppp); + struct ev_shaper_t ev = { + .ppp = ppp, + }; + + if (!pd) + return; + + if (pd->rate) { + ev.val = pd->rate; + triton_event_fire(EV_SHAPER, &ev); + } +} + +static struct ipdb_item_t *get_ip(struct ppp_t *ppp) +{ + struct cs_pd_t *pd; + + if (!conf_gw_ip_address) + return NULL; + + pd = find_pd(ppp); + + if (!pd) + return NULL; + + if (!pd->ip.addr) + return NULL; + + return &pd->ip; +} + +static char* get_passwd(struct pwdb_t *pwdb, struct ppp_t *ppp, const char *username) +{ + struct cs_pd_t *pd = find_pd(ppp); + + if (!pd) + pd = create_pd(ppp, username); + + if (!pd) + return NULL; + + return _strdup(pd->passwd); +} + +static struct ipdb_t ipdb = { + .get = get_ip, +}; + +static struct pwdb_t pwdb = { + .get_passwd = get_passwd, +}; + +static void load_config(void) +{ + const char *opt; + + if (conf_chap_secrets && conf_chap_secrets != def_chap_secrets) + _free(conf_chap_secrets); + opt = conf_get_opt("chap-secrets", "chap-secrets"); + if (opt) + conf_chap_secrets = _strdup(opt); + else + conf_chap_secrets = def_chap_secrets; + + opt = conf_get_opt("chap-secrets", "gw-ip-address"); + if (opt) + conf_gw_ip_address = inet_addr(opt); +} + +static void __init init(void) +{ + load_config(); + + pwdb_register(&pwdb); + ipdb_register(&ipdb); + + triton_event_register_handler(EV_PPP_FINISHED, (triton_event_func)ev_ppp_finished); + triton_event_register_handler(EV_PPP_PRE_UP, (triton_event_func)ev_ppp_pre_up); + triton_event_register_handler(EV_CONFIG_RELOAD, (triton_event_func)load_config); +} + |