diff options
Diffstat (limited to 'accel-pptpd/ppp/lcp_opt_mru.c')
| -rw-r--r-- | accel-pptpd/ppp/lcp_opt_mru.c | 159 |
1 files changed, 159 insertions, 0 deletions
diff --git a/accel-pptpd/ppp/lcp_opt_mru.c b/accel-pptpd/ppp/lcp_opt_mru.c new file mode 100644 index 00000000..eab57b02 --- /dev/null +++ b/accel-pptpd/ppp/lcp_opt_mru.c @@ -0,0 +1,159 @@ +#include <stdlib.h> +#include <string.h> +#include <errno.h> +#include <stdio.h> +#include <arpa/inet.h> +#include <net/if.h> +#include <linux/if_ppp.h> +#include <sys/ioctl.h> + +#include "ppp.h" +#include "ppp_lcp.h" +#include "log.h" + +#include "memdebug.h" + +static int conf_mtu; +static int conf_mru; +static int conf_min_mtu = 100; +static int conf_max_mtu = 1500; + +static struct lcp_option_t *mru_init(struct ppp_lcp_t *lcp); +static void mru_free(struct ppp_lcp_t *lcp, struct lcp_option_t *opt); +static int mru_send_conf_req(struct ppp_lcp_t *lcp, struct lcp_option_t *opt, uint8_t *ptr); +static int mru_send_conf_nak(struct ppp_lcp_t *lcp, struct lcp_option_t *opt, uint8_t *ptr); +static int mru_recv_conf_req(struct ppp_lcp_t *lcp, struct lcp_option_t *opt, uint8_t *ptr); +static int mru_recv_conf_ack(struct ppp_lcp_t *lcp, struct lcp_option_t *opt, uint8_t *ptr); +static void mru_print(void (*print)(const char *fmt,...),struct lcp_option_t*, uint8_t *ptr); + +struct mru_option_t +{ + struct lcp_option_t opt; + int mru; + int mtu; +}; + +static struct lcp_option_handler_t mru_opt_hnd= +{ + .init=mru_init, + .send_conf_req=mru_send_conf_req, + .send_conf_nak=mru_send_conf_nak, + .recv_conf_req=mru_recv_conf_req, + .recv_conf_ack=mru_recv_conf_ack, + .free=mru_free, + .print=mru_print, +}; + +static struct lcp_option_t *mru_init(struct ppp_lcp_t *lcp) +{ + struct mru_option_t *mru_opt=_malloc(sizeof(*mru_opt)); + memset(mru_opt, 0, sizeof(*mru_opt)); + mru_opt->mru = (conf_mru && conf_mru <= lcp->ppp->ctrl->max_mtu) ? conf_mru : lcp->ppp->ctrl->max_mtu; + if (mru_opt->mru > conf_max_mtu) + mru_opt->mru = conf_max_mtu; + mru_opt->mtu = (conf_mtu && conf_mtu <= lcp->ppp->ctrl->max_mtu) ? conf_mtu : lcp->ppp->ctrl->max_mtu; + if (mru_opt->mtu > conf_max_mtu) + mru_opt->mtu = conf_max_mtu; + mru_opt->opt.id = CI_MRU; + mru_opt->opt.len = 4; + + return &mru_opt->opt; +} + +static void mru_free(struct ppp_lcp_t *lcp, struct lcp_option_t *opt) +{ + struct mru_option_t *mru_opt = container_of(opt, typeof(*mru_opt), opt); + + _free(mru_opt); +} + +static int mru_send_conf_req(struct ppp_lcp_t *lcp, struct lcp_option_t *opt, uint8_t *ptr) +{ + struct mru_option_t *mru_opt = container_of(opt,typeof(*mru_opt),opt); + struct lcp_opt16_t *opt16 = (struct lcp_opt16_t*)ptr; + opt16->hdr.id = CI_MRU; + opt16->hdr.len = 4; + opt16->val = htons(mru_opt->mru); + return 4; +} + +static int mru_send_conf_nak(struct ppp_lcp_t *lcp, struct lcp_option_t *opt, uint8_t *ptr) +{ + struct mru_option_t *mru_opt = container_of(opt,typeof(*mru_opt),opt); + struct lcp_opt16_t *opt16 = (struct lcp_opt16_t*)ptr; + opt16->hdr.id = CI_MRU; + opt16->hdr.len = 4; + opt16->val = htons(mru_opt->mtu); + return 4; +} + +static int mru_recv_conf_req(struct ppp_lcp_t *lcp, struct lcp_option_t *opt, uint8_t *ptr) +{ + struct mru_option_t *mru_opt = container_of(opt,typeof(*mru_opt),opt); + struct lcp_opt16_t *opt16 = (struct lcp_opt16_t*)ptr; + + /*if (!ptr) + return LCP_OPT_NAK;*/ + + if (opt16->hdr.len != 4) + return LCP_OPT_REJ; + + if (ntohs(opt16->val) < conf_min_mtu || ntohs(opt16->val) > lcp->ppp->ctrl->max_mtu || ntohs(opt16->val) > conf_max_mtu) + return LCP_OPT_NAK; + + mru_opt->mtu = ntohs(opt16->val); + return LCP_OPT_ACK; +} + +static int mru_recv_conf_ack(struct ppp_lcp_t *lcp, struct lcp_option_t *opt, uint8_t *ptr) +{ + struct mru_option_t *mru_opt = container_of(opt,typeof(*mru_opt), opt); + struct ifreq ifr = { + .ifr_mtu = mru_opt->mtu, + }; + + strcpy(ifr.ifr_name, lcp->ppp->ifname); + + if (ioctl(lcp->ppp->unit_fd, PPPIOCSMRU, &mru_opt->mru)) + log_ppp_error("lcp:mru: failed to set MRU: %s\n", strerror(errno)); + + if (ioctl(sock_fd, SIOCSIFMTU, &ifr)) + log_ppp_error("lcp:mru: failed to set MTU: %s\n", strerror(errno)); + + return 0; +} + +static void mru_print(void (*print)(const char *fmt,...), struct lcp_option_t *opt, uint8_t *ptr) +{ + struct mru_option_t *mru_opt = container_of(opt, typeof(*mru_opt), opt); + struct lcp_opt16_t *opt16 = (struct lcp_opt16_t*)ptr; + + if (ptr) + print("<mru %i>",ntohs(opt16->val)); + else + print("<mru %i>",mru_opt->mru); +} + +static void __init mru_opt_init() +{ + char *opt; + + opt = conf_get_opt("ppp", "mtu"); + if (opt && atoi(opt) > 0) + conf_mtu = atoi(opt); + + opt = conf_get_opt("ppp", "mru"); + if (opt && atoi(opt) > 0) + conf_mru = atoi(opt); + + opt = conf_get_opt("ppp", "min-mtu"); + if (opt && atoi(opt) > 0) + conf_min_mtu = atoi(opt); + + opt = conf_get_opt("ppp", "max-mtu"); + if (opt && atoi(opt) > 0) + conf_max_mtu = atoi(opt); + + lcp_option_register(&mru_opt_hnd); +} + |